Why more and more people choose to use polymer capacitors

Why more and more people choose to use polymer capacitors

The basic structure of tantalum electrolytic capacitor is similar to that of aluminium electrolytic capacitor. The surface of tantalum powder as anode forms tantalum pentoxide as dielectric. The electrolyte uses manganese dioxide (solid) structure.

Ta electrolytic capacitors have the following characteristics: smaller shape than aluminium electrolytic capacitors, better frequency characteristics, and longer life (electrolytes are solid).

The electrostatic capacity of conductive polymer capacitors is rarely reduced by DC bias and temperature as in ceramic capacitors. Therefore, in this example, 10 22 F ceramic capacitors can be replaced with a 47 F conductive polymer capacitor, cutting the number of capacitors can reduce the total cost including mounting, and sometimes the mounting area.

Secondly, for the whistling of ceramic capacitors, ceramic capacitors have prepared countermeasure products. These include materials that are less distorted, LW reversal structures that reduce the length between electrodes to a shorter width, and leads that extend out metal terminals and called metal frames. These varieties are known to reduce the howling and slight vibration, but they are not completely eliminated.

In contrast, conductive polymer capacitors do not have an inverse piezoelectric effect and therefore do not howl or vibrate slightly at all. Examples of MLCC with metal terminals and screaming of conductive polymer capacitors for MLCC and countermeasure products are given below.

Polymer capacitors are laminated aluminium electrolytic capacitors with high conductivity polymer materials as cathodes, which have superior electrical performance beyond existing liquid chip aluminium electrolytic capacitors and solid chip tantalum electrolytic capacitors. The polymer capacitance is within the rated voltage range and does not need to be used for pressure reduction.