Patent ID: 7629091

Claim:
A polyimide compound obtained by the reaction of an acid dianhydride with a diamine and represented by the following formula (1): wherein A 1 is an organic group containing an aromatic ring or an alicyclic group; A 2 is an organic group containing an aromatic ring; and m and n are each an integer, the diamine comprising a first diamine that is 2,2′-bistrifluoromethyl-4,4′,-diaminobiphenyl, and a second diamine that is 4,4′-diamino-3,3′-biphenyldiol; wherein the first diamine accounts for 45 mol % or more of the diamine, and the second diamine accounts for 20 mol % or more of the diamine; and wherein the imidization rate is adjusted to 70% to 100%.