Patent ID: 8828253
Filing Date: 2014-09-09
Classification: B44C,B81C,G03F,H01L

Abstract:
1. A method of lithography on a surface of a substrate having a self-assembled polymer layer thereon comprising first and second chemically-distinct domains arranged in a pattern across the layer, the method comprising: forming a planarization layer over the layer of self-assembled polymer, the planarization layer having a first portion over the first domain and a second portion over the second domain; applying a development etch to the planarization layer to substantially remove the second portion leaving at least part of the first portion as a cap substantially covering the first domain to form capped first domain; substantially removing the second domain from the surface, leaving the capped first domain as a pattern feature on the surface; and transferring the pattern feature to the substrate using the capped first domain as an etch resist.