Patent ID: 8802533
Filing Date: 2014-08-12
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, the method comprising: forming a gate stack on a semiconductor substrate; forming a gate spacer which covers the top of the gate stack and sidewalls of the gate stack; forming source/drain grooves; epitaxially growing a Halo material layer in the source/drain grooves, wherein the Halo material layer has a first doping element therein; epitaxially growing source/drain regions which apply stress to a channel region of the device, wherein the source/drain regions have a second doping element, opposite in conductivity to the first doping element, therein; isotropically etching the source/drain regions to remove portions of the source/drain regions, wherein the etching also removes portions of the Halo material layer directly under the gate spacer and extends to the channel region to some extent, wherein remaining portions of the Halo material layer constitute Halo regions of the device; and epitaxially growing an LDD material layer to form LDD regions of the device.