申请人:Sony Chemicals Corporation
公开号:EP1111972A2
公开(公告)日:2001-06-27
A flexible printed substrate is constituted of metallic foil and provided thereon a polyimide layer which is produced by forming a film of a polyamic acid varnish on the metallic foil, followed by imidating. The polyimide layer has a linear expansion coefficient of 10×10-6 to 30× 10-6 (1/K) and a softening point not more than the imidation temperature.
柔性印刷基板由金属箔构成,其上有一层聚酰亚胺层,聚酰亚胺层是通过在金属箔上形成一层聚胺基酸清漆薄膜,然后进行酰亚胺化而制成的。聚酰亚胺层的线膨胀系数为 10×10-6 至 30×10-6 (1/K),软化点不高于酰亚胺化温度。