Matsushita Electric Industrial Co., Ltd.

Diafoil Hoechst Company, Limited

Hisayoshi Watanabe

Takaaki Higashida

Daisuke Suetsugu

Kenichi Yamamoto

Munekazu Nishihara

Takashi Imanaka

Shin-ichi Kinoshita

Hirotaka Hisamura

Nobuyuki Kume

Shinsuke Itoi

Jun Katsube

Osamu Sengoku

Toru Uchida

A capacitor ( ) using a flexible substrate ( ) includes a hole portion ( ) formed in a dielectric ( ) to connect an upper electrode ( ) to an external leader electrode ( ). At least part of the hole portion ( ) extends from its lower end to upper end at an inclination between 0.1 and 20&deg; with respect to a top surface of the external leader electrode ( ). Then, an upper end corner of an inclined wall surface of the upper electrode ( ), which inclines along the hole portion ( ) of the dielectric ( ), has a downward inclination between 0.1 and 20&deg;. A lower end corner of the inclined wall surface of the upper electrode ( ), which inclines along the hole portion of the dielectric ( ), has an upward inclination between 0.1 and 20&deg;. As a result, stress concentration on the corners of the upper electrode ( ) is drastically reduced to prevent the upper electrode ( ) from cracking.

Capacitor and manufacturing method thereof

A metal-deposited polyester film capacitor made of a laminated or wound metal-deposited polyester film which has, on at least one of its surface, a coating layer containing an aromatic polyurethane and a deposited metal layer on the coating layer, which is excellent in moist-heat resistance and has good long-term reliability.

Metal-deposited polyester film capacitor

Growing community of inventors

Osaka, Japan

Hisayoshi Watanabe