Patent ID: 11905603
Assignee: TOKYO ELECTRON LIMITED
Field: Semiconductors (Electrical engineering)
Classification: CPC C  H | IPC C

Claim 0:
1. A substrate processing apparatus comprising:
a mixer configured to mix sulfuric acid as a first component and a second component different from the first component to prepare an etchant;
a nozzle connected to the mixer and configured to eject the etchant to a substrate;
a first component supplier including a first flow path configured to supply the first component to the mixer, a first instantaneous flowmeter provided in the first flow path, and a first flow rate controller provided in the first flow path;
a second component supplier including a second flow path different from the first flow path and configured to supply the second component to the mixer, a second instantaneous flowmeter provided in the second flow path, and a second flow rate controller provided in the second flow path; and
a controller configured to control the first component supplier and the second component supplier,
wherein the controller is configured to control the first flow rate controller and the second flow rate controller and is configured to use an average flow rate of the first component and an average flow rate of the second component during the ejection of the etchant to the substrate for controlling the first flow rate controller and the second flow rate controller.