The main reason for not eliminating static electricity
Electronic processing companies and semiconductor factories have done a lot of anti-static protection measures. Static accidents still exist. Among them, the wrong anti-static method is one of the causes of the accident. Based on years of understanding of the problems found at the customer's production site, I summarized a few errors Use method or static electricity protection misunderstanding, write it out and share with you.
1. Anti-static elimination equipment has not been tested as required for a long time, and some of them have no static elimination function but are still in use. For example: ion fan, the surface of the ion needle has been covered with dust, and ion wind cannot be generated at all. The ion fan has lost the function of eliminating static electricity.
The anti-static wrist strap must be in close contact with the human body.
= The wrist strap is easy to damage, so it needs to be tested every day. A good wrist strap will also be too loose to be conductive due to workers wearing it, so the best way is to monitor in real time with the wrist strap online monitor. However, there are many companies that do not even have a wrist strap tester. An anti-static wrist strap has been used for many years (national standards require it to be replaced every six months), which does not achieve the effect of discharging static electricity.
3. Anti-static shoes and clothes are not worn at the same time. In addition to wearing anti-static shoes, people must wear anti-static work clothes to better control the static electricity of the human body. Because clothing can bring high static electricity during the friction of sports, especially most of the clothing nowadays are chemical fiber, which can generate thousands of volts of static electricity.
The production site test proves that if people only wear anti-static work clothes without anti-static shoes and without good anti-static ground, the anti-static effect cannot reach the standard.
Eliminating static electricity is a long-term systematic project. So, the decoration of hardware alone is not enough. There are also professional anti-static specifications that everyone must follow. How often do electrostatic products be tested?