Patent ID: 9685509
Date: 2017-06-20
CPC Classifications: H01L

Claim:
1. A finFET device comprising: a high mobility semiconductor material in a fin structure, providing a channel region for the finFET device, wherein the high mobility semiconductor material includes any element from Group II through Group VI; a source/drain recess, adjacent to the fin structure; and a graded composition epi-grown semiconductor alloy material, including a component of the high mobility semiconductor material, in the source/drain recess, wherein the graded composition epi-grown semiconductor alloy material is graded as a function of a distance from a horizontal interface of the graded composition epi-grown semiconductor alloy material and the fin structure and as the function of a distance from a vertical interface of the graded composition epi-grown semiconductor alloy material and the fin structure, wherein the graded composition epi-grown semiconductor alloy material is graded in a first direction that is orthogonal to the horizontal interface and in a second direction that is orthogonal to the vertical interface.