GB2079054B - Electret device - Google Patents

Electret device

Info

Publication number
GB2079054B
GB2079054B GB8119537A GB8119537A GB2079054B GB 2079054 B GB2079054 B GB 2079054B GB 8119537 A GB8119537 A GB 8119537A GB 8119537 A GB8119537 A GB 8119537A GB 2079054 B GB2079054 B GB 2079054B
Authority
GB
United Kingdom
Prior art keywords
electret device
electret
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
GB8119537A
Other versions
GB2079054A (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.)
Toshiba Corp
Original Assignee
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
Priority claimed from JP8882180A external-priority patent/JPS5714297A/en
Priority claimed from JP8878180A external-priority patent/JPS5714287A/en
Application filed by Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Publication of GB2079054A publication Critical patent/GB2079054A/en
Application granted granted Critical
Publication of GB2079054B publication Critical patent/GB2079054B/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
GB8119537A 1980-06-30 1981-06-24 Electret device Expired GB2079054B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8882180A JPS5714297A (en) 1980-06-30 1980-06-30 Electret device
JP8878180A JPS5714287A (en) 1980-06-30 1980-06-30 Electret device

Publications (2)

Publication Number Publication Date
GB2079054A GB2079054A (en) 1982-01-13
GB2079054B true GB2079054B (en) 1984-02-22

Family

ID=26430121

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8119537A Expired GB2079054B (en) 1980-06-30 1981-06-24 Electret device

Country Status (2)

Country Link
DE (1) DE3125777A1 (en)
GB (1) GB2079054B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4443711A (en) * 1980-06-30 1984-04-17 Tokyo Shibaura Denki Kabushiki Kaisha Electret device
JPS57188105A (en) * 1981-05-14 1982-11-19 Toshiba Corp Electret constituent
FI115339B (en) * 2001-06-29 2005-04-15 Filtronic Lk Oy Arrangement for integrating the antenna end of the radiotelephone

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT282017B (en) * 1965-10-23 1970-06-10 Philip Morris Inc Dielectric body
JPS4815868B1 (en) * 1969-08-28 1973-05-17
JPS4948119B1 (en) * 1969-12-19 1974-12-19
JPS5221364B2 (en) * 1971-11-04 1977-06-10
JPS5718641B2 (en) * 1973-07-17 1982-04-17
CA1025994A (en) * 1975-07-08 1978-02-07 Uniroyal Ltd. Electromechanical transducer
DE2605809C2 (en) * 1976-02-12 1986-11-13 Minnesota Mining And Manufacturing Co., Saint Paul, Minn. Sensor device for detecting a change in temperature or a change in bending stress
FR2386898A2 (en) * 1977-04-05 1978-11-03 Anvar IMPROVEMENTS TO RELAY TYPE CONTROL DEVICES

Also Published As

Publication number Publication date
GB2079054A (en) 1982-01-13
DE3125777A1 (en) 1982-05-27

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee