Taiyo Yuden Co., Ltd.

Hideo Ishihara

Yuichi Sasajima

Kunihiko Nakajima

Nobuhiro Sasaki

Katsunosuke Haga

Kazuya Ishikawa

An embodiment of an multilayer ceramic capacitor with interposer includes: an interposerhaving an insulated substrate, two first conductor pads, two second conductor padsand two conductor viasconnecting the first conductor padsand second conductor pads; and a multilayer ceramic capacitorhaving external electrodesthat are each connected to each first conductor padof the interposervia solder SOL. Each conductor viaof the interposerhas a through holeinside, and a void GA not filled with the solder SOL is present in each through holeon the second conductor padside. The multilayer ceramic capacitor with interposer is capable of suppressing noise due to electrostriction.

Multilayer ceramic capacitor with interposer, and interposer for multilayer ceramic capacitor

An inexpensive variable inductor has inductance value continuously changeable without reducing a Q value. When a control voltage is applied to a control terminal of a MOS transistor from a power supply, a continuity region is formed in a channel, and a region between main terminals becomes conductive. When the control voltage is changed, length of the continuity region in the channel is changed. This changes length of a path area of an induced current, flowing in an induced current film. Thus, the amount of induced current is increased or decreased. Therefore, when the control voltage of the MOS transistor is changed, the inductance value of the coil is continuously changed.

Switching element, variable inductor, and electronic circuit device having circuit configuration incorporating the switching element and the variable inductor

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Gunma, Japan

Hideo Ishihara