Patent ID: 8158335
Filing Date: 2012-04-17
Classification: G03F,H01L

Abstract:
1. A lithography method comprising: forming a first patterned resist layer including at least one opening therein over a substrate, wherein the first patterned resist layer does not itself contain sufficient acid; performing a hardening process to the first patterned resist layer; forming a water-soluble polymer layer over the first patterned resist layer and the substrate, wherein the forming of the water-soluble polymer layer includes performing an acid treatment to the water-soluble polymer layer, whereby a reaction occurs at the interface of the first patterned resist layer and the water-soluble polymer layer; and forming a second patterned resist layer over the substrate, wherein at least one portion of the second patterned resist layer is disposed within the at least one opening of the first patterned resist layer or abuts at least one portion of the first patterned resist layer.