Patent ID: 7507914

Claim:
An apparatus for accommodating circuitry device and interconnect changes externally to a parent printed wiring assembly, the apparatus comprising: a micro-castellated printed wiring board, said micro-castellated printed wiring board comprising fine features, the printed wiring board comprising a material whose properties account for a coefficient of expansion differences between the changed circuitry devices and a parent printed wiring board from the parent printed wiring assembly; a first interconnection between said fine features and the changed circuitry devices, said first interconnect comprising: automated assembly and reflow; a robust solder joint, wherein the robust solder joint has a specific geometry based on a pad to a part lead geometry and thermal induced stresses; a unique pad geometry for said changed circuitry devices which defines a footprint; and a second interconnection between landed castellations of said micro-castellated printed wiring board and the parent printed wiring assembly, the second interconnection including a robust leadless solder joint having a specific geometry based on a pad to castellation geometry ratio and thermal stresses.