How to choose multilayer chip ceramic capacitors?

Multilayer chip ceramic capacitors are a common electronic component, mainly used for coupling, winding and filtering functions in circuits. It has the advantages of small size, large capacity, and good high-frequency characteristics, and is widely used in modern electronic equipment.

Characteristics of multilayer chip ceramic capacitors

1. Small size, large capacity

Multilayer chip ceramic capacitors are relatively small and can provide large capacitance values in a limited space. This makes it ideal for space saving in modern electronic devices.

2. Good high frequency characteristics

Multilayer chip ceramic capacitors provide excellent performance in the high frequency range, enabling fast response and low losses. Its low equivalent series resistance (ESR) and low equivalent series inductance (ESL) make it suitable for high frequency filtering and coupling applications.

3. High temperature resistance and moisture resistance

Multilayer chip ceramic capacitors have good high temperature stability and moisture resistance, and can work in harsh environmental conditions. This makes it widely used in automotive electronics, aerospace and other fields.

4. Excellent temperature characteristics

Multilayer chip ceramic capacitors exhibit low temperature coefficients and stable capacitance values. This makes it useful in applications where stable performance is required, such as precision measuring instruments and demanding communications equipment.

Multilayer chip ceramic capacitor structure

Multilayer chip ceramic capacitors are composed of multiple ceramic layers and conductive layers stacked alternately. The following is its typical structure:

1. Ceramic layer

The core part of multilayer chip ceramic capacitors is the ceramic layer, which is usually made of ceramic materials such as iron oxide (Fe2O3) and titanium dioxide (TiO2). These ceramic materials have good dielectric properties and stability and can operate in high temperature and high frequency environments.

2. Conductive layer

The conductive layer is located between the ceramic layers and serves to connect the individual ceramic layers and provide a path for current flow. The conductive layer is usually made of conductive materials such as silver (Ag) or tungsten (W), which has good conductivity and contact properties.

3. Terminal electrode

The multilayer chip ceramic capacitor has a terminal electrode at each end for connecting to an external circuit. Terminal electrodes are usually made of materials such as copper (Cu) or nickel (Ni) to ensure a reliable connection between the capacitor and the circuit.

Through the introduction of this article, readers can have a deeper understanding of the structure and characteristics of multilayer chip ceramic capacitors, and provide a reference for their selection in electronic equipment.