Matsushita Electric Industrial Co., Ltd.

Sankichi Shida

Tsunehiko Todoroki

Hyogo Hirohata

Katsuhiko Honjo

Koji Hashimoto

Shinji Okuma

Yasuhiro Ogawa

Hiromasa Yamamoto

Mashiro Oita

A method of manufacturing a chip coil, including a coil element which includes a magnetic core, a winding wire, and internal terminal electrodes, a fired mass of magnetic material surrounding and encapsulating the coil element, and external terminal electrodes electrically connected to the internal terminal electrodes. The winding wire is coated with a heat-resistive electrically insulating film and is wound around the magnetic core. The internal terminal electrodes are electrically connected to opposite ends of the winding wire and are exposed to the exterior of the mass at opposite ends of the core where they are electrically connected to the external terminal electrodes.

Method of manufacturing a chip coil

Disclosed herein is a conductive paste useful for making conductors, including microcircuit conductors, and terminations for capacitors, resistors and piezo-electric transducer elements. The paste comprises an inert liquid vehicle having a metal powder and a glass powder both dispersed therein and is printed and fired in the conventional manner on dielectric substrates. The metal powder comprises an alloy powder, each particle comprising Cu, Al, and at least one of Zn and Ag. The first film of the paste is practically resistant to corrosion and practically conductive and the paste can be produced economically.

Conductive paste

An electrical contact material comprising silver, bismuth oxide and tin oxide with or without tin metal, wherein the amounts of the bismuth and the tin on the basis of the sum weight of the metals in both the metal component and in the metal oxide component are 1.5 to 6 weight percent and 0.1 to 6 weight percent, respectively. This electrical contact material has high resistance to both welding and arc erosion. An advantageous method of making the electrical contact material comprises preparing a metal alloy composed of all the above metals in the above weight ratio and internally oxidizing the bismuth completely in the alloy after shaping the alloy to a desired electrical contact material shape or after crushing the alloy to scaly flakes.

Electrical contact material and method of making the same

A connector which has bellows type contacts of spring metal and a holder which has a bottom, a longitudinal slot for receiving a circuit panel, a cavity for housing the bellows type contact, a hollow formed at upper portion of the cavity and partition wall for separating the adjacent contacts. The bellows type contact consists of a lower end portion, an attached portion, a first bent portion, a second bent portion, a straight portion, a third bent portion and an upper end portion. The straight portion is the portion contacting the panel circuit. The contact has a spring substrate which consists of phosphor bronze, a contact metal of tin or tin-lead alloy, and a layer of copper between the substrate and the contact metal. With the improved shape and material of the contact, there is provided better contact performance even for a contact of tin or tin-lead alloy which is very cheap compared to the conventional gold contact and it is thus advantageous for use in consumer type electric equipment.

Receptacle for printed circuit board

A clad wire for an electric contact is made by sofening a clad tape, which consists of at least a base metal and a surface layer of noble metal, by annealing, forming the softened clad tape into a cross sectional form of a circular arc, and cold-drawing the formed clad tape through a die having a desired cross sectional shape so as to provide a clad wire.

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Nara, Japan

Sankichi Shida