Prevention of static electricity! What should we pay attention to?
What is the form of static damage to electronic products?
The basic physical properties of static electricity are: attraction or repulsion, and there is a potential difference from the earth, which will generate a discharge current. The three effects of these three features on electronic components:
1. Electrostatic adsorption of dust reduces component insulation resistance (short life).
2. The electrostatic discharge is destroyed, so that the component is damaged and cannot work (complete destruction).
3. The heat generated by an electrostatic discharge electric field or current causes the component to be injured (potentially damaged).
4. The electromagnetic field generated by electrostatic discharge has a large amplitude (up to several hundred volts/meter) and an extremely wide spectrum (from tens of megahertz to several gigahertz), causing interference or even damage to the electronic device (electromagnetic interference).
If all components are destroyed, they must be detected and eliminated in production and quality control. The impact is small. If the components are slightly damaged, they are not easy to find under normal test. In this case, they are often processed through multiple layers. When it is already in use, it is found that damage is not easy to check, and its loss is difficult to predict. It takes a lot of manpower and financial resources to find out all the problems, and if you detect the failure when you use it, the loss will be huge.