Patent ID: 7883746

Claim:
An insulating film formation method comprising: the step (a) of supplying a first material gas onto a plurality of substrates aligned at given intervals within a chamber of a substrate processing apparatus in the perpendicular direction of the chamber, thereby forming an atomic layer on each of the plurality of substrates; the step (b) of supplying, after the step (a), a first supply amount of a second material gas onto the plurality of substrates to allow the second material gas to react with the atomic layer on each of the substrates in a non-equilibrium state; and the step (c) of supplying, after the step (a), a second supply amount of the second material gas onto the plurality of the substrates to allow the second material gas to react with the atomic layer in an equilibrium state, wherein steps (a) and (b) are repeatedly carried out alternately M (1≦M) times and then the steps (a) and (c) are repeatedly carried out alternately N (1≦N) times, so as to form an insulating film, the non-equilibrium state in the step (b) is a state in which a forming rate of the insulating film is not saturated under the first supply amount of a second material gas, and in the step (c), the second supply amount is larger than the first supply amount and the forming rate of the insulating film is saturated.