Patent ID: 8029339
Filing Date: 2011-10-04
Classification: B24B

Abstract:
1. A workpiece double-disc grinding apparatus comprising: a workpiece holder that supports a thin-plate-like workpiece from an outer peripheral side along a radial direction and is able to rotate; a pair of static pressure support members that are positioned on two opposing sides of the workpiece holder and support the workpiece holder from the two opposing sides along an axial direction of the rotation thereof in a contactless manner by a static pressure of a fluid supplied by the pair of static pressure support members; and a pair of grinding stones that simultaneously grind two surfaces of the supported workpiece, wherein an interval between the workpiece holder and each of the static pressure support members is not greater than 50 μm, and each of the static pressure support members support the workpiece holder based on the static pressure of the fluid that is not lower than 0.3 MPa.