Patent ID: 9657391
Date: 2017-05-23
CPC Classifications: C23C,G01B,G01N,G02B

Claim:
1. A system for fabricating an optical thin-film device, comprising: a chamber; a material source contained within the chamber; an electrical component to activate the material source; a substrate holder arranged within the chamber to support a plurality of witness samples and a multilayer stack of materials that form the optical thin-film device; a measurement device having an optical source and a detector each in optical communication with the plurality of witness samples, the measurement device being operable to measure and provide an optical property from the plurality of witness samples; and a computational unit communicably coupled to the electrical component and the measurement device, wherein deposition of the material source by the electrical component provides a layer of material to the multilayer stack of materials and to the plurality of witness samples at a deposition rate controlled based on a correction value obtained by the computational unit, and wherein the correction value is based on a weighted average of the optical property from the plurality of witness samples and a computed value provided by the computational unit according to an optical model, the weighted average based on a difference between a plurality of tooling factors associated with a location of each of the plurality of witness samples.