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:
Apr. 06, 2021
Filed:
Sep. 16, 2016
Nippon Electric Glass Co., Ltd., Shiga, JP;
Mutsumu Fukada, Shiga, JP;
Kiyotaka Kinoshita, Shiga, JP;
NIPPON ELECTRIC GLASS CO., LTD., Shiga, JP;
Abstract
Provided is a tempered glass, including, on a surface thereof, a compressive stress layer having a compressive stress, and including a tensile stress layer having a tensile stress inside the compressive stress layer, wherein the tempered glass satisfies the following expression (1): DZ/DT<0.65 . . . (1) where DZ represents a zero stress depth (μm) indicating a depth from the surface to a reference position at which a stress becomes zero between the compressive stress layer and the tensile stress layer, and DT represents an alkali metal diffusion depth (μm) indicating a depth of a region layer, which has diffused therein an alkali metal ion that causes the compressive stress, from the surface, and wherein the tempered glass satisfies the following expression (2): CTM<73 . . . (2) where CTM represents a maximum tensile stress (MPa).