Matsushita Electric Industrial Co., Ltd.

Hidekazu Wada

Toshiyuki Nishimori

Nobuji Suzuki

Shigeo Okabe

Shigeo Okuno

Masahiro Kawai

Yutaka Tanaka

Kohei Shiota

Takeshi Hamabe

Hironori Yoshino

Masanori Tsuda

Kiyoshi Unami

Toshifumi Akai

Mikio Naruse

A metallized film capacitor formed by laminating or winding a metallized film 1 with metal evaporated electrode on one or both sides thereof so that a pair of metal evaporated electrodes 2 are opposite to each other, wherein electrode lead-out portions 3 are provided at both ends of the capacitor, each metal evaporated electrode is composed of a low resistance area abutting on the electrode lead-out portion and a remaining high resistance area having higher resistance than it, a split electrode pattern with a plurality of minute blocks 8 formed in a longitudinal direction and width direction and fusing areas 9 between the adjacent minute blocks is formed on at least one of the metal evaporated electrodes, and electrode partitioning lines 7 are formed at regular intervals in a longitudinal direction of the film. The metallized film is fabricated by depositing substance such as oil for preventing evaporation of metal on the evaporation side of a plastic film 10 through a rotary screen cylinder with any pattern formed by mesh processing and immediately thereafter depositing evaporated metal, thereby forming a split fuse pattern serving as a safeguard mechanism during high speed evaporation.

Device for fabricating a metalized film capacitor

A metallized film capacitor formed from a pair of metallized films. Each of the metallized films includes a dielectric film with a metal evaporated electrode formed thereon. One electrode has longitudinal electrode partitioning lines and a plurality of small blocks separated by fuse areas, while the other electrode does not. Each metallized film is formed by moving the film over a screen cylinder having a side wall with openings formed therein. A nozzle is disposed inside the screen cylinder, adjacent to the side wall. Oil is ejected from the nozzle, while the screen cylinder is rotated. The oil passes through the side wall and is deposited on the film to form a pattern thereon. Subsequently, evaporated metal is deposited on the film.

Method for fabricating a metalized film

Metallized film capacitor

A capacitor has a plastic film (4a, 4b), an aluminum deposition film (5a, 5b) formed on the plastic film (4a, 4b), and a zinc deposition film (6a, 6b) formed on the aluminum deposition film (5a, 5b) over the side of one edge part of the plastic film (4a, 4b).

Capacitor having a band of zinc and an aluminum film formed on a plastic

A capacitor has a capacitor element including a metallized film and a case for hermetically containing the capacitor element. The capacitor element has a protective mechanism for protecting it against insulation breakdown at overvoltage or thermorunaway. The capacitor also has a safety device for keeping the capacitor safe at high internal pressure due to heating. Thus, the protective mechanism and the safety device operate surely, the capacitor is protected under various severe conditions, and the life of the capacitor becomes longer.

Capacitor having a fuse and a weak member

An oil-impregnated capacitor produced by infiltrating a liquid impregnant containing at least one organometallic compound, represented by organic silane compounds, having a hydrolyzable group represented by alkoxy groups and acyloxy group and an organic functional group represented by vinyl group, epoxy group, mercapto group, methacrylo group, chlorine atom and peroxide group. It shows good characteristics when used under high stress conditions, in particular, at a high temperature and a high voltage.

Oil-impregnated capacitor

A disclosed metallized film capacitor comprises

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Tonami, Japan

Hidekazu Wada