Patent ID: 7737562

Claim:
A semiconductor element mount, comprising: a planar ceramic insulative member having opposite surfaces which respectively serve as a main surface for mounting a semiconductor element and an external connection surface for connection to a second component, and a through-hole extending thicknesswise thereof and having a single minimum size hole portion located at a position defined with respect to a thickness thereof, the through-hole having an interior surface tapered such that an opening size thereof progressively decreases from openings of the through-hole in the main surface and the external connection surface toward the minimum size hole portion; an electrode layer provided on the main surface of the insulative member for mounting the semiconductor element; a pair of electrode layers provided on the external connection surface for connection to the second component; and an electrically conductive layer provided on the interior surface of the through-hole for connection between the electrode layer on the main surface and the electrode layers on the external connection surface, the through-hole being closed by the insulative member itself on a main surface side end of a side face thereof.