Patent ID: 7842887
Filing Date: 2010-11-30
Classification: H01L,H05K,Y10T

Abstract:
1. A multilayer printed circuit board comprising: a substrate; a multilayered structure comprising a plurality of interlayer insulating layers and a plurality of conductive layers each having a plurality of conductor circuits and formed on an upper surface of the substrate, the plurality of interlayer insulating layers including a lowermost insulating layer, the plurality of conductive layers including a lowermost conductive layer formed on the lowermost insulating layer; an electronic component having a pad and formed in the substrate; a plurality of via holes formed in the interlayer insulating layers; and a mediate layer including a first thin film layer, a second thin film layer, and a thick film layer, formed directly under a via hole formed in the lowermost insulating layer and on the pad of the electronic component, and electrically connecting one of the conductor circuits of the lowermost conductive layer and the pad of the electronic component through a conductive film formed in the via hole formed in the lowermost insulating layer.