Comment sts SNF 2008-11-23 18:35:05: Black spot near centre of platen

jperez at snf.stanford.edu jperez at snf.stanford.edu
Mon Dec 1 11:53:17 PST 2008


I took a look at the platen after many cleans. Once cleaned 
images disappear, but once you start depositing shadows 
come back (wafer images).




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