Patent ID: 8786841
Filing Date: 2014-07-22
Classification: H01L

Abstract:
1. A method for determining temperature of a semiconductor film having a measurable optical absorption edge deposited on an optically transparent substrate material having no measurable optical absorption edge, said method comprising the steps of: a) providing an optically transparent substrate of material having no measurable optical absorption edge, b) depositing a film of a semiconductor material having a measurable optical absorption edge and a measurable thickness on the substrate, c) interacting light with the film deposited on the substrate to produce diffusely scattered light, d) collecting the diffusely scattered light from the film, e) producing a spectra indicating optical absorption of the film based on the diffusely scattered light from the film, f) determining a thickness of the film, g) determining the optical absorption edge wavelength of the film based on the spectra, and h) determining a temperature of the film at the film thickness as a function of the film thickness and the optical absorption edge wavelength.