Title:
ELECTRET, MANUFACTURING METHOD THEREOF, AND ACOUSTIC-SENSITIVE DEVICE HAVING CAPACITOR EQUIPPED WITH ELECTRET
Document Type and Number:
Japanese Patent JP2008021786
Kind Code:
A
Abstract:
To provide an electret having high electric charge storing performance, and to provide a manufacturing method thereof.
In the electret 12 consisting of an insulator film bearing electric charges, the electric charges are distributed so that an electric charge density can change in the insulator film.
Inventors:
OKINO TORU
MORI MITSUYOSHI
MORI MITSUYOSHI
Application Number:
JP2006191595A
Publication Date:
January 31, 2008
Filing Date:
July 12, 2006
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H01G7/02; H04R19/01; H04R19/04
Attorney, Agent or Firm:
Hiroshi Maeda
Hiroshi Takeuchi
Takahisa Shimada
Yuji Takeuchi
Katsumi Imae
Atsushi Fujita
Kazunari Ninomiya
Tomoo Harada
Iseki Katsumori
Seki Kei
Yasuya Sugiura
Hiroshi Takeuchi
Takahisa Shimada
Yuji Takeuchi
Katsumi Imae
Atsushi Fujita
Kazunari Ninomiya
Tomoo Harada
Iseki Katsumori
Seki Kei
Yasuya Sugiura