Chemical vapor deposition of tin oxide on float glass in the tin bath
AssigneePPG Industries, Inc.
InventorVern A. Henery
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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.
Claims14
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.
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 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.
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 metal-containing coating reactant in vapor form and oxygen, wherein the temperature of the glass surface is in the range of 1150.degree. to 1250.degree. F. (610.degree. to 677.degree. C.);
- and
- d. 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.
Dependencies are inferred from the claim text.