发明名称 |
Flexible printed-circuit base board and process for producing the same |
摘要 |
<p>A flexible double-sided copper-clad printed-circuit base board comprises two copper foils and a resin layer formed directly therebetween, the resin layer being a composite material comprising a polyimide having recurring units of the formula: <CHEM> wherein some of the groups R<1> are bivalent aromatic hydrocarbon groups of the formula <CHEM> (in which Y is -O-, -CO-, -SO2- or -CH2-) and the others are bivalent aromatic groups of the formula <CHEM> and a polyimide-silicone of formula: <CHEM> in which R<2> is a monovalent aliphatic hydrocarbon group having at most 5 carbon atoms or a monovalent aromatic hydrocarbon group having at most 9 carbon atoms; R<3> is a tetravalent aromatic hydrocarbon group; R<4> is a bivalent aromatic hydrocarbon group; R<5> is a siloxane chain; R<6> is a bivalent aliphatic hydrocarbon having 3 to 5 carbon atoms or a bivalent aromatic hydrocarbon group having 6 to 9 carbon atoms; r is 2 or 3; the molar ratio of x : y is in the range of 97-60 : 3-40; and the molar ratio of m : n is in the range of 50-100 : 50-0.</p> |
申请公布号 |
EP0411772(B1) |
申请公布日期 |
1996.03.27 |
申请号 |
EP19900307481 |
申请日期 |
1990.07.09 |
申请人 |
CHISSO CORPORATION |
发明人 |
KONOTSUNE, SHIRO;YANO, HITOSHI;HIRAI, SOUICHIRO;KUKITA, KAZUTSUNE |
分类号 |
B32B15/088;C08G73/10;H01B3/30;H05K1/03;(IPC1-7):C08G73/10 |
主分类号 |
B32B15/088 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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