Patent ID: 7999194
Filing Date: 2011-08-16
Classification: H01L,H05K,Y10T

Abstract:
1. A multi-layer printed circuit board comprising: a core substrate having a plurality of penetrating holes and having a first surface and a second surface; a plurality of buildup layers over the first and second surfaces of the core substrate, respectively, each of the buildup layers comprising a plurality of interlayer resin insulating layers and a plurality of conductor layers alternately provided, the plurality of interlayer resin insulating layers including a lower interlayer resin insulating layer formed adjacent to the core substrate and an upper interlayer resin insulating layer formed over the lower interlayer resin insulating layer; a plurality of through holes formed in the plurality of penetrating holes of the core substrate, respectively, and through the lower interlayer resin insulating layers and filled with a resin filler including inorganic particles; a plurality of first via holes filled with a resin filler including inorganic particles and formed in the lower interlayer resin insulating layers; and a plurality of second via holes formed in the upper interlayer resin insulating layers, wherein the inorganic particles are coated with a silica coupling agent, and the second via holes are formed right on the through holes, respectively.