Patent ID: 7863195
Filing Date: 2011-01-04
Classification: B24B,Y10T

Abstract:
1. A method for manufacturing a semiconductor device, the method comprising: determining an initial mixing amount of an oxidizing agent to be supplied to a preparation tank less than the amount required for the oxidizing agent to match a predetermined target concentration of the oxidizing agent in slurry; under control of a controller, supplying a slurry stock solution and the determined initial mixing amount of the oxidizing agent to the preparation tank and mixing the slurry stock solution and the determined initial mixing amount of the oxidizing agent in the preparation tank so that the concentration of the oxidizing agent in the slurry is less than the predetermined target concentration; detecting the concentration of the oxidizing agent in the slurry; then under control of a controller, additionally supplying the oxidizing agent to the preparation tank in accordance with the detected result so that the concentration of the oxidizing agent in the slurry becomes equal to the predetermined value; and polishing a wafer with the slurry in the preparation tank.