Patent ID: 7465527
Filing Date: 2008-12-16
Classification: G03F,Y10S

Abstract:
1. A resist material comprising: a) a first photo-acid generator exhibiting an absorption peak to exposure light having a wavelength of less than 300 nm, wherein the first photo-acid generator is an onium salt compound expressed by (R wherein R 2 represents a substituent group; b) a second photo-acid generator exhibiting an absorption peak to exposure light having a wavelength of 300 nm or more, wherein the second photo-acid generator is selected from the group consisting of the compounds expressed by formulae below, ; and c) a resin of a polarity changeable type, wherein 5-80% of all polar groups in the resin are substituted by a protective group, wherein the protective group is eliminated by an acid resulting from the first and second photo-acid generators, and wherein the protective group is a hydrophobic protective group which is an adamantyl or norbornane functional group expressed by the formula below, where “R wherein the resist material is a positive resist material.