Murata Manufacturing Co., Ltd.

Masahiro Nishio

Kazuhiro Yoshida

Shigeki Nishiyama

Nobushige Moriwaki

Kazuyuki Kubota

A ceramic condenser module includes at least one first multi-layered ceramic condenser and at least one second multi-layered ceramic condenser, which are mounted to a front surface and a back surface of a substrate, respectively. When a total surface area of the outside surfaces of the mounted first and second multi-layered ceramic condensers excluding surfaces thereof opposing the substrate is defined as S , and a total equal to S and a surface area of the outside surface of the substrate excluding the area covered by the first and second multi-layered ceramic condensers is defined as S , S is equal to or greater than about 1.3 times S . With this arrangement, the ceramic condenser module is suitable for use with large amounts of current, has excellent heat-dissipation effect, is much smaller and much less expensive.

Ceramic condenser module

An inverter capacitor module includes a plurality of substrates having a plurality of ceramic capacitors provided on the top surfaces thereof, and first and second feeding unit lands having conductive films provided on both surfaces thereof and arranged to feed the plurality of ceramic capacitors, the first and second feeding unit lands on both surfaces thereof being electrically connected to each other, a conductive spacer inserted between the plurality of substrates for establishing one of an electrical connection between the first feeding unit lands of an underlying substrate and its overlying substrate and an electrical connection between the second feeding unit lands of an underlying substrate and its overlying substrate, a fixing member arranged to fix the plurality of substrates laminated via the conductive spacer, and a switching module fixed below the bottom substrate among the plurality of substrates that are laminated. In the inverter capacitance module, the switching module is fixed to the plurality of substrates by the fixing element.

Growing community of inventors

Izumo, Japan

Masahiro Nishio