Hoya Corporation

Mitsugu Imai

Kazuaki Hashimoto

Osamu Sugihara

Tetsuo Takano

Tomoyuki Goto

An ion-exchanged glass article manufacturing method includes an ion-exchange step of bringing a glass article with a composition containing Li into contact with a molten salt dissolved solution containing an alkali metal element having an ionic radius larger than an ionic radius of the Li contained in the glass article, thereby ion-exchanging the Li in the glass article with the alkali metal element in the molten salt dissolved solution. At least one kind of additive selected from the group consisting of NaF, KF, KAlF, NaCO, NaHCO, KCO, KHCO, NaSO, KSO, KAl(SO), NaPO, and KPOis added to the molten salt dissolved solution so that the ion-exchange step is carried out while the additive is in a solid state.

Method of manufacturing an ion-exchanged glass article

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.

Glass substrate of cover glass for portable electronic device, image display unit for portable electronic device, portable electronic device and method of manufacturing glass substrate of cover glass for portable electronic device

Growing community of inventors

Tokyo, Japan

Mitsugu Imai