Patent ID: 7679916

Claim:
A system for extracting heat from an electronic device, said system comprising: an in-board heat sink structure positioned within a printed circuit board, said in-board heat sink structure comprising a microfluidic nano-tube system comprising a plurality of microfluidic nano-tubes; a ball grid array package attached to said printed circuit board, said ball grid array package comprising a plurality of solder balls attached to corresponding contact pads, said contact pads attached to corresponding vias that extend from the corresponding solder balls through a dielectric plane in the printed circuit board to a copper plane, at least one microfluidic nano-tube of the plurality of microfluidic nano-tubes embedded within the dielectric plane between adjacent vias; and a fluid heat transfer medium channeled through said in-board heat sink structure, wherein said fluid heat transfer medium flows into said in-board heat sink structure at a single entrance and circulates through said in-board heat sink structure carrying heat away from the electronic device.