Patent ID: 7022595
Filing Date: 2006-04-04
Classification: H01L

Abstract:
1. A method for a selective formation of a suicide on a silicon wafer that comprises exposed regions to be silicided and exposed regions not to be silicided, the method comprising the following steps: a) forming a resist layer on top of the exposed regions not to be silicided; b) implanting ions through said resist layer, the implanting step forming an implantation residue layer in the exposed regions not to be silicided, said implantation residue layer being resistant to suicide formation; c) removing the resist layer; d) depositing a metal layer on the wafer, said metal layer being capable of forming a silicide by thermal reaction with the silicon; e) performing a heat treatment suitable for siliciding the metal layer deposited at step d); and f) removing metal portions of the metal layer that have not reacted to the heat treatment of step e).