| 主权项 |
1. A piezoelectric device comprising:
an insulated container having a substrate portion and a frame portion, the frame portion being formed in an outer peripheral part of a main surface of the substrate portion that faces an external substrate; an electronic component housed in a recess surrounded by the frame portion and the main surface of the substrate portion that faces the external substrate; a piezoelectric element mounted on a main surface of the substrate portion opposite to the main surface mounted with the electronic component; and a lid for hermetic seal of the piezoelectric element, wherein the frame portion has an outer peripheral edge rectangular in plan view and an inner peripheral edge rectangular or square in plan view, and four corners on the inner peripheral edge of the frame portion have an arc shape or a chamfered shape in plan view, four external connection terminals to be solder-bonded to the external substrate each have a shape with a bent portion in plan view in which each of the external connection terminals is extending from each of the four corners on a bottom surface of the frame portion in a long-side direction and a short-side direction of the outer peripheral edge of the frame portion, and each of the external connection terminals is spaced from an opening end of the recess with an electrode-absent region interposed therebetween, and each of the four external connection terminals has a plurality of angular parts in plan view, and at least one of the plurality of angular parts is in proximity to the inner peripheral edge of the frame portion in the arc shape or the chamfered shape at each of the four corners thereof. |
