JJK -our company have begun to produce substrates of quartz crystal control since 2004 and supplied American market on a large scale from the second half of 2005, which makes our company the largest manufacturer of Quartz Crystal in China. More than 4 years gathering experience , at the beginning of 2008, our company introduced from America coating equipment to make finished goods of quartz crystal control and began to extend civil market comprehensively. In the year of 2010, our customers has reached to ***** manufacture equipment have brought into factory at the very beginning of 2011. We control every distinct production step in the manufacture of our Quartz Monitor Crystals, from the high quality raw material supply to the precision producing process requirement. We hold 5/6Mhz quartz crystal with three kinds of electrode material-gold , silver and alloy. Excellent for optical coating and metallization .Products applied to different vacuum coating machines from America, Japan, Germany. Well accepted by the customers from optical coating , LED field and other optic, medical educational instruments With the first ���¢�¯�¿�½�¯�¿�½class technology , first-class technology, relying on the first-class substrate, carefully makes domestic crystals slice the first brand.