Nec Corporation

Nec Tokin Corporation

Kazumasa Ohya

Takayuki Inoi

Satoshi Arai

Yoshihiko Saiki

Masahiro Miyauchi

Masako Inagawa

Kiyotaka Hamada

Kiyotak Hamada

In an electronic device supplying a DC power to an LSI chip ( ), a noise filter ( ) of a distributed constant type, having an input port ( ) and an output port ( ), is mounted on a circuit board ( ). The noise filter ( ) reduces high-frequency noise incoming thereto and allows DC current to flow therethrough. The input port ( ) is connected to a DC power line ( ) and a ground conductor ( ) on the circuit board ( ). The output port ( ) is connected to a separate power conductor ( ) and a separate ground conductor ( ) which are connected to the LSI ( ) mounted on the circuit board ( ). In another embodiment, the LSI ( ) is mounted on a different circuit board ( ) to which the output port ( ) is connected through conductor pins ( ) standing on the circuit board ( ).

Electronic device for supplying DC power and having noise filter mounted with excellent noise reduction

A solid electrolytic capacitor has an anode terminal and a cathode terminal for external electrical connection that are formed on one surface of a plate-like or foil-like anode member, and a cathode conductor layer formed such that it covers the area of the one surface of the anode member except for the portion where the anode terminal is secured. A first metal plate or metal foil functioning as the cathode terminal is closely joined to the one surface of the cathode conductor layer so as to cover the one surface of the cathode conductor layer. A second metal plate or metal foil is closely joined to the other surface of the cathode conductor layer so as to cover the other main surface of the cathode conductor layer. The first metal plate or metal foil and the second metal plate or metal foil function to intercept the ventilation between the anode member and the outside.

Solid electrolytic capacitor and manufacturing method for the same

After forming a cavity in a laminated body of a plurality of piezoelectric ceramic films and internal electrodes, an insulator is formed on the end faces of the internal electrodes exposed on the wall surface of the cavity by electrophoretic process. According to this method, an insulator can be formed more inexpensively, in larger quantity, and with higher reliability than by the conventional method using a low pressure CVD method.

Method of manufacturing laminated piezoelectric actuator having cavity

Strain gages (81, 82, 83) are adhered to protective layers (31, 32) and an active portion (2) of a laminated-structure (10) of the piezoelectric actuator, respectively. Since it is possible to measure a total amount of displacement of the protective layers (31, 32) and the active portion (2), the measured amount of displacement of the laminated structure (10) is accurate even if there are difference in strain due to temperature and stress between them. The same effect can be obtained for such actuator whose laminated structure (10) further includes any member such as temperature compensating member (19) of metal whose elastic modulus is different from that of the laminated structure.

Piezoelectric actuator having strain gage

Piezoelectric actuator

In order to make uniform and smooth elongation of a piezoelectric actuator at the end faces thereof, at least one piezoelectric active layer with at least one non-conductive area formed at the central portion thereof is arranged between an inactive layer and an extreme piezoelectric active layer of the element.

Growing community of inventors

Tokyo, Japan

Kazumasa Ohya