A semiconductor device package includes a carrier, a first conductive post and a first adhesive layer. The first conductive post is disposed on the carrier. The first conductive post includes a lower surface facing the carrier, an upper surface opposite to the lower surface and a lateral surface extended between the upper surface and the lower surface. The first adhesive layer surrounds a portion of the lateral surface of the first conductive post. The first adhesive layer comprises conductive particles and an adhesive. The first conductive post has a height measured from the upper surface to the lower surface and a width. The height is greater than the width.