Patent ID: 11955352
Assignee: TOKYO ELECTRON LIMITED
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A substrate processing apparatus, comprising:
a heater configured to raise a temperature of a sulfuric acid supplied from a sulfuric acid source;
a sulfuric acid supply line configured to supply the sulfuric acid, whose temperature has been raised by the heater, to a mixing part;
a liquid supply line configured to supply a moisture-containing liquid from a moisture-containing liquid source to the mixing part;
the mixing part configured to mix the sulfuric acid from the sulfuric acid supply line with the moisture-containing liquid from the liquid supply line to generate a mixed solution; and
a nozzle configured to discharge the mixed solution onto a substrate inside a substrate processing part,
wherein the mixing part includes:
a joining portion where the sulfuric acid supply line and the liquid supply line are joined; and
a reaction suppression mechanism including a U-shaped pipe buffer portion, which is provided in the liquid supply line, and configured to suppress a reaction between the sulfuric acid, whose temperature has been raised by the heater, and the moisture-containing liquid in the joining portion, and

wherein the U-shaped pipe buffer portion has an uppermost portion provided at a position higher than the joining portion.