Clean Room Application Error

The clean room originated in the medical industry and developed in the microelectronics industry. With the advancement of science and technology, the requirements for the cleanliness of ambient air are getting higher and higher in the scientific research and production process.

There are more and more industries that use modular clean rooms. At present, clean rooms are widely used in microelectronics, optoelectronics, medicine, medical, microbiology, instruments, instrumentation, aerospace, aviation, food, health care products, cosmetics and other industries. However, for various reasons, there are some misunderstandings in the application of clean rooms. The common misunderstandings are as follows:

1、I want to use it, not what I want to use.

This phenomenon exists in the instrumentation, food, medicine, health care products, cosmetics and other industries.

Some users of clean rooms don't know why they need a clean room, they don't know what the clean room is, and they don't know how to meet them. Only know the requirements of technical standards or management departments. In order to obtain a production license, or to cope with inspections, the application of a clean room is constructed. As a result, the clean room has its name.

2、Acceptance is acceptable and everything is fine.

Some people think that if the clean room is qualified, everything will be fine. actually not. The completion acceptance of the clean room is mostly carried out under air conditions, and the cleanliness measured is the cleanliness under empty conditions. Cleanliness under dynamic conditions is the cleanliness that affects scientific research and production. The cleanliness under dynamic conditions may be completely different from the cleanliness under open conditions.

There are many factors affecting cleanliness under dynamic conditions, such as pollution of workers, pollution of production equipment, pollution of production materials, pollution of production processes, and so on. Therefore, it is necessary to analyze, research, and control pollution sources. The cleanliness under dynamic conditions is controlled to the extent permitted by the work.In order to prevent system changes, we must constantly monitor, find problems in time, and solve problems.

3、Use only, do not monitor.

The pollution emitted by the pollution source may affect the product quality and the pass rate. The filter material may rupture and leak, which affects the cleanliness. The amount of air supplied changes, which may affect the cleanliness. Improper management may affect cleanliness. Changes in external conditions may also affect cleanliness. Therefore, there should be clean rooms should always check the cleanliness of the clean room.

General clean rooms need to be tested regularly, some need to be tested once a day; some need to be tested once a week; some need to be tested once a month. The specific inspection cycle should be determined according to the cleanliness level of the clean room. Generally, the clean room with a high cleanliness level has a short detection period. The demanding clean room requires continuous testing to ensure that the clean room can achieve the required cleanliness every moment.

4、Only protect the product, do not protect people.

Harmful or harmless, the product is different from the person. Some substances are harmful to the product and harmless to humans; some substances are harmful to humans and harmless to the products. For example: sodium chloride is not harmful to people, and it is very harmful to microelectronics. The toxic gas produced during the production process has little effect on the product and has a great impact on the health of the production workers.

Traditional clean rooms have more considerations for product protection, and there are few or no considerations for the safety of production workers. People are the first valuable. The application of clean rooms should seriously consider protecting the health of workers. It is not only necessary to consider the quality and pass rate of products. The general clean room fresh air only accounts for 30% of the total air supply.

If more harmful gases are emitted during the production process, the following measures can be taken: (1) increase the amount of gas supplied; (2) increase the proportion of fresh air; (3) control the emission of harmful gases; (4) set up special exhaust facilities. The gas emitted from the source of harmful gas is directly discharged to the outside; (5) an air purifying device is installed to remove harmful gases.

The electronics industry, the pharmaceutical industry, and the cosmetics industry emit more harmful gases. These gases are harmful to the human body. It is more important to protect human health.

5、A source of pollution that pollutes the entire clean room.

Some companies spend a lot of money to build clean rooms. Due to improper handling of a source of pollution in the production equipment, pollutants are emitted to the entire clean room, causing the entire clean room to lose its clean function.

For serious pollution sources of production equipment, it should be done with great effort, separate treatment, and separate exhaust. In addition, low-pollution production equipment should be used whenever possible, and low-pollution production materials should be used as much as possible.

6、Just work clothes, no matter the dust on your body.

Inspections have shown that staff are the main source of pollution in cleanrooms. The work clothes in the clean room are the main means to prevent the emission of human pollutants. Different cleanliness has different requirements for work clothes. The clean room of the medicine cleansing room is not high, the work clothes are not sealed, and the underwear and body particles of the worker are easily released into the air of the clean room, thereby reducing the cleanliness of the clean room. Dust on the staff underwear is the main source of pollution.

The dander on the staff is also a major source of pollution. There are many large particles in the particles of the underwear and the body that are emitted into the clean room air, which has a great influence on the product. Therefore, the medical clean room not only has strict requirements on the cleanliness of the overalls and the killing of bacteria, but also should have higher requirements for the cleaning of the underwear and the body of the staff.

7、Use only, not manage.

Some units are only used for clean rooms and are not managed. In fact, dust accumulation, production equipment pollution, raw material pollution, worker pollution, reduced air volume, high efficiency filter leakage and other factors will reduce the cleanliness of the clean room. As a result, the quality of the product is degraded and the pass rate is reduced. Therefore, in order to ensure product quality and improve product qualification rate, the management of clean rooms should be strengthened. In general, the clean room should be assigned a responsible person to manage.