Patent ID: 7491447

Claim:
A double-sided metallic laminate comprising a metallic layer at one side, a resin layer of a low expansion polyimide having a thermal expansion coefficient of 5×10 −6 to 2.5×10 −5 /° C., a resin layer of a thermoplastic polyimide and a metallic layer at the other side, wherein the thermoplastic polyimide has a glass transition temperature of 200 to 250° C. and is a copolymer including the following formula 2a, formula 2b, formula 2c and formula 2d: in which, k≧1, l, m, n≧0,l=m=n≠0, k≧l, k+l>1.5(m+n) and k+m>1.5(l+n), X 2 is at least one selected from the consisting of Y 2 and Y 3 are each independently or simultaneously -, —O—, —CO—, —S—, —SO 2 —, —C(CH 3 ) 2 — or —CONH—, X 3 is and Y 4 is -, —O— or —CO—.