Patent ID: 9202894
Filing Date: 2015-12-01
Classification: H01L

Abstract:
1. A method, comprising: forming a plurality of trenches that define a fin structure comprising a first layer of a first semiconductor material and a second layer of a second semiconductor material positioned above a substrate, wherein said first and second semiconductor materials are selectively etchable relative to one another; performing at least one etching process that exposes opposing end surfaces of said first and said second layers; performing at least one recess etching process that removes end portions of said first layer and defines a cavity on opposite ends of said first layer, said cavities being positioned vertically adjacent to end portions of said second layer; performing an epitaxial deposition process that fills each of said cavities with a support structure comprising a third semiconductor material; and performing an etching process to selectively remove remaining portions of the recessed first layer relative to said second layer and said support structures, wherein the end portions of said second layer and said support structures define pillars on opposite ends of said fin structure.