Patent ID: 7779785

Claim:
A substrate processing apparatus, comprising: a processing chamber in which a substrate is to be accommodated; a first supply section to supply a first reactant into the processing chamber; a second supply section to supply a second reactant into the processing chamber; a third supply section to supply a third reactant into the processing chamber; a exhausting section to evacuate the processing chamber; an exciting section to plasma-excite the third reactant; and a control section to control the first to third supply section, the exhaust section and the exciting section, wherein the control section controls the first to third supply section, the exhausting section and the exciting section, to repeat the following first to fifth steps predetermined times until a thin film having a desired thickness is formed: the first step of supplying the first reactant to the substrate accommodated in the processing chamber to cause a ligand-exchange reaction between a ligand as a reactive site existing on a surface of the substrate and a ligand of the first reactant; the second step of removing a surplus of the first reactant from the processing chamber; the third step of supplying a second reactant to the substrate to cause a ligand-exchange reaction to change the ligand after the exchange in the first step into a reactive site; the fourth step of removing a surplus of the second reactant from the processing chamber; and the fifth step of supplying a plasma-excited third reactant to the substrate to cause a ligand exchange reaction to exchange a ligand which has not been exchange-reacted into the reactive site in the third step into the reactive site.