Patent ID: 6535288
Filing Date: 2003-03-18
Classification: C23C,G01N,H01L

Abstract:
A system operable to form a thin film on a substrate, comprising:a thin film formation process chamber; a moving substrate further comprising an optical indicia and a periodic analysis structure, wherein the optical indicia and the periodic analysis structure have a predetermined spatial relationship; a signaling system configured to determine a position of the optical indicia and provide an indication thereof; one or more radiation sources configured to provide radiation that is directed at a surface of the moving substrate; one or more radiation detectors configured to measure one or more properties of radiation scattered from the substrate and generate data relating to the one or more measured radiation properties; and a processor configured to receive the data relating to the one or more measured radiation properties at a timing which is a function of the indication provided by the signaling system, and to provide feedback control, based on the data, over one or more process conditions affecting a formation of the thin film within the process chamber.