METHOD FOR MANUFACTURING STRENGTHENED GLASS SUBSTRATE, AND STRENGTHENED GLASS SUBSTRATE
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United States of America Patent
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Issued Date -
Apr 25, 2013
app pub date -
Aug 22, 2012
filing date -
Aug 23, 2011
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Abandoned
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Abstract
A method for manufacturing a strengthened glass substrate includes: a chemical strengthening step of chemically strengthening a plate glass material by ion-exchange; and a shaping step of cutting the chemically strengthened plate glass material by etching. In the chemical strengthening step, the ion-exchange is performed to satisfy the condition of 7≦Tave≦50 [MPa], when the thickness of the plate glass material is denoted by t [μm], the thickness of the compressive stress layer by d [μm], the maximum compressive stress value of the compressive stress layer by F [MPa], the compressive stress integrated value of the compressive stress layer by X [MPa·μm], the thickness of the tensile stress layer by t2 [μm], the average tensile stress value of the tensile stress layer by Tave [MPa], and the relationships represented by equations X=F×d, t2=t−2d and Tave=X/t2 are satisfied.
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