Temperable high shading performance coatings
First Claim
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1. A transparent substrate bearing a temperable high shading performance low-emissivity coating comprising, in sequence outwardly:
- (a) a first infrared-reflective film;
(b) a first high absorption blocker layer deposited directly over the first infrared-reflective film, the first high absorption blocker layer being deposited as essentially pure niobium;
(c) a middle coat comprising a plurality of transparent dielectric films beginning with a nitride film deposited directly over the first high absorption blocker layer and ending with an oxide film directly beneath a second infrared-reflective film;
(d) the second infrared-reflective film;
(e) a second high absorption blocker layer deposited directly over the second infrared-reflective film, the second high absorption blocker layer being deposited as essentially pure niobium; and
(f) an outer coat comprising a transparent dielectric nitride film deposited directly over the second high absorption blocker layer;
wherein the first and second high absorption blocker layers have a combined thickness of greater than 50 angstroms.
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Abstract
The invention provides temperable high shading performance low-emissivity coatings. The invention also provides insulating glass units, monolithic panes, and other substrates bearing such coatings. Further, the invention provides methods of producing coated substrates by depositing coatings of this nature.
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Citations
32 Claims
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1. A transparent substrate bearing a temperable high shading performance low-emissivity coating comprising, in sequence outwardly:
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(a) a first infrared-reflective film; (b) a first high absorption blocker layer deposited directly over the first infrared-reflective film, the first high absorption blocker layer being deposited as essentially pure niobium; (c) a middle coat comprising a plurality of transparent dielectric films beginning with a nitride film deposited directly over the first high absorption blocker layer and ending with an oxide film directly beneath a second infrared-reflective film; (d) the second infrared-reflective film; (e) a second high absorption blocker layer deposited directly over the second infrared-reflective film, the second high absorption blocker layer being deposited as essentially pure niobium; and (f) an outer coat comprising a transparent dielectric nitride film deposited directly over the second high absorption blocker layer; wherein the first and second high absorption blocker layers have a combined thickness of greater than 50 angstroms. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An insulating glass unit comprising first and second panes held in a spaced-apart configuration, the panes having confronting inner surfaces oriented toward a between-pane space and opposed outer surfaces oriented away from the between-pane space, one of said inner surfaces bearing a tempered high shading performance low-emissivity coating comprising first and second infrared-reflective films and first and second high absorption blocker layers positioned respectively directly over the first and second infrared-reflective films, the first and second high absorption blocker layers having a combined thickness of greater than 50 Å
- and being deposited as essentially pure niobium, said coating including a middle coat comprising a plurality of transparent dielectric films beginning with a nitride film deposited directly over the first high absorption blocker layer and ending with an oxide film directly beneath the second infrared-reflective film, the insulating glass unit having a total visible transmittance of less than about 0.45.
- View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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24. An insulating glass unit comprising first and second panes held in a spaced-apart configuration, the panes having confronting inner surfaces oriented toward a between-pane space and opposed outer surfaces oriented away from the between-pane space, one of said inner surfaces bearing a tempered high shading performance low-emissivity coating comprising first and second infrared-reflective films and first and second high absorption blocker layers positioned respectively directly over the first and second infrared-reflective films, the first and second high absorption blocker layers having a combined thickness of greater than 50 Å
- and being deposited as essentially pure niobium, said coating including a middle coat comprising a plurality of transparent dielectric films beginning with a nitride film deposited directly over the first high absorption blocker layer and ending with an oxide film directly beneath the second infrared-reflective film, the insulating glass unit having a solar heat gain coefficient of less than about 0.4.
- View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32)
Specification