Patent ID: 7172848
Filing Date: 2007-02-06
Classification: G03F,G11B,Y10S

Abstract:
1. A positive resist composition comprising a material (A) that exhibits absorption at 248 mm which gives said positive resist composition whose film thickness is 0.3 μm a light transmittance of wavelength 248 nm within a range from 20 to 75%, wherein said material is anthracenemethanol, anthraceneethanol, anthracenecarboxylic acid, anthracene, methylanthracene, dimethylanthracene or hydroxyanthracene, a resin component (B), which contains an acid dissociable, dissolution inhibiting group, and exhibits increased alkali solubility in presence of acid, an acid generator component (C) that generates acid on exposure, and an organic solvent (D) that is capable of dissolving said component (A), said component (B) and said component (C).