Patent ID: 9091914
Filing Date: 2015-07-28
Classification: G03F

Abstract:
1. A pattern forming process comprising the steps of coating a non-chemically amplified negative resist composition onto a substrate to form a resist film, baking, exposing to high-energy radiation, and developing with a developer, whereby the resist film in the exposed area is not dissolved in the developer whereas the resist film in the unexposed area is dissolved to form a negative pattern, wherein said non-chemically amplified negative resist composition consists essentially of a metal complex of a β-diketone, the metal being selected from the group consisting of magnesium, chromium, manganese, iron, cobalt, nickel, copper, zinc, silver, cadmium, indium, tin, antimony, cesium, zirconium, and hafnium, at least one solvent selected from the group consisting of water, methanol, ethanol, n -propanol, isopropyl alcohol, 1-butyl alcohol, 2-butyl alcohol, isobutyl alcohol, tert-butyl alcohol, 1-pentanol, 2-pentanol, 3-pentanol, tert-amyl alcohol, neopentyl alcohol, 2-methyl-1-butanol, 3-methyl-1 -butanol, 3-methyl-2-butanol, 3 -methyl-3 -pentanol, cyclop entanol, 1 -hexanol, 2-hexanol, 3 -hexanol, 2,3-dimethyl-2-butanol, 3,3 -dimethyl-1 -butanol, 3,3 -dimethyl-2-butanol, 2-ethyl-1-butanol, 2-methyl-l-pentanol, 2-methyl-2-pentanol, 2-methyl-3-pentanol, 3-methyl-l-pentanol, 3-methyl-2-pentanol, 3-methyl-3-pentanol, 4-methyl-1-pentanol, 4-methyl-2-pentanol, 4-methyl-3-pentanol, 1-heptanol, cyclohexanol, octanol, methyl lactate, ethyl lactate, propyl lactate, butyl lactate, propylene glycol, butanediol monomethyl ether, propylene glycol monomethyl ether, butanediol monoethyl ether, propylene glycol monoethyl ether, butanediol monopropyl ether, propylene glycol monopropyl ether, propylene glycol monomethoxymethyl ether, propylene glycol monoacetate, diacetone alcohol, allyl alcohol, propargyl alcohol, 3-methyl-1-pentyn-3-ol, 3-methyl -1-butyn-3-ol, furfuryl alcohol, tetrahydrofurfuryl alcohol, and glycidol, and a resin having a weight-average molecular weight of 200 to 20,000 by GPC versus polystyrene standard and selected from the group consisting of phenolic resins, silicon oxide base resins, zirconium oxide base resins, zinc oxide base resins, titanium oxide base resins, hafnium oxide base resins, silsesquioxane-titanium oxide resins, silsesquioxane-zirconium oxide resins, and silsesquioxane-hafnium oxide resins, wherein the metal complex of a β-diketone is contained in an amount of at least 30 parts by weight per 100 parts by weight of the resin.