MERCURY Electronic Ind Co., Ltd. has a 40-year history and is the first manufacturer in Taiwan to manufacture quartz crystals. However, the quartz crystal products used in the electronics industry have undergone great evolution, and the size has been miniaturized. The package has also changed from lead type to surface mount type, and the frequency range has been expanded to several KHz to several hundred MHz, and the precision is also calculated in parts per million. Its function is also extended to electronic communication intelligence and aerospace technology.