Cleanroom Air Shower and Pass-through Box
1. Dust-free clean room air shower room and transfer window means that the particles in the air within a certain space, air shower room and transfer window can remove bacteria and pollutants in the dust-free clean room, and the indoor temperature, Cleanliness, indoor pressure, air velocity and air distribution, noise, vibration, lighting, and static electricity are controlled within a certain range of requirements, and a specially designed dust-free clean room is given.
2. The principle of dust-free cleanroom air shower room and pass through. The clean room air shower room and the passbox use HEPA and air purification equipment, and the dust collection rate is as much as 99.97~99.99995%, so the air filtered by this filter can be said to be very clean. However, in the clean room, in addition to the air shower and the transfer window, there are also high-efficiency filters and high-efficiency air outlets. In addition to people, there are sources of dust in the clean room, such as machines. Once the generated dust spreads, the clean space cannot be maintained, so it must The airflow is used to quickly exhaust the generated dust outdoors.
3, dust-free clean room air shower room and transfer hatch three dust. There are three principles for a dust-free clean room: dust-proof, dust-carrying, and dust-producing. As one of the buffer passages into the clean room, the air shower room is one of the better purification equipment to control dust. It can greatly reduce the pollution problems caused by employees entering and leaving the clean room. The two doors of the air shower room are electronically interlocked, which can double as an air lock room, preventing external pollution and unpurified air from entering the dust-free clean area, and achieving the clean production environment required by the production workshop.
4, the main function of the dust-free clean room air shower room and the transfer window is to control the cleanliness of the atmosphere and the temperature and humidity of the products (such as silicon chips, etc.), so that the products can be produced and manufactured in a good environmental space. We call this space a clean room. According to convention, the level of dust-free purification is mainly based on the number of particles per cubic meter of air whose diameter is larger than the division so that the air shower room and the transfer window meet the standard. That is to say, the air shower room and transfer window used in the so-called clean room are not 100% free of dust, but also need to add an FFU filter unit and a high-efficiency air supply port, but is controlled in a very small unit. Of course, the particles that meet the dust standard in the air shower and transfer window are very small compared to our common dust, but for the optical structure, even a small amount of dust will have a very large negative impact, so in In the production of optical structure products, dust-free is an inevitable requirement.
For the dust-free clean room, the air shower room and the transfer window control the number of fine dust with a particle size of less than 0.5 microns per cubic meter to below 3,500, which has reached the dust-free standard A level. At present, the dust-free standards applied in chip-level production and processing have higher requirements for dust than Class A, and such high standards are mainly applied to the production of some higher-level chips. The amount of fine dust is strictly controlled within 1,000 per cubic meter, which is also known as the 1K level in the industry.
Basic knowledge of dust-free clean room air shower room and transfer window:
People entering and exiting the clean area must be carried out according to the following procedures and requirements.
People enter-change shoes-take off coat-wash hands-wear clean clothes-hand disinfection-- Air shower room; clean area-exit the door-take off clean clothes--wear coat--change shoes---people out of disinfectant The preparation is managed by the person in charge, and the 0.3mm disinfectant is used for disinfection.
The logistics entering the clean area must be carried out according to the following procedures and requirements: Items-Take off the outer packaging room--Air shower transfer window-Clean area-Double flow transfer window-Pack cargo shower room entry The parts and raw and auxiliary materials in the clean area must be removed from the outer packaging and passed through the double-layer transfer window. The produced products must be packaged and sealed and flow out from the transfer window; after get off work every day, the operator should clean the work surface, floor, and stool.
Clean the wall and ceiling once a week, and fill in the "Clean Workshop Hygiene Record".