Patent ID: 7211332

Claim:
A laminate comprising a metal foil layer, and a polyimide resin layer provided on said metal foil layer, wherein said polyimide resin layer is obtained by curing a coating of a polyimide resin precursor solution directly applied onto a surface of said metal foil layer, wherein said polyimide resin layer has a linear expansion coefficient in the range from 10 to 30 ppm/K, at a temperature range of from 240 to 100° C. wherein said metal foil layer and said polyimide resin layer have a bonding strength therebetween of at least 0.5 kN/m in terms of 180° peel strength, and wherein said polyimide resin obtained from said polyimide resin precursor solution contains at least 50 % by weight of a moiety having a structure represented by the following formula (2): wherein x and y each represent a molar fraction and satisfy the following conditions: x+y=100, 60≦x≦90 and 10≦y≦40.