| 摘要 |
PROBLEM TO BE SOLVED: To provide an electret element capable of forming a region having high charge density on an electret film. SOLUTION: The electret element 10 has: the electret film 2 capable of storing charge; and a charge outflow suppression film 3 that is formed on the upper surface of a region 21 having the high charge density of the electret film 2 and suppresses the outflow of the charge stored in the electret film 2. COPYRIGHT: (C)2008,JPO&INPIT
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