JPS57188105A - Electret constituent - Google Patents
Electret constituentInfo
- Publication number
- JPS57188105A JPS57188105A JP56072620A JP7262081A JPS57188105A JP S57188105 A JPS57188105 A JP S57188105A JP 56072620 A JP56072620 A JP 56072620A JP 7262081 A JP7262081 A JP 7262081A JP S57188105 A JPS57188105 A JP S57188105A
- Authority
- JP
- Japan
- Prior art keywords
- metallic layer
- electret
- laminated
- insulated
- constituent
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
- H01G7/021—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric
- H01G7/023—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric of macromolecular compounds
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56072620A JPS57188105A (en) | 1981-05-14 | 1981-05-14 | Electret constituent |
GB8213173A GB2098803B (en) | 1981-05-14 | 1982-05-06 | Electret device |
US06/377,798 US4458161A (en) | 1981-05-14 | 1982-05-13 | Electret device |
DE19823218081 DE3218081A1 (de) | 1981-05-14 | 1982-05-13 | Elektretvorrichtung |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56072620A JPS57188105A (en) | 1981-05-14 | 1981-05-14 | Electret constituent |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57188105A true JPS57188105A (en) | 1982-11-19 |
Family
ID=13494602
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56072620A Pending JPS57188105A (en) | 1981-05-14 | 1981-05-14 | Electret constituent |
Country Status (4)
Country | Link |
---|---|
US (1) | US4458161A (ja) |
JP (1) | JPS57188105A (ja) |
DE (1) | DE3218081A1 (ja) |
GB (1) | GB2098803B (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4704556A (en) * | 1983-12-05 | 1987-11-03 | Leslie Kay | Transducers |
FR2705827B1 (fr) * | 1993-05-26 | 1995-08-11 | Lewiner Jacques | Perfectionnements aux dispositifs de fabrication des électrets et aux électrets obtenus. |
FI108204B (fi) * | 1999-11-25 | 2001-11-30 | Kari Johannes Kirjavainen | Kalvo energioiden muuntamiseksi |
US7136496B2 (en) * | 2001-04-18 | 2006-11-14 | Sonion Nederland B.V. | Electret assembly for a microphone having a backplate with improved charge stability |
US8280082B2 (en) * | 2002-10-08 | 2012-10-02 | Sonion Nederland B.V. | Electret assembly for a microphone having a backplate with improved charge stability |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1639444B2 (de) * | 1967-05-15 | 1972-08-03 | Thermo Electron Engineering Corp., Waltham, Mass. (V.StA.) | Elektroakustischer wandler |
US3588640A (en) * | 1969-11-28 | 1971-06-28 | Sprague Electric Co | High capacitance variable capacitor |
JPS4948119B1 (ja) * | 1969-12-19 | 1974-12-19 | ||
DE2044180A1 (de) * | 1970-09-05 | 1972-03-16 | Philips Patentverwaltung | Daueraufzeichnungsschablone für elektrostatische Drucker |
US3705312A (en) * | 1970-11-02 | 1972-12-05 | Bell Telephone Labor Inc | Preparation of electret transducer elements by application of controlled breakdown electric field |
JPS5651379B1 (ja) * | 1971-04-07 | 1981-12-04 | ||
CA992738A (en) * | 1971-04-08 | 1976-07-13 | Naohiro Murayama | Pyroelectric element of polymer film |
US3751612A (en) * | 1971-08-30 | 1973-08-07 | Colorado Instr Inc | Snap action capacitive type switch |
SE378500B (ja) * | 1971-11-08 | 1975-09-01 | Industrial Research Prod Inc | |
US3816671A (en) * | 1972-04-06 | 1974-06-11 | Thermo Electron Corp | Electret transducer cartridge and case |
US3821491A (en) * | 1972-05-15 | 1974-06-28 | Amperex Electronic Corp | Microphone construction |
JPS5632772B2 (ja) * | 1973-10-22 | 1981-07-30 | ||
JPS5818787B2 (ja) * | 1974-09-03 | 1983-04-14 | 呉羽化学工業株式会社 | コウブンシフイルムデンキソシ ノ セイゾウホウホウ |
JPS5130997A (en) * | 1974-09-11 | 1976-03-16 | Kureha Chemical Ind Co Ltd | Kobunshifuirumu no renzokuseikyokuhoho |
JPS6051279B2 (ja) * | 1977-10-19 | 1985-11-13 | 呉羽化学工業株式会社 | 熱可塑性樹脂圧電性焦電性フイルムの成極方法 |
DE2915165A1 (de) * | 1978-05-05 | 1979-11-15 | Gaf Corp | Zeichenfilm, auf dem elektrostatisch ein bild erzeugt werden kann |
GB2079054B (en) * | 1980-06-30 | 1984-02-22 | Tokyo Shibaura Electric Co | Electret device |
GB2079056B (en) * | 1980-06-30 | 1985-04-17 | Tokyo Shibaura Electric Co | Electret device |
GB2079055B (en) * | 1980-06-30 | 1985-02-20 | Tokyo Shibaura Electric Co | Electret device |
-
1981
- 1981-05-14 JP JP56072620A patent/JPS57188105A/ja active Pending
-
1982
- 1982-05-06 GB GB8213173A patent/GB2098803B/en not_active Expired
- 1982-05-13 US US06/377,798 patent/US4458161A/en not_active Expired - Fee Related
- 1982-05-13 DE DE19823218081 patent/DE3218081A1/de not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
GB2098803A (en) | 1982-11-24 |
DE3218081A1 (de) | 1982-12-16 |
US4458161A (en) | 1984-07-03 |
GB2098803B (en) | 1984-11-07 |
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