How is the static electricity generated in the Pcb assembly factory?

- Mar 19, 2019-

1. Static electricity

Static electricity is an electrical energy that remains on the surface of an object. It is the result of the imbalance of positive and negative charges in a localized range. It is formed by the conversion of electrons or ions. Usually, the object is not electrically external, and when two objects rub against each other, a part of the electrons in one object will be transferred to another object, so the object loses electrons and carries a "positive charge". Another object gets a "negative charge" on the electron strip. The charge cannot be created or disappeared, it can only be transferred from one object to another. Electrostatic phenomenon is a general term for electrical phenomena generated during the generation and disappearance of electric charges.


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As mentioned above, usually the positive and negative charges of an object are equal, so that the externality is not sensible. However, if the contact or electrostatic induction of two different materials causes the transfer of charge, static electricity is generated.

2. Way of generating static electricity

There are many ways to generate static electricity, such as contact and friction between two objects, electrolysis, temperature difference, and the like. The main form includes two

Species: Friction generates static electricity and induces static electricity.

In daily production and life, people often feel the phenomenon of frictional electrification. The principle of its production is shown in the figure. Triboelectric charging is usually divided into two processes: 1 contact with an electron transfer process. When two objects are in contact, an "electric double layer" is formed at the interface; 2 a process of rubbing and separating electricity together. When two objects come into contact and quickly separate, there is always one

The transferred electrons are too late to return to the original object, so that one object is negatively charged due to excess electrons, while the other object is positively charged due to insufficient electrons.

In fact, as long as two different objects are contacted and separated, static electricity is generated, and the heat generated by the rubbing provides energy for electron transfer, and the electrostatic effect is greatly enhanced. Friction generates static electricity mainly between insulators.

When a conductor is close to a charged body, a different kind of charge is induced on the surface near the charged body, and the table away from the charged body

The same type of charge appears on the surface, which is the process of inducing static electricity.

The above is FASTPCBA to provide you with information on the factors generated by static electricity, I hope to help you!


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