Patent ID: 7031509

Claim:
A method of correcting inclination of ICs on a semiconductor wafer, comprising: loading the semiconductor wafer on a wafer turning member; recognizing a first detection point and a second detection point on the semiconductor wafer by moving an image pickup camera in an X direction and a Y direction orthogonal to each other; and correcting an inclination of all the ICs on the semiconductor wafer with respect to an X-axis and a Y-axis by rotating the semiconductor wafer in a circumferential direction thereof using the wafer turning member based on a result of said recognizing of the first detection point and the second detection point; wherein, when the first detection point deviates within a deviation area beyond a view field of the image pickup camera, said recognizing comprises detecting the first detection point by moving the view field of the image pickup camera in a serpentine manner in the X direction and the Y direction within the deviation area starting from a first point, the first point being one of four corners of the deviation area.