| 摘要 |
PROBLEM TO BE SOLVED: To provide a piezoelectric element capable of improving the resonance frequency shift of a piezoelectric element which may be generated due to the deterioration of conductivity between an electrode on the inside bottom of a package and an extraction electrode of a piezoelectric vibration piece. SOLUTION: An epoxy group conductive adhesive 70 applied between the electrode 13 and the extraction electrode 31 is tightly stuck to the electrode 13 and the extraction electrode 31 independently of metal element species composing the electrode 13 and the extraction electrode 31 and is excellent in physical and chemical stability, so that conductivity between the electrode 13 and the extraction electrode 31 can be sufficiently secured and maintained. In addition, a silicon group adhesive 75 applied to a space between the electrode 13 and the extraction electrode 31, to which the epoxy group conductive adhesive 70 is not applied, is non-conductive, and thereby is not responsible for conductivity deterioration between the electrode 13 and the extraction electrode 31. Consequently, the resonance frequency shift of the piezoelectric element 1 which may be generated due to the conductivity deterioration can be improved. COPYRIGHT: (C)2009,JPO&INPIT |
