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:
Jul. 22, 2014
Filed:
Dec. 20, 2011
Kazuaki Hashimoto, Akiruno, JP;
Tomoyuki Goto, Ome, JP;
Mitsugu Imai, Yamanashi, JP;
Tetsuo Takano, Tachikawa, JP;
Kazuaki Hashimoto, Akiruno, JP;
Tomoyuki Goto, Ome, JP;
Mitsugu Imai, Yamanashi, JP;
Tetsuo Takano, Tachikawa, JP;
Hoya Corporation, Tokyo, JP;
Abstract
The present invention provides a glass substrate of a cover glass for a portable electronic device. The glass substrate includes a front face, a back face and an edge face. The edge face is at least partially formed by means of an etching treatment. A compressive stress layer, formed by means of an ion-exchanging method, is disposed on each of the front and back faces of the glass substrate. The compressive stress layer has the same thickness both in a planar-directional center part thereof and in a planar-directional end part thereof on each of the front and back faces of the glass substrate.