Patent ID: 7691471

Claim:
A film comprising a polyimide composition derived from a diamine component and a dianhydride component wherein the diamine component comprises from 3 to 25 mole percent of a diamine represented by the following formula, where R is —CH 3 , —CH 2 —CH 3 , —CH 2 —CH 2 —CH 3 , —(CH 2 ) 3 —CH 3 , —(CH 2 ) 4 —CH 3 , CX 3 , —CH 2 —CX 3 , —CH 2 —CH 2 —CX 3 , —(CH 2 ) 3 —CX 3 , —(CH 2 ) 4 —CX 3 where X is equal to F, Cl, or Br, —C 6 H 5 and ortho or para C 6 H 5 —CH 3 wherein k is either 1 or 2, wherein the diamine component comprises from between 75 and 97 mole percent of a diamine represented by the following formula, NH 2 —X 1 —NH 2 wherein X 1 stands for a divalent aliphatic group, a divalent aromatic group, or a divalent siloxane containing aliphatic or aromatic group, and wherein the dianhydride component is selected from the group consisting of a dianhydride, a diacid-diester, a diacid halide ester, or a tetra-carboxylic acid, said film having a thickness between 1 and 300 microns.