Substrate processing method

A substrate processing method for collectively processing a plurality of substrates having directions defined by a front surface and a back surface, the substrate processing method comprising:

• a substrate group acquisition process of acquiring a substrate group in which substrates oriented in one direction are arranged at a predetermined interval;
• a first assembly process of positioning a first substrate at a first position among the first position and a second position that divide the predetermined interval in the substrate group into three by combining a first arrangement in which the first substrate oriented in the one direction is arranged at the predetermined interval with the substrate group;
• a second assembly process of forming a temporary batch lot by positioning a second substrate at the second position by combining a second arrangement in which the second substrate oriented in the one direction is arranged at the predetermined interval with the substrate group;
• a disassembly process of disassembling the temporary batch lot by dividing the substrates into a first set and a second set such that two substrates facing each other among substrates constituting the temporary batch lot form different sets, and moving the first set and the second set relative to each other in a direction orthogonal to an arrangement direction of the substrates;
• a half-rotation process of orienting the substrates constituting the second set in a direction opposite to the one direction by half-rotating the second set;
• a rearrangement process of combining the first set and the second set to generate a batch lot such that the substrates oriented in the one direction and the substrates oriented in the opposite direction are alternately arranged;
• and
• a processing process of immersing the batch lot in a processing liquid.