Patent ID: 8999622
Filing Date: 2015-04-07
Classification: G03F,Y10S

Abstract:
1. A pattern forming method, comprising: (i) forming a film from a chemical amplification resist composition that contains (A) a resin capable of increasing a polarity of the resin (A) to decrease a solubility of the resin (A) for a developer containing an organic solvent by an action of an acid, (B) a compound capable of generating an acid upon irradiation with an actinic ray or radiation, and (C) a solvent; (ii) exposing the film with an ArF excimer laser; and (iii) performing development by using a developer containing an organic solvent, wherein the content of the resin (A) is from 30 to 99 mass % based on the entire solids content of the resist composition, the resin (A) has a structure in which a polar group is protected with a leaving group capable of decomposing and leaving by an action of an acid, and the leaving group contains a fluorine atom; wherein the structure in which a polar group is protected with a leaving group capable of decomposing and leaving by an action of an acid is a group represented by the following formula (a-1): wherein in formula (a-1), each of Rx Rx * represents a bond to the main chain or side chain of the resin (A); and wherein the number of atoms intervening between C