Patent ID: 8933342
Filing Date: 2015-01-13
Classification: H05K

Abstract:
1. A wiring substrate comprising: a substrate main body having a first main face and a second main face opposite the first main face; a resistor formed on the first main face; a plurality of first-main-face-side wiring layers which are each formed on the resistor and which each include a grounding metal layer formed of a metal having a resistance lower than that of the resistor and a conductor layer formed on the grounding metal layer, the plurality of first-main-face-side wiring layers each having an upper surface and side surfaces; a second-main-face-side wiring layer formed on the second main face; and a via which is formed in the substrate main body and which establishes electrical connectivity between the plurality of first-main-face-side wiring layers and the second-main-face-side wiring layer, the wiring substrate including a conductive covering layer which covers the upper surface and substantially covers the side surfaces of each of the plurality of first-main-face-side wiring layers wherein the conductive covering layer covers the side surfaces of each of the plurality of first-main-face-side wiring layers on a side, except where the grounding metal layers of each of the plurality of first-main-face-side wiring layers face each other.