Piezoelectric resonator and electronic component containing same

An electronic component comprising:

• a piezoelectric resonator which includes a base member, a plurality of internal electrodes disposed within said base member arranged to be substantially perpendicular to a longitudinal direction of said base member along a longitudinal axis of the base member, and a pair of external electrodes provided on one of a common lateral surface or different lateral surfaces of said base member so as to be connected to said plurality of internal electrodes, said base member having a laminated structure including a plurality of piezoelectric layers and said plurality of internal electrodes being alternately laminated;
• means for driving said base member by applying an electric field to said base member for vibrating said base member;
• said piezoelectric layers being polarized in the longitudinal direction of said base member and generating longitudinal vibration in said base member when said means for driving applies the electric field in the longitudinal direction of said base member such that a vibration node of the piezoelectric base member is defined approximately at a center portion of the base member, wherein dimensions of said piezoelectric resonator satisfy the conditions of L>2W and L>2T when a length, width and thickness of said piezoelectric resonator are indicated by L, W and T, respectively;
• a support substrate for supporting said piezoelectric resonator;
• a support member disposed between said piezoelectric resonator and said support substrate for supporting said piezoelectric resonator on said support substrate;
• and
• a cap disposed on said support substrate to cover said piezoelectric resonator.

A piezoelectric resonator comprising:

• a base member including a plurality of piezoelectric layers and a plurality of internal electrodes defining a single integral unit;
• means for driving said base member by applying an electric field to said base member for vibrating said base member;
• said piezoelectric layers being polarized and arranged to generate longitudinal vibration in said base member along a longitudinal axis of the base member and such that a vibration node of the piezoelectric base member is defined approximately at a center portion of the base member when said means for driving applies the electric field in the longitudinal direction of said base member;
• and
• a pair of external electrodes provided on said base member so as to be connected to said plurality of internal electrodes;
• wherein
• dimensions of said piezoelectric resonator satisfy the conditions of L>2W and L>2T when a length, width and thickness of said piezoelectric resonator are indicated by L, W and T, respectively.

An electronic component comprising:

• a piezoelectric resonator including a base member including a plurality of piezoelectric layers and a plurality of internal electrodes defining a single integral unit;
• means for driving said base member by applying an electric field to said base member for vibrating said base member;
• said piezoelectric layers being polarized and arranged to be generate longitudinal vibration in said base member along a longitudinal axis of the base member and such that a vibration node of the piezoelectric base member is defined approximately at a center portion of the base member when said means for driving applies the electric field of the longitudinal direction of said base member, a pair of external electrodes provided on said base member so as to be connected to said plurality of internal electrodes, wherein dimensions of said piezoelectric resonator satisfy the conditions of L>2W and L>2T when a length, width and thickness of said piezoelectric resonator are indicated by L, W and T, respectively;
• a support substrate for supporting said piezoelectric resonator;
• a support member disposed between said piezoelectric resonator and said support substrate for supporting said piezoelectric resonator on said support substrate;
• and
• a cap disposed on said support substrate to cover said piezoelectric resonator.