Patent ID: 8753940
Filing Date: 2014-06-17
Classification: H01L

Abstract:
1. A method, comprising: forming a plurality of trenches in a semiconducting substrate to thereby define a plurality of fins, each of said fins having an upper surface; forming a layer of overfill material that overfills said trenches, an upper surface of said overfill material being positioned above said upper surface of said fins; forming a masking layer above said layer of overfill material, said masking layer having an opening that is positioned above a subset of said plurality of fins that is desired to be removed, wherein said subset of fins is comprised of at least one but less than all of said plurality of fins; performing at least one first etching process through said masking layer to remove at least a portion of said layer of overfill material and thereby expose an upper surface of said subset of fins; and performing at least one second etching process on said exposed surface of said subset of fins to remove said subset of fins.