| 发明名称 |
ELECTRET AND ELECTRET CAPACITOR |
| 摘要 |
A silicon nitride film (103) and another silicon nitride film (106) are so formed as to cover a charged silicon oxide film (105) which is to be an electret.
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| 申请公布号 |
KR20060115870(A) |
申请公布日期 |
2006.11.10 |
| 申请号 |
KR20067008847 |
申请日期 |
2004.11.12 |
| 申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
YAMAOKA TOHRU;OGURA HIROSHI;MIYOSHI YUICHI;SASAKI TOMOYUKI |
| 分类号 |
H04R7/02;H01G5/013;H01G5/16;H01G7/02;H04R19/01 |
主分类号 |
H04R7/02 |
| 代理机构 |
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代理人 |
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