Electrically conductive transparent laminated window
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.
Claims11
A transparent, colorless article comprising in combination:
- a. a transparent substrate,
- b. a first transparent layer having a thickness of from 200 to 500 Angstroms affixed to said substrate deposited as TiO.sub.x, where x is a value greater than 1.3 but less than 1.7,
- c. a second transparent layer of metal selected from the class consisting of silver and gold having a thickness of from 60 to 250 Angstroms overlying and affixed to said first transparent layer, and having a sheet resistance of less than 10 ohms per square,
- d. a third transparent layer having a thickness of from 200 to 500 Angstroms overlying and affixed to said second transparent layer deposited as TiO.sub.x, where x is a value greater than 1.3 but less than 1.7;
- said coated article havng a luminous transmittance of at least 80 percent.
A transparent laminated window having a luminous transmittance of about 70 percent or more, comprising in combination:
- a. a rigid transparent sheet,
- b. a flexible plastic layer having a transparent, clear, electrically conductive coating thereon, said coating comprising:
- i. a first transparent layer having a thickness of from 200 to 500 Angstroms on said flexible plastic deposited as TiO.sub.x, where x is a value greater than 1.3 but less than 1.7,
- ii. a second transparent layer of metal selected from the class consisting of silver and gold having a thickness of from 60 to 250 Angstroms and a sheet resistance of less than 10 ohms per square on said first layer,
- iii. a third transparent layer having a thickness of from 200 to 500 Angstroms on said second layer deposited as TiO.sub.x, where x is a value greater than 1.3 but less than 1.7.
Dependencies are inferred from the claim text.