Patent ID: 7241491

Claim:
A polyimide metal laminate prepared by applying polyimide resin onto a metal foil and/or laminating polyimide film and a metal foil, said polyimide metal laminate comprising at least one resin layer produced from a silica-dispersed polyimide composition wherein the maximum size of the dispersed silica particles is less than 100 nm and the content of silica (SiO 2 ) in the silica-dispersed polyimide composition in the polyimide metal laminate is 1 to 50 parts by weight relative to 100 parts by weight of the polyimide and wherein the at least one resin layer is obtained by reacting (A) alkoxysilane and/or its partial hydrolysis polycondensate with (B) an amino-containing compound having a functional group capable of forming a bond with silica, in the presence of water in a polyimide solution and/or a polyamic acid solution wherein the storage elastic modulus E′ at temperature of 250 to 500° C. of the polyimide metal laminate is 0.3 to 30 GPa.