WO2022059517A1 - ベーパーチャンバー - Google Patents
ベーパーチャンバー Download PDFInfo
- Publication number
- WO2022059517A1 WO2022059517A1 PCT/JP2021/032412 JP2021032412W WO2022059517A1 WO 2022059517 A1 WO2022059517 A1 WO 2022059517A1 JP 2021032412 W JP2021032412 W JP 2021032412W WO 2022059517 A1 WO2022059517 A1 WO 2022059517A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sheet
- convex portion
- vapor chamber
- wick
- cross
- Prior art date
Links
- 239000012530 fluid Substances 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 description 13
- 230000008961 swelling Effects 0.000 description 11
- 238000009792 diffusion process Methods 0.000 description 10
- 238000003466 welding Methods 0.000 description 10
- 238000005304 joining Methods 0.000 description 9
- 238000009835 boiling Methods 0.000 description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- 239000007791 liquid phase Substances 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000005530 etching Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000032258 transport Effects 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000005219 brazing Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- -1 and the like Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
- H05K7/20336—Heat pipes, e.g. wicks or capillary pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0233—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes the conduits having a particular shape, e.g. non-circular cross-section, annular
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/04—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure
- F28D15/046—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure characterised by the material or the construction of the capillary structure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/12—Elements constructed in the shape of a hollow panel, e.g. with channels
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2225/00—Reinforcing means
- F28F2225/04—Reinforcing means for conduits
Definitions
- the present invention relates to a vapor chamber.
- the vapor chamber has a structure in which a working medium and a wick that transports the working medium by capillary force are enclosed inside the housing.
- the working medium absorbs heat from the heat generating element in the evaporation part that absorbs heat from the heat generating element, evaporates in the vapor chamber, moves to the condensing part, is cooled, and returns to the liquid phase.
- the working medium that has returned to the liquid phase moves to the evaporation part on the heat generating element side again by the capillary force of the wick, and cools the heat generating element.
- the vapor chamber operates independently without having external power, and can diffuse heat two-dimensionally at high speed by utilizing the latent heat of vaporization and the latent heat of condensation of the working medium.
- the vapor chamber is also required to be thinner in order to support the thinner mobile terminals such as smartphones and tablets. In such a thin vapor chamber, it is required to secure both mechanical strength and heat transfer efficiency.
- Patent Document 1 discloses a vapor chamber using a housing in which a pillar is provided between two sheets. A convex portion, a wick, and a pillar are overlapped on this housing, and their contacts are loosely joined by diffusion joining or the like. With such a structure, the maximum heat transport amount can be increased in the thin structure.
- the hydraulic fluid When the vapor chamber is used at a temperature higher than the boiling point of the hydraulic fluid, the hydraulic fluid is vaporized and the internal pressure inside the housing of the vapor chamber tends to increase. When the internal pressure inside the housing of the vapor chamber becomes high, the joint between the convex portion and the wick may be peeled off, and the vapor chamber may swell. This effect becomes more pronounced when a low boiling point hydraulic fluid is used to further improve the performance of the vapor chamber.
- the present invention has been made to solve the above problems, and an object of the present invention is to provide a vapor chamber that can prevent the vapor chamber from swelling when the internal pressure inside the housing becomes high. It is also an object of the present invention to provide an electronic device provided with the vapor chamber.
- the vapor chamber of the present invention is composed of an opposing first sheet and a second sheet to which outer edges are joined, and has an internal space between the inner wall surface of the first sheet and the inner wall surface of the second sheet.
- the working fluid sealed in the internal space of the housing, a plurality of convex portions arranged at intervals on the inner wall surface of the first sheet, and arrangement at intervals on the inner wall surface of the second sheet.
- a plurality of columns and a wick arranged between the columns and the convex portion are provided, and the convex portion has the plurality of first convex portions and the area of the cross section perpendicular to the height direction.
- a plurality of second convex portions larger than the first convex portion are included, and the column is arranged at a position where the support column overlaps the second convex portion in a plan view from a direction in which the first sheet and the second sheet face each other.
- the support is joined to the wick, and the wick is joined to the second convex portion.
- the electronic device of the present invention is characterized by comprising the vapor chamber of the present invention.
- the present invention it is possible to provide a vapor chamber that can prevent the vapor chamber from swelling when the internal pressure inside the housing becomes high.
- FIG. 1 is a cross-sectional view schematically showing an example of the structure of a vapor chamber.
- FIG. 2 is a cross-sectional top view schematically showing an example of a vapor chamber.
- FIG. 3 is a top view schematically showing an example of the overlap of the positions of the support column and the second convex portion.
- FIG. 4 is a top view schematically showing another example of the overlap of the positions of the support column and the second convex portion.
- FIG. 5 is a cross-sectional top view schematically showing an example of another structure of the vapor chamber.
- FIG. 6 is a cross-sectional view taken along the line BB of FIG.
- FIG. 7 is a photograph showing the appearance of the peeled surface of Comparative Example 1.
- FIG. 8 is a photograph showing the appearance of the peeled surface of Example 1.
- the present invention is not limited to the following configuration, and can be appropriately modified and applied without changing the gist of the present invention. It should be noted that a combination of two or more of the individual desirable configurations of the present invention described below is also the present invention.
- FIG. 1 is a cross-sectional view schematically showing an example of the structure of a vapor chamber.
- the vapor chamber 1 shown in FIG. 1 is composed of the first sheet 11 and the second sheet 12 facing each other, and has an internal space 13 between the inner wall surface 11a of the first sheet 11 and the inner wall surface 12a of the second sheet 12.
- the wick 30 is arranged along the directions of the inner wall surface 11a of the first sheet 11 and the inner wall surface 12a of the second sheet 12.
- the first sheet 11 and the second sheet 12 are joined to each other by a sealing portion 50 at the outer edge and sealed.
- the convex portion 60 may be integrated with the first sheet 11, and may be formed, for example, by etching the inner wall surface 11a of the first sheet 11.
- the support column 40 may be integrated with the second sheet 12, and may be formed, for example, by etching the inner wall surface 12a of the second sheet 12.
- both the convex portion 60 (the first convex portion 61 and the second convex portion 62) and the support column 40 are columnar.
- the hydraulic fluid 20 exists as a liquid phase in the wick 30 and in the internal space 13 between the convex portions 60. Further, the hydraulic fluid 20 mainly exists as a gas phase (water vapor when the hydraulic fluid is water) in the internal space 13 between the columns 40.
- the heat generating member 70 is arranged on the main surface (outer wall surface) of the first sheet 11 that does not face the second sheet 12.
- the heat generating member include electronic components of electronic devices, such as a central processing unit (CPU). Due to the heat of the heat generating member 70, the hydraulic fluid 20 of the liquid phase is vaporized directly above the heat generating member 70, and the heat of the heat generating member 70 is taken away and the vaporized hydraulic fluid moves from the wick 30 to the internal space 13 between the columns 40. .. The vaporized hydraulic fluid 20 moves inside the housing 10 and condenses near the outer edge of the housing 10 to form a liquid phase.
- CPU central processing unit
- the hydraulic fluid 20 that has become a liquid phase is absorbed by the wick 30 by the capillary force of the wick 30, moves in the wick 30 again toward the heat generating member 70, and works to take away the heat of the heat generating member 70.
- the hydraulic fluid circulates and moves in the housing in this way, so that the heat generating member is cooled by the vapor chamber.
- the heat generating member 70 may be arranged on the main surface (outer wall surface) of the second sheet 12 that does not face the first sheet 11.
- FIG. 2 is a cross-sectional top view schematically showing an example of a vapor chamber.
- FIG. 2 shows a top view from the side of the second sheet 12 constituting the vapor chamber 1, and shows the arrangement of the convex portion 60 through the second sheet 12 and the wick 30.
- FIG. 1 is a cross-sectional view shown by cutting the vapor chamber 1 in the cross section AA shown in FIG.
- the convex portion 60 has a plurality of first convex portions 61 and a plurality of second convex portions 62 larger than the first convex portion 61.
- the convex portion means a portion having a height relatively higher than the surroundings, and is formed by a concave portion (for example, a groove) formed on the inner wall surface in addition to the portion protruding from the inner wall surface of the first sheet. Including the part where the height is relatively high. Further, the size of the convex portion is determined by the size of the area of the cross section perpendicular to the height direction.
- the columns are arranged at positions where they overlap with the second convex portion in a plan view from the direction in which the first sheet and the second sheet face each other.
- the strut By arranging the strut at a position overlapping the second convex portion having a large area, the strut, the wick and the second convex portion are strongly joined. Therefore, since the joint strength between the convex portion (second convex portion) and the wick becomes strong, it is possible to prevent the vapor chamber from swelling when the internal pressure inside the housing becomes high. Specifically, even when the vapor chamber is used at a temperature exceeding the boiling point of the hydraulic fluid, it is possible to prevent the vapor chamber from swelling. Therefore, it is also suitable when a hydraulic fluid having a low boiling point is used.
- the support column and the wick are joined, and the wick and the second convex portion are joined.
- These joining methods are not particularly limited, and examples thereof include laser welding, resistance welding, diffusion joining, solder joining, and brazing. Among these, it is preferable that they are joined by diffusion joining. Since these parts can be firmly bonded by diffusion bonding, it is possible to more reliably prevent the vapor chamber from swelling when the internal pressure inside the housing becomes high.
- FIG. 3 is a top view schematically showing an example of the overlap of the positions of the support column and the second convex portion.
- This top view is a plan view from the direction in which the first sheet and the second sheet face each other.
- the support column 40 is arranged at a position overlapping the second convex portion 62. That is, the support column 40 overlaps with the second convex portion 62 having a large cross-sectional shape.
- FIG. 3 shows a form in which all of the columns 40 overlap with the second convex portion 62. That is, 100% of the area of the column overlaps with the second convex portion 62.
- the ratio of the area where the column overlaps with the second convex portion is not particularly limited, but it is preferable that 75% or more of the area of the column overlaps with the second convex portion.
- FIG. 4 is a top view schematically showing another example of the overlap of the positions of the support column and the second convex portion.
- FIG. 3 shows an example in which all of the columns 40 overlap with the second convex portion 62
- FIG. 4 shows an example in which a part of the columns 40 overlaps with the second convex portion 62.
- the area of the cross section perpendicular to the height direction of the second convex portion is preferably larger than the area of the cross section perpendicular to the height direction of the column.
- the area of the cross section perpendicular to the height direction of the second convex portion 62 is larger than the area of the cross section perpendicular to the height direction of the support column 40. ..
- the ratio of the area of the cross section perpendicular to the height direction of the second convex portion to the area of the cross section perpendicular to the height direction of the column is preferably 100% or more and 130% or less.
- the shape of the cross section of the column perpendicular to the height direction is not particularly limited, and may be a circle or a polygon (triangle, quadrangle (rectangle, square), pentagon, hexagon).
- the cross-sectional shapes of the strut and the second convex portion may be the same or different, but it is preferable that the cross-sectional shapes of the strut and the second convex portion are similar. Further, the cross-sectional shapes of the support column and the second convex portion may be the same (joint). 3 and 4 show that the shapes of the support column and the second convex portion are both circular.
- the columns support the first and second sheets from the inside.
- By arranging the columns inside the housing it is possible to prevent the housing from being deformed when the inside of the housing is depressurized or when external pressure from the outside of the housing is applied.
- the arrangement of the columns is not particularly limited, but it is preferable that the columns are evenly arranged. For example, they are arranged in a grid pattern or in a staggered pattern so that the distance between adjacent columns is constant. By arranging the columns evenly, uniform strength can be ensured over the entire vapor chamber. Further, the distance between adjacent columns is preferably 1 mm or more and 5 mm or less. The distance between adjacent columns is the distance between adjacent columns. The method of determining the distance between adjacent columns can be the same as the method of determining the distance between the second convex portions, which will be described later. Further, the distance between the columns is preferably the same as the distance between the second convex portions. Further, it is preferable that the pattern of the arrangement of the columns is the same as the pattern of the arrangement of the second convex portion.
- the center of one of the figures constituting the support column and the figure constituting the second convex portion may overlap with the other figure. preferable.
- the center of the figure constituting the support is arranged at a position where the center of the figure overlaps with the second convex portion, and the figure constituting the second convex portion. It is preferable that the center of the structure overlaps with the support column. Further, it is preferable that the center of the figure forming the support column and the center of the figure forming the second convex portion coincide with each other. In FIG.
- the center C 1 of the figure constituting the support column 40 and the center C 2 of the figure constituting the second convex portion 62 coincide with each other.
- the center C 1 of the figure constituting the support column 40 and the center C 2 of the figure constituting the second convex portion 62 do not match, but the center C 1 of the figure constituting the support column 40 is the second convex portion. It overlaps with 62, and the center C 2 of the figure constituting the second convex portion 62 overlaps with the support column 40.
- the center of gravity of each figure can be used as the center of the figure constituting the support column and the second convex portion.
- the area of the cross section perpendicular to the height direction of the second convex portion is preferably 0.2 mm 2 or more and 4 mm 2 or less. Further, the area of the cross section perpendicular to the height direction of the column is preferably 0.15 mm 2 or more and 4 mm 2 or less.
- the support column does not overlap with the first convex portion in a plan view from the direction in which the first sheet and the second sheet face each other.
- the first convex portion and the second convex portion have the same height.
- the height of the convex portion is a height starting from a point on the inner wall surface of the first sheet 11 where the convex portion is not provided.
- the shape of the cross section of the first convex portion and the second convex portion perpendicular to the height direction is not particularly limited, and may be a circle or a polygon (triangle, quadrangle (rectangle, square), pentagon, hexagon). You may.
- the cross-sectional shapes of the first convex portion and the second convex portion may be the same or different.
- FIG. 2 shows that the cross-sectional shape of the first convex portion 61 is square, the cross-sectional shape of the second convex portion 62 is circular, and the second convex portion 62 is larger than the first convex portion 61.
- the area of the cross section perpendicular to the height direction of the second convex portion is larger than the area of the cross section perpendicular to the height direction of the first convex portion.
- the ratio of the area of the cross section perpendicular to the height direction of the second convex portion to the area of the cross section perpendicular to the height direction of the first convex portion is preferably 20 times or more and 200 times or less.
- the second convex portion is preferably large to some extent in order to secure the joint strength with the wick and the support column, but if the first convex portion is also large, the space for the hydraulic fluid to flow is insufficient, so that the first convex portion is preferably small to some extent. From such a viewpoint, the ratio of the area of the second convex portion to the area of the first convex portion may be determined.
- the area of the cross section perpendicular to the height direction of the first convex portion is preferably 0.0025 mm 2 or more and 0.04 mm 2 or less.
- the distance between the second convex portions is preferably larger than the distance between the first convex portions.
- the distance between the second convex portions is the distance between the adjacent second convex portions, and the distance between the first convex portions is the distance between the adjacent first convex portions.
- the distance W1 between the first convex portions 61 and the distance W2 between the second convex portions 62 are indicated by double-headed arrows.
- the distance between the adjacent first convex portions is defined as the distance between the centers of the figures constituting the first convex portions.
- the distance between the adjacent second convex portions is also determined as the distance between the centers of the figures constituting the second convex portion.
- the ratio of the distance between the second convex portions to the distance between the first convex portions is preferably 5 times or more and 50 times or less the distance between the first convex portions. Further, the distance between the second convex portions is preferably 1 mm or more and 5 mm or less. The distance between the first convex portions is preferably 0.05 mm or more and 0.3 mm or less.
- the shape of the housing is not particularly limited.
- the top view shape of the housing includes polygons such as triangles and rectangles, circles, ellipses, and combinations thereof.
- the first sheet and the second sheet constituting the housing may be overlapped so that the ends coincide with each other, or the ends may be offset and overlapped.
- the materials constituting the first sheet and the second sheet are not particularly limited as long as they have characteristics suitable for use as a vapor chamber, such as thermal conductivity, strength, and flexibility. ..
- the material constituting the first sheet and the second sheet is preferably a metal material, and examples thereof include copper, nickel, aluminum, magnesium, titanium, iron, and the like, or alloys containing them as main components.
- the material constituting the first sheet and the second sheet is particularly preferably copper.
- the material constituting the first sheet and the material constituting the second sheet may be different.
- the stress applied to the housing can be dispersed.
- different materials for both one sheet can obtain one function and the other sheet can obtain another function.
- the above-mentioned functions are not particularly limited, and examples thereof include a heat conduction function and an electromagnetic wave shielding function.
- the thicknesses of the first sheet and the second sheet are not particularly limited, but if the first sheet and the second sheet are too thin, the strength of the housing is lowered and deformation is likely to occur. Therefore, the thickness of the first sheet and the second sheet is preferably 20 ⁇ m or more, and more preferably 30 ⁇ m or more. On the other hand, if the first sheet and the second sheet are too thick, it becomes difficult to reduce the thickness of the entire vapor chamber. Therefore, the thicknesses of the first sheet and the second sheet are preferably 150 ⁇ m or less, more preferably 100 ⁇ m or less, and further preferably 50 ⁇ m or less. The thicknesses of the first sheet and the second sheet may be the same or different.
- the thickness of the first sheet is the thickness of the portion not in contact with the convex portion.
- the thickness of the second sheet is the thickness of the portion not in contact with the support column.
- the thickness of the first sheet may be constant, or a thick portion and a thin portion may be present.
- the thickness of the second sheet may be constant, or there may be a thick portion and a thin portion.
- the second sheet of the portion not in contact with the support column may be recessed inside the housing.
- the working fluid is not particularly limited as long as it can cause a gas-liquid phase change in the environment inside the housing, and for example, water, alcohols, CFC substitutes and the like can be used. ..
- the hydraulic fluid may be water.
- a compound having a boiling point lower than that of water can be used as the hydraulic fluid.
- a compound having a boiling point of less than 100 ° C. can be used as the hydraulic fluid, and a compound having a boiling point of 50 ° C. or higher and 80 ° C. or lower can be preferably used as the hydraulic fluid.
- specific compounds for example, alcohols, CFC substitutes and the like can be used.
- the wick is not particularly limited as long as it has a capillary structure capable of moving the hydraulic fluid by capillary force.
- the capillary structure of the wick may be a known structure used in a conventional vapor chamber.
- Examples of the capillary structure include microstructures such as pores, grooves, and protrusions, such as a porous structure, a fiber structure, a groove structure, and a mesh structure.
- the material of the wick is not particularly limited, and for example, a metal porous film formed by etching or metal processing, a mesh, a non-woven fabric, a sintered body, a porous body, or the like is used.
- the mesh used as the material of the wick may be composed of, for example, a metal mesh, a resin mesh, or a surface-coated mesh thereof, and is preferably composed of a copper mesh, a stainless (SUS) mesh, or a polyester mesh. ..
- the sintered body used as the material of the wick may be composed of, for example, a metal porous sintered body and a ceramic porous sintered body, and is preferably composed of a copper or nickel porous sintered body.
- the porous body used as the material of the wick may be, for example, a porous body made of a metal porous body, a ceramic porous body, a resin porous body, or the like.
- the wick is preferably a material that can be bonded to the second convex portion and the support column by diffusion bonding. It is preferably a metal material, and examples thereof include copper, nickel, aluminum, magnesium, titanium, iron and the like, alloys containing them as main components, porous sintered bodies and the like.
- the wick may be made of the same material as the second protrusion and the strut.
- the wick is continuously provided inside the housing from the evaporation part to the condensation part. At least part of the wick may be integral with the housing.
- the vapor chamber of the present invention may have a notch portion in which a part of the wick is notched. Since a part of the wick has a notched portion, the volume of the internal space (the volume of the part of the internal space where the gas phase can exist) can be increased, so that the heat transport amount of the vapor chamber can be increased. It can be made larger. If a part of the wick is cut out, the vapor chamber tends to swell in the vicinity of the cutout portion when the internal pressure in the housing becomes high.
- FIG. 5 is a cross-sectional top view schematically showing an example of another structure of the vapor chamber
- FIG. 6 is a cross-sectional view taken along the line BB of FIG.
- FIG. 5 shows a top view from the second sheet 12 side constituting the vapor chamber 2, through which the second sheet 12 is transmitted, and the support column 40, the wick 30, and the convex portion 60 (the first convex portion 61 and the convex portion 60) are shown.
- the arrangement of the second convex portion 62) is shown.
- a support column 40 and a second convex portion 62 are provided at a portion in contact with the cutout portion 31.
- the cutout portion 31 is not provided with the second convex portion 62, the first convex portion 61, or the support column 40.
- the vapor chamber of the present invention is not limited to the above embodiment, and various applications and modifications can be added within the scope of the present invention regarding the configuration of the vapor chamber, manufacturing conditions, and the like.
- the vapor chamber of the present invention can be mounted on an electronic device for the purpose of heat dissipation. Therefore, the electronic device provided with the vapor chamber of the present invention is also one of the present inventions. Examples of the electronic device of the present invention include smartphones, tablet terminals, notebook computers, game devices, wearable devices and the like. As described above, the vapor chamber of the present invention operates independently without the need for external power, and can diffuse heat in two dimensions at high speed by utilizing the latent heat of vaporization and the latent heat of condensation of the working liquid. Therefore, the electronic device provided with the vapor chamber of the present invention can effectively dissipate heat in the limited space inside the electronic device.
- the method for producing the vapor chamber of the present invention is not particularly limited as long as the above configuration can be obtained.
- a first sheet in which the first convex portion and the second convex portion are arranged is prepared, a wick is arranged on the first convex portion and the second convex portion, and the wick is arranged and overlapped with the second sheet in which the support is arranged.
- a vapor chamber can be obtained by injecting a hydraulic fluid and joining the first sheet and the second sheet.
- the method of joining the first sheet and the second sheet is not particularly limited, but for example, laser welding, resistance welding, diffusion welding, brazing, TIG welding (tungsten-inert gas welding), ultrasonic bonding, resin encapsulation, etc. Can be mentioned.
- first sheet and the second sheet are sealed by being joined to each other at a sealing portion at the outer edge. Further, the heat generated at the time of joining the first sheet and the second sheet joins the second convex portion and the wick, and joins the wick and the support column.
- a pressure jig and a heating jig for advancing diffusion bonding are brought into contact with the portion corresponding to the back side of the second convex portion of the first sheet and the portion corresponding to the back side of the support column of the second sheet to pressurize and pressurize. It is preferable to perform heating. In this way, it is preferable to cause a diffusion bond between the second convex portion and the wick, and to generate a diffusion bond between the wick and the column.
- the first sheet and the second sheet are joined by aligning the positions of the first sheet and the second sheet so that the positions of the second convex portion and the support column overlap. If the alignment mark that serves as a reference for alignment is provided on the first sheet and the second sheet, and the marks are aligned and joined, the positions of the second convex portion and the column can be overlapped. good.
- Example 1 A copper foil having a plan view dimension of 60 mm in width ⁇ 100 mm in length and 0.08 mm in thickness was prepared as the first sheet.
- a first convex portion having a prismatic shape and a second convex portion having a cylindrical shape were formed on the inner wall surface of the first sheet.
- the area of the cross section perpendicular to the height direction of the first convex portion was 0.01 mm 2 .
- the distance between the adjacent first convex portions was set to 0.1 mm.
- the area of the cross section perpendicular to the height direction of the second convex portion was set to 0.3 mm 2 . Further, the distance between the adjacent second convex portions was set to 3 mm.
- the heights of the first convex portion and the second convex portion from the inner wall surface of the first sheet were the same.
- a copper foil having a plan view dimension of 60 mm in width ⁇ 100 mm in length and 0.2 mm in thickness was prepared as the second sheet.
- a columnar column was formed on the inner wall surface.
- the area of the cross section perpendicular to the height direction of the column was 0.3 mm 2 .
- the distance between adjacent columns was set to 3 mm.
- the wick By arranging the wick so as to be sandwiched between the first sheet on which the convex portion is formed and the second sheet on which the support is formed, and by laser welding the outer edge portion of the first sheet and the outer edge portion of the second sheet. Sealed.
- a porous metal body was used as the wick.
- the position of the second convex portion and the position of the support column overlap, specifically, in a plan view from the direction in which the first sheet and the second sheet face each other.
- the alignment was performed so that 90% or more of the area of the above overlaps with the second convex portion.
- Example 1 After welding, methanol with a boiling point of 65 ° C was injected as a hydraulic fluid through a pipe. From the above, the vapor chamber of Example 1 was obtained.
- Example 2 By adjusting the alignment when the first sheet and the second sheet are overlapped, the ratio of the area of the column overlapping with the second convex portion in the plan view from the direction in which the first sheet and the second sheet face each other is shown in Table 1. It was changed as shown in. A vapor chamber was obtained in the same manner as in Example 1.
- Example 1 The pattern for etching the first sheet was changed to form only the convex portion having the same size as the first convex portion in Example 1. That is, the second convex portion was not provided.
- the alignment is not particularly conscious, and the support column overlaps with some of the first convex portions in a plan view from the direction in which the first sheet and the second sheet face each other. I did it.
- a vapor chamber was obtained in the same manner as in Example 1.
- the vapor chambers obtained in each Example and Comparative Example were placed in a constant temperature bath, and the appearance of the vapor chamber was observed while raising the temperature of the constant temperature bath at a heating rate of 5 ° C./min.
- the temperature of the heat source when the vapor chamber swelled was recorded as the swelling start temperature. It can be said that the higher the swelling start temperature, the less likely the swelling is to occur in the vapor chamber.
- the vapor chamber can be prevented from swelling by providing the second convex portion on the first sheet, providing the support column on the second sheet, and arranging the support column and the second convex portion at the overlapping positions. Further, it was found that the swelling can be prevented more effectively by increasing the area of the overlap between the support column and the second convex portion.
- FIG. 7 is a photograph showing the appearance of the peeled surface of Comparative Example 1.
- the above photograph is a photograph of the peeled surface viewed toward the convex side, and the convex portion existing under the peeled wick can be seen.
- the photo below is a view of the peeled surface toward the pillar side, and the peeled wick and the pillar behind the wick can be seen.
- Comparative Example 1 in which the second convex portion was not provided, a part of the wick adhered in a shape along the cross-sectional shape of the column, and a fracture mode was generated in which the wick was separated between the convex portion and the wick.
- FIG. 8 is a photograph showing the appearance of the peeled surface of Example 1.
- the upper photograph is a photograph of the peeled surface viewed toward the convex portion side, and the second convex portion and the wick can be seen.
- the photo below is a photo of the peeled surface viewed toward the pillar side, and the peeled wick and the pillar can be seen.
- the second convex portion is provided, most of the wick remains attached to the second convex portion, and a fracture mode is generated in which the wick and the column are separated from each other. Since the second convex portion has a large area, it is strongly joined to the wick. Therefore, it means that the wick is less likely to be peeled off from the convex portion and the fracture mode as in Comparative Example 1 is less likely to occur.
- the vapor chamber of the present invention can be used for a wide range of applications in the field of portable information terminals and the like. For example, it can be used to lower the temperature of a heat source such as a CPU and extend the usage time of an electronic device, and can be used for a smartphone, a tablet terminal, a notebook PC, or the like.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
Description
この筐体には、凸部、ウィック及び柱が重ねられており、これらは拡散接合等によりその接点が緩く接合されている。このような構造であると薄型構造において最大熱輸送量を大きくすることができる。
この影響は、ベーパーチャンバーの性能をさらに向上させるために沸点の低い作動液を使用する場合に顕著になる。
しかしながら、本発明は、以下の構成に限定されるものではなく、本発明の要旨を変更しない範囲において適宜変更して適用することができる。なお、以下において記載する本発明の個々の望ましい構成を2つ以上組み合わせたものもまた本発明である。
図1に示すベーパーチャンバー1は、対向する第1シート11及び第2シート12から構成され、第1シート11の内壁面11aと第2シート12の内壁面12aとの間に内部空間13を有する筐体10と、筐体10の内部空間13に封入された作動液20と、第1シート11の内壁面11aに間隔を空けて配置された複数の凸部60と、第2シート12の内壁面12aに間隔を空けて配置された複数の支柱40と、支柱40と凸部60との間に設けられたウィック30とを備えている。ウィック30は、第1シート11の内壁面11a及び第2シート12の内壁面12aの方向に沿って配置されている。
発熱部材70の熱により、発熱部材70の直上において液相の作動液20が気化し、発熱部材70の熱を奪うとともに気化した作動液はウィック30から支柱40の間の内部空間13に移動する。
気化した作動液20は筐体10内を移動して、筐体10の外縁付近で凝縮して液相となる。
液相となった作動液20はウィック30の有する毛細管力によりウィック30に吸収され、ウィック30内を再度発熱部材70の方に移動して、発熱部材70の熱を奪うように働く。
作動液が筐体内をこのように循環して移動することにより、ベーパーチャンバーによる発熱部材の冷却が行われる。
なお、発熱部材70は、第2シート12の第1シート11に対向しない主面(外壁面)に配置されてもよい。
図2には、ベーパーチャンバー1を構成する第2シート12側からの上面図を示しており、第2シート12及びウィック30を透過させて凸部60の配置を示している。
なお、図1は、図2に示すA-A断面でベーパーチャンバー1を切断して示した断面図であるともいえる。
支柱が、その面積が大きい第2凸部と重なる位置に配置されることによって、支柱、ウィック及び第2凸部が強く接合される。そのため、凸部(第2凸部)とウィックの間の接合強度が強くなるため、筐体内の内圧が高くなった場合にベーパーチャンバーが膨らむことを防止することができる。
具体的には、作動液の沸点を超えた温度でベーパーチャンバーを使用した場合においても、ベーパーチャンバーが膨らむことを防止することができる。従って、沸点の低い作動液を使用する場合にも好適である。
図3は、支柱と第2凸部の位置の重なりの一例を模式的に示す上面図である。
この上面図は、第1シート及び第2シートが対向する方向から平面視した図面である。
当該平面視において、支柱40は第2凸部62と重なる位置に配置される。すなわち、支柱40が断面形状の大きい第2凸部62と重なる。
図3には、支柱40の全てが第2凸部62と重なっている形態を示している。すなわち、支柱の面積の100%が第2凸部62と重なっている。
ベーパーチャンバーにおいて、支柱が第2凸部と重なる面積の割合は特に限定されるものではないが、支柱の面積の75%以上が第2凸部と重なることが好ましい。
支柱の面積の75%を第2凸部と重ねることにより、支柱の大部分が第2凸部と強く接合され、凸部とウィックの間の接合強度がより強くなる。
図3には支柱40の全てが第2凸部62と重なっている例を示したが、図4には、支柱40の一部が第2凸部62と重なっている例を示している。
ベーパーチャンバーにおいて、第2凸部の高さ方向に垂直な断面の面積は、支柱の高さ方向に垂直な断面の面積よりも大きいことが好ましい。図3に示す例、図4に示す例のいずれも、第2凸部62の高さ方向に垂直な断面の面積は、支柱40の高さ方向に垂直な断面の面積よりも大きくなっている。
第2凸部の高さ方向に垂直な断面の面積を支柱の高さ方向に垂直な断面の面積より大きくすることにより、第2凸部と支柱の位置の位置ずれが生じたとしてもその位置ずれが許容されやすくなる。
また、支柱の高さ方向に垂直な断面の面積に対する、第2凸部の高さ方向に垂直な断面の面積の割合は、100%以上、130%以下であることが好ましい。
支柱と第2凸部の断面形状は同じであっても異なってもよいが、支柱と第2凸部の断面形状が相似形であることが好ましい。また、支柱と第2凸部の断面形状が同一(合同)であってもよい。
図3及び図4には、支柱と第2凸部の形状が共に円形であることを示している。
また、隣接する支柱同士の間隔は、1mm以上、5mm以下であることが好ましい。隣接する支柱同士の間隔は、隣り合う支柱同士の間隔である。隣接する支柱同士の間隔の定め方は、後述する第2凸部同士の間隔の定め方と同様にすることができる。
また、支柱同士の間隔は、第2凸部同士の間隔と同じであることが好ましい。
また、支柱の配置のパターンは第2凸部の配置のパターンと同じであることが好ましい。
図3では、支柱40を構成する図形の中心C1と第2凸部62を構成する図形の中心C2が一致している。図4では、支柱40を構成する図形の中心C1と第2凸部62を構成する図形の中心C2が一致していないが、支柱40を構成する図形の中心C1は第2凸部62と重なっており、第2凸部62を構成する図形の中心C2は支柱40と重なっている。
支柱及び第2凸部を構成する図形の中心としては、各図形の重心を利用することができる。
第1凸部と第2凸部は同じ高さであることが好ましい。本明細書において凸部の高さは、第1シート11の内壁面の、凸部が設けられていない地点を起点とした高さである。
第1凸部と第2凸部の、高さ方向に垂直な断面の形状は特に限定されるものではなく、円形、多角形(三角形、四角形(長方形、正方形)、五角形、六角形)であってもよい。
第1凸部と第2凸部の断面形状は同じであっても異なってもよい。図2には、第1凸部61の断面形状が正方形、第2凸部62の断面形状が円形で、第2凸部62が第1凸部61より大きいことを示している。
第2凸部はウィック及び支柱との接合強度を確保するためにある程度大きいほうが好ましいが、第1凸部も大きいと作動液が流れるスペースが不足するため、第1凸部がある程度小さいほうが好ましい。そのような観点から第1凸部の面積に対する第2凸部の面積の割合を定めればよい。
図2には、第1凸部61同士の間隔W1と第2凸部62同士の間隔W2をそれぞれ両矢印で示している。隣り合う第1凸部同士の間隔は、第1凸部を構成する図形の中心の間の距離として定める。隣り合う第2凸部同士の間隔も、同様に、第2凸部を構成する図形の中心の間の距離として定める。
また、第2凸部同士の間隔は、1mm以上、5mm以下であることが好ましい。第1凸部同士の間隔は、0.05mm以上、0.3mm以下であることが好ましい。
なお、凸部が第1シートと一体である場合、第1シートの厚みは、凸部に接していない部分の厚みとする。また、支柱が第2シートと一体である場合、第2シートの厚みは、支柱に接していない部分の厚みとする。
また、本発明のベーパーチャンバーの構成であると、作動液として水よりも沸点が低い化合物を使用することができる。沸点が100℃未満の化合物を作動液として使用することができ、好ましくは沸点が50℃以上、80℃以下の化合物を作動液として使用することができる。具体的な化合物としては、例えばアルコール類、代替フロン等を使用することができる。
また、ウィックは、第2凸部及び支柱と拡散接合により接合可能な材料であることが好ましい。好ましくは金属材料であり、例えば、銅、ニッケル、アルミニウム、マグネシウム、チタン、鉄など、またはそれらを主成分とする合金、多孔質焼結体などが挙げられる。ウィックは、第2凸部及び支柱と同じ材料であってもよい。
ウィックの一部が切り欠かれていると、筐体内の内圧が高くなったときに、切り欠き部の近傍でベーパーチャンバーが膨れやすくなる。ここで、切り欠き部に接する部位に、支柱と第2凸部とを設けることが好ましい。切り欠き部に接する部位に支柱と第2凸部を設けることによって、切り欠き部の近傍でベーパーチャンバーが膨れることを防止することができる。
図5には、ベーパーチャンバー2を構成する第2シート12側からの上面図を示しており、第2シート12を透過させて、支柱40、ウィック30及び凸部60(第1凸部61及び第2凸部62)の配置を示している。
図5及び図6に示すベーパーチャンバー2では、ウィック30の一部が切り欠かれた切り欠き部31が存在する。
切り欠き部31に接する部位には支柱40と第2凸部62が設けられる。切り欠き部31には第2凸部62、第1凸部61及び支柱40はいずれも設けられていない。
第1シート及び第2シートの接合方法は、特に限定されないが、例えば、レーザー溶接、抵抗溶接、拡散接合、ロウ接、TIG溶接(タングステン-不活性ガス溶接)、超音波接合、樹脂封止などが挙げられる。これらのなかでは、レーザー溶接、ロウ接又は拡散接合が好ましい。
第1シート及び第2シートの接合の際に、第1シート及び第2シートは、外縁において封止部で互いに接合されることにより封止される。
また、第1シート及び第2シートの接合の際に生じる熱によって、第2凸部とウィックが接合され、ウィックと支柱が接合される。
第2凸部と支柱の位置が重なるように、第1シートと第2シートの位置を合わせて第1シートと第2シートの接合を行う。位置合わせをするための基準となる位置合わせ用マークを第1シートと第2シートに設けておき、当該マークの位置を合わせて接合すれば第2凸部と支柱の位置が重なるようにすればよい。
平面視寸法が幅60mm×長さ100mm、厚さ0.08mmの銅箔を第1シートとして準備した。第1シートを過硫酸ソーダでエッチングすることにより、四角柱形状の第1凸部及び円柱形状の第2凸部を第1シートの内壁面に形成した。
第1凸部の高さ方向に垂直な断面の面積は0.01mm2とした。また、隣接する第1凸部同士の間隔は、0.1mmとした。
第2凸部の高さ方向に垂直な断面の面積は0.3mm2とした。また、隣接する第2凸部同士の間隔は、3mmとした。
第1シートの内壁面からの第1凸部と第2凸部の高さは同じとした。
支柱の高さ方向に垂直な断面の面積は0.3mm2とした。また、隣接する支柱同士の間隔は、3mmとした。
第1シートと第2シートを重ねる際の位置合わせを調整して、第1シート及び第2シートが対向する方向からの平面視において、支柱の面積が第2凸部と重なる割合をそれぞれ表1に示すように変化させた。その他は実施例1と同様にしてベーパーチャンバーを得た。
第1シートをエッチングする際のパターンを変更して、凸部として実施例1における第1凸部と同じ大きさの凸部のみを形成した。すなわち、第2凸部を設けなかった。
第1シートと第2シートを重ねる際には、特に位置合わせを意識して行わず、第1シート及び第2シートが対向する方向からの平面視において、支柱が第1凸部のいくつかと重なるようにした。その他は実施例1と同様にしてベーパーチャンバーを得た。
また、支柱と第2凸部の重なりの面積を大きくすることにより膨らみをより効果的に防止できることが分かった。
図7は、比較例1の剥離面の外観を示す写真である。上の写真は剥離面を凸部側に向かって見た写真であり、剥離したウィックの下に存在していた凸部が見えている。下の写真は剥離面を支柱側に向かって見た写真であり、剥離したウィックとウィックの背後の支柱が見えている。
第2凸部を設けていない比較例1では、ウィックの一部が支柱の断面形状に沿った形状で付着して、凸部とウィックの間で剥離する破壊モードが生じていた。
これは、隣接する支柱同士の間隔が、隣接する凸部同士の間隔より大きいために、第2シート側での変形が生じやすいこと、及び、凸部の面積が支柱よりも小さいことに起因して、ウィックのうち支柱と接合された部分が凸部から引き剥がされていることを意味する。
一方、第2凸部を設けている各実施例では、ウィックの大部分が第2凸部に付着したままとなっており、ウィックと支柱の間で剥離する破壊モードが生じていた。
第2凸部は面積が大きいためにウィックと強く接合する。そのため、ウィックが凸部から引き剥がされにくく、比較例1のような破壊モードが生じにくくなることを意味する。
10 筐体
11 第1シート
11a 第1シートの内壁面
12 第2シート
12a 第2シートの内壁面
13 内部空間
20 作動液
30 ウィック
31 切り欠き部
40 支柱
50 封止部
60 凸部
61 第1凸部
62 第2凸部
70 発熱部材
Claims (13)
- 外縁が接合された対向する第1シート及び第2シートから構成され、前記第1シートの内壁面と前記第2シートの内壁面との間に内部空間を有する筐体と、
前記筐体の内部空間に封入された作動液と、
前記第1シートの内壁面に間隔を空けて配置された複数の凸部と、
前記第2シートの内壁面に間隔を空けて配置された複数の支柱と、
前記支柱と前記凸部との間に配置されたウィックと、を備え、
前記凸部は、複数の第1凸部と、高さ方向に垂直な断面の面積が前記第1凸部よりも大きい複数の第2凸部と、を含み、
前記第1シート及び前記第2シートが対向する方向からの平面視において、前記支柱が前記第2凸部と重なる位置に配置されており、
前記支柱と前記ウィックが接合され、かつ、前記ウィックと前記第2凸部が接合されていることを特徴とするベーパーチャンバー。 - 前記第1シート及び前記第2シートが対向する方向からの平面視において、前記支柱の面積の75%以上が前記第2凸部と重なる請求項1に記載のベーパーチャンバー。
- 前記第2凸部の高さ方向に垂直な断面の面積は、前記支柱の高さ方向に垂直な断面の面積よりも大きい請求項1又は2に記載のベーパーチャンバー。
- 前記支柱の高さ方向に垂直な断面の面積に対する、前記第2凸部の高さ方向に垂直な断面の面積の割合は、100%以上、130%以下である請求項1~3のいずれかに記載のベーパーチャンバー。
- 前記第2凸部の高さ方向に垂直な断面の面積は、0.2mm2以上、4mm2以下である請求項1~4のいずれかに記載のベーパーチャンバー。
- 前記支柱の高さ方向に垂直な断面の面積は、0.15mm2以上、4mm2以下である請求項1~5のいずれかに記載のベーパーチャンバー。
- 前記第2凸部同士の間隔は、前記第1凸部同士の間隔よりも大きい請求項1~6のいずれかに記載のベーパーチャンバー。
- 前記第1凸部同士の間隔に対する、前記第2凸部同士の間隔の割合は、5倍以上、50倍以下である請求項1~7のいずれかに記載のベーパーチャンバー。
- 前記第2凸部同士の間隔は、1mm以上、5mm以下である請求項1~8のいずれかに記載のベーパーチャンバー。
- 前記第1凸部同士の間隔は、0.05mm以上、0.3mm以下である請求項1~9のいずれかに記載のベーパーチャンバー。
- 前記第1凸部の高さ方向に垂直な断面の面積に対する、前記第2凸部の高さ方向に垂直な断面の面積の割合は、20倍以上、200倍以下である請求項1~10のいずれかに記載のベーパーチャンバー。
- 前記第1凸部の高さ方向に垂直な断面の面積は、0.0025mm2以上、0.04mm2以下である請求項1~11のいずれかに記載のベーパーチャンバー。
- 請求項1~12のいずれかに記載のベーパーチャンバーを備えることを特徴とする電子機器。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202190000741.3U CN219736078U (zh) | 2020-09-18 | 2021-09-03 | 均热板和电子设备 |
JP2022517800A JP7173402B2 (ja) | 2020-09-18 | 2021-09-03 | ベーパーチャンバー |
US18/182,725 US20230217631A1 (en) | 2020-09-18 | 2023-03-13 | Vapor chamber |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020-157487 | 2020-09-18 | ||
JP2020157487 | 2020-09-18 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US18/182,725 Continuation US20230217631A1 (en) | 2020-09-18 | 2023-03-13 | Vapor chamber |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022059517A1 true WO2022059517A1 (ja) | 2022-03-24 |
Family
ID=80776972
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2021/032412 WO2022059517A1 (ja) | 2020-09-18 | 2021-09-03 | ベーパーチャンバー |
Country Status (4)
Country | Link |
---|---|
US (1) | US20230217631A1 (ja) |
JP (1) | JP7173402B2 (ja) |
CN (1) | CN219736078U (ja) |
WO (1) | WO2022059517A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4203636A4 (en) * | 2020-11-23 | 2024-02-28 | Samsung Electronics Co Ltd | HEAT DIFFUSION STRUCTURE AND ELECTRONIC DEVICE COMPRISING IT |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54108050A (en) * | 1978-02-13 | 1979-08-24 | Oki Electric Cable | Flat board type heat pipe |
JP2004309002A (ja) * | 2003-04-04 | 2004-11-04 | Hitachi Cable Ltd | プレート型ヒートパイプおよびその製造方法 |
US20120145357A1 (en) * | 2010-12-13 | 2012-06-14 | Electronics And Telecommunications Research Institute | Thin plate heat pipe |
JP2015092131A (ja) * | 2009-04-21 | 2015-05-14 | ユナ ティーアンドイー カンパニーリミテッドYouna T&E Co.,Ltd. | 太陽光モジュールの冷却装置 |
CN207881538U (zh) * | 2017-11-03 | 2018-09-18 | 中国科学院理化技术研究所 | 一种平板热管 |
KR20200056917A (ko) * | 2018-11-15 | 2020-05-25 | 주식회사 씨지아이 | 윅 장착형 무방향성 베이퍼 챔버 |
-
2021
- 2021-09-03 WO PCT/JP2021/032412 patent/WO2022059517A1/ja active Application Filing
- 2021-09-03 JP JP2022517800A patent/JP7173402B2/ja active Active
- 2021-09-03 CN CN202190000741.3U patent/CN219736078U/zh active Active
-
2023
- 2023-03-13 US US18/182,725 patent/US20230217631A1/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54108050A (en) * | 1978-02-13 | 1979-08-24 | Oki Electric Cable | Flat board type heat pipe |
JP2004309002A (ja) * | 2003-04-04 | 2004-11-04 | Hitachi Cable Ltd | プレート型ヒートパイプおよびその製造方法 |
JP2015092131A (ja) * | 2009-04-21 | 2015-05-14 | ユナ ティーアンドイー カンパニーリミテッドYouna T&E Co.,Ltd. | 太陽光モジュールの冷却装置 |
US20120145357A1 (en) * | 2010-12-13 | 2012-06-14 | Electronics And Telecommunications Research Institute | Thin plate heat pipe |
CN207881538U (zh) * | 2017-11-03 | 2018-09-18 | 中国科学院理化技术研究所 | 一种平板热管 |
KR20200056917A (ko) * | 2018-11-15 | 2020-05-25 | 주식회사 씨지아이 | 윅 장착형 무방향성 베이퍼 챔버 |
Also Published As
Publication number | Publication date |
---|---|
JP7173402B2 (ja) | 2022-11-16 |
JPWO2022059517A1 (ja) | 2022-03-24 |
CN219736078U (zh) | 2023-09-22 |
US20230217631A1 (en) | 2023-07-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10973151B2 (en) | Vapor chamber | |
JP6741142B2 (ja) | ベーパーチャンバー | |
WO2018199218A1 (ja) | ベーパーチャンバー | |
CN111712681B (zh) | 均热板 | |
CN211261893U (zh) | 均热板、散热设备以及电子设备 | |
US11359869B2 (en) | Vapor chamber | |
TWI701992B (zh) | 均溫板 | |
US11740029B2 (en) | Vapor chamber | |
JP2023014077A (ja) | ベーパーチャンバー、電子機器、及びベーパーチャンバーの製造方法 | |
WO2022059517A1 (ja) | ベーパーチャンバー | |
JP2023052355A (ja) | ベーパーチャンバ、ベーパーチャンバ用シートおよびベーパーチャンバの製造方法 | |
CN112771344B (zh) | 均热板 | |
WO2021157506A1 (ja) | ベーパーチャンバー | |
WO2023238626A1 (ja) | 熱拡散デバイス及び電子機器 | |
JP2021143809A (ja) | ベーパーチャンバー及び電子機器 | |
TW202334604A (zh) | 熱擴散裝置及電子機器 | |
TWI801739B (zh) | 均溫板及其製造方法 | |
TWM630119U (zh) | 散熱件 | |
JP2021158190A (ja) | 電子機器及びベーパーチャンバー | |
JP2021156517A (ja) | 放熱構造体及び電子機器 | |
WO2023238625A1 (ja) | 熱拡散デバイス及び電子機器 | |
WO2022107479A1 (ja) | 熱拡散デバイス | |
CN218888890U (zh) | 热扩散设备以及电子设备 | |
WO2024075631A1 (ja) | 熱拡散デバイス及び電子機器 | |
JP7120494B1 (ja) | 熱拡散デバイス |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ENP | Entry into the national phase |
Ref document number: 2022517800 Country of ref document: JP Kind code of ref document: A |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21869204 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202190000741.3 Country of ref document: CN |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 21869204 Country of ref document: EP Kind code of ref document: A1 |