Multilayer heat processable vacuum coatings with metallic properties
First Claim
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1. A method of making a tempered coated article having a metallic appearance comprising the steps of:
- depositing on a surface of a glass substrate a stabilizing metallic film selected from the group consisting of titanium, zirconium, tantalum, chromium, niobium, nickel-chromium alloys and aluminum nitride;
depositing a metal compound film on the stabilizing film;
depositing a protective layer comprising a silicon or silicon alloy dielectric over the metal compound film to prevent oxidation of the metal compound film upon heating; and
heating the glass substrate having the stabilizing metallic film, the metal compound film and the protective layer defined as a coated substrate to a temperature sufficient to temper the glass substrate, to increase the transmission of the coated substrate in the wavelength range of 400-800 nanometers, to decrease solar transmission of the coated substrate in the wavelength range of 800 to 2100 nanometers and to oxidize the stabilizing metallic film.
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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.
149 Citations
26 Claims
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1. A method of making a tempered coated article having a metallic appearance comprising the steps of:
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depositing on a surface of a glass substrate a stabilizing metallic film selected from the group consisting of titanium, zirconium, tantalum, chromium, niobium, nickel-chromium alloys and aluminum nitride; depositing a metal compound film on the stabilizing film; depositing a protective layer comprising a silicon or silicon alloy dielectric over the metal compound film to prevent oxidation of the metal compound film upon heating; and heating the glass substrate having the stabilizing metallic film, the metal compound film and the protective layer defined as a coated substrate to a temperature sufficient to temper the glass substrate, to increase the transmission of the coated substrate in the wavelength range of 400-800 nanometers, to decrease solar transmission of the coated substrate in the wavelength range of 800 to 2100 nanometers and to oxidize the stabilizing metallic film. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 24, 25, 26)
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- 22. The method according to claim 22, wherein said metal compound film is selected from the group consisting of metal borides, metal carbides and metal oxynitrides.
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