Patent ID: 7931819
Filing Date: 2011-04-26
Classification: B82Y,H01L,Y10S

Abstract:
1. A method for pattern formation, comprising: coating a composition comprising a block copolymer, a silicon compound, and a solvent for dissolving these components onto an object to form a layer of the composition on the object; subjecting the layer of the composition to self-organization of the block copolymer to cause phase separation into a first phase, in which the silicon compound is localized, having higher etching resistance by heat treatment or/and oxygen plasma treatment, and a second phase comprising a polymer phase and having lower etching resistance by heat treatment or/and oxygen plasma treatment, and thereby forming a pattern layer with a fine pattern; and etching the object using as a mask the thus formed pattern layer, wherein said silicon compound has a structure represented by one of the general formulas (1) to (4):