Patent ID: 6487088
Filing Date: 2002-11-26
Classification: H01L,H05K

Abstract:
A package board comprising:a core board having a first surface and a second surface opposite the first surface, with first and second conductor layers formed on each of the first and second surfaces, respectively; a third conductor layer formed on at least one of said first and second conductor layers with a first interlaminar resin insulating layer therebetween; at least one of the first, second, and third conductor layers functioning as an electrode layer; and at least one of a pair consisting of the first and third conductor layers and a pair consisting of the second and third conductor layers, along with the interlaminar resin insulating layer between the at least one of the pairs, having a plurality of through-holes extending therethrough; wherein a land of each of the plurality of through-holes is formed as a portion of the electrode layer and is united with a pad connected to a via-hole formed through a second interlaminar resin insulating layer formed on an opposite side of said package board; and wherein the land and pad are united as a union of circular areas.