What are the safety measures to eliminate static electricity
1. Design the electrostatic protection inside the components and products, design your components, products and assembly to make it more reasonable to avoid electrostatic discharge. If possible, use components that are not sensitive to static electricity, or provide appropriate input protection for the components you use that are sensitive to electrostatic discharge. The contradiction here is that advanced production technology means smaller and more complex geometries, which are usually more sensitive to static electricity. However, the more static control is established in the product design, the fewer problems will occur afterwards.
2. Eliminating the materials and processes that generate static electricity is obvious, and product design is not the complete answer. You cannot avoid electrostatic components and products, but you can reduce or eliminate the generation and accumulation of electrostatic discharge. First of all, it is necessary to reduce or eliminate many static electricity-generating processes or materials, such as ordinary plastics, from the working environment. Because static electricity does not occur between materials that maintain the same potential or zero potential, the processes or materials in the working environment should be maintained at the same electrostatic potential. Generally, these conductive or dissipating materials should be electrically connected to the same common ground, such as an electrical ground. In addition, provide a ground wire to the electrostatic wrist strap, anti-static floor mat or workbench surface to safely reduce discharge and accumulation.
3. Dissipate or neutralize electrostatic discharge. Because all the generation of static electricity cannot be completely eliminated, our third principle is to safely dissipate or neutralize those electrostatic discharges that will occur. Proper grounding and conductive or dispersible materials play a major role. For example, workers who bring static electricity into the working environment can eliminate the static electricity on their body by wearing an electrostatic wristband or wearing static-controlled work shoes and stepping on the electrostatic floor mat, and spread the static electricity to the ground instead of discharging sensitive components. For some objects, such as ordinary plastics and other insulators, grounding cannot eliminate electrostatic discharge. Normally, ions are used to neutralize the discharge on these insulating materials. The process of ion action produces positive and negative ions, which are attracted to the surface of the discharge object, thus effectively neutralizing electrostatic discharge.
4. Provide physical protection against electrostatic discharge. Our fourth principle is to prevent electrostatic discharge from contacting sensitive components and assemblies. One method is to provide proper grounding or shunting of components and assemblies to disperse any electrical discharge from the product; the second method is to package and transport sensitive components in appropriate packaging materials. These materials can effectively shield the product from static electricity and reduce the static electricity generated by any product movement in the package.
5. Check your process and environment. For example, use a field meter to detect the existence of an electrostatic field that may cause electrostatic hazards. Measurement is the safest method. You identify and quantify those areas that really need electrostatic protection, allowing you to focus on those areas of greatest concern. In addition, you can confirm those areas that will not produce static electricity hazards, saving you the cost of unnecessary protection.
These five principles become the basis for effective static control procedures. They can help select the appropriate materials and procedures to effectively control static electricity. In most cases, effective procedures will involve all these concepts. In the development of the control program, confirm those sensitive components, sensitive levels, and those operations that have electrostatic hazards. Then see which concept will protect these components. Finally, select and implement a combination of procedures and materials that can accomplish this task.