Matsushita Electric Industrial Co., Ltd.

Otowa Electric Co., Ltd.

Hideyuki Okinaka

Hideo Torii

Masaki Aoki

Atsushi Iga

Keiichi Nakao

Yasutaka Horibe

Seiichi Nakatani

Satoru Yuhaku

Yoneharu Takubo

Masayuki Sakai

Hideto Monji

Nobue Yamanishi

Eiji Fujii

Masahiro Ito

Suzushi Kimura

Yasuo Wakahata

Toru Ishida

Osamu Makino

Toshihiko Suzuki

Gen Itakura

Tatsuro Kikuchi

Satoshi Tomioka

Naoyuki Tsukamoto

Masahiro Itoh

Toru Fukada

Kiyoyuki Morita

Kouji Kawakita

Shoji Nakamura

Yasuhiko Hakotani

Kiyoshi Kuribayashi

Youichiro Yokotani

Takashi Iguchi

Hozumi Hirota

Hikoji Okuyama

Mariko Ishikawa

Yoshiyuki Miura

Akira Ohmi

Toshio Ozawa

Yasuhiro Hioki

Koji Kawakita

Seiji Gejima

Masatake Ayusawa

Toshiaki Yagami

Hiroyuki Otsuki

Masahiro Katoh

Masatugu Yamaguchi

Kenta Hiwatari

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 materialcomprises: an insulating matrixmade of a first resin material; an island-form conductive dispersed phasemade of a conductive second resin material which is incompatible with the first resin material and is more wettable to a microvaristordescribed 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 microvaristorcomprising ceramic particles having non-ohmic properties, wherein the ceramic particles are dispersed in the matrixand electrically contacted with each other via the island-form conductive dispersed phase

Resin material having non-OHMIC properties, method for producing same, and non-OHMIC resistor using said resin material

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 piecesand insulating resin are kneaded and extruded for shaping, whereby a sheet-form varistor layercan be formed where a plurality of small varistor piecesare spaced from one another and are aligned on the same plane, and the adjacent small varistor piecesare bonded via insulating resin.

Non-linear resistive element and manufacturing method thereof

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.

Ink jet device, ink jet ink, and method of manufacturing electronic component using the device and the ink

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 &#x3bc;m or more to 10 &#x3bc;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.

Method of forming an electronic component using ink

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&deg; 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. Therefore, the manufacturing yield or the performance of the product from will not be reduced.

Method and apparatus for manufacturing sinter, method for measuring concentration of plasticizer, evaluation method, and evaluation apparatus

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.

The invention relates to a method of laminating ceramic greenware sheets with electrodes embedded therein ( ) 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 ( ), 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.

Method for manufacturing laminated-ceramic electronic components

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. Then, portions of the molded bodies other than the lead wire are coated and insulated so that the zinc oxide varistor can be obtained.

Zinc oxide ceramics and method for producing the same

Electronic part and method for producing the same

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.

Furnace and method for firing ceramics

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.

Method of manufacturing zinc oxide sintered compact body

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.

Method for firing ceramic forms

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.

Dielectric material, and a condenser made from the same

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Toyonaka, Japan

Hideyuki Okinaka