BENDABLE GLASS ARTICLES WITH ALKALI-FREE GLASS ELEMENTS
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United States of America Patent
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app pub date -
Nov 4, 2015
filing date -
Nov 4, 2014
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A bendable stack assembly that includes a glass element having a composition substantially free of alkali ions, an elastic modulus of about 40 GPa to about 100 GPa, a final thickness from about 20 μm to about 100 μm, a first primary surface substantially in tension upon a bending of the element, and a second primary surface substantially in compression upon the bending, the primary surfaces characterized by a prior material removal to the final thickness from an initial thickness that is at least 20 μm greater than the final thickness. The glass element also includes a protect layer on the first primary surface. In addition, the glass element is characterized by an absence of failure when the element is held during the bending at a bend radius of about 15 mm for at least 60 minutes at about 25 C and about 50% relative humidity.
First Claim
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