Datasheet

Polymer Guide
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Vishay
Revision: 09-Apr-2019
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Document Number: 40076
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SOLID ELECTROLYTE POLYMER TANTALUM CAPACITORS
Solid electrolyte polymer capacitors utilize sintered tantalum pellets as anodes. Tantalum pentoxide dielectric layer is formed
on the entire surface of anode, which is further impregnated with highly conductive polymer as cathode system.
The conductive polymer layer is then coated with graphite, followed by a layer of metallic silver, which provides a conductive
surface between the capacitor element and the outer termination (lead frame or other).
Molded chip polymer tantalum capacitor encases the element in plastic resins, such as epoxy materials. After assembly, the
capacitors are tested and inspected to assure long life and reliability. It offers excellent reliability and high stability for variety of
applications in electronic devices. Usage of conductive polymer cathode system provides very low equivalent series resistance
(ESR), which makes the capacitors particularly suitable for high frequency applications.
TANTALUM CAPACITOR WITH POLYMER CATHODE TYPE T55
TANTALUM CAPACITOR WITH POLYMER CATHODE TYPE T58
Silver adhesive
Solderable cathode termination
Polymer / carbon / silver coating
Sintered tantalum pellet
Epoxy encapsulation
Lead frame welded to Ta wire
Anode polarity bar
Solderable anode termination
Anode polarity bar
Side anode termination (+)
Side cathode termination (-)
Encapsulation
Sintered tantalum pellet
Polymer / carbon / silver coating
Glass reinforced epoxy resin substrate
Bottom cathode termination (-)
Silver adhesive epoxy
Conductive strip
Rating / marking
Bottom anode termination (+)
Copper pad
Anode wire