摘要:
A ceramic capacitor includes a capacitor body and a metal layer arranged on an outer surface of the capacitor body. The outer surface includes: a first capacitor major surface; a second capacitor major surface opposite to the first capacitor major surface in a thickness direction of the capacitor body; and a capacitor lateral surface between the first and second capacitor major surfaces. The capacitor body includes a first layer section and a second layer section. The first layer section includes a plurality of ceramic dielectric layers and a plurality of internal electrodes, wherein the ceramic dielectric layers and the internal electrodes are layered alternately. The second layer section is exposed at the first capacitor major surface, and includes a corner portion at a boundary between the first capacitor major surface and the capacitor lateral surface. The metal layer covers the corner portion of the second layer section.
摘要:
Powders of BaCO3, TiO2, ZnO, etc. are mixed to each other at a predetermined ratio of quantity, calcined in an atmospheric air at &pgr;°-120° C., and pulverized to obtain a calcined powder having an average grain size from 1 to 3 &mgr; m, 0.1 to 20 parts-by weight of a powder having an average grain size from 0.1 to 1.5 &mgr;m comprising a glass having a transition point of not higher than 450° C. obtained by mixing powders of Pb3O4, SiO2, Na2O, etc. to each other, melting and then pouring into water and pulverizing the thus obtained glass is admixed to the calcined powder. The mixture is dried, pelleted by adding a resin and the pellet powder is molded into a cylindrical shape, applied with CIP (Cold isotartic press), and the molding product after the treatment is sintered in an atmospheric air at 850° to 1000° C. to obtain a dielectric ceramic sintered at low temperature. The resultant dielectric ceramic has high denseness and high unloaded Q value while maintaining &tgr;f within a practical range.
摘要:
A ceramic capacitor includes a capacitor body and a metal layer arranged on an outer surface of the capacitor body. The outer surface includes: a first capacitor major surface; a second capacitor major surface opposite to the first capacitor major surface in a thickness direction of the capacitor body; and a capacitor lateral surface between the first and second capacitor major surfaces. The capacitor body includes a first layer section and a second layer section. The first layer section includes a plurality of ceramic dielectric layers and a plurality of internal electrodes, wherein the ceramic dielectric layers and the internal electrodes are layered alternately. The second layer section is exposed at the first capacitor major surface, and includes a corner portion at a boundary between the first capacitor major surface and the capacitor lateral surface. The metal layer covers the corner portion of the second layer section.
摘要:
A capacitor is provided having a tough surface portion which prevents cracking that tends to occur when the capacitor is built-in or surface-mounted on a wiring board. A ceramic sintered body of the capacitor includes a capacitor forming layer portion, a cover layer portion and an interlayer portion. The capacitor forming layer portion has a laminated structure wherein ceramic dielectric layers and inner electrodes connected to a peripheral portion of capacitor via conductors, are alternately laminated. The cover layer portion is exposed at a surface portion of the ceramic body and has a laminated structure wherein ceramic dielectric layers and dummy electrodes not connected to the capacitor via conductors, are alternately laminated.
摘要:
A first ceramic substrate includes a substrate (2) and a glaze layer (3), wherein the glaze layer has a surface having an Ra of 0.02 μm or less and a Ry of 0.25 μm or less. A second ceramic substrate is formed by subjecting a glass layer (24) formed on a surface of a substrate (2) to heating-and-pressurizing treatment, thereby forming a glaze layer (3) on the substrate (2), and planarization-polishing the surface of the glaze layer. A third ceramic substrate includes a substrate (2), a glaze layer (3) containing substantially no pores formed on the substrate (2) and the surface thereof being planarization-polished, and a wiring pattern (21), wherein at least one first end of the wiring pattern is exposed to the glaze layer (3) surface of the substrate (1), and at least one second end is exposed to another surface of the substrate (1).
摘要:
A first ceramic substrate includes a substrate (2) and a glaze layer (3), wherein the glaze layer has a surface having an Ra of 0.02 μm or less and a Ry of 0.25 μm or less. A second ceramic substrate is formed by subjecting a glass layer (24) formed on a surface of a substrate (2) to heating-and-pressurizing treatment, thereby forming a glaze layer (3) on the substrate (2), and planarization-polishing the surface of the glaze layer. A third ceramic substrate includes a substrate (2), a glaze layer (3) containing substantially no pores formed on the substrate (2) and the surface thereof being planarization-polished, and a wiring pattern (21), wherein at least one first end of the wiring pattern is exposed to the glaze layer (3) surface of the substrate (1), and at least one second end is exposed to another surface of the substrate (1).
摘要:
A calcium phosphate cement or the like which shows a low viscosity and excellent handleability in the step of kneading and achieves a high strength of the hardened body even though a kneading liquid is used in a small amount. A calcium phosphate cement containing a polysaccharide powder and 0.05 to 5% by weight of an N-alkyl-D-glucamine such as N-methyl-D-glucamine; or a calcium phosphate cement containing a calcium phosphate powder and a specific alkanolamine such as monoethanolamine. A calcium phosphate cement composition containing a calcium phosphate powder and a kneading liquid comprising an aqueous solution containing 0.1 to 10% by weight of an N-alkyl-D-glucamine such as N-methyl-D-glucamine or a kneading liquid containing a definite amount of a specific alkanolamine such as monoethanolamine.
摘要:
Powders of BaCO.sub.3, TiO.sub.2, ZnO, etc. are mixed to each other at a predetermined ratio of quantity, calcined in an atmospheric air at 90.degree.-120.degree. C., and pulverized to obtain a calcined powder having an average grain size from 1 to 3 .mu. m. 0.1 to 20 parts-by weight of a powder having an average grain size from 0.1 to 1.5 .mu.m comprising a glass having a transition point of not higher than 450.degree. C. obtained by mixing powders of Pb.sub.3 O.sub.4, SiO.sub.2, Na.sub.2 O, etc. to each other, melting and then pouring into water and pulverizing the thus obtained glass is admixed to the calcined powder. The mixture is dried, pelleted by adding a resin and the pellet powder is molded into a cylindrical shape, applied with CIP (Cold isotactic press), and the molding product after the treatment is sintered in an atmospheric air at 850.degree. to 1000.degree. C. to obtain a dielectric ceramic sintered at low temperature. The resultant dielectric ceramic has high denseness and high unloaded Q value while maintaining .tau.f within a practical range.
摘要:
A process for producing a high purity and dense calcium phosphate coating film with bioaffinity on a high strength base, such as a base for a substitute for a hard tissue in a living body, comprising (1) dissolving (a) a salt containing phosphorus, a salt containing calcium, and a chelating agent capable of coordinating to either one or both of the metallic ions of these salts or (b) a chelate compound containing at least one of phosphorus and calcium and a salt containing the other in a solvent to prepare a sediment-free coating solution, (2) coating a base with the coating solution, (3) drying the coated base, and (4) calcining the coated base.
摘要:
A glaze composition suitable for a thin chip substrate, for example. The glaze composition makes a low-temperature glazing possible and is superior in the electrical and chemical stability. The glaze composition can prevent even a thin substrate from warping and can easily form an extensive smooth glaze layer without deteriorating a thin glaze face. The components of the composition are 20% to 50% by weight of boron oxide, 5% to 35% by weight of aluminum oxide, and 15% to 55% by weight of at least one alkaline-earth oxide selected from the group consisting of calcium oxide, strontium oxide, magnesium oxide and barium oxide.