Piezoelectric resonator and electronic component containing same

摘要

A piezoelectric resonator has a base member including a plurality of piezoelectric layers laminated with electrodes disposed therebetween. A first vibrating section is formed so as to occupy most of the base member. In the first vibrating section, adjacent piezoelectric layers sandwiching one electrode therebetween are polarized in opposite directions in the longitudinal direction of the base member. At both sides of the first vibrating section, second vibrating sections are formed. A piezoelectric layer of each of the second vibrating sections is polarized in the same direction as an adjacent piezoelectric layer in the first vibrating section with an electrode disposed therebetween. An electric field is applied in opposite directions to adjacent piezoelectric layers disposed on both sides of an electrode in the base member.