Piezoelectric resonator and electronic component using the same

摘要

A piezoelectric resonator has a base member formed by laminating piezoelectric layers and electrodes. The base member is polarized in different directions at both sides of an electrode. Electrodes are alternately covered by insulating film 16 and insulating film 18, respectively, on opposing side faces of the base member. The insulating film 16 covers electrodes which are not covered by the insulating film 18, and vice versa. External electrodes 20 and 22 are formed on the opposing side faces of the base member and the electrodes are connected to them, respectively. At both ends of the base member, inactive sections are formed such that an electric field is not applied to the base member by covering consecutive plural electrodes with the insulating film 16 and 18. The center of the base member serves as an active section since an electric field is applied.