Patent ID: 8658247

Claim:
A film deposition method for depositing a silicon oxide film on a metal containing film formed on an object to be processed, using a film deposition apparatus including: a process chamber that accommodates the object to be processed, said process chamber including an inner cylindrical chamber and an outer cylindrical chamber which substantially entirely covers the inner cylindrical chamber; a source gas supplying system that includes a first on-off valve and supplies a source gas to the process chamber; a reaction gas supplying system that includes a second on-off valve and supplies a reaction gas to the process chamber; a vacuum evacuation system that includes a third on-off valve and evacuates the process chamber to vacuum, the film deposition method comprising alternately repeating an adsorption step and a reaction step with an interval period therebetween, the adsorption step including opening the first on-off valve of the source gas supplying system for a predetermined time period thereby to supply the source gas to the process chamber, closing the first valve after the predetermined time period elapses, and confining the source gas within the process tube for a hold period, thereby allowing the source gas to be adsorbed on the object to be processed, while the third on-off valve of the vacuum evacuation system is closed, and the reaction step including opening the second on-off valve of the reaction gas supplying system thereby to supply the reaction gas to the process chamber, thereby allowing the source gas and the reaction gas to react with each other thereby to produce a thin film on the object to be processed, wherein the adsorption step further includes increasing the hold period so that a film deposition rate of the silicon oxide film per cycle is linearly increased.