USH416H - High capacitance flexible circuit - Google Patents

High capacitance flexible circuit Download PDF

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Publication number
USH416H
USH416H US06/864,821 US86482186A USH416H US H416 H USH416 H US H416H US 86482186 A US86482186 A US 86482186A US H416 H USH416 H US H416H
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US
United States
Prior art keywords
flexible circuit
capacitor
assembly
electrically conductive
comprised
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US06/864,821
Inventor
Kevin W. Colvin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rogers Corp
Original Assignee
Rogers Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rogers Corp filed Critical Rogers Corp
Priority to US06/864,821 priority Critical patent/USH416H/en
Application granted granted Critical
Publication of USH416H publication Critical patent/USH416H/en
Abandoned legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/02Details
    • H05K1/14Structural association of two or more printed circuits
    • H05K1/145Arrangements wherein electric components are disposed between and simultaneously connected to two planar printed circuit boards, e.g. Cordwood modules
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/02Details
    • H05K1/09Use of materials for the conductive, e.g. metallic pattern
    • H05K1/092Dispersed materials, e.g. conductive pastes or inks
    • H05K1/095Dispersed materials, e.g. conductive pastes or inks for polymer thick films, i.e. having a permanent organic polymeric binder
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/02Details
    • H05K1/14Structural association of two or more printed circuits
    • H05K1/147Structural association of two or more printed circuits at least one of the printed circuits being bent or folded, e.g. by using a flexible printed circuit
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/18Printed circuits structurally associated with non-printed electric components
    • H05K1/189Printed circuits structurally associated with non-printed electric components characterised by the use of a flexible or folded printed circuit
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/03Conductive materials
    • H05K2201/0332Structure of the conductor
    • H05K2201/0388Other aspects of conductors
    • H05K2201/0394Conductor crossing over a hole in the substrate or a gap between two separate substrate parts
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/05Flexible printed circuits [FPCs]
    • H05K2201/056Folded around rigid support or component
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007Types of components
    • H05K2201/10015Non-printed capacitor
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10613Details of electrical connections of non-printed components, e.g. special leads
    • H05K2201/10621Components characterised by their electrical contacts
    • H05K2201/10643Disc shaped leadless component
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/22Secondary treatment of printed circuits
    • H05K3/28Applying non-metallic protective coatings
    • H05K3/281Applying non-metallic protective coatings by means of a preformed insulating foil
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/46Manufacturing multilayer circuits
    • H05K3/4611Manufacturing multilayer circuits by laminating two or more circuit boards
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/46Manufacturing multilayer circuits
    • H05K3/4611Manufacturing multilayer circuits by laminating two or more circuit boards
    • H05K3/4626Manufacturing multilayer circuits by laminating two or more circuit boards characterised by the insulating layers or materials
    • H05K3/4635Manufacturing multilayer circuits by laminating two or more circuit boards characterised by the insulating layers or materials laminating flexible circuit boards using additional insulating adhesive materials between the boards

Definitions

  • the present invention relates to passive electronic devices and particularly to multilayer flexible circuits characterized by high capacitance. Specifically, the present invention is directed to flexible circuits having ceramic capacitors embedded therein and, in some applications, also including inductors connected to the capacitors.
  • a typical multilayer flexible circuit will be comprised of at least two non-conductive plastic sheets having conductive circuit patterns supported on at least one planar surface of each sheet. These sheets will customarily be positioned so that the circuit patterns face each other, but are not in electrical contact. Electrical isolation between the conductors patterns on the two sheets will usually be accomplished by spatially separating the sheets through the use of an intermediate nonconductive layer. This intermediate layer may either be a further plastic sheet, adhesively bonded to the circuit supporting sheets, or a nonconductive binder.
  • Prior flexible circuits have a capacitance which is so low as to be comparatively ineffective in any frequency sensitive circuit, such as a filter or network, noise.
  • the present invention overcomes the above-discussed disadvantages and other deficiencies of the prior art by embedding capacitive elements, at appropriate locations, within a multilayer flexible circuit.
  • a flexible circuit may be comprised of at least two plastic films or substrates which have a conductive circuit pattern disposed on at least one surface. These films are arranged so that the circuit patterns are facing, but not in contact with, each other. Capacitive elements are positioned between appropriate sections of the two circuit patterns and thus are sandwiched between the substrates. Preferrably, the entire circuit pattern is disposed on a single film which is then folded to define the multilayer device. These capacitive elements are comprised of chips or wafers of a material having a high dielectric constant with the two opposite surfaces of each chip being provided with a conductive coating.
  • the capacitive elements may be held in place by a conductive binder and the binder may also act as the conductive surface coating of the capacitors.
  • a spacer sheet comprised of a plastic film, may be provided with cut-outs for locating and retaining the capacitors in the proper position.
  • the flexible circuits i.e., the circuit patterns on the substrates, may include etched inductors which cooperate with the capacitive elements to form high pass, low pass or band pass filter circuits.
  • the present invention is suitable for use in keyboard switching assemblies, to add filtering or decoupling directly in a cable or flex package, to define tuned circuits for many applications, and for many other applications.
  • FIG. 1 is a cross-sectional side elevation view of a flexible circuit in accordance with the present invention
  • FIG. 2 is a perspective exploded view of a flexible circuit in accordance with the present invention.
  • FIG. 3 is a schematic plan view of a circuit in accordance with the invention, including inductive and capacitive circuit components, at an intermediate stage of fabrication.
  • Circuit 10 is comprised of two plastic layers 12 and 14.
  • Layers 12 and 14 may be of any suitable nonconductive material, such as Kapton® or Mylar®.
  • Conductor patterns 16 and 18 are respectively supported on the facing surfaces of layers 12 and 14.
  • Conductors 16 and 18 may be formed from any suitable conductive material and by any suitable method.
  • conductors 16 and 18 may be comprised of a copper foil which has been bonded to the respective surfaces of layers 12 and 14, with the desired pattern being formed by chemical etching subsequent to bonding.
  • conductors 16 and 18 might be formed by screen printing a conductive ink upon the respective surfaces of layers 12 and 14.
  • Element 20 is comprised of a chip or wafer of a material characterized by a high dielectric constant.
  • the two opposite surfaces of chip 22 are respectively provided with conductive coatings 26 and 28.
  • Chip 22 may be comprised of any suitable high dielectric material. Preferably, this material has a dielectric constant in excess of 3,000. This material will typically be a ceramic, such as barium titanate.
  • the conductive surfaces 26 and 28, i.e., the plates of the capacitor, may be comprised of any suitable material such as a conductive adhesive, tin or copper plating, or a paladium-silver plating.
  • Element 20 may have any desired dimension, depending upon the intended end use of the flexible circuit.
  • chip 22 will be approximately 10 mils thick and will range in width and length between approximately 0.150 to 0.200 inches.
  • Conductive coatings 26 and 28 will typically have a thickness of between 50 and 500 microinches.
  • Element 20 is retained between substrates 12 and 14 by any suitable method.
  • element 20 may be bonded between layers 12 and 14 with a conductive adhesive, which may also form conductive coatings 26 and 28.
  • a sheet of nonconductive material 21 will be positioned between substrates 12 and 14. This separator sheet 21 will have cut-outs for receiving the elements 20.
  • the flexible circuit 10 may also be hermetically sealed thus encapsulating element 20 within circuit 10. This protects both the conductors 16 and 18 and the capacitive elements 20 from environmental degradation.
  • Circuit 30 includes flexible plastic layers 32 and 34 having conductors 36 and 38 disposed on their respective facing surfaces. Conductors 36 and 38 are provided with portions 40 and 42, respectively, of enlarged area. Furthermore, layers 32 and 34 are provided with transversely extending termination portions 44 and 46 respectively. Conductors 36 and 38 extend into respective termination portions 44 and 46.
  • Capacitive elements 20 are positioned between layers 32 and 34. Elements 20 are the same as discussed above and require no further explanation. Furthermore, as also explained above, there are numerous methods of bonding or retaining elements 20 between layers 32 and 34.
  • Circuit 50 is deposited upon a nonconductive layer 52, usually a plastice.
  • Circuit 50 includes a coil 54, capacitor chip mounting areas 56 and 58, and conductive contact pads 60 and 61.

Abstract

A multilayer flexible circuit is provided with integral capacitors. These capacitors are in the form of rigid dielectric elements embedded within the flexible circuit at appropriate locations between two circuit patterns. The circuit pattern may include inductors which cooperate with the capacitors to provide filtering.

Description

This application is a continuation of application Ser. No. 297,987, filed Aug. 31, 1981, now abandoned.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to passive electronic devices and particularly to multilayer flexible circuits characterized by high capacitance. Specifically, the present invention is directed to flexible circuits having ceramic capacitors embedded therein and, in some applications, also including inductors connected to the capacitors.
2. Description of the Prior Art
Flexible circuits are well known and have been widely used. A typical multilayer flexible circuit will be comprised of at least two non-conductive plastic sheets having conductive circuit patterns supported on at least one planar surface of each sheet. These sheets will customarily be positioned so that the circuit patterns face each other, but are not in electrical contact. Electrical isolation between the conductors patterns on the two sheets will usually be accomplished by spatially separating the sheets through the use of an intermediate nonconductive layer. This intermediate layer may either be a further plastic sheet, adhesively bonded to the circuit supporting sheets, or a nonconductive binder.
Prior flexible circuits have a capacitance which is so low as to be comparatively ineffective in any frequency sensitive circuit, such as a filter or network, noise.
In order to overcome this disadvantageous low capacitance, discrete capacitors were often inserted into terminal holes in the circuit and soldered into place. This required additional assembly time and expense. Furthermore, the solder connections were subject to environmental degradation, and are typically points of higher resistance in the circuit.
SUMMARY OF THE PRESENT INVENTION
The present invention overcomes the above-discussed disadvantages and other deficiencies of the prior art by embedding capacitive elements, at appropriate locations, within a multilayer flexible circuit.
In accordance with the present invention, a flexible circuit may be comprised of at least two plastic films or substrates which have a conductive circuit pattern disposed on at least one surface. These films are arranged so that the circuit patterns are facing, but not in contact with, each other. Capacitive elements are positioned between appropriate sections of the two circuit patterns and thus are sandwiched between the substrates. Preferrably, the entire circuit pattern is disposed on a single film which is then folded to define the multilayer device. These capacitive elements are comprised of chips or wafers of a material having a high dielectric constant with the two opposite surfaces of each chip being provided with a conductive coating.
The capacitive elements may be held in place by a conductive binder and the binder may also act as the conductive surface coating of the capacitors. A spacer sheet, comprised of a plastic film, may be provided with cut-outs for locating and retaining the capacitors in the proper position. Alternatively, it is possible to mechanically secure the capacitive elements between the circuit patterns by any suitable means.
The flexible circuits, i.e., the circuit patterns on the substrates, may include etched inductors which cooperate with the capacitive elements to form high pass, low pass or band pass filter circuits.
The present invention is suitable for use in keyboard switching assemblies, to add filtering or decoupling directly in a cable or flex package, to define tuned circuits for many applications, and for many other applications.
BRIEF DESCRIPTION OF THE DRAWING
The present invention may be better understood and its numerous objects and advantages will become apparent to those skilled in the art by reference to the accompanying drawing wherein like reference numerals refer to like elements in the several FIGURES and in which:
FIG. 1 is a cross-sectional side elevation view of a flexible circuit in accordance with the present invention;
FIG. 2 is a perspective exploded view of a flexible circuit in accordance with the present invention; and
FIG. 3 is a schematic plan view of a circuit in accordance with the invention, including inductive and capacitive circuit components, at an intermediate stage of fabrication.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to FIG. 1, a flexible circuit in acccordance with the present invention is indicated generally at 10. Circuit 10 is comprised of two plastic layers 12 and 14. Layers 12 and 14 may be of any suitable nonconductive material, such as Kapton® or Mylar®. Conductor patterns 16 and 18 are respectively supported on the facing surfaces of layers 12 and 14. Conductors 16 and 18 may be formed from any suitable conductive material and by any suitable method. By way of example, conductors 16 and 18 may be comprised of a copper foil which has been bonded to the respective surfaces of layers 12 and 14, with the desired pattern being formed by chemical etching subsequent to bonding. Alternatively, conductors 16 and 18 might be formed by screen printing a conductive ink upon the respective surfaces of layers 12 and 14.
Positioned between the layers 12 and 14, and in contact with a desired section of conductors 16 and 18, is at least one capacitive element which has been indicated generally at 20. Element 20 is comprised of a chip or wafer of a material characterized by a high dielectric constant. The two opposite surfaces of chip 22 are respectively provided with conductive coatings 26 and 28.
Chip 22 may be comprised of any suitable high dielectric material. Preferably, this material has a dielectric constant in excess of 3,000. This material will typically be a ceramic, such as barium titanate. The conductive surfaces 26 and 28, i.e., the plates of the capacitor, may be comprised of any suitable material such as a conductive adhesive, tin or copper plating, or a paladium-silver plating.
Element 20 may have any desired dimension, depending upon the intended end use of the flexible circuit. Typically, chip 22 will be approximately 10 mils thick and will range in width and length between approximately 0.150 to 0.200 inches. Conductive coatings 26 and 28 will typically have a thickness of between 50 and 500 microinches.
Element 20 is retained between substrates 12 and 14 by any suitable method. By way of example, element 20 may be bonded between layers 12 and 14 with a conductive adhesive, which may also form conductive coatings 26 and 28. Preferrably, a sheet of nonconductive material 21 will be positioned between substrates 12 and 14. This separator sheet 21 will have cut-outs for receiving the elements 20. The flexible circuit 10 may also be hermetically sealed thus encapsulating element 20 within circuit 10. This protects both the conductors 16 and 18 and the capacitive elements 20 from environmental degradation.
Referring now to FIG. 2, an exploded view of an embodiment of a flexible circuit in accordance with the present invention is indicated generally at 30. Circuit 30 includes flexible plastic layers 32 and 34 having conductors 36 and 38 disposed on their respective facing surfaces. Conductors 36 and 38 are provided with portions 40 and 42, respectively, of enlarged area. Furthermore, layers 32 and 34 are provided with transversely extending termination portions 44 and 46 respectively. Conductors 36 and 38 extend into respective termination portions 44 and 46.
Capacitive elements 20 are positioned between layers 32 and 34. Elements 20 are the same as discussed above and require no further explanation. Furthermore, as also explained above, there are numerous methods of bonding or retaining elements 20 between layers 32 and 34.
It is also possible to incorporate into a circuit of the present invention an etched inductor or inductors to cooperate with elements 20 to define a filter or filters. One illustration of such a circuit is seen generally at 50 in FIG. 3. Circuit 50 is deposited upon a nonconductive layer 52, usually a plastice. Circuit 50 includes a coil 54, capacitor chip mounting areas 56 and 58, and conductive contact pads 60 and 61. By folding layer 52, along line 62, the pads 60 and 61 and placed in electrical contact with contact points 63 and 64, respectively, to complete the circuit.
While preferred embodiments have been shown and described, various modifications and substitutions may be made thereto without departing from the spirit and scope of the invention. Accordingly, it is to be understood that the present invention has been described by way of illustration and not limitation.

Claims (9)

What is claimed is:
1. A high capacitance flexible circuit comprising:
a first flexible circuit sheet, said first flexible circuit sheet having first and second sides, said second side having a defined electrically conductive pathway means disposed thereon;
a second flexible circuit sheet, said second flexible circuit sheet having first and second sides, said first side having a defined electrically conductive pathway means disposed thereon, said first side facing but not in contact with said second side of said first flexible circuit sheet; and
at least one capacitor chip, said capacitor chip comprising a generally rectangular flat wafer of dielectric material disposed between a pair of oppositely disposed planar conductive outer surfaces, said capacitor being positioned between said first and second flexible circuit sheets, said conductive outer surfaces of said capacitor chip being in electrical contact with appropriate sections of said electrically conductive pathway means on said first and second flexible circuit sheets.
2. The assembly of claim 1 wherein said capacitor is comprised of a dielectric material having a dielectric constant of at least 3,000.
3. The assembly of claim 1 wherein said electrically conductive pathway of said first circuitry layer includes an inductor.
4. The assembly of claim 1 wherein said electrically conductive pathway is comprised of a copper foil etched circuit pattern.
5. The assembly of claim 1 wherein said electrically conductive pathway is comprised of conductive ink.
6. The assembly of claim 1 wherein said capacitor is comprised of a ceramic wafer having a width and length ranging between 0.150 to 0.200 inches.
7. The assembly of claim 6 wherein said planar conductive outer surfaces of said capacitor have a thickness ranging between 50 to 500 microinches.
8. The assembly of claim 1 further including:
a spacer layer of flexible insulating material, said spacer layer being positioned between said first and second flexible circuit sheets, said spacer layer being provided with cut-outs for receiving said capacitor.
9. A high capacitance flexible circuit assembly comprising:
a flexible circuitry layer, said layer having first and second sides, said second side having two defined electrically conductive pathways disposed thereon, said pathways being spatially separated so as to form a longitudinal section running between them the length of said circuitry layer, said circuitry layer being folded along a line through said longitudinal section so as to position said two defined electrically conductive pathways to face but not contact each other; and
at least one capacitor, said capacitor comprising a generally rectangular flat wafer of dielectric material disposed between a pair of oppositely disposed planar conductive outer surfaces, said capacitor being positioned within said folded flexible circuit layer, said conductive outer surfaces of said capacitor being in electrical contact with appropriate sections of said defined electrical conductive pathways.
US06/864,821 1981-08-31 1986-05-19 High capacitance flexible circuit Abandoned USH416H (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US06/864,821 USH416H (en) 1981-08-31 1986-05-19 High capacitance flexible circuit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US29798781A 1981-08-31 1981-08-31
US06/864,821 USH416H (en) 1981-08-31 1986-05-19 High capacitance flexible circuit

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US29798781A Continuation 1981-08-31 1981-08-31

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USH416H true USH416H (en) 1988-01-05

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4903113A (en) * 1988-01-15 1990-02-20 International Business Machines Corporation Enhanced tab package
US5083383A (en) * 1989-03-21 1992-01-28 Zircon International, Inc. Electronic capacitance level with automatic electrode selection
EP0574207A2 (en) * 1992-06-08 1993-12-15 Nippon CMK Corp. Multilayer printed circuit board and method for manufacturing the same
US5780375A (en) * 1993-10-19 1998-07-14 E. I. Du Pont De Nemours And Company Thick film composition for modifying the electrical properties of a dielectric layer
US6040038A (en) * 1996-11-22 2000-03-21 Mitsubishi Shindoh Co., Ltd. Film condenser and metalized film
US6150614A (en) * 1996-12-20 2000-11-21 Robert Bosch Gmbh Conducting foil for conductively connecting electric and/or electronic components
WO2004016056A1 (en) * 2002-08-08 2004-02-19 Advanced Digital Broadcast Polska Sp. Z O.O Printed circuit board and electronic elements for mounting in printed circuit board and method for mounting electronic elements in printed circuit board
US20050018495A1 (en) * 2004-01-29 2005-01-27 Netlist, Inc. Arrangement of integrated circuits in a memory module
US20060097367A1 (en) * 2004-04-01 2006-05-11 Agere Systems Inc. Integrated circuit device having flexible leadframe
US20070080587A1 (en) * 2005-09-29 2007-04-12 Welch Allyn, Inc. Galvanic isolation of a signal using capacitive coupling embeded within a circuit board
US7323928B1 (en) 2003-04-11 2008-01-29 Linear Technology Corporation High capacitance integrated circuits
US11791597B2 (en) * 2021-02-05 2023-10-17 Aptiv Technologies (2) S.À R.L. Flexible electrical bus bar and method of manufacturing the same

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4903113A (en) * 1988-01-15 1990-02-20 International Business Machines Corporation Enhanced tab package
US5083383A (en) * 1989-03-21 1992-01-28 Zircon International, Inc. Electronic capacitance level with automatic electrode selection
EP0574207A2 (en) * 1992-06-08 1993-12-15 Nippon CMK Corp. Multilayer printed circuit board and method for manufacturing the same
EP0574207A3 (en) * 1992-06-08 1994-01-12 Nippon CMK Corp. Multilayer printed circuit board and method for manufacturing the same
US5780375A (en) * 1993-10-19 1998-07-14 E. I. Du Pont De Nemours And Company Thick film composition for modifying the electrical properties of a dielectric layer
US6040038A (en) * 1996-11-22 2000-03-21 Mitsubishi Shindoh Co., Ltd. Film condenser and metalized film
US6251503B1 (en) 1996-11-22 2001-06-26 Mitsubishi Shindoh Co., Ltd. Film condenser and metalized film
US6150614A (en) * 1996-12-20 2000-11-21 Robert Bosch Gmbh Conducting foil for conductively connecting electric and/or electronic components
WO2004016056A1 (en) * 2002-08-08 2004-02-19 Advanced Digital Broadcast Polska Sp. Z O.O Printed circuit board and electronic elements for mounting in printed circuit board and method for mounting electronic elements in printed circuit board
US7323928B1 (en) 2003-04-11 2008-01-29 Linear Technology Corporation High capacitance integrated circuits
US20050018495A1 (en) * 2004-01-29 2005-01-27 Netlist, Inc. Arrangement of integrated circuits in a memory module
US20060097367A1 (en) * 2004-04-01 2006-05-11 Agere Systems Inc. Integrated circuit device having flexible leadframe
US7541220B2 (en) * 2004-04-01 2009-06-02 Agere Systems Inc. Integrated circuit device having flexible leadframe
US20070080587A1 (en) * 2005-09-29 2007-04-12 Welch Allyn, Inc. Galvanic isolation of a signal using capacitive coupling embeded within a circuit board
US7483274B2 (en) 2005-09-29 2009-01-27 Welch Allyn, Inc. Galvanic isolation of a signal using capacitive coupling embedded within a circuit board
US11791597B2 (en) * 2021-02-05 2023-10-17 Aptiv Technologies (2) S.À R.L. Flexible electrical bus bar and method of manufacturing the same

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