Patent ID: 8178284

Claim:
A method of forming a pattern using a chemically amplified resist composition, said method comprising: forming an underlayer film on a support using an underlayer film-forming material, forming a hard mask on said underlayer film using a silicon-based hard mask-forming material, forming a first resist film by applying a chemically amplified positive resist composition to said hard mask, forming a first resist pattern by selectively exposing said first resist film through a first mask pattern and then performing developing, forming a first pattern by etching said hard mask using said first resist pattern as a mask, forming a second resist film by applying a chemically amplified positive silicon-based resist composition to said first pattern and said underlayer film, forming a second resist pattern by selectively exposing said second resist film through a second mask pattern and then performing developing, and forming a second pattern by etching said underlayer film using said first pattern which is formed by etching said hard mask using said first resist pattern as a mask and said second resist pattern as a mask.