JPH10145064A - Highly radiative thermal conduction component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To always closely contact a high thermal conductivity sheet-like material to heating members even when there is a height variation by using pistons to press this material to the heating members. SOLUTION: A heat sink 1 has one surface facing a mounting board 2. A bent high thermal conductivity sheet-like material 6 is contacted and fixed to the one surface of the heat sink 1 by a retainer 7 or adhesives. Pistons 4 are inserted in through-holes or recesses of the heat sink 1 and hung down by springs 5 fixed, using the heat sink 1 such that the pistons 4 press the sheet- like material 6 bent on the one surface of the heat sink 1 to heating members 3a, 3b on the mounting board 2. Even if the heating members 3a, 3b have a height variation, the sheet-like material 6 can be always closely contacted thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat dissipating heat transfer component which is disposed between a heating element disposed on a substrate and a cooling component and transmits heat generated from the heating element to the cooling component. About.

[0002]

2. Description of the Related Art In recent years, electronic components mounted on a circuit board have been integrated at a high density, and the amount of heat generated by the electronic components has been increasing. The performance of electronic components is protected from heat by making contact. In general, when electronic components are mounted on a circuit board, the electronic components often have different heights. Therefore, a heat transfer component capable of absorbing variations in height of the electronic components is required.

FIG. 6 is a schematic sectional view of a conventional heat transfer component capable of absorbing height variations. Figure 6 shows a conventional heat transfer component.
As shown in FIG. 3, the casing 101 includes a casing 103 that holds a piston 101 by a spring 102. Part of the piston 101 is accommodated in a hole opened in the casing 103, and is suspended and supported by a spring 102 fixed to the bottom of the hole. The position of the piston 101 is determined by
05 corresponds to the LSI chip 106 mounted on the LSI chip. The casing 103 of the heat transfer component is connected via a heat conductive grease 107 to a cooling plate 109 which is a cooling component through which cooling water 108 circulates.

With such a configuration, heat generated from the plurality of LSI chips 106 passes through the pistons 101 pressed against the respective chips 106 even if the LSI chips 106 vary in height. The heat is transmitted to the casing 103, the heat conductive grease 107, and the cooling plate 109 in this order through the gap 110.

[0005]

However, in the heat transfer component according to the prior art shown in FIG. 6, there is a gap between the piston in direct contact with the heating element and the casing connected to the cooling component. There is a problem that heat resistance is large and cooling efficiency is poor. In order to solve this problem, there is a method in which a coolant such as helium gas is filled in the gap. However, since a sealing means is required, it becomes expensive.

SUMMARY OF THE INVENTION An object (object) of the present invention is to provide an inexpensive and high-thermal-conductivity heat transfer component in view of the above-mentioned problems of the prior art.

[0007]

In order to achieve the above object, a high heat radiation heat transfer component according to the present invention comprises a through hole or a recess corresponding to the position of a plurality of heating elements having different heights mounted on a substrate. Formed plate-shaped cooling component, a high heat conductive sheet material tightly fixed to the cooling component so as to cover the through-hole or depression in a bent state, and passed through the through-hole or depression, And a piston suspended and supported by elastic means fixed using the cooling component, wherein the highly heat conductive sheet material is pressed against the heating element by the piston.

[0008] It is preferable that a plurality of the high thermal conductive sheet materials are stacked, and that the materials are arranged in two or more directions so as to intersect at the position of the piston.

Preferably, the elastic means is a coil spring or a leaf spring.

(Function) In the invention as described above, the highly thermally conductive sheet material, which is tightly fixed to the surface of the plate-shaped cooling component in a bent state by the piston suspended and supported by the elastic means, is provided on the substrate. By pressing on the heating element above,
Even if the heating element mounted on the board has a height variation,
Due to the stroke of the elastic means and the bending of the high heat conductive sheet material, each of the heating elements having different heights is always in close contact with the high heat conductive sheet material. In such a close contact state, the heat generated from the heating element is transmitted to the cooling component through the heat transfer path of only the high heat conductive sheet material. Therefore, a heat transfer component having high heat conductivity is obtained.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view schematically showing one embodiment of the high heat radiation heat transfer component of the present invention, and FIG. 2 is a view for explaining the flow of heat during heat radiation in the heat transfer component shown in FIG. FIG.

As shown in FIG. 1, the heat-radiating heat transfer component of this embodiment has a heat-dissipating plate 1 which is a cooling component made of a metal plate having good heat conductivity, for example, a copper plate or an aluminum alloy plate. The heat radiating plate 1 may be one in which cooling water circulates as in the prior art.

The radiator plate 1 has through holes or depressions corresponding to the positions of the plurality of heating elements 3a and 3b having different heights mounted on the mounting board 2. On the surface of the heat sink 1 on the side of the mounting board 2, a highly heat conductive sheet material 6 in a bent state is provided.
Is tightly fixed by a holding plate 7 or an adhesive so as to cover the through hole or the depression. Examples of the high heat conductive sheet material 6 include carbon graphite and copper foil. A piston 4 is passed through each of the through holes or depressions of the heat sink 1, and is suspended and supported by a spring 5 which is an elastic means fixed using the heat sink 1. Then, the high thermal conductive sheet material 6 tightly fixed in a bent state to the surface of the heat sink 1 on the mounting board 2 side by each of the suspended and supported pistons 4 forms the heating element 3 a on the mounting board 2. , 3b.

In the above configuration, the heating element 3 on the mounting board 2
Even if the heights a and 3b vary, the heating elements 3a and 3b are always kept in close contact with the high heat conductive sheet material 6 by the stroke of the spring 5 and the bending of the high heat conductive sheet material 6. In such a close contact state, as shown in FIG. 2, heat generated from the heating elements 3a and 3b is transmitted to the heat radiating plate 1 through the highly heat conductive sheet material 6. As described above, in the present embodiment, since the heat transfer path is only the high heat conductive sheet material 6, the heat resistance is extremely low and the heat radiation efficiency is high.

Next, various modifications based on the above-described embodiment will be described with reference to FIGS. 3 to 5. In these drawings, the same components as those shown in FIGS. Have the same reference numerals.

FIG. 3 is a sectional view schematically showing a first modified example based on one embodiment of the high heat radiation heat transfer component of the present invention. As shown in this figure, the high heat dissipation heat transfer component of the above-described embodiment may have improved heat dissipation by stacking a plurality of high heat conductivity sheet-like materials 6.

FIG. 4 is a sectional view showing a characteristic portion of a second modified example based on one embodiment of the high heat radiation heat transfer component of the present invention.
As shown in this figure, the heat-radiating heat-transfer component of the above-described embodiment is configured such that the highly heat-conductive sheet material 6 is drawn out in two or more directions so as to intersect at the tip end surface of the piston 4 so that the high heat-conductive sheet The heat radiation may be improved by increasing the contact area with the heat radiating plate 1 when the shape material 6 is bonded to the heat radiating plate 1.

FIG. 5 is a sectional view schematically showing a third modified example based on one embodiment of the high heat radiation heat transfer component of the present invention. As shown in this drawing, the heat-radiating heat-transfer component of the above-described embodiment is configured such that the coil-shaped spring 5 serving as the elastic means is connected to the leaf spring 1.
By changing to 5, the height of the entire heat transfer component may be reduced.

[0020]

As described above, according to the present invention, a plate-shaped cooling component having a through hole or a depression formed corresponding to a heating element on a substrate, and covering the through hole or the depression in a bent state. Highly heat-conductive sheet-like material tightly fixed to the cooling component, and a piston that is passed through the through-hole or the recess and is suspended and supported by elastic means fixed using the cooling component, The high heat conductive sheet-shaped material is pressed against the heating element by the piston to constitute a high heat radiation heat transfer component, so that even if the heating element has a height variation, each heat generating element always has a high heat conductive sheet shape. The material can be adhered. The heat transfer path of the heat generated from the heating element is a path that is transmitted to the cooling component through the high heat conductive sheet material, so that the heat transfer component has high heat conductivity, and the structure is simple and inexpensive. .

[Brief description of the drawings]

FIG. 1 is a cross-sectional view schematically showing one embodiment of a high heat radiation heat transfer component of the present invention.

FIG. 2 is a view for explaining the flow of heat during heat dissipation in the heat transfer component shown in FIG.

FIG. 3 is a cross-sectional view schematically showing a first modified example based on one embodiment of the high heat radiation heat transfer component of the present invention.

FIG. 4 is a cross-sectional view showing a characteristic portion of a second modified example based on one embodiment of the high heat dissipation heat transfer component of the present invention.

FIG. 5 is a cross-sectional view schematically showing a third modified example based on one embodiment of the high heat radiation heat transfer component of the present invention.

FIG. 6 is a schematic cross-sectional view showing a conventional cooling device including a heat transfer component capable of absorbing height variations.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 heat sink 2 mounting board 3, 3 a, 3 b heating element 4 piston 5 spring 6 high heat conductive sheet material 7 holding plate 15 leaf spring

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Katsushi Sugai 1-32-1, Asahimachi, Nerima-ku, Tokyo Advantest Co., Ltd.

Claims (4)

[Claims] 1. A plate-shaped cooling component having through holes or depressions formed corresponding to the positions of a plurality of heating elements having different heights mounted on a substrate, and the through holes or depressions being bent. A high heat conductive sheet-like material tightly fixed to the cooling component so as to cover, and a piston that is passed through the through hole or the recess and is suspended and supported by elastic means fixed using the cooling component. A highly heat-radiating heat transfer component formed by pressing the highly heat-conductive sheet material against the heating element by the piston. 2. The high heat radiation heat transfer component according to claim 1, wherein a plurality of the high heat conductive sheet materials are stacked. 3. The high heat radiation heat transfer component according to claim 1, wherein the high heat conductive sheet material is disposed in two or more directions so as to intersect at the position of the piston. 4. The high heat radiation heat transfer component according to claim 1, wherein said elastic means is a coil spring or a leaf spring.