Patent ID: 8476137

Claim:
A method, comprising: providing a substrate, the substrate having a top surface; forming a common stack material on the substrate top surface; forming a material layer on the common stack material; patterning the material layer, thereby defining a plurality of trenches and a plurality of patterned material structures; forming a first masking material in a first portion of the plurality of trenches and on a first portion of the plurality of patterned material structures, proximate the first portion of the plurality of trenches; forming a first channel material in a second portion of the plurality of trenches; removing the first masking material; forming a second masking material on the first channel material and on a second portion of the plurality of patterned material structures, proximate the first channel material; forming a second channel material in the first portion of the plurality of trenches; recessing the first portion of the patterned material structures, creating an asymmetry in the height across the plurality of patterned material structures; removing the second masking material; and recessing the plurality of patterned material structures.