Patent ID: 6905571

Claim:
A wafer polishing apparatus comprising: an abrasive pad; a platen for holding and rotating said abrasive pad; a head for holding a wafer and rotating the wafer while pressing the wafer against the abrasive pad; and conditioning mechanism for honing the abrasive pad including a conditioner for honing the pad in contact therewith, a conditioner driving unit for holding and rotating the conditioner, an arm for holding the conditioner driving unit, and a plurality of detectors each detecting a force in the rotational direction of the platen and a force in the radial direction orthogonal to the rotational direction of the platen among forces applied to the conditioner driving unit, wherein said detectors each includes a rotational directional pressure detector located between one side along the rotational direction of the platen, of the conditioner driving unit and the holding portion of the arm, and two radial directional pressure detectors located between the both sides along the radial direction of the platen, of the conditioner driving unit and the holding portion of the arm, and a fixing jig for holding the conditioner driving unit is provided between the other side along the rotational direction of the platen, of the conditioner driving unit and the holding portion of the arm.