Aluminum electrolytic capacitors use an electrolytic process to form the dielectric. Wet electrolytic capacitors have a moist electrolyte. Dry or solid electrolytic capacitors do not. There are two ...
Note that the coatings around the tantalum core (manganese dioxide cathode, carbon, silver paint) are very thin. Solid Tantalum Capacitor Cutaway View. Image credit: ScienceDirect Wet tantalum ...