Patent ID: 7700260
Filing Date: 2010-04-20
Classification: G03F

Abstract:
1. A pattern forming method which uses a positive resist composition comprising: (A) a fluorine-free resin capable of increasing its solubility in an alkaline developer under action of an acid; (B) a compound capable of generating an acid upon irradiation with an actinic ray or radiation; (C) a fluorine-containing resin having (XI) a group capable of decomposing under action of an alkali developer and increasing solubility of the resin (C) in an alkaline developer, wherein the resin (C) is added in an amount of 0.1 to 5 mass % based on the total solids in the positive resist composition; and (D) a solvent, the method comprising: (i) a step of applying the positive resist composition to a substrate to form a resist coating; (ii) a step of exposing the resist coating to light via an immersion liquid; (iii) a step of removing the immersion liquid remaining on the resist coating; (iv) a step of heating the resist coating; and (v) a step of developing the resist coating.