Patent ID: 8512939

Claim:
A method comprising: providing a substrate; forming a first material layer over the substrate; forming a patterned second material layer over the substrate; and removing the patterned second material layer with a fluid comprising a steric hindered organic base and organic solvent, wherein the fluid has a water content of less than 5%, wherein the steric hindered organic base is represented by the formula: wherein R 1 —Z 1 , R 2 —Z 2 , R 3 —Z 3 , and R 4 —Z 4 are steric hindered functional groups, and further wherein R 1 , R 2 , R 3 , and R 4 are each an alkyl group and Z 1 , Z 2 , Z 3 , and Z 4 are each a pendant group selected from the group consisting of —Cl, —Br, —I, —NO 2 , —SO 3 —, —H—, —CN, —NCO, —OCN, —CO 2 —, —OC(O)CR*, —SR*, —SO 2 N(R*) 2 , —SO 2 R*, —OC(O)R*, —C(O)R*, —Si(R*) 3 , and an epoxyl group.