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General Knowledge of the Nature of Antistatic

Update:04-08-2016
Summary:

1. What is ESD? ESD stands for English ElectroStatic Di […]

1. What is ESD?

ESD stands for English ElectroStatic Discharge, which means "electrostatic discharge". ESD was formed in the middle of this century to study the generation and attenuation of static electricity, electrostatic discharge models, electrostatic discharge effects such as current heat (spark) effects (such as ignition and explosion caused by static electricity), and electromagnetic effects (such as electromagnetic interference). Subject. In recent years, with the rapid development of science and technology, the wide application of microelectronic technology and the increasingly complex electromagnetic environment, more and more attention has been paid to the electromagnetic field effects of electrostatic discharge such as electromagnetic interference (EMI) and electromagnetic compatibility (EMC).

2. The limit of static ignition?

The ignition potential of the electrostatic non-conductor is about 30KV. According to the national standard “General Guidelines for Preventing Electrostatic Accidents”, it is pointed out in Article 5.2.3 that the static non-conductor potential below 15KV will not ignite the flammable gas with a minimum ignition energy greater than 0.2mJ. However, in some cases, the limit of ignition is still small, and some standards stipulate about 5KV. The charged potential that prevents the human body from being subjected to electrostatic non-conductor electric shock is about 10KV or less.

3. Parameters of electrostatic performance?

The amount of charge of an object is usually expressed by the amount of electrostatic charge and electrostatic voltage. The antistatic properties of materials such as plastics, rubber, antistatic floor (face), carpet, etc. are usually made of resistance, resistivity, volume resistivity, surface resistivity, and charge. (or voltage) half-life, electrostatic capacitance, dielectric constant, etc. But the most commonly used and most reliable are resistance and resistivity.

4. How does static electricity affect the human body?

If the static electricity of the human body exceeds 2 to 3 kV, an electrostatic shock will occur when a person touches a grounded metal. If the electrostatic voltage is high, it will have a certain impact on human psychology and physiology.

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