Patent ID: 7753761
Filing Date: 2010-07-13
Classification: B24B

Abstract:
1. A polishing liquid supplying device for supplying a polishing liquid over a surface of a polishing pad to polish a wafer, comprising: a liquid supply tube extending generally radially relative to the polishing pad; a polishing liquid supplying member which holds the polishing liquid over substantially an entire width of the liquid supplying member by capillary action, the liquid supplying member extending from a central portion toward a peripheral edge portion of the polishing pad in a radial direction by an amount equal to about 80% of the diameter of a wafer being polished on the polishing pad, and being positioned in a state in which a lower end of the supplying member is close to or in contact with the surface of the polishing pad and in which the liquid supplying member extends widthwise along the length of the liquid supplying tube, and a supply device which supplies the polishing liquid to an upper portion of the polishing liquid supplying member, wherein the polishing liquid supplying member is movable relative to the polishing pad as the polishing pad rotates to uniformly supply the polishing liquid to the surface of the pad.