Patent ID: 8900468

Claim:
A method of forming a pattern, the method comprising: forming a hydrophilic guide layer on a substrate including an object layer formed thereon; forming a developable bottom anti-reflective coating (DBARC) layer and a photoresist film on the hydrophilic guide layer; exposing a portion of the photoresist film and the underlying DBARC layer to form an exposed portion and an unexposed portion in the photoresist film and the DBARC layer, respectively; forming a photoresist pattern including the exposed portion of the photoresist film by removing the photoresist film of the unexposed portion; forming a neutral layer on a surface of the photoresist pattern and the unexposed portion of the DBARC layer; removing the photoresist pattern, the neutral layer on a surface of the photoresist pattern, and the exposed portion of the DBARC layer to form a neutral layer pattern and first opening portions exposing a surface of the hydrophilic guide layer; forming a block copolymer layer on the neutral layer pattern and filling the first opening portions, the block copolymer layer including a block copolymer having a first polymer block and a second polymer block; forming a pattern layer including first patterns and second patterns by microphase separating the block copolymer layer, each of the first patterns and each of the second patterns being repeatedly disposed, the first patterns including the first polymer block in the first opening portions and on the neutral layer, the second patterns including the second polymer block surrounding sidewalls of the first patterns; forming a pattern mask by removing one of the first and second patterns including at least one of the first and second polymer blocks from the pattern layer; and forming a pattern by etching the object layer using the pattern mask, the pattern including second opening portions.