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发明名称
ELECTRET AND ELECTRET CAPACITOR
摘要
<p>A silicon nitride film (103) and a silicon nitride film (106) are formed to cover a charged silicon oxide film (105) serving as an electret.</p>
申请公布号
EP1686599(A1)
申请公布日期
2006.08.02
申请号
EP20040818870
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
H01G7/02;H01G5/013;H01G5/16;H04R19/01
主分类号
H01G7/02
代理机构
代理人
主权项
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