Novel high-voltage super capacitor based on doped PN region and high dielectric constant layer

Abstract

The invention discloses a novel high-voltage super capacitor based on a doped PN region and a high dielectric constant layer. The capacitor comprises two electrodes, a dielectric layer is arranged between the two electrodes, and the dielectric layer is sequentially provided with an N-type doped dielectric layer, an insulating ceramic layer made of a high dielectric constant material and a P-type doped dielectric layer, the PN region is prepared by performing triple diffusion process doping on a lightly doped silicon wafer, and the doping concentration of the N-type doped dielectric layer and the P-type doped dielectric layer is gradually reduced from the heavy doping concentration in the direction from the electrode to the insulating ceramic layer. According to the invention, heavily doping is carried out on the PN region with larger layer thickness through a triple diffusion technology, a large-scale space charge region is formed, a traditional capacitor charge distribution mode is changed, distribution of body charges is realized, the distribution of the body charges can be designed by changing the doping concentration of the PN region, so that the capacitor has larger high-voltage charge capacity, and the capacitance value of the farad level is realized.

Description

technical field [0001] The invention relates to the field of capacitor technology, in particular to a novel high-voltage supercapacitor based on a doped PN region and a high dielectric constant layer. Background technique [0002] With the rapid development of the electronics industry, it is urgent to develop high-voltage ceramic capacitors with high breakdown voltage, low loss, small size and high reliability. Over the past 20 years, the high-voltage ceramic capacitors successfully developed at home and abroad have been widely used in power systems, laser power supplies, video tape recorders, color TVs, electron microscopes, copiers, office automation equipment, aerospace, missiles, and navigation. [0003] At present, high-voltage ceramic capacitors are usually implemented in the form of plate capacitors, and a dielectric layer is added between the two electrodes to store charge and energy. Among them, increasing the dielectric constant of the dielectric layer is one of t...

AI Technical Summary

Problems solved by technology

Among them, increasing the dielectric constant of the dielectric layer is one of the ways to increase the capacitance value. For example, using barium titanate-based ceramic materials as the dielectric layer, but the simple application of these ceramic materials is still limited in improving the capacitance value. It is far from enough for electric vehicles with energy storage capacity and future large-capacity energy storage

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