To manufacture a semiconductor package, a package intermediate structure having an element area and a dummy area is formed. A carrier substrate including an adhesion layer is formed. The adhesion layer includes a first area with a first adhesion strength and a second area with a second adhesion strength that is different from the first adhesion strength. The package intermediate structure is supported by the carrier substrate so that the element area is adjacent the first area and the dummy area is adjacent the second area. The package intermediate structure is processed while the package intermediate structure is supported by the carrier substrate.