Patent ID: 11881419
Assignee: SCREEN HOLDINGS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A substrate processing apparatus comprising:
a substrate holding unit that holds a substrate;
a rotation unit that rotates a substrate held by the substrate holding unit around a rotational axis passing through a central portion of the substrate;
a chemical liquid supply unit that supplies a chemical liquid to a main surface of a substrate held by the substrate holding unit;
a cylindrical first guard that surrounds a periphery of the substrate holding unit and that captures a liquid expelled from a substrate held by the substrate holding unit;
a guard elevating/lowering unit that raises and lowers the first guard; and
a controller that controls the rotation unit, the chemical liquid supply unit, and the guard elevating/lowering unit,
the controller executing: a chemical liquid supply step of supplying a chemical liquid by the chemical liquid supply unit to a main surface of a substrate held by the substrate holding unit while rotating the substrate around the rotational axis by the rotation unit; a processing-height maintaining step of maintaining the first guard at a processing height position by the guard elevating/lowering unit in parallel with the chemical liquid supply step such that the first guard captures the chemical liquid supplied to the main surface of the substrate and expelled from the substrate to be incident on a first region of the first guard; and a cleaning-height maintaining step of maintaining the first guard at a cleaning height position lower than the processing height position by the guard elevating/lowering unit in parallel with the chemical liquid supply step after the processing-height maintaining step such that the first guard captures the chemical liquid supplied to the main surface of the substrate and expelled from the substrate to be incident on a second region of the first guard that is higher in position than the first region with respect to the first guard.