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---Causes of static electricity in clean room
In the high-tech electronic product factory, the control of static electricity is the basis of improving production efficiency, improving quality and increasing profits. Electrostatic control is one of the basic production conditions in semiconductor, hard disk and planar display (FPDs) production. Failure to control static electricity means that the product will be damaged by particle contamination and electrostatic discharge caused by electrostatic attraction. Both the product itself and the working environment inevitably use insulation materials, many of which are an integral part of the product itself. For example, silicon wafers containing oxide layers are used in the manufacturing of high-tech products, epoxy-encapsulated semiconductor devices, insulation materials on device pins, epoxy printed circuit boards, and glass sheets in the FPDs industry. In addition, teflon, quartz, and many plastic materials have high temperature resistance, corrosion resistance, and cleanroom compatibility, but they are all insulating materials. Grounding does not eliminate electrostatic charges on insulating materials, so in most cases the only option is electrostatic neutralization using air ionization.
---aeroionization
The word "Ion" comes from the Greek language, originally a verb, is the meaning of action, has the meaning of traveler. The term was first used to describe the effect of applying electricity to different solutions: molecules will ionize and move toward the electrode opposite themselves. Swedish scholar S. A. Arrhenius' theory believed that A moving ion (ION) is an atom with an electric charge, which was confirmed after the discovery of electrons. An ion can be defined as an atom or molecule that has lost or gained electrons. Electrons are the only carriers of charge transfer. When an atom or molecule has the same number of electrons and protons, its charge is balanced, or neutral. If an electron is lost, the atom or molecule becomes positively charged and becomes a positive ion. They gain electrons and become negative ions. This is not the case with air ions, or charged air molecules. Air is a mixture of nitrogen, oxygen, carbon dioxide, water vapor, and some other trace gases, one or more of which can be ionized. At some point, diatomic molecules of gas, including nitrogen and oxygen, can gain or lose electrons, as can complex gases such as carbon dioxide. In any case, when one or more gas molecules in the air gain or lose electrons, we call it air ionization. Unlike solution ions, air ionization requires a certain amount of energy to form. Normally, in unfiltered air, the air ions come in clumps of gas molecules, 10 neutral gas molecules wrapped around a charged molecule. The charged molecules may be molecules of oxygen, water, or nitrogen. In this case, we call them small air ions. Small air ions move relative to each other, and when they encounter an ion of opposite charge or a ground surface, they lose their charge and return to neutral molecules. In clean air, the life of small air ions is between a few seconds and a few minutes. Under the right conditions, these ions will be adsorbed to particles or large molecular clusters in the air, thus forming large air ions.
---Working principle of AP-DB1223 space i
AP - ion DB1223 space bar to use dc high voltage power supply, using special silicon, through positive and negative dc high voltage alternating effect on positive and negative coupling type needle electrode, produce corona discharge, the air ionization, produce a large number of positive and negative air ion polarity, and exists in the space of the electrostatic charge of local imbalance, to achieve efficient, reliable maintenance space electrostatic balance, Reduce the attachment of particles in the space, so that the pollution particles are easy to be filtered out by the air conditioning purification system, and reduce the purpose of particle pollution in the space.
---Test of electric elimination effect
Test standard: ANSI/ESD.STM3.1, SJ/T 11446 -- 2013
Test instrument: Trek Plate Charge Tester
Test voltage: ±1000V → ±100V attenuation
Test environment: humidity 50±5%; 23 + / - 3 ℃ temperature
HEPA (FFU) airflow velocity: 0.35-0.5m/s;
Operating frequency: 5Hz
