The national standard for pure water: GB1146.1-89 to GB1146.11-89, at present, China's high-purity water standards are divided into five levels: Class I, Class II, Class III, Class IV and Class V, the standard is based on the ASTM electronic level standards.
In industrial pure water production, water quality standards in the specifications set out in the electronic (microelectronics) components (or materials) should be based on the production process. For example, it is generally accepted that the size of the particulate matter that causes damage to the performance of a circuit is 1/5-1/10 of its line width. however, due to the complexity of microelectronic technology and the wide range of factors affecting product quality.
At present, there is no complete set of water quality standards applicable to the production of a particular process test circuit. With the continuous revision of electronic water quality standards and many breakthroughs and developments in the field of high-purity water analysis, the continuous application of new instruments and analytical methods for the development of water purification processes to create the conditions.
Expanded Information:
Industrial pure water production process:
In the production process of industrial pure water, the anions and cations in water can be removed by electrodialysis, reverse osmosis and ion-exchange resin technology; particles in water can be removed by ultrafiltration and membrane filtration; bacteria in water can be disinfected mainly by adding medicines or by the current UV lamp irradiation or ozonation. toc is usually treated with activated carbon and reverse osmosis treatment.
In high-purity water applications, the purity of pure water is directly related to the performance, reliability and threshold voltage of the equipment, resulting in low material breakdown, defects and minority carrier lifetime. Therefore, high purity water requires high purity and high precision.
Baidu Encyclopedia - Pure Water
Baidu Encyclopedia - Water Quality Standards