Patent ID: 8373071

Claim:
An embedded wiring board, comprising: an activating insulation layer having an upper surface and a lower surface opposite to the upper surface, comprising a plurality of catalyst particles substantially evenly distributed in a high molecular weight compound; a first wiring layer located on the lower surface of the activating insulating layer, comprising at least one first pad exposedly embedded in the lower surface; a second wiring layer located on the upper surface, comprising at least one second pad exposedly embedded in the upper surface; and a solid conductive pillar disposed in the activating insulation layer in contact with some of the catalyst particles, and connected between the first pad and the second pad, wherein an upper interface plane exists between the solid conductive pillar and the second pad, the upper interface plane separates the solid conductive pillar and the second pad, and a distance between the upper interface plane and the upper surface is not greater than a distance between the upper interface plane and the lower surface.