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Henan Zhonglan Environmental Protection Engineering Co., Ltd. specializes in: integrated water purification equipment, groundwater defluorination equipment, well water iron and manganese removal equipment, ultrapure water equipment, valveless filters, pure water equipment, water purification equipment, sewage treatment equipment, Reverse osmosis equipment; environmental protection engineering, construction mechanical and electrical installation engineering construction; sales of water treatment equipment accessories and consumables, laboratory instruments, teaching equipment, telephone 18838160815.
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  • Ultra-pure water equipment for cleaning products in the semiconductor industry

    Source: Author: Bluestar Environmental Time: 2015-09-17 Views: Times

    Semiconductor equipment 1.jpg

    Overview
    In terms of equipment design, a mature, reliable, advanced, highly automated two-stage RO + EDI + precision mixed bed demineralization process is adopted to ensure that the treated water effluent quality resistivity reaches 18.2 MΩ.cm. The key equipment and materials are all internationally advanced and reliable products. They are controlled by PLC + touch screen. The complete system has a high degree of automation and high system stability. Greatly save manpower cost and maintenance cost, high water utilization rate, reliable operation, economical and reasonable. Compared with other similar products, the equipment has higher cost performance and equipment reliability. Our company specializes in the production of RO + EDI + precision mixed bed ultrapure water equipment. It has many years of production experience, especially in the electrical control system PLC. The technology in the water treatment industry is relatively mature. We have also done many water treatment equipment in various industries. We have extensive experience. The quality of the equipment made by our company has advantages over them, and it has a certain market competitiveness in China. The product has many advantages such as good performance, lower price than similar foreign products, timely delivery and convenient and fast after-sales service. Desalinated water and ultrapure water devices in solar photovoltaic cells, LEDs, LCDs, kinescopes, liquid crystal displays, semiconductors, optoelectronics companies have been widely praised by the industry. Customers are welcome to visit and inspect. In the semiconductor industry, the inner wall of the phosphor screen is coated with a layer of fluorescent substance by spraying or precipitation. It is made of phosphor particles composed of zinc or other metal sulfides and bonded with potassium silicate. Its preparation requires ultrapure water, such as pure If copper contains more than 8ppb in water, it will cause luminescence and discoloration; if iron contains more than 50ppb, it will cause luminescence to change color, darken, and flash jump; if it contains organic colloids, particles, bacteria, etc., it will reduce the intensity of the fluorescent layer and its glass The adhesion of the shell will cause air bubbles, streaks, light leaks and other defective products. In the 12 processes of producing black and white picture tube fluorescent screens, pure water is used in the five processes of glass bulb cleaning, sedimentation, wetting, membrane washing, and neck cleaning. Each picture tube requires 80 kg of pure water [1]. The screen of the liquid crystal display needs to be cleaned with pure water and mixed with pure water. If there are impurities such as metal ions, microorganisms, and particles in the pure water, it will cause the liquid crystal display circuit to malfunction, affect the quality of the liquid crystal screen, and cause waste and secondary Product. The quality of pure water in the production of kinescopes and liquid crystal displays.

    Semiconductor equipment 2.jpg

    Water quality standards for ultrapure water for the semiconductor industry:
    The quality of the ultra-pure water used in the semiconductor industry of our company fully complies with the American ASTM pure water quality standards and the electronic-grade water quality technical standards of the Ministry of Electronics Industry of China (18MΩ.cm, 15MΩ.cm, 10MΩ.cm, 2MΩ.cm, 0.5MΩ.cm Level standards), the Ministry of Electronics Industry of China's high-purity water quality trial standards, the United States semiconductor industry pure water indicators, Japanese integrated circuit water quality standards, domestic and international large-scale integrated circuit water quality standards.
    Water quality requirements for ultra-pure water equipment for the semiconductor industry:
    Emerging optoelectronic materials production, processing, and cleaning; LCD liquid crystal displays, PDP plasma displays, high-quality tube picture tubes, microelectronics industry, FPC / PCB circuit boards, circuit boards, large-scale, ultra-large-scale integrated circuits require a large number of High-purity water, ultra-pure water for cleaning semi-finished products and finished products. The higher the degree of integration of integrated circuits, the higher the requirements for water quality. This also imposes more stringent requirements on the simplicity, degree of automation, production continuity, and sustainability of ultrapure water treatment processes and products.
    Application of ultra pure water equipment in semiconductor industry:
    ☆ Aluminum foil production of electrolytic capacitors and cleaning of work pieces ☆ Electron tube production, cathode coating of carbonated liquid for electron tubes ☆ Production of picture tubes and cathode ray tubes, pure water for ingredients ☆ Production of black and white picture tube fluorescent screens, glass bulb cleaning, precipitation, humidification, washing Pure water for cleaning membranes and necks Medium and high pure water for cleaning wafers ☆ Semiconductor materials, devices, printed circuit boards and integrated circuits ☆ LCD liquid crystal display, PDP plasma display ☆ High quality picture tube, phosphor production ☆ Semiconductor material, wafer material production, processing, cleaning Ultra-pure materials and ultra-purity reagents, ultra-purification materials ☆ Laboratory and pilot plant ☆ Surface polishing of automobiles and home appliances ☆ Photoelectric products, other high-tech products
    Process flow chart for the preparation of ultrapure water in the semiconductor industry:

    Semiconductor process flow.png

    Equipment advantages
    In order to meet the needs of users, meet the standards of water quality, reduce pollution at all levels as much as possible, prolong the service life of equipment, reduce the maintenance workload of operators. In process design, take water that meets national tap water standards as source water It is also equipped with media filter, activated carbon filter, sodium ion softener, precision filter and other pretreatment systems, RO reverse osmosis host system, ion exchange mixed bed (EDI electric desalination system) system, etc. The water tank in the system is equipped with a liquid level control system, the pumps are equipped with pressure protection devices, online water quality detection and control instruments, and the PLC is used as the electrical controller. The unified method makes the equipment more cost-effective and more reliable than other similar products.

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