Patent ID: 7311966
Filing Date: 2007-12-25
Classification: B29C,B29K,B29L,B32B,C08G,C08J,H01M,H05K,Y02E,Y10S,Y10T

Abstract:
1. A laminate, comprising: a conductive metal layer for an electronic circuit; and a porous insulating film, wherein the conductive metal layer is laminated on one or both sides of the porous insulating film either directly or via a heat resistant adhesive layer, and wherein the porous insulating film consists essentially of a highly heat resistant polyimide resin film having a fine porous structure wherein a) fine continuous channels reach to both surfaces of the porous insulating film in a nonlinear fashion and have a mean pore size of 0.01 to 0.2 μm in the center of the film and 0.4 to 0.9 μm at both surfaces of the film and a void volume of 15 to 80%; b) the polyimide resin film consists essentially of a polyimide obtained from the combination of at least one tetracarboxylic acid component and a diamine component; and c) the porous insulating film has