Patent ID: 9449827
Filing Date: 2016-09-20
CPC Classification: H01L

Claim Text:
1. A semiconductor structure comprising: at least one contact opening located in a dielectric material and extending to an uppermost surface of a semiconductor substrate; a first transition metal liner comprising at least one first transition metal element lining at least sidewalls of said at least one contact opening and directly contacting a portion of said uppermost surface of said semiconductor substrate; a second transition metal liner located on a surface of said first transition metal liner and comprising at least one second transition metal element that is different from said at least one first transition metal element; a metal contact located on a surface of said second transition metal liner; and a metal semiconductor alloy contact located at a bottom of said opening and forming an interface with a portion of said semiconductor substrate, wherein said metal semiconductor alloy contact comprises said at least one first transition metal element formed from a portion of said first transition metal liner, said at least one second transition metal element formed from a portion of said second transition metal liner, and a semiconductor element of said semiconductor substrate, wherein outermost sidewall surfaces of said metal semiconductor alloy contact are in direct physical contact with at least a portion of an inner sidewall surface of said first transition metal liner.