Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Junji Yamane

Hiroshi Kurimoto

Koichiro Minato

Yoshihiro Watanabe

Hiroyuki Saikawa

Douyuu Hachisu

Kohei Harazono

Doyuu Hachisu

Yasuhiro Yano

Takanao Saito

An electronic component includes a lead wire, a functional element, and an outer housing. The lead wire includes a leader electrode made of metal containing aluminum, a metal wire containing tin, and a welded section formed by welding a first end of the metal wire to a first end of the leader electrode. A second end of the leader electrode is connected to the functional element. The outer housing seals the functional element therein such that a second end of the metal wire is led out therefrom. The lead wire further includes a resin film coating the welded section at least at a portion not covered with the outer housing. Resin material for the resin film has pierce strength of 0.05 MPa/&#x3bc;m per unit thickness or greater and an elastic coefficient of 10 GPa or less.

Electronic component and lead-wire for the same

A capacitor is improved in reliability by suppressing the formation of burrs or protrusions at a joint portion between an aluminum wire round rod and an external terminal in a lead wire used for a capacitor. A metal cap having a higher melting point than aluminum is fitted to an end portion of the aluminum wire round rod and the metal cap is heated, thereby joining the aluminum wire round rod to the metal cap. Thereafter, the external terminal and the metal cap are welded to each other. The metal cap has a curved surface in which an outer periphery is decreased from an opening toward an end portion opposite to the opining. The opening is provided with a stepped portion, so that the sealing degree is increased when the lead wire is inserted into a hole of the sealing member.

Capacitor lead wire, its manufacturing method, and capacitor using the same

Disclosed is an aluminum electrolytic capacitor, which comprises a capacitor element prepared by rolling an anode foil and a cathode foil together with a separator and impregnating them with a driving electrolyte, an anode lead electrically connected to the anode foil, a cathode lead electrically connected to the cathode foil, a tubular metal case having one closed end and the other open end and containing the capacitor element, and a sealing member hermetically closing the open end, wherein the anode and cathode leads are bent along an outer surface of the sealing member. In this aluminum electrolytic capacitor, the sealing member is comprised of a rubber composition containing a rubber component having, as a constituent, a butyl rubber prepared by crosslinking an isobutylene-isoprene copolymer having an unsaturation degree of 1.2 to 2.5 mol %, with an alkyl-phenol-formaldehyde resin, and 100 to 200 mass parts of reinforcing filler with respect to 100 mass parts of the rubber component. The rubber composition has a Wallace hardness according to International Rubber Hardness Degree (IRHD) of 80 Hw or more, and a tensile elastic modulus at a solder reflow temperature of 4 N/mmor more.

Aluminum electrolytic capacitor and method of producing the same

The electronic component of the present invention includes a case having an opening, an electronic component element and electrolytic solution disposed in the case, and a sealing member disposed so as to seal the opening. The sealing member has elasticity and is formed of a cross-linked structure of compound. The compound contains butyl rubber polymer as main component, phenol-based additive, and silane-based additive. Accordingly, the sealing member is improved in air-tightness, and the volatilization of the electrolytic solution becomes lessened. Further, an electronic component having such sealing member ensures excellent mounting ability. As a result, it is possible to obtain an electronic component capable of assuring excellent reliability for a long period of time even in a high temperature atmosphere and under high-temperature high humidity conditions.

Electronic component

Growing community of inventors

Yamaguchi, Japan

Junji Yamane