JPS5714296A - Electret structure - Google Patents

Electret structure

Info

Publication number
JPS5714296A
JPS5714296A JP8882080A JP8882080A JPS5714296A JP S5714296 A JPS5714296 A JP S5714296A JP 8882080 A JP8882080 A JP 8882080A JP 8882080 A JP8882080 A JP 8882080A JP S5714296 A JPS5714296 A JP S5714296A
Authority
JP
Japan
Prior art keywords
electret
dielectric substance
electret member
potential
density
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
JP8882080A
Other languages
Japanese (ja)
Inventor
Masamichi Tanaka
Hiroto Wada
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP8882080A priority Critical patent/JPS5714296A/en
Priority to GB8119539A priority patent/GB2079056B/en
Priority to DE19813125784 priority patent/DE3125784A1/en
Publication of JPS5714296A publication Critical patent/JPS5714296A/en
Priority to US06/499,873 priority patent/US4441038A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
    • G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
    • G11C11/22—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using ferroelectric elements

Abstract

PURPOSE:To uniform the distribution of charges produced and to enable to adjust the density, by laminating a dielectric substance having greater size at the electret member of an electret element. CONSTITUTION:At an electret member side of an electret element 23 formed with an electret member 22 made of macropolymer film such as PP, TFE, FEP coated on a back electrode 21 made of a grounded conductive metallic base, a dielectric substance 24 made of a conductive metallic material or an organic substance having larger size is laminated. Although the nonelectret part is present in the electret member 22, charges are produced with uniform distribution on the entire dielectric substance and the density is decreased and thus, the potential is also reduced. Thus, products rich in the moisture-proof, stable in the characteristics and in which the potential can be adjusted arbitrarily, can be manufactured.
JP8882080A 1980-06-30 1980-06-30 Electret structure Pending JPS5714296A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP8882080A JPS5714296A (en) 1980-06-30 1980-06-30 Electret structure
GB8119539A GB2079056B (en) 1980-06-30 1981-06-24 Electret device
DE19813125784 DE3125784A1 (en) 1980-06-30 1981-06-30 Electret device
US06/499,873 US4441038A (en) 1980-06-30 1983-06-01 Electret device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8882080A JPS5714296A (en) 1980-06-30 1980-06-30 Electret structure

Publications (1)

Publication Number Publication Date
JPS5714296A true JPS5714296A (en) 1982-01-25

Family

ID=13953552

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8882080A Pending JPS5714296A (en) 1980-06-30 1980-06-30 Electret structure

Country Status (1)

Country Link
JP (1) JPS5714296A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0626704A1 (en) * 1993-05-26 1994-11-30 Jacques Lewiner Apparatus for manufacturing of electrets
WO2005050680A1 (en) * 2003-11-20 2005-06-02 Matsushita Electric Industrial Co., Ltd. Electret and electret capacitor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0626704A1 (en) * 1993-05-26 1994-11-30 Jacques Lewiner Apparatus for manufacturing of electrets
FR2705827A1 (en) * 1993-05-26 1994-12-02 Lewiner Jacques Improvements to the devices for manufacturing the electrets and to the electrets obtained.
US5565717A (en) * 1993-05-26 1996-10-15 Lewiner; Jacques Devices for manufacturing electrets, and electrets obtained thereby
WO2005050680A1 (en) * 2003-11-20 2005-06-02 Matsushita Electric Industrial Co., Ltd. Electret and electret capacitor
US7620192B2 (en) 2003-11-20 2009-11-17 Panasonic Corporation Electret covered with an insulated film and an electret condenser having the electret

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