Patent ID: 9704762
Date: 2017-07-11
CPC Classifications: C23C,G01N,H01L

Claim:
1. A processing device comprising: a transfer chamber; one or more process chambers in connection with the transfer chamber, the process chambers each comprising a processing entrance proximate the transfer chamber; a loadlock chamber comprising a loadlock entrance and a loadlock exit, the loadlock entrance having an upper wall, a lower wall, a first sidewall and a second sidewall; a first optical device and a second optical device positioned in a factory interface outside of and above the upper wall of the loadlock entrance, the first optical device positioned to view a first lateral edge of a substrate and the second optical device positioned to view a second lateral edge of the substrate; and a radiation source positioned in the factory interface between the first optical device and the second optical device and outside of and above the upper wall of the loadlock entrance, the radiation source positioned to deliver radiation at the first lateral edge and the second lateral edge.