Semiconductor compressed air standards are a series of strict specifications formulated to ensure the quality of semiconductor products and the stability of the production process. These standards cover a number of key indicators of compressed air, including particulate matter, humidity, oil content, microorganisms, chemical pollutants and dew point. The following is a detailed summary of these criteria:
1. particulate matter
- standard requirements: The particulate matter in the semiconductor compressed air must be very small, and the particulate matter concentration is usually less than 100 pts/cubic foot (or lower) to ensure the cleanliness of the production environment and the quality of the product.
- Importance small particle contamination can lead to failure of semiconductor products, so particle control is a key part of semiconductor compressed air standards.
2. humidity
- standard requirements: The humidity in the semiconductor compressed air must be strictly controlled, and the relative humidity is usually required to be lower than 50% to prevent the product from being affected by moisture. For certain high-end applications, such as chip manufacturing, lower humidity levels may be required.
- control method: Effective control of humidity is achieved through equipment such as dryers to ensure that compressed air meets production requirements.
3. oil content
- standard requirements: The oil content in semiconductor compressed air must be very low, usually the total oil content is less than 1ppm, and even in some high-end applications, grade 0 oil-free compressed air is required.
- Importance: Oil will cause pollution to semiconductor products and affect the quality and performance of the products, so the control of oil content is very important.
4. of microbial and chemical contaminants
- standard requirements: The microbial and chemical pollutants in the semiconductor compressed air must be controlled, and their concentration is usually required to be lower than a certain standard to prevent the product from being affected.
- control method through filtration, adsorption and other purification measures to reduce the content of microbial and chemical pollutants.
5. dew point
- standard requirements for the semiconductor industry, the pressure dew point of compressed air is usually higher, such as -70 ℃, -80 ℃ or even lower (such as -110 ℃, -120 ℃), depending on the specific application requirements and product accuracy requirements.
- Importance: The low dew point can ensure that the moisture content in the compressed air is extremely low, preventing the product from moisture, corrosion and other problems.
6. other requirements
- gas purity in addition to the above indicators, the semiconductor industry also requires compressed air to have a certain degree of gas purity, such as nitrogen, oxygen and other gases are relatively high purity requirements to prevent other gas components from polluting the product or affecting the performance of the product.
- inspection and maintenance: In order to ensure that the quality of compressed air meets standards, semiconductor manufacturing companies usually test and maintain compressed air. Inspection methods include the use of gas analyzers to detect particles, moisture content and oil content; maintenance methods include regular replacement or cleaning of filters, lubricants and other key components.
In summary, the semiconductor compressed air standard is a series of strict and meticulous specifications designed to ensure the quality of semiconductor products and the stability of production. These standards cover a number of key indicators of compressed air, and through a variety of control methods and purification measures to achieve strict control of compressed air quality.
