Patent ID: 7947795

Claim:
A polymer for filling gaps in a semiconductor substrate, comprising structural units of Formulae 1, 2, and 3 below: wherein Ra is hydrogen or a methyl group, R1 is substituted or unsubstituted C 6-10 aromatic, C 3-10 cycloalkyl or benzyl group, X is hydrogen, a vinyl group or an epoxy group, and m is a number from 0 to 10; wherein Rb is hydrogen or a methyl group; and wherein Rc is hydrogen or a methyl group, and n is a number from 1 to 10, wherein the polymer comprises about 5 mole % to about 70 mole % of the structural unit of Formula 2 and about 1 mole % to about 50 mole % of the structural unit of Formula 3.