Patent ID: 6066031
Filing Date: 2000-05-23
Classification: B24B

Abstract:
A wafer chamfering method for chamfering a periphery of a wafer which has a circular part, an orientation flat part and orientation flat corner parts, wherein the wafer is supported in such a manner as to rotate and to move in an X-axis direction and a Y-axis direction which are perpendicular to one another in a horizontal plane, a periphery grinding wheel is rotatable about a vertical axis which intersects the Y-axis, said wafer chamfering method comprising the steps of:chamfering the circular part of the wafer by bringing the circular part along the Y-axis into contact with said periphery grinding wheel which is rotating, and by rotating the wafer;chamfering the orientation flat part of the wafer by bringing the orientation flat part along the Y-axis into contact with said periphery grinding wheel which is rotating, and by feeding the wafer in the X-axis direction; andchamfering one of the orientation flat corner parts of the wafer by bringing the one of the orientation flat corner parts into contact with said periphery grinding wheel, which is rotating, and by rotating the wafer and feeding the wafer in the X-axis direction and the Y-axis direction so that the one of the orientation flat corner parts can always be in contact with said periphery grinding wheel.