Annealed low emissivity coating
First Claim
Patent Images
1. A method of increasing the shear resistance of a sputter coating deposited on a soda-lime-silica glass substrate, the glass substrate having a strain point comprising the steps of:
- sputter coating onto the glass substrate successive layers of an antireflective metal oxide, an infrared reflective metal, a metal primer, an antireflective metal oxide, an infrared reflective metal, a metal primer, an antireflective metal oxide and a protective overcoat, andheating the coated glass substrate to a temperature not exceeding the strain point of the glass substrate and between about 600 and 1000°
F. (about 315 to 538°
C.) for a time period within the range of 1 to 8 minutes to increase the shear resistance of the coating.
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Abstract
A low emissivity coated article comprising a glass substrate and a coating comprising a layer of infrared reflective metal between layers of antireflective metal oxide is heated to a temperature below the strain point of the substrate for a sufficient time to anneal the coating without affecting the substrate to improve the chemical and mechanical durability of the coating.
42 Citations
16 Claims
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1. A method of increasing the shear resistance of a sputter coating deposited on a soda-lime-silica glass substrate, the glass substrate having a strain point comprising the steps of:
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sputter coating onto the glass substrate successive layers of an antireflective metal oxide, an infrared reflective metal, a metal primer, an antireflective metal oxide, an infrared reflective metal, a metal primer, an antireflective metal oxide and a protective overcoat, and heating the coated glass substrate to a temperature not exceeding the strain point of the glass substrate and between about 600 and 1000°
F. (about 315 to 538°
C.) for a time period within the range of 1 to 8 minutes to increase the shear resistance of the coating. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of increasing the shear resistance of a sputter coating deposited on a soda-lime-silica glass substrate, the glass substrate having a strain point comprising the steps of:
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sputter coating onto the glass substrate successive layers of an antireflective metal oxide, an infrared reflective metal and a metal primer to provide a coated article defined as coated glass; heating the coated glass to a temperature not exceeding the strain point of the substrate and between about 600 and 1000°
F. (about 315 to 538°
C.) for a time period in the range of about 1 to 8 minutes to increase the shear resistance of the coating on the coated glass, andsputter coating over the metal primer of the coated glass successive layers of an antireflective metal oxide, an infrared reflective metal, a metal primer, an antireflective metal oxide and a protective overcoat. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification