Patent ID: 8372663

Claim:
A good chip classifying method of a wafer, comprising: a defective chip dividing step of, based on wafer test results whether each of chips arranged in a matrix in an X direction and a Y direction on the wafer is good or defective, dividing the defective chips into defective groups so that the defective chips contiguous to each other are placed into the same defective group by checking the continuity of the defective chips in four directions of the X axis and the Y axis or eight directions consisting of the four directions and an additional four directions each inclined 45 degrees with respect to the X axis and the Y axis; and a classifying step of treating at least good chips as judge target chips and, with respect to each of the defective groups, classifying each of the judge target chips to have any of plural chip indexes based on the number of directions in which any defective chip in a target defective group is disposed in the four directions of the X axis and the Y axis or in the eight directions consisting of the four directions and the additional four directions each inclined 45 degrees with respect to the X axis and the Y axis.