Electronic components are a general term for electronic components and electronic devices. Electronic components are products that do not change the molecular composition of the factory during processing. They usually include resistors, capacitors, inductors, potentiometers, relays, connectors , various sensitive components, resonators, filters, switches, and so on. In most cases, electronic components often refer to resistors, capacitors, and inductors. The electronic device refers to a product that changes the molecular structure of the factory during production and processing, and usually includes a diode, a triode, an integrated circuit, and the like.
The role of electronic components
We all know that electronic products need programs to run, and then the program depends on what to run, regardless of the big rocket, aircraft, automotive electronics , small mobile phones, sports bracelets and other products, no need to use electronic circuit boards, the initial design of the product The most important part is also the electronic circuit board, and the important part of ensuring that the electronic circuit board can run the program software is the large and small components. The electronic component is connected to the PCB through SMT chip processing or DIP post-welding, and After importing the program software, you can perform functional tests.
Characteristics of electronic components
Surface mount electronic components, also known as chip electronic components, are characterized by the following aspects.
(1) Small size, light weight and saving raw materials.
The chip type electronic components are small in size, generally in the order of 0.5 mm to several tens of millimeters, and have a thickness of 0.2 to 2 mm, and are mostly no lead wires or short lead wires. Therefore, the weight is reduced, the raw materials are saved, the cost is reduced, and the high-density assembly is facilitated, thereby facilitating miniaturization, thinning, and weight reduction of the electronic whole machine.
(2) It is beneficial to improve the reliability of electronic equipment.
The chip-type electronic components have no lead wires or short lead wires, small size, light weight, thin thickness, especially no lead wire structure, which makes it more able to withstand vibration and shock, and is easier to generate when the circuit works. The heat is dissipated, and the chip electronic components have been designed and manufactured to meet the requirements of high temperature soldering conditions and cleaning conditions in surface mount technology. The materials of the chip electronic components and their proper packaging methods are High temperature resistance, not afraid of welding, moisture resistance. In addition, surface mount technology does not require plug-in assembly techniques like traditional lead-out electronic components, and plug-in lead through-holes are one of the major failures of recognized circuits. The surface-mounting circuit using chip electronic components fundamentally eliminates the root cause of this failure, thereby improving the reliability of the electronic device.
(3) Excellent electrical properties.
The lead-free or short lead-out structure of the chip type electronic component reduces the parasitic inductance and parasitic capacitance caused by the lead wire, reduces the equivalent series resistance brought by the lead wire, and improves the maximum of the electronic component itself. Cut-off frequency. Not only is it beneficial to improve the frequency characteristics and response speed of the entire circuit, but also requires almost no adjustment after assembly, which is advantageous for assembly of high frequency circuits.
(4) The size and shape are standardized and the overall cost is low.
The external dimensions of most chip electronic components have been standardized, and they can be assembled by an automatic binding machine. The work efficiency is high and the welding quality is good, enabling high-volume assembly. Although the price of a certain type of chip electronic component is still higher than that of a conventional electronic component, the price of the chip type electronic component itself has a potential advantage that it is cheaper than the conventional electronic component.
The reason for the price of some chip electronic components is higher than that of ordinary electronic components. On the one hand, the production technology is not mature, and on the other hand, the performance and manufacturing process requirements of chip electronic components are more stringent. . Nevertheless, considering the comprehensive cost of using chip electronic components, it is still lower than the cost of using traditional assembly technology using traditional electronic components, and the cost performance is extremely high.
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