Patent ID: 8088554
Filing Date: 2012-01-03
Classification: G03F

Abstract:
1. A bottom resist layer composition for a multilayer-resist film used in lithography which comprises, at least, a polymer having a repeating unit represented by the following general formula (1), wherein R R R a and b satisfy 0<a<1, 0<b<1, and 0<a+b≦1, and Z represents any one of indene, benzothiophene, anthracene, acenaphthylene, pyrene, fluorene, phenanthrene, azulene, heptalene, biphenylene, indacene, fluoracene, naphthacene, aceanthrylene, and perylene, wherein the multilayer-resist film is a trilayer resist film comprising a bottom resist layer formed on a substrate, an intermediate resist layer containing silicon atoms formed on the bottom resist layer, and a top resist layer of a photoresist composition formed on the intermediate resist layer.