Multilayer heat processable vacuum coatings with metallic properties
AssigneePPG Industries Ohio, Inc.
InventorsJames J. Finley, Mehran Arbab, Thomas J. Waynar
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Abstract
A temperable coated article with metallic properties is prepared by coating a glass substrate with a metal-containing film such as titanium nitride, which ordinarily oxidizes at high temperature, overcoating with a protective layer of a silicon compound which forms a durable layer and prevents oxidation of the underlying metal-containing film and undercoating with a stabilizing metal-containing layer. The coated article can be tempered without losing its metallic properties to oxidation.
Claims20
A temperable, metallic coated article comprising:
- a. a transparent glass substrate;
- b. a stabilizing layer selected from the group consisting of silicon, titanium, zirconium, tantalum, chromium, niobium, silicon alloys, nickel-chromium alloys and aluminum nitride;
- c. a metal compound film with metallic properties;
- and
- d. a protective layer which prevents oxidation of the metal compound film upon heating.
A method of making a tempered metallic appearing coated article comprising the steps of:
- a. depositing on a surface of a glass substrate a stabilizing film selected from the group consisting of silicon, titanium, zirconium, tantalum, chromium, niobium, silicon alloys, nickel-chromium alloys and aluminum nitride;
- b. depositing a metal compound film with metallic properties on the stabilizing film;
- c. depositing a protective layer comprising a silicon or silicon alloy dielectric which prevents oxidation of the underlying metal compound film upon heating;
- and
- d. heating the glass substrate on which said films and layer are deposited to a temperature sufficient to temper the glass.
Dependencies are inferred from the claim text.