Patent ID: 6354909
Filing Date: 2002-03-12
Classification: B23D,B24B,B28D

Abstract:
A method for dicing a substrate using a programmable dicing saw having a processor operable for movement of a spindle carrying a dicing blade for movement relative to a work surface carrying a substrate, wherein movement of a dicing blade across the work surface is controlled by movements within an orthogonal coordinate system having its center at a center location of the work surface, the method comprising the steps of:aligning the dicing blade with a first edge of the substrate for determining a substrate first edge location; aligning the dicing blade with a second edge of the substrate for determining a substrate second edge location, wherein the first edge laterally opposes the second edge and the rotational axis of the dicing blade is perpendicular to first and second blade paths along the first and second edges; rotating the substrate ninety degrees about an axis perpendicular thereto; aligning the dicing blade with a third edge of the rotated substrate for determining a substrate third edge location, wherein a third blade path along the third edge is perpendicular to the first blade path along the first edge; aligning the dicing blade with a fourth edge of the substrate for determining a substrate fourth edge location, wherein the third edge laterally opposes the fourth edge; entering edge location data representative of the substrate first, second, third, and fourth edge locations into the processor for determining a center of the substrate; determining a distance between the center of the substrate and the center of the work surface for providing a compensating command to the programmable dicing saw; positioning the dicing blade over the center of the substrate; moving the spindle relative to the center of the substrate for positioning the dicing blade based on the compensating command; aligning the dicing blade for making a cut into the substrate along the first blade path; dicing the substrate along the first blade path; aligning the dicing blade for making a cut into the substrate along the second blade path; dicing the substrate along the second blade path.