​How to remove solid state capacitance? What is it? Solid state capacitor is called solid aluminum electrolytic capacitor. It is different from ordinary capacitors (liquid aluminum electrolytic capacitors) in that it uses different dielectric materials. The dielectric material of liquid aluminum capacitors is electrolyte, while the dielectric material of solid capacitors is conductive polymer.

Due to many problems of liquid electrolytic capacitor, solid aluminum electrolytic capacitor came into being. Since 1990s, aluminum electrolytic capacitors have made innovative development by using solid conductive polymer materials instead of electrolyte as cathode. The conductivity of conductive polymer materials is usually 2-3 orders of magnitude higher than that of electrolyte. The application of conductive polymer materials in aluminum electrolytic capacitors can greatly reduce ESR and improve temperature frequency characteristics.

Due to the good machinability and easy encapsulation of polymer materials, the chip development of aluminum electrolytic capacitors has been greatly promoted. At present, there are two kinds of commercial solid-state aluminum electrolytic capacitors: organic semiconductor aluminum electrolytic capacitor (OS-CON) and polymer conductor aluminum electrolytic capacitor (PC-CON).

The structure of organic semiconductor aluminum electrolytic capacitors is similar to that of liquid aluminum electrolytic capacitors, and most of them adopt in-line vertical packaging. Different from the cathode material of solid aluminum polymer electrolytic capacitor, the solid organic semiconductor extract is used to replace the electrolyte, which can improve the electrical performance and effectively solve the problems of electrolyte evaporation, leakage and flammability.

Solid aluminum polymer chip capacitor is a unique structure which combines the characteristics of aluminum electrolytic capacitor and tantalum capacitor. Like liquid aluminum electrolytic capacitors, solid aluminum polymers are mostly in the form of patches. The polymer film with high conductivity is deposited on alumina as cathode and carbon and silver as lead out electrode, which is similar to the structure of solid tantalum electrolytic capacitor.