Piezoelectric resonator and electronic component containing same

Details Piezoelectric resonator and electronic component containing same Piezoelectric resonator and electronic component containing same

1997-04-30

1999-04-06

Pascal, Robert

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333189, 310311, 310348, 310357, 310366, H03H 917, H03H 9205, H03H 910

Patent

active

058924167

ABSTRACT:
A piezoelectric resonator has a substantially rectangular-parallelpiped-shaped base member including a plurality of laminated piezoelectric layers. The piezoelectric layers have different dimensions in the longitudinal direction of the base member. The piezoelectric layers are polarized in the longitudinal direction of the base member such that the direction of polarization differs at every other piezoelectric layer. At both surfaces of the piezoelectric layers, a plurality of internal electrodes are disposed. The internal electrodes are alternately covered by at least two insulating films disposed on opposing side surfaces of the base member such that the at least two insulating films cover different electrodes. External electrodes are provided on the opposing side surfaces of the base member and the external electrodes are connected to internal electrodes.

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