CA1226971A - Method for producing electret-containing devices - Google Patents

Method for producing electret-containing devices

Info

Publication number
CA1226971A
CA1226971A CA000476863A CA476863A CA1226971A CA 1226971 A CA1226971 A CA 1226971A CA 000476863 A CA000476863 A CA 000476863A CA 476863 A CA476863 A CA 476863A CA 1226971 A CA1226971 A CA 1226971A
Authority
CA
Canada
Prior art keywords
voltage
polarization
current
breakdown
response
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
CA000476863A
Other languages
English (en)
French (fr)
Inventor
Harvey D. Keith
Heinz Von Seggern
James E. West
Tsuey T. Wang
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.)
AT&T Inc
Original Assignee
American Telephone and Telegraph Co Inc
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 American Telephone and Telegraph Co Inc filed Critical American Telephone and Telegraph Co Inc
Application granted granted Critical
Publication of CA1226971A publication Critical patent/CA1226971A/en
Expired legal-status Critical Current

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
    • H01G7/021—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
    • Y10T29/42—Piezoelectric device making
    • 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
    • Y10T29/49226—Electret making

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
CA000476863A 1984-03-26 1985-03-19 Method for producing electret-containing devices Expired CA1226971A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US593,619 1984-03-26
US06/593,619 US4612145A (en) 1984-03-26 1984-03-26 Method for producing electret-containing devices

Publications (1)

Publication Number Publication Date
CA1226971A true CA1226971A (en) 1987-09-15

Family

ID=24375442

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000476863A Expired CA1226971A (en) 1984-03-26 1985-03-19 Method for producing electret-containing devices

Country Status (6)

Country Link
US (1) US4612145A (OSRAM)
EP (2) EP0174369A1 (OSRAM)
JP (1) JPS61501541A (OSRAM)
CA (1) CA1226971A (OSRAM)
DE (1) DE3572886D1 (OSRAM)
WO (1) WO1985004513A1 (OSRAM)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2105380A1 (en) * 1991-04-08 1992-10-09 Gary A. Antilla User features for next generation cordless telephone networks
FR2700220B1 (fr) * 1993-01-06 1995-02-17 Saint Louis Inst Procédé pour polariser au moins une zone d'une feuille de matériau ferroélectrique, et procédé pour réaliser un élément polarisé pour capteur piézoélectrique ou pyroélectrique.
US5835027A (en) * 1996-11-07 1998-11-10 Tyburski; Robert M. Residual charge effect traffic sensor
JP3137936B2 (ja) * 1997-11-26 2001-02-26 日本碍子株式会社 圧電／電歪膜型チップの分極処理方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3588638A (en) * 1969-05-27 1971-06-28 Energy Conversion Devices Inc Current controlling device including v02
JPS5718641B2 (OSRAM) * 1973-07-17 1982-04-17
US4243460A (en) * 1978-08-15 1981-01-06 Lundy Electronics & Systems, Inc. Conductive laminate and method of producing the same
US4248808A (en) * 1978-12-29 1981-02-03 Bell Telephone Laboratories, Incorporated Technique for removing surface and volume charges from thin high polymer films
FR2446045A1 (fr) * 1979-01-04 1980-08-01 Thomson Csf Transducteur piezo-electrique a element en polymere et son procede de fabrication
IL59078A0 (en) * 1979-01-30 1980-05-30 Int Standard Electric Corp Manufacture of piezo-electric plastics film and transducer comprising it
GB2040642A (en) * 1979-01-30 1980-08-28 Standard Telephones Cables Ltd Transducer
US4260566A (en) * 1979-10-24 1981-04-07 Aluminum Company Of America Strand shield defect detector
US4379098A (en) * 1980-07-17 1983-04-05 Transmet Corporation Electromagnetic radiation shielding composites and method of production thereof

Also Published As

Publication number Publication date
JPS61501541A (ja) 1986-07-24
DE3572886D1 (en) 1989-10-12
WO1985004513A1 (en) 1985-10-10
EP0174369A1 (en) 1986-03-19
EP0159147A1 (en) 1985-10-23
US4612145A (en) 1986-09-16
JPH0575164B2 (OSRAM) 1993-10-20
EP0159147B1 (en) 1989-09-06

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Legal Events

Date Code Title Description
MKEX Expiry