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　　1、 What is Static Electricity

　　Static electricity is a static charge. Any two objects of different materials that come into contact and then separate will generate static electricity.

　　The main ways of generating static electricity include friction, contact and separation, and induction.

　　In daily life, common and obvious static electricity include: lightning; Electric shock sensation when walking on the floor mat and touching handles in winter; The crackling sound produced when dressing in winter. These have no impact on our human body, but they have a significant impact on electronic components and circuit boards.

　　2、 Electrostatic protection

　　(1) The hazards of static electricity:

　　1. Electrostatic adsorption (micro dust pollution): The electrostatic adsorption force is directly proportional to the amount of static electricity.

　　2. Electrostatic discharge (ESD): The current of electrostatic discharge is directly proportional to the amount of static electricity. The destructive energy caused by the current of electrostatic discharge may not only damage the product, but also cause radio frequency interference and affect the production and operation of computer control programs.

　　Examples of the hazards of static electricity in the electronic industry:

　　A-chip manufacturing:

　　----Electrostatic adsorption of fine dust particles, polluting chips

　　----The radio frequency generated by electrostatic discharge interferes with production and causes the machine to stop without reason

　　B integrated circuit:

　　----Electrostatic discharge Electrical breakdown oxide layer, causing short circuit

　　----The discharge current of electrostatic discharge partially melts the circuit of the metal layer, causing an open circuit

　　----The high temperature generated by electrostatic discharge changes the properties of semiconductors, causing abnormal operation.

　　----Electrostatic discharge causes some minor damage, and when the finished product is in normal operation, the minor damage will expand, causing the final product to malfunction.

　　Assembly of C integrated circuits on circuit boards:

　　Electrostatic discharge effects may occur during plug-in, welding, or maintenance, which can damage the components on the board

　　Manufacturing of D liquid crystal wafers:

　　----Electrostatic adsorption of fine dust on glass, causing pollution

　　----Static electricity remains between two pieces of glass, and if discharged, it affects the display of the LCD panel

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