The full name of the solid capacitor is a solid aluminum electrolytic capacitor, which is the highest-order product in the current capacitor product. The dielectric material of the solid capacitor is a functional conductive polymer, which can greatly improve the stability and safety of the product. With environmental protection, low impedance, high and low temperature stability, high ripple resistance and high reliability, the solid capacitor is much better than liquid aluminum capacitor. The solid capacitor has a temperature resistance of 260 degrees Celsius and good conductivity, frequency characteristics and long life. Suitable for low voltage, high current applications.
The most important basic raw material for solid capacitors is electrode foil, which is used to carry charge, accounting for 30%-70% of the capacitor’s production cost. Electrode foil production mainly undergoes two processes, namely corrosion and formation. Corrosion foil is an incomplete form of electrode foil, and then it is a finished product form of electrode foil, which is also called a chemical foil, which is directly used as a raw material of solid capacitor.
Solid-state capacitors are mainly used in routers, converters, set-top boxes, etc. in the field of network communications. For example, for a router: the solid capacitor uses a polymer dielectric. The solid particles can work normally and stably at up to 100 degrees Celsius or minus 50 degrees Celsius. Whether the particles are soaring or active, they are lower than the liquid electrolyte. Its boiling point is also as high as 350 degrees Celsius, so it is almost impossible to explode. In addition to making the router more durable and stable, the solid capacitor’s low equivalent series resistance makes the router more energy efficient and less expensive.
Many advantages compared to liquid capacitors
As one of the three passive electronic components (resistors, capacitors and inductors), capacitors play an important role in the electronic components industry and are essential electronic components in electronic circuits. Among the electronic components used in the whole machine, capacitors are the most widely used and the largest amount, accounting for about 40% of the total electronic components.
Capacitors can be classified into aluminum/tantalum electrolytic capacitors, ceramic capacitors, film capacitors, paper capacitors, mica capacitors, etc. in the form of dielectric materials, among which aluminum/tantalum electrolytic capacitors, ceramic capacitors and film capacitors account for capacitors. More than 90% of the total market.
Aluminum electrolytic capacitors can be divided into liquid aluminum electrolytic capacitors and solid aluminum electrolytic capacitors from different electrolytes. Liquid aluminum electrolytic capacitors can be divided into lead type, soldering piece, soldering pin type and bolt type according to different extraction methods.
The solid aluminum capacitor replaces the electrolyte with a conductive polymer material with high conductivity and good thermal stability. Compared with ordinary liquid aluminum electrolytic capacitors, it has high reliability, long service life, high frequency, low impedance, and resistance to extra large ripple current. The characteristics are favorable for the integration and miniaturization of electronic products and can overcome the drawbacks of liquid aluminum electrolytic capacitors being easy to leak. In the context of the effective cost reduction of solid aluminum electrolytic capacitors, the application of solid aluminum electrolytic capacitors in the future should be more and more.
Solid capacitor industry technology development trend
The development trend of miniaturization and light weight of electronic equipment puts forward higher requirements on the performance of solid capacitors. The main technical development trends include: high temperature resistance, long life, high reliability; chip, miniaturization; environmental protection. The high specific volume and high voltage of the electrode foil are the development direction.
Post time: Dec-28-2018