Heat temperable transparent glass article
First Claim
1. A heat-resistant, temperable glass article comprising a glass substrate and a transparent film stack deposited upon the substrate, said film stack comprising, from the glass substrate outwardly, an infrared reflective metallic film, a protective barrier film of niobium metal deposited directly on the infrared reflective film at a thickness up to 25 Å
- such that a thin protective film of niobium remains after heat-tempering of the glass article, a film of titanium nitride, and a film of a transparent nitride.
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Abstract
A heat-resistant transparent glass article is formed with a film stack deposited on a glass substrate, the film stack comprising one or more infrared reflective films each bearing on its surface facing away from the substrate a barrier film of niobium metal having a thickness of up to 25 Å and preferably in the range of about 7 Å to 20 Å. A barrier film of niobium metal or, preferably, a metal oxide may be formed on the other surface (facing the substrate) of each infrared reflective film. Metal nitride films such as silicon nitride may be employed between neighboring infrared reflective films, and as an outer protective film.
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Citations
16 Claims
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1. A heat-resistant, temperable glass article comprising a glass substrate and a transparent film stack deposited upon the substrate, said film stack comprising, from the glass substrate outwardly, an infrared reflective metallic film, a protective barrier film of niobium metal deposited directly on the infrared reflective film at a thickness up to 25 Å
- such that a thin protective film of niobium remains after heat-tempering of the glass article, a film of titanium nitride, and a film of a transparent nitride.
- View Dependent Claims (2, 3, 4)
- 5. A heat-resistant, temperable glass article comprising a glass substrate and a film stack deposited upon the substrate, said film stack comprising, from the glass substrate outwardly, a metal oxide barrier film, an infrared reflective silver-containing metallic film, a barrier film of niobium metal, a film of titanium nitride, and a film of a transparent nitride, the metal oxide and niobium barrier films being contiguous to the infrared reflective silver film, and the niobium barrier film having a thickness in the range of 7 to 20 Å
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11. A transparent heat-resistant glass article comprising a glass substrate and a transparent film stack deposited upon the substrate, said film stack comprising a plurality of transparent silicon nitride films, an infrared reflective film positioned between neighboring transparent nitride films, a film of niobium metal 7-20 Å
- in thickness positioned on the surface of each infrared reflective film facing away from the substrate, a metal oxide film positioned between each transparent silicon nitride film and each infrared reflective film, and a film of titanium nitride between the silicon nitride film furthest from the substrate and the next adjacent niobium barrier film.
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12. A transparent heat-resistant glass article comprising a glass substrate and a transparent film stack deposited upon the substrate, said film stack comprising, from the glass substrate outwardly, a first Si3 N4 film 100-400 Å
- in thickness, a second Si3 N4 film 100-800 Å
in thickness, and a third Si3 N4 film 50-300 Å
in thickness, an infrared reflective silver film between the first and second Si3 N4 films and between the second and third Si3 N4 films, a film of niobium metal 7-20 Å
in thickness positioned on the surface of each infrared reflective film facing away from the glass substrate, and a film of titanium nitride between the silicon nitride film furthest from the substrate and the next adjacent niobium barrier film. - View Dependent Claims (13)
- in thickness, a second Si3 N4 film 100-800 Å
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14. A transparent heat-resistant glass article comprising a glass substrate and a transparent film stack deposited upon the substrate, said film stack comprising, from the glass substrate outwardly, a transparent silicon nitride film having a thickness of from 125 Å
- to 500 Å
, a first protective film of niobium metal 7 to 20 Å
in thickness, a transparent infrared reflective silver film, a second protective film of niobium metal 7 to 20 Å
in thickness, a transparent titanium nitride film, and a transparent silicon nitride film having a thickness of from 350 Å
to 600 Å
.
- to 500 Å
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15. A transparent heat-resistant glass article comprising a glass substrate and a transparent film stack deposited upon the substrate, said film stack comprising a film of silver contiguous to and sandwiched between protective niobium metal films that are 7 Å
- to 20 Å
in thickness;
on each side of said sandwich structure, a transparent film capable of liberating nitrogen upon being heated to glass tempering temperatures; and
a titanium nitride film disposed between one of said protective niobium metal films and the next adjacent transparent film capable of liberating nitrogen.
- to 20 Å
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16. A transparent heat-resistant glass article comprising a glass substrate and a transparent film stack deposited upon the substrate, said film stack, from the glass substrate outwardly, including a film sequence comprising a metal oxide barrier film, a transparent infrared reflective silver film, a niobium metal barrier film 7 Å
- to 20 Å
in thickness, a metal oxide film, and a film of transparent silicon nitride, and a repeat of said film sequence, and a film of titanium nitride being disposed between the silicon nitride film furthest from the substrate and the next adjacent metal oxide film.
- to 20 Å
Specification