Patent ID: 6787918
Filing Date: 2004-09-07
Classification: H01L,H05K

Abstract:
A substrate structure of Flip Chip package comprising:a plurality of patterned circuit layers; at least an insulative layer stacked between the patterned circuit layers for isolating the patterned circuit layers, and the patterned circuit layers are electrically connected one another, and one of the patterned circuit layer is positioned on the surface of the substrate of the flip chip package as a top patterned circuit layer, and the top patterned circuit layer comprises at least a plurality of first mounting pads and a plurality of second mounting pads; and a solder mask layer covering the patterned circuit layer on the surface of the substrate of the flip chip package, the solder mask layer partially covering a first top surface of the first mounting pads while entirely exposing a second top surface and sidewalls of the second mounting pads, wherein the first mounting pads are disposed at a peripheral region of the substrate and the second mounting pads are disposed at a central region of the substrate, and wherein said first and second mounting pads are directly attached to corresponding bumps of a chip.