Abstract: A method of forming a package includes forming a circuit pattern on a first carrier and embedding the circuit pattern in a dielectric material on a second carrier. The first carrier is removed and a buildup dielectric material is mounted to the dielectric material and the circuit pattern. Laser-ablated artifacts are formed in the buildup dielectric material and filled with an electrically conductive material to form a buildup circuit pattern. The second carrier is patterned into a stiffener, which provides rigidity to the thin package.

Abstract: A method includes forming a substrate layer, the substrate layer including a circuit pattern having terminals and bump pads. A stiffener is formed, the stiffener including via apertures having electrically conductive via aperture sidewalls and an electronic component opening. The stiffener is attached to the substrate layer. The electrically conductive via aperture sidewalls are electrically connected to the terminals. An electronic component is mounted to the bump pads and within the electronic component opening thus minimizing the height of the package. Further, the stiffener minimizing undesirable bending of the package and acts as an internal heat sink.