Misunderstandings and problems of electrostatic protection
1. Misunderstandings of electrostatic protection
It is a wrong way to connect the power supply to zero and the lightning protection ground and static ground to share the same ground source. Lightning strikes will affect product performance and personal safety through the loop.
Use a humidifier to increase humidity when anti-static. If this method is used for a long time, the water film on the surface will gradually have a chemical effect on the components in the environment, accelerate the corrosion of metal parts, and cause short circuit of the components.
Wearing anti-static shoes is an indispensable part of anti-static treatment. But everyone has fewer requirements for socks. Thick quilts made of wool in winter will affect the anti-static effect.
2. The problem
The composite conductive board is a decorative board mixed with an internally added antistatic agent, and its conductivity is restricted by ions and is not durable. The rubber sheet mixed with conductive filler mainly contains conductive carbon black, which has poor color and wear resistance. High polymer board with conductive fiber or other conductive fillers, the main component is polyvinyl chloride (PVC), which has good conductivity, wear resistance, acid and alkali resistance, is also stable, and the color is OK, but the process is more complicated and the cost is higher . At the same time, products with high electrical conductivity, good color and luster, good durability, good processability and low price still need technological progress.
Raised floor. At present, the surface of the raised floor produced in China is usually made of steel, aluminum, plastic or wood as the substrate, and the surface is covered with a decorative board mixed with an internal antistatic agent as the surface layer. The disadvantage is that the conductivity of the surface layer is not durable enough. . The surface layer must ensure that the human body's static electricity can be discharged as soon as possible, and the durability of conductivity needs to be improved. Conductive glue should be used for the bonding between the board surface substrate and the surface layer, which requires high adhesive force and certain elasticity. At present, the common defect is the surface layer warping or cracking.
Electrostatic protection in the production process of electronic products involves the whole process of selecting and ordering electrostatic sensitive devices, entering the factory for acceptance, storage, assembling and welding into products to debugging and packaging; involving technical, management, production and other departments and various personnel Participate and cooperate. Electrostatic protection is a comprehensive system project. Only when leaders pay attention to it, participate in all parties, and have a strong awareness of electrostatic protection, can it receive obvious protection effects and reduce losses.