How effective is the ion fan in removing static electricity?
How effective is the ion fan in removing static electricity? "The ion fan pays the same attention to the ESD performance and pollution control of products and equipment. The clothing and materials in the clean room are best made of static dissipative materials and can be grounded." Runfengyuan ion fan manufacturer professionally believes.
Other industries, especially in the head drive industry, use more cleanroom antistatic materials. In the past, the head drive industry only used ESD control technology in the production of ICs (chips, microchips). But now more industries have adopted ESD control technology.
The electronics industry faces enormous challenges because of the effects of electrostatic discharge (ESD) on precision circuits and disks. They will lose billions of dollars every year. A voltage of just 5V can damage those tiny and delicate components, and a voltage of less than 100V can make an entire electronic circuit useless.
In areas affected by ESD, cleanroom managers have to consider the percentage of failures and damage caused by ESD on the production line.
However, ESD control materials are prone to contamination - static dissipative materials are a major source of dust and chemical contamination in cleanrooms. For ESD control, items in the cleanroom are composed of static dissipative materials that prevent ESD and electrostatic attraction. Choosing the right anti-static ion fan supply for a cleanroom can be a big challenge. However, the solution to ESD is more complicated than finding static dissipative materials. Therefore, experts recommend a set of ESD control procedures.
Available technologies
Products designed for static dissipation can be used in cleanrooms: cotton swabs, wipes, glue, cloth, wall materials, wrist straps, gloves, work clothes, etc. However, static dissipative materials can also create contamination, and many cleanroom products made of plastic or stainless steel can accumulate or conduct electricity
Manufacturers of ESD products have had difficulty developing new static dissipative materials. ICs are getting smaller and electrostatic susceptibility is increasing. In the past three years, many electronic manufacturers have also begun to require more ion blower ESD products.
Finding the right anti-static raw material can be difficult. The mask is made of plastic with good abrasion resistance, low volatiles and chemical resistance, making it a good material for cleanrooms. It is difficult to find very transparent raw materials. Additives and copolymers render the material opaque due to the composition containing different refractive indices. Also, the plastic must have good surface resistance.
Electrostatic adsorption
Decontamination is difficult in cleanrooms due to the presence of static electricity. Dust particles are always easy to stick to the silicon wafer due to the effect of static electricity, resulting in product damage and reduced yield.
Our biggest problem was finding antistatic materials suitable for cleanroom use. In the LCD industry, the larger the glass substrate, the greater the ability to attract electric charges. Due to the large size of the substrate, any contamination may result in a lower yield.
Like other pollution control industries, the LCD industry is always looking for new materials that can solve ESD problems. Materials used in cleanrooms are also more likely to use anti-static ion fans, and new materials can also be tried to replace traditional materials on cotton swabs and wipes.
fit
Why are there no suitable ESD products in cleanrooms? In the past 3 to 5 years, manufacturers have realized that ESD products are needed in cleanrooms when they provide products for cleanroom use. However, finding ESD products that can be used in clean rooms is a problem. Because the performance of many ESD products used in clean rooms is not stable enough.
The biggest challenge in ESD control in a cleanroom is the movement of people in the cleanroom. Because people wear a lot of polyester fabrics, a lot of electric charge is generated. The only way to remove this charge in a clean room is to ground it.
In the past five years, it has been found that work clothing systems made of carbon fiber and fabric blends can provide ISO5 (Class100) clean room requirements.
All parts of these garments have the same conductivity and have conductive connections from the hood to the soles of the feet. People working in clean rooms can wear such clothes and walk through the grounding of the conductive sole instead of the grounding wire, so that the length of the grounding wire is not limited.
The emergence of this type of workwear is the result of high demands on the product, helping to reduce the low yields and high defective product rates due to ESD problems in cleanrooms.
There is no cheap and quick fix for ESD ion blower control. The key is to control ESD, such as suspending laminar ion blowers, or installing ion blowers next to materials that require ESD control. As the size of the chip (IC) decreases, it becomes more sensitive to ESD. Now, the control of ESD is not limited to the protection of the working network, but also needs to control the wafer and the personnel producing the wafer. Many high-standard companies are controlling ESD in this way.