The technique development of crystals and oscillators in China and their market situation

In recent years, the quantity and requirement for manufacturing crystals and oscillators in China has increased quickly. The paper introduces the manufacture, research and the characteristics of techniques developed regarding crystals and oscillators in the last 10 years in China. Along with the demands of industry, science and markets, the number of companies making and developing crystals and oscillators has increased from several to more than 300 in the last 20 years in China. Manufacturing technology and equipment also are improved a lot. Most of the precision crystals made in China are of glass packages. Now more and more companies plan to build production lines to make cold weld crystals and other precision crystals in China, and at least two companies have built a line. The main design techniques in China are based on experiments. However, in recent years, special design software has been used for oscillator design, and some advanced instruments and equipment are used. The market situation for crystals and oscillators is also introduced.