Patent ID: 9105295
Filing Date: 2015-08-11
Classification: B81C,B82Y,G03F,G11B,H01L,Y10T

Abstract:
1. A method for patterning a substrate, said method comprising: patterning depressions into a resist layer over a substrate; depositing a mask layer over said resist layer at least partially filling said depressions; etching said mask layer to expose a top surface of said resist layer and leaving at least a portion of said mask layer in said depressions of said resist layer, wherein said mask layer over said top surface of said resist layer is etched at a faster rate than said mask layer in said depressions of said resist layer; removing exposed portions of said resist layer to expose portions of said substrate, wherein said at least a portion of said mask layer is undercut leaving a top surface wider than a bottom surface; and etching into exposed portions of said substrate.