Although the static electricity will not be like electricity can cause great harm to the human body, but it is not small damage to electronic products, many electronic processing enterprises are plagued by static electricity, so many well-known enterprises to invest a lot of money for the production workshop anti-static improvement, the staff of static protection training.
So how does electrostatic in the electronics industry come from?
(1) Contact-separation of electricity-two objects contact, during which distance is less than 25x10-8cm, due to the different atoms of the ability to gain or loss electrons, different atoms of the outer electrons of different energy levels, in which the electron transfer occurs. Therefore, both sides of the interface will appear equal size, polar opposite two-layer charge. These two layers of charge are called the electric double layer, in which the potential difference is called the contact potential deviation.According to the theory of double electric layer and contact potential ifference, it can be inferred that static electricity may be generated when two kinds of materials are close contact and then separated.Electrostatic sequence--in accordance with the polarity between the two materials, the contact with a positive charge of the row in front, negatively charged in the back, in turn, can be arranged into a long sequence, such a sequence is called electrostatic sequence or electrostatic electrification sequence.
(2) breaking up electricity-material rupture can lead to positive and negative charges in the macroscopic range of separation, that is, static electricity, which is called breaking off electricity.The starting electricity in the process of solid crushing and liquid separation belongs to breaking and breaking up.
(3) Induction of electricity-charged body a with a negative charge, near the conductor B,
In the electrostatic induction of a charged body a, a positive charge appears at the end of B;
Because the conductor B is connected with the grounding conductor C, the B ground potential is still zero; B becomes a charged body when B leaves the grounding conductor C.
(4) Charge migration-When a charged body is contacted with a non charged body, the charge is redistributed, that is, the charge is transferred and the non charged body is electrified. When a charged droplet or dust hits a conductor, a charge transfer is generated, and a charge migration occurs when the gas ions flow over an electrically charged object.