| 摘要 |
PROBLEM TO BE SOLVED: To provide an electret having high surface charge density, and to provide an electret capacitor microphone that has the electret. SOLUTION: The electret contains a fluorine aromatic resin consisting mainly of a fluorine aromatic polymer. The electret capacitor microphone has the electret. It is preferable that the fluorine aromatic polymer contain a fluorine aromatic polymer, having a molecular structure in which a fluorine atom directly bonds to an aromatic ring. It is preferable that the fluorine aromatic polymer be a fluorine containing polyarylene and/or a fluorine containing polyarylene ether. COPYRIGHT: (C)2009,JPO&INPIT |
