Patent ID: 8835309
Filing Date: 2014-09-16
Classification: H01L

Abstract:
1. A method of performing a silicide contact process, the method comprising: forming a nickel-platinum alloy (NiPt) layer over a semiconductor device structure; performing a first rapid thermal anneal (RTA) so as to react portions of the NiPt layer in contact with semiconductor regions of the semiconductor device structure, thereby forming metal rich silicide regions; performing a first wet etch to remove at least a nickel constituent of unreacted portions of the NiPt layer, the first wet etch comprising a standard clean (SC-1) etch using ammonium hydroxide (NH performing a second wet etch using a dilute Aqua Regia treatment comprising nitric acid (HNO following the dilute Aqua Regia treatment, performing a second RTA to form final silicide contact regions from the metal rich silicide regions.