Asahi Glass Company, Limited

Agc Inc.

Tsubota Laboratory, Inc.

Asabi Glass Company, Limited

Tetsuya Nakashima

Kei Maeda

Kensuke Nagai

Kazutaka Ono

Jun Endo

Shusaku Akiba

Tatsuo Nagashima

Hiroyuki Hijiya

Yasumasa Nakao

Hiroyuki Ohkawa

Yutaka Kuroiwa

Shigeki Sawamura

Yusuke Kobayashi

Seiki Ohara

Suguru Murayama

Atsuyoshi Takenaka

Yusuke Arai

Akio Koike

Noriaki Shimodaira

Yuichi Yamamoto

Manabu Nishizawa

Naoya Wada

Yuichi Suzuki

Yuki Kondo

Kazuo Tsubota

Shigeru Niki

Yuichi Kuroki

Masamichi Tanida

Eriko Maeda

Toshihide Kurihara

Shogo Ishizuka

Jun Sasai

Hidemasa Torii

Katsuaki Miyatani

Ryoji Akiyama

Akira Kondo

Yasushi Kawamoto

Toru Momose

Masahiko Tamura

Manuel Diaz Reyes

Daiki Akie

Tomomi Abe

A wavelength-selective transmissive glass has a light transmittance Tat a wavelength of more than 315 nm and 400 nm or less represented by the formula shown below of 1% or more in terms of a plate thickness of 6 mm and a light transmittance Tat a wavelength of 315 nm or less represented by the formula shown below of 60% or less in terms of a plate thickness of 6 mm. Ais a weighting factor at a wavelength k (nm) for calculating T (light transmittance) defined in ISO-9050:2003, and Tis a transmittance at the wavelength k (nm) in terms of a plate thickness of 6 mm:=(&#x3a3;)/(&#x3a3;)=(&#x3a3;)/(&#x3a3;).

Glass

A glass plate, with a thickness &#x3b8; of 1.0 mm or more, having first and second main surfaces and end surfaces, includes 1 to 80 weight ppm of iron in terms of FeOwith 0.1 to 10.0 weight ppm of Fe; and 0.1 to 10.0 weight ppm of Ni, Mn, Cr, Co and V in total. In a sample with a size of 50 mm&#xd7;50 mm&#xd7;&#x3b8; obtained from the glass plate, and an arithmetic average roughness of the main surfaces and first and second cut surfaces being 0.1 &#x3bc;m or less, a first average absorbance coefficient for a wavelength of 400 to 700 nm measured on the first main surface in a normal direction is 0.009 or less, and a ratio of a second average absorbance coefficient measured on the first cut surface, to the first absorbance coefficient is 1.3 or less.

Glass plate

The present invention pertains to a glass for a data storage medium substrate which contains a specific amount of each of SiO, AlO, MgO, CaO, SrO, BaO, LiO, NaO, and KO, in molar percentage based on the oxides, and does not substantially contain BOor ZrO, wherein the sum of the LiO, NaO, and KO contents (RO), the molar ratio of the SiOcontent to the AlOcontent (SiO/AlO), and the molar ratio of the sum of the SiOand AlOcontents (SiO+AlO) to RO[(SiO+AlO)/RO] fall within their specific ranges, formula (1): 90&#x3c;[SiO]+2&#xd7;[AlO]+0.8&#xd7;[RO]&#x2212;0.5&#xd7;[RO] [in formula (1), RO represents the sum of the MgO, CaO, SrO, and BaO contents] is satisfied, and the glass transition point T, the alkali resistance, and the acid resistance fall within their specific ranges.

Glass for data storage medium substrate, glass substrate for data storage medium, and magnetic disk

To provide glass to be used for chemically tempered glass, of which the strength is less likely to be reduced even when indentations are formed thereon. Glass for chemical tempering, which comprises, as represented by mole percentage based on oxides, from 62 to 68% of SiO, from 6 to 12% of AlO, from 7 to 13% of MgO, from 9 to 17% of NaO, and from 0 to 7% of KO, wherein the difference obtained by subtracting the content of AlOfrom the total content of NaO and KO is less than 10%, and when ZrOis contained, its content is at most 0.8%. Chemically tempered glass obtained by chemically tempering such glass for chemical tempering. Such chemically tempered glass has a compressive stress layer formed on the glass surface, which has a thickness of at least 30 &#x3bc;m and a surface compressive stress of at least 550 MPa.

Glass for chemical tempering, chemically tempered glass, and glass plate for display device

To provide chemically tempered glass which is less likely to break even if scratched. Chemically tempered glass, which comprises, as represented by mole percentage based on the following oxides, from 56 to 72% of SiO, from 8 to 20% of AlO, from 9 to 25% of NaO, from 0 to 2% of KO, and from 0 to 15% of MgO, and which has a surface compressive stress of at least 900 MPa and an internal tensile stress of at most 30 MPa. Glass for chemical tempering, which comprises, as represented by mole percentage based on the following oxides, from 56 to 69% of SiO, from 8 to 16% of AlO, from 9 to 22% of NaO, from 0 to 1% of KO, from 5.5 to 14% of MgO, from 0 to 2% of ZrO, and from 0 to 6% of BO.

Glass for chemical tempering and chemically tempered glass

To provide a glass plate excellent in the internal transmittance of light rays in the visible region. A glass plate consisting of multicomponent oxide glass, which has an effective optical path length of from 25 to 200 cm, a thickness of from 0.5 to 10 mm, and an average internal transmittance in the visible region of at least 80% and a chromaticity Y of tristimulus values in the XYZ colorimetric system as defined in JIS Z8701 (Appendix) of at least 90%, under the effective optical path length.

Glass plate, light guide plate unit, planar light-emitting device, and liquid crystal display device

The present invention provides a cover glass for a display, having high durability to slow cracking and strong abraded strength even though a compressive stress is large and a depth of a compressive stress layer is deep. The present invention relates to a cover glass for a display, in which a depth of a compressive stress layer (DOL) is 30 &#x3bc;m or more, a surface compressive stress is 300 MPa or more, a position (HW) at which a compressive stress is half of a value of the surface compressive stress is a position of 8 &#x3bc;m or more from a glass surface, and the depth of the compressive stress layer (DOL) and the position (HW) at which the compressive stress is half of the value of the surface compressive stress satisfy the following formula:0.05&#x2266;&#x2266;0.23&#x2003;&#x2003;(1).

Display cover glass and display cover glass fabrication method

The present invention relates to a float glass for chemical strengthening, containing a bottom surface coming into contact with a molten metal at the time of forming and a top surface opposing the bottom surface, in which a difference &#x394;(N&#x2014;NaO) determined by subtracting a square of a normalized NaO surface concentration of the bottom surface which is a value obtained by dividing an NaO concentration in the bottom surface by an NaO concentration at a depth position of 100 &#x3bc;m therefrom, from a square of a normalized NaO surface concentration of the top surface which is a value obtained by dividing an NaO concentration in the top surface by an NaO concentration at a depth position of 100 &#x3bc;m therefrom, is 0.040 or less.

Float glass for chemical strengthening

To provide a method for producing a magnetic disk, whereby a magnetic recording layer is formed at a high temperature. A method for producing a magnetic disk, which comprises a step of forming a magnetic recording layer on a glass substrate having a temperature of at least 550&#xb0; C., wherein the glass substrate comprises, as represented by mol percentage, from 62 to 74% of SiO, from 6 to 18% of AlO, from 2 to 15% of BOand from 8 to 21%, in total, of at least one component selected from MgO, CaO, SrO and BaO, provided that the total content of the above seven components is at least 95%, and further contains less than 1%, in total, of at least one component selected from LiO, NaO and KO, or contains none of these three components.

Method for producing magnetic disk, and glass substrate for information recording medium

A glass substrate for a CIGS solar cell, having high cell efficiency and high glass transition temperature is provided. The glass substrate for a vapor-deposited CIGS film solar cell has a glass transition temperature of at least 580&#xb0; C. and an average thermal expansion coefficient of from 70&#xd7;10to 100&#xd7;10/&#xb0; C., wherein the ratio of the average total amount of Ca, Sr and Ba within from 10 to 40 nm in depth from the surface of the glass substrate to the total amount of Ca, Sr and Ba at 5,000 nm in depth from the surface of the glass substrate is at most 0.35, and the ratio of the average Na amount within from 10 to 40 nm in depth from the surface of the glass substrate after heat treatment to such average Na amount before the heat treatment is at least 1.5.

Glass substrate for Cu-In-Ga-Se solar cell and solar cell using same

Glass for a display device, which comprises, as represented by mole percentage based on the following oxides, from 61 to 72% of SiO, from 8 to 17% of AlO, from 6 to 18% of LiO, from 2 to 15% of NaO, from 0 to 8% of KO, from 0 to 6% of MgO, from 0 to 6% of CaO, from 0 to 4% of TiO, and from 0 to 2.5% of ZrO, and having a total content RO of LiO, NaO and KO of from 15 to 25%, a ratio LiO/RO of the LiO content to RO of from 0.35 to 0.8, and a total content of MgO and CaO of from 0 to 9%.

Glass for display device and glass plate

To provide glass to be used for a substrate which is, as a substrate, less susceptible to surface roughening even if subjected to cleaning by means of a strongly acidic solution. Glass for a substrate, which comprises, as represented by mol % based on the following oxides, from 62.5 to 69% of SiO, from 9 to 15.5% of AlO, from 8 to 16 of LiO, from 0 to 8% of NaO, from 0 to 7% of KO and from 0 to 3.5% of ZrO, provided that SiO&#x2014;AlOis at least 53.3%, LiO+NaO+KO is from 17 to 24%, and the total of contents of the above six components is at least 97%.

Glass for substrate, and glass substrate

To provide glass for a data storage medium substrate, whereby high heat resistance can be obtained. Glass for a data storage medium substrate, which comprises, as represented by mol percentage based on the following oxides, from 55 to 70% of SiO, from 2.5 to 9% of AlO, from 0 to 10% of MgO, from 0 to 7% of CaO, from 0.5 to 10% of SrO, from 0 to 12.5% of BaO, from 0 to 2.5% of TiO, from 0.5 to 3.7% of ZrO, from 0 to 2.5% of LiO, from 0 to 8% of NaO, from 2 to 8% of KO and from 0.5 to 5% of LaO, provided that the total content of AlOand ZrO(AlO+ZrO) is at most 12%, and the total content of LiO, NaO and KO (RO) is at most 12%.

Glass for data storage medium substrate, glass substrate for data storage medium and magnetic disk

Growing community of inventors

Tokyo, Japan

Tetsuya Nakashima