There are three main types of tantalum electrolytic capacitor  type: sintered solids, foil-wound solids, and sintered liquids. Among them, sintered solids account for more than 95% of the total production, and the main type is non-metallic sealed resin encapsulation. . The miniaturization and chip-type cooperation with SMT technology are under development. The type of chip sintered tantalum electrolytic capacitor type has gradually become the mainstream.
Solid tantalum capacitors have excellent electrical properties, a wide operating temperature range, diverse forms, excellent volumetric efficiency, and their unique characteristics:
       The working medium of a tantalum electrolytic capacitor is an extremely thin tantalum pentoxide film formed on the surface of tantalum metal.
       The oxide film dielectric of this layer is completely integrated with one end of the capacitor, and cannot exist alone. Therefore, the electric capacity per unit volume is particularly large. That is, the specific capacity is very high, so it is particularly suitable for miniaturization.
         In the working process of tantalum electrolytic capacitors, it has the performance of automatically repairing or isolating the defects in the oxide film, so that the oxide film medium can be strengthened at any time and restore its proper insulation capacity, without being subject to continuous cumulative damage. This unique self-healing performance guarantees its advantages of long life and reliability.
      Sintered liquids are common in high-reliability military equipment, and the casing is made of pure silver.