Patent ID: 7392599

Claim:
A substrate processing method, said method comprising the steps of: containing a plurality of to-be-processed substrates in each of a plurality of containers; containing at least one dummy substrate having substantially the same mass as each of the to-be-processed substrates and made of a plate material, an outer edge surface of the plate material including at least side surfaces and a portion of two main surfaces being coated with a resin layer that is chemical-resistant, or a dummy substrate having substantially the same mass as each of the to-be-processed substrates and made of a plate material, the entire surfaces of said plate material being coated with resin layer that is chemical-resistant, in each said container as necessary to place the same total number of the to-be-processed substrates and said at least one dummy substrate in each said container; and placing the plurality of containers containing the dummy substrates to be symmetric about a rotation axis and processing the to-be-processed substrates while rotating the containers about the rotation axis.