Surface-mounted solid aluminum electrolytic capacitor and preparation method thereof

Abstract

The invention discloses a surface-mounted solid aluminum electrolytic capacitor and a preparation method thereof, the surface-mounted solid aluminum electrolytic capacitor comprises a plurality of stacked cores and a three-dimensional lead frame, the plurality of cores are mounted on the three-dimensional lead frame, a capacitor core package is formed between the cores and the three-dimensional lead frame, and the capacitor core package is packaged and aged to obtain a capacitor; according to the invention, the impact of the organic resin packaging material on the anode region of the core cladding in the packaging process can be reduced, and delamination is prevented; external water vapor is effectively prevented from invading a cathode region of the core cladding, and the moisture resistance of the capacitor is improved; the problem of leakage current increase caused by damage of mechanical impact to a core cladding structure in a pin forming process is solved; the length of a connecting circuit of the capacitor core and the leading-out terminal is shortened, so that the inductance of the capacitor is smaller, and the capacitor is more suitable for being used in a high-frequency environment.

Description

technical field [0001] The invention relates to the technical field of preparation of aluminum electrolytic capacitors, in particular to a surface-mounted solid aluminum electrolytic capacitor and a preparation method thereof. Background technique [0002] At present, surface mount solid aluminum electrolytic capacitors are mainly divided into two categories according to the core package structure: wound surface mount solid aluminum electrolytic capacitors and laminated solid aluminum electrolytic capacitors. Among them, the winding type surface mount solid aluminum electrolytic capacitor is affected by the structure of the core package and the way of assembly, the volume is too large and the thickness is too thick, which cannot meet the development needs of the existing electronic information industry for the miniaturization and thinning of the whole machine. The laminated solid aluminum electrolytic capacitor uses a high-conductivity polymer as the solid electrolyte and is...

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Problems solved by technology

The disadvantages of using this pin lead-out method are: 1. The anode tongue with a planar structure is used. When the number of welding layers is large, the position of the anode area of ​​the core is prone to shift during the welding process. Moreover, in the packaging process The organic resin encapsulation material is easy to squeeze in from the anode area of ​​the core, causing delamination and causing capacitor failure; 2. The lead bending process causes mechanical impact on the core package, causing the leakage current of the capacitor to increase; 3. The lead bending process During the folding process, it is easy to create a gap at the connection between the organic resin packaging material and the metal strip. When the capacitor is working, the water vapor in the environment is easy to invade the inside of the capacitor through the gap exposed to the air, especially the cathode area that is easy to absorb moisture, resulting in a deterioration of the electrical performance of the capacitor. deterioration

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