METHOD OF GROWING ALUMINUM OXIDE ONTO SUBSTRATES BY USE OF AN ALUMINUM SOURCE IN AN ENVIRONMENT CONTAINING PARTIAL PRESSURE OF OXYGEN TO CREATE TRANSPARENT, SCRATCH-RESISTANT WINDOWS
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United States of America Patent
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Issued Date -
Sep 18, 2014
app pub date -
Dec 10, 2013
filing date -
Mar 15, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A system and process for inter alia coating a substrate such as glass substrate with a layer of aluminum oxide to create a scratch-resistant and shatter-resistant matrix comprised of a thin scratch-resistant aluminum oxide film deposited on one or more sides of a transparent and shatter-resistant substrate for use in consumer and mobile devices such as watch crystals, cell phones, tablet computers, personal computers and the like. The system and process may include a sputtering technique. The system and process may produce a thin window that has a thickness of about 2 mm or less, and the matrix (i.e., the combination of the aluminum oxide film and transparent substrate) may have a shatter resistance with a Young's Modulus value that is less than that of sapphire, i.e., less than about 350 gigapascals (GPa). The thin window has superior shatter-resistant characteristics.
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