Patent ID: 7345254

Claim:
A die sorting apparatus for a wafer, comprising: a map file for storing records of testing information based upon testing performed on individual dice in the wafer and relative logical positions of the dice; an image capturing device operative to acquire an image of at least a portion of the wafer comprising at least two individual dice, wherein the image shows physical coordinates of the at least two individual dice after the dice have been singulated; a processing device operative to associate the logical position of each of the individual dice from the map file with the physical coordinates of each of the at least two individual dice as calculated from the image of the wafer and to generate a data file based on the association of the logical position and the physical coordinates of each of the dice, the data file storing the actual physical coordinates and the relative logical positions of each of the dice comprised in the at least the portion of the wafer; and a die pick-up device operative to selectively pick up dice that meet predetermined criteria according to the testing information from their actual physical positions as contained in the data file generated by the processing device.