Electrically conductive coating
AssigneePPG Industries, Inc.
InventorFrank H. Gillery
Life of this patent
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Abstract
An optically clear, electrically conductive, transparent coating on a substrate and a method of coating are disclosed. The coating comprises a first transparent layer deposited as TiO.sub.x on the substrate, where x preferably has a value within the range of 1.3 to 1.7, a layer of silver or gold deposited on the first layer, and a third transparent layer deposited as TiO.sub.x on the second layer, where x preferably has a value within the range of 1.3 to 1.7. The coating is deposited under vacuum in a partial pressure of oxygen on a rigid transparent substrate such as glass or a flexible plastic substrate and the resultant coated substrate used in electrically heated windows.
Claims8
A method of making a coated article comprising:
- a. vacuum depositing in a partial pressure of oxygen titanium oxide having the form TiO.sub.x where x is from 1.3 to 1.7 on a substrate to form a transparent film having a thickness of from 200 to 500 Angstroms;
- b. vacuum depositing silver or gold on the previously deposited TiO.sub.x film at a rate sufficiently fast to form a transparent continuous metal film having a thickness of from 60 to 250 Angstroms and having a sheet resistance of less than 10 ohms per square, and
- c. vacuum depositing in a partial pressure of oxygen titanium oxide having the form TiO.sub.x where x is from 1.3 to 1.7 on the previously deposited metal film to form a transparent film having a thickness of from 200 to 500 Angstroms.
Dependencies are inferred from the claim text.