Patent ID: 8980755
Filing Date: 2015-03-17
Classification: B81C,G03F,H01L

Abstract:
1. A method for pattern formation on a substrate, comprising: forming a first film on a substrate; forming a second film on the first film to form a pattern on the first film that has a plurality of projections and a plurality of depressions; forming a first copolymer layer on a surface of the plurality of depressions; forming a first polymer portion and a second polymer portion in the first copolymer layer, the first polymer portion and the second polymer portion being alternately formed along a first direction; forming a second copolymer layer on the first copolymer layer; and forming a third polymer portion and a fourth polymer portion in the second copolymer layer, wherein a pitch of the first polymer portion and the second polymer portion is about two times greater than a pitch of the third polymer portion and the fourth polymer portion.