Patent ID: 6297581
Filing Date: 2001-10-02
Classification: H03H

Abstract:
A piezoelectric element, comprising:a piezoelectric substrate vibrating in a longitudinal vibration mode and having a nodal portion at which substantially no vibration occurs located at an approximate center along the length of the piezoelectric substrate;a pair of external electrodes respectively provided on front and back major surfaces of the piezoelectric substrate; anda conductive support section made of a material having a Young's modulus of at least about 10.sup.9 N/m.sup.2, disposed on one of said external electrodes and located at said nodal portion of said piezoelectric substrate at said approximate center along the length of the piezoelectric substrate; whereinsaid piezoelectric element satisfies the following condition:T1/T<0.5where T represents a thickness of said piezoelectric element and T1 represents a thickness of said support section.