Patent ID: 9040429
Filing Date: 2015-05-26
Classification: B81C,H01L

Abstract:
1. A pattern formation method, comprising: forming a first layer on a substrate; forming a second layer on the first layer; forming a resist pattern on the second layer in a line and space pattern, the space pattern having openings that expose a portion of the second layer; removing the resist pattern to form a first region and a second region on the second layer, wherein the first region has a greater hydrophobicity than the second region; forming a neutralization film on the second layer; removing the neutralization film; forming a directed self-assembly material layer containing a first segment and a second segment on the second layer after the neutralization film is removed; microphase separating the directed self-assembly material layer to form a self-assembled pattern containing a first polymer part that includes the first segment and a second polymer part that includes the second segment; and removing either the first polymer part or the second polymer part, using the other as a mask to process the first layer.