Patent ID: 8796759

Claim:
A FinFET device comprising: a semiconductor substrate; a fin structure disposed over the semiconductor substrate; a gate structure disposed on a portion of the fin structure, the gate structure traversing the fin structure, wherein the gate structure separates a source region and a drain region of the fin structure, the source and drain region defining a channel therebetween; and the source and drain region of the fin structure including a strained source and drain feature, wherein the strained source feature and the strained drain feature each include: a first portion having a first width and a first depth, wherein the first portion directly interfaces with the fin structure, and a second portion disposed below the first portion, the second portion having a second width defined by a first sidewall and a second sidewall, wherein the first and second sidewalls are substantially perpendicular to a top surface of the semiconductor substrate, and wherein the second portion has a second depth, wherein the first width is greater than the second width and the first depth is less than the second depth, wherein the second sidewall of the second portion directly interfaces with the fin structure, wherein the first and second portions are formed of entirely the same material.