Patent ID: 7534727
Filing Date: 2009-05-19
Classification: G03F,H01L

Abstract:
1. A method of manufacturing a semiconductor device comprising a step of forming a predetermined pattern containing a plurality of gate patterns, in a process target film formed on or over a semiconductor substrate, said step of forming said predetermined pattern including: a step of classifying said predetermined pattern into fine gate patterns and the other patterns; a step of forming a first resist film having a first pattern, by forming a hard mask film and a resist film in this order on said process target film, and by subjecting the resist film to light exposure through a first photomask having said first pattern for forming said fine gate patterns, followed by development; a step of forming said first pattern into said hard mask film, by selectively dry-etching said hard mask film through said first resist film used as a mask; a step of forming a second resist film having a second pattern, by forming a resist film on said process target film and said hard mask film, and by subjecting the resist film to light exposure through a second photomask having said second pattern for forming said other patterns, followed by development; and a step of selectively dry-etching said process target film through said second resist film and said hard mask film used as masks.