Patent ID: 6913996

Claim:
A method of forming a film on an object to be processed and held in a processing vessel, comprising: heating said object in said processing vessel while introducing an inert gas into said processing vessel; interrupting supplying of said inert gas and evacuating said processing vessel to a vacuum state; supplying a first source gas into said processing vessel so as to expose said object to said first source gas such that adsorption of said first source gas to said object occurs under a saturating condition in which an adsorption rate of said first source gas to said object is saturated; interrupting supplying of said first source gas to said processing vessel and evacuating said processing vessel to a vacuum state; supplying a second source gas into said processing vessel so as to expose said object, on which said first source gas is adsorbed, to said second source gas such that adsorption of said second source gas to said object occurs under a saturating condition in which an adsorption rate of said second source gas to said object is saturated; interrupting supplying of said second source gas and evacuating said processing vessel to a vacuum state; causing a reaction between said first source gas and said second source gas adsorbed on said object to form a film; and repeating said supplying said first source gas, interrupting said supplying of said first source gas, evacuating said processing vessel to a vacuum state, supplying said second source gas, interrupting supplying of said second source gas, and evacuating said processing vessel to a vacuum state a plurality of times to form said film.