Patent ID: 9709890
Date: 2017-07-18
CPC Classifications: G03F,H01L

Claim:
1. A resist composition comprising a polymer comprising recurring units having a carboxyl group which may or may not be substituted with an acid labile group and/or a hydroxyl group which may or may not be substituted with an acid labile group excluding α-trifluoromethylhydroxy, a compound having a hydrophilic group and an oxirane or oxetane ring, the hydrophilic group being selected from hydroxyl, lactone ring, lactam ring, sultone ring, sulfone, sulfonic acid ester, sulfonamide, carboxylic acid amide, nitro, cyano, thienyl, furyl, pyrrole, and acid anhydride groups, and an acid generator, wherein the compound having a hydrophilic group and an oxirane or oxetane ring is selected from the group consisting of compounds having the following formulae: wherein R 3 is hydrogen, methyl, ethyl or propyl.