Electrostatic phenomena The electrical energy that humans can distinguish can be roughly divided into three categories; AC, DC, and static electricity.

Static electricity can move and store energy in insulating materials, a natural phenomenon that is not reasonably explained in physical theory.

The particularity of ESD/EOS: First, the generation and accumulation of static electricity require certain conditions and processes, so unprotected products are not likely to be damaged by ESD/EOS, with a certain degree of contingency; Secondly, due to the low energy of ESD/EOS in most cases, those who are injured by ESD/EOS are not immediately scrapped. Some only show increased electrical leakage, unstable operation, or even inconspicuous performance during factory testing. Later, problems are easily attributed to poor materials or poor design without self-examination. Therefore, people often fail to recognize the hazards of ESD/EOS and take chances.