发明名称 |
VERFAHREN ZUR HERSTELLUNG EINER ELEKTRETVORRICHTUNG |
摘要 |
A method of manufacturing an electret device which comprises the step of causing a pressure deformation jig whose surface is provided with numerous minute convex and concave regions to abut against the surface of a raw dielectric material for an electret and later be removed therefrom, thereby forming minute stretched and contracted region on the surface of said dielectric material. |
申请公布号 |
DE2939397(A1) |
申请公布日期 |
1980.12.04 |
申请号 |
DE19792939397 |
申请日期 |
1979.09.28 |
申请人 |
TOKYO SHIBAURA DENKI K.K. |
发明人 |
TAMURA,SAKAE;YOSHIDA,HIROMI;KOTOH,TAKEHIKO;KOBAYASHI,MASAMI |
分类号 |
H04R19/00;H01G7/02;H04R19/01;(IPC1-7):H01G7/02;H01L37/00 |
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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