Patent ID: 7943512

Claim:
A method for fabricating a metal silicide layer, comprising: providing a silicon material layer; forming a metal alloy layer on the silicon material layer, wherein the metal alloy layer contains platinum and nickel; performing a first rapid thermal process (RTP) so as to form a metal alloy silicide layer through reaction of silicon in the silicon material layer with the metal alloy layer; and performing a first etching process on a rotation platen by using a cleaning solution at a lower rotation speed to remove the metal alloy layer that is not fully reacted, wherein the cleaning solution is a mixture of a sulfuric acid solution and a diluted hydrogen peroxide solution, and performing a second etching process on the rotation platen at a higher rotation speed to further remove the metal alloy layer that is not fully reacted, wherein water is co-applied with the cleaning solution in the second etching process when a mixing ratio of the sulfuric acid solution to the diluted hydrogen peroxide solution is larger than 1/1.