Patent ID: 8273408

Claim:
A method of depositing a ruthenium film, the method comprising: loading a substrate into a reactor; conducting a plurality of first and second deposition cycles, at least one of the first deposition cycles comprising steps of: supplying a ruthenium precursor to the reactor; supplying oxygen (O 2 ) gas to the reactor, wherein supplying the oxygen gas comprises supplying the oxygen gas simultaneously with supplying the ruthenium precursor; and supplying ammonia (NH 3 ) gas to the reactor after supplying the ruthenium precursor and the oxygen gas without supplying the ruthenium precursor and the oxygen gas; after the at least one of the first deposition cycles, conducting one or more second deposition cycles, wherein at least one of the second cycles comprises steps of: supplying the ruthenium precursor the reactor; and supplying oxygen gas to the reactor after supplying the ruthenium precursor, wherein ammonia gas is not supplied in the second cycles; and supplying ammonia gas to the reactor subsequent to the one or more second cycles; wherein the temperature of the reactor is maintained at about 200° C. to about 400° C.