Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Hiroshi Serikawa

Tsuyoshi Yoshino

Junichi Kurita

Kenji Kuranuki

Hiroshi Fujii

Tatsuo Fujii

Kazuo Kawahito

Katsuyuki Nakamura

Kazuo Tadanobu

Yuji Midou

Takashi Iwakiri

Hirotoshi Toji

A digital signal processor includes a component for processing a digital signal, a power line for supplying a power to the component, and a decoupling capacitor connected between the power line and a ground. The decoupling capacitor has an equivalent series resistance larger than zero and not larger than 25 m&#x3a9; at 100 kHz and an equivalent series inductance larger than zero and not larger than 800 pH at 500 MHz. This digital signal processor does not generate a lot of digital noise, and has a small, thin size.

Digital signal processor

A solid electrolytic capacitor includes a planar solid electrolytic capacitor element having anode and cathode portions; anode and cathode terminals; and insulating coating resin. The anode terminal is electrically connected at the top surface thereof to the anode portion. The cathode terminal is electrically connected at the top surface side thereof to the cathode portion. The coating resin integrally coats the capacitor element so as to expose the bottom surfaces of the anode and cathode terminals. The anode and cathode terminals are disposed as close to each other as not more than 3 mm. The anode and cathode terminals have stair steps on both sides thereof and are connected to the anode and cathode portions at joint faces, respectively. The anode joint faces and the cathode joint faces are coated with coating resin. The solid electrolytic capacitor is provided with the anode joint faces and/or the cathode joint faces.

Solid-electrolyte capacitor, manufacturing method thereof, and digital signal processing substrate using the solid-electrolyte capacitor

A solid electrolytic capacitor includes a flat-shaped anode terminal having a first surface connected to an anode portion of a capacitor element and having a second surface opposite to the first surface, a flat-shaped cathode terminal having a first surface connected to a cathode layer of the capacitor element and having a second surface opposite to the first surface thereof, and an insulating resin package accommodating the capacitor element, the anode terminal, and the cathode terminal. The second surface of the cathode terminal is flush with the second surface of the anode terminal. The second surface of the anode terminal and the second surface of the cathode terminal expose to an outside of the resin package. The anode terminal includes a first thick portion and a first thin portion thinner than the first thick portion. The first thick portion has the second surface of the anode terminal and a portion of the first surface of the anode terminal. The first thin portion has a portion of the first surface of the anode terminal and being connected to the first thick portion. The cathode terminal includes a second thick portion and a second thin portion thinner than the second thick portion. The second thick portion has the second surface of the cathode terminal and a portion of the first surface of the cathode terminal. The second thin portion has a portion of the first surface and being connected to the second thick portion. This solid electrolytic capacitor has a small equivalent series inductance, and is stably mountable to a mount body.

Solid-state electrolytic capacitor and manufacturing method thereof

Growing community of inventors

Osaka, Japan

Hiroshi Serikawa