Patent ID: 7608380

Claim:
In a composition for use in photolithographic processes wherein the composition comprises a polymer dissolved or dispersed in a solvent system, the improvement being that said composition comprises a thermal crosslinking agent and said polymer is a copolymer of a compound having the formula and a compound having the formula wherein: each R is individually selected from the group consisting of —OH, —NH 2 , hydrogen, aliphatics, and phenyls, at least one R on each ring of(I) being —NH 2 , and at least one R on each ring of (I) being —OH; and L is selected from the group consisting of —SO 2 — and —CR′ 2 —, where each R′ is individually selected from the group consisting of hydrogen, aliphatics, phenyls, and —CX 3 , where each X is individually selected from the group consisting of the halogens, wherein said composition can be formed into a layer that will absorb at least about 90% of light having a wavelength of about 248 nm at a thickness of about 40 nm.