Patent ID: 7527909

Claim:
An evaluation method of suitability of a resist composition as a positive resist composition used in a resist pattern formation method that comprises an immersion exposure step, wherein if a sensitivity when a 1:1 line and space resist pattern of 130 nm is formed by a normal exposure lithography process using a light source with a wavelength of 193 nm is termed X1, and a sensitivity when an identical 1:1 line and space resist pattern of 130 nm is formed by a simulated immersion lithography process in which a step for bringing a solvent for said immersion lithography in contact with said resist film is inserted between a selective exposure step and a post exposure baking step of a normal exposure lithography process using a light source with a wavelength of 193 nm is termed X2, and if an absolute value of [(X2/X1)−1]×100 is no more than 8.0, then the resist composition is decided to be suitable.