SCRATCH-RESISTANT WINDOWS WITH SMALL POLYCRYSTALS
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United States of America Patent
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Jun 27, 2016
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Jun 27, 2016
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Abstract
A window has an ion exchange substrate with a top surface. To improve robustness, the top surface has a polycrystalline aluminum oxide film formed from a plurality of crystals. At least 95% of the plurality of crystals in the aluminum oxide film has a largest dimension of no greater than about 10 nanometers. In addition, both the ion exchange substrate and aluminum oxide film are transparent or translucent.
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