Patent ID: 8836138

Claim:
A wiring substrate comprising: a substrate body made of an inorganic material; a first electrode portion, having a flat-plate shape that extends along a first direction parallel to one side of the substrate body in a plan view, the first electrode portion penetrating through the substrate body in a thickness direction of the substrate body; a second electrode portion having a flat-plate shape that extends along the first direction in the plan view, the second electrode portion penetrating through the substrate body in the thickness direction and facing the first electrode portion at a prescribed interval; a first signal electrode, which is provided between the first electrode portion and the second electrode portion and penetrates through the substrate body in the thickness direction; a third electrode, having a flat-plate shape, which is provided so as to completely surround the first electrode portion and the second electrode portion in the plan view and penetrates through the substrate body in the thickness direction; and a fourth electrode, having a flat-plate shape, which is provided so as to completely surround the third electrode in the plan view and penetrates through the substrate body in the thickness direction, wherein one of the first electrode portion and the second electrode portion is a ground electrode and the other is a power electrode.