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PROCESS FOR MAKING OF GLASS ARTICLES WITH OPTICAL AND EASY-TO-CLEAN COATINGS

  • US 20140113083A1
  • Filed: 11/30/2012
  • Published: 04/24/2014
  • Est. Priority Date: 11/30/2011
  • Status: Abandoned Application
First Claim
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1. A process for making glass articles having an optical coating and an easy-to-clean (ETC) coating on the optical coating, the process comprising:

  • providing a coating apparatus having at least one coating chamber for deposition of an optical coating and an ETC coating;

    providing within the at least one coating chamber, optical coating source materials and ETC coating source materials, wherein when a plurality of optical coating source materials are deposited, each of the plurality of optical coating source materials is provided in a separate optical coating source container;

    providing a substrate to be coated, the substrate having a length, a width and a thickness and at least one edge between surfaces of the substrate defined by the length and width;

    evacuating the at least one coating chamber to a pressure of less than or equal to 10

    4
    Torr;

    depositing the optical coating source materials on the substrate to form an optical coating;

    depositing the ETC coating source materials on the optical coating to form an ETC coating;

    removing the substrate from the at least one coating chamber to provide a glass article having the optical coating and the ETC coating; and

    post-treating the glass article at a temperature of from about 60°

    C. to about 200°

    C. for a period of time from about 5 minutes to about 60 minutes in an air or humid environment having a relative humidity RH of 40%<

    RH<

    100% to facilitate cross-linking between ETC molecules;

    wherein the optical coating is a multilayer coating comprising alternating layers of a high refractive index material H having a refractive index greater than 1.7 and less than or equal to 3.0, and one of (i) a low refractive index material L having a refractive index greater than or equal to 1.3 and less than or equal to 1.6 or (ii) a medium refractive index material M having a refractive index greater than 1.6 and less than or equal to 1.7, laid down in the order H(L or M) or (L or M)H, wherein each H(L or M) or (L or M)H pair of layers is a coating period; and

    wherein a thickness of an H layer and an (L or M) layer, independent of each other, in each coating period is from about 5 nm to about 200 nm.

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