| 摘要 |
<p>A flexible metal foil-polyimide laminate is prepared by joining a polyimide film to a metal foil via an intervening adhesive layer. The adhesive is a mixture of polyamic acids: (A) the reaction product of 3,4,3',4'-biphenyltetracarboxylic anhydride with p-phenylenediamine, (B) the reaction product of 3,4,3',4'-biphenyltetracarboxylic anhydride with 4,4'-diaminodiphenyl ether, and (C) the reaction product of pyromellitic dianhydride with 4,4'-diaminodiphenyl ether, in a weight ratio (A+B)/C between 75/25 and 25/75. The method is simple and inexpensive, and yields a flexible metal foil-polyimide laminate that is improved in peel strength and curling resistance while maintaining the heat resistance of polyimide.</p> |
