Mitsubishi Denki Kabushiki Kaisha

Kiyoshi Hani

Yoshio Nishimoto

Takako Takei

Minekazu Kodama

Mitsuhiro Nishida

Tadatoshi Yamada

Sakuei Yamamoto

Minoru Kimura

Shigeru Kubota

Hiroshi Inao

Kiyoshi Yoshizaki

Toshimi Kawamura

Toshiyuki Sugano

Isamu Yano

Noboru Tashiro

Ichiro Yamasaki

Toshimoto Moriwaki

Shu Yamashita

Akira Fukami

Hiroshi Hishiki

Tatsushi Nakai

Shohei Eto

Naoyuki Kogure

Kazuo Kawabata

Shohei Etoh

Takahiko Watanabe

Mutsuko Hayama

Method of printed circuit board manufacture, and resulting board. A plurality of prepreg sheets composed of ceramic paper and containing different quantities of a resin are laid on each side of a core metal sheet having a through hole. A copper foil is laid on the prepreg sheets on each side of the core. All of the layers are pressed together under heat to make a metal-core printed wiring board. The prepreg sheets form an insulating layer having a high heat-dissipating capacity on each side of the core and a reliable insulator in its through hole. The ceramic paper consists essentially of short ceramic fibers having a diameter not exceeding fiber microns and a length of 5 to 500 microns, and contains 3 to 10% by weight of microfibrillated cellulose fibers as a binder for the ceramic fibers.

Metal-core printed wiring board and a process for manufacture thereof

Inorganic paper, which is made through paper-making process from a mixture consisting essentially of:

Inorganic paper and method for its manufacture

Method and apparatus for manufacturing steering wheel

A heat conductive circuit board includes an insulating layer provided on a metal substrate, and an electrically conductive metal foil formed on the insulating layer, and the insulating layer is formed by impregnating an alumina paper with organic polymer. The alumina paper is made by subjecting a material containing alumina fiber as the principal components to a paper-making process. The insulating layer has excellent properties of heat transfer not only in the thickness direction but also in the surface direction, and thus, the heat conductive circuit board is excellent in heat dissipation properties.

Heat conductive circuit board and method for manufacturing the same

A superconducting solenoid designed to improve working efficiency, heat resistance and electrical insulation of the solenoid to a practical extent. The superconducting solenoid comprises a winding frame, wires formed of filamentary conductors having superconductivity and wound around the winding frame, an insulator formed of alumina fiber material and covering each of the wires for providing electrical insulation, and a resinous material impregnated in between turns of the wires so as to provide a supporting structure. The insulator formed of alumina fiber material is in the form of a sheet, a mat or a yarn.

Superconducting solenoid having alumina fiber insulator

A laminated board lined with thermally and electrically conductive material, which comprises:

Laminated board lined with thermally and electrically conductive material

A submergible motor for use in a well of water, for example, comprises a motor winding, an insulated power supply conductor for connection to a power supply, an insulated motor conductor connected to the motor winding, and a circuit element electrically connected between the power supply and motor conductors, the circuit element being encased in a molded material in a water-resistant manner and connected to the power supply and/or motor conductors.

Submergible motor including circuit element encased in molded plug

A flame retardant liquid rubber composition comprises a hydrogenated polyhydroxybutadiene polymer and castor oil, which are modified with an isocyanate having the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 respectively represent a lower alkyl group or hydrogen atom and n is an integer of 1 to 4, and alumina hydrate and magnesium hydroxide. The castor oil can be incorporated before adding said isocyanate or can be converted into an isocyanate prepolymer by reacting with said isocyanate before the addition.

Flame retardant liquid rubber composition

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Amagasaki, Japan

Kiyoshi Hani