Solid tantalum capacitor with extremely low ESR value and leading-out welding sheet at gold plating end

A tantalum capacitor, extremely low technology, applied in the field of solid tantalum capacitors with gold-plated terminals with extremely low ESR values, which can solve the problems of reducing the electrical performance of tantalum capacitors and large contact resistance, achieving lower ESR values, lower contact resistance, and increased The effect of conductivity

CN108054016AInactive Publication Date: 2018-05-18株洲中电电容器有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-05-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a solid tantalum capacitor with an extremely low ESR value and a leading-out welding sheet at a gold plating end. The solid tantalum capacitor comprises a tantalum core and a tantalum wire, wherein an epoxy resin encapsulation layer wraps the tantalum core, a positive electrode gold plating cap and a negative electrode gold plating cap are respectively arranged at two endsof the encapsulation layer, the negative electrode gold plating cap is arranged at an opening end of the encapsulation layer, and the negative electrode gold plating cap and the tantalum core are connected by a surface welding mode. Spot welding between an existing wire and the tantalum wire is changed to contact surface welding, and the ESR value of the tantalum capacitor can be effectively reduced by large-area welding; and moreover, existing positive / negative pole plate tin plating is changed to gold plating cap leading out, the conductivity of a welding position can be greatly improved, and the contact resistance of the tantalum capacitor on a circuit board also can be greatly reduced.
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Description

technical field

[0001] The invention relates to a tantalum capacitor, in particular to a solid tantalum capacitor with an extremely low ESR value and a gold-plated terminal leading out solder tabs. Background technique

[0002] Solid tantalum capacitor is a solid capacitor made of metal tantalum without electrolyte. Because it uses metal tantalum as the medium, it can adapt to high temperature working environment, and the tantalum capacitor has automatic repair or isolation oxide film during operation. The performance of the defects in the oxide film enables the oxide film medium to be strengthened and restore its proper insulation ability at any time without being continuously and cumulatively damaged. This unique self-healing performance ensures its long life and reliability. , Tantalum capacitors have a very high working electric field strength, and have the characteristics of excellent performance and small size. Therefore, tantalum capacitors have been developed rapidly...

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Embodiment Construction

[0016] In order to facilitate the understanding of the present invention, the present invention will be described more fully and in detail below in conjunction with the accompanying drawings and preferred embodiments, but the protection scope of the present invention is not limited to the following specific embodiments.

[0017] Such as figure 1 As shown, the solid tantalum capacitor with a gold-plated terminal with an extremely low ESR value in this embodiment leads to a solder tab, and includes a tantalum core 1 and a tantalum wire 2. Both ends of the positive electrode gold-plated cap 4 and the negative electrode gold-plated cap 5 are respectively provided, wherein the negative electrode gold-plated cap 5 is located at the opening end of the encapsulation layer 3, and the negative electrode gold-plated cap 5 and the tantalum core 1 are connected by surface welding.

[0018] In this embodiment, the tantalum wire 2 vertically protrudes from the positive gold-plated cap 4 and ...