A semiconductor device package includes: (1) a carrier; (2) an electronic component disposed over a top surface of the carrier; (3) a package body disposed over the top surface of the carrier and covering the electronic component; and (4) a shield layer, including a first magnetically permeable layer disposed over the package body, a first electrically conductive layer disposed over the first magnetically permeable layer, and a second magnetically permeable layer disposed over the first electrically conductive layer. The first electrically conductive layer is interposed between the first magnetically permeable layer and the second magnetically permeable layer. A permeability of the first electrically conductive layer is different from a permeability of the first magnetically permeable layer and a permeability of the second magnetically permeable layer.