METHOD OF ANNEALING SAPPHIRE
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United States of America Patent
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Issued Date -
Apr 16, 2015
app pub date -
Sep 18, 2014
filing date -
Oct 16, 2013
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Abstract
A method of annealing at least one sapphire lamina is disclosed. The method comprises at least two different heating steps and produces an annealed sapphire lamina having improved optical properties that can be used for fabricating a cover plate of an electronic device. The cover plate and electronic device comprising the annealed sapphire lamina are also disclosed.
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