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CAS 19756-04-8 Tetrakis(dimethylamido)zirconium(IV) - Semiconductor / Alfa Chemistry Alfa Chemistry provides a wide range of products and services used throughout the semiconductor manufacturing process, such as CVD and ALD precursors, OLED and PLED materials, as well as high-quality silicon wafers. After years of development, we have gradually become a leader in the semiconductor field, providing product and service support to customers in many countries/regions.