Solid tantalum capacitors were first developed by Belle Laboratories in the United States in 1956. They have excellent performance and are one of the products with small volume that can achieve large capacitance among all capacitors. Tantalum capacitors have a variety of shapes and are easily made into small and chip components suitable for surface mounting. Adapted to the needs of electronic technology automation and miniaturization development. Although tantalum raw materials are scarce and tantalum capacitors are expensive, due to the large use of high specific capacitance tantalum powder (30KuF. g-100KuF. V/g) and the improvement and improvement of capacitor manufacturing process, tantalum electrolytic capacitors have rapidly developed and their use range is becoming increasingly widespread. Tantalum capacitors are not only widely used in military communication, aerospace and other fields, but also widely used in industrial control, film and television equipment, communication instruments and other products. The production of tantalum electrolytic capacitors mainly includes three types: sintered solid, foil wound solid, and sintered liquid. Among them, sintered solid accounts for over 95% of the total production, and non-metallic sealed resin encapsulation is the main body. Under the trend of miniaturization and chip based integration with SMT technology, chip based sintered tantalum capacitors have gradually become the mainstream. The working medium of tantalum electrolytic capacitors is an extremely thin tantalum pentoxide film formed on the surface of tantalum metal. This layer of oxide film medium is completely integrated with one end of the electrode that makes up the capacitor and cannot exist alone. Therefore, the capacitance per unit volume is particularly large. The specific capacity is very high, so it is particularly suitable for miniaturization. During the working process of tantalum electrolytic capacitors, they have the ability to automatically repair or isolate defects in the oxide film, enabling the oxide film medium to be reinforced and restored to its original insulation capacity at any time, without continuous cumulative damage. This unique self-healing performance ensures its advantages of long lifespan and reliability. Tantalum electrolytic capacitors have a very high working electric field strength and are larger than any type of capacitor, ensuring their miniaturization. Tantalum electrolytic capacitors can easily obtain large capacitance and have few competitors in power filtering, AC bypass, and other applications