Patent ID: 8257790

Claim:
A Ti-containing film formation method for forming a Ti-containing film on a surface of a target object placed on a susceptor inside a chamber of a film formation apparatus, while supplying a process gas containing TiCl 4 gas into the chamber from a showerhead that has a number of gas injection holes formed therein and facing the susceptor, the showerhead including an Ni-containing material member that defines a surface with the gas injection holes formed therein and part of inner gas passages connected to the gas injection holes, the method comprising: preparing the film formation apparatus such that a first heater is disposed inside the susceptor and configured to be supplied with electricity from a first power supply to set a temperature of the susceptor and a second heater is disposed inside the showerhead and configured to be supplied with electricity from a second power supply other than the first power supply to set a temperature of the showerhead; then performing formation of a Ti pre-coating film on the surface of the showerhead inside the chamber with no target object present therein; then performing formation of a Ti-containing film on a predetermined number of target objects one by one inside the chamber, the formation of a Ti-containing film including performing formation of a Ti film; each of the formation of the Ti pre-coating film and the formation of the Ti film being performed while heating the susceptor by the first heater, setting the showerhead at a temperature of 300 to 450° C., and supplying the process gas from the showerhead into the chamber with the TiCl 4 gas set at a flow rate of 1 to 12 mL/min (sccm) or the TiCl 4 gas set at a partial pressure of 0.1 to 2.5 Pa; and then performing cleaning inside the chamber with no target object present therein, while setting the showerhead at a temperature of 200 to 300° C. by the second heater, and supplying a fluorine-containing cleaning gas from the showerhead into the chamber.