Patent ID: 7968413
Filing Date: 2011-06-28
Classification: H01L

Abstract:
1. A method of processing a substrate, comprising: forming a gate dielectric on a substrate having a first conductivity; forming a gate electrode on the gate dielectric; implanting a first dopant in the substrate to form first source/drain regions having a second conductivity on opposite sides of the gate electrode; forming a pair of sidewall spacers along laterally opposite sidewalls of the gate electrode, wherein the pair of sidewall spacers cover a first portion of the first source/drain regions while leaving a second portion of the first source/drain regions exposed; implanting the first dopant to increase a depth of the second portion of the first source/drain regions; removing a portion of the pair of sidewall spacers to expose some of the first portion of the first source/drain regions; etching a pair of feature definitions in the first source/drain regions on opposite sides of the gate electrode, wherein the etching removes at least a portion of the exposed first source/drain regions; and depositing a silicon containing material selectively in the feature definitions to form second source/drain regions.