A substrate for a semiconductor package and a method for manufacturing a semiconductor package are disclosed. The substrate comprises a surface, and package unit regions arranged on the surface in a row direction to form a plurality of rows. The package unit regions of an n+1-th row are arranged offset in a row direction from the package unit regions of an n-th row. The method includes molding semiconductor chips and spaces between the substrate and the semiconductor chips on the package unit regions of the last row at substantially the same time.