Patent ID: 8685615
Filing Date: 2014-04-01
Classification: G03F

Abstract:
1. A resist underlayer film forming composition used in a lithography process comprising: a polymer (A) containing a unit structure having a hydroxy group, a unit structure having a carboxy group, or combination thereof; a crosslinkable compound (B) having at least two vinyl ether groups; a photoacid generator (C); a C a solvent (E), wherein: the polymer (A) includes a unit structure selected from unit structures of Formula (1), Formula (2), and Formula (3): (where R 0≦a≦1.0, 0≦b≦1.0, 0≦c≦0.5, and 0.5≦a+b≦1.0, and has a weight average molecular weight of 3,000 to 100,000; and the C (where R