Patent ID: 6559245
Filing Date: 2003-05-06
Classification: C08G,G03F,H05K,Y10S

Abstract:
A photoimageable, aqueous acid soluble polyimide polymer comprising:an anhydride including a substituted benzopbenone nucleus; said anydride being selected from the group consisting of benzophenone-tetracarboxylic dianhydride, anthraquinone-tetracarboxylic dianhydride, fluorenone-tetracarboxylic dianhydride, and thioxanthone-tetracarboxylic dianhydride, said anhydride further including up to about 25 Mole % of an anhydride selected from the group consisting of biphenyl-tetracarboxylic dianhydride, 3,3â€²diphenylsulfone-tetracarboxylic dianhydride, 4,4â€²oxydiphthalic anhydride, 2,2â€²-bis(3,4-dicarboxyphenyl)hexafluoropropane, and bis-dicarboxyphenyl sulfide, a diamine reacted with said anhydride to form a photosensitive polymer intermediate; and at least 60 Mole % of a solubilizing amine reacted with said photosensitive polymer intermediate to form said photoimageable, aqueous acid soluble polyimide polymer.