Patent ID: 9437452
Filing Date: 2016-09-06
CPC Classification: G03F,H01L

Claim Text:
1. A method of forming a fine pattern, the method comprising: forming a phase separation guide layer on a substrate; forming a neutral layer on the phase separation guide layer; forming a first pattern on the neutral layer, the first pattern including a plurality of first openings; forming a second pattern including a plurality of second openings by changing the first pattern, each of the plurality of second openings having a smaller width than each of the plurality of first openings; forming a neutral pattern by etching an exposed portion of the neutral layer using the second pattern as an etch mask, the neutral pattern including a plurality of guide patterns exposing a portion of the phase separation guide layer; removing the second pattern to expose a top surface of the neutral pattern; forming a material layer on the neutral pattern and the phase separation guide layer exposed through the plurality of guide patterns, the material layer including a block copolymer; and forming a fine pattern layer on the neutral pattern and the phase separation guide layer, the fine pattern layer including a first block and a second block; wherein each of the plurality of second openings of the second pattern has a width that is equal to about half the width of any one of the first openings of the first pattern.