AT323297B - Verfahren zum herstellen eines folienelektrets hoher ladungsdichte - Google Patents

Verfahren zum herstellen eines folienelektrets hoher ladungsdichte

Info

Publication number
AT323297B
AT323297B AT937471A AT937471A AT323297B AT 323297 B AT323297 B AT 323297B AT 937471 A AT937471 A AT 937471A AT 937471 A AT937471 A AT 937471A AT 323297 B AT323297 B AT 323297B
Authority
AT
Austria
Prior art keywords
electrete
film
manufacturing
charge density
high charge
Prior art date
Application number
AT937471A
Other languages
English (en)
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
Application granted granted Critical
Publication of AT323297B publication Critical patent/AT323297B/de

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)
AT937471A 1970-11-02 1971-10-29 Verfahren zum herstellen eines folienelektrets hoher ladungsdichte AT323297B (de)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
AT323297B true AT323297B (de) 1975-07-10

Family

ID=22194584

Family Applications (1)

Application Number Title Priority Date Filing Date
AT937471A AT323297B (de) 1970-11-02 1971-10-29 Verfahren zum herstellen eines folienelektrets hoher ladungsdichte

Country Status (10)

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

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5220851B1 (de) * 1969-12-11 1977-06-07
FR2144933A5 (de) * 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
SE366608B (de) 1974-04-29
DE2153784A1 (de) 1972-05-25
BE774468A (fr) 1972-02-14
NL162778B (nl) 1980-01-15
IT940095B (it) 1973-02-10
NL162778C (nl) 1980-06-16
DE2153784B2 (de) 1974-10-24
US3705312A (en) 1972-12-05
NL7114561A (de) 1972-05-04
DE2153784C3 (de) 1975-07-17
JPS5541014B1 (de) 1980-10-21
FR2113400A5 (de) 1972-06-23
GB1363717A (en) 1974-08-14

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Legal Events

Date Code Title Description
ELJ Ceased due to non-payment of the annual fee