Passive components, also known as passive components, refer to circuit components that do not affect the basic characteristics of the signal and only allow the signal to pass without modification. The most common ones are resistors, capacitors, inductors, ceramic oscillators, crystal oscillators, transformers, etc. From the perspective of working characteristics, passive components have the characteristics of not consuming electric energy by themselves, or converting electric energy into other forms of energy; at the same time, they only need to input signals and can work normally without external power supply.

According to different industry definitions, the scope of passive components will be different, and sometimes RCL components are equivalent to passive components. This question will focus on the RCL component market, namely the capacitor, resistor, and inductor market. Passive components appearing in the text all refer to RCL components. On the whole, as the most basic electronic components, the total demand for RCL components has steadily increased. With the demand for miniaturization and light weight of downstream end products, chip components have become the mainstream of RCL components and the most advanced in the industry. Important driving factor.

Various types of terminal products have requirements for miniaturization and light weight, which has promoted the global chip resistance rate to increase year by year. In 2012, the global output of chip resistors accounted for more than 90% of the total output of resistors. The development of chip resistors has an impact on the resistance industry. The overall development has played a vital role. Thanks to the global mobile phones entering the era of 3G, 4G, multimedia and smart phones, including chip capacitors, chip resistors, chip inductors, etc., all have increased by 50% or even several times compared to the previous generation, and the demand for chip resistors will follow. Increasing.

It is precisely because of the cornerstone function of passive components that the proportion of circuit components has gradually increased, and the market has grown steadily. Passive components are needed in any circuit, and the number of passive components in the circuit is also steadily increasing. In 1983, passive components accounted for only 21% of the PCB bill of materials, but by 2003, passive components accounted for an average of 80% of the PCB bill of materials , Accounting for about 20% of the cost. In terms of market size, the passive component market reached US$24.24 billion in 2016 and is expected to reach US$3.28.9 billion in 2021, with a compound growth rate of 6.29%. In automotive electronics (3400 pieces), PC (2200 pieces), LCD TVs (2100 pieces), iPhone 6 plus (1100 pieces), game consoles (1020 pieces), digital cameras (840 pieces), iPods (230 pieces), etc. Passive components are widely used in the field.

From the perspective of history and development context, the passive component industry has mainly benefited from the rise of downstream terminal applications and markets. With the help of technological development and capital support, the related technologies of passive components and the corresponding market scale have maintained steady progress and development of. Since 1990, the electronic product market has experienced several major waves such as the popularization of home appliances, PCs, and recent smart phones, which have greatly stimulated downstream consumption and promoted the development of the entire semiconductor industry. Since 2012, semiconductor sales have shown 3.9% Compound growth rate. Therefore, the passive component market in the upper reaches of the industrial chain has also received such a bottom-up transmission and pull, showing a steady upward trend. Compared with the compound growth rate of 5.3% maintained by the semiconductor market scale, the annual average compound growth rate of the passive component market scale The growth rate has reached 6.29%, and the overall development trend is stable.

Capacitors are mainly used for charge storage, AC filtering or bypassing, cutting off or blocking DC voltage, providing tuning and oscillation, etc. They are widely used in circuits for blocking AC, coupling, bypassing, filtering, tuning loops, energy conversion, and control etc.

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