Matsushita Electric Industrial Co., Ltd.

Tanejiro Ikeda

Tadashi Kimura

Kunio Oshima

Hitoshi Yamanishi

Isamu Aokura

Koichi Kawata

Youichi Ohnishi

Hisaaki Tachihara

Shoji Hara

Shinsuke Itoi

Minoru Kikuchi

Kaname Nakao

A sputtering apparatus for performing sputtering operation by using a rectangular target made of ferromagnetic material, the apparatus includes an electrode in which one first permanent magnet is disposed on each side edge of a front surface of the target, polarities of the first magnets confronting each other with the target interposed between the first magnets are opposite to each other, one second permanent magnet is disposed on each side edge of a rear surface of the target, polarities of the second magnets confronting each other with the target interposed between the second magnets are opposite to each other, and the polarity of each second magnet disposed on the rear surface of the target is the same as that of the first magnet disposed on the front surface of the target.

Sputtering apparatus

In manufacturing a film capacitor, an etching of laminated or stacked film capacitor body for making electrode connection is made by a two-stage application of radio frequency power, wherein a first stage application is at a larger power and a second stage application is at a smaller power of the radio frequency.

Method for manufacturing a film capacitor

A film capacitor which has a plurality of electrodes; at least one layer of dielectric member made of organic material and interposed between each pair of neighboring electrodes; impreganated members made of organic material and disposed in a gap between the electrode and the dielectric layer or between the dielectric layers; and end electrodes applied respectively to opposite electrode drawout end faces and connected alternately with the electrodes. The dielectric layers and the impregnated members alternate with each other and have respective end faces. The end portions of the dielectric layers and impregnated members are indented to provide respective indented end face.

Film capacitor and method of making the same

A film capacitor having metallic layer electrodes, organic dielectric films interposed between the metallic layer electrodes, and a pair of end surface electrodes disposed at the opposite ends of the capacitor and alternately connected to the metallic layer electrodes. The end surfaces of the dielectric films adjacent to each other and located at the opposite end surfaces of the capacitor are formed with irregularities. This capacitor is manufactured by a method including: the steps of preparing a lamination or roll of a plurality of electrodes and organic dielectric films interposed between the electrodes, selectively removing portions of the dielectric films at the electrode-lead-out-end sides of the roll or lamination where end surfaces of the dielectric films are flush with those of the electrodes by bringing surfaces of the roll or lamination at the electrode-lead-out-end sides in contact with a gas having at least a component reactive with the organic dielectric; and forming end-surface electrodes at the electrode-lead-out-end sides.

Film capacitor, method of and apparatus for manufacturing the same

The present invention discloses a film capacitor and a method for making the same. A capacitor element formed by rolling or laminating metalized films less than 3.5 microns in thickness has ends coated with ion plating to form block terminals so that the strong bonds between the ends of the capacitor element and the terminals may be obtained with the resultant decrease in contact resistance therebetween. In order to increase the mechanical strength of the terminals a conducting layer may be formed on the terminals by metal spraying, and in order to increase the bond the ends of the capacitor element may be subjected to etching prior to ion plating so that the roughed end faces offer teeth to which the metal terminals cling. Thus the present invention provides a film capacitor which is considerably compact in size, light in weight yet highly reliable and dependable in operation and inexpensive to manufacture.

Growing community of inventors

Nara, Japan

Tanejiro Ikeda