WO2010084717A1 - 冷却装置 - Google Patents
冷却装置 Download PDFInfo
- Publication number
- WO2010084717A1 WO2010084717A1 PCT/JP2010/000182 JP2010000182W WO2010084717A1 WO 2010084717 A1 WO2010084717 A1 WO 2010084717A1 JP 2010000182 W JP2010000182 W JP 2010000182W WO 2010084717 A1 WO2010084717 A1 WO 2010084717A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cooling device
- space
- substrate
- liquid
- electronic component
- Prior art date
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 56
- 239000007788 liquid Substances 0.000 claims abstract description 71
- 238000001704 evaporation Methods 0.000 claims abstract description 50
- 230000008020 evaporation Effects 0.000 claims abstract description 37
- 239000000758 substrate Substances 0.000 claims description 76
- 238000009835 boiling Methods 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 8
- 229910052802 copper Inorganic materials 0.000 description 8
- 239000010949 copper Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 229910000679 solder Inorganic materials 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 6
- 238000009833 condensation Methods 0.000 description 5
- 230000005494 condensation Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000020169 heat generation Effects 0.000 description 4
- 230000003746 surface roughness Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000005488 sandblasting Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/42—Fillings or auxiliary members in containers or encapsulations selected or arranged to facilitate heating or cooling
- H01L23/427—Cooling by change of state, e.g. use of heat pipes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
Definitions
- the present invention relates to a cooling device.
- Electronic parts such as LSI and IC are used in electronic equipment such as computers. If the temperature of the electronic component rises due to heat generation, it may be difficult to achieve high-speed and stable operation. Therefore, a technique for cooling an electronic component as disclosed in the following patent document has been devised.
- JP 2001-136756 A Japanese Patent Laid-Open No. 2003-214779 JP 2004-327481 A JP 2007-208123 A
- the amount of heat generation (heat generation density) of electronic components has increased remarkably due to improvements in the degree of integration of electronic components.
- a cooling device such as a heat sink
- the size of the cooling device may need to be increased.
- the electronic device may be increased in size.
- An object of the present invention is to provide a cooling device that can suppress an increase in size and efficiently cool an electronic component.
- a space can be formed between a substrate having a first surface that supports an electronic component, a second surface opposite to the first surface, and the second surface of the substrate.
- a container and the electronic component supported by the substrate and is disposed in the space so that at least a part thereof is in contact with the liquid in the space, and based on the heat generated by the electronic component,
- a cooling device including an evaporation unit that changes a phase of at least a part of a liquid into a gas.
- an increase in size can be suppressed, and an electronic component can be efficiently cooled.
- an XYZ orthogonal coordinate system is set. The positional relationship of each part will be described with reference to this XYZ orthogonal coordinate system.
- a predetermined direction in the horizontal plane is set as the X-axis direction.
- a direction orthogonal to the X-axis direction in the horizontal plane is set as the Y-axis direction.
- a direction (vertical direction, vertical direction) orthogonal to each of the X-axis direction and the Y-axis direction is set as the Z-axis direction.
- the rotation (inclination) directions around the X, Y, and Z axes are set as ⁇ X, ⁇ Y, and ⁇ Z directions, respectively.
- FIG. 1 is an assembly diagram illustrating an example of the cooling device 100 according to the first embodiment.
- FIG. 2 is a side sectional view showing an example of the cooling device 100 according to the first embodiment.
- the cooling device 100 includes a substrate 1, a container 5, and an evaporation unit 4.
- the substrate 1 has a first surface 1A that supports the electronic component 2 and a second surface 1B that is a surface opposite to the first surface 1A.
- the container 5 can form a space 20 between the second surface 1B of the substrate 1.
- the evaporation unit 4 is thermally connected to the electronic component 2 supported by the substrate 1.
- the evaporation unit 4 is disposed in the space 20 so that at least a part thereof is in contact with the liquid 6 in the space 20.
- the evaporation unit 4 changes the phase of at least a part of the liquid 6 into a gas based on the heat generated by the electronic component 2.
- the cooling device 100 further includes a condensing unit 8.
- the condensing part 8 is arrange
- the condensing part 8 takes the heat of the gas in the space 20 and changes at least a part of the gas into a liquid.
- the cooling device 100 further includes a heat sink 7 that is thermally connected to the condensing unit 8 and dissipates heat from the condensing unit 8.
- the electronic component 2 is a semiconductor element (semiconductor chip) such as an LSI or an IC.
- the electronic component 2 generates heat when driven.
- the substrate 1 has a first surface 1A that supports the electronic component 2 and a second surface 1B that faces the opposite direction of the first surface 1A. 1 and 2, the first surface 1A faces the ⁇ X direction, and the second surface 1B faces the + X direction. The second surface 1B faces the space 20.
- the electronic component 2 is disposed at the first position on the first surface 1A.
- the substrate 1 supports a plurality of electronic components 2.
- the substrate 1 supports three electronic components 2.
- the plurality (three) of electronic components 2 are arranged at intervals in each of a plurality of different first positions on the first surface 1A.
- the container 5 can support the substrate 1.
- the container 5 faces the second surface 1B of the substrate 1 and supports at least a part of the second surface 1B.
- the space 20 is formed between the container 5 and the substrate 1 supported by the container 5.
- the container 5 includes a recess 51 and a support surface 52 that is disposed around the recess 51 and supports at least a part of the second surface 1B of the substrate 1.
- a space 20 is formed between the concave portion 51 of the container 5 and the second surface 1B of the substrate 1.
- the container 5 is made of metal.
- the metal container 5 has good thermal conductivity (high thermal conductivity).
- the container 5 may be formed of a synthetic resin. Since the synthetic resin is easy to mold, the synthetic resin container 5 can be manufactured smoothly.
- the substrate 1 and the container 5 are connected and fixed by the male screw 12.
- substrate 1 has the through-hole 1H which can arrange
- the container 5 has female screw grooves 53 at a plurality of positions on the support surface 52.
- the female screw groove 53 is formed so as to correspond to the through hole 1 ⁇ / b> H and is connected to the male screw 12.
- the through hole 1H and the female screw groove 53 are aligned, and the male screw 12 is disposed in the through hole 1H and the female screw groove 53 in a state where the support surface 52 of the container 5 and the second surface 1B of the substrate 1 are in contact with each other. The With this configuration, the substrate 1 and the container 5 are connected and fixed.
- the cooling device 100 further includes the seal member 11 disposed between the second surface 1B of the substrate 1 and the support surface 52 of the container 5.
- the seal member 11 is an O-ring, for example.
- the space 20 is substantially sealed by the seal member 11. Moreover, the leakage of the liquid 6 in the space 20 is suppressed by the seal member 11.
- the space 20 can hold the liquid 6.
- the liquid 6 is a refrigerant for cooling the electronic component 2.
- the liquid 6 desirably has a low boiling point.
- hydrofluoroether is used as the liquid 6.
- the liquid 6 may be a hydrofluorocarbon.
- the liquid 6 may contain both hydrofluoroether and hydrofluorocarbon. Hydrofluoroethers and hydrofluorocarbons have low boiling points. Hydrofluoroethers and hydrofluorocarbons are insulative and inert.
- the evaporation unit 4 is disposed on the second surface 1B of the substrate 1.
- the evaporation unit 4 includes a first member 41 supported on the second surface 1B of the substrate 1.
- the first member 41 includes a plate member 41A connected to the second surface 1B and a fin member 41B disposed on the plate member 41B.
- the first member 41 disposed on the second surface 1B is thermally connected to the electronic component 2 disposed on the first surface 1A.
- the first member 41 is made of a material having good thermal conductivity.
- the first member 41 is made of metal.
- the first member 41 is made of copper.
- the first member 41 may be formed of aluminum.
- the 1st member 41 may be formed with both copper and aluminum, and may be formed with materials (for example, other metals, such as iron) other than copper and aluminum.
- the plate member 41A and the fin member 41B may be formed of different materials.
- the substrate 1 has a thermal via 3 formed so as to connect the first surface 1A and the second surface 1B.
- Thermal via 3 includes a through hole formed so as to connect first surface 1A and second surface 1B, and a metal film formed on the inner surface of the through hole.
- the metal film is formed by plating the inner surface of the through hole.
- the inner surface of the through hole is subjected to a copper plating process.
- the electronic component 2 and the first member 41 are connected via a thermal via 3 formed on the substrate 1.
- the electronic component 2 is disposed so as to face the thermal via 3 on the first surface 1A side.
- the first member 41 is arranged to face the thermal via 3 on the second surface 1B side.
- the electronic component 2 is connected to at least a part of the thermal via 3.
- the first member 41 is connected to at least a part of the thermal via 3.
- the electronic component 2 is supported on the first surface 1 ⁇ / b> A of the substrate 1 so that at least a part thereof is in contact with the thermal via 3.
- the first member 41 is supported on the second surface 1 ⁇ / b> B of the substrate 1 so that at least a part thereof is in contact with the thermal via 3.
- the electronic component 2 has a pin.
- the pins include, for example, signal pins or power supply pins.
- the pins of the electronic component 2 can be arranged in the thermal via 3.
- the pins and the thermal via 3 are connected by solder.
- the first member 41 and the thermal via 3 are connected by solder. With this configuration, the electronic component 2 and the first member 41 are fixed to the substrate 1, and the electronic component 2 and the first member 41 (evaporating unit 4) are thermally connected via the thermal via 3.
- the thermal via 3 may also serve as a ground pin of a power source, for example.
- the first member 41 and the thermal via 3 (substrate 1) may be connected with an adhesive having good thermal conductivity.
- the surface of the first member 41 (evaporating unit 4) facing the space 20 is rough.
- the surface of the first member 41 (evaporating unit 4) is roughened and has a predetermined surface roughness.
- the surface of the first member 41 (evaporating unit 4) is roughened by sandblasting or the like so that the surface roughness is about several tens of ⁇ m to several hundreds of ⁇ m.
- the heat sink 7 is supported on the first surface 1A of the substrate 1.
- the heat sink 7 is disposed at a second position on the first surface 1A different from the first position on the first surface 1A where the electronic component 2 is disposed.
- the heat sink 7 can dissipate the heat of the electronic component 2 to the surrounding atmosphere (air space).
- the condensing unit 8 is disposed on the second surface 1B of the substrate 1.
- the condensing part 8 is arrange
- the condensing unit 8 is composed of the second member 81 supported by the second surface 1B of the substrate 1.
- the second member 81 includes a plate member 81A connected to the second surface 1B.
- the second member 81 disposed on the second surface 1B is thermally connected to the heat sink 7 disposed on the first surface 1A.
- the second member 81 is made of a material having good thermal conductivity.
- the second member 81 is made of metal.
- the second member 81 is made of copper.
- the second member 81 may be formed of aluminum.
- the 2nd member 81 may be formed with both copper and aluminum, and may be formed with materials (for example, other metals, such as iron) other than copper and aluminum.
- the heat sink 7 and the second member 81 are connected via the thermal via 3 formed on the substrate 1.
- the heat sink 7 is arranged to face the thermal via 3 on the first surface 1A side.
- the second member 81 is arranged to face the thermal via 3 on the second surface 1B side.
- the heat sink 7 is connected to at least a part of the thermal via 3, and the second member 81 is connected to at least a part of the thermal via 3.
- the heat sink 7 is supported on the first surface 1 ⁇ / b> A of the substrate 1 so that at least a part thereof is in contact with the thermal via 3.
- the second member 81 is supported on the second surface 1 ⁇ / b> B of the substrate 1 so that at least a part thereof is in contact with the thermal via 3.
- the heat sink 7 and the thermal via 3 are connected by solder.
- the second member 81 and the thermal via 3 are connected by solder.
- the heat sink 7 and the second member 81 are fixed to the substrate 1, and the heat sink 7 and the second member 81 (condensing unit 8) are thermally connected via the thermal via 3.
- the second member 81 and the thermal via 3 (substrate 1) may be connected with an adhesive having good thermal conductivity.
- the heat sink 7 may be connected to the substrate 1 via a heat dissipating grease having a good thermal conductivity or a heat dissipating sheet.
- the surface of the second member 81 (condensing unit 8) facing the space 20 is rough.
- the surface of the second member 81 (condensing unit 8) is roughened and has a predetermined surface roughness.
- the surface of the second member 81 (condensing unit 8) is roughened by sandblasting or the like so that the surface roughness is about several tens of ⁇ m to several hundreds of ⁇ m.
- the surface of the second member 81 (condensing unit 8) may not be roughened.
- the second member 81 may include a plate member and a fin member connected to the plate member.
- the surface of the 2nd member 81 (condensing part 8) containing a plate member and a fin member may be roughened.
- the surface of the 2nd member 81 (condensing part 8) containing a plate member and a fin member does not need to be roughened.
- the cooling device 100 includes a supply port 13 that is disposed in the container 5 and supplies the liquid 6 to the space 20. By supplying the liquid 6 from the supply port 13 to the space 20, the liquid 6 is held in the space 20.
- the pressure in the space 20 is adjusted so that the boiling point of the liquid 6 in the space 20 is substantially normal temperature (for example, 23 ° C.). In the present embodiment, the pressure in the space 20 is at least lower than atmospheric pressure.
- the liquid 6 is supplied from the supply port 13 to the space 20.
- a predetermined amount of liquid LQ is supplied to the space 20.
- a suction device such as a vacuum pump is connected to the supply port 13 via a tube. Then, the suction device is activated and the pressure in the space 20 is reduced.
- the suction device adjusts the pressure of the space 20 so as to be at least lower than the atmospheric pressure. As the pressure in the space 20 decreases, the boiling point of the liquid 6 in the space 20 decreases. In the present embodiment, the pressure in the space 20 is adjusted so that the boiling point of the liquid 6 in the space 20 is approximately room temperature.
- the supply port 13 is closed.
- the sealing member is disposed at the supply port 13
- the supply port 13 is closed, and the state where the pressure of the space 20 is reduced is maintained.
- a valve mechanism capable of opening and closing the supply port 13 can be used.
- the substrate 1 When the pressure in the space 20 decreases, the substrate 1 is deformed due to a pressure difference between the pressure on the first surface 1A side (atmospheric pressure) of the substrate 1 and the pressure on the second surface 1B side (pressure in the space 20).
- there is a possibility for example, by arranging a rim member inside the space 20, deformation of the substrate 1 can be suppressed.
- the electronic component 2 is driven in a state where the cooling device 100 is disposed so that the first surface 1A and the second surface 1B are parallel to the YZ plane.
- the space (so that the position (height) of the surface of the liquid 6 in the space 20 is higher than the position (height) of the electronic component 2 in the Z-axis direction.
- a predetermined amount of liquid 6 is held at 20.
- the heat of the electronic component 2 is transmitted to the second surface 1B side of the substrate 1.
- the heat generated by the electronic component 2 is transmitted to the first member 41 (evaporating unit 4) via the thermal via 3. Thereby, the temperature of the 1st member 41 (evaporating part 4) rises.
- the temperature of the evaporating unit 4 rises, at least a part of the liquid 6 in the space 20 in contact with the evaporating unit 4 is heated and changes into a gas phase. That is, the temperature of the evaporation unit 4 rises based on the heat generated by the electronic component 2, and the temperature of at least a part of the liquid 6 in the space 20 in contact with the evaporation unit 4 rises above the boiling point of the liquid 6. In this case, at least a part of the liquid 6 changes into a gas. Thereby, bubbles are generated in the vicinity of the evaporation unit 4.
- the pressure of the space 20 is adjusted so that the boiling point of the liquid 6 in the space 20 is approximately room temperature. Therefore, at least a part of the liquid 6 in contact with the evaporation unit 4 that is thermally connected to the electronic component 2 can be smoothly changed into a gas by heat generated by the electronic component 2.
- the surface of the evaporation part 4 is rough, gas can be generated smoothly from the liquid 6 in contact with the evaporation part 4. That is, since the surface of the evaporation unit 4 is rough, the number of nuclei in which bubbles are generated can be increased. As a result, the phase of the liquid 6 can be smoothly changed to a gas.
- the gas generated in the evaporation unit 4 moves in the + Z direction in the liquid 6 (that is, the gas generated in the evaporation unit 4 rises). As the gas moves in the liquid 6 in the + Z direction, the volume of the gas (bubbles) increases (that is, the volume of the gas (bubbles) expands).
- FIG. 3 for example, a flow of the liquid 6 as shown by an arrow 9 in FIG. 3 is generated, and the gas generated in the evaporation unit 4 moves toward the condensation unit 8 that is thermally connected to the heat sink 7. Moving. That is, the gas generated in the evaporation unit 4 moves toward the condensing unit 8 together with the flowing liquid 6 as indicated by the arrow 9.
- the interval of 41B is desirably about 1 mm to several mm.
- the heat of the condensing unit 8 that has taken heat from the gas is transmitted to the heat sink 7 through the thermal via 3, and is dissipated to the surrounding atmosphere through the heat sink 7.
- the liquid 6 phase-changed from gas in the condensing unit 8 or the liquid 6 near the condensing unit 8 moves downward by the action of gravity. Further, in the space 20, a flow of the liquid 6 as shown by an arrow 10 in FIG. 3 is generated, and the liquid 6 generated by the condensing unit 8 or the liquid 6 near the condensing unit 6 is evaporated by the evaporating unit 4. Move towards.
- the vaporization (evaporation) of the liquid 6 in the evaporation unit 7 and the liquefaction (condensation) of the gas in the condensation unit 8 are performed. That is, a circulation cycle of evaporation and condensation is generated in the space 20.
- This circulation cycle of evaporation and condensation is performed by latent heat without increasing temperature. Therefore, the heat transport capacity of this circulation cycle reaches several to several tens of times, for example, compared to the heat conduction of copper.
- the cooling device 100 of this embodiment has a flat plate shape, and constitutes a flat plate boiling cooler that can cool the electronic component 2 in the above-described circulation cycle.
- the flow of the liquid 6 and the gas can be generated by the action of gravity while the liquid 6 and the substrate 1 are in direct contact with each other. That is, convection can be generated in the liquid 6. Therefore, the electronic component 2 supported by the substrate 1 can be efficiently cooled.
- the cooling device 100 can be downsized (thinned), and the electronic device on which the electronic component 2 and the cooling device 100 are mounted can be downsized. it can. Also, a high-speed processor can be mounted as the electronic component 2.
- each electronic component 2 emits using the substrate 1 that supports the electronic component 2 and the liquid 6 that contacts the substrate 1. After diffusing heat, the gas generated based on the heat is moved to the condensing unit 8. Therefore, high cooling efficiency can be obtained while suppressing an increase in the number of the heat sinks 7 thermally connected to the condensing unit 8 and the condensing unit 8. That is, the plurality of electronic components 2 can be efficiently cooled without depending on the layout of the electronic components 2. For example, even if the heat generation density locally increases on the substrate 1, each of the plurality of electronic components 2 can be cooled by the convection liquid 6.
- an inert liquid (hydrofluoroether, hydrofluorocarbon, etc.) that has insulating properties and can suppress the occurrence of corrosion or the like of the substrate 1 is used as the liquid 6. Therefore, deterioration of the cooling device 100 can be suppressed.
- the liquid 6 is flowed in the space 20 having a predetermined size. Therefore, the degree of freedom in selecting the liquid 6 to be used can be increased. For example, even when the liquid 6 having a low surface tension is used, the electronic component 2 can be cooled by smoothly flowing the liquid 6 in the space 20.
- the structure of the cooling device 100 is simple, and a wide area of the first surface 1A of the substrate 1 can be cooled. Therefore, it is possible to suppress a decrease in the degree of freedom of layout of the electronic component 2.
- electronic parts 2 having different shapes and sizes can be disposed on the first surface 1A of the substrate 1 supported by the container 5 for general use.
- an input / output interface connector and cable can be arranged on the first surface 1A of the substrate 1.
- the space 20 is formed between the substrate 1 and the container 5, and the substrate 1 and the container 5 can be separated. Therefore, for example, various operations such as the operation of placing the electronic component 2 on the substrate 1 can be performed smoothly. Moreover, versatility can be given to each of the substrate 1 and the container 5.
- the thermal via 3 may not be provided.
- the heat of the electronic component 2 is transmitted to the first member 41 disposed on the second surface 1 ⁇ / b> B via the substrate 1.
- the heat of the electronic component 2 is well transferred to the first member 41 via the substrate 1.
- a solder pad may be provided on the second surface 1B of the substrate 1 to connect the first member 41 and the substrate 1 via the solder pad.
- the thermal via 3 between the heat sink 7 and the second member 81 may be omitted.
- the heat of the second member 81 is transmitted to the heat sink 7 disposed on the first surface 1 ⁇ / b> A via the substrate 1.
- a solder pad may be provided on the second surface 1B of the substrate 1, and the second member 81 and the substrate 1 may be connected via the solder pad.
- the first member 41 may be omitted. In that case, at least a part of the second surface 1B of the substrate 1 functions as an evaporation unit.
- the second member 81 may be omitted. In that case, at least a part of the second surface 1B of the substrate 1 functions as a condensing unit.
- FIG. 4 is a diagram illustrating an example of the cooling device 100B according to the second embodiment.
- the cooling device 100 ⁇ / b> B includes a first member 41 that functions as the evaporation unit 4.
- the first member 41 does not include a fin member and is configured by a plate member 41A. The surface of the plate member 41A is roughened.
- the evaporation unit 4 may not include the fin member.
- the fin member may be disposed on the second member 81 without disposing the fin member on the first member 41.
- the cooling device 100 ⁇ / b> C includes a substrate 1, a container 5, an evaporation unit 4, a condensing unit 8, and a heat sink 7.
- the substrate 1 has a first surface 1A that supports the electronic component 2 and a second surface 1B opposite to the first surface 1A.
- the container 5 can form a space 20 between the second surface 1B of the substrate 1.
- the evaporation unit 4 is thermally connected to the electronic component 2 supported by the substrate 1. It arrange
- the evaporation unit 4 changes the phase of at least a part of the liquid 6 into a gas based on the heat generated by the electronic component 2.
- the condensing part 8 is arrange
- the condensing unit 8 takes the heat of the gas and changes the phase of at least a part of the gas to the liquid 6.
- the heat sink 7 is thermally connected to the condensing unit 8 and dissipates heat from the condensing unit 8.
- the heat sink 7 is disposed in the container 5.
- the heat sink 7 is integral with the container 5.
- the heat sink 7 and the container 5 may be separate. When the heat sink 7 and the container 5 are separated from each other, the heat sink 7 and the container 5 are thermally connected to each other via a heat radiation grease, a heat radiation sheet, or the like having good thermal conductivity.
- the electronic component 2 can be efficiently cooled.
- cooling devices 100, 100B, and 100C cool the semiconductor element (semiconductor chip) as the electronic component 2
- the cooling device of each of the above-described embodiments can also be applied to cooling electronic components that generate heat other than semiconductor elements.
- the cooling device of each embodiment is applicable also to the air-conditioning equipment of a server room. While the present invention has been described with reference to the embodiments, the present invention is not limited to the above embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.
- the present invention can be applied to a cooling device. According to this cooling device, the enlargement can be suppressed, and the electronic component can be efficiently cooled.
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- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
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- Cooling Or The Like Of Electrical Apparatus (AREA)
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Abstract
Description
第1実施形態について説明する。図1は、第1実施形態に係る冷却装置100の一例を示す組立図である。図2は、第1実施形態に係る冷却装置100の一例を示す側断面図である。
次に、第2実施形態について説明する。以下の説明において、上述の実施形態と同一又は同等の構成部分については同一の符号を付し、その説明を簡略若しくは省略する。
次に、第3実施形態について説明する。以下の説明において、上述の実施形態と同一又は同等の構成部分については同一の符号を付し、その説明を簡略若しくは省略する。
基板1は、電子部品2を支持する第1面1Aと、第1面1Aの反対側の第2面1Bとを有する。容器5は、基板1の第2面1Bとの間で空間20を形成できる。蒸発部4は、基板1に支持された電子部品2と熱的に接続される。蒸発部4の少なくとも一部が空間20内の液体6と接触するように空間20に配置される。蒸発部4は、電子部品2が発する熱に基づいて、液体6の少なくとも一部を気体に相変化させる。凝縮部8は、少なくとも一部が空間20内の液体6及び気体の少なくとも一方と接触するように空間20に配置される。凝縮部8は、その気体の熱を奪って、気体の少なくとも一部を液体6に相変化させる。ヒートシンク7は、凝縮部8と熱的に接続され、凝縮部8からの熱を放散する。
以上、実施形態を参照して本願発明を説明したが、本願発明は上記実施形態に限定されない。本願発明の構成や詳細には、本願発明のスコープ内で当業者が理解し得る様々な変更をすることができる。
1A 第1面
1B 第2面
2 電子部品
3 サーマルビア
4 蒸発部
5 容器
6 液体
7 ヒートシンク
8 凝縮部
13 供給口
100,100B,100C 冷却装置
Claims (15)
- 電子部品を支持する第1面と、前記第1面の反対側の第2面とを有する基板と、
前記基板の第2面との間で空間を形成可能な容器と、
前記基板に支持された前記電子部品と熱的に接続され、少なくとも一部が空間内の液体と接触するように前記空間に配置され、前記電子部品が発する熱に基づいて、前記液体の少なくとも一部を気体に相変化させる蒸発部と、を備えた冷却装置。 - 前記蒸発部は、前記第2面に配置され、
前記電子部品と前記蒸発部とは、前記基板に形成されたサーマルビアを介して接続される請求項1記載の冷却装置。 - 前記蒸発部の表面は、粗面処理されている請求項1又は2記載の冷却装置。
- 前記蒸発部は、フィン部材を含む請求項1~3のいずれか一項記載の冷却装置。
- 少なくとも一部が前記空間内の液体及び気体の少なくとも一方と接触するように前記空間に配置され、前記気体の熱を奪って、前記気体の少なくとも一部を液体に相変化させる凝縮部をさらに備える請求項1~4のいずれか一項記載の冷却装置。
- 前記凝縮部と熱的に接続され、前記凝縮部からの熱を放散するヒートシンクをさらに備える請求項5記載の冷却装置。
- 前記ヒートシンクは、前記電子部品が配置される前記第1面の第1位置とは異なる前記第1面の第2位置に配置される請求項6記載の冷却装置。
- 前記ヒートシンクは、前記容器に配置される請求項6記載の冷却装置。
- 前記凝縮部は、前記第2面に配置され、
前記ヒートシンクと前記凝縮部とは、前記基板に形成されたサーマルビアを介して接続される請求項6又は7記載の冷却装置。 - 前記凝縮部の表面は、粗面処理されている請求項6~9のいずれか一項記載の冷却装置。
- 前記凝縮部は、フィン部材を含む請求項6~10のいずれか一項記載の冷却装置。
- 前記容器は、凹部と、前記凹部の周囲に配置され、前記第2面の少なくとも一部を支持する支持面とを有し、
前記第2面と前記支持面との間に配置されたシール部材を有する請求項1~11のいずれか一項記載の冷却装置。 - 前記空間は、略密閉されている請求項1~12のいずれか一項記載の冷却装置。
- 前記空間の圧力は、前記液体の沸点が略常温になるように調整されている請求項1~13のいずれか一項記載の冷却装置。
- 前記容器に配置され、前記空間に前記液体を供給する供給口をさらに備える請求項1~14のいずれか一項記載の冷却装置。
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US13/143,416 US8593810B2 (en) | 2009-01-23 | 2010-01-14 | Cooling device |
JP2010547426A JPWO2010084717A1 (ja) | 2009-01-23 | 2010-01-14 | 冷却装置 |
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US20110279978A1 (en) | 2011-11-17 |
US8593810B2 (en) | 2013-11-26 |
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