Patent ID: 6897012
Filing Date: 2005-05-24
Classification: G03F,Y10S

Abstract:
1. A method for the formation of a resist pattern on a substrate which comprises the steps of: (1) coating a substrate surface with an alkali-developable chemical-amplification negative-working photoresist composition which comprises, as a uniform solution in an organic solvent, (A) from 0.5 to 30 parts by weight of a compound capable of releasing an acid by irradiation with actinic rays and (B) 100 parts by weight of a resinous compound capable of being insolubilized in an aqueous alkaline solution in the presence of an acid, the resinous compound as the component (B) having, in the molecule, two kinds of functional groups capable of reacting each with the other to form an intermolecular or intramolecular ester linkage in the presence of an acid whereby the resinous compound is insolubilized in an aqueous alkaline solution; (2) drying or pre-baking the coating layer of the aqueous coating solution to form a dried photoresist layer; (3) patternwise exposing the dried photoresist layer to actinic rays through a photomask; (4) subjecting the photoresist layer to a post-exposure baking treatment to form a latent image of the pattern; and (5) developing the photoresist layer with an aqueous alkaline developer solution to form a patterned resist layer.