Patent ID: 8581388
Filing Date: 2013-11-12
Classification: H01L,H05K

Abstract:
1. A multilayered wiring substrate, comprising: a stack structure multilayered by alternately stacking a plurality of conductor layers and a plurality of resin insulation layers including an identical resin insulation material; a plurality of first-main-surface-side connecting terminals arranged in a first main surface of the stack structure; and a plurality of second-main-surface-side connecting terminals arranged in a second main surface of the stack structure; wherein the plurality of conductor layers are formed in the plurality of resin insulation layers and are operably connected to each other through via conductors tapered such that diameters thereof are widened toward the first main surface or the second main surface, wherein a plurality of openings are formed in an exposed outermost resin insulation layer in the second main surface of the stack structure, and terminal outer surfaces of the second-main-surface-side connecting terminals arranged to match with the plurality of the openings are positioned inwardly from an outer main surface of the exposed outermost resin insulation layer and edges of terminal inner surfaces are rounded.