GB1504314A - Electrostatic transducer - Google Patents

Electrostatic transducer

Info

Publication number
GB1504314A
GB1504314A GB10306/75A GB1030675A GB1504314A GB 1504314 A GB1504314 A GB 1504314A GB 10306/75 A GB10306/75 A GB 10306/75A GB 1030675 A GB1030675 A GB 1030675A GB 1504314 A GB1504314 A GB 1504314A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
electret
fixed electrode
march
metal 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.)
Expired
Application number
GB10306/75A
Other languages
English (en)
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.)
PHILIPS Ltd
Original Assignee
PHILIPS Ltd
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 Ltd filed Critical PHILIPS Ltd
Publication of GB1504314A publication Critical patent/GB1504314A/en
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)
GB10306/75A 1974-03-15 1975-03-12 Electrostatic transducer Expired GB1504314A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NLAANVRAGE7403471,A NL179104C (nl) 1974-03-15 1974-03-15 Elektrostatische transducent.

Publications (1)

Publication Number Publication Date
GB1504314A true GB1504314A (en) 1978-03-15

Family

ID=19820964

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10306/75A Expired GB1504314A (en) 1974-03-15 1975-03-12 Electrostatic transducer

Country Status (7)

Country Link
US (1) US4016375A (enExample)
JP (1) JPS5951199B2 (enExample)
AT (1) AT332464B (enExample)
DE (1) DE2510279C2 (enExample)
FR (1) FR2289089A1 (enExample)
GB (1) GB1504314A (enExample)
NL (1) NL179104C (enExample)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6726994B1 (en) * 1998-11-18 2004-04-27 Daikin Industries, Ltd. Structural member of fluorine-containing polymer having adhesive property at high temperature and sliding material produced by using same
US8559660B2 (en) * 2007-07-12 2013-10-15 Industrial Technology Research Institute Electrostatic electroacoustic transducers
ES2401944T3 (es) * 2007-12-06 2013-04-25 3M Innovative Properties Company Bandas de electreto con aditivos mejoradores de la carga eléctrica
US7765698B2 (en) * 2008-06-02 2010-08-03 3M Innovative Properties Company Method of making electret articles based on zeta potential
WO2009148747A2 (en) * 2008-06-02 2009-12-10 3M Innovative Properties Company Charge-enhancing additives for electrets
BRPI0909959B1 (pt) * 2008-06-02 2018-11-13 3M Innovative Properties Co manta de eletreto e meio de filtro à base de eletreto
EP2303770B1 (en) * 2008-06-30 2014-07-09 3M Innovative Properties Company Method for in situ formation of metal nanoclusters within a porous substrate
EP2398956A2 (en) 2009-02-20 2011-12-28 3M Innovative Properties Company Antimicrobial electret web
TWI708473B (zh) * 2019-09-27 2020-10-21 華碩電腦股份有限公司 致動器

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3711941A (en) * 1970-11-02 1973-01-23 Bell Telephone Labor Inc Fabrication of electret transducer elements using low energy electron beam
US3770711A (en) * 1972-01-31 1973-11-06 Du Pont Oriented structures of tetrafluoroethylene/perfluoro (alkyl vinyl ether) copolymer
NL7210088A (enExample) * 1972-07-21 1974-01-23

Also Published As

Publication number Publication date
JPS50128520A (enExample) 1975-10-09
AT332464B (de) 1976-09-27
NL179104B (nl) 1986-02-03
US4016375A (en) 1977-04-05
FR2289089B3 (enExample) 1977-11-18
NL7403471A (nl) 1975-09-17
ATA189775A (de) 1976-01-15
JPS5951199B2 (ja) 1984-12-12
DE2510279C2 (de) 1982-04-15
NL179104C (nl) 1986-07-01
FR2289089A1 (fr) 1976-05-21
DE2510279A1 (de) 1975-09-18
USB557274I5 (enExample) 1976-03-23

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee