Patent ID: 9659790
Date: 2017-05-23
CPC Classifications: H01L

Claim:
1. A method of forming a pattern, the method comprising: forming a feature layer on a substrate; forming a mask layer on the feature layer; forming a plurality of guides regularly arranged with a first pitch on the mask layer in a first region and a plurality of dummy guides regularly arranged with the first pitch on the mask layer in a second region spaced apart from the first region with a separation region therebetween, the separation region having a width greater than the first pitch; forming a block copolymer layer, the block copolymer layer surrounding the plurality of guides and the plurality of dummy guides, on the mask layer; phase-separating the block copolymer layer to form a self-assembled layer including a plurality of first domains regularly arranged along with the plurality of guides in the first region and a plurality of first dummy domains regularly arranged along with the plurality of dummy guides in the second region; forming a mask pattern by etching the mask layer using the self-assembled layer; and patterning the feature layer by transferring a shape of the mask pattern to the feature layer in the first region while blocking the shape of the mask pattern from being transferred to the feature layer in the second region.