A semiconductor package includes a package substrate. A first semiconductor chip is mounted on the package substrate. The first semiconductor chip includes a first chip region and first chip pads formed on a top surface of the first chip region. A second semiconductor chip is mounted on the package substrate. The second semiconductor chip includes a second chip region and second chip pads formed on a top surface of the second chip region. A boundary region having a groove divides the first chip region and the second chip region. The first chip region, the second chip region and the boundary region share a semiconductor substrate of a one-body type.