The so-called static electricity refers to the phenomenon of electrification caused by excess or lack of electrons on the surface of an object. The number of surplus electrons or the number of insufficient electrons determines the amount of surface charge. Excess electrons on the surface of an object are called negatively charged, and insufficient electrons are called positively charged.
Static electricity is like bacteria. Although it is invisible and intangible, it exists anytime and anywhere. In daily life, except for occasional light shocks or electrostatic adsorption, static electricity does not seem to be a big deal to most people. However, many electronic components can be damaged or destroyed by electrostatic discharge far below what people can feel. The components installed on the printed circuit board (circuit board) are more dangerous to be damaged due to ESD (Electro Static Discharge), because each printed line (or wire) is connected to several components Channel, discharging this line will immediately affect several components instead of just one. Regarding the use of wireless anti-static wrist straps, the current ESD practitioners of individual companies asked whether wireless anti-static wrist straps are suitable for electronic companies when asking questions. Then the editor will analyze the applicability of anti-static wrist straps for everyone Have a deeper understanding of the difference between wireless and wired anti-static wrist straps, so as to improve the deficiencies in the field.
Wired anti-static wrist strap
Composition: Grounding wire with 1MΩ resistance (including alligator clip), wrist ring
Main function: Safely conduct the excess charge on the human body through the wrist strap/grounding system, and realize the equipotential connection between the personnel and the grounding system
Wireless anti-static wrist strap
Composition: wrist ring, metal wire or 1MΩ resistor (the cheap one on the market)
Working principle: Using the corona discharge effect and the principle of tip discharge, when the accumulated charge exceeds a certain value, it is discharged into the space due to the potential difference, so as to achieve the purpose of eliminating static electricity.
Common types of anti-static products are:
①Anti-static wrist strap: It is widely used in various operating positions. There are many types of wrist straps. Generally, wrist straps with I megaohm resistance are used, and the cord length should be left with a certain margin.
②Anti-static shoes: After using the anti-static floor in the workshop, wear anti-static shoes to reduce the introduction of dust.
③Anti-static table mat: It is used to lay the surface of each worktable. Each table is connected with an anti-static ground after a 1 megohm resistor is connected in series.
④Anti-static paint: Anti-static paint can be used on various floor surfaces, and can also be applied to various shelves, turnover boxes and other containers.
