Abstract: Provided is a resin material having non-ohmic properties which has favorable characteristics as a varistor and has a high degree of molding freedom and impact resistance. A resin material 10 comprises: an insulating matrix 11 made of a first resin material; an island-form conductive dispersed phase 12 made of a conductive second resin material which is incompatible with the first resin material and is more wettable to a microvaristor 13 described later than the first resin material is, wherein the island-form conductive dispersed phase is dispersed in an island form in the matrix and has a volume ratio of less than 16% in the whole resin material; and a microvaristor 13 comprising ceramic particles having non-ohmic properties, wherein the ceramic particles are dispersed in the matrix 11 and electrically contacted with each other via the island-form conductive dispersed phase 12.

Abstract: Provided is a resin material having non-ohmic properties which has favorable characteristics as a varistor and has a high degree of molding freedom and impact resistance. A resin material 10 comprises: an insulating matrix 11 made of a first resin material; an island-form conductive dispersed phase 12 made of a conductive second resin material which is incompatible with the first resin material and is more wettable to a microvaristor 13 described later than the first resin material is, wherein the island-form conductive dispersed phase is dispersed in an island form in the matrix and has a volume ratio of less than 16% in the whole resin material; and a microvaristor 13 comprising ceramic particles having non-ohmic properties, wherein the ceramic particles are dispersed in the matrix 11 and electrically contacted with each other via the island-form conductive dispersed phase 12.

Abstract: Provided is a technique to secure compositional or microstructural uniformity of a ceramic sintered body while increasing the area of the ceramic sintered boy, thus improving basic performance including non-linearity, maximum withstand energy and aging characteristics. A plurality of small varistor pieces 11 and insulating resin are kneaded and extruded for shaping, whereby a sheet-form varistor layer 13 can be formed where a plurality of small varistor pieces 11 are spaced from one another and are aligned on the same plane, and the adjacent small varistor pieces 11 are bonded via insulating resin.

Abstract: Provided is a technique to secure compositional or microstructural uniformity of a ceramic sintered body while increasing the area of the ceramic sintered boy, thus improving basic performance including non-linearity, maximum withstand energy and aging characteristics. A plurality of small varistor pieces 11 and insulating resin are kneaded and extruded for shaping, whereby a sheet-form varistor layer 13 can be formed where a plurality of small varistor pieces 11 are spaced from one another and are aligned on the same plane, and the adjacent small varistor pieces 11 are bonded via insulating resin.

Abstract: Here disclosed is an ink jet apparatus having an ink-circulating/dispersing function. The apparatus provides ink with dispersion as required, and circulates the ink through a tube to an ink-collecting tank. During this circulation, a required amount of the ink is fed to a printer head to form a predetermined pattern on a surface of a substrate. By virtue of the circulating/dispersing function, the apparatus can cope well with easy-to-aggregate ink having poor stability in terms of printing, thereby protecting a printer head or an ink-spouting section from clogging during ink jet printing. Such stabilized ink jet printing contributes to manufacturing highly reliable electronic components with an increased yield of products.

Abstract: A method of manufacturing an electronic component utilizing an ink jet method using an ink including water or organic solvent, and one of metal powder, ceramic powder, magnetic powder, glass powder, and resistor powder with particle size of 0.001 ?m or more to 10 ?m or less, dispersed in this water or organic solvent, by 1 wt. % or more to 80 wt. % or less, at viscosity of 2 poise or less.

Abstract: Here disclosed is an ink jet apparatus having an ink-circulating/dispersing function. The apparatus provides the ink with dispersion as required, and circulates the ink through the tube to the ink-collecting tank. In the circulation, a required amount of the ink is fed to the printer head to form a predetermined pattern on the surface of a substrate. By virtue of the circulating/dispersing function, the apparatus can cope well with easy-to-aggregate ink having poor stability in printing, protecting the printer head or the ink-spouting section from clogging in ink jet printing. Such stabilized ink jet printing contributes to manufacturing highly reliable electronic components with increased yield of products.

Abstract: A method for selectively and rapidly extracting/removing a plasticizer from a compact such as a green laminate that is produced at a certain point in the process of manufacturing a multilayer ceramic capacitor. Carbon dioxide is introduced into a pressure chamber in which the green laminate has been placed, and the temperature and the pressure of the pressure chamber are set to 40° C. and 10 MPa, respectively, so that the pressure chamber is filled with a supercritical carbon dioxide. The plasticizer is extracted/removed from the green laminate by using the supercritical carbon dioxide. Then, a de-binder step and a baking step are performed in an ordinary manner. By performing the de-plasticizer process of selectively extracting/removing the plasticizer before the de-binder step, it is possible to suppress the formation of a graphite-like substance even if the temperature is increased rapidly in the subsequent de-binder step and the baking step.

Abstract: The present invention relates to an ink for electronic component used in various electronic appliances such as laminate ceramic capacitor, LC filter, and complex high frequency component, a manufacturing method of electronic component by using this ink for electronic component, and an ink jet device, and is intended to present an ink for electronic component capable of re-dissolving and baking a ceramic green sheet, a manufacturing method of electronic component by using this ink for electronic component, and an ink jet device. To achieve this object, by manufacturing an electronic component by an ink jet method using an ink for electronic component comprising water or organic solvent, and one of metal powder, ceramic powder, magnetic powder, glass powder, and resistor powder with particle size of 0.001 &mgr;m or more to 10 &mgr;m or less, dispersed in this water or organic solvent, by 1 wt. % or more to 80 wt.

Abstract: A method of manufacturing an electronic component utilizing an ink jet method using an ink including water or organic solvent, and one of metal powder, ceramic powder, magnetic powder, glass powder, and resistor powder with particle size of 0.001 &mgr;m or more to 10 &mgr;m or less, dispersed in this water or organic solvent, by 1 wt. % or more to 80 wt. % or less, at viscosity of 2 poise or less.

Abstract: The invention relates to a method of laminating ceramic greenware sheets with electrodes embedded therein (25) which is formed on a support by pressure-adhering a ceramic greenware sheet with an electrode embedded therein onto a second ceramic greenware sheet or other electrodes (23), then peeling off the support alone and transferring the ceramic greenware sheet with the embedded electrodes onto the second ceramic greenware sheet or the other electrodes. This manufacturing method enables it to laminate ceramic greenware sheets each the thickness of which is as thin as 20 micrometers or less, while maintaining their mechanical strength and embedded electrodes in the ceramic greenware sheets, thereby enabling it to prevent a occurrence of surface irregularities due to the thickness of the electrodes even when laminating to a high degree.

Abstract: A method for selectively and rapidly extracting/removing a plasticizer from a compact such as a green laminate that is produced at a certain point in the process of manufacturing a multilayer ceramic capacitor. Carbon dioxide is introduced into a pressure chamber in which the green laminate has been placed, and the temperature and the pressure of the pressure chamber are set to 40° C. and 10 MPa, respectively, so that the pressure chamber is filled with a supercritical carbon dioxide. The plasticizer is extracted/removed from the green laminate by using the supercritical carbon dioxide. Then, a de-binder step and a baking step are performed in an ordinary manner. By performing the de-plasticizer process of selectively extracting/removing the plasticizer before the de-binder step, it is possible to suppress the formation of a graphite-like substance even if the temperature is increased rapidly in the subsequent de-binder step and the baking step.

Abstract: Zinc oxide ceramics and a method for producing the same are provided wherein zinc oxide varistors for low and high voltages having excellent electric characteristics and high reliability upon DC loading and surge can be obtained in high yield by low-temperature sintering. 0.2 to 20 parts by weight of a mixed powder of bismuth oxide, titanium oxide and antimony oxide is treated in advance at a temperature of 850.degree. C. or less. The synthetic powder thus obtained is added to 100 parts by weight of ZnO material powder to produce ceramics. By using the ceramics for a zinc oxide varistor, a zinc oxide varistor for a low or high voltage can be produced in high yield, which can be sintered at a low temperature and is excellent in electric characteristics and reliability upon DC loading and surge. Aluminum is sprayed on both sides of a sintered body so that an aluminum layer is formed. Copper is sprayed on the aluminum layer so that an electrode is formed. A lead wire is bonded to the electrode.

Abstract: An electronic component applied to a multilayer ceramic and the like, and a manufacturing method thereof. It is aimed to eliminate a step of grinding multilayer-sintered-body that is used for coupling an inner electrode with an outer electrode, and improve electrical contact between the outer electrode and the inner electrode that is thinned in size. Vapor of material different from the inner electrode (12) is collected selectively only on an appearing end of inner electrode (12) embeded in the component during the firing, whereby conductive section (13) is formed. The conductive section is swelled to the side face of sintered body, which realizes electric contact between inner electrode (12) and outer electrode (14) readily.

Abstract: A furnace for manufacturing ceramics is disclosed. The furnace contains a cylindrical heat resistant container, a furnace body for heating the cylindrical heat resistant container, and driving means for driving the cylindrical heat resistant container. The cylindrical heat resistant container rotates about a central shaft. At the same time, a first end and alternately a second end of the cylindrical heat resistant container are raised and lowered periodically, thus creating a seesaw motion while any material contained in the cylindrical heat resistant container is fired by the furnace body.

Abstract: By performing a debinder process before or at the time of firing, and by enhancing a programming rate in the temperature range of 650.degree..about.950.degree. C., the size of particles shows less distribution. Also, when the temperature comprising the particle growth range of 1025.degree..about.1200.degree. C. is maintained for many hours, a zinc oxide varistor having relatively large and uniformly formed particles can be provided. When a zinc oxide varistor compound is fired, a solid solution of zinc oxide spinel is fired at the programming rate of 175.degree. to 500.degree. C./hr in the temperature range comprising the primary phase of from 650.degree. to 950.degree. C., and at the programming rate of 30.degree. to 500.degree. C./hr in the range of from 1250.degree. to 1300.degree. C. Accordingly, a zinc oxide varistor having comparatively large and uniformed formed particles can be obtained. Sintered products obtained in this way show less distribution in operating voltage.

Abstract: Zinc oxide ceramics and a method for producing the same are provided wherein zinc oxide varistors for low and high voltages having excellent electric characteristics and high reliability upon DC loading and surge can be obtained in high yield by low-temperature sintering. 0.2 to 20 parts by weight of a mixed powder of bismuth oxide, titanium oxide and antimony oxide is treated in advance at a temperature of 850.degree. C. or less. The synthetic powder thus obtained is added to 100 parts by weight of ZnO material powder to produce ceramics. By using the ceramics for a zinc oxide varistor, a zinc oxide varistor for a low or high voltage can be produced in high yield, which can be sintered at a low temperature and is excellent in electric characteristics and reliability upon DC loading and surge. Aluminum is sprayed on both sides of a sintered body so that an aluminum layer is formed. Copper is sprayed on the aluminum layer so that an electrode is formed. A lead wire is bonded to the electrode.

Abstract: The invention is directed to a method of firing ceramics and a furnace for manufacturing ceramics. Ceramic forms are first fired in a cylindrical heat resistant container in a furnace core tube by using a lateral tubular furnace to increase their mechanical strength. Then, the container is rotated while the ceramic forms are fired further in a predetermined temperature region, which includes a maximum temperature. In this manner the ceramic forms are heated in a uniform state, both thermally and atmospherically, while receiving moderate impact by rotation, and defective appearance and fluctuations in the characteristics of the ceramics are suppressed. In particular, the container is rotated within a temperature region which is higher than the temperature used to start increasing the mechanical strength of the ceramic forms. Further, the ceramic forms can be packed into the container at a higher rate during the rotation portion of the process than during the first firing.

Abstract: By performing a debinder process before or at the time of firing, and by enhancing a programming rate in the temperature range of 650.degree..about.950.degree. C., the size of particles shows less distribution. Also, when the temperature comprising the particle growth range of 1025.degree..about.1200.degree. C. is maintained for many hours, a zinc oxide varistor having relatively large and uniformly formed particles can be provided. When a zinc oxide varistor compound is fired, a solid solution of zinc oxide spinel is fired at the programming rate of 175.degree. to 500.degree. C./hr in the temperature range comprising the primary phase of from 650.degree. to 950.degree. C., and at the programming rate of 30.degree. to 500.degree. C./hr in the range of from 1250.degree. to 1300.degree. C. Accordingly, a zinc oxide varistor having comparatively large and uniformed formed particles can be obtained. Sintered products obtained in this way show less distribution in operating voltage.

Abstract: The dielectric material includes a pre-baked powder containing Pb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3, BaTiO.sub.3, and BaZrO.sub.3, and lead oxides alone or lead oxides and copper oxides in combination. Thus, the dielectric material is sintered at low temperatures of 800.degree.-1000.degree. C., and makes it possible to use inexpensive electrode materials such as copper, silver, and silver-palladium alloy for the electrode. The dielectric material also makes it possible to produce a ceramic condenser or a thin condenser having a stable capacitance irrespective of changes in temperature.