Agc Inc.

Orihara Industrial Co., Ltd.

Satoshi Ogami

Masao Ozeki

Satoshi Takeda

Shusaku Akiba

Satoshi Kanasugi

Kosho Akatsuka

Shuji Orihara

Yoshio Orihara

Kenji Imakita

Seiji Inaba

Takanori Fukushi

An inference method includes inferring a value that includes a stress value in a region located 50 μm or shallower from a surface of a chemically strengthened glass, by receiving as input at least a temperature and a time used upon chemical strengthening, and stress values at three or more different depth positions 20 μm or deeper from the surface of the chemically strengthened glass that has been obtained by chemically strengthening a glass having a thickness of 0.2 mm or greater with the temperature and the time.

Inference method, quality control method, chemically strengthened glass, inference program, storage medium, inference device, and method of manufacturing chemically strengthened glass

A sensor module includes: a base member; at least one of a single or a plurality of sensors and vibrators arranged on the base member; and a protective member constituted of at least one flat surface or a curved surface, provided so as to cover the at least one of the sensors and the vibrators. A part or whole of the protective member is formed of a strengthened glass and the strengthened glass is a chemically strengthened glass or a physically strengthened glass.

Sensor module and protective glass

A stress measurement device for strengthened glass includes a polarization phase difference variable member configured to vary a polarization phase difference of a laser light by one wavelength of the laser light or more; an imaging element configured to image a plurality of times at a predetermined time interval a scattered light emitted according to the laser light with the varied polarization phase difference entering the strengthened glass, and obtain a plurality of images; and an arithmetic unit configured to measure a periodic change in luminance of the scattered light using the plurality of images, calculate a change in a phase of the change in luminance, and calculate a stress distribution in a depth direction from a surface of the strengthened glass based on the change in the phase.

Stress measurement device for strengthened glass, stress measuring method for strengthened glass, manufacturing method of strengthened glass, and strengthened glass

An object of the present invention is to provide a chemically strengthened glass plate that is chemically strengthened and thereby increased in strength in its entirety, a portable information terminal using the chemically strengthened glass plate, and a manufacturing method of the a chemically strengthened glass plate. The chemically strengthened glass plate and the manufacturing method thereof according to the present invention is suitable for use in fields of portable information terminals, substrates, etc. in which glass plates having high resistance to impact are required.

Chemically strengthened glass plate, portable information terminal, and manufacturing method of chemically strengthened glass plate

A chemically strengthened glass obtained by chemically strengthening a lithium-containing aluminosilicate glass, when representing a sheet thickness of the chemically strengthened glass by t (&#x3bc;m) and an internal stress at a depth&#xd7;(&#x3bc;m) from a surface of the chemically strengthened glass by &#x3c3;(x) (MPa), has a value of a ratio C=rE/rEbeing greater than or equal to 0.7 and less than 1.0 where rE (kJ/m) is calculated from Expression (3) described above and rE=16&#xd7;t/1000+3.

Chemically strengthened glass

A chemically strengthened glass obtained by chemically strengthening a lithium-containing aluminosilicate glass, when representing a sheet thickness of the chemically strengthened glass by t (&#x3bc;m) and an internal stress at a depth x (&#x3bc;m) from a surface of the chemically strengthened glass by &#x3c3;(x) (MPa), has a value of a ratio C=rE/rEbeing greater than or equal to 0.7 and less than 1.0 where rE (kJ/m) is calculated from Expression (3) described above and rE=16&#xd7;t/1000+3.

Disclosed is a method of measuring a surface refractive index of a strengthened glass including causing light to enter a surface layer of the strengthened glass through a liquid provided with a refractive index equivalent to that of a surface of the surface layer; a process of causing the light to be emitted from the strengthened glass through the liquid; converting two types of light components into two types of emission line sequences; capturing an image of the two types of emission line sequences; measuring positions of respective emission lines of the two types of emission line sequences from the image; and calculating refractive indexes of a surface of the strengthened glass corresponding to the two types of light components, or refractive index distributions of the strengthened glass in a depth direction from the surface corresponding to the two types of light components.

Surface refractive index measurement method and surface stress measurement method using the same

The present invention relates to a chemically strengthened glass, in which CTand CTsatisfy CT/CT&#x2264;0.85, the CTsatisfies CT&#x3e;&#x2212;38.7&#xd7;ln(t/1000)+48.2 [MPa] and an internal energy density rE satisfies rE&#x2264;23.3&#xd7;t/1000+15 [kJ/m]. CS is a surface compressive stress value [MPa], &#x3c3; (x) is a compressive stress value [MPa] at a position x in a depth direction, DOL is a compressive stress depth [&#x3bc;m], and t is a sheet thickness [&#x3bc;m].

Growing community of inventors

Tokyo, Japan

Satoshi Ogami