LOW-WARP, STRENGTHENED ARTICLES AND ASYMMETRIC ION-EXCHANGE METHODS OF MAKING THE SAME
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United States of America
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Jan 6, 2022
app pub date -
Nov 8, 2019
filing date -
Nov 8, 2019
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Abstract
A method of making a strengthened article that includes: providing an article comprising a glass, glass-ceramic or ceramic composition with a plurality of ion-exchangeable alkali metal ions, a first primary surface and a second primary surface; forming a SiO2-containing film over the first primary surface, wherein the SiO2-containing film comprises a thickness from about 5 nanometers to about 20 nanometers; forming an anti-glare surface integral with the second primary surface; providing a first ion-exchange bath comprising a plurality of ion-exchanging alkali metal ions, each having a larger size than the size of the ion-exchangeable alkali metal ions; and submersing the article in the first ion-exchange bath at a first ion-exchange temperature and duration to form a strengthened article. Further, the strengthened article comprises a compressive stress region extending from the first primary surface and the second primary surface to first and second selected depths, respectively.
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