Patent ID: 7070864
Filing Date: 2006-07-04
Classification: B32B,C08G,H05K,Y10T

Abstract:
1. A laminate comprising a conductor layer and an insulating resin layer that is formed of plural polyimide-based resin layers, wherein the insulating resin layer has at least two layers: (1) a polyimide-based resin layer (A) obtained by reacting a diamine compound containing 40 mol % or more of 4,4′-diamino-2,2′-dimethylbiphenyl with a tetracarboxylic acid compound; and (2) a polyimide-based resin layer (B) containing 80 mol % or more of a polyimide structural unit represented by the following general formula (1): wherein, in formula (1), R and groups represented by the following formulae (3) R 2 is at least one kind of group selected from group consisting of groups represented by the following formulae (4), and groups represented by the following formulae (5) wherein, in formula (4), X shows at least one kind selected from the group consisting of SO wherein the polyimide-based resin layer (B) is in contact with the conductor layer.