Patent ID: 7446460

Claim:
A piezoelectric device comprising: a piezoelectric element; a circuit board on which the piezoelectric element is mounted; an IC component having at least a function of oscillating the piezoelectric element and connected to a bottom face of the circuit board; an insulating section covering at least a part of the IC component; a circuit connection terminal formed on a main surface of the IC component; an internal connection bump formed on the circuit connection terminal and connected to the circuit connection terminal and the bottom face of the circuit board; a functional terminal formed on a main surface of the IC component; a back surface electrode formed on a back surface of the IC component; a penetrating electrode penetrating the IC component from the main surface to the back surface and connecting the functional electrode and the back surface electrode to each other; an external connection bump connected to the back surface electrode; and a mounting terminal formed on a surface of the insulating section, wherein a part of the external connection bump is exposed from the surface of the insulating section and is connected to the mounting terminal.