TWM461298U - Flexible metal heat sink - Google Patents

Description

Flexible metal heat sink

The present invention relates to a flexible metal heat sink, in particular to a heat-sensitive metal layer having a flexible surface coated with a heat-dissipating coating and cured as a heat-dissipating coating, thereby being composited into a flexible metal having a thin shape and good heat dissipation. The designer of the film.

According to the development trend of high-power electronic products towards light, short, and versatile, the heat generated per unit area will become more and more. If these heat sources cannot be removed quickly, it will directly lead to the problem of excessive temperature. Seriously affect the normal use of the product, so the heat dissipation design is an extremely important issue for high-power electronic products. However, the typical heat sink shown in FIG. 1 is such that the heat source H is in contact with the heat sink 10 to dissipate heat through heat conduction. The heat sink 10 can have a large heat sink base 11 and a large number of heat sink fins 12 to increase The overall heat dissipation area is naturally convectively cooled with the air, or forced convection cooling by the fan 13; however, the heat sink is difficult to be thin and heavy, and cannot meet the development trend of high-power electronic products.

The main purpose of this creation is to provide a flexible metal heat sink with thinness and good heat dissipation.

Another purpose of this creation is to have a good anti-pollution effect.

In order to achieve the above effects, the structural features of the present invention include: a thermally conductive metal layer; and a heat-dissipating coating coating and curing the heat-dissipating paint mixed with a fluorocarbon resin as a base material and a filler having a pore structure. The surface of the thermally conductive metal layer.

In addition, the heat-dissipating coating filler is selected from the group consisting of nano bamboo charcoal, carbon nanotubes, nano zinc oxide, nano-cerium oxide or a combination of the foregoing fillers; the filler forms a convex structure on the surface of the heat-dissipating coating; The layer has a binder to filler weight ratio of 1 to 5 times.

Furthermore, the thermally conductive metal layer is a flexible copper foil layer, a flexible aluminum foil layer or a flexible copper foil and aluminum foil composite layer; further, a thermally conductive adhesive layer is glued to the other surface of the heat conductive metal layer relative to the heat dissipation coating; The surface of the thermal conductive adhesive layer is provided with a release paper; the thermal conductive adhesive layer uses a pressure sensitive adhesive; the thickness of the heat conductive metal layer is 0.009 to 0.3 mm, the thickness of the heat dissipation coating is 0.018 to 0.05 mm, and the thickness of the thermal conductive adhesive layer is 0.01~ 0.3mm.

H‧‧‧heat source

10‧‧‧ radiator

11‧‧‧Solution base

12‧‧‧ Heat sink fins

13‧‧‧Fan

20, 20a‧‧‧thermal metal layer

30‧‧‧ Thermal coating

31‧‧‧Base

32‧‧‧Filling

40‧‧‧thermal adhesive layer

41‧‧‧ release paper

50‧‧‧Flexible metal heat sink

H‧‧‧heat source

[Fig. 1] is a schematic structural view of a typical heat sink.

[Fig. 2] is a schematic view of the structure of the flexible winding of the present invention.

[Fig. 3] is a schematic view showing the structure of the first embodiment of the present creation (an enlarged view of the circled portion 3 in Fig. 2).

[Fig. 4] is a schematic structural view of a second embodiment of the present creation.

[Fig. 5] is a schematic diagram of the heat dissipation of the present creation.

First, referring to FIG. 2 and FIG. 3, the first embodiment of the flexible metal heat sink 50 of the present invention comprises: a thermally conductive metal layer 20, which may be a flexible copper foil layer or a flexible aluminum foil. a layer of heat conductive metal layer 20 having a thickness of 0.009 to 0.3 mm; a heat dissipating coating layer 30 coated and cured with a heat dissipating paint mixed with a fluorocarbon resin based material 31 and a filler 32 having a pore structure On the surface of the layer 20, the filler 32 forms a convex structure on the surface of the heat dissipation coating 30, and the weight ratio of the base material 31 to the filler 32 is 1 to 5 times, and the filler 32 is selected from the group consisting of nano bamboo charcoal, The carbon nanotube, the nano zinc oxide, the nano cerium oxide or a combination of the foregoing fillers, the heat dissipation coating 30 may have a thickness of 0.018 to 0.05 mm; and a thermal conductive adhesive layer 40 glued to the thermally conductive metal layer 20 relative to the The other surface of the heat dissipation coating layer 30 may have a thickness of 0.01 to 0.3 mm, and a release paper 41 is disposed on the surface of the thermal conductive adhesive layer 40, and the thermal conductive adhesive layer 40 is a pressure sensitive adhesive.

Next, referring to FIG. 4, the second embodiment of the present invention is different from the first embodiment in that the thermally conductive metal layer 20a is a flexible copper foil and a flexible aluminum foil composite layer.

Based on the constitution, the present invention applies a heat-dissipating coating on the surface of the flexible thermally conductive metal layer 20 or 20a and cures it into a heat-dissipating coating 30, thereby compounding into a flexible metal heat sink having a thin shape and good heat dissipation. The flexible coil can be conveniently used; among them, since the heat-dissipating coating 30 uses a fluorocarbon resin as the base material 31, since the fluorine element introduced by the fluorocarbon resin has a large electronegativity and a strong fluorocarbon bond, it is superior. Weather resistance, heat resistance, low temperature resistance and chemical resistance, and has a unique self-cleaning property, which in turn produces anti-pollution and environmental protection; in addition, the heat-dissipating coating 30 is selected from the group consisting of nano bamboo charcoal, carbon nanotubes, and nai a combination of rice zinc oxide, nano-cerium oxide or the aforementioned fillers as filler 32, and since these fillers 32 have The highly developed pore structure results in a large surface area and a convex structure on the surface of the heat-dissipating coating 30, which not only increases the diffusion surface area but also accelerates the heat dissipation rate; therefore, the creation has a thin shape and heat dissipation and pollution resistance. Good effect.

Please refer to FIG. 5 , which shows a heat dissipation diagram of the present invention. When the flexible metal heat sink 50 of the present invention is used, the release paper 41 is torn off, and the thermal adhesive layer 40 is attached to the heat source (H). The surface, while the thermal conductive adhesive layer 40 and the thermal conductive gold layer 20 (2a) above thereof are high thermal conductivity materials (thermal conductivity of copper is 401 w/mk, thermal conductivity of aluminum is 237 w/mk), so that the heat source (H) ) Transmitting in the transverse direction has a "thermal conduction" effect, but only the lateral thermal conduction effect is still insufficient to achieve the heat dissipation requirement for the high heat flux heat-generating component. At this time, the heat-dissipating coating 30 on the surface is utilized. The superior characteristics make it have an excellent axial "heat dissipation" function, which makes the "thermal conduction" and "heat dissipation" structures integrated into one body, and has the effect of complementary multiplication, so that the flexible metal heat sink 50 of the present invention can The very thin structure (below 0.6mm) becomes a flexible planar body, and the thin heat dissipation structure can also have good heat dissipation efficiency.

In summary, the structure revealed by this creation is unprecedented, and it can achieve the improvement of efficacy, and it can be used for industrial utilization. It fully complies with the new patent requirements, and invites the bureau to grant patents to encourage innovation. There is no sense of morality.

However, the drawings and descriptions disclosed above are only preferred embodiments of the present invention, and modifications or equivalent changes made by those skilled in the art in accordance with the spirit of the present invention should still be included in the scope of the patent application.

20‧‧‧thermal metal layer

30‧‧‧ Thermal coating

31‧‧‧Base

32‧‧‧Filling

40‧‧‧thermal adhesive layer

41‧‧‧ release paper

50‧‧‧Flexible metal heat sink

Claims (9)

A flexible metal heat sink comprising: a thermally conductive metal layer; and a heat dissipating coating layer coated with a fluorocarbon resin-based heat-dissipating coating mixed with a filler having a pore structure and cured in the thermally conductive metal layer Surface. The flexible metal heat sink according to claim 1, wherein the heat-dissipating coating filler is selected from the group consisting of nano bamboo charcoal, carbon nanotubes, nano zinc oxide, nano cerium oxide or a combination of the foregoing fillers. The flexible metal heat sink of claim 2, wherein the filler forms a convex structure on the surface of the heat dissipation coating. The flexible metal heat sink of claim 3, wherein the heat-dissipating coating has a binder to filler weight ratio of 1 to 5 times. The flexible metal heat sink according to any one of claims 1 to 4, wherein the thermally conductive metal layer is a flexible copper foil layer, a flexible aluminum foil layer or a flexible copper foil and aluminum foil composite layer. The flexible metal heat sink of claim 5, wherein the thermally conductive metal layer is further bonded to the other surface of the heat dissipation coating with a thermal adhesive layer. The flexible metal heat sink according to claim 6, wherein the surface of the thermal conductive adhesive layer is provided with a release paper. The flexible metal heat sink of claim 7, wherein the heat conductive adhesive layer uses a pressure sensitive adhesive. The flexible metal heat sink of claim 8, wherein the heat conductive metal layer has a thickness of 0.009 to 0.3 mm, the heat dissipation coating has a thickness of 0.018 to 0.05 mm, and the thermal conductive layer has a thickness of 0.01 to 0.3 mm. .