Patent ID: 11935739
Assignee: TOKYO ELECTRON LIMITED
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 18:
19. The substrate processing method of claim 16, wherein ejecting the gas comprises spraying the gas to the liquid arrival point on the substrate of the processing liquid ejected from the ejection port of the processing liquid nozzle, and
when a circle, which is centered on a foot of a perpendicular line drawn from the liquid arrival point to the rotation axis and has a radius corresponding to a line segment connecting the foot and the liquid arrival point, is defined to be located on a plane orthogonal to the rotation axis,
when an angle formed between a vector indicating an orientation of a main stream of the processing liquid separated to an outside of the substrate from the liquid arrival point when viewed in a direction of the rotation axis and a tangential line of the circle at the liquid arrival point is an angle θS,
the processing liquid nozzle ejects the processing liquid such that the angle θS becomes a first angle smaller than 90 degrees when the gas is not ejected from the gas nozzle, and
the gas nozzle ejects the gas so as to change the direction of the processing liquid separated from the liquid arrival point such that the angle θS becomes a second angle closer to 90 degrees than the first angle.