WO2005086533A1 - エレクトレットコンデンサーマイクロフォン - Google Patents
エレクトレットコンデンサーマイクロフォン Download PDFInfo
- Publication number
- WO2005086533A1 WO2005086533A1 PCT/JP2005/001765 JP2005001765W WO2005086533A1 WO 2005086533 A1 WO2005086533 A1 WO 2005086533A1 JP 2005001765 W JP2005001765 W JP 2005001765W WO 2005086533 A1 WO2005086533 A1 WO 2005086533A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- film
- electret
- silicon nitride
- air gap
- electret capacitor
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R19/00—Electrostatic transducers
- H04R19/01—Electrostatic transducers characterised by the use of electrets
- H04R19/016—Electrostatic transducers characterised by the use of electrets for microphones
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81C—PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS
- B81C1/00—Manufacture or treatment of devices or systems in or on a substrate
- B81C1/00912—Treatments or methods for avoiding stiction of flexible or moving parts of MEMS
- B81C1/0092—For avoiding stiction during the manufacturing process of the device, e.g. during wet etching
- B81C1/00944—Maintaining a critical distance between the structures to be released
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R19/00—Electrostatic transducers
- H04R19/005—Electrostatic transducers using semiconductor materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B2201/00—Specific applications of microelectromechanical systems
- B81B2201/02—Sensors
- B81B2201/0257—Microphones or microspeakers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81C—PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS
- B81C2201/00—Manufacture or treatment of microstructural devices or systems
- B81C2201/11—Treatments for avoiding stiction of elastic or moving parts of MEMS
- B81C2201/112—Depositing an anti-stiction or passivation coating, e.g. on the elastic or moving parts
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/003—Mems transducers or their use
Definitions
- the present invention relates to an electret capacitor having a vibrating electrode and a fixed electrode, and in particular to an electret capacitor formed using MEMS (Micro Electro Mechanical Systems) technology.
- MEMS Micro Electro Mechanical Systems
- an electret capacitor that is a dielectric having permanent electric polarization, which is applied to elements such as a condenser microphone, an electret film and an electret film between a fixed electrode and a movable electrode that constitute a parallel plate capacitor.
- Structures with an air gap (cavity) layer have been used.
- the thickness of the air gap layer is directly related to the capacitance value of the condenser, and greatly affects the performance of the microphone and the like. That is, when the air gap layer is set thin, the sensitivity of the microphone etc. is improved. On the other hand, when the manufacturing variation of the thickness of the air gap layer is large, the sensitivity variation of the individual microphones and the like increases. Therefore, for the air gap layer provided in the electret capacitor, it is desirable that the thickness be small and the manufacturing variation of the thickness be small.
- Patent Document 1 a technology in which a concave portion is formed by removing a part of a Si (silicon) substrate by wet etching using potassium hydroxide.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2002-345088
- an electret capacitor having a fixed electrode and a movable electrode using MEMS technology.
- Wet etching is used between the fixed electrode and the movable electrode to form an air gap. If the fixed electrode and the movable electrode are stuck due to the surface tension of the etching solution or the cleaning solution during formation, the air gap layer having the desired thickness can not be formed. There is.
- the present invention prevents sticking of electrodes when forming an air gap in an electret capacitor, so that the thickness of the air gap layer can be accurately controlled.
- the purpose is to
- an electret capacitor according to the present invention comprises a first film having a first electrode, a second film having a second electrode and an electret film, and the first film.
- a first insulating film formed between the first film and the second film, and an air gap formed by removing a portion of the first insulating film, the first film and the A portion exposed to the air gap in each of the two films is formed of a second insulating film.
- the present invention it is possible to realize a highly reliable, compact and high-performance microphone. Furthermore, various application devices equipped with the microphone can be widely supplied to the society.
- FIG. 1 (a) and 1 (b) are configuration diagrams of an electret condenser microphone (hereinafter referred to as ECM) according to an embodiment of the present invention, and FIG. 1 (a) is a diagram showing the same.
- FIG. 1 (b) is a cross-sectional view of the ECM.
- FIG. 2 is a circuit block diagram of an ECM according to an embodiment of the present invention.
- FIG. 3 is a cross-sectional view of an electret capacitor constituting an ECM according to an embodiment of the present invention.
- FIG. 4 is a plan view of the lower electrode and the lead-out wiring of the electret capacitor constituting the ECM according to one embodiment of the present invention.
- FIG. 5 is a plan view of a silicon nitride film in a fixed film of an electret capacitor constituting an ECM according to an embodiment of the present invention.
- ECM which is an element to which the electret capacitor of the present embodiment is applied.
- FIG. 1 (a) and 1 (b) are block diagrams of the ECM of the present embodiment
- FIG. 1 (a) is a plan view of the ECM
- FIG. 1 (b) is a cross-sectional view of the ECM. It is.
- the ECM according to the present embodiment includes an electret capacitor 18, an SMD (surface mounted component) such as a capacitor 19 and an FET (field effect) on a printed circuit board 21. It is comprised by mounting the type
- FIG. 1 (a) the printed board 21 on which the electret capacitor 18, the SMD 19 and the FET portion 20 are mounted is protected by the case 22. ing.
- FIG. 2 is a circuit block diagram of an ECM of the present embodiment.
- the internal circuit 23 of the ECM of this embodiment is configured of an electret capacitor 18, an SMD 19 and an FET unit 20 which are electret capacitors of this embodiment described later. Further, signals are output from the output terminal 24 and the output terminal 25 of the internal circuit 23 to the external terminal 26 and the external terminal 27.
- a signal having a voltage of about 2 V for example, is input from the terminal 28 connected to the external terminal 26 via a resistor, the number of terminals is connected to the terminal 29 connected to the external terminal 26 via a capacitor.
- a signal with an alternating voltage of 10 mV is output.
- the external terminal 27 and a terminal 30 connected thereto Each is connected to an output terminal 25 which is a GND terminal in the ECM internal circuit 23.
- FIG. 3 is a cross-sectional view of the electret condenser of the present embodiment.
- the electret capacitor 1 of the present embodiment covers the membrane region 113 on the semiconductor substrate 101 having the region (hereinafter referred to as the membrane region 113) removed so as to leave the peripheral portion. It has a parallel plate capacitor structure in which the vibrating film 112 thus formed and the fixed film 110 disposed with the air gap 109 interposed between the vibrating film 112 are electrodes.
- the vibrating film 112 has a lower electrode 104 and the fixed film 110 has a conductive film (upper electrode) 118.
- a silicon oxide film 102 is formed on a semiconductor substrate 101 on which the electret capacitor of the present embodiment is mounted, and the semiconductor substrate 101 and the silicon oxide film 102 have their respective peripheral edges.
- the membrane region 113 is formed by partially removing the portion so that the portion remains. That is, the membrane area 113 is an area where the semiconductor substrate 101 is partially removed so as to leave its peripheral portion in order to allow the vibrating membrane 112 to vibrate by receiving pressure from the outside.
- a silicon nitride film 103 is formed on the silicon oxide film 102 so as to cover the membrane region 113.
- the lower electrode 104 and the lead-out wiring 115 made of the same conductive film are formed on the silicon nitride film 103 covering the membrane area 113 and the area near the membrane area 113 (a part of the outer area of the membrane area 113), and the lead wire 115 is a silicon nitride film outside the membrane area 113. It is formed on the membrane 103 to be connected to the lower electrode 104 !.
- a silicon oxide film 105 and a silicon nitride film 106 are sequentially formed on the silicon nitride film 103, the lower electrode 104 and the lead-out wiring 115.
- a vibrating film 112 is formed by the silicon nitride film 103, the lower electrode 104 made of a conductive film, the silicon oxide film 105, and the silicon nitride film 106 located in the membrane region 113. Further, in the vibrating film 112, a plurality of leak holes 107 connected to the air gap 109 are formed.
- the silicon nitride film 103 and the silicon nitride film 106 include the inner wall surface of the leak hole 107.
- the lower electrode 104 and the silicon oxide film 105 are formed to cover the entire surface.
- the silicon oxide film 105 is an electret film storing charges.
- the conductive film 118 covered by the lower silicon nitride film 114 and the upper silicon nitride film 119 is provided above the vibrating film 112, ie, above the silicon nitride film 106.
- the fixed film 110 is provided.
- a silicon oxide film 108 is formed between the silicon nitride film 106 or the silicon oxide film 102 and the fixed film 110.
- the air gap 109 is formed over the area including at least the entire membrane area 113, and the fixed film 110 is supported by the silicon oxide film 108 above the vibrating film 112.
- the air gap 109 is formed by partially removing the silicon oxide film 108 formed on the semiconductor substrate 101 including the membrane region 113.
- portions of the fixed film 110 and the vibrating film 112 exposed to the air gaps 109 are silicon nitride films (fixed film 110
- the silicon nitride film 114 and the silicon nitride film 106 of the vibrating film 112 are structured.
- a plurality of acoustic holes 111 connected to the air gap 109 are formed in the fixed film 110 above the air gap 109. Further, an opening 116 is provided in the fixed film 110 including the silicon nitride film 114 and the silicon oxide film 108 so as to partially expose the lead wire 115.
- the lower electrode 104 is electrically connected to the gate of the FET unit 20 shown in FIG. 2 through the lead wire 115.
- the silicon nitride film 119 constituting the fixed film 110 is provided with the opening 117 and the conductive film 118 constituting the fixed film 110 is exposed at the opening 117, whereby the relevant film is concerned.
- the conductive film 118 is electrically connected to the GND terminal 25 of FIG.
- FIG. 4 is a plan view of the lower electrode 104 and the lead-out wiring 115 of the electret capacitor of the present embodiment.
- the lower electrode 104 and the lead wire 115 are made of the same conductive film.
- the lower electrode 104 is a membrane region 1.
- a plurality of leak holes 107 are formed in the peripheral portion of the lower electrode 104 while being formed in the inside of the reference numeral 13. Then, a lead wire 115 is formed to electrically connect the lower electrode 104 to the outside.
- the capacitance of the capacitor in the ECM is determined by the capacitance component that changes due to the vibration of the vibrating membrane and the capacitance component that does not change due to the vibration of the vibrating membrane.
- the capacitance component which does not change due to the vibration of the vibrating film is increased, which largely affects the performance of the ECM.
- the lower electrode 104 of the electret capacitor is provided inside the membrane area 113.
- the large area metal oxide semiconductor (MOS) capacitance consisting of the lower electrode 104, the silicon oxide film 102 and the semiconductor substrate 101 is eliminated.
- the parasitic capacitance can be made to be only a small-area MOS capacitance composed of the lead-out line 115, the silicon oxide film 102 and the semiconductor substrate 101. Therefore, since it is possible to prevent an increase in the invariable capacitance component (parasitic capacitance) in the capacitor, a compact and high performance electret capacitor can be realized.
- components of the vibrating film 112 that is, the silicon nitride film 103, the lower electrode 104 made of a conductive film, the silicon oxide film 105, and the silicon nitride film 106, the membrane region A silicon nitride film 103, a silicon oxide film 105 and a silicon nitride film 106 which are formed so as to cover 113 are formed so as to overlap with the semiconductor substrate 101.
- the ends of the silicon nitride film 103, the silicon oxide film 105 and the silicon nitride film 106 are located on the semiconductor substrate 101.
- the lower electrode 104 of the vibrating film 112 made of a conductive film is formed inside the membrane region 113 so as not to overlap with the semiconductor substrate 101.
- the end of the lower electrode 104 is located inside the membrane region 113.
- the resonance frequency characteristics of the vibrating film 112 can be controlled by adjusting the film thicknesses of the silicon nitride film 103, the silicon oxide film 105, and the silicon nitride film 106. That is, it facilitates control of the capacity component that changes in response to external force or pressure in the capacitor, thereby a compact and highly sensitive electret capacitor One can be realized.
- the silicon nitride film 103 and the silicon nitride film 106 are formed to cover the lower electrode 104 and the silicon oxide film 105.
- the charge of the electret is greatly reduced.
- at least the surface (upper surface, lower surface, and side surface) of the silicon oxide film 105 which is the electret is formed of the silicon nitride film 103 and the silicon nitride film 106 in order to suppress the reduction of the electret charge. Covering.
- the inner wall surface of the leak hole 107 is also completely covered with the silicon nitride film 106 so that the silicon oxide film (electret) 105 is not exposed in the leak hole 107 formed in the vibrating film 112.
- an electret condenser having an electret excellent in moisture resistance and heat resistance can be realized.
- FIG. 5 is a plan view of the silicon nitride film 114 that constitutes the fixed film 110 of the electret capacitor of the present embodiment.
- a plurality of acoustic holes 111 are formed in the fixed film 110 formed above the semiconductor substrate 101 including the membrane region 113.
- Each acoustic hole 111 is disposed in the membrane area 113 and its adjacent area (a part of the outer area of the membrane area 113).
- the electret condenser of the present embodiment when the vibrating membrane 112 receives an upward force also through the acoustic hole 111 and the air gap 109, the vibrating membrane 112 is mechanically operated according to the sound pressure. Vibrate up and down.
- the electret capacitor of the present embodiment has a parallel plate capacitor structure in which the lower electrode 104 in the vibrating film 112 and the conductive film 118 in the fixed film 110 are electrodes. Therefore, when the vibrating membrane 112 vibrates, the inter-electrode distance between the lower electrode 104 and the conductive film 118 changes, thereby changing the capacity (C) of the capacitor.
- the portion exposed to the air gap 109 in each of the fixed film 110 and the vibrating film 112 is an insulating film, specifically, a silicon nitride film (silicon nitride film 114 and silicon having tensile stress).
- the nitride film 106) force is also configured.
- the upper and lower sides of the silicon oxide film 108 provided with the air gap 109 are covered with the silicon nitride film. Therefore, it is possible to prevent the vibrating film 112 and the fixed film 110 from being stuck due to surface tension when the air gap 109 is formed.
- the thickness of the air gap 109 which determines the capacity of the capacitor in the formation region of the air gap 109, is a thin film formed by a semiconductor microfabrication technique or the like (in this embodiment, the silicon oxide film 108). Therefore, the air gap 109 having a desired thickness can be formed. Therefore, it is possible to realize an electret capacitor which is smaller in size, higher in performance, and smaller in individual characteristic variation.
- the present embodiment it is possible to realize a highly reliable, small and high-performance microphone. Furthermore, various application devices equipped with the microphone can be widely supplied to the society.
- the silicon nitride films (silicon nitride films 106 and 114) are used for the portions exposed to the air gaps 109 in each of the fixed film 110 and the vibrating film 112.
- other types of insulating films having tensile stress may be used.
- a conductive material constituting the lower electrode 104 silicon or polysilicon doped with an impurity, gold, a refractory metal, aluminum, an aluminum-containing alloy, or the like is used. You may use it.
- impurities are not included. Or doped silicon or polysilicon, gold, refractory metals, aluminum or aluminum-containing alloys, etc.
- a substrate made of an insulator instead of the semiconductor substrate 101, a substrate made of an insulator may be used.
- the silicon oxide film 108 is used as the insulating film (sacrificial layer) forming the air gap 109, but the type of the sacrificial layer is not particularly limited.
- the sacrificial layer a film in which a plurality of insulating films having the same material strength may be stacked may be used. In this way, the variation in the thickness of the sacrificial layer, that is, the variation in the thickness of the air gap can be reduced as compared with the case where the sacrificial layer of the same thickness is formed using a single insulating film. The characteristic variation of the capacitor can be further reduced.
- the present invention relates to an electret capacitor having a vibrating electrode and a fixed electrode, and in particular, when applied to an ECM or the like formed using MEMS technology, the ECM has high performance and high reliability. Yes, very useful.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/591,597 US7853027B2 (en) | 2004-03-05 | 2005-02-07 | Electret condenser |
EP05709817A EP1722595A4 (en) | 2004-03-05 | 2005-02-07 | ELECTRET condenser |
CN2005800063828A CN1926918B (zh) | 2004-03-05 | 2005-02-07 | 驻极体电容器 |
JP2006510623A JP4137158B2 (ja) | 2004-03-05 | 2005-02-07 | エレクトレットコンデンサーマイクロフォン |
US12/939,748 US8320589B2 (en) | 2004-03-05 | 2010-11-04 | Electret condenser |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004061987 | 2004-03-05 | ||
JP2004-061987 | 2004-03-05 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/591,597 A-371-Of-International US7853027B2 (en) | 2004-03-05 | 2005-02-07 | Electret condenser |
US12/939,748 Division US8320589B2 (en) | 2004-03-05 | 2010-11-04 | Electret condenser |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005086533A1 true WO2005086533A1 (ja) | 2005-09-15 |
Family
ID=34918094
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/001765 WO2005086533A1 (ja) | 2004-03-05 | 2005-02-07 | エレクトレットコンデンサーマイクロフォン |
Country Status (7)
Country | Link |
---|---|
US (2) | US7853027B2 (ja) |
EP (1) | EP1722595A4 (ja) |
JP (1) | JP4137158B2 (ja) |
KR (1) | KR20060129041A (ja) |
CN (1) | CN1926918B (ja) |
TW (1) | TW200531101A (ja) |
WO (1) | WO2005086533A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007107736A2 (en) | 2006-03-20 | 2007-09-27 | Wolfson Microelectronics Plc | Method for fabricating a mems microphone |
JP2008221398A (ja) * | 2007-03-13 | 2008-09-25 | Oki Electric Ind Co Ltd | 微小電気機械システムおよび微小電気機械システムの製造方法 |
WO2010079574A1 (ja) * | 2009-01-09 | 2010-07-15 | パナソニック株式会社 | Memsデバイス |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4181580B2 (ja) * | 2003-11-20 | 2008-11-19 | 松下電器産業株式会社 | エレクトレット及びエレクトレットコンデンサー |
US7706554B2 (en) * | 2004-03-03 | 2010-04-27 | Panasonic Corporation | Electret condenser |
EP1722596A4 (en) * | 2004-03-09 | 2009-11-11 | Panasonic Corp | ELECTRET CONDENSER MICROPHONE |
US8569850B2 (en) * | 2006-10-11 | 2013-10-29 | Sensfab Pte Ltd | Ultra low pressure sensor |
DE102006055147B4 (de) | 2006-11-03 | 2011-01-27 | Infineon Technologies Ag | Schallwandlerstruktur und Verfahren zur Herstellung einer Schallwandlerstruktur |
EP1931173B1 (en) | 2006-12-06 | 2011-07-20 | Electronics and Telecommunications Research Institute | Condenser microphone having flexure hinge diaphragm and method of manufacturing the same |
ATE510416T1 (de) * | 2007-12-17 | 2011-06-15 | Nxp Bv | Mems-mikrofon |
JPWO2009101757A1 (ja) * | 2008-02-14 | 2011-06-09 | パナソニック株式会社 | コンデンサマイクロホン及びmemsデバイス |
EP2145696A1 (en) | 2008-07-15 | 2010-01-20 | UAB Minatech | Capacitive micromachined ultrasonic transducer and its fabrication method |
JP2010155306A (ja) * | 2008-12-26 | 2010-07-15 | Panasonic Corp | Memsデバイス及びその製造方法 |
US8368153B2 (en) * | 2010-04-08 | 2013-02-05 | United Microelectronics Corp. | Wafer level package of MEMS microphone and manufacturing method thereof |
JP5400708B2 (ja) | 2010-05-27 | 2014-01-29 | オムロン株式会社 | 音響センサ、音響トランスデューサ、該音響トランスデューサを利用したマイクロフォン、および音響トランスデューサの製造方法 |
JP5588745B2 (ja) * | 2010-05-27 | 2014-09-10 | オムロン株式会社 | 音響トランスデューサ、および該音響トランスデューサを利用したマイクロフォン |
US9031266B2 (en) * | 2011-10-11 | 2015-05-12 | Infineon Technologies Ag | Electrostatic loudspeaker with membrane performing out-of-plane displacement |
US8842858B2 (en) | 2012-06-21 | 2014-09-23 | Invensense, Inc. | Electret condenser microphone |
US20140009379A1 (en) * | 2012-07-06 | 2014-01-09 | Qualcomm Mems Technologies, Inc. | Cavity liners for electromechanical systems devices |
DE102013217312B4 (de) | 2013-08-30 | 2016-06-30 | Robert Bosch Gmbh | Kapazitives MEMS-Bauelement mit einer druckempfindlichen Membran |
CN103826191B (zh) * | 2013-10-18 | 2017-01-11 | 杨仙君 | 一种压电驻极体传声器 |
CN103607687B (zh) * | 2013-11-29 | 2018-10-16 | 上海集成电路研发中心有限公司 | 一种mems麦克风缺陷监控结构及其制造方法 |
US9762992B2 (en) * | 2015-05-08 | 2017-09-12 | Kabushiki Kaisha Audio-Technica | Condenser microphone unit, condenser microphone, and method of manufacturing condenser microphone unit |
US10737931B2 (en) * | 2015-07-31 | 2020-08-11 | Taiwan Semiconductor Manufacturing Company Ltd. | Semiconductor structure and manufacturing method thereof |
KR102212575B1 (ko) * | 2017-02-02 | 2021-02-04 | 현대자동차 주식회사 | 마이크로폰 및 그 제조 방법 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001231099A (ja) * | 1999-12-09 | 2001-08-24 | Sharp Corp | 電気信号−音響信号変換器及びその製造方法並びに電気信号−音響変換装置 |
JP2001231098A (ja) * | 2000-02-15 | 2001-08-24 | Mitsubishi Electric Corp | マイクロフォン装置 |
JP2002027595A (ja) * | 2000-07-04 | 2002-01-25 | Nippon Hoso Kyokai <Nhk> | 圧力センサおよびその製造方法 |
JP2002518913A (ja) * | 1998-06-11 | 2002-06-25 | マイクロトロニック アクティーゼルスカブ | 所定張力を持つダイアフラムを有するトランスデューサを製造する方法 |
JP2002345088A (ja) * | 2001-05-18 | 2002-11-29 | Mitsubishi Electric Corp | 圧力感応装置及びこれに用いられる半導体基板の製造方法 |
JP2004356707A (ja) * | 2003-05-27 | 2004-12-16 | Hosiden Corp | 音響検出機構 |
Family Cites Families (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4861126A (ja) * | 1971-12-02 | 1973-08-27 | ||
SE398588B (sv) | 1977-03-23 | 1977-12-27 | Ericsson Telefon Ab L M | Temperaturstabil elektretmikrofon |
US4441038A (en) * | 1980-06-30 | 1984-04-03 | Tokyo Shibaura Denki Kabushiki Kaisha | Electret device |
CN2061748U (zh) | 1989-12-18 | 1990-09-05 | 赵唯 | 防水、防潮、长寿命驻极体膜片 |
US5490220A (en) * | 1992-03-18 | 1996-02-06 | Knowles Electronics, Inc. | Solid state condenser and microphone devices |
FR2695787B1 (fr) * | 1992-09-11 | 1994-11-10 | Suisse Electro Microtech Centr | Transducteur capacitif intégré. |
US5452268A (en) * | 1994-08-12 | 1995-09-19 | The Charles Stark Draper Laboratory, Inc. | Acoustic transducer with improved low frequency response |
US5573679A (en) * | 1995-06-19 | 1996-11-12 | Alberta Microelectronic Centre | Fabrication of a surface micromachined capacitive microphone using a dry-etch process |
JPH09283373A (ja) | 1996-04-15 | 1997-10-31 | Matsushita Electric Works Ltd | シリコン酸化膜エレクトレット |
AU2923397A (en) * | 1996-04-18 | 1997-11-07 | California Institute Of Technology | Thin film electret microphone |
CN2279929Y (zh) | 1997-01-16 | 1998-04-29 | 北京理工大学 | 固定于皮肤的驻极体复合膜 |
US5870482A (en) * | 1997-02-25 | 1999-02-09 | Knowles Electronics, Inc. | Miniature silicon condenser microphone |
AU5030100A (en) * | 1999-05-19 | 2000-12-05 | California Institute Of Technology | High performance mems thin-film teflon electret microphone |
JP3320685B2 (ja) * | 1999-06-02 | 2002-09-03 | 株式会社半導体先端テクノロジーズ | 微細パターン形成方法 |
JP3440037B2 (ja) * | 1999-09-16 | 2003-08-25 | 三洋電機株式会社 | 半導体装置、半導体エレクトレットコンデンサマイクロホンおよび半導体エレクトレットコンデンサマイクロホンの製造方法。 |
JP2002033241A (ja) | 2000-05-12 | 2002-01-31 | Uchitsugu Minami | シリコン酸化膜エレクトレット及びエレクトレットコンデンサマイクロホン |
KR200218653Y1 (ko) * | 2000-11-01 | 2001-04-02 | 주식회사비에스이 | 일렉트렛 콘덴서 마이크로폰 |
JP2002198370A (ja) * | 2000-12-26 | 2002-07-12 | Mitsubishi Electric Corp | 半導体装置および半導体装置の製造方法 |
JP2002209298A (ja) | 2001-01-11 | 2002-07-26 | Seiko Epson Corp | コンデンサマイクロホンの製造方法、コンデンサマイクロホンおよび電子機器 |
US6847090B2 (en) * | 2001-01-24 | 2005-01-25 | Knowles Electronics, Llc | Silicon capacitive microphone |
JP2002335599A (ja) | 2001-03-06 | 2002-11-22 | Sharp Corp | マイクロホンとその製造方法 |
JP2002315097A (ja) * | 2001-04-16 | 2002-10-25 | Mitsubishi Electric Corp | 圧力感応装置及びこれに用いられる半導体基板の製造方法 |
JP2002320294A (ja) | 2001-04-20 | 2002-10-31 | Mitsubishi Electric Corp | 半導体エレクトレットコンデンサマイクロホン |
US6859542B2 (en) | 2001-05-31 | 2005-02-22 | Sonion Lyngby A/S | Method of providing a hydrophobic layer and a condenser microphone having such a layer |
JP4532787B2 (ja) | 2001-07-19 | 2010-08-25 | 日本放送協会 | コンデンサ型マイクロホンおよび圧力センサ |
JP4697763B2 (ja) * | 2001-07-31 | 2011-06-08 | パナソニック株式会社 | コンデンサマイクロホン |
DE10160830A1 (de) * | 2001-12-11 | 2003-06-26 | Infineon Technologies Ag | Mikromechanische Sensoren und Verfahren zur Herstellung derselben |
JP2003223499A (ja) | 2002-01-31 | 2003-08-08 | Nextware Ltd | 施設機器管理システム |
JP2004166262A (ja) | 2002-10-23 | 2004-06-10 | Matsushita Electric Ind Co Ltd | 電気音響変換器及びその製造方法 |
US6928178B2 (en) * | 2002-12-17 | 2005-08-09 | Taiwan Carol Electronics Co., Ltd. | Condenser microphone and method for making the same |
JP4181580B2 (ja) * | 2003-11-20 | 2008-11-19 | 松下電器産業株式会社 | エレクトレット及びエレクトレットコンデンサー |
US7706554B2 (en) * | 2004-03-03 | 2010-04-27 | Panasonic Corporation | Electret condenser |
EP1722596A4 (en) * | 2004-03-09 | 2009-11-11 | Panasonic Corp | ELECTRET CONDENSER MICROPHONE |
-
2005
- 2005-02-07 US US10/591,597 patent/US7853027B2/en not_active Expired - Fee Related
- 2005-02-07 WO PCT/JP2005/001765 patent/WO2005086533A1/ja not_active Application Discontinuation
- 2005-02-07 EP EP05709817A patent/EP1722595A4/en not_active Withdrawn
- 2005-02-07 JP JP2006510623A patent/JP4137158B2/ja not_active Expired - Fee Related
- 2005-02-07 CN CN2005800063828A patent/CN1926918B/zh not_active Expired - Fee Related
- 2005-02-07 KR KR1020067017651A patent/KR20060129041A/ko not_active Application Discontinuation
- 2005-03-04 TW TW094106631A patent/TW200531101A/zh unknown
-
2010
- 2010-11-04 US US12/939,748 patent/US8320589B2/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002518913A (ja) * | 1998-06-11 | 2002-06-25 | マイクロトロニック アクティーゼルスカブ | 所定張力を持つダイアフラムを有するトランスデューサを製造する方法 |
JP2001231099A (ja) * | 1999-12-09 | 2001-08-24 | Sharp Corp | 電気信号−音響信号変換器及びその製造方法並びに電気信号−音響変換装置 |
JP2001231098A (ja) * | 2000-02-15 | 2001-08-24 | Mitsubishi Electric Corp | マイクロフォン装置 |
JP2002027595A (ja) * | 2000-07-04 | 2002-01-25 | Nippon Hoso Kyokai <Nhk> | 圧力センサおよびその製造方法 |
JP2002345088A (ja) * | 2001-05-18 | 2002-11-29 | Mitsubishi Electric Corp | 圧力感応装置及びこれに用いられる半導体基板の製造方法 |
JP2004356707A (ja) * | 2003-05-27 | 2004-12-16 | Hosiden Corp | 音響検出機構 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1722595A4 * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007107736A2 (en) | 2006-03-20 | 2007-09-27 | Wolfson Microelectronics Plc | Method for fabricating a mems microphone |
WO2007107736A3 (en) * | 2006-03-20 | 2009-09-11 | Wolfson Microelectronics Plc | Method for fabricating a mems microphone |
US7781249B2 (en) | 2006-03-20 | 2010-08-24 | Wolfson Microelectronics Plc | MEMS process and device |
US7856804B2 (en) | 2006-03-20 | 2010-12-28 | Wolfson Microelectronics Plc | MEMS process and device |
JP2008221398A (ja) * | 2007-03-13 | 2008-09-25 | Oki Electric Ind Co Ltd | 微小電気機械システムおよび微小電気機械システムの製造方法 |
US7829365B2 (en) | 2007-03-13 | 2010-11-09 | Oki Semiconductor Co., Ltd. | Micro electro-mechanical system and method of manufacturing the same |
WO2010079574A1 (ja) * | 2009-01-09 | 2010-07-15 | パナソニック株式会社 | Memsデバイス |
Also Published As
Publication number | Publication date |
---|---|
CN1926918B (zh) | 2011-06-01 |
KR20060129041A (ko) | 2006-12-14 |
JPWO2005086533A1 (ja) | 2007-08-09 |
US7853027B2 (en) | 2010-12-14 |
TW200531101A (en) | 2005-09-16 |
JP4137158B2 (ja) | 2008-08-20 |
EP1722595A1 (en) | 2006-11-15 |
US20110044480A1 (en) | 2011-02-24 |
US20070189555A1 (en) | 2007-08-16 |
EP1722595A4 (en) | 2010-07-28 |
CN1926918A (zh) | 2007-03-07 |
US8320589B2 (en) | 2012-11-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4137158B2 (ja) | エレクトレットコンデンサーマイクロフォン | |
JP4181580B2 (ja) | エレクトレット及びエレクトレットコンデンサー | |
US8237332B2 (en) | Piezoelectric acoustic transducer and method of fabricating the same | |
US8155355B2 (en) | Electret condenser microphone | |
JP4539450B2 (ja) | 容量型振動センサ及びその製造方法 | |
US8952468B2 (en) | Acoustic sensor, acoustic transducer, microphone using the acoustic transducer, and method for manufacturing the acoustic transducer | |
WO2011114398A1 (ja) | Memsデバイス | |
US9693149B2 (en) | Microphone and method for manufacturing the same | |
JP2008532370A (ja) | マイクロフォンダイアフラムおよびマイクロフォンダイアフラムを有するマイクロフォン | |
JP4244885B2 (ja) | エレクトレットコンデンサー | |
WO2006025211A1 (ja) | エレクトレットコンデンサーマイクロフォン | |
JP4419563B2 (ja) | エレクトレットコンデンサー | |
JP4775427B2 (ja) | コンデンサーマイクロフォン | |
JP2008167277A (ja) | 音響トランスデューサ | |
JP2006157777A (ja) | エレクトレットコンデンサ型マイクロホン | |
KR101472297B1 (ko) | 1칩형 mems 마이크로폰 및 그 제작 방법 | |
KR20150040839A (ko) | 압전형 음향 변환기 및 이의 제조방법 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200580006382.8 Country of ref document: CN |
|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2006510623 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020067017651 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 10591597 Country of ref document: US Ref document number: 2005709817 Country of ref document: EP Ref document number: 2007189555 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: DE |
|
WWP | Wipo information: published in national office |
Ref document number: 2005709817 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 10591597 Country of ref document: US |