KR20120135991A - Heat-radiating sheet and method for manufacturing the same - Google Patents

Abstract

PURPOSE: A radiating sheet and a manufacturing method thereof are provided to improve workability by using materials flexibility and low proportion. CONSTITUTION: Metal or radiating resin is formed on an upper surface and a lower surface of a base layer(110). A first delivery layer(120) and a second delivery layer are formed on both surfaces of the base layer. A radiating adhesive layer(140) is applied to the second delivery layer. A release paper layer(150) is attached to a lower surface of the radiating adhesive layer. The base layer is formed of one of felt, woven, and fiber materials.

Description

Heat dissipation sheet and its manufacturing method {HEAT-RADIATING SHEET AND METHOD FOR MANUFACTURING THE SAME}

The present invention relates to a heat dissipation sheet and a method of manufacturing the same, and more particularly, to a heat dissipation sheet in which a metal is plated or a heat dissipation resin is coated on upper and lower surfaces of a substrate such as metal, fiber, woven fabric, and nonwoven fabric which may increase in surface area. .

In general, the uppermost layer of the heat dissipation structure is currently using a method of increasing the surface area by digging the aluminum separately, or using a thick ceramic plate. This is to increase the surface area with the air in the heat transfer from the heat source to the surface to induce cooling more quickly.

However, this method has a limitation in the processing of ceramics, and the process of digging grooves of aluminum has a problem of causing a lot of cost and high failure rate. In addition, the conventional method cannot cope with thickness with respect to the tendency of thinning of electronic structure, and in the case of a flat metal plate, there is a tendency that the practical effect is reduced by lowering the contact surface with air.

The present invention has been made in view of the above problems, using a substrate, such as fiber, woven fabric, non-woven fabric of the OPEN CELL structure, which has a large contact area with the plating or coating layer, which can maximize the contact area with air, An object of the present invention is to provide a heat dissipation sheet and a method of manufacturing the same, which may be cooled at a high speed by plating a heat conductive metal on the upper and lower surfaces of the substrate or coating a heat dissipation resin.

The present invention for achieving the above technical problem relates to a heat dissipation sheet, the first and second transfer layer is formed by plating a metal or a heat dissipation resin on the upper and lower surfaces of the base layer, respectively, the second transfer A heat dissipating adhesive layer is applied to the lower surface of the layer, and a release paper layer is attached to the bottom of the heat dissipating adhesive layer.

In addition, the base layer is characterized in that the OPEN CELL structure is open space up and down.

In addition, the base material layer is characterized in that the material of any one of fibers, woven fabrics, non-woven fabrics.

In addition, the first transfer layer and the second transfer layer, the metal is plated or heat-dissipating resin coated on the entire area of the base layer, characterized in that the structural layer for transferring heat to the upper and lower air.

The metal may be any one of aluminum, copper, nickel, silver and gold.

The heat dissipating pressure-sensitive adhesive layer is a pressure-sensitive adhesive layer, characterized in that the material of any one of silicone, acrylic, rubber and urethane material.

The heat dissipating pressure-sensitive adhesive layer is characterized by containing a heat conductive material for heat transfer from the base layer and the first and second transfer layers.

On the other hand, the present invention relates to a method for manufacturing a heat dissipation sheet, comprising the steps of: (a) forming a first transfer layer and a second transfer layer, respectively, by plating metal or heat-dissipating resin on the upper and lower surfaces of the base layer; (b) applying a heat dissipating pressure-sensitive adhesive layer on the lower surface of the second transfer layer; And (c) attaching a release paper layer to a bottom surface of the heat dissipating pressure sensitive adhesive layer. Characterized in that it comprises a.

According to the present invention as described above, using a substrate, such as a fiber, woven fabric, non-woven fabric of the OPEN CELL structure, which has a large contact area with the plating or coating layer and can maximize the contact area with air, and heat conduction on the upper and lower surfaces of the substrate By plating the available metal or coating the heat-resistant resin, there is an effect that the cooling can be made at a high speed.

And according to the present invention, by using a flexible, low specific gravity material, workability can be improved, there is also an effect capable of lightening the final product.

1 is a cross-sectional view of a heat dissipation sheet according to an embodiment of the present invention.
2 is a front view of a heat radiation sheet according to an embodiment of the present invention.
Figure 3 is an exemplary view showing the multi-layer plating of the heat radiation sheet according to an embodiment of the present invention.
4 is a flowchart illustrating a method of manufacturing a heat dissipation sheet according to an embodiment of the present invention.

Specific features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. It is to be noted that the detailed description of known functions and constructions related to the present invention is omitted when it is determined that the gist of the present invention may be unnecessarily blurred.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings.

The heat dissipation sheet according to the present invention and a manufacturing method thereof will be described with reference to FIGS. 1 to 4 as follows.

1 is a cross-sectional view of a heat dissipation sheet 100 according to an embodiment of the present invention, Figure 2 is a front view of a heat dissipation sheet according to an embodiment of the present invention.

As shown in FIG. 1, a first transfer layer 120 and a second transfer layer 130 are formed by plating metal or radiating resin on the top and bottom surfaces of the base layer 110, respectively. In addition, the heat dissipation adhesive layer 140 is applied to the bottom surface of the second transfer layer 130, and the release paper layer 150 is attached to the bottom surface of the heat dissipation adhesive layer 140.

In detail, the base layer 110 has an open cell structure in which spaces are opened up and down, and the contact area between the first transfer layer 120 and the second transfer layer 130 is wide and the contact area with air is maximized. It is made of a material such as fiber, woven fabric, nonwoven fabric.

As shown in FIG. 1, the first transfer layer 120 and the second transfer layer 130 are plated with a metal or a heat-dissipating resin coated on the entire area of the base layer 110. It is a structural layer that transfers heat to the middle.

At this time, aluminum, copper, nickel, silver and gold, such as heat conductive metal may be plated, or the heat radiation resin may be coated.

The heat dissipating pressure-sensitive adhesive layer 140 is a pressure-sensitive adhesive layer, made of a material such as silicone, acrylic, rubber, urethane, and the like, and heat transfer from the base layer 110 and the first and second transfer layers 120 and 130. For the purpose of containing thermally conductive materials such as metals, carbides and ceramics.

Here, it is also possible to attach directly with a heat source using an adhesive other than a pressure-sensitive adhesive.

The release paper layer 150 is used to protect the adhesive surface according to the use of the heat dissipating adhesive layer 140.

On the other hand, in the metal plating operation on the base layer 110, the heat release amount change according to the metal plating thickness is shown in [Table 1], the heat release change according to the increase in the surface area is shown in [Table 2]. .

Plating thickness
(Μm) 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 Temperature
(℃) 65.8 65.4 65.2 64.1 63.4 61.6 61.0 60.8 60.1 59.3 58.7

-Surface temperature measurement after 30min at 80 ℃

Surface area
(Plane surface area
100 standard) 100 150 200 250 300 350 400 Temperature
(℃) 72.4 70.8 69.4 68.6 67.2 67.0 66.3

-Surface temperature measurement after 30min at 80 ℃

On the other hand, Figure 3 is an exemplary view showing a multi-layer plating of the heat dissipation sheet according to an embodiment of the present invention, as shown, shows the primary copper plating, secondary nickel plating.

4 is a flowchart illustrating a method of manufacturing a heat dissipation sheet according to an embodiment of the present invention. As shown in FIG. 4, the first and second transfer layers 120 and 130 are formed by plating metal or radiating heat-resistant resin on the top and bottom surfaces of the base layer 110 (S10).

In addition, the heat-sensitive adhesive layer 140 is applied to the lower surface of the second transfer layer 130 (S20), and the release paper layer 150 is attached to the lower surface of the heat-resistant adhesive layer 140 (S30).

Here, the heat radiation pressure-sensitive adhesive layer 140 may not be applied when directly attached to the heat source.

While the present invention has been particularly shown and described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It will be appreciated by those skilled in the art that numerous changes and modifications may be made without departing from the invention. Accordingly, all such appropriate modifications and changes, and equivalents thereof, should be regarded as within the scope of the present invention.

100: heat dissipation sheet
110: substrate layer 120: first transfer layer
130: second transfer layer 140: heat radiation adhesive layer
150: release layer

Claims (8)

In the heat dissipation sheet,
The first and second transfer layers 120 and 130 are formed on the top and bottom surfaces of the base layer 110 by coating metal or coated with a heat-dissipating resin, respectively, on the bottom of the second transfer layer 130. Heat dissipation adhesive layer 140 is applied, the heat dissipation sheet, characterized in that the release paper layer 150 is attached to the lower surface of the heat dissipation adhesive layer 140.
The method of claim 1,
The base layer 110,
The heat dissipation sheet characterized by the OPEN CELL structure which the space opened up and down.
The method of claim 1,
The base layer 110,
A heat dissipation sheet, characterized in that the material of any one of fibers, woven fabrics, non-woven materials.
The method of claim 1,
The first transfer layer 120 and the second transfer layer 130,
The base layer 110, the metal is plated or heat-dissipating resin coated on the entire area, the heat dissipation sheet, characterized in that the structural layer for transferring heat up and down and in the air.
The method of claim 1,
The metal,
A heat radiation sheet, which is any one of aluminum, copper, nickel, silver, and gold.
The method of claim 1,
The heat dissipation adhesive layer 140,
A pressure-sensitive adhesive layer, the heat-radiating sheet, characterized in that any one of silicon, acrylic, rubber and urethane material.
The method of claim 1,
The heat dissipation adhesive layer 140,
A heat dissipation sheet, characterized in that it contains a thermally conductive material for heat transfer from the base layer (110) and the first and second transfer layers (120, 130).
In the heat radiation sheet manufacturing method,
(a) forming a first transfer layer 120 and a second transfer layer 130 on the upper and lower surfaces of the base layer 110 by coating a metal or coating a heat dissipation resin;
(b) applying a heat dissipating pressure-sensitive adhesive layer 140 on the lower surface of the second transfer layer 130; And
(c) attaching a release paper layer 150 to a lower surface of the heat dissipating adhesive layer 140; Heat radiation sheet manufacturing method comprising a.

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