Patent ID: 9202915
Filing Date: 2015-12-01
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a gate structure disposed over a semiconductor substrate; a trench in semiconductor material of the semiconductor substrate adjacent the gate structure, wherein a bottom surface of the trench has a first crystal plane orientation of the semiconductor material, and two opposing side surfaces of the trench have a second crystal plane orientation of the semiconductor material, the first crystal plane orientation being different from the second crystal plane orientation; and a substantially pure germanium (Ge) epitaxy feature formed within the trench on the substrate and interfacing the bottom surface and the two opposing side surfaces of the trench, wherein the feature is formed of an epi film by a bottom-up growth process prohibiting growth on the two opposing side surfaces by providing an etch component, wherein the resultant epitaxy feature is such that a side surface of the Ge epitaxy is substantially free of dislocation defects, and wherein the resultant epitaxy feature has a crystal plane orientation defined by the bottom surface of the trench including adjacent the two opposing side surfaces; and wherein the epitaxy feature provides one of a source and a drain associated with the gate structure.