The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 12, 2024
Filed:
Aug. 09, 2018
Applicant:
Ohara Inc., Kanagawa, JP;
Inventors:
Toshitaka Yagi, Kanagawa, JP;
Kohei Ogasawara, Kanagawa, JP;
Yuki Motoshima, Kanagawa, JP;
Reika Kojima, Kanagawa, JP;
Yutaka Yamashita, Kanagawa, JP;
Naoyuki Goto, Kanagawa, JP;
Assignee:
OHARA INC., Kanagawa, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03C 3/087 (2006.01);
U.S. Cl.
CPC ...
C03C 3/087 (2013.01);
Abstract
To provide a crystallized glass substrate including a surface with a compressive stress layer, in which, CS is 400 to 1400 MPa and CT×(T−2×DOL)/CS×DOLis 0.60 or more, where CS (MPa) denotes a compressive stress on an outermost surface of the compressive stress layer, DOL(μm) denotes a stress depth of the compressive stress layer at which the compressive stress is 0 MPa, CT (MPa) denotes a central stress determined by curve analysis, and T (μm) denotes a thickness of the substrate.