Patent ID: 7973245
Filing Date: 2011-07-05
Classification: H01G,H01L,H05K

Abstract:
1. A wiring board, comprising: a wiring board main body including a capacitor housing portion; a capacitor housed in the capacitor housing portion and comprising at least part of a sub-core portion, said capacitor comprising a first electrode conductor layer; a second electrode conductor layer opposed to the first electrode conductor layer; and a dielectric layer disposed between the first electrode conductor layer and the second electrode conductor layer, said capacitor including, at an outer peripheral edge, at least one of (i) a chamfered portion with a chamfering dimension of not less than 0.6 mm and (ii) a radius portion having a radius of curvature of not less than 0.6 mm; wherein the dielectric layer has a linear coefficient of expansion smaller than the linear coefficient of expansion of the wiring board, and larger than the linear coefficient of expansion of a semiconductor board of a semiconductor chip to be mounted on the wiring board; and wherein said capacitor has a dimension larger than that of the chamfered portion, and said first electrode layer and second electrode layer are exposed on an outer peripheral surface of the capacitor.