Abstract: A plate-like chemically strengthened glass having a compression stress layer on the surface of the glass, wherein the compressive stress value (CS0) at the glass surface of is 500 MPa or more, the plate thickness (t) is 400 ?m or more, the compressive stress depth of layer (DOL) is (t×0.15) ?m or more, the compressive stress values (CS1) and (CS2) when the depth from the glass surface is ¼ and ½, respectively, are 50 MPa or more, m1 expressed by {m1=(CS1?CS2/(DOL/4?DOL/2)} is ?1.5 MPa/?m or more, m2 expressed by {m2=(CS2/(DOL/2?DOL)} is 0 MPa/?m or less, and m2 is less than m1.

Abstract: The present invention relates to a chemically strengthened glass satisfying A1 [MPa] of 600 or more, A2 [MPa] of 50 or more, B1 [?m] of 6 or less, B2 [?m] of 10% or more of t [?m], C [MPa] of ?30 or less, and A1/B1 [MPa/?m] of 100 or more when the chemically strengthened glass has a thickness t [?m] and a profile of a stress value [MPa] at a depth x [?m] from a glass surface is approximated by an error least-squares method in a region of 0<x<3t/8 using the following function while defining a compressive stress as positive and a tensile stress as negative: A1erfc(x/B1)+A2erfc(x/B2)+C, in which erfc is a complementary error function, and relations of A1>A2 and B1<B2 are satisfied.

Abstract: Provided are a glass body for pressure forming enabling press forming in a low-temperature range without the need of a special mold material, and a method for manufacturing the same. A glass body for pressure forming 1 having a porosified layer 1b formed by porosifying a surface thereof and having a Vickers hardness of 85 N/mm2 or less on the porosified surface. The porosified layer 1b can be manufactured by phase-separating the glass body by spinodal decomposition, acid-treating the phase-separated glass body and then treating the acid-treated glass body with alkali or hot water to porosify the surface of the glass body.

Abstract: To provide a glass ceramic composition with which a substrate for a light emitting element having a high reflectance and a high thermal conductivity can be obtained, and which can suppress breakage at the time of production of the substrate for a light emitting element. A glass ceramic composition to be used for production of a substrate on which a light emitting element is to be mounted, which comprises from 30 to 45 mass % of a glass powder, from 35 to 50 mass % of an alumina powder and from 10 to 30 mass % of a zirconia powder, to the total amount of the glass powder, the alumina powder and the zirconia powder, wherein the average particle size of the zirconia powder is at most ¼ of the average particle size of the alumina powder.

Abstract: Provided is a light-emitting device provided with a light reflection layer which has a high light reflectivity and which is less susceptible to deterioration of the reflectivity due to corrosion, and having an improved light extraction efficiency. A light-emitting device comprising a substrate having a conductor layer formed on its surface and a light-emitting element disposed on the conductor layer, characterized in that an overcoat layer is formed between the conductor layer and the light-emitting element, and the overcoat layer is a borosilicate glass which comprises, as represented by mol % based on oxides, from 62 to 84% of SiO2, from 10 to 25% of B2O3, from 0 to 5% of Al2O3 and from 0 to 5% in total of at least one of Na2O and K2O, provided that the total content of SiO2 and Al2O3 is from 62 to 84%, and may contain from 0 to 10% of MgO and at least one of CaO, SrO and BaO in a total content of at most 5%.

Abstract: The present invention is intended to provide an organic LED element in which the extraction efficiency is improved up to 80% of emitted light, and provides a translucent substrate comprising a translucent glass substrate; a scattering layer formed on the glass substrate and comprising a glass which contains a base material having a first refractive index for at least one wavelength of light to be transmitted and a plurality of scattering materials dispersed in the base material and having a second refractive index different from that of the base material; and a translucent electrode formed on the scattering layer and having a third refractive index higher than the first refractive index, wherein distribution of the scattering materials in the scattering layer decreases toward the translucent electrode.

Abstract: The present invention provides an organic LED element in which the extraction efficiency is improved up to 80% of emitted light. Further, the invention relates to an electrode-attached translucent substrate having a translucent substrate, a scattering layer formed over the glass substrate and containing a base material having a first refractive index for at least one wavelength of wavelengths of emitted light of an organic LED element and a plurality of scattering materials positioned in the base material and having a second refractive index different from that of the base material, and a translucent electrode formed over the scattering layer and having a third refractive index equal to or lower than the first refractive index, in which distribution of the scattering materials in the scattering layer decreases from the inside of the scattering layer toward the translucent electrode.

Abstract: A substrate for mounting a light-emitting element, containing a substrate main body having a mounting surface on which a light-emitting element is to be mounted, a reflection layer formed on a part of the mounting surface of the substrate main body and containing silver to reflect light emitted from the light-emitting element, and a vitreous insulating layer formed on the reflection layer, wherein the vitreous insulating layer contains a glass containing SiO2, at least one of Al2O3 and B2O3, and at least one member selected from Li2O, Na2O and K2O, wherein (Li2O+Na2O+K2O)—Al2O3 is from ?20 to 1.5% and Si02+3×Al2O3 is at most 90% calculated using the mol % of each of said SiO2, Al2O3 B2O3, Li2O, Na2O and K2O in said glass.

Abstract: An object of the invention is to provide an optical glass for precision press having optical properties of a high refractive index and a low dispersion property and having a low molding temperature, a high devitrification resistance, an excellent molding property, and a small specific gravity. The optical glass of the invention contains, in terms of % by mass on the basis of oxides, respective components of B2O3: 10 to 20%, SiO2: 0.5 to 12%, La2O3: 25 to 50%, Gd2O3: 0 to 20%, Y2O3: 0 to 20%, provided that La2O3+Gd2O3+Y2O3: 35 to 60%, ZnO: 5 to 20%, Li2O: 0.2 to 3%, ZrO2: 0 to 0.5%, Ta2O5: 3 to 18% and WO3: 3 to 20%, and has optical constants of a refractive index nd of 1.84 to 1.86 and an Abbe number vd of 37 to 42 and a glass transition point (Tg) of 630° C. or lower.

Abstract: To provide a substrate for mounting a light-emitting element having a reflectance increased since light which is transmitted through the substrate and leaks out in directions other than the direction from which the light enters is reduced, and having a reduced firing shrinkage in the plane direction. A substrate for mounting a light-emitting element of the present invention is made of a glass ceramic 10 containing glass 1 and a flat oxide type ceramic filler 2 having an average aspect ratio of at least 25 dispersed in the glass 1. The ceramic filler 2 is contained in a state where it is aligned in parallel with the plane direction of the substrate, and the glass ceramic 10 contains no crystals except for the ceramic constituting the filler. This substrate has an extremely high reflectance of at least 84% (thickness: 300 ?m) to light in the visible region.

Abstract: To provide a light emitting diode package of which the height of protrusion of a thermal via is decreased without decreasing the flexural strength of an insulating substrate. A light emitting diode package comprising a light emitting diode element mounted on a substrate, wherein the substrate is obtained by firing a glass ceramic composition containing a powder of glass containing, as represented by mole percentage, from 57 to 65% of SiO2, from 13 to 18% of B2O3, from 9 to 23% of CaO, from 3 to 8% of Al2O3 and from 0.5 to 6% of at least one of K2O and Na2O in total, and a ceramic filler.

Abstract: A ceramic material composition comprising from 20 to 50 mass % of a borosilicate glass powder, from 25 to 55 mass % of an alumina filler powder and from 10 to 45 mass % of a filler powder (a high refractive index filler powder) having a refractive index higher than the alumina filler powder, wherein the borosilicate glass powder comprises, as calculated as oxides, from 30 to 70 mass % of SiO2, from 5 to 28 mass % of B2O3, from 5 to 30 mass % of Al2O3, from 3 to 35 mass % of CaO, from 0 to 25 mass % of SrO, from 0 to 25 mass % of BaO, from 0 to 10 mass % of Na2O, from 0 to 10 mass % of K2O, from 0.5 to 10 mass % of Na2O+K2O and from 3 to 40 mass % of CaO+SrO+BaO, and satisfies the following conditions: in the borosilicate glass powder, as represented by mass %, the value of “three times the B2O3 content”+“twice (the CaO content+the SrO content+the BaO content)”+“ten times (the Na2O content+the K2O content)”, is within a range of from 105 to 165.

Abstract: A lead-free glass for covering electrodes including, as represented by mass % based on the following oxides, from 30 to 50% of B2O3, from 21 to 25% of SiO2, from 10 to 35% of ZnO, from 7 to 14% in total of K2O and either one or both of Li2O and Na2O, from 0 to 10% of Al2O3, and from 0 to 10% of ZrO2, wherein when it contains at least one component selected from the group consisting of MgO, CaO, SrO and BaO, the total of their contents is at most 5%, and when the molar fractions of Li2O, Na2O and K2O are represented by l, n and k, respectively, l is at most 0.025, and l+n+k is from 0.07 to 0.17.

Abstract: The present invention provides an organic LED element in which the extraction efficiency is improved up to 80% of emitted light. Further, the invention relates to an electrode-attached translucent substrate having a translucent substrate, a scattering layer formed over the glass substrate and containing a base material having a first refractive index for at least one wavelength of wavelengths of emitted light of an organic LED element and a plurality of scattering materials positioned in the base material and having a second refractive index different from that of the base material, and a translucent electrode formed over the scattering layer and having a third refractive index equal to or lower than the first refractive index, in which distribution of the scattering materials in the scattering layer decreases from the inside of the scattering layer toward the translucent electrode.

Abstract: The present invention has an object to provide an optical glass which has middle refractive index and low dispersibility, a low yield point (Ts) and a liquidus temperature (L.T.) and excellent weather resistance, and is suitable for mold press molding. The present invention relates to an optical glass comprising, in mass % on oxide basis, SiO2: 20 to 40%, B2O3: 10 to 30%, SrO: 10 to 30%, Al2O3: 5.5 to 15%, La2O3: 0.5 to 11%, Li2O: 3 to 12%, CaO: 0 to 10%, BaO: 0 to 9.5%, and ZnO: 0 to 10%.

Abstract: The present invention provides an organic LED element in which the extraction efficiency is improved up to 80% of emitted light. Further, the invention relates to an electrode-attached translucent substrate having a translucent substrate, a scattering layer formed over the glass substrate and containing a base material having a first refractive index for at least one wavelength of wavelengths of emitted light of an organic LED element and a plurality of scattering materials positioned in the base material and having a second refractive index different from that of the base material, and a translucent electrode formed over the scattering layer and having a third refractive index equal to or lower than the first refractive index, in which distribution of the scattering materials in the scattering layer decreases from the inside of the scattering layer toward the translucent electrode.

Abstract: To provide a substrate for a light-emitting device, which is provided with a reflection layer having a high optical reflectance and being less susceptible to deterioration of the reflectance due to corrosion and which has an improved light extraction efficiency, and a light-emitting device employing such a substrate.

Abstract: To provide non-lead glass for covering electrodes, whereby the strength of front substrates of plasma display devices can be improved, and the dielectric constant can be made small. Non-lead glass for covering electrodes, which comprises, as represented by mol % based on the following oxides, from 42 to 52% of B2O3, from 40 to 48% of SiO2, from 3.5 to less than 7% of K2O and from 0 to 6% of ZrO2, wherein the total content of B2O3 and SiO2 is at least 88%. Further, a plasma display device comprising a front glass substrate to be used as a display surface, a rear glass substrate and barrier ribs to define cells, wherein transparent electrodes formed on the front glass substrate or the rear glass substrate are covered with the above non-lead glass for covering electrodes.

Abstract: Provided is a light-emitting device provided with a light reflection layer which has a high light reflectivity and which is less susceptible to deterioration of the reflectivity due to corrosion, and having an improved light extraction efficiency. A light-emitting device comprising a substrate having a conductor layer formed on its surface and a light-emitting element disposed on the conductor layer, characterized in that an overcoat layer is formed between the conductor layer and the light-emitting element, and the overcoat layer is a borosilicate glass which comprises, as represented by mol % based on oxides, from 62 to 84% of SiO2, from 10 to 25% of B2O3, from 0 to 5% of Al2O3 and from 0 to 5% in total of at least one of Na2O and K2O, provided that the total content of SiO2 and Al2O3 is from 62 to 84%, and may contain from 0 to 10% of MgO and at least one of CaO, SrO and BaO in a total content of at most 5%.

Abstract: A ceramic material composition comprising from 20 to 50 mass % of a borosilicate glass powder, from 25 to 55 mass % of an alumina filler powder and from 10 to 45 mass % of a filler powder (a high refractive index filler powder) having a refractive index higher than the alumina filler powder, wherein the borosilicate glass powder comprises, as calculated as oxides, from 30 to 70 mass % of SiO2, from 5 to 28 mass % of B2O3, from 5 to 30 mass % of Al2O3, from 3 to 35 mass % of CaO, from 0 to 25 mass % of SrO, from 0 to 25 mass % of BaO, from 0 to 10 mass % of Na2O, from 0 to 10 mass % of K2O, from 0.5 to 10 mass % of Na2O+K2O and from 3 to 40 mass % of CaO+SrO+BaO, and satisfies the following conditions: in the borosilicate glass powder, as represented by mass %, the value of “three times the B2O3 content”+“twice (the CaO content+the SrO content+the BaO content)”+“ten times (the Na2O content+the K2O content)”, is within a range of from 105 to 165.