Matsushita Electric Industrial Co., Ltd.

Fumiaki Hashimoto

Masaki Suzumura

Koji Nakashima

Hideki Okura

Etsuo Tsujimoto

Tomio Marui

Satoru Taniguchi

Makoto Ono

Naoki Hashimoto

Satoru Inaba

Tsukasa Suzuki

A multilayered coil is formed by inserting insulating paperhaving either a pressure sensitive adhesive or an adhesive disposed on both faces thereof into at least one place between thin coil layers and then magnetic coresare mounted to the multilayered coil from above and below. Thus, a thin transformer for a switching power supply is provided, in which variation in distance between coiland coil, of which one is disposed over the other, variation in distance of coiland coilfrom magnetic coreand the like are suppressed.

Low-profile transformer and method of manufacturing the transformer

A circuit board comprising a composite resin and a metal plate, the metal plate forming circuit patterns. The composite resin comprises 70-95 parts by weight of inorganic filler, and 5-30 parts by weight of a resin composition including a thermosetting resin and a hardener. The metal plate is surface treated to reinforce the adhesion at least at one surface contacting with the composite resin. The composite resin fills spaces between the circuit patterns, and the composite resin composition and the metal plate form a plane at a side of the metal plate for mounting components. Since the resin composition including the inorganic filler is also present in the spaces between circuit patterns of a metal plate, heat dissipation characteristic of the circuit board is extremely high, and is suited for electronic apparatus containing heat generating parts such as power circuit.

Circuit board and method for manufacturing the same, and electronic apparatus comprising it

Self oscillating power supply

Growing community of inventors

Matsusaka, Japan

Fumiaki Hashimoto