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

Claim 6:
7. The substrate processing apparatus according to claim 1, wherein:
a lower surface of the substrate holder and a bottom surface of the processing space are facing each other in parallel across a gap on the side closer to the aperture than the substrate in the processing space, thereby forming a lower flow passage having a constant flow passage cross-sectional shape, the processing fluid having passed below the substrate flowing in the lower flow passage,
the lower flow passage is formed by being surrounded by the lid part, the chamber and the sealing member and connected to a lower buffer space having a larger flow passage cross-sectional area than the lower flow passage, and
a lower discharge flow passage for discharging the processing fluid to the outside of the chamber is connected to the lower buffer space.