Patent ID: 8968990
Filing Date: 2015-03-03
Classification: G03F

Abstract:
1. A method of forming a resist pattern, comprising: a step (1) in which a resist composition comprising a base component that exhibits increased solubility in an alkali developing solution under action of acid, a photobase generator component that generates base upon exposure and an acidic compound component are applied to a substrate to form a resist film; a step (2) in which the resist film is subjected to exposure without being subjected to prebaking; a step (3) in which baking is conducted after the step (2), such that, at an exposed portion of the resist film, the base generated from the photobase generator component upon the exposure and the acidic compound component are neutralized, and at an unexposed portion of the resist film, the solubility of the base component in an alkali developing solution is increased by the action of the acidic compound component; and a step (4) in which the resist film is subjected to an alkali development, thereby forming a negative-tone resist pattern in which the unexposed portion of the resist film has been dissolved and removed.