The main measures of anti-static
It can be divided into the prevention of static electricity generation and the prevention of static electricity damage.
Electrostatic protection is a long-term systematic project, and any mistake or omission in any link will cause the failure of electrostatic protection.
The main measures of electrostatic protection during the production process are electrostatic leakage, dissipation, neutralization, humidification, shielding and grounding.
The human body electrostatic protection system is mainly composed of anti-static wrist straps, ankle straps, work clothes, footwear, caps, gloves or finger cots, etc. It has the functions of static leakage, neutralization and shielding. [1]
The ground anti-static treatment mainly includes anti-static ceramic steel-based composite raised floors, anti-static all-steel raised floors, and anti-static ceramic floor tiles.
Grounded
Grounding is very important to reduce the static charge generated on the conductor. The human body is a conductor and the main source of static electricity. Therefore, we must reduce the static charge generated on people who touch sensitive anti-static components or components. The best way to prevent static electricity on the human body is to ground the human body.
Several personal grounding devices:
In the industry, the wrist strap is the most commonly used grounding device. The wrist strap will safely and effectively drain away the static charge on your body. To play the role of a wrist strap reasonably, it needs to be in contact with the skin reasonably. A dirty or loose wrist strap may retain the leaked static charge, rendering anti-static control ineffective. Conductive footwear or foot grounding can be used or supplement the lack of wrist straps.
Electrostatic grounding clamp
Electrostatic grounding clamp
Workstation grounding device
Conductive or static dissipative work surface is an essential part of an electrostatic safety workstation, especially those where hand assembly takes place. When using a wrist strap, it is necessary to clean the work surface and properly connect to a common point for grounding. Necessary, conductive or static dissipative materials can generate static charges, but when they are properly grounded, they can effectively leak static charges.
shield
The next concept is to isolate vital parts and components during storage or transportation. Isolate from charged objects or charged electrostatic fields. During storage or transportation, insulators are the best way to prevent electrostatic discharge damage from occurring. Since grounding cannot drain away static charges or insulators, it is necessary to isolate sensitive vital parts and components from them. Reducing conventional plastic and other types of insulators in static work, shipping, and handling areas is the best way to isolate products from insulators. Isolation can also be accomplished by restricting access to the entire work area or workstation.
Anti-static shoes
Anti-static shoes
Finally, we take advantage of the fact that static charges cannot enter containers made of conductive materials or conductive layers. This effect is called the Faraday Cup effect. When storing and transporting electronic components or loading circuit boards, ensure that containers with similar Faraday cup characteristics are used. These containers will be isolated from electrostatic discharge injuries.
Faraday Cup
This type of Faraday cup is usually used to control electrostatic discharge. It is a metal bag, a conductive bag, and a turnover box with a lid. These Faraday cups can carry these electrostatic charges on the surface and remove it before opening.
neutralize
Using static elimination equipment, its main component is an ion generator.
Since grounding and isolation will not release charge from insulators such as synthetic cloth or conventional plastics, neutralization is important. The neutralization or removal from the insulator is called ionization. Ions are simply charged substances in the air. Ions are produced by natural energy substances, including sunlight, lighting, open flames and radiation. We can generate trillions of ions through an ionizer. The ionizer uses high voltage to generate a balanced mixture of charged ions, and uses a fan to help the ions drift to objects or areas to neutralize them. Ionization can neutralize the static charge on the insulator within eight seconds, so it can reduce their potential damage. Neutralization by ionization is not grounded or isolated
Anti-static brush
Anti-static brush
An alternative to ionization, ionization only reduces the possibility or risk of electrostatic discharge accidents.