Patent ID: 9142673
Filing Date: 2015-09-22
Classification: H01L

Abstract:
1. A method comprising: obtaining an intermediate semiconductor device, comprising: forming at least one recess into the substrate, wherein the recess comprises a bottom and at least one sidewall exposing a portion of the at least one fin; depositing a first dielectric layer into the at least one recess; performing chemical mechanical planarization on the first dielectric layer; applying a first hard mask layer over the first dielectric layer; performing a first dry etch over the first hard mask layer to create a first barrier dielectric layer and expose at least a portion of the at least one sidewalls of the at least one fin; depositing a second dielectric layer over the intermediate semiconductor device; applying a second hard mask layer over the second dielectric layer; performing a second dry etch over the second hard mask layer to create a second barrier dielectric layer and expose at least a portion of the at least one sidewalls of the at least one fin; and performing selective epitaxial growth in the at least one recess over the barrier dielectric layer.