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US 2021/0230048 A1Published application
Crystallized glass substrate
AssigneeOhara Inc.
InventorsTOSHITAKA YAGI, KOHEI OGASAWARA, YUKI MOTOSHIMA, REIKA KOJIMA, YUTAKA YAMASHITA, NAOYUKI GOTO
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Abstract
To provide a crystallized glass substrate including a surface with a compressive stress layer, where a stress depth DOLzero of the compressive stress layer, at which the compressive stress is 0 MPa, is 45 to 200 μm, a compressive stress CS on an outermost surface of the compressive stress layer is 400 to 1400 MPa, and a central stress CT determined by using curve analysis is 55 to 300 MPa.
Claims8
A crystallized glass substrate including a surface with a compressive stress layer, wherein
- a stress depth DOLzero of the compressive stress layer is 45 to 200 μm, the stress depth DOLzero being a depth at which the compressive stress is 0 MPa,
- a compressive stress CS on an outermost surface of the compressive stress layer is 400 to 1400 MPa, and
- a central stress CT determined by using curve analysis is 55 to 300 MPa.
Dependencies are inferred from the claim text.