Patent ID: 7871761
Filing Date: 2011-01-18
Classification: G03F,Y10S

Abstract:
1. A method for forming a pattern on a substrate by lithography, the method comprising at least steps of: forming a resist lower layer on a treatment portion of the substrate using a material comprising: a crosslinkable polymer; and a thermal acid generator that can generate an acid by heating at 100° C. or greater and is represented by the following general formula (1a): wherein R R forming a resist upper layer on the resist lower layer using a photoresist composition so as to obtain a multilayer resist film comprising at least two layers; exposing a pattern circuit region of the multilayer resist film to light; after the exposure, developing the multilayer resist film with a developer to form a resist pattern on the resist upper layer; and etching the resist lower layer and the treatment portion of the substrate using the resist upper layer having the resist pattern formed thereon as a mask so as to form a pattern on the substrate.