Patent ID: 8158891
Filing Date: 2012-04-17
Classification: H05K,Y10T

Abstract:
1. A multilayer packaging substrate structure comprising: a core board having a first circuit layer on opposite surfaces thereof, wherein the first circuit layer has a plurality of conductive pads; and a built-up structure covering each of the opposite surfaces of the core board, and comprising at least one dielectric layer, a second circuit layer with sides-and-bottom-embedded in and top-exposed from the at least one dielectric layer, and a plurality of conductive vias disposed in the at least one dielectric layer without being surrounded by annular metal rings and conducting the conductive pads and the second circuit layer, and the surfaces of the second circuit layer, the conductive vias, and the dielectric layer are on the same plane, wherein the multilayer packaging substrate structure has a chip-disposed side used for connecting to a semiconductor chip and a ball-disposed side used for connecting to a printed circuit board.