Patent ID: 11875979
Assignee: SOLERAS ADVANCED COATINGS BV
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C | IPC C  H

Claim 10:
11. A method for controlling properties of a single layer or multiple layer stack being applied on a blank or coated substrate by means of a vacuum coating process controlled by a plurality of process controllers, the method comprising:
initiating the coating process of the single layer or multiple layer stack, by driving the plurality of process controllers,
measuring measurement signals in a plurality of locations spatially distributed over the coated substrate, thus determining at least one measurement signal at each of the measurement locations, the measuring being by at least two distinct measurement techniques, wherein a first measurement technique is applied simultaneously to a plurality of locations, and a second measurement technique is applied to at least one location, one of the first and second measurement techniques being a spectral transmission measurement,
using the measurement signals and knowledge from a layer model expressing layer parameters as a function of settings and/or variations of at least two of the plurality of process controllers, for determining actual values of at least two different layer properties at the plurality of locations, and/or for determining deviations between the actual layer property values and desired layer property values,
further driving the plurality of process controllers in the coating process based on the determined values and/or deviations between the actual layer property values and the desired layer property values at the plurality of locations and on knowledge from the layer model, such that properties of the single or multiple layer stack being applied lie within predetermined tolerance values.