Effective and correct implementation plan for ESD protection
In the production process of the electronics manufacturing industry, ESD protection will fail if you are not careful. There are many reasons for the mistakes in the basic rules of protection. During the production process, everyone must pay attention to every detail. Eliminate static electricity from the source and control the generation of static electricity. And accumulation, use low-static materials, eliminate or limit insulation materials, take static elimination or suppression measures, control the discharge process, avoid unnecessary contact with electrostatic sensitive devices during production, especially in the pin part, avoid electrostatic sensitive devices "Golden Division Contact", choose to replace static dissipative materials, protect static sensitive devices melodiously, ESD protection design for static sensitive devices, and use static protective packaging during turnover
1. ESD protection goals of electronic devices
The ESD protection of electronic devices should be able to prevent electronic devices from failing when they respond to ESD.
1. For energy-sensitive electronic devices, the goal of ESD protection is that ESD will not cause the heat generated inside the electronic device to exceed its maximum tolerance.
2. For voltage-sensitive electronic devices, the goal of ESD protection is that ESD will not lead to the voltage difference generated on the internal structure of the electronic device beyond its large tolerance.
At present, in the electronics industry, the ESD protection target can be determined according to the ESD sensitivity of the electronic device. That is to say, as long as the ESD can be controlled to not exceed the ESD sensitivity of the electronic device, then such ESD protection can be effective and sufficient. of.
2. Basic strategies for ESD protection of electronic devices in the electronic manufacturing industry
The ESD protection of electronic devices can be solved separately from several aspects
1. Enhance the ESD tolerance of electronic devices and reduce their ESD sensitivity
A. Add ESD protection design inside the electronic device
B. In the production process, adopt ESD protective packaging for electronic devices
2. Control the generation or accumulation of static electricity
A. To suppress the generation or accumulation of static electricity
B. Properly eliminate or suppress the generated or accumulated static electricity
3. Control the electrostatic discharge process
A. Avoid unnecessary contact with the electrical pins and pin parts of electronic devices, especially "metal contact"
B. When directly contacting the material surface of electronic devices, it should meet the requirements of safe electrostatic discharge (static dissipative)
For most electronic devices, as long as any one of these three aspects is effectively controlled (ESD sensitivity of electronic devices), it is sufficient to achieve effective ESD protection of electronic devices
3. The original technology of ESD protection in the electronics manufacturing industry
1. The original technology of adding ESD protection inside electronic devices
2. The production operations of ESD-sensitive electronic devices are restricted to special electrostatic protection areas
3. Construct electrostatic protection workstations in the electrostatic protection area to provide effective protection for the operation of ESD-sensitive electronic devices
4. Establish an electrostatic grounding or equipotential connection system in the electrostatic protection area
5. The personnel in the electrostatic protection area conduct electrostatic grounding or equipotential connection
6. Use low-static materials as much as possible in the electrostatic protection area to replace high-static materials such as insulation
7. Direct contact with the material surface of ESD-sensitive electronic devices, as far as possible to meet the surface resistance characteristics of static dissipative
8. In the electrostatic protection area, ionized electrostatic neutralization can be used as the second choice or auxiliary means of electrostatic control
9. Electrostatic protective packaging is adopted for electronic devices sensitive to ESD
10. In the electrostatic protection area, the environmental humidity can be controlled within a specific range as an auxiliary means of electrostatic control
11. ESD sensitive electronic devices and ESD protection related areas, materials should be appropriately marked to facilitate the effective and correct implementation of ESD protection