Main measures for electrostatic protection
Electrostatic protection is a long-term system engineering. Any mistake or omission in any link will lead to the failure of static protection work.
The main measures for electrostatic protection during production are electrostatic leakage, dissipation, neutralization, humidification, shielding and grounding.
The human body electrostatic protection system mainly consists of anti-static wrist straps, ankle straps, overalls, shoes and socks, caps, gloves or finger sleeves. It has functions such as electrostatic leakage, neutralization and shielding. [1]
Ground anti-static treatment mainly includes anti-static ceramic steel-based composite raised floor, anti-static all-steel raised floor, anti-static porcelain floor tile and so on.
Ground
Grounding is very important to reduce the static charge generated on the conductor, which is the conductor and is the source of the main static electricity. Therefore, we must reduce the static charge generated by people who are exposed to sensitive anti-static components or components. It is better to prevent the generation of static electricity on the human body through the grounding of 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 remove the static charge from your body, and the proper use of a wrist strap requires proper contact with the skin. A dirty or loose wrist strap may retain the static charge that is leaking, rendering the anti-static control ineffective. Conductive footwear or foot grounding can be used or supplemented with insufficient wrist straps.
Workstation grounding device
Conductive or static dissipative work surfaces are an integral part of an electrostatic safety workstation, especially where hand assembly occurs, when using a wrist strap, for a clean work surface and properly grounded to a common point Essentially, conductive or static dissipative materials can generate static charges, but when properly grounded, they can effectively drain static charges.
shield
The next concept is to isolate the components and components during storage or transportation. Isolation from charged objects or charged electrostatic fields. Insulation is a better way to prevent electrostatic discharge damage from occurring during storage or transportation. Since grounding cannot remove static charge or insulators, it is necessary to isolate sensitive components and components from them. Reducing conventional plastics and other types of insulators in stationary, shipping, and handling areas is a better way to isolate products from insulators. Isolation can also be done by limiting access to the entire work area or workstation.
Finally, we take advantage of the fact that static charges cannot enter a container made of a conductor material or a conductor layer. 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 and that these containers will be isolated from electrostatic discharge injuries. Faraday cups This type of Faraday cup is commonly used to control electrostatic discharge. It is a metal bag, a conductive bag, and a covered turnover box. These Faraday cups can carry these static charges on the surface and remove them before opening.
neutralize
With the static elimination device, the main component is an ion generator.
Neutralization is important because grounding and isolation will not release charge from insulators such as synthetic cloth or conventional plastics. The charge that is naturally generated during the process is neutralized or removed from the insulator and is called ionization. Ions are simple charged substances that are present in the air. Ions are produced by natural energy sources. They include sunlight, illumination, open flames and radiation. We can generate trillions of ions through the ionizer. The ionizer uses a high voltage to create a balanced mixed charged ion, and a fan helps the ion drift to neutralize on the object or region. Ionization neutralizes the static charge on the insulator in eight seconds, thus reducing their potential damage. By ionization, the combination is not a substitute for grounding or isolation, ionization only reduces the likelihood or risk of an electrostatic discharge accident.