The main difference between solid-state capacitors and aluminum electrolytic capacitors

The full name of solid capacitors is conductive polymer aluminum electrolytic capacitors , also known as polymer aluminum capacitors. The stability and safety are quite different from liquid aluminum electrolytic capacitors in the cathode material used. In the past, the cathode material used in aluminum electrolytic capacitors was electrolyte, while solid capacitors were conductive polymer materials. , Common conductive polymers are PPY, PEDH. Solid capacitors are highly valued by Intel and motherboard manufacturers, so what are the advantages of solid capacitors compared to previous electrolytic capacitors?

      As the frequency of PC is getting higher and higher in recent years, the power consumption is increasing, which requires higher and higher requirements for the capacitor of the power supply part of CPU\Memory\PCI EXPressdevices. However, no matter how low the impedance is, the traditional liquid aluminum electrolytic capacitor will still generate heat. When the temperature rises to a certain level, the internal vapor pressure of the capacitor will increase. At this time, the capacitor function of filtering and voltage stabilization will also continue to decline, and even due to the continuous rise of temperature, the condition of bulging and leakage will occur (generally what we call "capacitor bursting"), which is often caused by faulty parallel capacitors. The motherboard is not functioning properly, or even completely inoperable and needs to be sent for repair.

      Solid-state capacitors use conductive polymer materials with high conductivity and excellent thermal stability as solid electrolytes, replacing the electrolyte in traditional aluminum electrolytic capacitors , greatly improving the defects of traditional liquid aluminum electrolytic capacitors and showing excellent electrical properties. And reliability, conductive polymer aluminum solid electrolytic capacitors have become the mainstream of the development of the next generation of solid electrolytic capacitors. It moves slowly in the middle (high impedance), which leads to the fact that the conductive polymer has a better conductivity index than the liquid electrolyte, and the conductivity index of the conductive polymer can reach thousands or even tens of thousands of times that of the liquid electrolyte! Solid state Capacitors show lower impedance at high frequencies. Low impedance means low resistance loss, and it will not consume power and convert it into heat, so it will not cause the temperature to rise, and it will not degrade the capacitor, which can make the system more stable.

      It is precisely because of these excellent characteristics of solid-state capacitors that they are favored by the majority of motherboard manufacturers and become one of the necessary materials on today's high-end motherboards.