发明申请
- 专利标题: MULTILAYER POLYIMIDE FILM, LAMINATE, AND METAL-CLAD LAMINATE
- 专利标题(中): 多层聚酰亚胺膜,层压板和金属层压板
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申请号: US12671719申请日: 2008-07-18
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公开(公告)号: US20110033682A1公开(公告)日: 2011-02-10
- 发明人: Masayoshi Shimizu , Hisayasu Kaneshiro , Shogo Fujimoto
- 申请人: Masayoshi Shimizu , Hisayasu Kaneshiro , Shogo Fujimoto
- 优先权: JP2007-203329 20070803
- 国际申请: PCT/JP2008/063018 WO 20080718
- 主分类号: B32B15/08
- IPC分类号: B32B15/08 ; B32B27/28
摘要:
An object of this invention is to provide a polyimide film suitable for use in flexible printed circuit boards and the like which have high flexibility and dimensional stability, and to provide a laminate and metal-clad laminate which uses such a polyimide film. This invention relates to a multilayer polyimide film being a polyimide film having a multilayer structure, including: a core layer; and clad layers provided on each side of the film, which clad layers are exposed, the core layer being a non-thermoplastic polyimide having an average coefficient of linear expansion at a temperature from 100° C. to 200° C. in a range of 5 ppm/° C. to 20 ppm/° C., each of the clad layers being a polyimide having a peeling strength of 3 N/cm or less, the film as a whole having an average coefficient of linear expansion at a temperature range of 100° C. to 200° C. in a range of 9 ppm/° C. to 30 ppm/° C., and (a)>(b), where (a) is an average modulus of elasticity of the core layer and (b) is an average modulus of elasticity of the clad layers.
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