Electret device and electrostatic induction conversion...

Details Electret device and electrostatic induction conversion... Electret device and electrostatic induction conversion...

2011-06-07

2011-06-07

Fureman, Jared J (Department: 2836)

Electrical transmission or interconnection systems

Electrets

Reexamination Certificate

active

07956497

ABSTRACT:
An electret device includes an electret film into which charges are injected and a barrier film provided on a surface of the electret film and having an electron affinity smaller than the electron affinity of the electret film.

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Japanese Office Action for corresponding Patent Application No. JP 2007-227457, dated Aug. 18, 2009, pp. 1-5, Japan.
Japanese Office Action for corresponding JP Application No. 2007-227457, Apr. 14, 2009, Japan.

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