Chemical vapor deposition of tin oxide on float glass in the tin bath
First Claim
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1. A method for depositing a low emissivity metal oxide coating comprising the steps of:
- a. supporting a glass substrate on a molten metal bath;
b. maintaining a nonoxidizing atmosphere over the molten metal bath and glass substrate;
c. contacting said glass substrate on the surface which is not supported on said molten metal bath with a vapor mixture comprising a metal-containing coating reactant in vapor form and oxygen; and
d. thermally reacting said coating reactant vapor in the presence of said oxygen to deposit a metal oxide film on said glass surface while maintaining temperature uniformity of said glass substrate by contact with said molten metal bath in said nonoxidizing atmosphere.
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Abstract
A method is disclosed for producing a low emissivity metal oxide film on a glass surface within a nonoxidizing atmosphere inside a float bath by applying a metal-containing coating reactant in vapor form in the pressure of oxygen to the top surface of a float glass ribbon while the bottom surface is maintained in contact with a molten metal bath in a nonoxidizing atmosphere at a temperature sufficient to thermally react said reactant to form a metal oxide film on the glass surface.
109 Citations
14 Claims
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1. A method for depositing a low emissivity metal oxide coating comprising the steps of:
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a. supporting a glass substrate on a molten metal bath; b. maintaining a nonoxidizing atmosphere over the molten metal bath and glass substrate; c. contacting said glass substrate on the surface which is not supported on said molten metal bath with a vapor mixture comprising a metal-containing coating reactant in vapor form and oxygen; and d. thermally reacting said coating reactant vapor in the presence of said oxygen to deposit a metal oxide film on said glass surface while maintaining temperature uniformity of said glass substrate by contact with said molten metal bath in said nonoxidizing atmosphere. - View Dependent Claims (2, 3, 4, 5, 10, 11, 12, 13, 14)
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6. A method for depositing a low emissivity metal oxide coating comprising the steps of:
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a. supporting a glass substrate on a molten metal bath; b. maintaining a nonoxidizing atmosphere over the molten metal bath and glass substrate; c. contacting said glass substrate on the surface which is not supported on said molten metal bath with an organotin compound coating reactant in vapor form and oxygen; and d. thermally reacting said coating reactant in the presence of said oxygen to deposit a tin oxide film on said glass surface while maintaining temperature uniformity of said glass substrate by contact with said molten metal bath in said nonoxidizing atmosphere. - View Dependent Claims (7)
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8. A method for depositing a low emissivity metal oxide coating comprising the steps of:
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a. supporting a glass substrate on a molten metal bath; b. maintaining a nonoxidizing atmosphere over the molten metal bath and glass substrate; c. contacting said glass substrate on the surface which is not supported on said molten metal bath with a metal-containing coating reactant in vapor form and oxygen, wherein the temperature of the glass surface is in the range of 1150°
to 1250°
F. (610°
to 677°
C.); andd. thermally reacting said coating reactant in the presence of said oxygen to deposit a metal oxide film on said glass surface while maintaining temperature uniformity of said glass substrate by contact with said molten metal bath in said nonoxidizing atmosphere. - View Dependent Claims (9)
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Specification