A semiconductor device package includes a carrier, a first insulation layer, a capacitor element, a plurality of interconnection structures, a plurality of substantially parallel top-side metal bars, and a plurality of substantially parallel bottom-side metal bars. The first insulation layer is on the carrier and has a first surface and a second surface adjacent to the carrier and opposite to the first surface, the first insulation layer defining a plurality of through holes. The capacitor element is in the first insulation layer, the capacitor element including a top electrode and a bottom electrode. The plurality of interconnection structures are within the through holes and formed as conductive through holes. The plurality of substantially parallel top-side metal bars are on the first surface of the first insulation layer. The plurality of substantially parallel bottom-side metal bars are on the second surface of the first insulation layer.