INTEGRATED STRUCTURE OF CRYSTAL RESONATOR AND CONTROL CIRCUIT AND INTEGRATION METHOD THEREFOR

An integrated structure of crystal resonator and control circuit and an integration method therefor. The crystal resonator is formed by first forming the lower cavity (120) in the device wafer (100) containing the control circuit (110), forming the piezoelectric vibrator (200) on the device wafer (100) and then enclosing the piezoelectric vibrator (200) within the upper cavity (400) through forming the cap layer (420) using a planar fabrication process. In addition, a semiconductor die (500) is bonded to the same device wafer (100), helping in enhancing device performance by allowing on-chip modulation of the crystal resonator's parameters. In this way, in addition to being able to integrate with other semiconductor components more easily with a higher degree of integration, the crystal resonator is more compact in size and less power-consuming.