[China Aluminum Network] The main function of the purification plant is to control the cleanliness and temperature and humidity of the atmosphere that products (such as silicon chips, etc.) are exposed to, so that the products can be produced and manufactured in a good environmental space. This space we call The purification plant. According to international practice, the level of dust-free purification is mainly based on the number of particles per cubic meter of air that is larger than the standard of separation. In other words, the so-called dust-free is not 100% without a little dust, but it is controlled in a very small amount of units. Of course, the dust-compliant particles in this standard are already small relative to our common dust, but for optical construction, even a little bit of dust has a very large negative impact, so in the production of optical construction products , Clean room dust is an inevitable requirement.
The number of fine dust particles with a particle size of less than 0.3 microns per cubic meter is controlled at less than 3,500, which has reached the Class A of the international dust-free standard. At present, the dust-free standard applied to the clean room in the chip-level production and processing is higher than the A-level requirements for dust, and such high standards are mainly applied to some higher-level chip production. The amount of fine dust of 5μm and below is strictly controlled within 1000 per cubic meter, which is also commonly known as the 1K level in the industry.
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