Patent ID: 9564333
Date: 2017-02-07
CPC Classifications: C23C,H01L,Y02E

Claim:
1. A process for forming nickel silicide or cobalt silicide on a silicon-comprising substrate, said process comprising the steps of: bringing a surface of the silicon-comprising substrate into contact with an aqueous solution comprising gold ions and fluoride ions in order to form particles of metallic gold on said surface, wherein the aqueous solution comprises a surface-active agent selected from the group consisting of compounds comprising at least one anionic or one nonionic polar group, and one alkyl chain comprising from 10 to 16 carbon atoms depositing—by an electroless route—a layer essentially composed of nickel or of cobalt, on the obtained surface covered with particles of metallic gold, wherein the thickness of the layer is between 10 and 45 nm, and the variation in the thickness of the layer is less than 10%, and applying a rapid thermal annealing at a temperature of between 300° C. and 750° C., so as to form nickel silicide or cobalt silicide.