Patent ID: 8222151
Filing Date: 2012-07-17
Classification: H01L

Abstract:
1. A method, comprising: forming a hard mask layer overlying a substrate; forming a capping layer overlying the hard mask layer, the capping layer and the hard mask layer comprising different materials; forming a first resist pattern overlying the capping layer; etching the capping layer using the first resist pattern as an etch mask to form a first patterned capping layer having a plurality of openings therein; removing the first resist pattern; forming a second resist pattern overlying the first patterned capping layer; etching the first patterned capping layer using the second resist pattern as an etch mask to form a second patterned capping layer having at least one opening therein, wherein the at least one opening is positioned between two of the plurality of openings; and removing the second resist pattern; wherein the hard mask layer