Patent ID: 6828390
Filing Date: 2004-12-07
Classification: B29B,C08J,C08L,H05K

Abstract:
A polyimide film comprising:(a) a first polyimide said first polyimide comprising the reaction product of components comprising a dianhydride component, a diamine component, and an end capping component, wherein said dianhydride component of said first polyimide has a tetravalent aromatic group selected from the group consisting of: wherein X is a divalent organic group selected from among â€”COâ€”, â€”Oâ€”, â€”Sâ€”, â€”SO2â€”, â€”CH2â€”, â€”C(CH3)2â€”, and â€”C(CF3)2â€”; wherein said diamine component of said first polyimide has a divalent aromatic group selected from the group consisting of: where in Y is a divalent organic group selected from the group consisting of â€”COâ€”, â€”Oâ€”, â€”Sâ€”, â€”SO2â€”, â€”CH2â€”, â€”C(CH3)2â€”, and â€”C(CF3)2â€”; wherein said end capping component of said first polyimide is selected from the group consisting of: a carboxylic anhydride and a silylating agent, (b) a second polyimide said second polyimide comprising the reaction product of components comprising a dianhydride component, a diamine component, and an end capping component, wherein said dianhydride component of said second polyimide has a tetravalent aromatic group selected from the group consisting of: wherein X is a divalent organic group selected from among â€”COâ€”, â€”Oâ€”, â€”Sâ€”, â€”SO2â€”, â€”CH2â€”, â€”C(CH3)2â€”, and â€”C(CF3)2â€”; wherein said diamine component of second polyimide has a divalent aromatic group selected from the group consisting of: wherein Y is a divalent organic group selected from the group consisting of â€”COâ€”, â€”Oâ€”, â€”Sâ€”, â€”SO2â€”, â€”CH2â€”, â€”C(CH3)2â€”, and â€”C(CF3)2â€”; wherein said end capping component of second polyimide is selected from the group consisting of: a carboxylic anhydride, and a silylating agent, wherein said first polyimide and said second polyimide are loosely, physically interlocked and bonded as an interpenetrating polyimide network, and wherein said first polyimide and said second polyimide are formed into a single film using a chemical conversion process.