WO2005076358A1 - Method for manufacturing thin film integrated circuit, and element substrate - Google Patents
Method for manufacturing thin film integrated circuit, and element substrate Download PDFInfo
- Publication number
- WO2005076358A1 WO2005076358A1 PCT/JP2005/001541 JP2005001541W WO2005076358A1 WO 2005076358 A1 WO2005076358 A1 WO 2005076358A1 JP 2005001541 W JP2005001541 W JP 2005001541W WO 2005076358 A1 WO2005076358 A1 WO 2005076358A1
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- WO
- WIPO (PCT)
- Prior art keywords
- thin film
- film integrated
- integrated circuit
- manufacturing
- integrated circuits
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/1259—Multistep manufacturing methods
- H01L27/1262—Multistep manufacturing methods with a particular formation, treatment or coating of the substrate
- H01L27/1266—Multistep manufacturing methods with a particular formation, treatment or coating of the substrate the substrate on which the devices are formed not being the final device substrate, e.g. using a temporary substrate
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- G—PHYSICS
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- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
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- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
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- G—PHYSICS
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- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
- G06K19/07758—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card arrangements for adhering the record carrier to further objects or living beings, functioning as an identification tag
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/13—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body combined with thin-film or thick-film passive components
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02367—Substrates
- H01L21/0237—Materials
- H01L21/0242—Crystalline insulating materials
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02367—Substrates
- H01L21/0237—Materials
- H01L21/02422—Non-crystalline insulating materials, e.g. glass, polymers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
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Definitions
- the present invention relates to a method for manufacturing a thin film integrated circuit which can store much information and an element substrate in which the thin film integrated circuit is manufactured.
- one feature of the invention is that a thin film integrated circuit (also referred to as an IDF chip or a semiconductor device) is formed over a substrate having an insulating surface (insulating substrate), the insulating substrate is separated, and IDF chips are prevented from being separated from each other.
- a thin film integrated circuit also referred to as an IDF chip or a semiconductor device
- IDF chips are prevented from being separated from each other.
- an IDF chip can be reduced.
- An IDF chip whose unit price is very low can generate huge profits by reducing unit cost.
- the insulating substrate can be reused by separating the insulating substrate. Therefore, the invention can realize lower cost than a conventional IC chip which is thinned by polishing a silicon wafer.
- An extremely thin IDF chip can be manufactured by separating an insulating substrate. After separated from the insulating substrate, the IDF chip may be transferred to another insulating substrate (also referred to as a transfer substrate). At this time, the transfer substrate is preferably a substrate having flexibility (hereinafter also referred to as a flexible substrate). In some cases, transferring an element of an IDF chip (including the one in process of manufacturing) to another substrate as described above is referred to as "transfer".
- a specific feature of the invention is that an insulating substrate is separated by removing a separation layer formed over the insulating substrate.
- a method for removing the separation layer includes a chemical removal method with the use of an etchant (gas or liquid) and a physical removal method with stress applied.
- an etchant gas or liquid
- a gas or liquid including halide can typically be used as the etchant.
- C1F 3 chlorine trifluoride
- NF 3 nitrogen trifluoride
- BrF 3 bromine trifluoride
- HF hydrogen fluoride
- an antenna substrate a substrate to be provided with an antenna (referred to as an antenna substrate) is attached.
- an antenna substrate is provided with an opening and is attached to an insulating substrate that is provided with an
- IDF chip and a groove thereafter, a separation layer is chemically removed with an etchant.
- antennas can be attached to integrated IDF chips without being separated from each other.
- connection region As another means to prevent IDF chips from being separated from each other, a part of an insulating film or a conductive film formed between IDF chips is left unremoved while forming a groove (the unremoved region is referred to as a connection region). In this case, the separation layer is removed by an etchant introduced from the selectively formed groove. At this time, the IDF chips are integrated without being separated from each other since the IDF chips are connected to each other by the connection region.
- One feature of an element substrate in which an IDF chip is manufactured as described above is to have an insulating substrate provided with a plurality of thin film integrated circuits with a separation layer therebetween, an antenna substrate placed opposite to the insulating substrate, wherein the antenna substrate is provided with an antenna and an opening, and a groove is provided between the thin film integrated circuits to correspond to the opening.
- One feature of an element substrate having another structure is to have an insulating substrate provided with a plurality of thin film integrated circuits with a separation layer therebetween, an antenna substrate placed opposite to the insulating substrate, wherein the plurality of thin film integrated circuits are integrated by a connection region, the antenna substrate is provided with an antenna and an opening, a groove is provided between the thin film integrated circuits to correspond to the opening, and an opening is provided in the thin film integrated circuit.
- an IDF chip is formed over an insulating substrate in this manner, there is less limitation on the shape of a mother substrate compared with the case of taking a chip out of a circular silicon wafer. Therefore, the productivity of ah IDF chip can be improved and mass production thereof can be performed.
- the cost of an IDF chip can be reduced.
- An IDF chip whose unit price is very low can generate huge profits by reducing unit cost.
- the number of chips in the case of using a silicon wafer with a diameter of 12 inches is compared with that in the case of using a glass substrate with a 9 9 size of 7300 x 9200 mm .
- the area of the former, the silicon wafer is about 73000 mm whereas the area of the latter, the glass substrate, is about 672000 mm 2 .
- the glass substrate is about 9.2 times as large as the silicon substrate.
- the glass substrate with an area of about 672000 mm can be provided with, leaving out of consideration the cutting margin, about 672000 IDF chips of 1 mm square, which is about 9.2 times as many as the silicon substrate. Since mass production of the IDF chip using the glass substrate with a size of 7300 x 9200 mm can be achieved with fewer steps than the case of using the silicon substrate with a diameter of 12 inches, the amount of capital investment can be reduced to one-third. [0019] When IDF chips are manufactured without being separated from each other as described above, there is no concern that an exhaust system of an apparatus is clogged with IDF chips during processing. The complexity of handling very small IDF chips can be reduced. A thin IDF chip formed over a large substrate might warp due to stress. However, the warpage can be prevented by manufacturing IDF chips to be integrated. In particular, warpage prevention effect can be enhanced by providing a connection region between the IDF chips.
- FIGS. 1A and IB show a step of manufacturing a thin film integrated circuit.
- FIGS. 2 A to 2C show a step of manufacturing a thin film integrated circuit.
- FIGS. 3 A to 3C show a step of manufacturing a thin film integrated circuit.
- FIGS. 4Ato 4C show a step of manufacturing a thin film integrated circuit.
- FIGS. 5 A to 5C show a step of manufacturing a thin film integrated circuit.
- FIGS. 6Ato 6C show a step of manufacturing a thin film integrated circuit.
- FIGS. 7 A and 7B show a step of manufacturing an antenna.
- FIGS. 8A to 8C show a step of manufacturing a thin film integrated circuit.
- FIGS. 1A and IB show a step of manufacturing a thin film integrated circuit.
- FIGS. 2 A to 2C show a step of manufacturing a thin film integrated circuit.
- FIGS. 3 A to 3C show a step of manufacturing a thin film integrated circuit.
- FIGS. 9 A to 9C show a step of manufacturing a thin film integrated circuit.
- FIGS. 10A to 10C show a step of manufacturing a thin film integrated circuit.
- FIGS. 11 A to 11C show a step of manufacturing a thin film integrated circuit.
- FIGS. 12Ato 12C show a step of manufacturing a thin film integrated circuit.
- FIGS. 13A to 13C show a step of manufacturing a thin film integrated circuit.
- FIGS. 14Ato 14E show a step of manufacturing a thin film integrated circuit. .
- FIGS. 15A and 15B show an article mounted with a thin film integrated circuit.
- FIGS. 16Ato 16C show an article mounted with a thin film integrated circuit.
- FIGS. 17A and 17B show an article mounted with a thin film integrated circuit.
- FIGS. 18 A shows an application of an article mounted with a thin film integrated circuit and FIG. 18B shows a circuit configuration of an IDF chip and a reader/ writer.
- FIGS. 19A and 19B show a bent article mounted with a thin film integrated circuit.
- FIGS. 20A and 20B show a step of manufacturing a thin film integrated circuit.
- FIGS. 21A and 21B show a step of manufacturing a thin film integrated circuit.
- FIGS. 22 A to 22C show a mode of a thin film integrated circuit.
- FIGS. 23A and 23B show a step of manufacturing a thin film integrated circuit.
- FIG. 24 shows a manufacturing apparatus of a thin film integrated circuit.
- FIGS. 25Ato 25D show a step of manufacturing a thin film integrated circuit.
- FIGS. 26 A and 26B show a step of manufacturing a thin film integrated circuit.
- FIG. 27 shows an article mounted with a thin film integrated circuit.
- FIG. 28 shows an article mounted with a thin film integrated circuit.
- a separation layer 102 and a thin film transistor (also referred to as a TFT) layer 103 having a semiconductor film as an active region are sequentially formed over an insulating substrate 100, thereby forming a plurality of IDF chips 104.
- the semiconductor film is formed to be 0.2 ⁇ m or less, typically, 40 nm to 170 nm, and preferably, 50 nm to 150 nm in thickness.
- IDF chip can be made thinner than a chip formed with a silicon wafer.
- a specific thickness of the IDF chip is 0.3 ⁇ m to 3 ⁇ m, typically, approximately 2 ⁇ m.
- a groove 105 is formed on the TFT layer at the boundary between the IDF chips.
- the groove can be formed by dicing, scribing, etching with the use of a mask, or the like.
- the groove is formed to have such a depth as to expose the separation layer. Note that the groove need not necessarily be formed at every boundary between the IDF chips, but it may be formed at intervals of boundaries between the IDF chips.
- an opening 108 may be formed in the TFT layer 103.
- the opening needs to be formed in the TFT layer 103 except in a region where the semiconductor film is formed.
- the size of the groove can be reduced and the time needed to remove the separation layer can be shortened.
- a substrate made of glass such as barium borosilicate glass or alumino borosilicate glass; a quartz substrate; or the like can be used as the insulating substrate.
- a substrate made of a synthetic resin such as plastic typified by polyethylene terephthalate (PET), polyethylene naphthalate (PEN), or polyether sulfone (PES) or acrylic can be used as another substrate having an insulating surface.
- PET polyethylene terephthalate
- PEN polyethylene naphthalate
- PES polyether sulfone
- acrylic acrylic
- a metal such as stainless steel, a semiconductor substrate, or the like provided on the surface thereof with an insulating film of silicon oxide, silicon nitride, or the like can also be used.
- there is less limitation on the shape of a mother substrate compared with the case of taking a chip out of a circular silicon wafer.
- the separation layer is only necessary to be a film containing silicon, which may be in any condition of an amorphous semiconductor, a semi-amorphous semiconductor (also referred to ais a SAS) in which an amorphous state and a crystalline state are mixed, and a crystalline semiconductor.
- a semi-amorphous semiconductor also referred to ais a SAS
- the SAS includes a microcrystalline semiconductor in which a crystal grain of 0.5 nm to 20 nm can be observed within an amorphous semiconductor.
- the separation layer can be formed by a sputtering method, a plasma CVD method, or the like.
- the thickness of the separation layer is preferably in the range of 30 nm to 1 ⁇ m, and can even be 30 nm or less, provided that the thickness does not fall below a minimum thickness determined for the film formation apparatus.
- the separation layer may be added with an element such as phosphorus or boron.
- the element may be activated by heating or the like.
- a reaction rate, that is, an etching rate of the separation layer can be increased by adding the element.
- a base film is formed over the separation layer so that the TFT layer is not etched.
- a silicon oxide (SiOx) film a silicon nitride (SiNx) film, a silicon oxynitride (SiOxNy) (x>y) film
- SiNxOy silicon nitride oxide
- An antenna substrate 111 is provided with a plurality of antennas 112 having a predetermined shape and is suitably provided with an opening 113.
- the opening has a circular shape (corresponding to a so-called hole), a rectangular shape (corresponding to a so-called slit), or the like.
- the opening is preferably formed to overlap the groove 105.
- the insulating substrate 100 is attached to the antenna substrate 111 with an adhesive or the like.
- An anisotropic conductor including a dispersed conductor, an ultrasonic adhesive, or an ultraviolet curing resin can be used as the adhesive.
- an etchant 115 is introduced into the opening and the groove with the antenna substrate attached to the insulating substrate to remove the separation layer.
- a gas or liquid including halide typified by C1F 3 is employed as the etchant.
- the insulating substrate is separated after the separation layer is removed.
- each IDF chip is cut by a dicing, scribing, or laser cutting method.
- each IDF chip can be cut by using a laser which is absorbed by a glass substrate, such as a CO 2 laser.
- the periphery of the IDF chip such as a side face may be covered with an organic resin such as an epoxy resin. Accordingly, the IDF chip is protected from outside and becomes easily portable.
- the thus formed IDF chip can be 5 mm squared (25 mm 2 ) or less, preferably, 0.3 mm squared (0.09 mm 2 ) to 4 mm squared (16 mm 2 ).
- the IDF chip of the invention can be completed without an insulating surface and be mounted on an article. Therefore, the IDF chip can be thinned and reduced in weight, and the article mounted therewith can also be thinned and reduced in weight as a whole.
- the IDF chip that is separately transferred to a transfer substrate may be mounted.
- the transfer substrate is preferably a flexible substrate.
- a substrate made of a synthetic resin such as plastic typified by polyethylene terephthalate (PET), polyethylene naphthalate (PEN), or polyeter sulfone (PES) or acrylic can be used as the flexible substrate.
- thermosetting resin an ultraviolet curing resin, an epoxy resin, a resin additive, two-sided tape, or the like can be used as an adhesive for attaching the flexible substrate.
- the breaking strength of the IDF chip can be increased.
- the IDF chip transferred to the flexible substrate can be made more lightweight, thinner, and more flexible than the IDF chip formed over the insulating substrate.
- planarizing treatment can be performed by forming an organic resin or an inorganic film by an application method or a droplet discharge method.
- a droplet discharge method is a method for selectively discharging (spraying) a droplet (also referred to as a dot) of a composition mixed with a material of a conductive film, an insulating film, or the like, which is also referred to as an ink-jet method depending on its mode.
- the IDF chip is formed over the substrate with an insulating surface, as described above, there is less limitation on the shape of a mother substrate, when compared with the case of taking a chip out of a circular silicon wafer. Therefore, the productivity of an IDF chip can be improved and mass production thereof can be performed. Since the insulating substrate can be reused, the cost of an IDF chip can be reduced. Accordingly, reduction in cost of the IDF chip can be achieved.
- the IDF chip has a semiconductor film of 0.2 ⁇ m or less as an active region and is very thin unlike a chip formed with a silicon wafer.
- the method for transferring to a flexible substrate can be employed.
- Such a thin, lightweight, or highly flexible IDF chip is harder to damage than a chip formed with a silicon wafer.
- the IDF chip includes a contactless IDF chip mounted with an antenna (also referred to as an RFID tag or an RFID chip, or an RFID memory or an RFID processor depending on the application), a contact IDF chip provided with a terminal connected to an external power source without an antenna mounted, and a hybrid IDF chip which is a combination of a contactless type and a contact type.
- an antenna also referred to as an RFID tag or an RFID chip, or an RFID memory or an RFID processor depending on the application
- a contact IDF chip provided with a terminal connected to an external power source without an antenna mounted
- a hybrid IDF chip which is a combination of a contactless type and a contact type.
- Embodiment Mode 2 A mode of selectively forming a groove and partially leaving an insulating film, a conductive film, or the like provided between IDF chips is described in this embodiment mode.
- a separation layer 102 and a TFT layer 103 are sequentially formed over an insulating substrate 100, thereby forming a plurality of IDF chips 104 similarly as in Embodiment Mode 1. Note that details of the TFT layer are to be described below.
- a groove 105 formed at the boundary between the IDF chips is selectively formed, an insulating film, a conductive film, or the like is left between the IDF chips.
- an opening 108 may be formed in the TFT layer 103.
- the insulating substrate is separated; however, the IDF chips are not separated from each other since they are integrated by the connection region. [0051]
- the separated insulating substrate can be reused as in Embodiment Mode 1. [0052] Thereafter, an antenna is formed if necessary as shown in FIG. 8C. An antenna
- the IDF chip can be thinned and reduced in weight, and the article mounted therewith can also be thinned and reduced in weight as a whole.
- the IDF chip may be transferred to a transfer substrate as in Embodiment Mode 1. Accordingly, the breaking strength of the IDF chip can be increased.
- Embodiment Mode 3 A mode of attaching the antenna substrate which is provided with an opening, as described in Embodiment Mode 1, to the insulating substrate which is provided with a connection region between IDF chips, as described in Embodiment Mode 2, is described in this embodiment mode.
- an antenna substrate 111 provided with an antenna 112 and an opening
- the antenna substrate is preferably attached to position the opening 113 to the groove 105.
- the IDF chips are cut by a dicing, scribing, or laser cutting method.
- the IDF chips can be cut by using a laser which is absorbed by a glass substrate, such as a CO 2 laser.
- FIG. 2A is a top view in the case of forming 12 IDF chips over an insulating substrate 100
- FIG 2B is a cross-sectional view of line a-b from FIG.
- FIG. 2B is a cross-sectional view of line c-d from FIG. 2A.
- a TFT layer formed over the insulating substrate 100 with a separation layer 102 therebetween includes thin film transistors 128n and 128p, each having an insulating film, a semiconductor film 124 patterned into a desired shape, an insulating film which functions as a gate insulating film (hereinafter referred to as a gate insulating film) 125, and a conductive film which functions as a gate electrode (hereinafter referred to as a gate electrode) 126.
- the semiconductor film includes a channel formation region and an impurity region (including a source region, a drain region, a GOLD region, and an LDD region) and can be divided into an n-channel thin film transistor 128n and a p-channel thin film transistor 128p depending on the conductivity of an added impurity element.
- the semiconductor film also includes a wiring 130 formed to connect to each impurity region.
- a SAS having thicknesses of 30 nm to 1 ⁇ m, preferably, 30 nm to 50 nm is used as the separation layer; however, another material described above may be used.
- the insulating film may have a laminated structure and has a first insulating film 121, a second insulating film 122, and a third insulating film 123 in this embodiment.
- a silicon oxide film is used as the first insulating film; a silicon oxynitride film, as the second insulating film; and a silicon oxide film, as the third insulating film.
- a silicon oxynitride film is preferably used. However, there is concern that the silicon oxynitride film has poor adhesion with the separation layer and the semiconductor film.
- the semiconductor film 124 may be in any condition of an amorphous semiconductor, a SAS in which an amorphous state and a crystalline state are mixed, a microcrystalline semiconductor in which a crystal grain of 0.5 nm to 20 nm can be observed within an amorphous semiconductor, and a crystalline semiconductor.
- a substrate which can withstand a film formation processing temperature for example, a quartz substrate, a crystalline semiconductor film may be formed over the substrate by a CND method or the like.
- an amorphous semiconductor film is formed and heat-treated to form a crystallized crystalline semiconductor film.
- a heating furnace, laser irradiation, irradiation with light emitted from a lamp in place of laser light (hereinafter referred to as lamp annealing), or a combination thereof can be employed as the heat treatment.
- a continuous wave laser (CW laser) or a pulsed wave laser (pulsed laser) can be used in the case of employing laser irradiation; one of or a plurality of an Ar laser, a Kr laser, an excimer laser, a YAG laser, a Y 2 O 3 laser, a YNO 4 laser, a YLF laser, a YAlO 3 laser, a glass laser, a ruby laser, an alexandrite laser, a Ti:sapphire laser, a copper vapor laser, and a gold vapor laser may be used.
- a crystal having a large grain size can be obtained by irradiation with a fundamental wave of the above laser and a second harmonic to a fourth harmonic of the fundamental wave.
- a second harmonic (532 nm) or a third harmonic (355 nm) of an ⁇ d:YVO 4 laser can be used.
- Energy density of the laser at the time needs to be in the range of approximately 0.01 MW/cm 2 to 100 MW/cm 2 (preferably, 0.1 MW/cm 2 to 10 MW/cm 2 ).
- laser irradiation is performed at scanning speed of approximately 10 cm/sec to 2000 cm/sec.
- crystallization is performed with the use of an optical system as shown in FIG. 23A and a CW laser.
- a CW laser beam emitted from a laser oscillator 290 is elongated by an optical system 291 and is processed into a linear shape.
- a laser beam can be processed into a linear shape when the laser beam passes a cylindrical lens or a convex lens included in the optical system 291.
- the laser beam is preferably processed to have a spot long axis length of 200 ⁇ m to 350 ⁇ m.
- the laser beam processed into a linear shape enters the semiconductor film 124 through a galvanometer mirror 293 and an f ⁇ lens 294. At this time, the linear laser is adjusted to form a laser spot 282 having a predetermined size on the semiconductor film.
- the f ⁇ lens 294 makes the shape of the laser spot 282 constant on the surface of an irradiated object, regardless of the angle of the galvanometer mirror.
- a device (control device) 296 for controlling the vibration of the galvanometer mirror vibrates the. galvanometer mirror, in other words, changes the angle of the mirror.
- the laser spot 282 is moved in one direction (for example, in an X-axis direction in the figure). For example, when the galvanometer mirror vibrates in half cycle, the laser spot is moved in an X-axis direction on the semiconductor film by a certain width (outward). [0075] Then, the semiconductor film is moved on a Y-axis direction by an XY stage 295.
- the laser spot is moved on an X-axis direction on the semiconductor film by the galvanometer mirror in the same manner (homeward). With such back-and-forth movement of the laser beam, the laser spot is moved along a pathway 283 to perform the laser annealing on the entire semiconductor film. [0076] As shown in FIG. 23B, the laser annealing is performed on the thin film transistor so that a carrier flow direction 281 and a moving direction of the laser beam to a long axis (scanning direction) are in the same direction. For example, in the case of a semiconductor film 230 having such a shape as shown in FIG.
- a source region 230(s), a channel formation region 230(c), and a drain region 230(d) formed in the semiconductor film are arranged to be parallel to the moving direction of the laser beam to a long axis (scanning direction). Consequently, grain boundaries through which carriers pass can be reduced or eliminated; therefore, mobility of the thin film transistor can be improved.
- the laser may have an incident angle ⁇ (0 ⁇ 90°) to the semiconductor film. Consequently, laser interference can be prevented.
- the semiconductor film may be irradiated with continuous wave laser light of a fundamental wave and continuous wave laser light of a harmonic, or may be irradiated with continuous wave laser light of a fundamental wave and pulsed wave laser light of a harmonic.
- pulsed laser may be oscillated with such a repetition rate that the laser of the next pulse is emitted after melting the semiconductor film and before solidifying the semiconductor film. This makes it possible to obtain crystal grains that are sequentially grown in the scanning direction. In other words, it is possible to use a pulsed beam with a low repetition rate limit that is set shorter than the time required for the melted semiconductor film by the preceding beam to solidify.
- a pulsed beam with repetition rate of 10 MHz or more which are much higher repetition rate than that of several tens to several hundreds Hz of a normally used pulsed beam.
- the laser light irradiation may be performed in an inert gas atmosphere such as a noble gas or nitrogen. This can suppress roughness of a semiconductor surface due to the laser light irradiation and prevent variations in the threshold caused by variations in interface state density.
- a microcrystalline semiconductor film may be formed by using SiH 4 and F , or SiH 4 and H 2 and be then irradiated with the laser as described above for crystallization.
- an amorphous semiconductor film is heated at temperatures of 500 °C to 550 °C for 2 to 20 hours.
- the temperature may be set in multiple stages in the range of 500 °C to 550 °C so as to gradually reach a higher temperature. Since hydrogen and the like of the amorphous semiconductor film are released at the first low temperature heating step, so-called dehydrogenation can be perfo ⁇ ned to reduce film roughness during crystallization.
- a metal element which accelerates crystallization for example, Ni
- the heat temperature can be lowered, which is preferable. Even in the case of using such a metal element, heat treatment can be perfo ⁇ ned at high temperatures of 600 °C to 950 °C.
- a gettering step is required to reduce or remove the metal element.
- the step may be performed to capture the metal element by using the amorphous semiconductor film as a gettering sink.
- a crystalline semiconductor film may be directly formed on a formation surface.
- the crystalline semiconductor film can be directly formed on a formation surface by utilizing heat or plasma with the use of a fluorine-based gas such as GeF 4 or F 2 and a silane-based gas such as SiH 4 or Si 2 H 6 .
- a quartz substrate that is highly heat resistant may preferably be employed.
- the heat treatment of the semiconductor film is considered to affect the separation layer.
- the heat treatment is performed by a heating furnace or laser irradiation with a wavelength of 532 nm, energy reaches the separation layer in some cases. Accordingly, the separation layer may also be crystallized at the same time. A reaction rate can be improved depending on a state of crystallization of the separation layer.
- the base film can be formed to have a structure that prevents the energy of a laser from reaching the separation layer.
- a semiconductor film formed by any of the above described means contains more hydrogen than a chip formed with a silicon wafer.
- the semiconductor film can be formed to contain hydrogen of 1 x 10 19 /cm 3 to 1 x 10 22 /cm 3 , preferably, 1 x 10 " 90 "X
- the hydrogen can provide a so-called dangling-bond termination effect, which reduces dangling bonds in the semiconductor film. Further, the hydrogen can increase flexibility of the IDF chip.
- the thin film transistor having a semiconductor film has a subthreshold coefficient
- the thin film transistor has mobility of 10 cm " V/sec or more.
- a repetition rate thereof is 1 MH or more, preferably, 100 MHz or more at a power supply voltage of 3 V to
- the delay time per stage of an inverter is 26 ns, preferably, 0.26 ns or less at a power supply voltage of 3 N to 5 N.
- SiOx silicon oxide
- SiNx silicon nitride
- SiNxNy silicon oxynitride
- SiNxOy silicon nitride oxide
- Planarity can be improved by the second interlayer insulating film.
- An organic material or an inorganic material can be used for the second interlayer insulating film.
- Polyimide, acrylic, polyamide, polyimide amide, a resist, benzocyclobutene, siloxane, or polysilazane can be used as an organic material.
- Siloxane is formed by using as a starting material a polymer material in which a skeletal structure is configured by a bond of silicon and oxygen and which contains at least hydrogen as a substituent or which contains at least one of fluorine, an alkyl group, and aromatic hydrocarbon as a substituent.
- Polysilazane is formed by using as a starting material a liquid material including a polymer material having a bond of silicon (Si) and nitrogen (N).
- An insulating film having an inorganic material is preferably formed over the organic material to prevent that.
- an insulating film containing nitrogen is used for the inorganic material, entry of alkali ions such as Na can be prevented.
- a fourth insulating film 131 is provided to cover the wiring 130. Since an article mounted with the IDF chip is often touched by bare hands, there is concern of diffusion of alkali ions such as Na. Therefore, the fourth insulating film is preferably formed on the top surface of the IDF chip.
- a silicon nitride oxide (SiNxOy) film is preferably used.
- FIG. 3A is a top view with an antenna substrate 111 attached
- FIG. 3B is a cross-sectional view of line a-b from FIG. 3A
- FIG. 3C is a cross-sectional view of line c-d from FIG. 3A.
- An anisotropic conductor 141 including dispersed conductors 140 can be used as an attaching means.
- the anisotropic conductor can electrically join a connection terminal of the IDF chip to a connection terminal of the antenna since the conductors are bonded to each other by pressure due to the thickness of each connection terminal. A region other than the connection terminals remains nonconductive since sufficient distance is kept between the conductors.
- the antenna substrate may be attached with the use of an ultrasonic adhesive, an ultraviolet curing resin, two-sided tape, or the like.
- the antenna substrate 111 is provided with an antenna 112 and an opening 113.
- the position of the antenna corresponds to the IDF chip.
- the position of the opening 113 corresponds to the groove 105. Detailed manufacturing steps of the antenna and the opening are described below.
- the openings are formed at every boundary between the antennas; however, they may be formed at intervals of boundaries. Further, the case of the opening having a circular shape is also described in this embodiment; however, the invention is not limited thereto.
- the opening may be formed to have a slit shape. As described above, the shape and the position of the groove 105 and the opening 113 can be appropriately set.
- the separation layer is removed by introducing a gas or liquid containing halide typified by C1F 3 as an etchant as shown in FIGS. 4A to 4C.
- the separation layer is removed by using a low pressure CND apparatus, shown in FIG.
- the low pressure CVD apparatus shown in FIG. 24 has a bell jar 89 which enables treatment of a plurality of insulating substrates 100.
- C1F 3 115 is introduced through a gas introduction pipe, and unnecessary gas is expelled through an exhaust pipe 92. At this time, there is no possibility that the IDF chips are drawn into the exhaust pipe since the IDF chips are integrated by the antenna substrate.
- FIG. 4A is a top view showing a state of introducing a gas or liquid containing halide typified by C1F 3 to remove a separation layer
- FIG. 4B is a cross-sectional view of line a-b from FIG. 4A
- FIG. 4C is a cross-sectional view of line c-d from FIG. 4A.
- FIG. 4B shows the state of introducing a gas or liquid containing halide typified by C1F 3 into an opening 113 and a groove 105.
- a processing temperature by a heating means, is in the range of 100 °C to 300 °C, the reaction rate can be increased. Consequently, consumption of C1F 3 gas can be reduced and processing time can be shortened.
- the separation layer of a SAS gradually recedes by introducing an etchant in this manner. Then, the insulating substrate can be removed as indicated by the arrow.
- An etchant, gas flow rate, temperature, and the like are set so that each layer of the TFT is not etched. Since C1F 3 used in this embodiment has a characteristic of selectively etching silicon, it selectively removes the separation layer of a SAS.
- a layer mainly containing silicon typified by a SAS is used as the separation layer, and an insulating film containing oxygen or nitrogen is used as the base film. Since difference in the reaction rate between the separation layer and the base film is large, meaning that the selectivity is high, the separation layer can be easily removed, with the IDF chip protected.
- the TFT layer is not etched by C1F 3 due to the base film and a protective film which are provided above and below the TFT layer and edge portions of the interlayer insulating film, the gate insulating film, the wiring, and the like which are exposed on the side face.
- C1F 3 can be generated through a process of Cl 2 (g) + 3F 2 (g) ⁇ 2ClF 3 (g) by the reaction of chlorine with fluorine at temperatures of 200 °C or more.
- C1F 3 (boiling point: 11.75 °C) can liquefy depending on the temperature of the reaction field.
- wet etching can also be employed using C1F 3 as the liquid containing halide.
- a gas of C1F 3 or the like mixed with nitrogen may be used as another gas containing halide (typified by C1F 3 ).
- the etchant is not limited to C1F 3 or halide as long as it etches the separation layer and it does not etch the base film.
- a plasma gas containing fluorine such as CF 4 , SF 6 , NF 3 , or F can be used.
- a strong alkaline solution such as tetraethylammonium hydroxide (TMAH) may be used as another etchant.
- TMAH tetraethylammonium hydroxide
- the combination of the separation layer and the base film is not limited to the above-described material as long as the material that is selectively etched is used for the separation layer and a material that is not etched is used for the base film.
- the IDF chips are integrated by the antenna substrate. Thereafter, the IDF chips are cut by a dicing, scribing, or laser cutting method, thereby completing the IDF chip. Then, the IDF chip may be mounted on an article.
- a thermosetting resin, an ultraviolet curing resin, an epoxy resin, a resin additive, two-sided tape, or the like can be used as an adhesive for mounting.
- FIG. 5A is a top view showing a state of attaching a flexible substrate 150 with an adhesive 151
- FIG. 5B is a cross-sectional view of line a-b from FIG. 5A
- FIG. 5C is a cross-sectional view of line c-d from FIG. 5A.
- a substrate made of a synthetic resin such as plastic as described above or acrylic can be used as the flexible substrate.
- a substrate made of plastic is used.
- thermosetting resin an ultraviolet curing resin, an epoxy resin adhesive, a resin additive, two-sided tape, or the like can be used as the adhesive.
- the breaking strength of the IDF chip can be increased by transferring the IDF chip to the flexible substrate.
- the IDF chips are cut by a dicing, scribing, or laser cutting method as shown in
- FIGS. 6 A to 6C thereby completing the IDF chip formed over the flexible substrate.
- FIG. 6A is a top view showing the state of the cut IDF chip
- FIG. 6B is a cross-sectional view of line a-b from FIG. 6A
- FIG. 6C is a cross-sectional view of line c-d from FIG. 6A.
- the thus formed IDF chip may be mounted on an article.
- a thermosetting resin, an ultraviolet curing resin, an epoxy resin, a resin additive, two-sided tape, or the like can be used as an adhesive for mounting.
- the IDF chips which are integrated until just before being completed in this manner can reduce the complexity of handling separated IDF chips.
- they may be integrated until just before being mounted on an article.
- the IDF chips are cut only in one direction in line and placed on an IDF chip mounting apparatus, and then cut in the other direction at the time of mounting on an article. This makes it possible to reduce the complexity of handling separated IDF chips and to easily mount the
- the IDF chip is mounted with the use of an anisotropic conductor in a "face-down" manner, where the connection terminal of the IDF chip faces the antenna, as described; however, the IDF chip may also be mounted in a "face-up” manner, where the connection terminal faces in the opposite direction to the antenna.
- a wire bonding method can be used as a means for connection.
- a thin film transistor is formed over the insulating substrate 100, and the insulating substrate 100 is then separated. Preferably, the thin film transistor is further transferred to a flexible substrate. However, the timing of or the number of separations performed is not limited to this embodiment.
- the thin film transistor may be mounted on an article (mount article) without transferring the thin film transistor to the flexible substrate. The mounting of the IDF chip in a "face-up" or
- an antenna 112 is formed over an antenna substrate 111 by a droplet discharge method with the use of a nozzle 160.
- the antenna can be formed by any one of the following methods: a sputtering method, a printing method, a plating method, a photolithography method, an evaporation method with the use of a metal mask, and a combination thereof, in lieu of a droplet discharge method.
- a first antenna is formed by a sputtering method, a droplet discharge method, a printing method, a photolithography method, or an evaporation method
- a second antenna is formed by a plating method, thereby forming a laminated antenna. It is preferable to form the antenna by a droplet discharge method or a printing method since a conductive film need not be patterned, thereby reducing the number of manufacturing steps.
- thin film transistors 128n and 128p each having an insulating film, a semiconductor film 124 patterned into a desired shape, a gate insulating film 125, and a gate electrode 126, are formed over the insulating substrate 100 with a separation layer 102 therebetween.
- a wiring 130 is provided to connect to an impurity region included in the semiconductor film.
- the insulating film may have a laminated structure.
- the insulating film has a first insulating film 121, a second insulating film 122, and a third insulating film 123 as in Embodiment 1.
- 131 may be provided to cover the wiring 130.
- FIG. 10B is a cross-sectional view of line e-f from FIG. 10A
- FIG. 10C is a cross-sectional view of line g-h from FIG. 10A, which crosses the connection region 106.
- a gas or liquid containing halide typified by C1F 3
- C1F 3 chlorine trifluoride
- a processing temperature is in the range of 100 °C to 300 °C, a reaction rate can be increased. Consequently, the consumption of a C1F 3 gas can be reduced and processing time can be shortened.
- a substrate made of a synthetic resin such as plastic as described above or acrylic can be used as the flexible substrate.
- a substrate made of plastic is used.
- a thermosetting resin, an ultraviolet curing resin, an epoxy resin, a resin additive, two-sided tape, or the like can be used as the adhesive.
- the breaking strength of the IDF chip can be increased by transferring the IDF chip to the flexible substrate.
- the IDF chip is mounted with the use of an anisotropic conductor in a "face-down” manner, where the connection terminal of the IDF chip faces the antenna, as described; however, the IDF chip may also be mounted in a "face-up” manner, where the connection terminal faces in the opposite direction to the antenna, as in
- a thin film transistor is formed over the insulating substrate 100, and the insulating substrate 100 is then separated. Preferably, the thin film transistor is further transferred to a flexible substrate. However, the timing of or the number of separations performed is not limited to this embodiment.
- the thin film transistor may be mounted on an article (mount article) without transferring the thin film transistor to the flexible substrate. The mounting of the IDF chip in a "face-up" or
- a side wall 76 can be formed in a self-aligned manner as shown in FIG. 25B.
- a mixed gas of CHF 3 and He is used as an etching gas.
- the insulating film on the back is preferably etched and removed (back treatment) using the resist 44 as a mask.
- a method for forming the side wall 76 is not limited to the above. For example, methods shown in FIGS. 26A and 26B can be used. FIG.
- the side wall functions as a mask when forming a low concentration impurity region or an undoped off-set region in the lower part of the side wall 76 by doping high concentration of n-type impurities. In either method of forming the side wall described above, etchback conditions can be set in accordance with the width of a low concentration impurity region or an off-set region to be formed. [0176] Subsequently, as shown in FIG.
- the wiring 130 connected to the TFTs is to have a five-layer structure of Ti, TiN, Al-Si, Ti, and TiN, and is formed by a sputtering method and then patterned.
- Si When Si is mixed into the Al layer, the occurrence of hillocks can be prevented while resist baking during wiring patterning. Instead of Si, Cu of approximately 0.5 % may be mixed as well. The occurrence of hillocks can be further suppressed by sandwiching the Al-Si layer between Ti and TiN. Note that it is desirable to use a mask formed of an inorganic material such as SiON in patterning. A material and a forming method of the wiring are not limited thereto. The above-described material which is used for the gate electrode may be employed.
- Embodiment 4 A method for manufacturing a thin film integrated circuit, which is different from the modes described in Embodiments 1 and 2, is described in this embodiment.
- IDF chips integrated by a connection region 106 is prepared according to Embodiment Mode 2 or Embodiment 2.
- the IDF chips are provided with bumps 201 which are formed of the same material as a wiring 130.
- a second substrate 202 provided with wirings 203 is prepared.
- a substrate made of glass such as barium borosilicate glass or alumino borosilicate glass; a quartz substrate; or the like can be used.
- the IDF chips may be attached with the use of an ultrasonic adhesive, an ultraviolet curing resin, two-sided tape, or the like.
- the IDF chips are cut by a dicing, scribing, or laser cutting method.
- an antenna terminal 205 is formed as shown in FIG. 14D.
- the antenna terminal can be formed by a droplet discharge method, a sputtering method, a CVD method, or the like.
- an antenna substrate 111 provided with an antenna 112, is attached to the IDF chip, as shown in FIG. 14E.
- an IDF chip is attached to a flexible substrate 150 by an adhesive 151.
- a thermosetting resin, an ultraviolet curing resin, an epoxy resin, a resin additive, two-sided tape, or the like can be used as the adhesive.
- the IDF chip 602 can be mounted on the bottom or the side of the bag as shown in FIG. 27. Since the IDF chip is extremely thin and small, it can be mounted while maintaining the attractive design of the bag. In addition, the IDF chip is light transmitting; thus, it cannot be easily recognized by a thief. Accordingly, there is no fear that the ID chip will be removed by a thief. [0213] In the case where such a bag mounted with an IDF chip is stolen, information on the actual location of the bag can be obtained by using, for example, a GPS (Global Positioning System).
- GPS Global Positioning System
- FIG. 16C shows a stock certificate 321 mounted with an IDF chip.
- IDF chip 322 is fixed inside the stock certificate in FIG. 16C, it may also be provided on the surface thereof.
- the size, the shape, and the mounting position of the IDF chip are not exclusively limited.
- the ID chip may be made larger in the case of including a large amount of information. Even in such a case, the IDF chip is light transmitting; therefore, it does not disturb printing wherever it is mounted.
- Such an application may also be stored in a rewritable and erasable memory such as an EEROM.
- the IDF chip can be used in combination with other information media such as a bar code and a magnetic tape.
- other information media such as a bar code and a magnetic tape.
- basic information which is unnecessary to rewrite may be stored in the IDF chip, and information to be renewed, for example, information on discount price and special price may be stored in a bar code. This is because information in the bar code can be easily changed, unlike the IDF chip.
- Mounting the IDF chip in this manner can increase the amount of information given to consumers; thus, consumers can purchase products with ease.
- an interposed position of the IDF chip (center of the IDF chip) X may be set to satisfy (l/2)-D-30 ⁇ m ⁇ X ⁇ (l/2)-D+30 ⁇ m.
- the IDF chip is preferably placed in the above position.
- stress on the semiconductor layer can be relieved and the occurrence of cracks can be prevented when the IDF chip is placed at the center of the article and the semiconductor layer is placed at the center of the IDF chip.
- the IDF chip and the antenna may be separately mounted on the article. There is no limitation on a mounting area and the degree of freedom for design is increased when the IDF chip and the antenna are mounted on different faces.
- the antenna in this case can be directly mounted on the article. Thereafter, the connection terminal of the antenna is joined to a connection terminal of the IDF chip. At this time, they can be joined to each other with an anisotropic conductor.
- FIG. 19A shows a banknote 301 which is a IDF chip mount article and is bent in the arrow direction 280.
- a thin film material easily bends or can be easily bent in the longitudinal direction; accordingly, the case of bending in the longitudinal direction will be described in this embodiment.
- FIG. 19B An IDF chip 104 in such a state is shown in FIG. 19B.
- the IDF chip has a plurality of thin film transistors 230 and the thin film transistors are ananged so that a carrier flow direction 281 and the arrow direction (bending direction) 280 are perpendicular.
- a source region 230(s), a channel forming region 230(c), and a drain region 230(d) of each thin film transistor are arranged so as to be perpendicular to the bending direction 280.
- damage or separation due to bending stress of the thin film transistor can be prevented.
- a laser scanning direction 283 is also set so as to be perpendicular to the bending direction 280.
- the laser scanning direction 283 (major axis side) is set perpendicular to the bending direction 280.
- the IDF chip By bending the IDF chip in such a direction, the IDF chip, particularly, a thin film transistor is not damaged. Further, the grain boundaries in the direction of the carrier flow can be reduced to a minimum. Consequently, the electrical characteristics of the thin film transistors, particularly, the mobility can be improved.
- damage or separation due to bending stress of the thin film transistor can be prevented by making a ratio of an area of the patterned semiconductor film in the IDF chip 1 % to 30 %.
- the contactless IDF chip is described in this embodiment; however, it may be either a contact IDF chip or a hybrid IDF chip.
- FIG. 18 A shows information flow through a medicine bottle 401 equipped with an
- IDF chip 402 attached to a label 403, a reader/writer 410, a personal computer 420 having a display portion 421, and the like.
- Information in the IDF chip for example, a dose, an effect, a side effect, allergy, and the like is inputted into the personal computer through the reader/writer, and the information can be confirmed on the display portion 421.
- the IDF chip may include information such as business advertisement, for example, a home page address. In that case, an Internet browser is activated and the address is inputted through the reader/writer; then, the homepage can be seen. By reading information recorded in an IDF chip, an input error can be avoided as compared with the case where the information is inputted manually.
- the information on medicine can be read with the use of a portable electronic device having a function of a reader/writer, typified by a cellular phone or a PDA.
- a coil serving as an antenna 431 of a cellular phone 430 is designed to serve also as an antenna of a reader/writer.
- the information recorded in the IDF chip can be confirmed on a display portion 432 of the cellular phone.
- the memory can be used as an operation area in processing. Thereafter, signal transmission between the microprocessor and a signal interface 519 can be performed. Further, a power source 518 for such mutual signal exchange is provided. [0260]
- the microprocessor 516, the memory 517, and the signal interface 519 can be provided in a personal computer or a telephone itself.
- the reader/writer may have an anti-collision function.
- an electronic device such as a cellular phone which also serves as a reader/writer may include an antenna coil 511, a modulation circuit 512, an oscillating means 513, a detection demodulation circuit 514, a gate ASIC 515, a microprocessor 516, a memory 517, a power source 518, and a signal interface 519.
- the circuits above and the like can be formed in a personal computer to provide a reader/writer function.
- a signal transmitted from the gate ASIC 515 as electric waves through the modulation circuit 512 is converted into an AC electrical signal by electromagnetic induction in the antenna coil 501.
- the AC electrical signal is demodulated in the demodulation circuit 503 and transmitted to the microprocessor 506. Further, power supply voltage is generated with the use of the AC electrical signal in the rectifier circuit 505, and supplied to the microprocessor 506. [0265] In the microprocessor 506, a variety of processing is performed in accordance with inputted signals.
- the memory 507 can be used not only for storing a program, data and the like used in the microprocessor 506 but also as an operation area in processing.
- a signal transmitted from the microprocessor 506 to the modulation circuit 504 is modulated into an AC electrical signal.
- the switch 508 can apply a load to the antenna coil 501 in accordance with the AC electrical signal from the modulation circuit 504.
- the reader/writer receives the load applied to the antenna coil 501 by electric waves, thereby consequently reading a signal from the microprocessor 506.
- the circuit configurations of the IDF chip and the reader/writer shown in FIG. 18B is only an example, and the present invention is not limited thereto.
- a method for transmitting a signal is not limited to the electromagnetic induction method shown in this embodiment.
- An electromagnetic coupling method, a microwave method, or other transmitting methods may also be adopted.
- an IDF chip of the present invention may have a function such as a GPS.
Abstract
Description
Claims
Priority Applications (4)
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KR1020067017025A KR101127888B1 (en) | 2004-02-06 | 2005-01-27 | Method for manufacturing thin film integrated circuit, and element substrate |
US10/587,744 US7632721B2 (en) | 2004-02-06 | 2005-01-27 | Method for manufacturing thin film integrated circuit, and element substrate |
US12/613,650 US7968386B2 (en) | 2004-02-06 | 2009-11-06 | Method for manufacturing thin film integrated circuit, and element substrate |
US13/101,400 US8685835B2 (en) | 2004-02-06 | 2011-05-05 | Method for manufacturing thin film integrated circuit, and element substrate |
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JP2004-031064 | 2004-02-06 | ||
JP2004031064 | 2004-02-06 |
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US11/587,744 A-371-Of-International US20080140036A1 (en) | 2004-04-27 | 2005-01-18 | Antimicrobial Composition |
US12/613,650 Division US7968386B2 (en) | 2004-02-06 | 2009-11-06 | Method for manufacturing thin film integrated circuit, and element substrate |
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WO2005076358A1 true WO2005076358A1 (en) | 2005-08-18 |
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US (3) | US7632721B2 (en) |
KR (1) | KR101127888B1 (en) |
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KR101137797B1 (en) | 2003-12-15 | 2012-04-20 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | Method for manufacturing thin film integrated circuit device, noncontact thin film integrated circuit device and method for manufacturing the same, and idtag and coin including the noncontact thin film integrated circuit device |
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Also Published As
Publication number | Publication date |
---|---|
US7968386B2 (en) | 2011-06-28 |
US20110212575A1 (en) | 2011-09-01 |
CN1914735A (en) | 2007-02-14 |
TW200539250A (en) | 2005-12-01 |
US20070161159A1 (en) | 2007-07-12 |
KR20060135773A (en) | 2006-12-29 |
CN100502018C (en) | 2009-06-17 |
TWI375250B (en) | 2012-10-21 |
US7632721B2 (en) | 2009-12-15 |
US20100059748A1 (en) | 2010-03-11 |
US8685835B2 (en) | 2014-04-01 |
KR101127888B1 (en) | 2012-03-21 |
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