Title:
ELECTRET AND ELECTRET CAPACITOR
Document Type and Number:
WIPO Patent Application WO/2005/050680
Kind Code:
A1
Abstract:
A silicon nitride film (103) and another silicon nitride film (106) are so formed as to cover a charged silicon oxide film (105) which is to be an electret.
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Inventors:
YAMAOKA TOHRU
OGURA HIROSHI
MIYOSHI YUICHI
SASAKI TOMOYUKI
OGURA HIROSHI
MIYOSHI YUICHI
SASAKI TOMOYUKI
Application Number:
PCT/JP2004/016835
Publication Date:
June 02, 2005
Filing Date:
November 12, 2004
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
YAMAOKA TOHRU
OGURA HIROSHI
MIYOSHI YUICHI
SASAKI TOMOYUKI
YAMAOKA TOHRU
OGURA HIROSHI
MIYOSHI YUICHI
SASAKI TOMOYUKI
International Classes:
H01G5/013; H01G5/16; H01G7/02; H04R19/01; (IPC1-7): H01G7/02; H04R19/01
Foreign References:
| JP2002033241A | 2002-01-31 | |||
| JPS5714296A | 1982-01-25 | |||
| JP2002198370A | 2002-07-12 | |||
| JP2003047095A | 2003-02-14 | |||
| JP2001231099A | 2001-08-24 | |||
| JP2002345088A | 2002-11-29 |
Other References:
See also references of EP 1686599A4
Attorney, Agent or Firm:
Maeda, Hiroshi (5-7 Hommachi 2-chome, Chuo-ku, Osaka-sh, Osaka 53, JP)
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