| abstract |
A polyimide film-laminated body is composed of a metal layer and an aromatic polyimide layer formed by casting a polyamic acid solution composition, comprising 3,3′,4,4′-biphenyltetracarboxylic dianhydride as an essential tetracarboxylic dianhydride component and with introduction of a specific diamine component, onto a metal foil. The polyimide film-laminated body has an excellent gas permeation rate and moisture permeation rate, with heat resistance, a high elastic modulus and a low linear expansion coefficient, and with reduced foaming and delamination during the high-temperature steps for formation of the laminated body. |