電磁干擾 (EMI) 與射頻干擾 (RFI) 是電子系統三種主要干擾的其中兩種。根據其來源可分為外界和內部兩種，每個電子電氣設備均可視為干擾源。EMI是在電子設備中產生的不需要的響應；RFI則從屬于EMI。
Electro-Magnetic Interference (EMI) and Radio Frequency Interference (RFI) are two of the three major interferences in the electronic system. According to sources, they can be divided into internal interference and external interference. Each electrical and electronic equipment can be regarded as the source of interference. EMI is the unwanted response generated in the electronic device, while RFI belongs to the EMI.
For modern electronic products, functions are more and more powerful, and electronic circuits are becoming increasingly complex. Electro-Magnetic Interference (EMI) and electro-magnetic compatibility becomes a major problem. EMI can change, diminish the performance of the electronic system, or even lead to complete system failure. This gave birth to the research, development and application of shielding technology.
Shielding is using metal barriers to isolate two space regions, in order to control the electric field, magnetic field and electromagnetic waves from one region to another region in terms of induction and radiation. Specifically, a shield is used to surround the component parts, circuit, assembly, cable or interference source of the entire system so as to prevent the outdiffusion of electromagnetic interference. The shield surrounds the receiving circuit, device or system to protect them from the external electromagnetic field. But in today's lightweight electronic systems, plastic components are widely used, so the use of conductive coatings with properties of the housing secondary processing becomes an important means of solving EMI/RFI interference. In recent decades, the conductive coating has been applied in a variety of military and civilian industrial electronics, electrical appliances, aviation, chemicals, printing and the like. Accordingly, the theoretical study of conductive coating has also been developing rapidly, and to promote the application of technology has become more sophisticated and Improvement.
常見的 EMI 來源 | Common Sources of EMI
Wilkon provides various conductive coatings with different formulations. These coatings use silver, nickel or mixed metal as based fillers, and combine with high-powered polymer to pass the IEEE 299-1997 standard. By spraying, dipping or brushing, a uniform conductive, wear-resistant, strongly adhesive coating can be formed on the inner wall of the plastic housing, providing cost-effective solutions to EMI in electronic systems.
Since Wilkon's foundation, we have established cooperation with a number of powerful state-owned enterprises, military enterprises, listed companies, private companies or international companies. We provide quality-stable materials and efficient service. Our sales staff has gone through rigorous training and has extensive application experience. These all guarantee that Wilkon constantly gets more customers’ trust and recognition. If there’s any inquiry on chemical materials, please feel free to contact us.
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