Electret element and vibration power generating device using the same

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United States of America Patent

PATENT NO 9455647
APP PUB NO 20140145554A1
SERIAL NO

14074096

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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In an electret element 100 including a substrate 101, an electrically-conductive electrode 103, and an electret layer 107 including a first dielectric layer 104 and a second dielectric layer 105, when electrical charge charged in the electret layer 107 is negative, a bottom Ec of conductive band of the second dielectric layer 105 is lower than a bottom Ec of the first dielectric layer 104, and when the electrical charge is positive, a top Ev of valence band of the second dielectric layer 105 is higher than a top Ev of the first dielectric layer 104; and a concave portion 106 is formed in a surface of the first dielectric layer 104; and the second dielectric layer 105 is formed to cover the entire of the bottom face 106a and at least a part of the side wall 106b of the concave portion.

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Patent Owner(s)

  • IMEC;PANASONIC CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Leonov, Vladimir Leuven, BE 28 315
Takeuchi, Hiroki Osaka, JP 100 400

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