Patent ID: 7521807
Filing Date: 2009-04-21
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor substrate having a center of volume, a central axis passing through the center of volume, a first surface extending substantially orthogonal to the central axis, electronic circuitry formed on the first surface, a second surface extending substantially orthogonal to the central axis, an edge extending substantially parallel to the central axis from the first surface to the second surface, and a peripheral part inwardly adjacent to the edge, wherein: the peripheral part has a through hole extending from the first surface to the second surface, the through hole providing an electrical connection between the first and second surfaces, the through hole originating at a first opening on the first surface and terminating at a second opening on the second surface, a distance of the second opening from the edge being larger than a distance of the first opening from the edge, a geometric projection formed by projecting the first opening onto the second surface parallel to the central axis being disposed partly inside and partly outside the second opening, the second opening being partly inside and partly outside the geometric projection.