Patent ID: 8721846

Claim:
A film forming method, comprising: a mounting step of mounting a substrate on a mounting member after loading the substrate into a reaction chamber; an adsorbing step of adsorbing a compound of a first metal on a surface of the substrate by supplying a source gas containing the compound of the first metal into the reaction chamber; a reducing step of reducing the compound of the first metal adsorbed on the substrate by making a reducing gas contact therewith while supplying energy for a reducing reaction to the compound, to thereby obtain a first metal layer; and an alloying step of alloying the first metal and a second metal to obtain an alloy layer of the first metal and the second metal by injecting the second metal into the first metal layer, the second metal being ejected from a target electrode facing the substrate by making a sputtering plasma contact with the target electrode, the sputtering plasma being obtained by activating a sputtering gas, and at least a surface of the target electrode being formed of the second metal different from the first metal, wherein one or more cycles are performed repeatedly, each cycle including the adsorbing step, the reducing step and the alloying step, wherein the reducing step and the alloying step are simultaneously performed after the adsorbing step, so that occurrence of discontinuities in the alloy layer due to aggregation of the first metal is suppressed, and wherein the target electrode is pre-coated with a layer of the second metal and the second metal has a melting point higher than or equal to a melting point of the first metal.