1、Professional staffs: The members of Commercial FineWin are researchers and marketing managers who had worked in Crystal and Optical field for more than 15 years. 2、Complete product range: (1) Semiconductor materials: sapphire substrate, Silicon wafers, GaN template, Sic. (2) Optical windows: sapphire windows, silicon windows, and other optical material windows. (3) Piezoelectric, acousto-optic and laser crystal: LN, LT, TeO2, YAG. 3、Customized with drawings, samples, and applications. 4、More intergrated, more Guarantee: From crystal growth to Fabrication, which guarantee the quality and the cost of our products. 5、Stable and timely delivery: The large production capacity allows us to have odinary stocks of plain wafers and fast delivery.