Abstract: [Problem] To realize high reliability and high functionalization while suppressing characteristics variation in a multilayer interconnection substrate used in a microwave or millimeter-wave band integrated with an antenna. [Resolution Means] A multilayer substrate for high frequency with an antenna element formed on a surface. The multilayer substrate for high frequency has an intermediate substrate. The intermediate substrate consists of a low-temperature co-fired glass-ceramic substrate and has intermediate insulating layers consisting of a glass-ceramic and an internal conductor formed between these intermediate insulating layers. A surface insulating layer consisting of an organic material having a dielectric constant lower than a glass-ceramic material is stacked on a surface of the intermediate substrate. An outer-side via conductor penetrating this surface insulating layer is configured by a sintered metal that forms a metallic bond with a wiring conductor in the substrate.

Abstract: [Problem] The aim of the present invention lies in providing a glass ceramic sintered compact in which dielectric loss in a high-frequency region is reduced, without any reduction in sintering density, and also in providing a wiring board employing same. [Solution] A glass ceramic sintered compact containing a glass component, a ceramic filler and a composite oxide, characterized in that the glass component is crystallized glass on which is deposited a diopside oxide crystal phase including at least Mg, Ca and Si, and the composite oxide includes at least Al and Co.

Abstract: [Problem] The aim of the present invention lies in providing a glass ceramic sintered compact in which dielectric loss in a high-frequency region is reduced, without any reduction in sintering density, and also in providing a wiring board employing same. [Solution] A glass ceramic sintered compact containing a glass component, a ceramic filler and a composite oxide, characterized in that the glass component is crystallized glass on which is deposited a diopside oxide crystal phase including at least Mg, Ca and Si, and the composite oxide includes at least Al and Co.

Abstract: A multilayer wiring substrate includes a number of insulating layers, each insulating layer including a glass ceramic. A number of internal conductor layers are formed between the insulating layers. Via conductors penetrate through the insulating layers and mutually connect the internal conductor layers in different layer locations. Surface conductor layers are formed on an outer surfaces in a lamination direction of the insulating layers. The insulating layers include outside insulating layers and inside insulating layers. A first aspect ratio representing an oblateness and sphericity of an external filler contained in the outside insulating layers is larger than a second aspect ratio representing an oblateness and sphericity of an internal filler contained in the inside insulating layers. A thermal expansion coefficient of the outside insulating layers is smaller than a thermal expansion coefficient of the inside insulating layers.

Abstract: A multilayer wiring substrate includes a number of insulating layers, each insulating layer including a glass ceramic. A number of internal conductor layers are formed between the insulating layers. Via conductors penetrate through the insulating layers and mutually connect the internal conductor layers in different layer locations. Surface conductor layers are formed on an outer surfaces in a lamination direction of the insulating layers. The insulating layers include outside insulating layers and inside insulating layers. A first aspect ratio representing an oblateness and sphericity of an external filler contained in the outside insulating layers is larger than a second aspect ratio representing an oblateness and sphericity of an internal filler contained in the inside insulating layers. A thermal expansion coefficient of the outside insulating layers is smaller than a thermal expansion coefficient of the inside insulating layers.

Abstract: To provide a thermal head which provides an excellent adhesion between the common electrode and the heat element, and in which the content of Pb is sufficiently reduced. A thermal head 5, comprising a substrate 7, a glaze layer 3 provided on the substrate 7, a common electrode 4 provided on the glaze layer 3, a heat element 1 provided on the common electrode 4 and the glaze layer 3, and lead electrodes 2a and 2b provided on the heat element 1, wherein the common electrode 4 includes an electrically conductive material composed of metal and a glass frit, and the glass frit contains 15 to 35% by mass of ZnO, 14 to 34% by mass of SiO2, 2 to 25% by mass of Al2O3, 2 to 15% by mass of TiO2, 5 to 25% by mass of CaO, and 7 to 27% by mass of BaO.

Abstract: To provide a thermal head which provides an excellent adhesion between the common electrode and the heat element, and in which the content of Pb is sufficiently reduced. A thermal head 5, comprising a substrate 7, a glaze layer 3 provided on the substrate 7, a common electrode 4 provided on the glaze layer 3, a heat element 1 provided on the common electrode 4 and the glaze layer 3, and lead electrodes 2a and 2b provided on the heat element 1, wherein the common electrode 4 includes an electrically conductive material composed of metal and a glass frit, and the glass frit contains 15 to 35% by mass of ZnO, 14 to 34% by mass of SiO2, 2 to 25% by mass of Al2O3, 2 to 15% by mass of TiO2, 5 to 25% by mass of CaO, and 7 to 27% by mass of BaO.

Abstract: A spacer for a flat panel display having a coefficient of thermal expansion equal or close to that of a glass and having a strength and a predetermined conductivity is provided. The spacer for a flat panel display includes a sintered body containing MgAl2O4 preferably as a main phase. The sintered body preferably further contains MgO, and if it contains MgAl2O4 and MgO, a peak strength on a MgO (200) surface is preferably 0.5 to 50 when a peak strength on a MgAl2O4 (311) surface is 100 as measured by X-ray diffraction. The spacer is placed between a back plate having a cathode structure and a face plate placed with a predetermined spacing between itself and the back plate and having fluorescent pixel areas, and plays a role of maintaining the spacing.