Patent ID: 11862567
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H  C | IPC C  H

Claim 0:
1. A method of forming a contact to a semiconductor device comprising:
forming a nickel platinum semiconductor alloy on a silicon contact;
depositing a titanium layer having an angstrom scale thickness in contact with the nickel platinum semiconductor alloy;
forming an aluminum containing fill on the titanium layer;
forming a metal nitride layer and metal containing contact to complete a material stack beginning with the nickel platinum semiconductor alloy; and
applying anneal after at least said depositing the titanium layer to the material stack to provide a contact alloy comprising nickel, platinum, aluminum, titanium and a semiconductor element from the contact surface of the semiconductor device, the contact alloy comprising nickel (Ni) ranging from 20 at. % to 30 at. %, platinum (Pt) ranging from 0 at. % to 10 at. %, aluminum (Al) ranging from 40 at. % to 60 at. %, and silicon (Si) ranging from 5 at. % to 20 at. %.