Electrostatic technology knowledge
The main measures of static control are: leakage and dissipation of static electricity, static neutralization, electrostatic shielding and grounding, humidification, etc.
Component breakdown damage caused by electrostatic discharge is the most common and serious electrostatic hazard in the electronics industry. It is divided into hard breakdown and soft breakdown. Hard breakdown is a one-time breakdown of the component dielectric, burnt or permanent failure; soft breakdown is caused by device performance degradation or parameter indicators.
Antistatic loading boxes, component boxes, turnover boxes, turnover trays, etc. must be used for the transfer and storage of electrostatic sensitive components and printed circuit boards between processes. To prevent the accumulation of static electricity and cause harm. Electrostatic sensitive components and printed circuit boards must be used as anti-static shielding bags, packaging bags, packaging boxes, strips, baskets, etc. to avoid static damage during transportation.
In the production process of electronic products, the finished components and components are often in contact with and separated from equipment tools, and static electricity is generated. Antistatic seat cushions, turnover trolleys, maintenance kits, tools, work chairs (stools), etc. must be used. Static electricity is quickly vented by proper grounding.
Friction and static electricity are two major sources of harm in the electronics and microelectronics industries, but the generation of static electricity is not a hazard. The danger lies in the accumulation of static electricity and the resulting electrostatic charge discharge, so it must be controlled. An electrostatically charged object forms an electrostatic field around it, which produces mechanical effects, discharge effects, and electrostatic induction effects. Due to the mechanical effect of static electricity, floating dust particles in the air will be adsorbed to electronic components such as silicon wafers, which seriously affect the quality of electronic products. Therefore, anti-static measures must be taken for purifying the working space.
The walls, ceilings and floors of the clean room should be made of anti-static, non-dusting materials. For the operators and workpieces, to understand the static electricity generation during the production process, to determine the degree of static electricity in the production process and to check the static protective equipment and equipment. Quality requires measurement of static electricity and related parameters. The measurement of static electricity is mainly the measurement of electrostatic voltage, material resistance, grounding resistance, electrostatic shutdown period, electrostatic quantity, static elimination performance, and charge surface density of cloth.
Electrostatic protection work is a systematic project. Any omission or mistake in any link will lead to the failure of static electricity protection work. It must be guarded from time to time and everyone should be prevented.