Patent ID: 6388436
Filing Date: 2002-05-14
Classification: H01L,Y10S

Abstract:
An apparatus for calibrating the position of a support platform of a wafer cassette holder with respect to a robot blade carrying a wafer, said apparatus comprising:a housing including an open front portion to permit extending the robot blade into said housing when said apparatus is placed on the support platform, said housing further including; a detecting means for detecting the wafer, a measuring means for measuring a spacing between said detecting means and the wafer, and a display panel coupled to said detecting means and to said measuring means, including a display means for displaying spacing information which indicates to a user when the spacing between said detecting means and the wafer reaches a predetermined spacing value; such that, when said apparatus is placed on the support platform with the robot blade holding the wafer positioned within said housing, calibration is carried out in accordance with the spacing information by adjusting the position of the support platform so as to reach a desired spacing value.