DE2232264A1 - Elektret - Google Patents

Elektret

Info

Publication number
DE2232264A1
DE2232264A1 DE2232264A DE2232264A DE2232264A1 DE 2232264 A1 DE2232264 A1 DE 2232264A1 DE 2232264 A DE2232264 A DE 2232264A DE 2232264 A DE2232264 A DE 2232264A DE 2232264 A1 DE2232264 A1 DE 2232264A1
Authority
DE
Germany
Prior art keywords
film
electret
fluid
dielectric
layer
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
Application number
DE2232264A
Other languages
German (de)
English (en)
Inventor
Danielle Nee Bulwa
Jacques Lewiner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bpifrance Financement SA
Original Assignee
Agence National de Valorisation de la Recherche ANVAR
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 Agence National de Valorisation de la Recherche ANVAR filed Critical Agence National de Valorisation de la Recherche ANVAR
Publication of DE2232264A1 publication Critical patent/DE2232264A1/de
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/01—Electrostatic transducers characterised by the use of electrets
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Filtering Materials (AREA)
DE2232264A 1971-07-02 1972-06-30 Elektret Pending DE2232264A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7124291A FR2144933A5 (enExample) 1971-07-02 1971-07-02

Publications (1)

Publication Number Publication Date
DE2232264A1 true DE2232264A1 (de) 1973-01-11

Family

ID=9079744

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2232264A Pending DE2232264A1 (de) 1971-07-02 1972-06-30 Elektret

Country Status (4)

Country Link
US (1) US3851183A (enExample)
DE (1) DE2232264A1 (enExample)
FR (1) FR2144933A5 (enExample)
GB (1) GB1395256A (enExample)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2432377A1 (de) * 1973-07-05 1975-01-23 Sony Corp Verfahren zur herstellung eines elektrets
DE2729904A1 (de) * 1976-07-05 1978-01-12 Inst Francais Du Petrol Verfahren und vorrichtung zur herstellung empfindlicher elemente mit fester elektrischer vorspannung
DE3033162A1 (de) * 1979-09-04 1981-03-12 Union Carbide Corp., 10017 New York, N.Y. Polymerelektreten und verfahren zu ihrer herstellung.
AT380126B (de) * 1978-02-06 1986-04-10 Minnesota Mining & Mfg Elektret in form von fasrigem bahnmaterial mit eine permanente elektrische ladung tragenden fasern
DE102013221140A1 (de) 2013-10-17 2015-04-23 Robert Bosch Gmbh Elektretstruktur

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5419172B2 (enExample) * 1973-07-23 1979-07-13
US4023155A (en) * 1975-12-23 1977-05-10 Gte Sylvania Incorporated Ultrasonic tape intrusion detection system
US4041446A (en) * 1976-05-20 1977-08-09 The United States Of America As Represented By The Secretary Of The Navy Capacitive-type displacement and pressure sensitive transducer
NL7802688A (nl) * 1978-03-13 1979-09-17 Philips Nv Inrichting voor het omzetten van akoestische in elektrische trillingen en omgekeerd, voor- zien van tenminste een kondensator elektreet- element aangesloten op een elektronische schakeling.
US4397702A (en) * 1980-01-09 1983-08-09 Johnson Controls, Inc. Fabrication of non-conductive charged sensing probe unit
CA1277415C (en) * 1986-04-11 1990-12-04 Lorne A. Whitehead Elastomer membrane enhanced electrostatic transducer
FI116873B (fi) * 1996-02-26 2006-03-15 Panphonics Oy Akustinen elementti ja menetelmä äänen käsittelemiseksi

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3354373A (en) * 1964-05-14 1967-11-21 Northern Electric Co Fixture for use during the polarization of an electret
US3588382A (en) * 1967-10-11 1971-06-28 Northern Electric Co Directional electret transducer
US3748727A (en) * 1968-07-11 1973-07-31 W Swain Method of making electret transducers
US3705312A (en) * 1970-11-02 1972-12-05 Bell Telephone Labor Inc Preparation of electret transducer elements by application of controlled breakdown electric field

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2432377A1 (de) * 1973-07-05 1975-01-23 Sony Corp Verfahren zur herstellung eines elektrets
DE2729904A1 (de) * 1976-07-05 1978-01-12 Inst Francais Du Petrol Verfahren und vorrichtung zur herstellung empfindlicher elemente mit fester elektrischer vorspannung
AT380126B (de) * 1978-02-06 1986-04-10 Minnesota Mining & Mfg Elektret in form von fasrigem bahnmaterial mit eine permanente elektrische ladung tragenden fasern
DE3033162A1 (de) * 1979-09-04 1981-03-12 Union Carbide Corp., 10017 New York, N.Y. Polymerelektreten und verfahren zu ihrer herstellung.
DE102013221140A1 (de) 2013-10-17 2015-04-23 Robert Bosch Gmbh Elektretstruktur

Also Published As

Publication number Publication date
GB1395256A (en) 1975-05-21
US3851183A (en) 1974-11-26
FR2144933A5 (enExample) 1973-02-16

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Legal Events

Date Code Title Description
OHA Expiration of time for request for examination