GRINM, established in 1952, is the largest R&D institution in the field of nonferrous metals industry in China. It was formally transformed into a large-scale high-tec enterprise on 2000.GRITEK, GRIKIN, GRINM electro-optic materials Co.,Ltd. & Compo Co., Ltd are the holding companies of GRINM. We export semiconductor material, high purity sputtering target and lead free solder powder ect. all over the world. GRINM and its product are well known and have high market share.