High reliability ceramic capacitor (I)

Foreword:

What is ceramic? All kinds of clays made of clay and china clay are used as raw materials. The utensils made by the processes of compounding, forming, drying and roasting can be called ceramics. As the name implies, ceramic capacitors are also made by the same principle. The ceramic dielectric film printed by the electrode (internal electrode) is superposed in a dislocation manner, and a ceramic chip is formed by one-time high-temperature sintering, and then a metal layer (outer electrode) is sealed on both ends of the chip to form a similar Monolithic structure, it is also called monolithic capacitor. It is well known that ceramics are brittle and crack. So how do you make ceramic capacitors highly reliable?

Ceramic capacitor structure:

The ceramic capacitor is mainly composed of two parts, a ceramic capacitor body and an external electrode. The body part is composed of an internal electrode and a dielectric layer, which is a key part of the storage energy of the ceramic capacitor, and is also the most vulnerable part. If it is accidentally subjected to external impact or internal stress, it will crack or break, causing the ceramic capacitor to fail. If the board function is invalid, the board will be burned. Since the failure mode of the ceramic capacitor is a short circuit, the current on the capacitor will increase instantaneously for any reason, and a large amount of heat will be generated, causing a fire.