Patent ID: 9491867
Filing Date: 2016-11-08
CPC Classification: H03H,H05K

Claim Text:
1. A wiring substrate comprising: a substrate body made of insulating material and having a front surface and a rear surface, the front surface and the rear surface each having a rectangular shape in a plan view and the rear surface having edges; a plurality of rear surface electrodes formed on the rear surface of the substrate body, each of the plurality of rear surface electrodes positioned adjacent to a corresponding pair of edges of the rear surface that intersect with each other, and with a part of the rear surface exposed between the plurality of rear surface electrodes and each edge of the rear surface; a frame-shaped conductive portion provided on a front surface side of the substrate body and having a rectangular frame shape in a plan view; a via conductor penetrating the substrate body and establishing electric connection between the plurality of rear surface electrodes and the frame-shaped conductive portion, and at least one projecting wiring formed on the rear surface of the substrate body between each of the plurality of rear surface electrodes and each of the corresponding pair of edges adjacent to the rear surface electrode.