ESD protection guide, how to classify ESD protection levels?

GBT17626-2 specifies some experimental grades, and the ESD grade can be divided into 4 grades: 2KV 4KV, 6KV, and 8KV.

esd：ESD (electro-static discharge) means:"Electrostatic discharge"。Since the middle of the 20th century, ESD has been formed to study the generation, hazards and electrostatic protection of Jingnaliang plexus.

Therefore, it is customary to refer to the equipment used for electrostatic protection collectively as ESD, and the Chinese name is electrostatic impedance.

ESD is the abbreviation of electro static discharge, which means electrostatic discharge in Chinese: between two objects at different potentials, the transfer of charge ** due to direct contact or electrostatic field induction). It can be seen that electrostatic electricity and electrostatic discharge (ESD) are completely different physical concepts or physical processes.

One is "stillness" and the other is "movement". Along with electrostatic discharge, there is often the transfer of electricity, the generation of electric current, and the radiation of electromagnetic fields.

The measures for electrostatic protection are generally as follows:

Static dissipation: Mainly use static dissipative materials, (i.e., materials with a surface resistance between 10 to the 5th ohm to 10 to the 11th ohm) to replace ordinary materials. For example, anti-static mats, anti-static flooring, anti-static packaging boxes, etc.

Electrostatic discharge: It usually refers to the grounding of equipment and personnel, that is, the equipment is grounded through metal wires with a cross-sectional area that meets the standard, and the personnel are grounded through bracelets, clothing, anti-static shoes and other measures.

Electrostatic neutralization: Generally speaking, it refers to the use of ionizers to create positive and negative ions and blow the ions to the area where static electricity needs to be eliminated to neutralize the static electricity when it is difficult to use grounding or static dissipative measures. Common ones are ionizing fans, wind snakes, and so on.

Electrostatic shielding: Electrostatic shielding is further divided into active shielding and passive shielding. It mainly refers to the use of Faraday cage principle, the use of closed conductors to shield static power or products that need to be protected.

Ambient humidification: Experimental data show that the increase in ambient humidity can effectively reduce the probability of electrostatic discharge. However, environmental humidification can only be used as an auxiliary measure, not as a substitute for the above measures.

ESD protection design of electronic products: that is, anti-static circuits are set on electrostatic sensitive components, and there are a variety of mature protection circuits at home and abroad, which can effectively protect the electrostatic voltage of up to 1,000 volts. Protection circuitry can reduce the susceptibility of components to ESD, but cannot eliminate them completely.

The performance of the TVS diode is good, and it can withstand the impact of countless regrets. This is very good for EFT and ESD protection.

Grounding or ESD shielding, domestic R & D and production of ESD manufacturers, Adio is one.

The company's systematic baiesd training course is combined with the actual on-site situation.

zhi explains, it's still a dao

ESD means:"Electrostatic discharge"meaning. Static electricity is an objective natural phenomenon that occurs in a variety of ways, such as contact, friction, etc. Static electricity is characterized by high voltage, low charge, low current, and short action time.

Static electricity causes serious harm in several areas. Triboelectric and human classics are the two major hazards in the electronics industry. The main measures of electrostatic protection in the production process are electrostatic leakage, dissipation, neutralization, humidification, shielding and grounding.

Electrostatic protection is a long-term system engineering, and any mistake or omission in any link will lead to the failure of electrostatic protection. The human electrostatic protection system mainly consists of anti-static clothing and anti-static wrist straps, ankle straps, shoes and socks, caps, gloves or finger covers, etc., which have the functions of electrostatic leakage, neutralization and shielding.

The electromagnetic field effects of electrostatic discharge, such as electromagnetic interference (EMI) and electromagnetic compatibility (EMC), have become an urgent problem to be solved. On the one hand, the wide application of some polymer materials with high resistivity such as plastics, rubber and other products and the high-speed of modern production processes have made the accumulation of electrostatic energy to a very high degree, on the other hand, the production and use of electrostatic sensitive materials, such as light oil, gunpowder, solid-state electronic devices, etc., the industrial and mining enterprise sector is also more and more prominent by the harm of static electricity, and the electrostatic hazard has caused quite serious consequences and losses. It can inadvertently break down expensive electronic devices, causing huge losses to the electronics industry.

(1) Diffusion or Poly Resistor;

2) Diode (P-N junction);

3) Metal-oxygen semi-(MOS) components (NMOS or PMOS);

4) Thick oxide device (Field-oxide device);

5) bipolar junction transistor;

6) Parasitic silicon-controlled rectifier assembly (SCR device, p-n-p-n structure).