JPS55166400A - Capacitor microphone - Google Patents
Capacitor microphoneInfo
- Publication number
- JPS55166400A JPS55166400A JP7500879A JP7500879A JPS55166400A JP S55166400 A JPS55166400 A JP S55166400A JP 7500879 A JP7500879 A JP 7500879A JP 7500879 A JP7500879 A JP 7500879A JP S55166400 A JPS55166400 A JP S55166400A
- Authority
- JP
- Japan
- Prior art keywords
- fet22
- film
- capacitor microphone
- coat
- semiconductor device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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
- H04R19/04—Microphones
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
PURPOSE:To realize an extremely simple structure and the manufacture of a low cost for the capacitor microphone, by forming a plane of the semiconductor device with the metal plate which forms an end face of the capacity element in opposition to the conductive film and at the same time securing an electric contact between the metal plate and the gate electrode. CONSTITUTION:FET22 is fixed by being insulated from Al case 27 via insulator material 26, and metal film 23 of FET22 is used directly as the back electrode. In other words, electret film 24 forms a capacitor between coat 23 and film 24 and via spacer 25, and the input signal is supplied through the gate electrode of FET22 with an electric contact secured to coat 23. And thus the output is obtained through source and drain terminals 15 and 16 each in accordance with the input signal. Back room 21 formed at the center of FET22 functions to give the control to the sound quality properties and is formed with the knockout pin and at the molding time. In such way, the semiconductor device for electret capacitor microphone can be produced in an extremely simple way, at the same time realizing a miniature structure and a low cost.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7500879A JPS55166400A (en) | 1979-06-14 | 1979-06-14 | Capacitor microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7500879A JPS55166400A (en) | 1979-06-14 | 1979-06-14 | Capacitor microphone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55166400A true JPS55166400A (en) | 1980-12-25 |
| JPS633516B2 JPS633516B2 (en) | 1988-01-25 |
Family
ID=13563730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7500879A Granted JPS55166400A (en) | 1979-06-14 | 1979-06-14 | Capacitor microphone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55166400A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61232799A (en) * | 1985-04-09 | 1986-10-17 | Matsushita Electric Ind Co Ltd | Electret capacitor microphone |
| EP0331992A2 (en) * | 1988-03-05 | 1989-09-13 | Sennheiser Electronic Kg | Capacitive sound transducer |
-
1979
- 1979-06-14 JP JP7500879A patent/JPS55166400A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61232799A (en) * | 1985-04-09 | 1986-10-17 | Matsushita Electric Ind Co Ltd | Electret capacitor microphone |
| EP0331992A2 (en) * | 1988-03-05 | 1989-09-13 | Sennheiser Electronic Kg | Capacitive sound transducer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS633516B2 (en) | 1988-01-25 |
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