Patent ID: 8063545
Filing Date: 2011-11-22
Classification: B24B,H03H

Abstract:
1. A wafer polishing apparatus for polishing two head and tail faces of a wafer while supplying a polishing solution to adjust a thickness of the wafer to a predetermined thickness, wherein the wafer is in a shape of a plate substantially in an angular shape used as a raw material of a piezoelectric vibrator; wherein all of corner portions of the substantially angular shape are formed in a shape of a curved face by chamfering providing curvatures, and the corner portions substantially in the shape of the curved face includes at least a first curved face portion and a second curved face portion chamfered by the curvatures different from each other or the same curvature; and wherein a reference face of a crystal orientation of the raw material is specified by the first curved face portion or the second curved face portion, the wafer polishing apparatus comprising: