Patent ID: 8118646

Claim:
A carrier for a double-side polishing apparatus which polishes both surfaces of a wafer having a chamfered portion on an outer edge thereof, the carrier comprising at least: a carrier base placed between upper and lower turn tables to which polishing pads are attached, the carrier base having a holding hole formed therein, the holding hole capable of holding the wafer sandwiched between the upper and lower turn tables at the time of polishing; and a ring-shaped resin ring disposed along an inner circumference of the holding hole of the carrier base, the resin ring for protecting the chamfered portion by contacting the chamfered portion of the held wafer, wherein the resin ring has a concave groove on an inner circumference thereof, the concave groove having an upper tapered surface and a lower tapered surface, and the wafer is capable of being held at the chamfered portion by the upper and lower tapered surfaces of the concave groove, the upper and lower tapered surfaces of the concave groove and the chamfered portion of the wafer forming a cross-sectional point contact, wherein an angle β of the upper and lower tapered surfaces of the concave groove with respect to the upper and lower main surfaces of the resin ring, respectively, satisfies an expression θ<β≦θ+7°, wherein θ represents a chamfering angle of the wafer to be held.