Patent ID: 8888562

Claim:
A double-side polishing apparatus, comprising: a lower polishing plate having an upper polishing face, on which a polishing pad is adhered; an upper polishing plate being located above the lower polishing plate and capable of moving upward and downward, the upper polishing plate having a lower polishing face, on which a polishing pad is adhered; a carrier being provided between the lower polishing plate and the upper polishing plate, the carrier having a through-hole for holding a work; a plate driving unit for rotating the lower polishing plate and the upper polishing plate about their axes; a carrier driving unit for rotating the carrier; a slurry supply hole being formed in at least one of the polishing plates; and a slurry supply pipe being connected with the slurry supply hole, the slurry supply pipe supplying slurry, which is sent from a slurry supply source, to the polishing pads via the slurry supply hole, wherein the lower polishing plate, the upper polishing plate and the carrier are rotated, with supplying the slurry to the polishing pads, so as to polish both side faces of the work sandwiched between the polishing plates, the double-side polishing apparatus being characterized in, that one end part of the slurry supply hole, which is opened in the polishing face of at least one of the polishing plates, includes a female-tapered face whose inner diameter is gradually increased toward the polishing face, that a pad hole, which corresponds to the slurry supply hole, is formed in the polishing pad covering the slurry supply hole, that an edge of the pad hole is located in the slurry supply hole, that a fixation pipe, in which a flange section facing the female-tapered face is formed at one end part, is fixed in the slurry supply hole, and that the edge of the pad hole is sandwiched and held between the female-tapered face of the slurry supply hole and the flange section of the fixation pipe.