Alps Electric Co., Ltd.

Nobuyuki Suzuki

Yoshio Saito

Yoshikiyo Watanabe

Jiro Kikuchi

Satoshi Urabe

Hiroyuki Yatsu

Kiyoshi Watanabe

An electronic circuit unit contains electrodes to which bumps of a semiconductor chip are adhered. The electrodes are arranged on an upper surface of a circuit board. Land units to which chip parts is soldered are arranged on a rear surface of the circuit board. such that an insulating plate which is on the rear surface of the circuit board is supported by a supporting jig during a mounting process of the semiconductor chip, and the circuit board is not tilted. Therefore, an electronic circuit unit ensuring that the semiconductor chip is mounted with a reliable mounting capability can be obtained.

Electronic circuit unit and method of fabricating the same

Conventional portable telephones have a problem that their space factor is bad and the size thereof is increased because a transmitter/receiver unit and a battery are disposed in parallel with each other in a case formed of a lower cover and an upper cover. In a portable telephone of the present invention, the frame member of a transmitter/receiver unit is attached to a mother substrate in the state that the frame member is partly interposed between the mother substrate and a battery. With this arrangement, the space between the mother substrate and the battery can be effectively used, whereby there can be provided a small portable telephone having a good space factor.

Portable telephone

According to the electronic device of the invention, the convex parts formed on the case is inserted into the engagement holes provided on the thermal conduction member, and the front ends of the convex parts are caulked to eliminate the plays. Further, the tongue-form pieces are formed on each of the two sides parallel to each other, the clasps are formed upright on the case, and the tongue-form pieces are hooked by the lower sides of the clasps. Further, the two sides where the tongue-form pieces of the thermal conduction member are formed are provided with slits that make it easy to deflect the tongue-form pieces, which facilitates the work to hook by slanting the upper sides of the clasps on the case, and further eliminates the plays.

Electronic device

In a box-shaped molded resin body having side walls and a flat plate part in which a heat discharging plate made of a metal is embedded, a part of the heat discharging plate is exposed from a through hole in the flat plate part and the side walls, and an electronic part mounted on a printed board assembled in the molded resin body is come into contact with the heat discharging plate exposed from the through hole, thereby discharging the heat generated from the electronic part by the heat discharging plate.

Electric device

An insulation cover attached to a shield case such that the cover substantially seals the open side of the shield case without extending beyond the edge of the shield case. The cover plate is connected to the shield case by means of a series of notches and protuberances formed along the edge of the cover plate which match with holes formed in the legs of the shield case. When the cover is attached to the shield case, the circuitry inside the shield case is protected from both contaminants during installation and short circuits when installed on a mother board.

Growing community of inventors

Miyagi-ken, Japan

Nobuyuki Suzuki