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Inductors can be divided into four types based on manufacturing processes, namely wound type chip inductors, stacked chip inductors, woven chip inductors, and thin film chip inductors. The commonly used types are wound and stacked. The former is a product of miniaturization of traditional wound inductors; The latter is made using multi-layer printing technology and stacked production process, which is smaller in volume than wound type chip inductors and is a key product developed in the field of inductance components. The current situation and development trend of chip inductors. Due to the difficulty in achieving sufficient inductance and quality factor (Q) for micro inductors, and the complexity of the manufacturing process due to the interweaving of circuits and magnetic circuits in magnetic components, the chip based inductors, as one of the three basic passive components, are significantly lagging behind capacitors and resistors.

1. Winding type SMD inductor

It is characterized by a wide range of inductance (mH ～ H), high precision of inductance, small loss (i.e. large Q), large allowable current, strong inheritance of manufacturing process, simplicity, low cost, etc., but its disadvantages are limited in further miniaturization. Ceramic core wound wire inductors can maintain a stable inductance and a relatively high Q value at such high frequencies, thus occupying a place in high-frequency circuits.

2. Stacked chip inductance

It has good magnetic shielding, high sintering density, and good mechanical strength. The shortcomings are low qualification rate, high cost, small inductance, and low Q value.

Compared with wound inductor, it has many advantages: small size, favorable for circuit miniaturization, closed magnetic circuit, no interference with surrounding components, and no interference from adjacent components, which is conducive to high-density installation of components; Integrated structure, high reliability; Good heat resistance and weldability; Regular in shape, suitable for automated surface installation production.

3. Film type

It has the characteristics of maintaining high Q, high accuracy, high stability, and small volume in the microwave frequency band. The internal electrodes are concentrated on the same layer, with a concentrated magnetic field distribution, which ensures that the device parameters do not change much after installation and exhibit good frequency characteristics above 100MHz.

4. Woven type

The characteristic is that the unit volume inductance at 1MHz is larger, smaller, and easier to install on the substrate than other chip inductors. Micro magnetic components used for power processing.