Classification of static electricity in the electronics industry
The formation of static electricity hazards in the electronics industry can be divided into two categories: one is the adsorption of floating dust caused by electrostatic attraction; the other is dielectric breakdown caused by electrostatic discharge.
(1) Static electricity adsorption: Due to the mechanical effect of static electricity, in this case, it is easy for floating dust in the workplace to be adsorbed on the surface of the chip, and even a small amount of dust adsorption may affect the good performance of semiconductor devices. Therefore, the production of electronic products must be operated in a clean environment, and operators, equipment and environment must take a series of anti-static measures to prevent and reduce the formation of static electricity hazards.
(2) Dielectric breakdown: The breakdown of components caused by static electricity is the main way of static electricity hazards in the electronics industry. In a strong electric field, as the electric field strength increases, the charge continues to accumulate. When it reaches a certain level, the dielectric will lose its polarization characteristics and become a conductor, and finally produce thermal damage to the dielectric. This phenomenon is called dielectric breakdown.
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