Patent ID: 6357330
Filing Date: 2002-03-19
Classification: B23D,B28D,Y10T

Abstract:
An apparatus for cutting a wafer which includes:a wafer saw including a stand, a wafer holder on the stand capable of holding a wafer, and a spindle on the stand to which a sawing blade is mountable to saw the wafer, the spindle and the wafer holder being movable relative to one another to saw the wafer in a selected direction; a detector mounted so as to face a surface of the wafer, the detector detecting a feature at a surface of a wafer when held by the wafer holder, the detector and the wafer holder being movable relative to one another in the selected direction to allow the detector to detect variability of the feature along the surface of the wafer in the selected direction; and a control unit which utilizes the variable to vary sawing of the wafer by the blade in the selected direction as a function of variability in the selected direction.