Patent ID: 7626317

Claim:
A piezoelectric oscillation element comprising: a piezoelectric substrate; a first conductor film formed on one main surface of the piezoelectric substrate; a second conductor film formed on the other main surface of the piezoelectric substrate; ground terminals formed on both side surfaces of the piezoelectric substrate; and first and second input/output terminals formed on side surfaces of the piezoelectric substrate at positions where the ground terminals are arranged between the first and second input/output terminals, wherein the first conductor film has a first connection electrode to be connected to the first input/output terminal, a first vibration electrode leading to the first connection electrode, and a first capacitance electrode extended from the first connection electrode or the first vibration electrode toward one of the ground terminals wherein the second conductor film has a second connection electrode to be connected to the second input/output terminal, a second vibration electrode leading to the second connection electrode, and a second capacitance electrode extended from the second connection electrode or the second vibration electrode toward the other ground electrode, predetermined capacitances are formed between the first and second capacitance electrodes and the ground terminals, respectively, and the first and second vibration electrodes face each other by sandwiching the piezoelectric substrate therebetween.