Patent ID: 6605366
Filing Date: 2003-08-12
Classification: B32B,C08G,C08J,H05K,Y10T

Abstract:
A metal film/aromatic polyimide films/metal film laminate comprising a first metal film, an amorphous aromatic polyimide film of 0.05 to 3 &mgr;m thick which has a glass transition temperature in the range of 200 to 300Â° C., an aromatic polyimide substrate film, and a second metal film in order, the second metal film being a copper film having been subjected to surface roughing treatment, the substrate film having a thickness of 10 to 150 &mgr;m and a linear expansion coefficient of not higher than 30Ã—10âˆ’6 cm/cm/Â° C. in the temperature range of 50 to 200Â° C., and comprising a non-thermoplastic polyimide base layer and a pair of thermoplastic polyimide layers each of which is fixed onto each surface of the base layer.