Panasonic Intellectual Property Management Co., Ltd.

Takayuki Hiruma

Junichi Kotani

Yukio Sakai

Osamu Moriya

Hisayoshi Kato

Nobuhiro Tada

Takafumi Kashiwagi

A reactor includes a plurality of windings, a coupling core, and an inductor core. A coupling core configured to form a coupling closed magnetic circuit that magnetically couples the plurality of windings, the plurality of windings being wound around the coupling core; and. An inductor core, which includes a main part, a first projection part projecting from one end of the main part, and a second projection part projecting from another end of the main part, and each of the first projection part and the second projection part is magnetically connected to the coupling core. The inductor core forms an inductor closed magnetic circuit together with a part of the coupling core around which one winding of the plurality of windings is wound.

Reactor and power supply circuit

A module including a circuit board including an insulating layer and one or more layers of copper foil embedded in the insulating layer; an electronic component mounted on the circuit board; a sealing part sealing the electronic component on the circuit board; and a metal film covering side surfaces of the circuit board and surfaces of the sealing part. A part of the copper foil is exposed to the side surfaces of the circuit board, an exposed part of the copper foil has a width of less than 200 &#x3bc;m, and the copper foil and the metal film are electrically coupled to each other through the exposed part. Thus, occurrence of blushing, crack, or the like, can be prevented.

Module with exposed parts of copper foil and process for production thereof

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Osaka, Japan

Takayuki Hiruma