Carbonaceous composite heat spreader and associated methods
OwnerChien-Min Sunginventor
Life of this patent
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Abstract
A heat spreader including a plurality of carbonaceous particles present in an amount of at least about 50% by volume of the heat spreader. A non-carbonaceous infiltrant is also present in an amount of at least about 5% by volume of the heat spreader, the non-carbonaceous infiltrant including an element selected from the group consisting of Cu, Al and Ag. In another aspect, the carbonaceous particles may be sintered or fused directly to one another. The heat spreader can be incorporated into a cooling unit for transferring heat away from a heat source, which includes a heat sink with the heat spreader disposed in thermal communication with both the heat sink and the heat source.
Claims19
A heat spreader comprising:
- a plurality of carbonaceous particles present in an amount of at least about 50% by volume of the heat spreader;
- and
- a non-carbonaceous material present in an amount of at least about 5% by volume of the heat spreader, said non-carbonaceous material including an element selected from the group consisting of Cu, Al and Ag;
- the non-carbonaceous material including a carbide forming element in an amount from about 1% w/w to about 10% w/w of the non-carbonaceous material, said carbide forming element including a Cu—Mn alloy.
A cooling unit for transferring heat away from a heat source, comprising:
- a heat sink;
- and
- a heat spreader comprising:
- a plurality of carbonaceous particles present in an amount of at least about 50% by volume of the heat spreader;
- and
- a non-carbonaceous material present in an amount of at least about 5% by volume of the heat spreader, said non-carbonaceous material including an element selected from the group consisting of Cu, Al and Ag;
- the heat spreader being disposed in thermal communication with both the heat sink and the heat source, the heat spreader being at least partially embedded in the heat source.
Dependencies are inferred from the claim text.