Patent ID: 9411224
Filing Date: 2016-08-09
CPC Classification: G03F

Claim Text:
1. A method of forming a resist pattern, comprising: forming a resist film on a substrate using a resist composition comprising a base component that exhibits increased solubility in an alkali developing solution under action of an acid, a photo-base generator component that generates a base upon exposure and the acid, the acid being represented by any one of general formulae (e-1) to (e-3) shown below;  wherein w′ represents an integer of 1 to 5; R subjecting the resist film to an exposure process by irradiating the resist film with radiation using a photomask, so as to neutralize the base generated from the photo-base generator component upon the exposure and the acid at an exposed portion of the resist film; baking the resist film after subjecting the resist film to exposure, so as to increase the solubility of the base component in an alkali developing solution by the action of the acid at an unexposed portion of the resist film; and subjecting the resist film to alkali development, thereby forming a negative-tone resist pattern in which the unexposed portion of the resist film has been dissolved and removed by the alkali developing solution and the exposed portion of the resist film remains as a pattern.