Patent ID: 6676801
Filing Date: 2004-01-13
Classification: B24B,H01L

Abstract:
A pressure suppression device for a chemical mechanical polishing machine comprising a polishing table and a polishing head, wherein the polishing table further comprises a polishing pad and a polishing gas input through which a polishing gas is charged, the polishing gas generates a polishing pressure to apply to the polishing pad, and the polishing head for holding the wafer comprises a wafer gas input through which a wafer gas is charged, and the wafer gas generates a wafer pressure to apply to the wafer, the pressure suppression device comprising:a pressure releasing component; and an gas inlet tube coupled to the wafer gas input and the pressure releasing component, so that the wafer gas is input into the pressure releasing component, a part of the wafer pressure is released when wafer pressure is larger than the polishing pressure until the wafer pressure is smaller than the polishing pressure.