摘要 |
Disclosed is a substrate processing apparatus, comprising a processing chamber, a holder to hold at least a plurality of product substrates, a heating member, a supplying member to alternately supply at least a first reactant and a second reactant, and a control unit, wherein the control unit executes forming thin films on the substrates by supplying the first reactant, removing a surplus of the first reactant after the first reactant has been adsorbed on the product substrates, subsequently supplying the second reactant, to cause the second reactant to react with the first reactant adsorbed on the substrates, and executes the forming the thin films in a state where a number of the product substrates is insufficient when a number of the product substrates is less than a maximum number of the product substrates which can be held by the holder.
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