Patent ID: 9676934
Date: 2017-06-13
CPC Classifications: B05D,C08L,G03F

Claim:
1. A method of reducing a pattern comprising: forming a first hole pattern having an ellipse shape in the cross-section on a substrate having a thin film thereon, forming a block copolymer layer such that a layer containing a block copolymer is formed on the substrate having the hole pattern formed on a surface thereof using a block polymer composition, so as to cover the bottom of concave portions of the hole pattern; separating a phase such that the layer containing the block copolymer is subjected to phase separation after forming the block copolymer layer; and selectively removing a phase of blocks other than the block P wherein the ellipse shape of the first hole pattern has a minor axis/major axis ratio of 1/3 to 1/2, and the minor axis being in the range of 60 to 70 nm and the major axis being in the range of 140 to 280 nm, and wherein the block polymer composition consists of: a polystyrene-poly(methyl methacrylate) block copolymer; and a poly(methyl methacrylate) homopolymer, wherein the amount of the poly(methyl methacrylate) homopolymer is 25 parts by weight, relative to 100 parts by weight of polystyrene-poly(methyl methacrylate) block copolymer.