Clean technology, also known as production environment and pollution control technology, is a comprehensive new science and technology developed with high and new technology in the past two or three decades. Clean technology usually includes: air purification technology, air conditioning technology, water purification technology, gas purification technology, micro impurity control technology, clean environment monitoring technology and related environmental quality control technology. Purification engineering technology is widely used in high-tech industries such as electronics, nuclear, aerospace, bioengineering, pharmaceutical, precision machinery, chemical industry, food, automobile manufacturing and modern science fields.
For semiconductor equipment, purification engineering technology plays a very important role in microelectronics technology. The core of microelectronics technology is integrated circuit, and the production of integrated circuit puts forward strict requirements for its process environment and purification technology and equipment in the process flow. During the Ninth Five Year Plan period, China vigorously developed the information industry with microelectronics as the focus. In a sense, the level of purification engineering technology has become an important symbol to measure the level of science and technology and industrial level of a country and a region.
With the improvement of people's living standards, people put forward higher and higher requirements for living environment and quality of life. High purity water prepared by water purification equipment has been widely welcomed by people. Purification engineering technology has begun to enter thousands of households and people's modern life.

The gap between China's clean technology and equipment and foreign advanced countries is obvious. HEPA filter, which was produced in 1965 in China, is 15 years later than that in foreign countries. The light scattering dust particle counter produced in 1975 is 20 years later than that in foreign countries. 0.1 μ m clean technology and equipment has become mature technology in the advanced countries in the world, while China is just starting.

In order to adapt to the development of ultra clean technology, the world's industrial advanced countries have never interrupted the research on a large number of high-efficiency filters, and have been developing new products with different structures and performances for several years. The U.S. started to develop 0.1-micron ULPA filters since 1979, and the U.S. AAF company started to produce 0.1-micron barrier free ULPA filters in 1984. At present, the 0.1-micron ULPA filters are in the U.S. AAF. The company, Flanders and Cambridge have formed commercialized production. Japan has also become the country with the largest number of manufacturers of 0.1 μ m ULPA filter in the world, with a wide range of products and a series of products, especially the development of low-pressure loss 0.1 μ m ULPA filter successfully solved the technical problem of large initial resistance. The demand for high-efficiency air filters in the international market is large and growing every year. At present, the annual sales in Japan are more than 1 million units, and the sales amount is 200 million dollars based on the average price of each unit. China's market demand for high-efficiency air filters is close to 100000 sets per year, accounting for 2% - 4% of the international market. However, there is no 0.1 micron ULPA filter production so far. The 0.1 micron ULPA filter used in the production of ultra large scale integrated circuits and clean plants in various high-tech fields still relies on imports.
In the scale and technical level of clean room construction, there is a larger gap between China and advanced countries. Japan Shimizu construction company has undertaken 718000 square meters of clean rooms from 1982 to 1987, while the total area of clean rooms in China is less than 100000 square meters in one year, but there is a great development during the Eighth Five Year Plan period. In 1993, the total area of clean rooms has been nearly 150000 square meters. The scale of clean room construction in the United States is larger, with a total of 1885000 square meters in 1998. At the level of clean engineering technology, in the late 1980s, a large number of 0.1 micron super clean rooms have been built in foreign countries. In 1987, a class 10 clean workshop of 3000 square meters was built in Sanyo Niigata workshop of Japan, and four class 1000 workshops of 1000 square meters were built in NIT log to control 0.1 micron dust. The number of air changes was as high as 300 times / minute. The new TSMCs plant in Taiwan in the United States has completed the fourth generation of pipeline type cleanrooms with a total area of 10000 square meters. The 0,1 μ m grade 10 cleanrooms used in China mainly rely on imports from abroad. Due to the high cost of clean room, the cost of 0.1 μ m grade 10 clean room is more than 10000 US dollars per square meter. In the investment of large-scale integrated circuit manufacturing equipment, clean workshop accounts for a high proportion, which is not suitable for the development trend of continuous updating of integrated circuit technology and product upgrading cycle, which seriously restricts the development of large-scale integrated circuit technology. In recent years, the equipment and technology of submicron production microenvironment system using isolation technology developed by ASysT company in the United States and MW company in Germany have been widely used. The latest clean technology in the 100 level clean workshop adopts the micro environment of partial use of isolation technology for process equipment, which reduces the investment proportion to the high level micro environment, and eliminates the impact of secondary pollution sources generated by the operation of operators and process equipment on the yield and reliability of integrated circuit.
The international market of clean technology and equipment is very huge. By the end of 1980s and the beginning of 1990s, the sales volume of clean technology and equipment in Japan had exceeded 3.5 billion US dollars. Sales of clean equipment and basic components in advanced countries such as the United States and Western Europe have reached $7.3 billion. According to the statistics of China Electronic Special Equipment Industry Association, the sales volume of the eight largest purification equipment factories in China was 82.17 million yuan in 1990, less than 100 million yuan, reaching 144.95 million yuan in 1993, accounting for 0.34% of the sales volume in the international market. However, with the rapid development of high and new technology and the development of microelectronics industry, optical fiber industry, liquid crystal display industry, optoelectronic device industry, bioengineering industry and pharmaceutical industry, China's potential huge clean technology product market is increasing at an annual growth rate of 40% - 50%.
Shandong ed purification Engineering Co., Ltd. has strong technical strength and construction experience. According to the different needs of clean places, professional equipment is used to form different levels of clean standard space and create the most suitable production and working environment. At present, it has established close cooperation with many enterprises and is a reliable professional purification project implementer. For more knowledge of medical purification industry, please pay attention to wechat public number: aide-188 (ED purification oxygen supply)