Patent ID: 9267057
Filing Date: 2016-02-23
CPC Classification: C08G,C08J,C08K,C08L,C09D,Y10T

Claim Text:
1. A polyimide film comprising: a first polyimide layer including a polyimide base polymer and a polyimide powder distributed in the polyimide base polymer, the polyimide powder being derived from diamine monomers and dianhydride monomers with a diamine-to-dianhydride molar ratio of about 1:0.950 to about 1:0.995, and the polyimide powder being present in the first polyimide layer at a weight ratio between about 20 wt % and about 50 wt % of the total weight of the first polyimide layer; and a second polyimide layer stacked on a surface of the first polyimide layer.