Method for forming a composite material, and heat sink

Patent metadata

Field	Value
Publication number	US-9995541-B2
Application number	US-201214233488-A
Country	US
Kind code	B2
Filing date	Jul 11, 2012
Priority date	Jul 20, 2011
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

A method for forming a carbon-metal composite material for a heat sink, comprising the following steps: applying at least one layer comprising carbon particles and at least one layer comprising metal particles on top of one another; and fusing of the layers by irradiating the layers with laser radiation to form the carbon-metal composite material. The invention also relates to a heat sink having a shaped body that comprises a plurality of layers, each layer containing carbon particles in a metal matrix.

First claim

What is claimed is:

1. A method of making a heat sink comprising a composite material, the method comprising:
applying at least one layer comprising carbon particles and at least one layer comprising metal particles on top of one another;
fusing of the layers by irridating the layers with laser radiation to form a carbon-metal composite material; and
forming a shaped body from the carbon-metal composite material by repeating the applying and the fusing of layers multiple times;
wherein, in order to form a final layer for the shaped body, only metal particles are applied.

2. Method according to claim 1 , in which at least two of the layers have carbon particles with different granulation.

3. Method according to claim 1 , in which at least two layers of the carbon-metal composite material are produced having different volume ratio of carbon particles to a metal matrix formed from metal particles.

4. Method according to claim 1 , in which the metal particles are selected from the group comprising: copper, silver, gold, aluminum, tin and titanium.

5. Method according to claim 1 , in which the carbon particles are selected from the group comprising: diamond, graphite and carbide.

6. Method of claim 1 , further comprising the following steps:
applying at least one layer of metal particles to a substrate; and
fusing of the layer to the substrate through laser radiation.

7. Method according to claim 1 , in which at least one layer comprising carbon particles is applied with a density varying in a thickness direction.

8. The method of claim 1 , further comprising directly connecting a component to the final layer by bonding the component to the final layer.

Assignees

• Wallmeroth Klaus
• Schmitz Christian
• Trumpf Laser Gmbh

Inventors

• Wallmeroth Klaus
• Schmitz Christian

Classifications

• H01S5/02484

  Sapphire or diamond heat spreaders · CPC title

• F28F21/08

  of metal · CPC title

• F28F21/02 Primary

  of carbon, e.g. graphite · CPC title

• B22F7/02

  of composite layers {(B22F7/002 takes precedence)} · CPC title

• H10W40/257

  having a heterogeneous or anisotropic structure, e.g. powder or fibres in a matrix, wire mesh or porous structures (H10W40/254, H10W40/251 take precedence) · CPC title