Abstract:
Packages and methods of formation are described. In an embodiment, a system in package (SiP) includes first (130) and second (180) redistribution layers (RDLs), and a plurality of die (110,150) attached to the front and back side of the first RDL. The first and second RDLs are coupled together with a plurality of conductive pillars (140) extending from the back side of the first RDL to a front side of the second RDL.