The need for anti-static products
The basic physical properties of static electricity are the following three types: attraction or repulsion, and a potential difference from the earth, which generates a discharge current. The impact of these three characteristics on electronic components:
1. Electrostatic adsorption of dust reduces the insulation resistance of components, thus shortening component life.
2. The heat generated by electrostatic discharge or current causes potential damage to components.
3. The electromagnetic field generated by electrostatic discharge has a large amplitude and a wide spectrum, which causes interference or even damage to the electronic device. 4. The electrostatic discharge is destroyed, and the components are damaged and cannot work.
It can be seen that the electrostatic hazard cannot be estimated, and enterprises should do a comprehensive protection work to prevent the damage caused by static hazards.
Common anti-static products include: anti-static block and transparent pc anti-static board, anti-static clothing, anti-static workbench, anti-static screen, anti-static mat, anti-static stool and anti-static chair and so on.
Anti-static common sense: Static electricity is an objective natural phenomenon, which is produced in many ways, such as contact, friction, and rushing. The basic process of its generation can be summarized as: contact charge transfer electrical layer to form charge separation. Static electricity on devices or humans can range from tens of thousands of volts to hundreds of thousands of volts, often ranging from hundreds to thousands of volts under normal operating conditions. The human body can carry thousands of volts or even tens of thousands of volts of static electricity due to its own actions and contact with other objects, friction or induction. Static electricity is the result of a loss of balance between positive and negative charges in a localized range. It is a kind of electric energy, which remains in the performance of objects, and has the characteristics of high potential, low electric quantity, small current and short acting time.
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. > Electrostatic sensitive components and printed circuit boards must be transported and stored in the production process, such as anti-static loading boxes, anti-static component boxes, turnover boxes, and turnover trays. 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. Anti-static, non-dusting materials should be used for walls, ceilings and floors of clean room. A series of static protective measures should be taken for operators, workpieces and appliances, such as anti-static lift chairs, anti-static work chairs, anti-static Chair, anti-static stool, anti-static leather chair, anti-static chair. In order to understand the electrostatic charging situation in the production process, to determine the degree of static electricity in the production process and to verify the electrostatic protection products and equipment quality, it is necessary to measure 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.