Patent ID: 8338072
Filing Date: 2012-12-25
Classification: G03F,H01L

Abstract:
1. A resist composition comprising: a base resin; a photoacid generator; a first additive; a second additive; and a third additive, wherein at least any one of the first additive and the second additive is one selected from the group consisting of: formic acid, acetic acid, lactic acid, butyric acid, valeric acid, vinyl acetic acid, propionic acid, succinic acid, benzoic acid, fumaric acid, and malonic acid, and wherein the pKa of the second additive is higher than the pKa of the first additive, and at a resist formation temperature, the vapor pressure of the second additive is lower than the vapor pressure of the first additive, and wherein the pKa of the third additive is higher than the pKa of the second additive and, at the resist formation temperature, the vapor pressure of the third additive is lower than the vapor pressure of the second additive.