Patent ID: 6973390

Claim:
A method for analyzing wafer yield against uses of a semiconductor tool, comprising the steps of: providing at least yield data comprising at least a wafer identity number, wafer yield, and a serial number of the semiconductor tool; generating a box plot chart comprising at least a tendency line and analyzing correlation between the semiconductor equipment and the wafer yield according to the tendency line; generating a P-value statistical chart comprising at least one P-value and analyzing correlation between the semiconductor equipment and the wafer yield according to the P-value; generating a ratio limit chart comprising a high yield group and a low yield group; dividing the high yield group into the low yield group to generate a deviant quotient; providing a deviation limit, and analyzing correlation between the semiconductor equipment and the wafer yield according to comparison of the deviant quotient with a deviation limit; and adjusting the semiconductor equipment according to the box plot chart, the P-value statistical chart, and the ratio limit chart.