Patent ID: 6268684
Filing Date: 2001-07-31
Classification: H03H

Abstract:
A piezoelectric resonator, comprising:a piezoelectric substrate having a pair of major surfaces and being polarized in a thickness direction;a pair of electrodes respectively disposed on the pair of major surfaces of the piezoelectric substrate; whereinone of the pair of electrodes is divided into two separate electrode portions via a dividing line which extends along a longitudinal direction of the piezoelectric substrate, and the piezoelectric substrate is polarized such that two portions of the piezoelectric substrate sandwiching the dividing line are polarized in opposite directions, a first of the two separate electrode portions divided via the dividing line defines an input electrode and a second of the two separate electrode portions divided via the dividing line defines an output electrode;a relationship 1.0<B/A<1.5 is satisfied where A is the area of one of the input electrode and the output electrode and B is the area of the other of the input electrode and the output electrode.