The Thickness of the wafer at a given sensor pair results from the difference of Total Distance minus distance at bottom sensor minus distance at top sensor.
\(\operatorname{Thk}(i)=\text { TotDist }- \text { Bottom }(i)-T o p(i)\)
\(LThk \quad=\quad Local\:thickness\:values\:on\:every\:sensor\:pair \)
\(CntThk \quad= Thickness\:value\:in\:the\:middle\)
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Headquarters
E+H Metrology GmbH
Griesbachstraße 12
Benzstraße 5-9
76185 Karlsruhe
+49-721-83118-0
info(at)eh-metrology.com