The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 2020
Filed:
May. 09, 2018
Applied Materials, Inc., Santa Clara, CA (US);
Ramesh Gopalan, Fremont, CA (US);
Tom K. Cho, Los Altos, CA (US);
George Alajajian, Fremont, CA (US);
Michael J. Mark, San Jose, CA (US);
Applied Materials, Inc., Santa Clara, CA (US);
Abstract
An apparatus includes a reactive species source, a spectral measurement volume, a light source to emit a light beam into the spectral measurement volume, a spectrometer to receive the light beam from the spectral measurement volume. The apparatus includes an a controller configured to, when a reactive species is present in the spectral measurement volume, control the light source to emit the light beam into the spectral measurement volume and the spectrometer to determine an environment spectrum using the light beam, and when the reactive species is not present in the spectral measurement volume, control the light source to emit the light beam into the spectral measurement volume and the spectrometer to determine a baseline spectrum using the light beam, calculate a net spectrum based on a difference between the environment spectrum and the baseline spectrum, and estimate a concentration of the reactive species based on the net spectrum.