Patent ID: 9248693
Filing Date: 2016-02-02
CPC Classification: B44C,B82Y,G03F,H01L

Claim Text:
1. A patterning process which uses self-assembly, the patterning process comprising: forming a silicon-containing film by applying a silicon-containing film composition onto a substrate to be processed followed by heating, wherein the silicon-containing film composition contains a silicon-containing compound whose main chain is polysiloxane, the silicon-containing compound containing an organic substituent group having a hydroxyl group thereof substituted with an acid labile group or a carboxyl group thereof substituted with an acid labile group, pattern-exposing the silicon-containing film to a high energy beam, followed by a heat treatment thereof, forming a polymer film by applying a self-assembling polymer onto exposed and unexposed portions of the silicon-containing film, self-assembling the polymer film by a heat treatment to form a microdomain structure, forming a pattern by dry-etching the polymer film having the microdomain structure, transferring the pattern to the silicon-containing film by dry-etching by using the pattern formed on the polymer as a mask, and transferring the pattern to the substrate to be processed by dry-etching by using the pattern transferred to the silicon-containing film as a mask.