Principle analysis of electrostatic damage to PCB board
A few days ago, a customer who produced PCB boards asked me what kind of anti-static products to use. When it comes to electronic products such as PCB boards, if there is no problem in R&D technology, once a failure occurs, it is mostly related to static electricity. As we all know, static electricity is everywhere. For some tiny electronic components, as long as they are broken down by static electricity, the entire production line will also face collapse.
What effect does static electricity have on electronic components?
The basic physical characteristics of static electricity are the following three: attraction or repulsion, there is a potential difference with the earth, and a discharge current will be generated. The effects of these three properties on electronic components:
1. The electrostatic adsorption of dust reduces the insulation resistance of components, thereby shortening the life of components.
2. The heat generated by electrostatic discharge or current can cause potential damage to components.
3. The electromagnetic field generated by electrostatic discharge has a large amplitude and a very wide spectrum, causing interference or even damage to electronic devices.
4. Electrostatic discharge damage, so that the components can not work due to damage.
It can be seen that the hazard of static electricity is immeasurable, and enterprises should do a comprehensive protection work to prevent the loss caused by static electricity. For example, employees wear anti-static clothing, anti-static wrist straps, and anti-static heel straps. The equipment uses anti-static table mats and anti-static floor mats.
The use of ion fans can also effectively eliminate static electricity in production.
