Patent ID: 8524565
Filing Date: 2013-09-03
Classification: H01L

Abstract:
1. A method for forming a semiconductor device, comprising: forming an active region and an isolation region surrounding the active region on a semiconductor substrate; forming a gate stack structure, wherein the gate stack structure is formed on the active region and extends onto the isolation region; and forming an S/D region, wherein the S/D region is embedded into the semiconductor substrate in the active region and located at both sides of the gate stack structure; wherein the step of forming the S/D region comprises: determining an interface region comprising the active region of a partial width abutting the isolation region, and forming an auxiliary layer covering the interface region; removing the semiconductor substrate of a partial thickness in the active region using the auxiliary layer, the gate stack structure and the isolation region as a mask, so as to form a groove; growing a semiconductor material in the groove for filling into the groove; and removing the auxiliary layer.