Patent ID: 7893600

Claim:
A piezoelectric resonator comprising: a piezoelectric substrate having first and second principal surfaces; a first vibrating electrode formed on a first principal surface of the piezoelectric substrate; a second vibrating electrode formed on a second principal surface of the piezoelectric substrate; a first sealing substrate joined to the piezoelectric substrate via a first frame so as to form a first vibration space on a first principal surface side of the piezoelectric substrate; a second sealing substrate joined to the piezoelectric substrate via a second frame so as to form a second vibration space on a second principal surface side of the piezoelectric substrate, and a resin layer is interposed between the first sealing substrate and the first frame, wherein the first sealing substrate is made of a ceramic material, and the second sealing substrate is made of a resin material, and the resin layer is made of the resin material forming the second sealing substrate, and the thickness of the second sealing substrate and a thickness of the resin layer are substantially equal to each other.