Characteristics and application of metal film capacitor

Metal film capacitors are one of the most widely used electronic components in electronic devices. They are widely used in the circuit for blocking, coupling, bypassing, filtering, tuning loops, and control.

The metal film capacitor is suitable for high frequency circuits, and in terms of structure, it can be classified into a foil type and a silver type. The silver electrode is directly deposited on the metal diaphragm by vacuum evaporation or infiltration. The temperature coefficient is greatly reduced due to the elimination of the air gap, and the stability of the metal film is higher than that of the foil. . The specific frequency characteristics are good and the Q value is high. It is widely used in high frequency electrical appliances and can be used as a standard capacitor metal film capacitor.

The metal film capacitor is formed by spraying a special mixture of a concentration suitable for spraying into a thin film, and the medium is sintered by a silver layer electrode to form a monolith structure. The utility model has the advantages of small volume, high sensitivity, low power consumption, good reliability, low cost and good frequency characteristics, so it is widely used for sounding applications of various electrical products. Commonly used as sounding devices for small electronic products such as music greeting cards, electronic watches, pocket calculators, electronic doorbells and electronic toys.

Metal film capacitors have become more and more widely used today, and are bound to become the capacitors needed for the development of various industries in the future. Therefore, it is important to understand its characteristics and applications.