| US 7,527,832 B2 | ||
| Process for structuring self-cleaning glass surfaces | ||
| George E. Sakoske, Washington, Pa. (US); Martin Baumann, Frankfurt (Germany); and Enos A. Axtell, III, Washington, Pa. (US) | ||
| Assigned to Ferro Corporation, Cleveland, Ohio (US) | ||
| Filed on Apr. 27, 2005, as Appl. No. 11/115,945. | ||
| Prior Publication US 2006/0246297 A1, Nov. 02, 2006 | ||
| Int. Cl. C23C 4/10 (2006.01); C23C 4/12 (2006.01); C23C 4/18 (2006.01) | ||
| U.S. Cl. 427—450 [427/451; 427/452; 427/454; 427/446] | 7 Claims |
| 1. A process for forming a hydrophobic micro-rough outer surface of an inorganic material on a glass substrate, the process
comprising:
providing a glass substrate;
forming a first layer on the glass substrate by plasma spraying particles of inorganic oxide material having an average diameter
greater than 0.2 microns but less than 100 microns using a plasma gas arc flame at a temperature of about 7,000 K to about
20,000 K;
forming a second layer on the first layer by plasma spraying particles of inorganic material having an average diameter that
is less than half of the average diameter of the particles forming the first layer, using a plasma gas arc flame at a temperature
of about 7,000 K to about 20,000 K;
whereby the outer surface of the second layer that is formed is hydrophobic, micro-rough and exhibits a self-cleaning property.
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