Patent ID: 8889537

Claim:
A method for formation of a segregated interfacial dopant layer at a junction between a semiconductor material and a silicide layer, the method comprising: forming a first insulator region and a second insulator region in a semiconductor substrate comprising a semiconductor material, such that a contact area comprising the semiconductor material of the semiconductor substrate is located between the first insulator region and the second insulator region; depositing a doped metal layer comprising one or more of nickel, platinum and titanium over the contact area; annealing the doped metal layer and the contact area, wherein the anneal causes a portion of the doped metal layer and a portion of the semiconductor material of the contact area to react to form the silicide layer on a remaining portion of the contact area, and wherein the anneal further causes the segregated interfacial dopant layer to form between the remaining portion of the contact area and silicide layer, the segregated interfacial dopant layer comprising dopants from the doped metal layer; and removing an unreacted portion of the doped metal layer from the silicide layer.