Patent ID: 7635553
Filing Date: 2009-12-22
Classification: G03F,Y10S

Abstract:
1. A pattern forming method comprising: coating a resist composition having a solids content concentration of 1.0 to 10.0 mass % on a substrate; adjusting a rotational speed of the substrate within a range of 500 to 1,500 rpm so that a film thickness of the resist composition coated is adjusted to be 50 to 200 nm; and subjecting the resist composition to drying, exposure and development, wherein the resist composition comprises: (A) a compound capable of generating an acid upon irradiation with one of actinic rays and radiation; (B) a resin of which dissolution rate in an alkali developer increases under the action of an acid; (C) a mixed solvent; and (D) a surfactant, and the mixed solvent (C) comprises at least one member selected from a group A of solvents and at least one member selected from a group B of solvents, or comprises at least one member selected from the group A of solvents and at least one member selected from a group C of solvents: Group A: propylene glycol monoalkyl ether carboxylates, Group B: propylene glycol monoalkyl ethers, alkyl lactates, acetic acid esters, one of chain and cyclic ketones, and alkoxyalkyl propionates, and Group C: γ-butyrolactone, ethylene carbonate and propylene carbonate.