Substrate processing method for film formation

摘要

A film-forming method that includes providing a substrate to be film-formed in a reaction chamber of an apparatus that includes: the reaction chamber; a first gas supply pipe in fluid communication with the reaction chamber for carrying a first processing gas to the reaction chamber; a second gas supply pipe in fluid communication with the reaction chamber for carrying a second processing gas to the reaction chamber; a gas reservoir in fluid communication with the first gas supply pipe; and a bypass line in fluid communication with the first gas supply pipe, the bypass line bypassing the gas reservoir; and the steps of alternately supplying the first processing gas and the second processing gas into the reaction chamber a plurality of times to form a film on the substrate, and wherein when the first gas is supplied, the gas reservoir or the bypass line is selected to supply the first gas into the reaction chamber through the first gas supply pipe, and when the second gas is supplied the second gas is supplied through the second gas supply pipe.