Patent ID: 8679973

Claim:
A method of manufacturing a semiconductor device comprising: forming a transistor including a gate electrode above a semiconductor substrate and a source/drain diffused layer in the semiconductor substrate; forming a nickel film containing no platinum over the semiconductor substrate, covering the gate electrode and the source/drain diffused layer; forming a nickel platinum film over the nickel film by sputtering using a nickel target with platinum; after forming the nickel platinum film making a first thermal processing to react the nickel film and the nickel platinum film with the source/drain diffused layer to form a nickel platinum silicide film; and removing an unreacted part of the nickel platinum film using a chemical liquid, the chemical liquid being an acid chemical liquid containing sulfuric acid and hydrogen peroxide, an acid chemical liquid containing hydrochloric acid and hydrogen peroxide, or an alkaline chemical liquid containing ammonia and hydrogen peroxide.