Patent ID: 7835007
Filing Date: 2010-11-16
Classification: G01N,H01L

Abstract:
1. An apparatus for detecting a film in an electronic device in an electronic device processing tool comprising: a mounting member adapted to couple the apparatus to a view port of the electronic device processing tool; an optical energy source disposed within the mounting member and adapted to illuminate the electronic device within the electronic device processing tool with a multiplicity of optical wavelengths which are simultaneous, sequenced, or selectively enabled; an optical system adapted to pass wavelengths indicative of a presence of the film; an optical detector positioned to receive optical energy reflected from the substrate and passing through the optical system adapted to detect a presence or absence of the film; an additional optical energy source; and an additional optical detector disposed to receive optical energy reflected from the substrate, wherein the additional optical energy source and optical detector are adapted to detect a presence or absence of the substrate within the electronic device processing tool.