A package substrate including an insulating layer having a top surface and a bottom surface opposite to the top surface, at least one first copper pattern disposed in the insulating layer and adjacent to the top surface of the insulating layer, at least one second copper pattern disposed on the bottom surface of the insulating layer, and at least one embedded aluminum pad disposed on the at least one first copper pattern, the at least one embedded aluminum pad disposed in the insulating layer such that a top surface of the at least one embedded aluminum pad is exposed by the insulating layer may be provided.