Common methods of electrostatic protection
Antistatic measures in the electronics industry are very important. The main antistatic methods are electrostatic leakage, dissipation, neutralization, humidification, shielding and grounding. The specific and common methods are to establish an antistatic production environment and operation and packaging methods. Antistatic floors, antistatic tables and chairs, antistatic materials, ion fans, shielding bags and various grounding systems are used. ESD protection is strengthened by various methods such as electrostatic wrist straps and antistatic shoes to reduce the danger of electrostatic discharge and ensure the improvement of product quality and yield. The human body is the most common source of electrostatic hazards in the production environment of the electronics industry. For static electricity, the human body is a conductor, so the main antistatic measure is to strengthen the grounding of the human body. The most common method is: use antistatic ground, antistatic shoes (from feet to the ground are static), and wear antistatic wrist straps and ground (from hands to the ground are static). It can be seen that in addition to building standard antistatic floors, antistatic detection of personnel is particularly important, mainly using the human body comprehensive static tester to test whether the personnel are wearing antistatic wrist straps and whether the antistatic is normal within the standard range, not too low or too high. Why can't it be too low? From the perspective of anti-static, the total resistance of the human body to the ground should be as small as possible, but the minimum value will be limited by safety. If it is a metal device, the human body must have a certain grounding resistance value. In the case of a short circuit with the industrial frequency power supply, the resistor will limit the current flowing through the human body, so if the resistance is too low, an industrial safety incident may occur when the current leaks. Is it too high? The wrist strap or anti-static value exceeds the standard high resistance value. The static electricity generated by the human body cannot usually be discharged through a wrist strap or anti-static shoes. Electrostatic discharge may damage electronic components. Therefore, please wear anti-static clothing correctly. Wrist straps, anti-static shoes, and inspections to ensure that they are normal and correct are important steps to enter the production workshop.
Strengthen the control of human anti-static detection:
In many places where EPA is set up, the testing of anti-static shoes and anti-static wrist straps is carried out through traditional manual login or supervision methods, which are difficult to implement and even make mistakes, making it difficult to obtain customers and management. This trust has also formed a huge potential loophole in the static grounding of the police. As mentioned earlier, ESD control protection has also become one of the core conditions that customers should pay attention to when selecting suppliers. Therefore, more and more people regard the anti-static detection of the human body as an important inspection item, and the foundry must be well controlled. Personnel static detection. The ESD electrostatic protection access control system is a combination of a comprehensive human body electrostatic tester and an access control system. In response to the shortcomings of traditional human body electrostatic testers, it proposes a variety of solutions to ensure that when the operator enters the EPA area, the personnel are properly charged. Prepare to be grounded. Scope of application: SMT production line control area, semiconductor industrial clean room, high-tech R&D room, national defense and military electrostatic control area, explosive disposal area, aerospace maintenance verification area, electrostatic control area, oil and gas electrostatic control area, biochemical industry electrostatic control area... Various occasions where anti-static testing and protection are required. Personnel are properly charged. Prepare to be grounded. Scope of application: SMT production line control area, semiconductor industrial clean room, high-tech R&D room, national defense and military electrostatic control area, explosive disposal area, aerospace maintenance verification area, electrostatic control area, oil and gas electrostatic control area, biochemical industry electrostatic control area... Various occasions where anti-static testing and protection are required. Personnel are properly charged. Prepare to be grounded. Scope of application: SMT production line control area, semiconductor industry clean room, high-tech R&D room, national defense and military static control area, explosive disposal area, aerospace maintenance verification area, static control area, oil and gas static control area, biochemical industry static control area... Various occasions where antistatic testing and protection are required.