Flip chip package substrate

A flip chip package substrate for flip chip bonding to either a first chip or a second chip, wherein the first chip is provided with a first active surface and a plurality of first pads, and the first pads are disposed on the first active surface in an arrangement, and the second chip is provided with a second active surface and a plurality of second pads, and the second pads are corresponding to the arrangement of the first pads and disposed on the second active surface, the flip chip package substrate comprises:

• a plurality of patterned conductive layers, inter-stacked in sequence;
• at least an insulation layer, positioned between any two adjacent conductive layers for isolation the conductive layers and inter-stacked with the conductive layers;
• and
• a plurality of conductive vias, respectively passing through the insulation layer for electrically connecting the conductive layers,
• wherein the top layer of the conductive layers is provided with a plurality of bump pad groups and the bump pad groups are respectively provided with a first bump pad and a second bump pad, and the first bump pad and the second bump pad of the same bump pad group are electrically connected with each other, and the positions of the first bump pads are respectively corresponding to the positions of the first pads of the first chip and the positions of the second bumps are respectively corresponding to the positions of the second pads of the second chip.