Patent ID: 6879050

Claim:
A packaged microelectronic device, comprising: a redistribution member having an interposer substrate with a plurality of terminals, an array of ball-pads, and traces electrically coupling the terminals to the ball-pads; a microelectronic die including integrated circuitry, an active side adjacent to the interposer substrate and having a plurality of bond-pads electrically coupled to the terminals, and a backside, wherein the backside of the die includes a surface and a first non-planar feature relative to the surface; and a casing comprising a mold compound, the casing having an interior surface covering at least a portion of the backside of the die, wherein the interior surface of the casing includes a second non-planar feature engaged with the first non-planar feature of the die, wherein the first and second non-planar features have a height and/or a depth of greater than 25 μm to approximately 200 μm.