Patent ID: 7259965

Claim:
A system comprising: a microprocessor integrated circuit die, the microprocessor integrated circuit die including at least one hotspot at which circuit elements in the die cause a temperature increase in excess of an average temperature on the die; a microchannel structure thermally coupled to the microprocessor integrated circuit die, the microchannel structure having microchannels formed therein, said microchannels to transport a coolant and to be proximate to an integrated circuit to transfer heat from the integrated circuit to the coolant, at least one of said microchannels having a length extent and having a first section at a first location along said length extent and a second section at a second location along said length extent, said first section having a first aspect ratio and said second section divided into at least two sub-channels, each sub-channel having a respective second aspect ratio that is greater than said first aspect ratio, said second section located at said at least one hotspot, said first section not located at said at least one hotspot; and a chipset in communication with the microprocessor integrated circuit die.