An iterative cutting procedure for determining the optimal wafer exposure pattern

Abstract

Conventionally, people focus on defect reduction to improve yield rate. Little research has been done to deal with the problem of optimizing wafer exposure patterns. This paper develops a computer-based procedure to maximize the number of dies possibly produced from a wafer. A program has been developed and implemented in a 6-in wafer fabrication factory in Taiwan. The results validate the practical viability of the proposed procedure.