WO2003086013A1 - Detecteur de capacites - Google Patents
Detecteur de capacites Download PDFInfo
- Publication number
- WO2003086013A1 WO2003086013A1 PCT/JP2003/004328 JP0304328W WO03086013A1 WO 2003086013 A1 WO2003086013 A1 WO 2003086013A1 JP 0304328 W JP0304328 W JP 0304328W WO 03086013 A1 WO03086013 A1 WO 03086013A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- conductive
- capacitor sensor
- fixed electrode
- conductive case
- case
- Prior art date
Links
- 239000003990 capacitor Substances 0.000 title claims abstract description 254
- 239000012528 membrane Substances 0.000 claims abstract description 88
- 239000010408 film Substances 0.000 claims description 73
- 239000000463 material Substances 0.000 claims description 45
- 125000006850 spacer group Chemical group 0.000 claims description 35
- 239000004744 fabric Substances 0.000 claims description 31
- 229910052751 metal Inorganic materials 0.000 claims description 24
- 239000002184 metal Substances 0.000 claims description 24
- 239000011347 resin Substances 0.000 claims description 23
- 229920005989 resin Polymers 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 17
- 239000002131 composite material Substances 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 239000004020 conductor Substances 0.000 claims description 6
- 239000010409 thin film Substances 0.000 claims description 6
- 239000011810 insulating material Substances 0.000 claims description 4
- 238000007639 printing Methods 0.000 claims description 4
- 239000012212 insulator Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 abstract description 42
- 239000003112 inhibitor Substances 0.000 abstract 2
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- 238000004806 packaging method and process Methods 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 description 31
- 239000002775 capsule Substances 0.000 description 16
- 238000004519 manufacturing process Methods 0.000 description 15
- 229920000139 polyethylene terephthalate Polymers 0.000 description 11
- 239000005020 polyethylene terephthalate Substances 0.000 description 11
- 229920009441 perflouroethylene propylene Polymers 0.000 description 10
- 239000004743 Polypropylene Substances 0.000 description 8
- 239000004734 Polyphenylene sulfide Substances 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 229920000069 polyphenylene sulfide Polymers 0.000 description 7
- 229920002799 BoPET Polymers 0.000 description 6
- 230000006866 deterioration Effects 0.000 description 6
- 239000000835 fiber Substances 0.000 description 6
- 239000010931 gold Substances 0.000 description 6
- 238000010030 laminating Methods 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 6
- 238000002788 crimping Methods 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 5
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 5
- 239000011112 polyethylene naphthalate Substances 0.000 description 5
- -1 polyethylene terephthalate Polymers 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 239000000806 elastomer Substances 0.000 description 4
- 229910052737 gold Inorganic materials 0.000 description 4
- 230000001939 inductive effect Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000005669 field effect Effects 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- 229920000106 Liquid crystal polymer Polymers 0.000 description 2
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 239000004954 Polyphthalamide Substances 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 2
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 2
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000006071 cream Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 229920006324 polyoxymethylene Polymers 0.000 description 2
- 229920006375 polyphtalamide Polymers 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 229920006269 PPS film Polymers 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 208000013201 Stress fracture Diseases 0.000 description 1
- 229920001893 acrylonitrile styrene Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000012994 photoredox catalyst Substances 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- SCUZVMOVTVSBLE-UHFFFAOYSA-N prop-2-enenitrile;styrene Chemical compound C=CC#N.C=CC1=CC=CC=C1 SCUZVMOVTVSBLE-UHFFFAOYSA-N 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
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
-
- 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
- H04R19/04—Microphones
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G7/00—Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture
- H01G7/02—Electrets, i.e. having a permanently-polarised dielectric
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
- H04R1/083—Special constructions of mouthpieces
- H04R1/086—Protective screens, e.g. all weather or wind screens
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
- H04R31/006—Interconnection of transducer parts
Definitions
- the present invention relates to a capacitor sensor used as a microphone, a vibration sensor, and the like.
- a conductive capsule, and a conductive capsule housed in the conductive capsule and having a peripheral ring portion formed on the periphery A conductive vibration film that is housed in the conductive capsule and is spaced apart from the conductive reinforcing plate, the conductive ring being electrically connected to the conductive capsule when the peripheral ring portion of the conductive reinforcing plate is engaged with the conductive capsule.
- a condenser microphone in which a gap is formed between a conductive capsule and a conductive reinforcing plate is known as a condenser sensor.
- the conductive capsule is engaged with the conductive capsule only at the peripheral ring portion facing the portion of the conductive capsule that is relatively difficult to deform. Thus, the transmission of the deformation to the conductive reinforcing plate was suppressed.
- the conventional condenser microphone has a structure in which the deformation of the conductive capsule is applied to the conductive reinforcing plate by actively allowing the deformation of the conductive capsule in a gap formed between the conductive capsule and the conductive reinforcing plate. Transmission was suppressed.
- an object of the present invention is to provide a capacitor sensor that can suppress deterioration of frequency characteristics. Disclosure of the invention
- the capacitor sensor according to the present invention includes: a conductive case having an opening and a facing portion facing the opening; a fixed electrode housed in the conductive case through the opening; A conductive vibrating film housed inside the conductive case and arranged on the opening side of the fixed electrode and spaced apart from the fixed electrode; and a vibrating film housed inside the conductive case and held by the conductive case.
- the capacitor sensor of the present invention suppresses the deformation of the opposing portion, so that the deterioration of the frequency characteristics due to the deformation of the opposing portion can be suppressed.
- the capacitor sensor of the present invention has a configuration in which the fixed electrode and the deformation suppressing unit are integrally formed.
- the capacitor sensor of the present invention can reduce the number of components as compared with the case where the fixed electrode and the deformation suppressing unit are separate components.
- the capacitor sensor of the present invention has a configuration in which the vibration film has a resin film on which a conductive substance is laminated. According to this configuration, in the capacitor sensor of the present invention, the vibration film can be reduced in weight as compared with the case where the vibration film is formed only of metal. The sensitivity can be improved as compared with. Further, the capacitor sensor of the present invention has a configuration in which the vibrating membrane holding unit is a composite of a conductor and an insulator.
- the capacitor sensor of the present invention can reduce the stray capacitance between the conductive case and the vibration film, as compared with the case where the vibration film holding unit is formed only of a conductor, Sensitivity can be improved.
- the conductive case and the fixed electrode each have a sound hole formed therein, and the total area of the sound hole of the conductive case is a total area of the sound hole of the fixed electrode.
- the total area of the sound hole of the fixed electrode is larger than l Z i 0
- It has a configuration larger than 0 and smaller than 110.
- the capacitor sensor of the present invention can transmit a sufficient sound pressure to the diaphragm, and can obtain a sufficient sensitivity.
- the capacitor sensor of the present invention has a configuration in which the thickness of the vibrating membrane is larger than 3 / xm.
- the capacitor sensor of the present invention can achieve both high sensitivity and high yield.
- the capacitor sensor of the present invention has a configuration in which the fundamental resonance frequency of the vibrating membrane is greater than K ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ and less than 35 KHz.
- the capacitor sensor of the present invention can achieve both high sensitivity and high yield.
- the capacitor sensor of the present invention includes an electret material attached to the fixed electrode, and has a configuration in which the thickness of the electret material is larger than 25 ⁇ m. With this configuration, the capacitor sensor of the present invention can achieve both high sensitivity and high yield.
- the capacitor sensor of the present invention includes a conductive face cloth attached to the conductive case and electrically connected to the conductive case, wherein the conductive case and the fixed electrode each include a sound. A hole is formed, and the sound hole of the conductive case has a configuration covered with the conductive surface cloth. With this configuration, the capacitor sensor of the present invention can suppress electromagnetic noise outside the conductive case from entering the inside of the conductive case through the sound hole of the conductive case. Electromagnetic noise outside the case can be prevented from reaching the vibrating membrane.
- the capacitor sensor according to the present invention has a configuration in which the conductive face cloth is a composite of a conductive substance and a non-conductive substance.
- the production of the conductive face cloth can be facilitated as compared with the case where the conductive face cloth is formed only of the conductive substance.
- the capacitor sensor of the present invention includes a conductive spacer disposed between the conductive case and the fixed electrode, wherein the conductive case and the fixed electrode each have a sound hole formed therein. have.
- the distance from the surface of the conductive case where the sound hole is formed to the fixed electrode is smaller than that of the case where the conductive case and the fixed electrode are in direct contact with each other. Since the length is long, electromagnetic noise outside the conductive case can be suppressed from reaching the vibrating membrane.
- the capacitor sensor of the present invention has a configuration in which at least a part of the sound hole of the fixed electrode faces a portion other than the sound hole of the conductive case.
- the capacitor sensor according to the present invention has Electromagnetic noise outside the conductive case can be prevented from reaching the vibrating membrane, as compared with the case where the portion faces the sound hole of the conductive case.
- the fixed electrode has a configuration in which the shape of the outer peripheral portion is different from that of the vibration film.
- the capacitor sensor according to the present invention has a structure in which the floating between the fixed electrode and the portion other than the vibrable portion of the vibrating membrane is compared with the case where the fixed electrode has the same outer peripheral shape as the vibrating membrane.
- the capacity can be reduced, and the output voltage can be improved.
- the capacitor sensor of the present invention has a configuration provided with an insulating portion provided on a surface of the conductive case on the side of the vibration film holding portion.
- the number of components of the capacitor sensor of the present invention can be reduced as compared with the case where the insulating portion is independent of the conductive case.
- the capacitor sensor of the present invention includes an insulating part between the conductive case and the vibrating membrane holding part, and the insulating part has a configuration independent of the conductive case.
- the capacitor sensor of the present invention has a simple structure as compared with the case where the insulating portion is attached to the conductive case, and therefore can be easily manufactured.
- the capacitor sensor of the present invention has a configuration in which the insulating portion is a composite of a metal base material and an insulating material applied to a surface of the base material.
- the rigidity of the insulating portion can be improved as compared with the case where the insulating portion is formed only of the insulating material.
- the capacitor sensor of the present invention includes a conductive member disposed between the vibration film holding unit and the circuit mounting board, and the circuit mounting board includes the vibration film via the conductive member. Has a configuration that is electrically connected to the holder are doing.
- the height of the capacitor sensor of the present invention can be easily adjusted by the conductive member.
- the capacitor sensor of the present invention includes a terminal electrically connectable to an external device, and a noise removing unit electrically connected to the terminal to remove noise, wherein the noise removing unit includes the circuit It has a configuration mounted on a mounting board.
- the capacitor sensor of the present invention can remove noise input from the outside through a terminal that can be electrically connected to an external device.
- the capacitor sensor of the present invention has a configuration including a pallister element electrically connected to the terminal and mounted on the circuit mounting board.
- the capacitor sensor of the present invention can improve the ESD (electrostatic discharge) resistance.
- the capacitor sensor of the present invention has a configuration including an element embedded inside the circuit mounting board.
- the distance between the circuit mounting board and the vibration film can be reduced as compared with the case where the element is mounted on the circuit mounting board, so that the height is reduced. be able to.
- the capacitor sensor of the present invention has a configuration including an element formed on the circuit mounting board by at least one of printing and a thin film process.
- the capacitor sensor of the present invention can reduce the distance between the circuit mounting board and the vibration film as compared with the case where the elements are mounted on the circuit mounting board by soldering. Can be reduced.
- the capacitor sensor of the present invention is mounted on the circuit mounting board. ,.,
- the capacitor sensor of the present invention has an insulating portion provided on a surface of the conductive case on the fixed electrode side, and a conductive portion electrically connecting the conductive case and the fixed electrode. It has the following configuration.
- the conductive case and the fixed electrode are electrically connected to each other even if the insulating portion attached to the fixed electrode side surface of the conductive case is not removed.
- the conductive case and the fixed electrode can be easily manufactured as compared with the case where they are electrically connected to each other.
- the capacitor sensor of the present invention includes: a conductive case having a pair of openings facing each other; a fixed electrode press-fitted into the conductive case through the opening; A conductive vibrating film housed and spaced apart from the fixed electrode; a conductive vibrating film holding unit housed inside the conductive case and holding the vibrating film; It has a configuration provided with the fixed electrode and the vibrating film housed therein and a circuit mounting board electrically connected to the conductive case and the vibrating film holding portion, respectively.
- the capacitor sensor of the present invention can suppress the deterioration of the frequency characteristics due to the deformation of the conductive case.
- FIG. 1 is a side sectional view of the capacitor sensor according to the first embodiment of the present invention.
- FIG. 2 is a side cross-sectional view of the capacitor sensor shown in FIG. 1 in an example different from the example shown in FIG.
- FIG. 3 (a) is a circuit diagram of the capacitor sensor shown in Fig. 1
- Fig. 3 (b) shows the effective capacitance of the capacitor sensor shown in Fig. 1, the stray capacitance between the fixed electrode and the vibrating membrane
- FIG. 4 is a diagram showing a relational expression with an input capacitance of a FET (field effect transistor).
- 4 (a) to 4 (f) are plan views of the fixed electrode of the capacitor sensor shown in FIG.
- FIGS. 5A to 5C are plan views of the fixed electrode of the capacitor sensor shown in FIG. 1 in an example different from the examples shown in FIGS. 4A to 4F.
- Fig. 6 (a) is a top view of the diaphragm and the diaphragm holder of the capacitor sensor shown in Fig. 1
- Fig. 6 (b) is a lower surface of the diaphragm and the diaphragm holder of the capacitor sensor shown in Fig. 1.
- FIG. 7 is a circuit diagram of the capacitor sensor shown in FIG. 1 in an example different from the example shown in FIG. 3 (a).
- FIG. 8 is a diagram showing experimental results of the capacitor sensor shown in FIG.
- FIG. 9 is a diagram showing experimental results different from the experimental results shown in FIG. 8 for the capacitor sensor shown in FIG.
- FIG. 10 is a diagram showing experimental results different from the experimental results shown in FIGS. 8 and 9 for the capacitor sensor shown in FIG.
- FIG. 11 is a front view of the capacitor sensor shown in FIG. 1 when the capacitor sensor shown in FIG. 1 is used as a microphone.
- FIG. 12 (a) is a back view of the FET mounted on the circuit board of the capacitor sensor shown in Fig. 1, and Fig. 12 (b) is the example shown in Fig. 12 (a).
- FIG. 2 is a back view of an FET mounted on a circuit mounting board of the capacitor sensor shown in FIG. 1 in a different example from that of FIG.
- FIGS. 13 (a) to 13 (h) are side views in a predetermined manufacturing process of the circuit mounting board of the capacitor sensor shown in FIG.
- FIGS. 14 (a) to 14 (e) are side views in a predetermined manufacturing process of the circuit mounting board of the capacitor sensor shown in FIG. 1 in an example different from the example shown in FIG.
- FIG. 15 is a side cross-sectional view of a circuit mounting board of the capacitor sensor shown in FIG. 1 in an example different from the examples shown in FIGS. 13 and 14.
- FIG. 16 is a circuit diagram of the capacitor sensor shown in FIG. 1 in an example different from the examples shown in FIGS. 3 (a) and 7.
- FIG. 17 is a side sectional view of a capacitor sensor according to the second embodiment of the present invention.
- FIG. 18 is a side sectional view of a capacitor sensor according to the third embodiment of the present invention.
- FIG. 19 is a side sectional view of a capacitor sensor according to the fourth embodiment of the present invention.
- FIG. 20 is a side sectional view of a capacitor sensor according to the fifth embodiment of the present invention.
- FIG. 21 is a plan view of a conductive case of the capacitor sensor shown in FIG.
- FIG. 22 is a side sectional view of a capacitor sensor according to the sixth embodiment of the present invention.
- FIG. 23 is a side sectional view of a capacitor sensor according to the seventh embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION
- the front electret-type capacitor sensor 10 has an opening 22 a and a facing portion 22 b facing the opening 22 a.
- a conductive case 20 having a sound hole 20 a formed therein, an insulating portion 21 provided on an inner surface of the conductive case 20, and a conductive case 20 inside the conductive case 20.
- the fixed electrode 30 is disposed in contact with the conductive material, and the electret material 31 laminated on the surface of the fixed electrode 30 opposite to the contact surface side with the conductive case 20 is electrically conductive.
- the spacer 40 is disposed inside the conductive case 20 in contact with the electret material 31, and the fixed electrode 30 is placed inside the conductive case 20 by contacting the spacer 40.
- Diaphragm 51 disposed on the opening 22 a side of the conductive case 20 and a diaphragm holder disposed inside the conductive case 20 and holding the diaphragm 51. 5 2, a circuit mounting board 60 disposed inside the conductive case 20 in contact with the vibrating membrane holding section 52 to cover the inside of the conductive case 20, and from the outside of the conductive case 20. And a conductive face cloth 70 covering the sound hole 20 a of the conductive case 20.
- the capacitor sensor 10 has a conductive member 53 between the vibrating membrane holder 52 and the circuit mounting board 60 to facilitate height adjustment. it can.
- the capacitor sensor 10 will be described with a configuration in which the capacitor sensor 10 includes the conductive member 53.
- the conductive case 20 is made of a metal such as aluminum, western steel, and SUS, which is industrially relatively inexpensive, has high corrosion resistance, and has high conductivity. It is desirable that The surface of the metal may be plated with gold for the purpose of further improving conductivity and corrosion resistance.
- the insulating portion 21 is made of a resin having a relatively low dielectric constant, or a resin and a metal, because of the ease of processing and shaping and the need to reduce the stray capacitance irrespective of the sensitivity of the capacitor sensor 10. It is preferably formed by a complex with
- the insulating portion 21 is formed by fusing or applying PET (polyethylene terephthalate), PP (polypropylene), PEN (polyethylene naphthalate), or FEP to the conductive case 20.
- PET polyethylene terephthalate
- PP polypropylene
- PEN polyethylene naphthalate
- FEP polyethylene naphthalate
- a resin film such as (polyethylene fluoride) may be used, or an epoxy-based adhesive may be used.
- the insulating part 21 can have various thicknesses and arrangements.
- the insulating portions 21 may be dispersedly arranged by being partially applied to the inner surface of the conductive case 20.
- the insulating portion 21 has a thickness and an arrangement that reduce the stray capacitance between the conductive case 20 and the vibration film holding portion 52 and the conductive member 53.
- the conductive case 20 provided with the insulating portion 21 may be formed, for example, by fusing an insulating resin to become the insulating portion 21 or drawing the applied laminated metal sheet into a case shape.
- the insulating resin on the surface of the conductive case 20 on which the sound holes 20a are formed can be easily manufactured by applying a blast method or the like.
- the fixed electrode 30 has a sound hole 30a.
- the total area of the sound hole 20a of the conductive case 20 is desirably larger than the sound hole 30a of the fixed electrode 30 in order to suppress the reflection and resonance of sound pressure from the outside.
- the total area of the sound holes 30a of the fixed electrode 30 is 5 la of the vibrating membrane 51, which is not fixed by the vibrating membrane holding section 52 (hereinafter referred to as a "vibrating section"). It is desirable that the total area be smaller than 1Z10 and larger than 1Z1000.
- the capacitor sensor 10 cannot obtain sufficient sensitivity. Also, when the total area of the sound holes 30a of the fixed electrode 30 is smaller than the total area of the vibrating part 51a of the vibrating membrane 51, the capacitance sensor 10 is sufficient. High sound pressure cannot be transmitted to the diaphragm 51. Note that, when the capacitor sensor 10 is used as a vibration sensor, it is not limited to this because introduction of sound pressure is not required.
- the fixed electrode 30 includes a deformation suppressing portion 32 for suppressing deformation of the facing portion 22 b of the conductive case 20 inside the outer periphery 51 b of the vibrating portion 51 a of the vibrating membrane 51. Has on the side. Therefore, the capacitor sensor 10 can suppress the deterioration of the frequency characteristic due to the deformation of the facing portion 22b. Since the fixed electrode 30 and the deformation suppressing portion 32 are integrally formed in the capacitor sensor 10, compared with the case where the fixed electrode 30 and the deformation suppressing portion 32 are separate components, Although the number of components can be reduced, a configuration in which the fixed electrode 30 and the deformation suppressing portion 32 are separate components may be used.
- the fixed electrode 30 is desirably formed of a metal such as SUS, brass that has been subjected to an anticorrosion treatment such as a Ni plating, or Western-style metal, and the surface of the metal further has conductivity and Gold plating may be used for the purpose of enhancing anticorrosion.
- the fixed electrode 30 can be formed of a material having a higher bending strength than the conductive case 20, thereby easily realizing the strength stability in thinning and miniaturization. , That it can.
- the electret material 31 is desirably formed of FEP, and is joined to the fixed electrode 30 by coating or heat-sealing a film.
- the electret material 31 is highly charged by being charged beforehand with an electron beam or corona discharge before the fixed electrode 30 is inserted into the conductive case 20. Electric potential is obtained.
- spacer 40 has high insulation properties such as PET, PP, PPS (polyphenylene sulfide), and PEN, has relatively low hygroscopicity, and is hardly subjected to plastic deformation, stress fracture, etc., and is processed. It is preferably formed of a resin having excellent properties.
- the vibration film 51 may be formed of Au, Pt, Ti having both conductivity and corrosion resistance, but may be formed of a conductive polymer film or PET, PP, PPS, PEN or the like. It is formed by laminating conductive substances such as Au, Ni, Pt, Ti, V, W, Ta, etc. on an insulating resin film using, for example, a vacuum evaporation method or a sputtering method. Is preferred.
- the vibration film 51 is formed of a resin film in which a conductive material is laminated, the weight can be reduced as compared with the case where the vibration film 51 is formed of only a metal. In this case, the sensitivity of the capacitor sensor 10 can be improved as compared with the case in which the voltage is applied.
- the diaphragm 51 is arranged so as to be electrically connected to the diaphragm holder 52.
- the vibration film 51 is formed of a multi-layered insulating resin film and metal as described above
- the metal-deposited surface and the vibration film holding portion 52 are formed of an epoxy-based adhesive or the like. The connection can be easily ensured by the connection.
- the vibrating membrane holding section 52 is intended to keep the tension of the vibrating membrane 51 constant, and desirably has high mechanical strength, especially sus, west night, brass, etc. It is preferably formed of a metal or a composite of a metal and a resin.
- the conductive member 53 is preferably formed of a metal or a composite of a metal and a resin, similarly to the vibrating membrane holder 52.
- the conductive case 20, the diaphragm holder 52, and the conductive member 53 are not directly connected to each other due to the presence of a gap in addition to the insulating portion 21. It has become.
- the circuit mounting substrate 60 is formed of an unillustrated impedance conversion element or amplifier circuit such as a JFET (junction field effect transistor) or a MOSFET (metal oxide semiconductor field effect transistor). 20 and is electrically connected to the conductive member 53 by the impedance conversion element, which is provided as a pattern on the conductive member 53 side, and is electrically connected to the conductive member 53. 53 The source of the impedance conversion element, which is provided as a pattern on the opposite side to the third side, is electrically connected to a part 20 b of the conductive case 20.
- a JFET junction field effect transistor
- MOSFET metal oxide semiconductor field effect transistor
- a change in potential due to a change in capacitance between the fixed electrode 30 and the diaphragm 51 can be detected as a change in resistance between the drain and source of the impedance conversion element.
- the circuit mounting board 60 is pressed against the negative part 20b of the conductive case 20 by curling force as shown in the figure, so that the conductive case is formed by the source of the impedance conversion element.
- it can be electrically connected to a part 20 b of 20, it is electrically connected to a part 20 of the conductive case 20 at the source of the impedance conversion element using ultrasonic bonding or welding. You can also.
- the conductive face cloth 70 not only can prevent dust from entering the sound hole 20a of the conductive case 20 but also can prevent electromagnetic noise outside the conductive case 20 from being conductive.
- the conductive case 20 can be prevented from entering the conductive case 20 through the sound hole 20 a of the case 20. It is possible to suppress the external electromagnetic noise of 20 from reaching the diaphragm 51 and affecting the diaphragm 51.
- the conductive face cloth 70 is made of, for example, a metal fiber, a composite fiber obtained by applying carbon or plating to a resin fiber, a composite of a resin fiber and a metal fiber, or a metal filler in a resin fiber. It may be formed by a compound of the above. Further, the conductive face cloth 70 may be formed by laminating a conductive face on a non-conductive face cloth using sputtering, vacuum evaporation, plating, or the like. When the conductive face cloth 70 is a composite of a conductive substance and a non-conductive substance, it can be easily manufactured as compared with the case where the conductive face cloth is formed of only a conductive substance.
- the conductive case 20 and the conductive face cloth 70 can be easily conducted by being joined to each other with a resin adhesive or a conductive double-sided tape.
- the conductive face cloth 70 may be subjected to waterproof treatment using a fluorine-based compound on the surface on the side opposite to the contact surface with the conductive case 20.
- FIG. 1 and FIG. 2 Although only the cross-sectional structure of the capacitor sensor 10 is shown in FIG. 1 and FIG. 2, various shapes such as a cylinder and a square pillar can be adopted.
- the capacitor sensor 10 uses, for example, an FET as an impedance conversion element, as shown in FIG. 3A, a terminal 10a that can be electrically connected to an external device, and a FET and a diode.
- a circuit comprising an IC chip 1 O b mounted on a circuit mounting board 60 by integrating the capacitors and a capacitor 100 formed by a fixed electrode 30 and a vibrating membrane 51 is formed.
- the effective capacitance (C eff) of the capacitor sensor 10, the floating capacitance (C s) between the fixed electrode 30 and the vibrating membrane 51, and the input capacitance (C iss) of the FET are: It is considered that the relationship shown in Fig. 3 (b) holds. That is, the capacitor sensor 10 can increase the output voltage by reducing the stray capacitance.
- the capacitor sensor 10 can increase the output voltage by reducing the stray capacitance.
- the fixed electrode 30 shown in FIG. 4 (a) has a circular shape, and has three sound holes 30a.
- the structure is such that the stray capacitance between the movable portion 51 and the portion other than 51a (hereinafter referred to as the "non-viable portion") 51c (see Fig. 1) is reduced.
- the removed portion 30b of the fixed electrode 30 may reach the surface of the vibrating membrane 51 facing the vibrating portion 51a.
- the deleted part 30b reaches the surface of the vibrating membrane 51 facing the vibrable part 51a, and a part of the deleted part 30b is sounded.
- the sound pressure can be introduced from the conductive case 20 side to the diaphragm 51 through a part of the deleted part 30b, so that the central sound hole 30a (Fig. 4 ( b))).
- the total area of the sound hole 30a of the fixed electrode 30 shown in Fig. 4 (a) and the removed part 30b of the fixed electrode 30 shown in Fig. 4 (c) are the conductive case 20 side.
- the effective vibration width of the diaphragm 51 is large.
- the sound electrode 30a is formed at a position facing the center of the diaphragm 51 as shown in FIG. 4 (a). Compared to 0, the sensitivity of the capacitor sensor 10 can be improved. Similarly, it is preferable that the fixed electrode 30 has a structure as shown in FIGS. 4 (d) to 4 (f).
- the fixed electrode 30 When the capacitor sensor 10 has a square prism shape and the diaphragm 51 has a square shape, the fixed electrode 30 has a shape as shown in FIG. The stray capacitance during the period can be reduced.
- the fixed electrode 30 shown in FIG. 5A has a rectangular shape, and has three sound holes 30a.
- the fixed electrode 30 shown in FIG. 5 (b) has a shape different from that of the vibrating membrane 51 because the outer peripheral part is shaved and the deleted part 30b is provided.
- the structure is such that the stray capacitance between the non-vibration part 51c is reduced.
- the removed portion 30b of the fixed electrode 30 may reach the surface of the vibrating membrane 51 facing the vibrating portion 51a.
- the deleted portion 30b is made to reach the surface of the vibrating membrane 51 facing the vibrable portion 5la, and a part of the deleted portion 30b is made a sound hole.
- the central sound hole 30 a (Fig. 5 (b ) See).
- the total area of the sound hole 30a of the fixed electrode 30 shown in Fig. 5 (a) and the removed part 30b of the fixed electrode 30 shown in Fig. 5 (c) are the conductive case 20 side.
- the effective vibration width of the diaphragm 51 is large.
- the sound electrode 30a is formed at a position facing the center of the diaphragm 51 because it is located at a position facing the center of the diaphragm 51.
- the diaphragm holder 52 includes a conductor 52 a and an insulator 5 as shown in FIG.
- the vibrating membrane holder 52 shown in FIG. 6 can be easily realized by an integrally molded product of an insulating resin and a metal.
- the conductive member 53 also has the same structure as the vibrating membrane holder 52, and has a floating capacity between the conductive case 20 and the conductive member 53.
- the IC which integrates the resistor R 1 functions to increase the output response by discharging the excess charge on the FET, the diode, and the gate of the FET.
- the circuit mounting board 60 is composed of 0 d and a CR low-pass filter 10 e as a noise elimination section, which is composed of a capacitive element C and a resistance element R 2 and connected between the drain and the source of the FET. It may be implemented.
- the capacitor sensor 10 includes the CR low-pass filter 10e connected between the drain and the source of the FET, noise externally input through the terminal 10a can be removed.
- the capacitor sensor 10 includes a CRL, CL, or RL circuit using an inductive element L, and one or more circuits. By providing a bypass capacitor circuit using only the capacitive element C as a noise removing unit, it is possible to remove noise between the drain and the source of the FET.
- the noise input from the outside through the terminal 10a includes, for example, noise received by a radio wave of the mobile phone when the capacitor sensor 10 is used as a capacitor microphone in the mobile phone.
- the capacitor sensor 10 can also improve the ESD resistance by providing a paristor element between the drain and the source of FET.
- the high resistance 1 ⁇ 1 of the one chip 1001 is preferably, for example, 100 ⁇ ⁇ or more and 20 or less, particularly preferably 1 GQ or more and 10GQ or less.
- the capacitive element C of the CR low-pass filter 10e preferably has a value of 10 PF or more and 10 nF or less
- the resistance element R2 preferably has a value of 10 ⁇ or more and 100 ⁇ or less.
- capacitor sensor 10 configured as described above The optimal structure and characteristics will be described.
- a condenser microphone with a height of 1.4 mm, a cylindrical shape and a diameter of 6 mm was manufactured.
- the conductive case 20 a night stay with a thickness of 0.12 mm was used, and as the insulating portion 21, the sea stay was fused to the conductive case 20. PET film was used.
- the fixed electrode 30 an electrode obtained by laminating FEP having a thickness of 12.5 ⁇ on a SUS material having a thickness of 0.2 mm and charging it to 280 V was used. Further, as the vibrating membrane holder 52 and the conductive member 53, a 0.3 mm thick SUS material was used.
- the diaphragm 51 is made of PET film having various thicknesses and deposited with Au having a thickness of 20 nm or Ni having a thickness of 70 nm, and is used as a spacer 40. For this, a PET with a thickness of 38 / zm was used. Each was assembled in a condenser microphone and the sensitivity was measured. As shown in Fig. 8, from the viewpoint of the sensitivity of the capacitor sensor 10, there is an optimum value for the PET film thickness of the diaphragm 51, and when the thickness of the diaphragm 51 is 1 / xm or less, the capacitor sensor The sensitivity was very uneven.
- the capacitor sensor 10 achieves both high sensitivity and high yield.
- a condenser microphone with a height of 1.4 mm, a cylindrical shape and a diameter of 6 mni was manufactured.
- the conductive case 20 a Western board having a thickness of 0.12 mm is used, and as the insulating portion 21, A FEP film fused to a Western-style bed that becomes a conductive case 20 was used.
- the fixed electrode 30 a material obtained by laminating a FEP having a thickness of 12.5 m on a SUS material having a thickness of 0.2 mm and charging at 280 V was used.
- a SUS material having a thickness of 0.3 mm was used as the vibrating membrane holder 52 and the conductive member 53.
- the spacer 40 PP having a thickness of 30 / m was used.
- the diaphragm 51 is made of a PPS film with a thickness of 2 and Au is deposited with a thickness of 20 nm, and the tension applied to the diaphragm holder 52 is changed in various ways. These were assembled into a condenser microphone mouth phone, and the relationship between the fundamental resonance frequency ⁇ 0 of the diaphragm 51 and the sensitivity was examined.
- the basic resonance frequency f0 of the vibrating membrane 51 has an optimum value, and in particular, the basic resonant frequency f0 of the vibrating membrane 51 is 1 At OKHz or lower, the sensitivity of the capacitor sensor 10 fluctuates greatly.
- the fundamental resonance frequency f 0 of the diaphragm 51 is approximately 35 kHz or higher, the capacitor sensor 10 cannot obtain sufficient sensitivity.
- the capacitor sensor 10 achieves both high sensitivity and high yield.
- a condenser microphone having a height of 1.4 mm, a cylindrical shape and a diameter of 6 mm was manufactured.
- the conductive case 20 a night stay having a thickness of 0.12 mm was used, and as the insulating portion 21, resin was applied to the night stay which became the conductive case 20.
- the constant electrode 30 a stack of FEPs having various thicknesses on a SUS material having a thickness of 0.2 mm was prepared, and each was charged to 280 V.
- a SUS material having a thickness of 0.3 mm was used as the vibrating membrane holder 52 and the conductive member 53.
- the vibrating film 51 a film obtained by evaporating Ti having a thickness of 40 nm on a PET film having a thickness of 1.5 m was used. Each was assembled into a condenser microphone and the relationship between the thickness of the FEP film of the fixed electrode 30 and the sensitivity was examined.
- the capacitor sensor 10 achieves both high sensitivity and high yield.
- the condenser sensor 10 is a condenser microphone with a height of about 1.5 mm, a cylindrical shape with a diameter of 4 mm, and a condenser with a length of about 1.0 mm, a cylindrical shape with a diameter of 6 mm.
- a microphone and a microphone were manufactured.
- the conductive case 20 a night stay with a plate thickness of 0.12 mm is used, and as the insulating portion 21, insulation coating is applied to the night stay that becomes the conductive case 20. This was used.
- the fixed electrode 30 was prepared by laminating a FEP having a thickness of 12.2 on a SUS material having a thickness of 0.1 mm and charging it to a voltage of 200 V to 300 V. .
- a SUS material having a thickness of 0.4 mm was used as the vibrating membrane holder 52 and the conductive member 53.
- the condenser microphone having a height of 1.0 mm, a cylindrical shape, and a diameter of 6 mm was not provided with the conductive member 53.
- a thickness of 2.5 / zm A PET film having a thickness of 70 nm deposited with Ni was used as the spacer 40.
- a PET having a thickness of 38 ⁇ was used. Each was assembled in a condenser microphone and the sensitivity was measured.
- a condenser microphone with a height of 1.5 mm and a cylindrical shape and a diameter of 4 mm has a sensitivity of 48 dB 44 dB, a height of 1.O mm and a shape
- a condenser microphone having a cylindrical shape and a diameter of 6 mm a high sensitivity of 45 dB to 38 dB was achieved.
- the frequency characteristics of these condenser microphones showed almost the same values up to 2 OKHz.
- the fixed electrode 30 is formed by laminating a FEP having a thickness of 12.5 ⁇ on a SUS material having a thickness of 0.1 mm and charging it to a voltage of 200 V to 300 V. Was used.
- a SUS material having a thickness of 0.4 mm was used as the vibrating membrane holder 52 and the conductive member 53.
- a PET film having a thickness of 1.5 ⁇ was used in which 70 nm thick Ni was vapor-deposited, and a spacer 40 having a thickness of 3 nm was used. 8 / xm PET was used. Each was assembled in a condenser microphone and the sensitivity was measured.
- the capacitor sensor 10 is equipped with an elastomer 81 and a conductive elastomer 82 for suppressing vibration, and is attached to a normal microphone of a mobile phone (not shown). Replace and from multiple speakers A hands-free call at a distance of about 30 cm demonstrated that it was possible to adequately hear conversations between multiple persons that could not be heard with a mobile phone equipped with a normal microphone-phone.
- the elastomer 81 may be rubber
- the conductive elastomer 82 may be a panel.
- a fixed electrode 30 with an electret material 31 attached thereto, a spacer 40, and a vibration are provided inside a conductive case 20 with an insulating portion 21 attached.
- the vibrating membrane holder 52 with the membrane 51 attached thereto, the conductive member 53, and the circuit mounting board 60 are sequentially inserted.
- the circuit mounting substrate 60 is pressed against a part 2 Ob of the conductive case 20 by curling or force crimping, whereby the fixed electrode 30, the electret material 31, and the spacer 40 are pressed.
- the vibration film 51, the vibration film holding portion 52, the conductive member 53, and the circuit mounting board 60 are fixed inside the conductive case 20.
- the capacitor sensor 10 is assembled by bonding the conductive face cloth 70 to the conductive case 20.
- the circuit board 60 can reduce the distance between the vibrating membrane 51 when the IC circuit is mounted on a bare chip, as compared with the case where the IC circuit is mounted on a package.
- the height of the capacitor sensor 10 can be reduced. Therefore, as the mounting of the circuit mounting board 60, bare chip mounting of an IC circuit is preferable.
- the electrode shape of the bare chip of the FET 61 is such that the drain 61a and the source 61b are provided on the back surface, and the gate is provided on the surface not shown.
- the electrode may be provided with a drain 6 la, a source 61 b and a gate 61 c on the back surface as shown in FIG. 12 (b). good.
- each electrode is a start pan It can be realized with a structure used for ordinary bare chip mounting, such as a bump, a bump or a solder ball.
- the drain 61a and the source 61b on the back are mounted on the land on the circuit mounting board 60 by flip chip.
- the gate on the front surface is connected to the mounting surface of the circuit mounting board 60 by using wire bonding or the like.
- the bare chip of the FET 61 has the electrode shape shown in Fig. 12 (b)
- the drain 61a, the source 6lb and the gate 61c are attached to the land on the circuit mounting board 60.
- the flip-chip mounting can be performed at the same time, and the circuit mounting substrate 60 is manufactured by, for example, performing the bare mounting of the IC circuit as follows.
- an NCP non-conductive paste
- a substrate 62 such as a glass epoxy alumina substrate having electrodes 62a formed thereon as shown in FIG. 13 (a).
- a paste 63 such as an ACP (Aiso-Toro Beacon Dielectric Paste)
- the substrate 62 is applied from above the paste 63 applied to the substrate 62 as shown in FIG. 13 (c).
- the bare chip of FET 61 is pre-pressed with high positioning accuracy by heat.
- an NCF non-conductive film
- ACF isotropy conductive film
- the FETs 61 temporarily crimped to the substrate 62 are thermocompressed to the substrate 62 one by one or at a time by a thermocompression bonding device 91 as shown in FIG. 13D.
- a thermocompression bonding device 91 as shown in FIG. 13D.
- the FET 61 may be bonded to the substrate 62 using a bare mounting process other than thermocompression bonding, such as ultrasonic bonding.
- a cream solder 64 is printed on the substrate 62 on which the FET 61 is thermocompressed as shown in FIG. 13 (e), and the substrate 6 2 is printed as shown in FIG. 13 (f).
- chip components 65 such as capacitive elements, resistive elements, inductive elements, and paristor elements on the board 62 as necessary from the top of the cream solder 64 printed on the As shown in g), the chip component 65 mounted on the substrate 62 is joined to the substrate 62 by reflow.
- the individual circuit mounting boards 60 are removed from the collective board manufactured as described above to manufacture the circuit mounting boards 60.
- the collective substrate is in a half-punched state by a push pack or the like, or is separately separated in advance, the positioning accuracy of the bare chip with respect to the substrate 62 is reduced, and the mounting cycle for mounting the bare chip is reduced.
- the individual circuit mounting board 60 is removed from the collective board manufactured as shown in Fig. 13 (g)
- the occurrence of dust on the outer periphery of the individual circuit mounting board 60 is suppressed. The yield is improved.
- the bare chip mounting of the FET 61 on the board 62 should be performed before the mounting of the chip component 65 on the board 62.
- the mounting of the chip components 65 on the substrate 62 may be performed before the mounting of the bare chip on the substrate 62 of the FET 61.
- the circuit mounting substrate 60 is a sheet in which a capacitive element, a resistive element, or an inductive element is formed together with a circuit pattern by using a thin film process such as sputtering on a polyimide sheet, instead of the chip component 65.
- a device may be provided.
- the element 66 is printed or printed on the substrate 62 in advance.
- the circuit mounting substrate 60 is desirably manufactured as follows.
- a paste 63 is applied as shown in FIG. 14 (b) to a substrate 62 on which the element 66 has been formed by printing or a thin film process in advance.
- the bare chip of the FET 61 is preliminarily pressure-bonded to the substrate 62 from above the paste 63 applied to the substrate 62 with high positioning accuracy by heat.
- NCF or ACF may be attached to the substrate 62.
- thermocompression bonding device 91 the punches 61 temporarily bonded to the substrate 62 are heat-bonded to the substrate 62 by a thermocompression bonding device 91, as shown in FIG.
- the bare chip mounting is completed by crimping.
- the FET 61 instead of thermocompression bonding the FET 61 to the substrate 62, the FET 61 may be bonded to the substrate 62 using a bare mounting process other than thermocompression bonding, such as ultrasonic bonding.
- the structure of the circuit mounting substrate 60 is such that the FET 61 and the element 66 are embedded inside as shown in FIG. 15.
- the structure may be different.
- the distance between the circuit board 60 and the vibrating membrane 51 is smaller than when the element 61 is mounted on the surface. Since the size can be reduced, the height of the capacitor sensor 10 can be reduced.
- bare ICs mounted inside the capacitor sensor 10 are not only FETs 61 but also digital or analog audio amplifiers, voice recognition circuits, etc. implemented as ICs, and capacitive elements and resistive elements.
- a circuit formed in the same IC circuit or a high-frequency circuit as described later It may be a modified one.
- the capacitor sensor 10 can function as an electret condenser microphone.
- a configuration in which the electret material 31 is not laminated on any of the electrode 30 and the vibration film 51 may be employed.
- the capacitor sensor 10 has the fixed electrode 30 and the vibration as shown in FIG.
- the circuit 10 ⁇ ⁇ shown in FIG. 16 may be mounted on the circuit mounting board 60 with a bare chip.
- the configuration of the front electret-type capacitor sensor according to the second embodiment will be described. Note that, of the configuration of the front-electret type capacitor sensor according to the present embodiment, the same configuration as the configuration of the capacitor sensor 10 (see FIG. 1) according to the first embodiment will be described. The same reference numerals as those of the configuration of the capacitor sensor 10 are used, and the detailed description is omitted.
- the front electret-type capacitor sensor 100 is provided on the surface of the conductive case 20 where the sound hole 20 a is formed. Also, an insulating portion 21 is provided in a state of being in contact with the fixed electrode 30. Further, the electrical connection between the conductive case 20 and the fixed electrode 30 is realized by the conductive portion 11 generated by laser welding.
- the conductive case 20 to which the insulating portion 21 is attached is formed, for example, by drawing a laminated metal sheet to which an insulating resin is fused or applied, into a case shape. Just manufactured. That is, after the conductive case 20 is squeezed into the shape of the case, it is not necessary to remove the insulating portion 21 on the surface side where the sound hole 20a is formed by applying a plastic method or the like. Therefore, the capacitor sensor 100 can be manufactured more easily than the capacitor sensor 100.
- the circuit mounting substrate 60 is pressed against a part 2 Ob of the conductive case 20 by curling or force crimping, so that the fixed electrode 30, the electret material 31, and the spacer 40 are pressed.
- the vibrating membrane 51, the vibrating membrane holding unit 52, and the circuit mounting board 60 are fixed inside the conductive case 20.
- the capacitor sensor 100 is assembled.
- the capacitor sensor 100 has a height similar to that of the capacitor sensor 10 by providing a conductive member 53 (see FIG. 2) between the vibrating membrane holder 52 and the circuit board 60. Adjustment can be facilitated.
- the capacitor sensor 100 instead of generating the conductive portion 11 by laser welding, the capacitor sensor 100 generates a conductive portion by, for example, piercing the insulating portion 21 at the time of assembly with a projection provided in advance on the fixed electrode 30.
- the electrical connection between the conductive case 20 and the fixed electrode 30 can be realized by generating a conductive portion by soldering.
- Fixed electrode 30 When electrical connection between the conductive case 20 and the fixed electrode 30 is realized by a projection provided in advance, electrical connection between the conductive case 20 and the fixed electrode 30 is realized by performing laser welding. Compared to the case, the capacitor sensor 100 is easily manufactured.
- a front electret type capacitor sensor according to the third embodiment will be described. Note that among the configurations of the front-electret type capacitor sensor according to the present embodiment, the same configuration as the configuration of the capacitor sensor 10 according to the first embodiment (see FIG. 1) is referred to as a capacitor. The same reference numerals as in the configuration of the sensor 10 are assigned and the detailed description is omitted.
- the configuration of the front electret-type capacitor sensor 110 according to the present embodiment is similar to that of the insulating portion 21 (see FIG. 1) attached to the conductive case 20. Instead, the configuration is the same as the configuration in which the capacitor sensor 10 is provided with the insulating portion 11 1 independent of the conductive case 20 between the conductive case 20 and the vibration film holding portion 52.
- the insulating portion 111 is inevitable. Need to be thin. On the other hand, due to the problem of automatic mounting by a machine, the insulating part 111 must have some rigidity.
- the material of the insulating part 111 AS (acrylonitrile styrene copolymer), ABS (acrylonitrile butadiene styrene copolymer), PMMA (methyl methacrylate) , POM (Polyacetal), PBT (Polybutylene terephthalate), PP, PS (Polystyrene), PET, PC (Polycarbonate), PPA (Polyphthalamide), PPS, PI (Polyimide), LCP (Liquid Crystal Polymer) etc. are relatively preferred, but strong against insulation
- composites of these resins and glass and composites of these resins and metals are particularly preferable.
- the insulating portion 111 is formed of a composite material in which SUS is used as a base material and an insulating material is applied around the SUS as the base material.
- the number of components of the capacitor sensor 110 is larger than that of the capacitor sensor 10 in which the insulating part 21 is attached to the conductive case 20.
- the capacitor sensor 110 since the capacitor sensor 110 has a simple structure and can be easily manufactured as compared with the capacitor sensor 10, it is not necessary to attach the insulating part 21 to the conductive case 20. The manufacturing process can be reduced by a good amount, and the manufacturing cost can be reduced.
- the circuit mounting board 60 is inserted in order.
- the circuit mounting substrate 60 is pressed against a part 2 Ob of the conductive case 20 by curling or force crimping, so that the fixed electrode 30, the electret material 31, the spacer 40, The vibrating membrane 51, the vibrating membrane holding unit 52 and the circuit mounting board 60 are fixed inside the conductive case 20.
- the capacitor sensor 110 is assembled by bonding the conductive face cloth 70 to the conductive case 20.
- the capacitor sensor 110 has a height similar to that of the capacitor sensor 10 by providing a conductive member 53 (see FIG. 2) between the vibrating membrane holder 52 and the circuit board 60. Can be easily adjusted.
- the front electret-type capacitor according to the fourth embodiment is used.
- the configuration of the sensor will be described. Note that, of the configuration of the front-electret type capacitor sensor according to the present embodiment, the same configuration as the configuration of the capacitor sensor 110 according to the third embodiment (see FIG. 18).
- the same reference numerals as in the configuration of the capacitor sensor 110 denote the same elements, and a detailed description thereof will be omitted.
- the front electret-type capacitor sensor 120 has only the size of the fixed electrode 30, the spacer 40, and the insulating portion 111. Only differs from the capacitor sensor 110. Next, a method for manufacturing the capacitor sensor according to the present embodiment will be described.
- the circuit mounting board 60 is inserted in order.
- the circuit mounting substrate 60 is pressed against a part 20 b of the conductive case 20 by curling force, so that the fixed electrode 30, the electret material 31, and the spacer 40 are pressed. 0, vibrating membrane 51, vibrating membrane holding section 52 and circuit mounting board 60 are fixed inside conductive case 20.
- the capacitor sensor 120 is assembled by bonding the conductive face cloth 70 to the conductive case 20.
- the spacer 40 which is thinner and lighter than the fixed electrode 30, is inserted into the conductive case 20 before the insulating portion 111, so that the spacer When the spacer 40 is inserted into the conductive case 20, the spacer 40 does not catch on the insulating portion 111, and is easily manufactured as compared with the capacitor sensor 110. Can be.
- the capacitor sensor 110 can reduce the fixed electrode 30 and the spacer 40 as compared with the capacitor sensor 120, so that the The material cost can be reduced as compared with the densa sensor 120.
- the capacitor sensor 120 is provided with a conductive member 53 (see FIG. 2) between the vibrating membrane holder 52 and the circuit mounting board 60, as in the capacitor sensor 110. The adjustment of the height can be facilitated.
- the configuration of the front electret type capacitor sensor according to the fifth embodiment will be described. Note that, of the configuration of the front-electret type capacitor sensor according to the present embodiment, the same configuration as the configuration of the capacitor sensor 10 (see FIG. 1) according to the first embodiment is described below. The same reference numerals as those of the configuration of the capacitor sensor 10 are used, and the detailed description is omitted.
- the configuration of the front electret-type capacitor sensor 130 includes a conductive element disposed between the conductive case 20 and the fixed electrode 30. This is the same as the configuration in which the spacer 13 1 is provided with the capacitor sensor 10.
- the shape of the sound hole 20 a of the conductive case 20 is also different from that of the capacitor sensor 10. That is, in the capacitor sensor 130, the entire sound hole 30 a of the fixed electrode 30 faces the portion other than the sound hole 20 a of the conductive case 20. In other words, in the capacitor sensor 130, the sound hole 30a of the fixed electrode 30 does not face the sound hole 20a of the conductive case 20 at all.
- the capacitor sensor 130 has a cylindrical shape
- the conductive case 20 has a sound hole 20a as shown in FIG.
- the conductive spacer 13 1 is preferably made of metal from the viewpoint of strength and conductivity.
- the capacitor sensor 130 is composed of a conductive case 20 and fixed electrodes. Since the distance from the surface of the conductive case 20 where the sound hole 20 a is formed to the fixed electrode 30 is longer than that of the capacitor sensor 10 where 30 is in direct contact with each other, the conductive case 2 It is possible to suppress the external electromagnetic noise of 0 from reaching the diaphragm 51 and affecting the diaphragm 51.
- the sound hole 30a of the fixed electrode 30 and the sound hole 20a of the conductive case 20 do not face each other.
- electromagnetic noise outside the conductive case 20 reaches the diaphragm 51. The influence on the vibrating membrane 51 can be suppressed.
- the capacitor sensor 130 can suppress the electromagnetic noise outside the conductive case 20 from reaching the diaphragm 51 and affecting the diaphragm 51.
- a non-conductive face cloth that is less expensive than the conductive face cloth 70 can be provided.
- the fixed electrode 30 provided with the conductive spacer 13 1, the electret material 31, the spacer 40, and the vibration The vibrating membrane holder 52 with the membrane 51 attached thereto and the circuit board 60 are sequentially inserted.
- the circuit mounting substrate 60 is pressed against a part 2 Ob of the conductive case 20 by curling force, so that the conductive spacer 13 1, the fixed electrode 30, and the electric Tret material 31, spacer 40, vibrating film 51, vibrating film holder 52, and circuit mounting board 60 are fixed inside conductive case 20.
- the conductive face cloth 70 is bonded to the conductive case 20. Then, the capacitor sensor 130 is assembled.
- the capacitor sensor 130 has a height similar to that of the capacitor sensor 10 by providing a conductive member 53 (see FIG. 2) between the vibrating membrane holder 52 and the circuit board 60. Can be easily adjusted.
- the configuration of the front electret type capacitor sensor according to the sixth embodiment will be described. Note that, of the configuration of the front-electret type capacitor sensor according to the present embodiment, the same configuration as the configuration of the capacitor sensor 120 (see FIG. 19) according to the fourth embodiment.
- the same reference numerals as in the configuration of the capacitor sensor 120 denote the same parts, and a detailed description thereof will be omitted.
- the front electret-type capacitor sensor 140 has a configuration in which a conductive space is provided between the conductive case 20 and the fixed electrode 30. This is the same as the configuration in which the capacitor 13 1 is provided in the capacitor sensor 120.
- the shape of the sound hole 20 a of the conductive case 20 is also different from that of the capacitor sensor 120. That is, in the capacitor sensor 140, the entire sound hole 30 a of the fixed electrode 30 faces the portion other than the sound hole 20 a of the conductive case 20. In other words, in the capacitor sensor 140, the sound hole 30a of the fixed electrode 30 does not face the sound hole 20a of the conductive case 20 at all.
- the conductive spacer 13 1 is preferably made of metal from the viewpoint of strength and conductivity.
- the capacitor sensor 140 has a sound hole 20 a of the conductive case 20 compared to the capacitor sensor 120 in which the conductive case 20 and the fixed electrode 30 are in direct contact with each other. Distance from the surface where the Since the separation is long, it is possible to prevent the electromagnetic noise outside the conductive case 20 from reaching the diaphragm 51 and affecting the diaphragm 51.
- the sound hole 30a of the fixed electrode 30 and the sound hole 20a of the conductive case 20 do not face each other. Electromagnetic noise outside the conductive case 20 reaches the diaphragm 51 compared to the capacitor sensor 120, in which all of 0a faces the sound hole 20a of the conductive case 20 Thus, the influence on the vibration film 51 can be suppressed.
- the capacitor sensor 140 can suppress the electromagnetic noise outside the conductive case 20 from reaching the diaphragm 51 and affecting the diaphragm 51.
- a non-conductive face cloth that is less expensive than the conductive face cloth 70 can be provided in place of the conductive face cloth 70.
- the circuit mounting board 60 is pressed against a part 20 b of the conductive case 20 by curling force, so that the conductive spacer 13 1, the fixed electrode 30, and the electret
- the mounting member 31, spacer 40, vibrating film 51, vibrating film holder 52 and circuit board 60 are fixed inside the conductive case 20.
- the capacitor sensor 140 is assembled by bonding the conductive face cloth 70 to the conductive case 20.
- the capacitor sensor 140 is, like the capacitor sensor 120, By providing a conductive member 53 (see FIG. 2) between the vibrating membrane holder 52 and the circuit mounting board 60, the height can be easily adjusted.
- a front electret type capacitor sensor according to the seventh embodiment will be described. Note that, of the configuration of the front-electret type capacitor sensor according to the present embodiment, the same configuration as the configuration of the capacitor sensor 10 (see FIG. 1) according to the first embodiment is described. The same reference numerals as in the configuration of the capacitor sensor 10 denote the same components, and a detailed description thereof will be omitted.
- the front electret-type capacitor sensor 150 has a pair of openings 23 a and 23 b where the conductive case 20 faces each other. It differs from the capacitor sensor 10 in that the conductive face cloth 70 directly covers the sound hole 30 a of the fixed electrode 30.
- capacitor sensor 150 is connected to the opposite part 2 of the capacitor sensor 10.
- the conductive case 20 does not have a portion covering the fixed electrode 30 as in 2b (see FIG. 1), it is possible to suppress the deterioration of the frequency characteristics due to the deformation of the conductive case 20.
- the circuit board 60 is pressed against a part 2 Ob of the conductive case 20 by curling or force crimping, so that the electret material 31, s
- the sensor 40, the vibrating membrane 51, the vibrating membrane holder 52, and the circuit board 60 are fixed inside the fixed electrode 30 and the conductive case 20.
- the capacitor sensor 150 is assembled by joining the conductive face cloth 70 to the fixed electrode 30.
- the capacitor sensor 150 is similar to the capacitor sensor 10 in that a conductive member 53 (see FIG. 2) is provided between the vibrating membrane holder 52 and the circuit board 60. Thus, the height adjustment can be facilitated. Industrial applicability
- the capacitor sensor which can suppress deterioration of a frequency characteristic can be provided.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN038107880A CN1653850B (zh) | 2002-04-05 | 2003-04-04 | 电容传感器 |
EP03745915A EP1494503A4 (en) | 2002-04-05 | 2003-04-04 | CAPACITOR SENSOR |
JP2003583054A JP4264007B2 (ja) | 2002-04-05 | 2003-04-04 | コンデンサセンサ |
KR1020047015492A KR100966756B1 (ko) | 2002-04-05 | 2003-04-04 | 콘덴서 센서 |
US10/509,221 US6999596B2 (en) | 2002-04-05 | 2003-04-04 | Capacitor sensor |
AU2003236375A AU2003236375A1 (en) | 2002-04-05 | 2003-04-04 | Capacitor sensor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002103300 | 2002-04-05 | ||
JP2002-103300 | 2002-04-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003086013A1 true WO2003086013A1 (fr) | 2003-10-16 |
Family
ID=28786296
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/004328 WO2003086013A1 (fr) | 2002-04-05 | 2003-04-04 | Detecteur de capacites |
Country Status (7)
Country | Link |
---|---|
US (1) | US6999596B2 (ja) |
EP (1) | EP1494503A4 (ja) |
JP (1) | JP4264007B2 (ja) |
KR (1) | KR100966756B1 (ja) |
CN (1) | CN1653850B (ja) |
AU (1) | AU2003236375A1 (ja) |
WO (1) | WO2003086013A1 (ja) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007174622A (ja) * | 2005-11-25 | 2007-07-05 | Matsushita Electric Works Ltd | 音響センサ |
JP2007174635A (ja) * | 2005-11-25 | 2007-07-05 | Matsushita Electric Works Ltd | マイクロホンパッケージの製造方法及びマイクロホンパッケージ |
JP2007306216A (ja) * | 2006-05-10 | 2007-11-22 | Hosiden Corp | エレクトレットコンデンサマイクロホン |
WO2009084321A1 (ja) * | 2007-12-27 | 2009-07-09 | Hosiden Corporation | エレクトレットコンデンサマイクロホン |
JP2009224839A (ja) * | 2008-03-13 | 2009-10-01 | Audio Technica Corp | コンデンサーマイクロホン |
JP2010050868A (ja) * | 2008-08-25 | 2010-03-04 | Audio Technica Corp | コンデンサマイクロホンユニット |
CN1764328B (zh) * | 2004-10-18 | 2010-12-15 | 财团法人工业技术研究院 | 动态压力感测装置 |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100549189B1 (ko) * | 2003-07-29 | 2006-02-10 | 주식회사 비에스이 | Smd가능한 일렉트렛 콘덴서 마이크로폰 |
JP4310234B2 (ja) * | 2004-05-18 | 2009-08-05 | 株式会社オーディオテクニカ | コンデンサマイクロホン |
JP4486863B2 (ja) * | 2004-08-18 | 2010-06-23 | 株式会社オーディオテクニカ | コンデンサマイクロホンユニット |
JP4188325B2 (ja) * | 2005-02-09 | 2008-11-26 | ホシデン株式会社 | 防塵板内蔵マイクロホン |
JPWO2006132193A1 (ja) * | 2005-06-06 | 2009-01-08 | 松下電器産業株式会社 | コンデンサマイクロホンのエレクトレット化方法、エレクトレット化装置およびこれを用いたコンデンサマイクロホンの製造方法 |
CN101005718B (zh) * | 2006-01-16 | 2011-04-20 | 财团法人工业技术研究院 | 微型声学传感器及其制造方法 |
JP4245625B2 (ja) | 2006-09-29 | 2009-03-25 | ホシデン株式会社 | エレクトレットコンデンサマイクロホン |
JP4328347B2 (ja) | 2006-11-10 | 2009-09-09 | ホシデン株式会社 | マイクロホン及びその実装構造 |
JP2008187581A (ja) * | 2007-01-31 | 2008-08-14 | Audio Technica Corp | バウンダリーマイクロホン |
US8300858B2 (en) * | 2007-09-27 | 2012-10-30 | Yamaha Corporation | Electrostatic speaker |
US8850893B2 (en) * | 2007-12-05 | 2014-10-07 | Valtion Teknillinen Tutkimuskeskus | Device for measuring pressure, variation in acoustic pressure, a magnetic field, acceleration, vibration, or the composition of a gas |
CN101257737B (zh) * | 2008-03-01 | 2012-07-25 | 歌尔声学股份有限公司 | 微型电容式麦克风 |
US20090279717A1 (en) * | 2008-05-12 | 2009-11-12 | Udid Technology Co., Ltd. | Circuit module for a condenser microphone |
US8411882B2 (en) | 2008-10-31 | 2013-04-02 | Htc Corporation | Electronic device with electret electro-acoustic transducer |
CN101742388B (zh) * | 2008-11-10 | 2013-07-31 | 宏达国际电子股份有限公司 | 具有驻极体式电声换能器的电子装置 |
JP5325555B2 (ja) * | 2008-12-05 | 2013-10-23 | 船井電機株式会社 | マイクロホンユニット |
TWI405474B (zh) | 2008-12-31 | 2013-08-11 | Htc Corp | 可撓式冷光電聲致動器及使用該可撓式冷光電聲致動器之電子裝置 |
JP5404220B2 (ja) * | 2009-07-09 | 2014-01-29 | 株式会社オーディオテクニカ | コンデンサマイクロホン |
KR101096546B1 (ko) * | 2009-11-10 | 2011-12-22 | 주식회사 비에스이 | 정전형 스피커 |
KR20160006336A (ko) | 2014-07-08 | 2016-01-19 | 삼성디스플레이 주식회사 | 트랜스듀서 및 이를 포함하는 전자 기기 |
KR101601120B1 (ko) * | 2014-10-17 | 2016-03-08 | 현대자동차주식회사 | 마이크로폰 및 그 제조 방법 |
US10610326B2 (en) * | 2015-06-05 | 2020-04-07 | Cianna Medical, Inc. | Passive tags, and systems and methods for using them |
JP6649049B2 (ja) | 2015-11-12 | 2020-02-19 | 株式会社オーディオテクニカ | コンデンサマイクロホンユニットとコンデンサマイクロホンとコンデンサマイクロホンの製造方法 |
CN107515015A (zh) * | 2016-06-15 | 2017-12-26 | 苏州宝时得电动工具有限公司 | 电容传感器及割草机 |
ES2971276T3 (es) | 2016-04-06 | 2024-06-04 | Cianna Medical Inc | Marcadores reflectantes y sistemas para identificarlos y localizarlos |
WO2018175667A1 (en) | 2017-03-21 | 2018-09-27 | Cianna Medical, Inc. | Reflector markers and systems and methods for identifying and locating them |
US11883150B2 (en) | 2018-09-06 | 2024-01-30 | Cianna Medical, Inc. | Systems for identifying and locating reflectors using orthogonal sequences of reflector switching |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61247199A (ja) * | 1985-04-25 | 1986-11-04 | Matsushita Electric Ind Co Ltd | エレクトレツトコンデンサマイクロホン |
JPH0496199U (ja) * | 1990-08-20 | 1992-08-20 | ||
EP0531613A2 (en) | 1991-09-09 | 1993-03-17 | Hosiden Corporation | Electret condenser microphone unit |
JPH11266499A (ja) * | 1998-03-18 | 1999-09-28 | Hosiden Corp | エレクトレットコンデンサマイクロホン |
JP2000115895A (ja) * | 1998-03-23 | 2000-04-21 | Hosiden Corp | エレクトレットコンデンサマイクロホン及びその製造方法 |
JP2001112094A (ja) * | 1999-10-04 | 2001-04-20 | Sanyo Electric Co Ltd | 半導体装置 |
JP2001145196A (ja) | 1999-11-12 | 2001-05-25 | Hosiden Corp | フロントエレクトレット型コンデンサマイクロホン |
JP2001352596A (ja) * | 2000-06-08 | 2001-12-21 | Matsushita Electric Ind Co Ltd | コンデンサマイク装置 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4533795A (en) * | 1983-07-07 | 1985-08-06 | American Telephone And Telegraph | Integrated electroacoustic transducer |
JP3326767B2 (ja) * | 1996-09-25 | 2002-09-24 | ホシデン株式会社 | エレクトレツト型マイクロフォン |
JP2002101497A (ja) * | 2000-09-21 | 2002-04-05 | Matsushita Electric Ind Co Ltd | エレクトレットコンデンサマイクロホン及びその製造方法 |
AT409695B (de) * | 2001-05-18 | 2002-10-25 | Akg Acoustics Gmbh | Elektrostatisches mikrofon |
-
2003
- 2003-04-04 WO PCT/JP2003/004328 patent/WO2003086013A1/ja active Application Filing
- 2003-04-04 AU AU2003236375A patent/AU2003236375A1/en not_active Abandoned
- 2003-04-04 JP JP2003583054A patent/JP4264007B2/ja not_active Expired - Fee Related
- 2003-04-04 CN CN038107880A patent/CN1653850B/zh not_active Expired - Fee Related
- 2003-04-04 KR KR1020047015492A patent/KR100966756B1/ko active IP Right Grant
- 2003-04-04 US US10/509,221 patent/US6999596B2/en not_active Expired - Lifetime
- 2003-04-04 EP EP03745915A patent/EP1494503A4/en not_active Withdrawn
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61247199A (ja) * | 1985-04-25 | 1986-11-04 | Matsushita Electric Ind Co Ltd | エレクトレツトコンデンサマイクロホン |
JPH0496199U (ja) * | 1990-08-20 | 1992-08-20 | ||
EP0531613A2 (en) | 1991-09-09 | 1993-03-17 | Hosiden Corporation | Electret condenser microphone unit |
JPH11266499A (ja) * | 1998-03-18 | 1999-09-28 | Hosiden Corp | エレクトレットコンデンサマイクロホン |
JP2000115895A (ja) * | 1998-03-23 | 2000-04-21 | Hosiden Corp | エレクトレットコンデンサマイクロホン及びその製造方法 |
JP2001112094A (ja) * | 1999-10-04 | 2001-04-20 | Sanyo Electric Co Ltd | 半導体装置 |
JP2001145196A (ja) | 1999-11-12 | 2001-05-25 | Hosiden Corp | フロントエレクトレット型コンデンサマイクロホン |
JP2001352596A (ja) * | 2000-06-08 | 2001-12-21 | Matsushita Electric Ind Co Ltd | コンデンサマイク装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1494503A4 * |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1764328B (zh) * | 2004-10-18 | 2010-12-15 | 财团法人工业技术研究院 | 动态压力感测装置 |
JP2007174622A (ja) * | 2005-11-25 | 2007-07-05 | Matsushita Electric Works Ltd | 音響センサ |
JP2007174635A (ja) * | 2005-11-25 | 2007-07-05 | Matsushita Electric Works Ltd | マイクロホンパッケージの製造方法及びマイクロホンパッケージ |
JP4655017B2 (ja) * | 2005-11-25 | 2011-03-23 | パナソニック電工株式会社 | 音響センサ |
JP2007306216A (ja) * | 2006-05-10 | 2007-11-22 | Hosiden Corp | エレクトレットコンデンサマイクロホン |
WO2009084321A1 (ja) * | 2007-12-27 | 2009-07-09 | Hosiden Corporation | エレクトレットコンデンサマイクロホン |
JP2009159463A (ja) * | 2007-12-27 | 2009-07-16 | Hosiden Corp | エレクトレットコンデンサマイクロホン |
KR101510167B1 (ko) * | 2007-12-27 | 2015-04-08 | 호시덴 가부시기가이샤 | 일렉트릿 컨덴서 마이크로폰 |
JP2009224839A (ja) * | 2008-03-13 | 2009-10-01 | Audio Technica Corp | コンデンサーマイクロホン |
US8126165B2 (en) | 2008-03-13 | 2012-02-28 | Kabushiki Kaisha Audio-Technica | Condenser microphone |
JP2010050868A (ja) * | 2008-08-25 | 2010-03-04 | Audio Technica Corp | コンデンサマイクロホンユニット |
Also Published As
Publication number | Publication date |
---|---|
US6999596B2 (en) | 2006-02-14 |
EP1494503A4 (en) | 2009-09-23 |
AU2003236375A1 (en) | 2003-10-20 |
JP4264007B2 (ja) | 2009-05-13 |
KR20040105820A (ko) | 2004-12-16 |
EP1494503A1 (en) | 2005-01-05 |
JPWO2003086013A1 (ja) | 2005-08-18 |
KR100966756B1 (ko) | 2010-06-29 |
CN1653850A (zh) | 2005-08-10 |
US20050163336A1 (en) | 2005-07-28 |
CN1653850B (zh) | 2010-07-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2003086013A1 (fr) | Detecteur de capacites | |
DK1303164T3 (en) | Microphone with a flexible printed circuit board for mounting components | |
US20130044899A1 (en) | Dual Backplate Microphone | |
US20100046780A1 (en) | Directional silicon condensor microphone having additional back chamber | |
JP2001268695A (ja) | エレクトレットコンデンサマイクロホン | |
WO2007126179A1 (en) | Silicon condenser microphone having additional back chamber | |
US20090097687A1 (en) | Diaphragm for a Condenser Microphone | |
TW200945915A (en) | Electret condenser microphone | |
US20080025532A1 (en) | Microphone case and condenser microphone | |
US9003637B2 (en) | Method of manufacturing a microphone assembly | |
KR100673846B1 (ko) | 와셔스프링을 가지는 일렉트릿 마이크로폰 | |
US20020172389A1 (en) | Electrostatic Microphone | |
TW201127087A (en) | Floating type condenser microphone assembly | |
JP3472502B2 (ja) | 半導体エレクトレットコンデンサマイクロホン | |
TW201332378A (zh) | 駐極體電容麥克風 | |
JP3574601B2 (ja) | 半導体エレクトレットコンデンサマイクロホン | |
KR100464700B1 (ko) | 지향성 콘덴서 마이크로폰 | |
JP2008211466A (ja) | マイクロホン用パッケージ、マイクロホン搭載体、マイクロホン装置 | |
JP2002335599A (ja) | マイクロホンとその製造方法 | |
KR20090119268A (ko) | 실리콘 콘덴서 마이크로폰 및 이에 사용되는 실리콘칩의제조방법 | |
KR100544277B1 (ko) | 단차를 형성한 케이스 및 이를 이용한 일렉트릿 콘덴서마이크로폰 | |
KR101593926B1 (ko) | 멀티미디어 기기에 장착되는 메인보드의 마이크로폰 실장 구조 | |
KR100776192B1 (ko) | 진동판 및 이를 포함하는 콘덴서 마이크로폰 | |
JPH0523698U (ja) | エレクトレツトコンデンサマイクロホンユニツト | |
KR200382795Y1 (ko) | 음향 센서를 사용한 일렉트릭트 마이크로폰과 반도체 마이크로폰 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE 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 NO NZ OM PH PL PT RO RU SC SD SE SG SK SL 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): GH GM KE LS MW MZ 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 IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
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: 2003583054 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 10509221 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2003745915 Country of ref document: EP Ref document number: 1020047015492 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 20038107880 Country of ref document: CN |
|
WWP | Wipo information: published in national office |
Ref document number: 1020047015492 Country of ref document: KR |
|
WWP | Wipo information: published in national office |
Ref document number: 2003745915 Country of ref document: EP |