What does it mean to discharge static electricity in clean room purification project
Accidents caused by static electricity in dust-free workshops often occur, so how to prevent static electricity in dust-free workshops has become an aspect that cannot be ignored.
The so-called static electricity is because the friction and other reasons destroy the uniform (+)-negative electric charge in the object, which is equal to the uniform electric neutral state, so that the charge is excessive, and the object is in a charged state. Because these charges do not flow normally, so Called static electricity.
The accidents caused by static electricity in the clean room are as follows:
1. Electrostatic shock caused by static electricity can cause people's insecurity and fear, and can cause secondary injuries (such as a person falling due to an electric shock, which is caused by a fall and injury);
2. The discharge current caused by electrostatic discharge can cause damage and malfunctions such as semiconductor components. For example, put 50 P-MOS circuits in a plastic bag and shake it several times. Block, the failure rate reached 78%, because semiconductor devices are very sensitive to electrostatic discharge;
3. Electromagnetic waves generated by electrostatic discharge can cause noise and malfunction of electronic instruments and devices;
4. The light emission of electrostatic discharge can cause photodestructive damage such as photographic limbs;
5. The static mechanical phenomenon can cause the sieve holes to be blocked by dust, disordered spinning yarns, uneven shades of printed matter and product pollution;
6. The most dangerous disaster caused by electrostatic discharge is an explosion caused by a fire source well that becomes a combustible material. For example, according to foreign literature statistics, 36 out of 86,000 explosion explosive anesthetics were used in the operating room, of which 21 were caused by static electricity. ;
The occurrence of electrostatic accidents mainly lies in the generation and accumulation of static electricity, and the flow of airflow, friction between airflow and pipes, tuyeres, filters, etc., friction between human body and clothes, friction between clothes, grinding in process, spraying, jet, washing , Stirring, bonding, peeling, etc., all of them may generate static electricity. In general, the smaller the non-conductor (insulator) with lower electrical conductivity, the less likely it is to flow after the charge is generated, so it is more likely to be charged.
The problem of static electricity is particularly serious in cleanrooms, not only because of the various process factors that generate static electricity in the cleanrooms, but also because of the many materials in the cleanrooms, such as plastic flooring, wall surfaces, nylon, and indeed good work clothes. They all have high resistivity, and they are very easy to generate static electricity and collect static electricity. Before the electrostatic disasters in the clean room were not taken seriously, these materials are widely used Class 1 ~ 100