Anti-static precautions during production
First of all, we find the cause and the hazard of static electricity. From a macroscopic point of view, the reasons are: friction between the objects, heat transfer, electron transfer; contact and separation between objects to produce electron transfer; electromagnetic induction causes the surface charge of the object Balanced distribution; the combined effect of friction and electromagnetic induction. Microscopically, according to the theory of atomic physics, the substance is in an electrical equilibrium state when it is electrically neutral. The electrons are lost due to the contact of electrons of different substances, causing the material to lose its electrical balance and generate static electricity. The electrostatic voltage is generated by the contact and separation of different kinds of substances. Because the LED display screen is mainly in the actual production process, the direct contact and indirect contact between the human body and related components generate static electricity. Therefore, we are striving to take corresponding protective measures against static electricity. This is the reason, mainly from two aspects:
1. If you ignore anti-static at any point in production, it will cause the electronic device to malfunction or even damage it. When the semiconductor device is placed alone or mounted in a circuit, even if it is not powered, permanent damage to these devices may occur due to static electricity.
2. Caused by the temperature of the node exceeding the melting point of semiconductor silicon (1415 ° C). The pulse energy of static electricity can generate localized heat, so there is a direct breakdown of the lamp and the IC. This failure occurs even if the voltage is lower than the breakdown voltage of the medium.
So what do we pay attention to or how to take protective measures against the static electricity mentioned in the appeal? Specifically, it is mainly explained from the laying of grounding and anti-static grounding wires.
First of all, from the grounding point; it is to directly discharge static electricity to the earth through the wire connection, which is the most direct and most effective anti-static measures. Specifically from five aspects.
a: In the production process, workers are required to wear a grounded electrostatic wristband.
b: Use a low-voltage DC electric screwdriver with a grounding wire as much as possible during the assembly process.
c: When soldering, the soldering iron should use anti-static low-temperature soldering iron as much as possible, and maintain good grounding.
d: Ensure effective grounding of production pull table, glue filling station and aging frame.
e: The production environment is required to be grounded with copper wire.
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