Patent ID: 6407485
Filing Date: 2002-06-18
Classification: H03H

Abstract:
A piezoelectric vibrator comprising:a piezoelectric vibration plate having first and second opposed main surfaces, a first end having a first side surface, a second end having a second side surface and disposed opposite the first end in a lengthwise direction of the piezoelectric vibration plate, a piezoelectric vibration piece having a base portion, and a frame portion connected with the base portion and surrounding the piezoelectric vibration piece; first and second oscillation electrode films disposed on the opposed main surfaces of the piezoelectric vibration plate for undergoing oscillating movement to vibrate the piezoelectric vibration plate, the first oscillation electrode film being disposed on the first main surface of piezoelectric vibration plate and extending in the lengthwise direction toward the first end of the piezoelectric vibration plate, the first oscillation electrode film having a bonding film portion disposed on the first main surface and extending around the first end to the second main surface of the piezoelectric vibration plate, and the second oscillation electrode film being disposed on the second main surface of the piezoelectric vibration plate and extending in the lengthwise direction toward the second end of the piezoelectric vibration plate, the second oscillation electrode film having a bonding film portion extending around the second end and disposed on the first main surface of the piezoelectric vibration plate; a pair of cover members anodically bonded together through the bonding film portions of the first and second oscillation electrode films and forming a hermetically sealed cavity containing the piezoelectric vibration piece of the piezoelectric vibration plate in a state in which the piezoelectric vibration piece is capable of undergoing oscillating movement; and a pair of lead electrodes disposed on one of the cover members and each having an electrode portion connected to a respective one of the first and second ends of the piezoelectric vibration plate.