Patent ID: 8951712
Filing Date: 2015-02-10
Classification: G03F,Y10S

Abstract:
1. A resist protective film-forming composition which is used in a lithography pattern forming process comprising the steps of forming a photoresist layer on a wafer, forming a protective film thereon, exposure, and development, said resist protective film-forming composition comprising a copolymer comprising recurring units (p) derived from at least one monomer selected from the group consisting of a styrene, indene, benzofuran and benzothiophene having 1,1,1,3,3,3-hexafluoro-2-propanol, and recurring units (q1), (q2), (q3) or (q4) derived from at least one monomer selected from the group consisting of a styrene, vinylnaphthalene, indene, benzofuran, benzothiophene, stilbene, styrylnaphthalene, and dinaphthylethylene, as represented by the general formula (1), as a base resin, wherein R 1 is hydrogen, hydroxyl, a straight, branched or cyclic C 1 -C 10 alkyl, alkoxy, acyloxy, cyano, nitro, amino group or halogen atom, m is 1 or 2, R R X X n is an integer of 1 to 5, 0.1≦p<1.0, 0≦q1≦0.9, 0≦q2≦0.9, 0≦q3≦0.9, 0≦q4≦0.9, and 0<q1+q2+q3+q4≦0.9.