Implementation of a wafer positioning system
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This study implements a system for determining the precise location of a moving wafer in a process chamber. An array of optical sensors positioned along an axis transverse to the path of a moving wafer is employed in this wafer positioning system. A computer program for wafer center calculation is developed based on the time dependent signals from the optical sensing module. The developed computer program has a human machine interface, and estimates the center position as well as the moving direction of the wafer.
[1] 슈지 아키야마,et al. Wafer positioning apparatus , 2009 .