Patent ID: 6083665
Filing Date: 2000-07-04
Classification: G03F,Y10S

Abstract:
A method for the formation of a patterned resist layer on the surface of a substrate which comprises the steps of:(A) exposing, pattern-wise to actinic rays through a phase shift photomask, the photoresist layer of a photoresist laminate comprising(a) a substrate;(b) an anti-reflection coating layer comprising, as a uniform mixture, an ultraviolet absorbing compound and either one or both of a crosslinking agent and a binder resin, said anti-reflection coating layer being formed on one surface of the substrate; and(c) a photoresist layer formed on the anti-reflection coating layer from a negative-working chemical-sensitization photoresist composition comprising, as a uniform mixture:(1) a film-forming resinous ingredient which is an alkali-soluble resin having phenolic hydroxyl groups or a resin having phenolic hydroxyl groups insolubilized in an alkali by substitution for a part of the hydroxyl groups by solubility-reducing substituent groups having no reactivity with an acid;(2) an oximesulfonate compound as an acid-generating agent; and(3) a crosslinkable compound;(B) subjecting the photoresist layer to a heat treatment;(C) subjecting the photoresist layer to a development treatment to dissolve away the photoresist layer in the areas unexposed to actinic rays in step (A) to pattern-wise expose the anti-reflection coating layer in the areas unexposed to the actinic rays leaving a patterned resist layer in the areas exposed to actinic rays; and(D) removing the anti-reflection coating layer exposed pattern-wise by dry etching with the patterned photoresist layer as an etching mask.