An index-matching coating is applied directly to a low-emissivity ("lowE") thin-film coating. Nodules growing from a site in the lowE coating are removed to avoid propagation of defects through the layers of the index-matching coating. A tempering step in an oxygen-containing atmosphere produces compressive...http://www.google.com/patents/US20040134233?utm_source=gb-gplus-sharePatent US20040134233 - Method of applying barrier coatings to glass panels
