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US 2004/0000391 A1Published application
Composite heat sink with metal base and graphite fins
AssigneeGraftech Inc.
InventorsGeorge Getz JR., Michael Frastaci
Life of this patent
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Abstract
A composite heat sink apparatus includes a metal base which has a thermal conductivity of at least about 200 W/m° K. The metal base is preferably constructed either of copper of aluminum. The heat sink apparatus further includes a plurality of fins attached to the base, the fins being constructed of anisotropic graphite material having a direction of relatively high thermal conductivity perpendicular to the base.
Claims12
A heat sink apparatus, comprising:
- a metal base having a thermal conductivity of at least about 200 W/m° K.;
- and
- a plurality of fins attached to the base, the fins being constructed of anisotropic graphite material having a direction of relatively high thermal conductivity extending away from the base.
A heat sink apparatus, comprising:
- a copper base;
- and
- a plurality of graphite fins attached to the base, the graphite fins being planar and having a relatively high thermal conductivity within the plane of the fin and relatively low thermal conductivity across a thickness of each fin, so that the heat sink apparatus has a thermal performance approximately equal to that of an all copper heat sink while having a weight less than that of the all copper heat sink.
A heat sink apparatus, comprising:
- an aluminum base;
- and
- a plurality of graphite fins attached to the base, the graphite fins being formed of graphite sheet material extending from the base, the sheet material having axes of relatively high thermal conductivity greater than that of aluminum in the plane of the sheet and having a relatively low thermal conductivity across a thickness of the sheet material, the graphite sheet material having a specific gravity no greater than that of aluminum, so that the heat sink apparatus has a thermal performance greater than that of a similar sized all aluminum heat sink while having a weight no greater than that of the all aluminum heat sink.
Dependencies are inferred from the claim text.