Patent ID: 8288471

Claim:
A white polyimide film comprising: a polyimide base polymer obtained by reacting diamine with dianhydride components, a coloration filler homogeneously distributed in the white polyimide film, and a pigment exhibiting complementary color to the color of the polyimide base polymer, the polyimide base polymer consisting of structures represented by the following formulae (I) and (II): wherein the ratio of m: n is about 0.95-0.05: 0.05-0.95; and the polyimide film having a total transparency value less than about 40%, a color defined with a b*-value representing a position of the color between yellow and blue that is between about 0 and about 15, and a variation Î”b* of the b*-value between about 0 and about 5 in a temperature range between about 250Â° C. and about 320Â° C.