Slurry recycling system and method for CMP apparatus

Details Slurry recycling system and method for CMP apparatus Slurry recycling system and method for CMP apparatus

2005-03-15

2005-03-15

Fortuna, Ana (Department: 1723)

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

C210S651000, C210S641000, C210S195200, C210S257200, C210S639000, C134S010000, C134S902000

Reexamination Certificate

active

06866784

ABSTRACT:
A slurry recycling system for use in a chemical mechanical polishing (CMP) apparatus for polishing a workpiece by using a slurry containing an abrasive, a pH agent and a deionized water is provided. The slurry recycling system includes a slurry collection tank for storing the slurry used in the CMP apparatus as a recyclable slurry; an ultra filter for separating, from the recyclable slurry, a fluid ingredient containing the pH agent and the deionized water and the abrasive to allow the abrasive to be reintroduced into the slurry collection tank; and a reverse osmosis filter for separating, from the fluid ingredient, the pH agent and the deionized water to allow the pH agent to be reintroduced into the slurry collection tank and to allow the deionized water to be discharged out.

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