Patent ID: 6787290
Filing Date: 2004-09-07
Classification: G03F,Y10S

Abstract:
A positive-working photoresist composition which comprises, as a uniform solution in an organic solvent:(A) 100 parts by weight of a hydroxystyrene-based polymer which is a combination of: (A1) a first polyhydroxystyrene resin having phenolic hydroxyl groups a part of which are substituted for the hydrogen atoms thereof by acid-dissociable alkoxyalkyl groups; and (A2) a second polyhydroxystyrene resin having phenolic hydroxyl groups a part of which are substituted for the hydrogen atoms thereof by acid-dissociable groups selected from the group consisting of tertiary alkoxycarbonyl groups, tertiary alkyl groups and cyclic ether groups, and wherein the weight proportion of the first polyhydroxystyrene resin (A1) to the second polyhydroxystyrene resin (A2) is in range from 2:8 to 9:1; (B) from 1 to 20 parts by weight of a radiation-sensitive acid-generating compound; (C) from 0.1 to 25 parts by weight of a polyvinyl ether compound susceptible to crosslinking, represented by the formula X(â€”Oâ€”CH&boxH;CH2)n, in which the subscript n is a positive integer of 2, 3 or 4 and X is an n-valent organic residue derived from a molecule of alicyclic hydrocarbon compound by eliminating n hydrogen atoms; (D) from 0.01 to 5 parts by weight of a carboxylic acid consisting of atoms of carbon, oxygen and hydrogen alone; and (E) from 0.01 to 1 part by weight of an amine compound.