Patent ID: 8903531
Filing Date: 2014-12-02
Classification: B07C

Abstract:
1. A method of sorting laminates, comprising: characterizing first shapes of laminates to determine a warpage calculation from measurements taken of each, wherein the measurements comprise at least one of: assembling the laminates, wherein the assembling comprises layering the laminates one laminate on top of another laminate to derive a first relationship between the assembled laminates, based on the assembled laminates exhibiting warpage exceeding a predefined threshold; characterizing second shapes of the laminates from a reduced number of the measurements to derive a second relationship between the second shapes and yield loss; iteratively analyzing a change in the derived relationships, using a logical regression technique, to determine a least number of the measurements necessary for achieving the yield loss; sorting supplied laminates in accordance with a characterized shape of each, which is obtained from the least number of the measurements taken for each supplied laminate, wherein the sorting comprises the sorting of usable laminates from unusable laminates; and evaluating an accuracy of the sorting, and modifying the analyzing of the change in the derived relationships based on a result of the evaluation.