BE774468A - Fabrication d'elements de transducteur a electrets par application d'unchamp electrique commande - Google Patents

Fabrication d'elements de transducteur a electrets par application d'unchamp electrique commande

Info

Publication number
BE774468A
BE774468A BE774468A BE774468A BE774468A BE 774468 A BE774468 A BE 774468A BE 774468 A BE774468 A BE 774468A BE 774468 A BE774468 A BE 774468A BE 774468 A BE774468 A BE 774468A
Authority
BE
Belgium
Prior art keywords
manufacturing
application
electrical control
control field
transducer elements
Prior art date
Application number
BE774468A
Other languages
English (en)
French (fr)
Inventor
G M Sessler
J E West
Original Assignee
Western Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Western Electric Co filed Critical Western Electric Co
Publication of BE774468A publication Critical patent/BE774468A/xx

Links

Classifications

    • 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
    • H01G7/025—Electrets, i.e. having a permanently-polarised dielectric having an inorganic dielectric
    • H01G7/026—Electrets, i.e. having a permanently-polarised dielectric having an inorganic dielectric with ceramic dielectric
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49005—Acoustic transducer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12431—Foil or filament smaller than 6 mils
    • Y10T428/12438—Composite

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
BE774468A 1970-11-02 1971-10-26 Fabrication d'elements de transducteur a electrets par application d'unchamp electrique commande BE774468A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US8588270A 1970-11-02 1970-11-02

Publications (1)

Publication Number Publication Date
BE774468A true BE774468A (fr) 1972-02-14

Family

ID=22194584

Family Applications (1)

Application Number Title Priority Date Filing Date
BE774468A BE774468A (fr) 1970-11-02 1971-10-26 Fabrication d'elements de transducteur a electrets par application d'unchamp electrique commande

Country Status (10)

Country Link
US (1) US3705312A (it)
JP (1) JPS5541014B1 (it)
AT (1) AT323297B (it)
BE (1) BE774468A (it)
DE (1) DE2153784C3 (it)
FR (1) FR2113400A5 (it)
GB (1) GB1363717A (it)
IT (1) IT940095B (it)
NL (1) NL162778C (it)
SE (1) SE366608B (it)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5220851B1 (it) * 1969-12-11 1977-06-07
FR2144933A5 (it) * 1971-07-02 1973-02-16 Anvar
US3809828A (en) * 1972-01-17 1974-05-07 Gte Laboratories Inc Electret transducing device
US3786495A (en) * 1972-05-17 1974-01-15 Ncr Stored charge transducer
US3868624A (en) * 1972-12-29 1975-02-25 Us Navy Apparatus for mapping acoustic fields
GB2072458A (en) * 1980-03-03 1981-09-30 Tape Developments Ltd C Electroacoustic transducers
GB2079056B (en) * 1980-06-30 1985-04-17 Tokyo Shibaura Electric Co Electret device
US4382196A (en) * 1981-03-16 1983-05-03 Gte Products Corporation Tape transducer
JPS57188105A (en) * 1981-05-14 1982-11-19 Toshiba Corp Electret constituent
US4527218A (en) * 1981-06-08 1985-07-02 At&T Bell Laboratories Stable positively charged Teflon electrets
US4512941A (en) * 1983-02-14 1985-04-23 At&T Bell Laboratories Polarizing of piezoelectric material
US4808849A (en) * 1987-02-03 1989-02-28 Canadian Patents And Development Limited/Societe Canadienne Des Brevets Et D'exploitation Limitee Phyllosilicate electrets and a method for their manufacture
WO1993001691A1 (en) * 1991-07-11 1993-01-21 Driver Michael L Electrolytic loudspeaker assembly
US5388163A (en) * 1991-12-23 1995-02-07 At&T Corp. Electret transducer array and fabrication technique
US5862239A (en) * 1997-04-03 1999-01-19 Lucent Technologies Inc. Directional capacitor microphone system
US6833687B2 (en) * 2003-04-18 2004-12-21 Agilent Technologies, Inc. Electromechanical power converter
US7525205B2 (en) * 2006-07-28 2009-04-28 Sanyo Electric Co., Ltd. Electric power generator
KR101096546B1 (ko) * 2009-11-10 2011-12-22 주식회사 비에스이 정전형 스피커
TWM395976U (en) * 2010-06-30 2011-01-01 Tsung-Hung Wu Electret electroacoustic transducer
DE102013217312B4 (de) 2013-08-30 2016-06-30 Robert Bosch Gmbh Kapazitives MEMS-Bauelement mit einer druckempfindlichen Membran
DE102013221140A1 (de) * 2013-10-17 2015-04-23 Robert Bosch Gmbh Elektretstruktur
US10958191B2 (en) 2018-02-15 2021-03-23 The Charles Stark Draper Laboratory, Inc. Electrostatic motor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5225560A (en) * 1975-08-20 1977-02-25 Sharp Corp Gate signal feeding method of gto thyristor

Also Published As

Publication number Publication date
AT323297B (de) 1975-07-10
GB1363717A (en) 1974-08-14
NL162778C (nl) 1980-06-16
DE2153784C3 (de) 1975-07-17
FR2113400A5 (it) 1972-06-23
IT940095B (it) 1973-02-10
NL162778B (nl) 1980-01-15
JPS5541014B1 (it) 1980-10-21
SE366608B (it) 1974-04-29
US3705312A (en) 1972-12-05
NL7114561A (it) 1972-05-04
DE2153784B2 (de) 1974-10-24
DE2153784A1 (de) 1972-05-25

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: WESTERN ELECTRIC CY INC.

Effective date: 19881031