Murata Manufacturing Co., Ltd.

Kenichi Oshiumi

Koji Fujimoto

Kazutoyo Horio

Satoshi Tani

Shinji Otani

Yoshinori Ueda

Tomohiro Suzuki

Junichi Sato

Keiji Yoshida

Shinya Yoshida

Tadahisa Sano

Tsuyoshi Yamamoto

Hiroyuki Demizu

Kenichi Kawasaki

Noriyuki Inoue

Yasuhiro Tamatani

Katsutomo Aritomi

Akira Saito

Makito Nakano

Junichi Kasuya

A solid electrolytic capacitor that includes a resin molding including: a capacitor element laminate, the capacitor element laminate including a first layer and a second layer that are laminated together, the first layer includes a valve-action metal substrate exposed at a first end surface of the resin molding, the second layer includes an electrode lead-out layer exposed at a second end surface of the resin molding; an insulating substrate; and a sealing resin enclosing the capacitor element laminate; a first external electrode on a first end surface of the resin molding and connected to the valve-action metal substrate; a second external electrode on a second end surface of the resin molding and connected to the electrode lead-out layer; and a dummy layer not contributing to a capacity of the capacitor on a main surface of the capacitor element laminate in a lamination direction thereof and adjacent to the insulating substrate.

Solid electrolytic capacitor

A solid electrolytic capacitor that includes a resin molding, a first external electrode, and a second external electrode. The resin molding includes a laminate of multiple capacitor elements, and a sealing resin sealing the laminate. The following are satisfied: t<t, t<t, t<t, and t/t<t/t, where tis the thickness of an inner portion of the cathode lead-out layer, the inner portion not being exposed at the second end surface; tis the thickness of an exposed portion of the cathode lead-out layer, the exposed portion being exposed at the second end surface; tis the thickness of an inner portion of the valve-action metal substrate, the inner portion not being exposed at the first end surface; and tis the thickness of an exposed portion of the valve-action metal substrate, the exposed portion being exposed at the first end surface.

Capacitor

A solid electrolytic capacitor that includes a plurality of capacitor elements each including an anode portion, a dielectric layer, and a cathode portion having a solid electrolyte layer and a current collector layer; a leading conductor layer; an insulating resin body; a first external electrode; and a second external electrode. The plurality of capacitor elements are stacked in layers, with mutually adjacent capacitor elements having their respective current collector layers connected to each other. The current collector layer of only the capacitor element adjacent to the leading conductor layer is connected to the leading conductor layer. The first external electrode is connected to the leading conductor layer at the first end surface.

A solid electrolytic capacitor that includes a capacitor element including an anode portion having a metal layer, a dielectric layer, and a cathode portion having a solid electrolyte layer and a current collector layer; a leading conductor layer; an insulating resin body covering the capacitor element and the leading conductor layer, the insulating resin body having a first end surface and a second end surface opposite to each other; a first external electrode; and a second external electrode. The first external electrode has at least one plating layer on the first end surface, and is connected to the leading conductor layer at the first end surface. The second external electrode has at least one plating layer on the second end surface, and is connected to the metal layer at the second end surface.

A multilayer capacitor includes a capacitor body in which internal electrodes in a first internal electrode group are overlapped with internal electrodes in a second internal electrode group with dielectric layers sandwiched therebetween. A first external electrode has a first wraparound portion and a second wraparound portion, and a second external electrode has a third wraparound portion and a fourth wraparound portion. The volume proportions of the effective layers in a first area sandwiched between the first wraparound portion and the second wraparound portion and in a third area sandwiched between the third wraparound portion and the fourth wraparound portion are set to at least about 10%. The volume proportions of the effective layers in a second area toward a lower surface in the first area and in a fourth area toward the lower surface in the third area are set to about 15% or less. The external dimensions of the multilayer capacitorare about 1.6&#xb1;0.1 mm in length by about 0.8&#xb1;0.1 mm in width by about 0.8&#xb1;0.1 mm in thickness.

Multilayer capacitor

Growing community of inventors

Nagaokakyo, Japan

Kenichi Oshiumi