Radial flow micro-channel heat sink with impingement cooling
First Claim
1. A heat sink assembly for removing heat from an electronic device, said assembly comprising:
- a base having a top surface,a lid having a bottom surface in spaced relationship with and parallel to said top surface of said base,said lid defining an inlet opening on an inlet axis,an outer wall extending vertically between said top surface of said base and said bottom surface of said lid and about said inlet axis,a plurality of fins extending upwardly from said top surface of said base and extending radially from an inner circle concentric with said inlet axis toward an outer periphery disposed about said inlet axis for directing the flow of cooling fluid radially from said inlet axis, andcharacterized by a confining plate having a center opening for receiving the flow of coolant fluid from said inlet opening in said lid and extending radially from said center opening above said fins and spaced below said bottom surface of said lid.
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Accused Products
Abstract
A heat sink removes heat from an electronic device and comprises a base, a lid. An inner ring of first fins extend radially outwardly first length from an inner circle and extend axially a first height from the top surface of the base, and an outer ring of second fins extend radially inwardly a second length from an outer periphery and extend axially a second height from the top surface of the base. A confining plate extends radially above the fins and is spaced below the bottom surface of the lid whereby coolant fluid flows from an inlet opening of the lid through the center opening of the confining plate and radially outwardly through the fins and upward around the outer edge of the confining plate and into the space above the confining plate to an outlet opening. A nozzle having a throat is disposed above the lid and extends below the lid to the confining plate. A flow diverter extends upwardly from the top surface of the base and into and through the throat of the nozzle.
31 Citations
25 Claims
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1. A heat sink assembly for removing heat from an electronic device, said assembly comprising:
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a base having a top surface, a lid having a bottom surface in spaced relationship with and parallel to said top surface of said base, said lid defining an inlet opening on an inlet axis, an outer wall extending vertically between said top surface of said base and said bottom surface of said lid and about said inlet axis, a plurality of fins extending upwardly from said top surface of said base and extending radially from an inner circle concentric with said inlet axis toward an outer periphery disposed about said inlet axis for directing the flow of cooling fluid radially from said inlet axis, and characterized by a confining plate having a center opening for receiving the flow of coolant fluid from said inlet opening in said lid and extending radially from said center opening above said fins and spaced below said bottom surface of said lid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A heat sink assembly for removing heat from an electronic device, said assembly comprising:
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a base having a top surface, a lid having a bottom surface in spaced relationship with and parallel to said top surface of said base, said lid defining an inlet opening on an inlet axis, an outer wall extending vertically between said top surface of said base and said bottom surface of said lid and about said inlet axis, a plurality of first fins extending radially first length from an inner circle a concentric with said inlet axis toward an outer periphery disposed about said inlet axis for directing the flow of cooling fluid radially from said inlet axis, said first fins extending axially a first height h1 from said top surface of said base, a plurality of second fins extending radially inwardly from said outer periphery a second length and extending axially a second height from said top surface of said base, one of said first fins being radially aligned with every other one of said second fins, said first height being less than said second height from said top surface of said base, a confining plate having a center opening for receiving the flow of coolant fluid from said inlet opening in said lid and extending radially from said center opening above said fins and spaced below said bottom surface of said lid to an outer edge spaced radially inwardly from said outer wall, a nozzle having entry portion converging to a throat and an exit portion diverging from said throat with said throat being disposed above said lid and said diverging exit portion extending through and in sealing engagement with said lid and into sealing engagement with said center opening of said confining plate, and said lid defines an outlet opening disposed above said confining plate whereby coolant fluid flows through said nozzle in said lid to said center opening of said confining plate and radially outwardly through said fins and upward around said outer edge of and above said confining plate to said outlet opening. - View Dependent Claims (24, 25)
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Specification