Patent ID: 7282257

Claim:
An adhesive film, comprising: (A) a layer of a resin composition, comprising: (a) a polyamide-imide resin which is soluble in organic solvents; (b) a thermosetting resin; (c) a filler; and (d) a resin having a polybutadiene structure and/or a polysiloxane structure, wherein: said polyamide-imide resin (a) and said thermosetting resin (b) are present in a weight ratio of said polymide-imide resin (a) to said thermosetting resin (b) of from 100:1 to 5:3; said polymide-imide resin (a), said thermosetting resin (b), and said filler (c) are present in relative amounts such that weight ratio of the total amount of said polyamide-imide resin (a) and said thermosetting resin (b) to said filler (c) by weight is from 100:1 to 3:2; said resin having a polybutadiene structure and/or a polysiloxane structure (d) is present in an amount of 0.1 to 15 parts by weight based on 100 parts by weight of said polyamide-imide resin (a); and said polyamide-imide resin (a), said thermosetting resin (b), said filler (c), and said resin having a polybutadiene structure and/or a polysiloxane structure (d) are present in a total amount of not less than 90% by weight, based on the total weight of said resin composition, (B) a layer of a thermosetting resin composition which is solid at a temperature of 40° C. or lower and melts at a temperature of 140° C. or lower; and (C) a supporting film, and having a layer structure in the order of said supporting film (C), said layer of said resin composition (A), and said layer of said thermosetting resin composition (B).