FR2194028A1 - - Google Patents

Info

Publication number
FR2194028A1
FR2194028A1 FR7326310A FR7326310A FR2194028A1 FR 2194028 A1 FR2194028 A1 FR 2194028A1 FR 7326310 A FR7326310 A FR 7326310A FR 7326310 A FR7326310 A FR 7326310A FR 2194028 A1 FR2194028 A1 FR 2194028A1
Authority
FR
France
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
Application number
FR7326310A
Other languages
French (fr)
Other versions
FR2194028B1 (xx
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2194028A1 publication Critical patent/FR2194028A1/fr
Application granted granted Critical
Publication of FR2194028B1 publication Critical patent/FR2194028B1/fr
Expired legal-status Critical Current

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
    • H04R19/01—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)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Laminated Bodies (AREA)
FR7326310A 1972-07-21 1973-07-18 Expired FR2194028B1 (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7210088A NL7210088A (xx) 1972-07-21 1972-07-21

Publications (2)

Publication Number Publication Date
FR2194028A1 true FR2194028A1 (xx) 1974-02-22
FR2194028B1 FR2194028B1 (xx) 1977-02-18

Family

ID=19816577

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7326310A Expired FR2194028B1 (xx) 1972-07-21 1973-07-18

Country Status (8)

Country Link
JP (2) JPS4946426A (xx)
AT (1) AT326197B (xx)
DE (1) DE2333418C2 (xx)
FR (1) FR2194028B1 (xx)
GB (1) GB1394347A (xx)
IN (1) IN139061B (xx)
IT (1) IT991799B (xx)
NL (1) NL7210088A (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0022630A1 (en) * 1979-07-06 1981-01-21 The Post Office Method and apparatus for implanting a charge in an electret foil

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL179104C (nl) * 1974-03-15 1986-07-01 Philips Nv Elektrostatische transducent.
JPS5112125A (ja) * 1974-07-19 1976-01-30 Matsushita Electric Ind Co Ltd Erekutoretsutodenkionkyohenkanki
SE382297B (sv) * 1974-08-15 1976-01-19 Ericsson Telefon Ab L M Forfarande for framstellning av en elektretmikrofon med ett noggrant bestemt luftgap.
JPS5430300B1 (xx) * 1975-01-21 1979-09-29
JPS5814317B2 (ja) * 1976-04-20 1983-03-18 松下電器産業株式会社 電気感応記録紙
FI20070155A0 (fi) 2007-02-23 2007-02-23 Panphonics Oy Elektreettilevyrakenne
DE102008013942A1 (de) * 2008-03-12 2009-09-17 Nanogate Ag Beschichtete Kunststofffolie

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2044877A1 (de) * 1969-09-10 1971-03-25 Kureha Chemical Ind Co Ltd Ferrodielektnkum mit verbesserter Stabilität und Verfahren zu dessen Herstellung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1789091B2 (de) * 1967-05-15 1974-04-04 Thermo Electron Corp., Waltham, Mass. (V.St.A.) Elektret sowie Verfahren und Vorrichtung zu seiner Herstellung. Ausscheidung aus: 1639444
NL143362B (nl) * 1968-07-10 1974-09-16 Tno Werkwijze voor het formeren van een eenzijdig gemetalliseerde elektreetfoelie, alsmede zulk een elektreetfoelie geformeerd volgens deze werkwijze.
JPS4857614A (xx) * 1971-11-17 1973-08-13

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2044877A1 (de) * 1969-09-10 1971-03-25 Kureha Chemical Ind Co Ltd Ferrodielektnkum mit verbesserter Stabilität und Verfahren zu dessen Herstellung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0022630A1 (en) * 1979-07-06 1981-01-21 The Post Office Method and apparatus for implanting a charge in an electret foil

Also Published As

Publication number Publication date
JPS4946426A (xx) 1974-05-04
IN139061B (xx) 1976-05-01
IT991799B (it) 1975-08-30
GB1394347A (en) 1975-05-14
ATA633673A (de) 1975-02-15
JPS55133699U (xx) 1980-09-22
NL7210088A (xx) 1974-01-23
AT326197B (de) 1975-11-25
FR2194028B1 (xx) 1977-02-18
DE2333418A1 (de) 1974-01-31
DE2333418C2 (de) 1985-01-10

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Legal Events

Date Code Title Description
ST Notification of lapse