发明名称 |
Electret device |
摘要 |
An electret device having improved uniformity and lifetime of surface charge distribution, wherein a polarized dielectric body is secured at its one flat surface to a conductive electrode and attached to a plurality of discrete cover bodies at its other flat surface opposite to the conductive electrode. The plurality of cover bodies may be comprised of any conductive, semi-conductive or non-conductive material.
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申请公布号 |
US4458161(A) |
申请公布日期 |
1984.07.03 |
申请号 |
US19820377798 |
申请日期 |
1982.05.13 |
申请人 |
TOKYO SHIBAURA DENKI KABUSHIKI KAISHA |
发明人 |
WADA, HIROTO;FUJIWARA, SHIGERU |
分类号 |
H04R19/00;H01G7/02;(IPC1-7):G11C13/02 |
主分类号 |
H04R19/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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