Patent ID: 8746308

Claim:
A manufacturing method of a package carrier, comprising: providing a substrate, comprising: providing a insulating layer and a first and a second metal layers respectively located at two opposite sides of the insulating layer; and performing a thermal compression process, such that the first metal layer, the insulating layer, and the second metal layer are integrated to form the substrate, wherein a thickness of the second metal layer is greater than a thickness of the first metal layer, and the second metal layer has a top surface and a bottom surface opposite to the top surface; forming a first opening passing through the first metal layer and the insulating layer, the first opening exposing a portion of the top surface of the second metal layer; patterning the first metal layer to form a patterned conductive layer; forming a plurality of second openings on the bottom surface of the second metal layer, wherein the second metal layer is divided into a plurality of thermal conductive blocks by the second openings, and the second openings do not communicate with the first opening; and forming a surface passivation layer entirely covering the patterned conductive layer and the portion of the top surface of the second metal layer exposed by the first opening.