According to the standards promulgated by the US government, dust-free workshops can be divided into six levels. They are Level 1, Level 10, Level 100, Level 1000, Level 10000, and Level 100000:
Level 1 dust-free workshops are mainly used in the microelectronics industry to manufacture some integrated circuits, while relatively The precise requirements for integrated circuits are sub-micron.
Level 10 clean rooms of this level are mainly used in the semiconductor industry to process materials with a width less than 2 microns.
Many people think that Class 100 dust-free workshops are the most commonly used and the most important. People mistakenly believe that Class 100 clean rooms are meant to illustrate the relatively high requirements for a sterile environment. Generally speaking, Class 100 clean rooms are used for sterile manufacturing in the pharmaceutical industry, and are mostly used in surgical operations, such as the isolation treatment of bone marrow transplant patients after surgery.
Grade 1000 is generally used to produce relatively high-quality optical products.
The 10,000-level and 10,000-level dust-free workshops are largely used for the assembly of hydraulic equipment or backlog equipment. Of course, it is sometimes used in the food and beverage industry, and it is also very common in the medical industry.
The 100,000-level dust-free workshop is used in many industrial sectors, such as when manufacturing optical products, and sometimes in the manufacturing of smaller components. Of course, food and beverage processing and pharmaceutical industry production will also use this level of dust-free workshops.
The so-called dust-free workshop is an artificial environment, and the particles contained in it are far lower than the general environment. With the rapid growth of integrated circuit technology, the requirements for the cleanliness of the manufacturing environment (dust-free workshop) have also increased. Due to the requirement of quietness, in industry, even if the particle size is less than 1 micron, it may hinder the operation of the product or reduce its life. Due to the rise of nanotechnology, the critical dimensions of semiconductors continue to shrink, and the concentration of integrated circuits continues to increase. Dust particles are more likely to cause chip failure or worsen reliability. For example, when metal dust particles fall onto metal wires, they may cause a short circuit in the metal wires. In addition, if acidic ionic compound dust particles fall on metal wires, they may corrode them, so dust-free workshops are an indispensable element for integrated circuit manufacturing.
The higher the ranking, the higher the level. Level 1 is the highest level, and the most common ones are level 100 to level 100,000. Requirements for the use of dust-free workshops: maintain the cleanliness of the dust-free workshop, and people entering and exiting have certain dress regulations; for levels 10000 and 100000, they must wear dust-free robes, dust-free shoes, hats and masks; for level 1000 (inclusive) Above, you need to wear a special clean jumpsuit, dust-free shoes to cover your whole body, and wear gloves and a mask.
Reference: Dust-free workshop-Baidu Encyclopedia