Patent ID: 7241683
Filing Date: 2007-07-10
Classification: H01L,Y10S

Abstract:
1. A method for forming features in an etch layer, comprising: forming a first mask over the etch layer wherein the first mask defines a plurality of spaces with widths; laterally etching the first mask wherein the etched first mask defines a plurality of spaces with widths, wherein the widths of the spaces of the etched first mask are greater than the widths of the spaces of the first mask; forming a sidewall layer over the etched first mask wherein the sidewall layer defines a plurality of spaces with widths that are approximately equal to the plurality of spaces defined by said forming a first mask over the etch layer; etching features into the etch layer through the sidewall layer, wherein the features have widths that are smaller than the widths of the spaces defined by the etched first mask; removing the mask and sidewall layer.