Patent ID: 8008194

Claim:
A method of manufacturing a semiconductor device comprising: forming a metal alloy film of a metal and a noble metal over a semiconductor substrate having a region where silicon is partially exposed; selectively reacting by thermal processing the silicon in the region with the metal alloy film to form a metal silicide film containing the metal and the noble metal on the region; and removing the metal alloy film remaining unreacted by using a solution, which is a mixture liquid of sulfuric acid and hydrogen peroxide, a mixture liquid of ammonia and hydrogen peroxide, or a mixture liquid of hydrochloric acid and hydrogen peroxide, with a transition metal, which has higher ionization tendency than the metal, dissolved in the solution, wherein the transition metal forms in the solution a metal hydrate complex thereof, in removing the metal alloy film, the noble metal in the metal alloy film is removed by coordinating the noble metal by the metal hydrate complex.