Patent ID: 11955350
Assignee: SCREEN HOLDINGS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  F | IPC F  H

Claim 0:
1. A substrate processing apparatus for processing a surface of a substrate by a processing fluid, comprising:
a substrate holder in the form of a flat plate, the substrate being placeable in a horizontal posture on an upper surface of the substrate holder;
a chamber including a processing space capable of accommodating the substrate holder having the substrate placed thereon and a side surface having an aperture that communicates with the processing space and allows the substrate holder to pass through; and
a lid part configured to close the aperture by coming into contact with the chamber via a sealing member,
wherein:
the substrate holder projects on a chamber side surface of the lid part and the lid part closes the aperture with the substrate holder inserted in the processing space,
the chamber is provided with an introduction flow passage for receiving the processing fluid from outside the chamber and introducing the processing fluid into the processing space,
the introduction flow passage is open to the processing space on a side further backward than the substrate in the processing space when viewed from the aperture,
a ceiling surface of the processing space and an upper surface of the substrate holder are facing each other in parallel across a gap on a side closer to the aperture than the substrate in the processing space, thereby forming an upper flow passage having a constant flow passage cross-sectional shape, the processing fluid having passed above the substrate flowing in the upper flow passage,
the upper flow passage is formed by being surrounded by the lid part, the chamber and the sealing member and connected to a buffer space having a larger flow passage cross-sectional area than the upper flow passage, and
a discharge flow passage for discharging the processing fluid to the outside of the chamber is connected to the buffer space.