That’s called a ceramic capacitor
Definition
A ceramic capacitor is a ceramic capacitor that uses ceramic material as a medium and coats the ceramic surface with a layer of metal. The thin film is then sintered at high temperature and used as an electrode to form a capacitor. Usually used in high-stable oscillation circuits as loop, bypass capacitors and pad capacitors.
Classification
Ceramic capacitors are divided into high-frequency ceramics and low-frequency ceramics. Capacitors with a small positive temperature coefficient of capacitance are used in highly stable oscillation circuits as loop capacitors and pad capacitors. Low-frequency ceramic capacitors are limited to use as bypass or DC isolation in circuits with lower operating frequencies, or in situations where stability and loss requirements are not high (including high frequencies). Such capacitors should not be used in pulse circuits because they are prone to breakdown by pulse voltages.
Advantages and disadvantages
Advantages: stable, good insulation, high voltage resistance
Disadvantages: relatively small capacity
Function
MLCC (Class 1)—miniature, high frequency, ultra-low loss, low ESR, high stability, high withstand voltage, high insulation, high reliability, non-polarity, low capacitance, low cost, high temperature resistance. Mainly Used in high-frequency circuits.
MLCC (Type 2)—miniature, high specific volume, medium and high voltage, non-polar, high reliability, high temperature resistance, low ESR, low cost. Mainly used in medium and Capacitors used as DC blocking, coupling, bypass and filtering in low frequency circuits.