TOUGHENED GLASS SUBSTRATE AND MANUFACTURING PROCESS THEREFOR
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United States of America Patent
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Dec 4, 2014
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Jun 25, 2012
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Abstract
An object is to devise a tempered glass substrate that has high mechanical strength and hardly undergoes breakage even though having a large size. A tempered glass substrate has a compressive stress layer in a surface thereof, and includes 1 piece/cm3 or less of devitrified stones containing Zr.
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