发明申请
- 专利标题: Vibrating plate for electricity-sound transformer and method for producing the same, and electricity-sound transformer and equipment using the same
- 专利标题(中): 电声变压器振动板及其制造方法,电声变压器及其使用设备
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申请号: US10588971申请日: 2005-04-25
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公开(公告)号: US20070160258A1公开(公告)日: 2007-07-12
- 发明人: Kazuyoshi Mimura , Shinya Mizone , Masahide Sumiyama
- 申请人: Kazuyoshi Mimura , Shinya Mizone , Masahide Sumiyama
- 优先权: JP2004-133115 20040428
- 国际申请: PCT/JP05/08322 WO 20050425
- 主分类号: H04R7/02
- IPC分类号: H04R7/02 ; C08G73/10
摘要:
A diaphragm for an electro-acoustic converter is made of an aromatic polyimide film. A glass transition temperature of the film is 230° C.-300° C. The aromatic polyimide film is made from a carboxylic acid component containing dicarboxylic acid compound having two or more number of ether-linked benzene rings as the major component and a diamine component containing diaminophenyl ether as the major component.