WO2022168891A1 - ベーパーチャンバ用の本体シート、ベーパーチャンバおよび電子機器 - Google Patents
ベーパーチャンバ用の本体シート、ベーパーチャンバおよび電子機器 Download PDFInfo
- Publication number
- WO2022168891A1 WO2022168891A1 PCT/JP2022/004135 JP2022004135W WO2022168891A1 WO 2022168891 A1 WO2022168891 A1 WO 2022168891A1 JP 2022004135 W JP2022004135 W JP 2022004135W WO 2022168891 A1 WO2022168891 A1 WO 2022168891A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- body surface
- sheet
- wall
- wall surface
- opening
- Prior art date
Links
- 239000012530 fluid Substances 0.000 claims description 159
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 239000007788 liquid Substances 0.000 description 104
- 238000001704 evaporation Methods 0.000 description 76
- 230000008020 evaporation Effects 0.000 description 73
- 238000004891 communication Methods 0.000 description 67
- 238000005530 etching Methods 0.000 description 59
- 238000002347 injection Methods 0.000 description 54
- 239000007924 injection Substances 0.000 description 54
- 230000009471 action Effects 0.000 description 40
- 239000000243 solution Substances 0.000 description 33
- 238000000034 method Methods 0.000 description 31
- 238000009833 condensation Methods 0.000 description 29
- 230000005494 condensation Effects 0.000 description 29
- 238000004519 manufacturing process Methods 0.000 description 26
- 230000008569 process Effects 0.000 description 24
- 239000007769 metal material Substances 0.000 description 22
- 238000010586 diagram Methods 0.000 description 18
- 239000000463 material Substances 0.000 description 16
- 238000009792 diffusion process Methods 0.000 description 15
- 230000004048 modification Effects 0.000 description 15
- 238000012986 modification Methods 0.000 description 15
- 238000001816 cooling Methods 0.000 description 13
- 230000005855 radiation Effects 0.000 description 9
- 229910000881 Cu alloy Inorganic materials 0.000 description 8
- 230000017525 heat dissipation Effects 0.000 description 7
- 238000000059 patterning Methods 0.000 description 7
- 238000005304 joining Methods 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 230000000717 retained effect Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 4
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 description 4
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 4
- 238000000206 photolithography Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000005219 brazing Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- -1 etc. Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000009751 slip forming Methods 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004320 controlled atmosphere Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- UREBDLICKHMUKA-CXSFZGCWSA-N dexamethasone Chemical compound C1CC2=CC(=O)C=C[C@]2(C)[C@]2(F)[C@@H]1[C@@H]1C[C@@H](C)[C@@](C(=O)CO)(O)[C@@]1(C)C[C@@H]2O UREBDLICKHMUKA-CXSFZGCWSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0028—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for cooling heat generating elements, e.g. for cooling electronic components or electric devices
- F28D2021/0029—Heat sinks
Definitions
- the present invention relates to a body sheet for vapor chambers, vapor chambers and electronic devices.
- Electronic devices that generate heat are used in electronic equipment such as mobile terminals such as mobile terminals and tablet terminals. Examples of such electronic devices include central processing units (CPUs), light emitting diodes (LEDs) and power semiconductors. Such electronic devices are cooled by heat dissipation devices such as heat pipes (see, for example, Patent Documents 1 and 2).
- heat dissipation devices such as heat pipes (see, for example, Patent Documents 1 and 2).
- a heat dissipation device As a heat dissipation device, a vapor chamber that can be made thinner than a heat pipe is being developed. The vapor chamber efficiently cools the electronic device by absorbing the heat of the electronic device and diffusing it inside the enclosed working fluid.
- the working liquid (working fluid) in the vapor chamber receives heat from the electronic device at a portion (evaporation portion) close to the electronic device.
- the heated working fluid evaporates into working vapor.
- the working vapor diffuses away from the evaporator within a vapor channel section formed within the vapor chamber.
- the diffused working vapor is cooled and condensed into a working liquid.
- a liquid flow path is provided as a capillary structure (wick).
- the working fluid flows through the liquid flow path and is transported toward the evaporator.
- the working fluid transported to the evaporating section is again heated by the evaporating section and evaporated.
- the working fluid circulates in the vapor chamber while repeating phase changes, that is, evaporation and condensation, thereby diffusing the heat of the electronic device.
- the heat dissipation efficiency of the vapor chamber is enhanced.
- An object of the present invention is to provide a body sheet for a vapor chamber, a vapor chamber, and an electronic device that can improve cooling efficiency.
- a body sheet for a vapor chamber in which a working fluid is enclosed a first body surface; a second body surface provided opposite to the first body surface; a through space extending from the first body surface to the second body surface; a plurality of first grooves provided in the first main body surface and communicating with the through space, the plurality of first grooves extending in a first direction;
- the through space extends in a first direction in plan view, When viewed in a cross section perpendicular to the first direction, the through space has a first opening located on the first body surface and a second opening located on the second body surface.
- the through space includes a first spatial recess defining the first opening provided in the first body surface and a recess provided in the second body surface.
- the first spatial recess includes a pair of concavely curved first wall surfaces
- the second spatial recess includes a pair of concavely curved second wall surfaces
- the first wall surface and the second wall surface that correspond to each other are connected by a wall projection portion that projects toward the inside of the through space,
- the second spatial recess includes a flat surface that connects the second wall surface and the wall protrusion that correspond to each other. You may do so.
- the through space includes a first spatial recess defining the first opening provided in the first body surface and a recess provided in the second body surface.
- the first spatial recess includes a pair of concavely curved first wall surfaces
- the second spatial recess includes a pair of concavely curved second wall surfaces
- the first wall surface and the second wall surface that correspond to each other are connected by a wall projection portion that projects toward the inside of the through space
- the second spatial recess includes a convex surface that connects the second wall surface and the wall surface protrusion that correspond to each other, the convex surface includes a spatial convex portion extending in the first direction and protruding toward the second main body surface; You may do so.
- the convex surface includes a plurality of spatial convexities spaced apart from each other, You may do so.
- the through space When viewed in a cross section perpendicular to the first direction, the through space includes a first spatial recess defining the first opening provided in the first body surface and a recess provided in the second body surface. a second spatial recess defining the second opening, the second spatial recess communicating with the first spatial recess;
- the first spatial recess includes a pair of convexly curved first wall surfaces
- the second spatial recess includes a pair of concavely curved second wall surfaces, You may do so.
- the second opening extends from a region overlapping the first opening in plan view to the first groove on both sides of the first opening. It extends to the position where it overlaps in plan view, You may do so.
- a frame body portion formed in a frame shape in plan view and extending from the first body surface to the second body surface, the frame body portion defining the through space; a land portion provided inside the frame portion, the land portion extending in the first direction and extending from the first main body surface to the second main body surface;
- the first opening and the second opening are located between the frame and the land, the first groove is located on the first main body surface of the land,
- the second opening extends from a region overlapping the first opening in plan view to a position overlapping the first groove located in the land portion in plan view. and extends toward the outside of the frame from the first opening, You may do so.
- a body sheet for a vapor chamber in which a working fluid is enclosed a first body surface; a second body surface provided opposite to the first body surface; a through space extending from the first body surface to the second body surface;
- the through space extends in a first direction in plan view, When viewed in a cross section perpendicular to the first direction, the through space includes a first spatial recess provided on the first main body surface and a first spatial recess provided on the second main body surface.
- the first spatial recess includes a pair of first wall surfaces
- the second spatial recess includes a pair of second wall surfaces, one of the first wall surfaces of the first spatial recess and the corresponding second wall surface of the second spatial recess are connected by a first wall surface protrusion,
- the first wall projection protrudes toward the inside of the through space, the first wall surface protrusion is arranged to be displaced with respect to an intermediate position between the first body surface and the second body surface in the normal direction of the first body surface;
- the first wall surface of the first spatial recess located on the side opposite to the first wall protruding portion and the corresponding second wall surface of the second spatial recess are continuous from the first wall surface to the second wall surface.
- the through space has a first opening defined by the first spatial recess located on the first body surface and a second opening defined by the second spatial recess located on the second body surface. and The center of the first opening is displaced from the center of the second opening when viewed in a cross section perpendicular to the first direction, You may do so.
- a body sheet for a vapor chamber in which a working fluid is enclosed a first body surface; a second body surface provided opposite to the first body surface; a through space extending from the first body surface to the second body surface;
- the through space extends in a first direction in plan view, When viewed in a cross section perpendicular to the first direction, the through space includes a first spatial recess provided on the first main body surface and a first spatial recess provided on the second main body surface.
- the first spatial recess includes a pair of first wall surfaces
- the second spatial recess includes a pair of second wall surfaces, one of the first wall surfaces of the first spatial recess and the corresponding second wall surface of the second spatial recess are connected by a first wall surface protrusion
- the first wall projection protrudes toward the inside of the through space, the first wall surface protrusion is arranged to be displaced with respect to an intermediate position between the first body surface and the second body surface in the normal direction of the first body surface
- the through space has a first opening defined by the first spatial recess located on the first body surface and a second opening defined by the second spatial recess located on the second body surface. and a body sheet for a vapor chamber, wherein the center of the first opening is displaced from the center of the second opening when viewed in a cross section perpendicular to the first direction; I will provide a.
- a frame body portion formed in a frame shape in plan view; a land portion provided inside the frame body portion, the land portion extending in the first direction and defining the through space between the land portion and the frame body portion;
- the width of the land portion is w1
- the amount of deviation between the center of the first opening and the center of the second opening is 0.05 mm to (0.8 ⁇ w1) mm. You may do so.
- the body sheet for the vapor chamber according to the above-mentioned third solution, further comprising a plurality of first grooves provided in the first main body surface and communicating with the through space;
- the first wall projection is located closer to the first body surface than the intermediate position, You may do so.
- the first wall surface of the first spatial recess located on the side opposite to the first wall surface protrusion and the corresponding second wall surface of the second spatial recess are connected by a second wall surface protrusion,
- the second wall projection protrudes toward the inside of the through space,
- the second wall surface protrusion is arranged to be offset from an intermediate position between the first body surface and the second body surface in the normal direction, You may do so.
- the second wall projection is located closer to the first body surface than the intermediate position, You may do so.
- a body sheet for a vapor chamber in which a working fluid is enclosed a first body surface; a second body surface provided opposite to the first body surface; a through space extending from the first body surface to the second body surface;
- the through space extends in a first direction in plan view, When viewed in a cross section perpendicular to the first direction, the through space communicates with the first spatial recess provided on the first main body surface and the first spatial recess provided on the second main body surface.
- the second spatial recess includes a pair of second wall surfaces
- the third spatial recess includes a third wall surface, each of the second wall surfaces of the second spatial recesses and the corresponding third wall surface of the third spatial recesses are connected by third wall projections; a body sheet for a vapor chamber, wherein the third wall projection protrudes toward the second body surface; I will provide a.
- the first spatial recess includes a pair of first wall surfaces, one of the first wall surfaces of the first spatial recess and the corresponding second wall surface of the second spatial recess are connected by a first wall surface protrusion, The first wall projection protrudes toward the inside of the through space, The first wall surface protrusion is arranged to be displaced from an intermediate position between the first body surface and the second body surface in the normal direction of the first body surface. You may do so.
- the body sheet for the vapor chamber according to the above-mentioned fourth solution, further comprising a plurality of first grooves provided in the first main body surface and communicating with the through space;
- the first wall projection is located closer to the first body surface than the intermediate position, You may do so.
- the first wall surface of the first spatial recess located on the side opposite to the first wall surface protrusion and the corresponding second wall surface of the second spatial recess are connected by a second wall surface protrusion,
- the second wall projection protrudes toward the inside of the through space,
- the second wall surface protrusion is arranged to be offset from an intermediate position between the first body surface and the second body surface in the normal direction, You may do so.
- the second wall projection is located closer to the first body surface than the intermediate position, You may do so.
- the first wall surface of the first spatial recess located on the side opposite to the first wall protruding portion and the corresponding second wall surface of the second spatial recess are continuous from the first wall surface to the second wall surface. is formed concavely, You may do so.
- the through space has a first opening defined by the first spatial recess located on the first body surface and a second opening defined by the second spatial recess located on the second body surface. and The center of the first opening is displaced from the center of the second opening when viewed in a cross section perpendicular to the first direction, You may do so.
- a frame body portion formed in a frame shape in plan view; a land portion provided inside the frame body portion, the land portion extending in the first direction and defining the through space between the land portion and the frame body portion;
- the width of the land portion is w1
- the amount of deviation between the center of the first opening and the center of the second opening is 0.05 mm to (0.8 ⁇ w1) mm. You may do so.
- a body sheet for a vapor chamber a first body surface; a second body surface opposite to the first body surface; a through space penetrating the first body surface and the second body surface; a plurality of first grooves provided on the second main body surface and communicating with the through space
- the through space has a curved first wall surface located on the first body surface side and a curved second wall surface located on the second body surface side, the first wall surface and the second wall surface meet at a protrusion formed to protrude inside the through space; the protrusion is positioned closer to the second body surface than to an intermediate position between the first body surface and the second body surface;
- the first wall surface has a first wall surface end on the first body surface side, a main body sheet for a vapor chamber, wherein the first wall surface end portion is located inside the through-space from the projection portion in a plan view; I will provide a.
- the second wall surface has a second wall surface end on the second body surface side, Lp is the distance between the second wall end and the protrusion in the width direction of the through space, and Ls is the distance between the second wall end and the first wall end. 1.05 to 2 times the distance Lp, You may do so.
- the plurality of first grooves are arranged in parallel with each other, A row of protrusions is provided between the first grooves adjacent to each other, each of the projection rows has a plurality of projections,
- the second wall surface has a second wall surface end on the second body surface side, When the distance between the second wall end portion and the first wall end portion is Ls, the distance Ls is 1.1 times or more and 10 times or less than the width of the convex portion. You may do so.
- the present invention as a sixth solution, a first sheet; a second sheet; a body sheet for a vapor chamber according to each of the first to sixth solutions, interposed between the first sheet and the second sheet; I will provide a.
- a vapor chamber containing a working fluid a first sheet; a second sheet; a body sheet for a vapor chamber interposed between the first sheet and the second sheet;
- the body sheet is a first body surface; a second body surface opposite to the first body surface; a through space penetrating the first body surface and the second body surface; a plurality of first grooves provided on the second main body surface and communicating with the through space,
- the through space has a curved first wall surface located on the first body surface side and a curved second wall surface located on the second body surface side, the first wall surface and the second wall surface meet at a protrusion formed to protrude inside the through space; the protrusion is positioned closer to the second body surface than to an intermediate position between the first body surface and the second body surface;
- the first wall surface has a first wall surface end on the first body surface side, the vapor chamber, wherein the first wall surface end portion is positioned inside the through-space from the projection portion in a plan view;
- the second wall surface has a second wall surface end on the second body surface side, Lp is the distance between the second wall end and the protrusion in the width direction of the through space, and Ls is the distance between the second wall end and the first wall end. 1.05 to 2 times the distance Lp, You may do so.
- the plurality of first grooves are arranged in parallel with each other, A row of protrusions is provided between the first grooves adjacent to each other, each of the projection rows has a plurality of projections,
- the second wall surface has a second wall surface end on the second body surface side, When the distance between the second wall end portion and the first wall end portion is Ls, the distance Ls is 1.1 times or more and 10 times or less than the width of the convex portion. You may do so.
- the present invention as the eighth solution, a housing; an electronic device contained within the housing; an electronic device comprising a vapor chamber according to the sixth solution or the seventh solution in thermal contact with said electronic device, I will provide a.
- cooling efficiency can be improved.
- FIG. 1 is a schematic perspective view illustrating an electronic device according to a first embodiment of the invention.
- FIG. 2 is a top view showing the vapor chamber according to the first embodiment of the invention.
- 3 is a cross-sectional view taken along the line AA showing the vapor chamber of FIG. 2.
- FIG. 4 is a top view of the lower sheet of FIG. 3;
- FIG. 5 is a bottom view of the upper sheet of FIG. 3;
- FIG. 6 is a top view of the wick sheet of FIG. 3;
- FIG. 7 is a bottom view of the wick sheet of FIG. 3.
- FIG. 8A is a partially enlarged cross-sectional view of FIG. 3 showing a second steam passage;
- FIG. FIG. 8B is a partially enlarged cross-sectional view showing an example of an upper opening.
- FIG. 8A is a partially enlarged cross-sectional view of FIG. 3 showing a second steam passage;
- FIG. 8B is a partially enlarged cross-sectional view
- FIG. 8C is a partially enlarged cross-sectional view showing an example of the upper opening.
- FIG. 8D is a partially enlarged cross-sectional view showing an example of an upper opening.
- FIG. 8E is a partially enlarged cross-sectional view showing an example of an upper opening.
- FIG. 8F is a schematic diagram for explaining a flat surface.
- 9 is a partially enlarged top view of the liquid flow path shown in FIG. 7.
- FIG. 10 is a partially enlarged sectional view of FIG. 3 showing the first steam passage;
- FIG. 11 is a partially enlarged cross-sectional view showing a modification of the vapor chamber shown in FIG. 8A.
- FIG. 12 is a partially enlarged cross-sectional view showing a modification of the vapor chamber shown in FIG. 8A.
- FIG. 13 is a partially enlarged cross-sectional view showing a modification of the vapor chamber shown in FIG. 8A.
- FIG. 14 is a partially enlarged cross-sectional view showing a modification of the vapor chamber shown in FIG. 8A.
- 15A is a partially enlarged top view of FIG. 6, which is a modification of the wick sheet shown in FIG. 15B is a partially enlarged cross-sectional view showing the second steam passage in the second region shown in FIG. 15A.
- FIG. FIG. 16 is a cross-sectional view showing a vapor chamber according to a second embodiment of the present invention, and is a cross-sectional view corresponding to the AA line cross section of FIG. 17 is a partially enlarged sectional view of FIG. 16.
- FIG. 18 is a diagram for explaining a wick sheet preparation step in the vapor chamber manufacturing method according to the second embodiment.
- FIG. 19 is a diagram for explaining a resist forming step in the vapor chamber manufacturing method according to the second embodiment.
- FIG. 20 is a diagram for explaining a resist patterning step in the vapor chamber manufacturing method according to the second embodiment.
- FIG. 21 is a diagram for explaining an etching step in the vapor chamber manufacturing method according to the second embodiment.
- FIG. 22 is a diagram for explaining a resist removing step in the vapor chamber manufacturing method according to the second embodiment.
- 23A and 23B are diagrams for explaining a bonding step in the vapor chamber manufacturing method according to the second embodiment.
- 24 is a partially enlarged sectional view showing a modification of the vapor chamber shown in FIG. 17.
- FIG. 19 is a diagram for explaining a resist forming step in the vapor chamber manufacturing method according to the second embodiment.
- FIG. 20 is a diagram for explaining a resist patterning step in the
- FIG. 25 is a partially enlarged sectional view showing another modification of the vapor chamber shown in FIG. 17.
- FIG. 26 is a partially enlarged cross-sectional view showing a vapor chamber according to a third embodiment of the invention.
- FIG. 27 is a diagram for explaining a first resist forming step in the vapor chamber manufacturing method according to the third embodiment.
- FIG. 28 is a diagram for explaining the first patterning step of the first resist in the vapor chamber manufacturing method according to the third embodiment.
- FIG. 29 is a diagram for explaining the first etching step in the vapor chamber manufacturing method according to the third embodiment.
- FIG. 30 is a diagram for explaining the first resist removing step in the vapor chamber manufacturing method according to the third embodiment.
- FIG. 31 is a diagram for explaining a second resist forming step in the vapor chamber manufacturing method according to the third embodiment.
- FIG. 32 is a diagram for explaining the second patterning step of the second resist in the vapor chamber manufacturing method according to the third embodiment.
- FIG. 33 is a diagram for explaining the second etching step in the vapor chamber manufacturing method according to the third embodiment.
- FIG. 34 is a diagram for explaining the second resist removing step in the vapor chamber manufacturing method according to the third embodiment.
- 35 is a partially enlarged sectional view showing a modification of the vapor chamber shown in FIG. 26.
- FIG. FIG. 36 is a top view showing a vapor chamber according to a fourth embodiment of the invention; 37 is a cross-sectional view taken along line BB showing the vapor chamber of FIG. 36.
- FIG. 38 is a top view of the lower sheet of FIG. 37;
- FIG. 39 is a bottom view of the upper sheet of FIG. 37;
- FIG. 40 is a top view of the wick sheet of FIG. 37;
- FIG. 41 is a bottom view of the wick sheet of FIG. 37;
- FIG. 42 is a partially enlarged sectional view of FIG. 37.
- FIG. 43 is a partially enlarged top view of the liquid flow path shown in FIG. 40.
- FIG. 44A and 44B are diagrams for explaining a method of manufacturing the vapor chamber according to the fourth embodiment.
- 45A and 45B are diagrams for explaining a method of manufacturing the vapor chamber according to the fourth embodiment.
- 46A and 46B are diagrams for explaining a manufacturing method of the vapor chamber according to the fourth embodiment.
- FIG. 47 is a partially enlarged cross-sectional view showing the flow of the working fluid in the steam channel portion according to the fourth embodiment.
- Geometric conditions, physical properties, terms specifying the degree of geometric conditions or physical properties, numerical values indicating geometric conditions or physical properties, etc. used in this specification are strictly You can interpret without being bound by the meaning. These geometric conditions, physical characteristics, terms, numerical values, and the like may be interpreted to include the extent to which similar functions can be expected. Examples of terms specifying geometric conditions include “length”, “angle”, “shape” and “disposition”. Examples of terms specifying geometric conditions include “parallel,” “orthogonal,” and “identical.” Furthermore, to clarify the drawings, the shapes of parts that can be expected to have similar functions are described regularly. However, without being bound by a strict meaning, the shapes of the portions may differ from each other within the range in which the functions can be expected. In the drawings, the boundary lines indicating the joint surfaces of the members are shown as simple straight lines for convenience, but they are not bound to be strictly straight lines, and within the range where the desired joint performance can be expected, The shape of the boundary line is arbitrary.
- the vapor chamber 1 in the present embodiment is housed in a housing H of an electronic device E together with an electronic device D that generates heat, and is a device for cooling the electronic device D.
- the electronic device E include mobile terminals such as portable terminals and tablet terminals.
- Examples of electronic devices D include central processing units (CPUs), light emitting diodes (LEDs), power semiconductors, and the like.
- Electronic device D may also be referred to as a cooled device.
- the electronic equipment E includes a housing H, an electronic device D housed within the housing H, and a vapor chamber 1 .
- a touch panel display TD is provided on the front surface of the housing H.
- the vapor chamber 1 is housed within a housing H and placed in thermal contact with an electronic device D. As shown in FIG. The vapor chamber 1 receives heat generated by the electronic device D when the electronic equipment E is used.
- the electronic device D is effectively cooled.
- the electronic device D may be a central processing unit or the like.
- the vapor chamber 1 has a sealed space 3 filled with working fluids 2a and 2b.
- working fluids 2a and 2b include pure water, ethanol, methanol, acetone, etc., and mixtures thereof.
- the working fluids 2a and 2b may have freeze expandability. That is, the working fluids 2a and 2b may be fluids that expand when frozen. Examples of the working fluids 2a and 2b having freeze expandability include pure water and an aqueous solution obtained by adding an additive such as alcohol to pure water.
- the vapor chamber 1 includes a lower sheet 10, an upper sheet 20, a vapor chamber wick sheet 30, a vapor channel portion 50, and a liquid channel portion 60.
- the wick sheet 30 is interposed between the lower sheet 10 and the upper sheet 20. - ⁇ The wick sheet 30 for the vapor chamber is hereinafter simply referred to as the wick sheet 30 .
- a lower sheet 10, a wick sheet 30 and an upper sheet 20 are stacked in this order.
- the vapor chamber 1 is generally formed in the shape of a thin flat plate.
- the planar shape of the vapor chamber 1 is arbitrary, it may be rectangular as shown in FIG.
- the planar shape of the vapor chamber 1 may be, for example, a rectangle with one side of 1 cm and the other side of 3 cm, or a square with one side of 15 cm.
- the planar dimensions of the vapor chamber 1 are arbitrary.
- the planar shape of the vapor chamber 1 is a rectangular shape whose longitudinal direction is the X direction, which will be described later.
- the lower sheet 10, upper sheet 20 and wick sheet 30 may have the same planar shape as the vapor chamber 1, as shown in FIGS.
- the planar shape of the vapor chamber 1 is not limited to a rectangular shape, and may be any shape such as a circular shape, an elliptical shape, an L-shape, or a T-shape.
- the vapor chamber 1 has an evaporation area SR where the working fluids 2a and 2b evaporate and a condensation area CR where the working fluids 2a and 2b condense.
- the working vapor 2a is a gaseous working fluid
- the working liquid 2b is a liquid working fluid.
- the evaporation area SR is an area that overlaps with the electronic device D in plan view, and is an area where the electronic device D is attached.
- the evaporation area SR may be arranged anywhere in the vapor chamber 1 .
- an evaporation region SR is formed on one side (the left side in FIG. 2) of the vapor chamber 1 in the X direction. Heat from the electronic device D is transmitted to the evaporation region SR, and the working fluid 2b is evaporated in the evaporation region SR by this heat. Heat from the electronic device D can be transmitted not only to the area overlapping the electronic device D in plan view, but also to the periphery of the area.
- the evaporation region SR includes a region overlapping the electronic device D and a peripheral region thereof in plan view.
- the planar view may be a state in which the vapor chamber 1 is viewed from a direction orthogonal to the surface receiving heat from the electronic device D and the surface emitting the received heat.
- the surface that receives heat corresponds to a first lower sheet surface 10a of the lower sheet 10, which will be described later.
- the heat-releasing surface corresponds to a second upper sheet surface 20b of the upper sheet 20, which will be described later.
- the state of the vapor chamber 1 viewed from above or the state viewed from below corresponds to a plan view.
- the condensation area CR is an area that does not overlap with the electronic device D in plan view, and is an area where mainly the working vapor 2a of the working fluid releases heat and condenses.
- the condensation area CR may be the area surrounding the evaporation area SR. Heat from the working steam 2a is released to the upper sheet 20 in the condensation area CR, and the working steam 2a is cooled and condensed in the condensation area CR.
- the vapor chamber 1 when the vapor chamber 1 is installed inside a mobile terminal, the vertical relationship may be disrupted depending on the orientation of the mobile terminal.
- the sheet that receives heat from the electronic device D is referred to as the lower sheet 10 described above, and the sheet that releases the received heat is referred to as the upper sheet 20 described above. Therefore, the following description will be made with the lower sheet 10 arranged on the lower side and the upper sheet 20 arranged on the upper side.
- the lower sheet 10 is an example of the first sheet.
- the lower seat 10 has a first lower seat surface 10a provided opposite to the wick seat 30, a second lower seat surface 10b provided opposite to the first lower seat surface 10a, have.
- the second lower seat surface 10b is positioned on the wick seat 30 side.
- the second lower seat surface 10b is in contact with a first main body surface 30a of the wick sheet 30, which will be described later.
- alignment holes 12 may be provided at the four corners of the lower sheet 10 .
- the electronic device D described above may be attached to the first lower seat surface 10a.
- the upper sheet 20 is an example of a second sheet.
- the upper sheet 20 has a first upper sheet surface 20a provided on the side of the wick sheet 30 and a second upper sheet surface 20b provided on the side opposite to the first upper sheet surface 20a.
- the first upper sheet surface 20a is in contact with a second main body surface 30b of the wick sheet 30, which will be described later.
- alignment holes 22 may be provided at the four corners of the upper sheet 20 .
- a housing member Ha forming part of the housing H described above may be attached to the second upper seat surface 20b.
- the entire second upper seat surface 20b may be covered with the housing member Ha.
- the wick sheet 30 is an example of a body sheet.
- the wick sheet 30 has a first main body surface 30a and a second main body surface 30b provided opposite to the first main body surface 30a.
- the first body surface 30a is arranged on the side of the lower sheet 10, and the lower sheet 10 is provided on the first body surface 30a.
- the second body surface 30b is arranged on the side of the upper sheet 20, and the upper sheet 20 is provided on the second body surface 30b.
- the second lower sheet surface 10b of the lower sheet 10 and the first main body surface 30a of the wick sheet 30 may be permanently bonded to each other by diffusion bonding.
- the first upper sheet surface 20a of the upper sheet 20 and the second body surface 30b of the wick sheet 30 may be permanently bonded together by diffusion bonding.
- the lower sheet 10, the upper sheet 20 and the wick sheet 30 may be joined by other methods such as brazing instead of diffusion joining as long as they can be joined permanently.
- the term “permanently joined” is not limited to a strict meaning, and the lower sheet 10 and the wick sheet 30 are separated from each other to such an extent that the sealing of the sealed space 3 can be maintained during the operation of the vapor chamber 1 . It may be used as a term meaning that it is possible to maintain a bond with.
- the term "permanently bonded” may also be used to mean that the upper sheet 20 and the wick sheet 30 are bonded to the extent that the bonding can be maintained.
- the wick sheet 30 includes a frame body portion 32 formed in a rectangular frame shape in a plan view, and a plurality of A land portion 33 is provided.
- the frame portion 32 and each land portion 33 extend from the first body surface 30a to the second body surface 30b.
- the frame portion 32 and the land portion 33 are portions where the material of the wick sheet 30 remains without being etched in the etching process described later.
- the frame body portion 32 is formed in a rectangular frame shape in plan view.
- a steam channel portion 50 is defined inside the frame portion 32 . Inside the frame portion 32 , a steam flow path portion 50 is arranged around each land portion 33 .
- the working steam 2 a flows around each land portion 33 .
- the steam flow path portion 50 is defined between the frame portion 32 and the land portion 33 and between a pair of adjacent land portions 33 .
- the land portion 33 may extend in an elongated shape with the X direction as the longitudinal direction in plan view.
- the planar shape of the land portion 33 may be an elongated rectangular shape.
- the land portions 33 may be arranged parallel to each other with equal intervals in the Y direction.
- the working steam 2a flows around each land portion 33 and is transported toward the condensation area CR. This suppresses obstruction of the flow of the working steam 2a.
- the X direction is an example of the first direction and corresponds to the horizontal direction in FIG.
- the Y direction is an example of a second direction and corresponds to the vertical direction in FIG.
- the X direction is the longitudinal direction of the land portion 33, and the Y direction is the direction orthogonal to the X direction in plan view.
- a direction orthogonal to the X direction and the Y direction is defined as the Z direction.
- the width w1 (see FIG. 8A) of the land portion 33 may be, for example, 100 ⁇ m to 3000 ⁇ m.
- the width w1 of the land portion 33 is the dimension of the land portion 33 in the Y direction.
- the width w1 of the land portion 33 is the width between the tip of the first wall surface protrusion 57 that defines the land portion 33 and the tip of the second wall surface protrusion 58. in the Y direction.
- the frame body part 32 and each land part 33 are diffusion-bonded to the lower sheet 10 and are diffusion-bonded to the upper sheet 20 . This improves the mechanical strength of the vapor chamber 1 .
- Lower wall surfaces 53 a and 53 b of the lower steam flow channel recess 53 and upper wall surfaces 54 a and 54 b of the upper steam flow channel recess 54 which will be described later, form side walls of the land portion 33 .
- the first main body surface 30a and the second main body surface 30b of the wick sheet 30 may be formed flat over the frame portion 32 and each land portion 33 .
- the steam channel portion 50 is an example of a through space.
- the steam channel portion 50 may be provided on the first main body surface 30 a of the wick sheet 30 .
- the steam channel portion 50 may be a channel through which the working steam 2a mainly passes.
- the working liquid 2 b may also pass through the steam flow path portion 50 .
- the steam channel portion 50 extends from the first main body surface 30 a to the second main body surface 30 b and penetrates the wick sheet 30 .
- the steam channel portion 50 may be covered with the lower sheet 10 on the first main body surface 30a, and may be covered with the upper sheet 20 on the second main body surface 30b.
- the steam passage section 50 in this embodiment has a first steam passage 51 and a plurality of second steam passages 52 .
- the first steam passage 51 includes a portion extending in the X direction and a portion extending in the Y direction in plan view, and is formed between the frame portion 32 and the land portion 33 .
- the first steam passage 51 is formed continuously inside the frame portion 32 and outside the land portion 33 .
- the planar shape of the first steam passage 51 is a rectangular frame shape.
- the second steam passage 52 extends in the X direction in plan view, and is formed between adjacent land portions 33 .
- the planar shape of the second steam passage 52 is an elongated rectangular shape.
- the plurality of lands 33 partition the steam flow path section 50 into a first steam passage 51 and a plurality of second steam passages 52 .
- the first steam passage 51 and the second steam passage 52 extend from the first body surface 30a of the wick sheet 30 to the second body surface 30b.
- the first steam passage 51 and the second steam passage 52 each have a lower steam passage recess 53 , an upper steam passage recess 54 , a lower opening 55 and an upper opening 56 .
- the lower steam channel recessed portion 53 is an example of a first spatial recessed portion, and is provided in the first main body surface 30a.
- the upper steam channel recessed portion 54 is an example of a second spatial recessed portion, and is provided in the second main body surface 30b.
- the communication between the lower steam passage recess 53 and the upper steam passage recess 54 allows the first steam passage 51 and the second steam passage 52 of the steam passage portion 50 to move from the first main body surface 30a to the second main body surface 30a. It is formed so as to extend over 30b.
- the lower opening 55 is an example of a first opening and is located on the first main body surface 30a.
- the lower opening 55 is defined by the lower steam channel recess 53 in the first body surface 30a.
- the upper opening 56 is an example of a second opening and is located on the second main body surface 30b.
- the upper opening 56 is defined by the upper steam channel recess 54 in the second body surface 30b.
- the lower steam flow path concave portion 53 is formed in a concave shape on the first main body surface 30a of the wick sheet 30 by etching the first main body surface 30a of the wick sheet 30 in an etching process to be described later.
- the lower steam channel recess 53 has a pair of curved lower wall surfaces 53a and 53b, as shown in FIG. 8A.
- the lower wall surfaces 53a and 53b are an example of a first wall surface.
- the lower wall surface 53a is the left wall surface in FIG. 8A
- the lower wall surface 53b is the right wall surface in FIG. 8A.
- Lower wall surface 53a and lower wall surface 53b are formed to extend from lower opening 55 toward second main body surface 30b.
- the lower side walls 53a, 53b may be concavely curved. Each lower wall surface 53a, 53b defines a lower steam flow channel recessed portion 53, and in the cross section shown in FIG. may be Such a lower steam passage concave portion 53 constitutes part of the first steam passage 51 and part of the second steam passage 52 .
- the lower steam passage concave portion 53 may constitute the lower half of the first steam passage 51 and the lower half of the second steam passage 52 .
- the width w2 of the lower opening 55 may be, for example, 100 ⁇ m to 3000 ⁇ m.
- the width w2 of the lower opening 55 means the width dimension of the lower steam flow channel recess 53 on the first main body surface 30a.
- the width w2 corresponds to the Y-direction dimension of the portion of the first steam passage 51 extending in the X-direction, and also to the Y-direction dimension of the second steam passage 52 .
- the dimension in the Y direction between the lower wall surface 53a and the lower wall surface 53b of the lower steam flow channel recessed portion 53 gradually increases from the second main body surface 30b toward the first main body surface 30a. It is larger and is maximum at the first body surface 30a.
- the width w2 is the maximum value of the dimension in the Y direction between the lower wall surface 53a and the lower wall surface 53b.
- the dimension in the Y direction between the lower wall surface 53a and the lower wall surface 53b does not have to be maximized at the first main body surface 30a.
- the position where the dimension in the Y direction between the lower wall surface 53a and the lower wall surface 53b is maximum may be located closer to the second body surface 30b than to the first body surface 30a.
- the width w2 also corresponds to the X-direction dimension of the portion of the first steam passage 51 that extends in the Y-direction.
- the upper steam flow path concave portion 54 is formed in a concave shape on the second main body surface 30b by etching the wick sheet 30 from the second main body surface 30b in an etching process to be described later.
- the upper steam passage recess 54 has a pair of curved upper wall surfaces 54a and 54b, as shown in FIG. 8A.
- the upper wall surfaces 54a and 54b are an example of a second wall surface.
- the upper wall surface 54a is the left wall surface in FIG. 8A, and the upper wall surface 54b is the right wall surface in FIG. 8A.
- Upper wall surface 54a and upper wall surface 54b are formed to extend from upper opening 56 toward first body surface 30a.
- the upper wall surfaces 54a, 54b may be concavely curved.
- Each upper wall surface 54a, 54b defines an upper steam flow passage recess 54, and in the cross section shown in FIG. good.
- Such an upper steam passage concave portion 54 constitutes part of the first steam passage 51 and part of the second steam passage 52 .
- the upper steam passage recess 54 may constitute the upper half of the first steam passage 51 and the upper half of the second steam passage 52 .
- the width w3 of the upper opening 56 may be larger than the width w2 of the lower opening 55 described above. Width w3 may be, for example, between 160 ⁇ m and 5800 ⁇ m.
- the width w3 of the upper opening 56 means the width dimension of the upper steam passage recess 54 on the second main body surface 30b.
- the width w3 corresponds to the Y-direction dimension of the portion of the first steam passage 51 extending in the X direction and the Y-direction dimension of the second steam passage 52 .
- the dimension in the Y direction between the upper wall surface 54a and the upper wall surface 54b gradually increases from the first body surface 30a toward the second body surface 30b.
- the width w3 is the maximum dimension in the Y direction between the upper wall surface 54a and the upper wall surface 54b.
- the dimension in the Y direction between the upper wall surface 54a and the upper wall surface 54b does not have to be maximized at the second body surface 30b.
- the position where the dimension in the Y direction between the upper wall surface 54a and the upper wall surface 54b is maximum may be located closer to the first body surface 30a than to the second body surface 30b.
- the width w3 also corresponds to the X-direction dimension of the portion of the first steam passage 51 that extends in the Y-direction.
- the center 55a of the lower opening 55 may overlap the center 56a of the upper opening 56 in plan view.
- the center 55a of the lower opening 55 may be displaced from the center 56a of the upper opening 56 .
- the lower opening 55 may be defined by a pair of lower opening side edges 55b extending in the X direction.
- the lower opening side edge 55b is an example of a first opening side edge.
- the center 55a of the lower opening 55 described above may be the middle point of the pair of lower opening side edges 55b when viewed in a cross section perpendicular to the X direction.
- the lower opening edge 55b is shown as the intersection of the first body surface 30a and the lower wall surfaces 53a, 53b, and the midpoint of these intersections is the center 55a of the lower opening 55. may be
- the upper opening 56 may be defined by a pair of upper opening side edges 56b extending in the X direction.
- the upper opening side edge 56b is an example of a second opening side edge.
- the center 56a of the upper opening 56 described above may be the middle point of the pair of upper opening side edges 56b when viewed in a cross section perpendicular to the X direction.
- the upper opening side edge 56b is shown as the intersection of the second body surface 30b and the upper wall surfaces 54a, 54b, and the midpoint of these intersections is the center 56a of the upper opening 56. good too.
- the width w3 of the upper opening 56 may be larger than the width w2 of the lower opening 55.
- the upper opening 56 may extend from a region 56c that overlaps the lower opening 55 in plan view to a position that overlaps the main groove 61 described later in plan view.
- the channel cross-sectional area of the upper steam channel recess 54 can be made larger than that of the lower steam channel recess 53 .
- the intersection point where the straight line extending in the Z direction through the second wall surface protrusion 58 intersects the second lower seat surface 10b is defined as P1.
- a region defined by the intersection point P1, the lower opening side edge 55b, the lower wall surface 53b, and the second wall surface protrusion 58 is defined as a lower steam flow path partial region.
- P2 is the intersection point where the straight line extending in the Z direction through the second wall projection 58 intersects the first upper seat surface 20a.
- a region defined by the intersection point P2, the upper opening side edge 56b, the upper wall surface 54b, and the second wall surface projecting portion 58 is defined as an upper steam flow path partial region. Since the upper steam channel partial region has a channel cross-sectional area larger than that of the lower steam channel partial region, the capillary action of the upper steam channel partial region is equal to that of the lower steam channel partial region.
- the upper steam passage partial region can reduce the passage resistance of the working steam 2a in the upper steam passage partial region, and the working steam 2a can be easily diffused to improve the heat radiation efficiency.
- the area defined by the lower wall surface 53a and the upper wall surface 54a land portions 33 joined to the upper sheet 20 are formed between the upper opening portions 56 adjacent in the Y direction. This ensures the mechanical strength of the vapor chamber 1 . In this way, in the vapor chamber 1 according to the present embodiment, the limited space is effectively used, and the heat radiation efficiency is improved while securing the mechanical strength.
- a part of the upper opening 56 may overlap a part of the main groove 61 adjacent to the steam passages 51 and 52 in plan view.
- a portion of the upper opening 56 may overlap the plurality of main grooves 61 in plan view.
- the number of main grooves 61 with which the upper openings 56 overlap is arbitrary.
- the main groove 61 adjacent to the second steam passage 52 formed by one upper opening 56 is referred to as the main groove 61P
- the other main groove 61 adjacent to the main groove 61P is referred to as the main groove 61Q.
- the main groove 61Q is located farther from the center 55a of the lower opening 55 than the main groove 61P.
- the main groove 61Q is located farther from the center 56a of the upper opening 56 than the main groove 61P.
- the center 55a of the lower opening 55 overlaps the center 56a of the upper opening 56 in plan view. Below, the positional relationship between the upper opening 56 and the mainstream groove 61 will be described using the center 55 a of the lower opening 55 .
- the main grooves 61P and 61Q include a first main groove side edge 61a and a second main groove side edge 61b extending in the X direction. 8B-8E, the first main groove side edge 61a and the second main groove side edge 61b are shown as intersections between the first body surface 30a and a wall surface 62, which will be described later.
- the first main groove side edge 61a is located closer to the center 55a of the lower opening 55 than the second main groove side edge 61b
- the second main groove side edge 61b is located closer to the center 55a than the first main groove side edge 61a. It is positioned far from the center 55 a of the lower opening 55 .
- the upper opening 56 may extend in the Y direction to a position that partially overlaps the main groove 61P.
- the upper opening side edge 56b may be positioned closer to the center 55a of the lower opening 55 than the second main groove side edge 61b of the main groove 61P in plan view.
- the upper opening 56 may extend to a position where it overlaps the entire main groove 61P adjacent to the second steam passage 52 in the Y direction.
- the upper opening side edge 56b may be located at a position overlapping the second main groove side edge 61b of the main groove 61P in plan view, and is lower than the second main groove side edge 61b of the main groove 61P. It may be located far from the center 55 a of the side opening 55 .
- the upper opening side edge 56b may be located at a position overlapping the first main groove side edge 61a of the main groove 61Q in plan view.
- the upper opening 56 may extend to a position overlapping with a portion of the main groove 61Q in the Y direction.
- the upper opening side edge 56b may be located farther from the center 55a of the lower opening portion 55 than the first main groove side edge 61a of the main groove 61Q in plan view. It may be positioned closer to the center 55a of the lower opening 55 than the second main groove side edge 61b.
- the upper opening 56 may extend to a position where it overlaps the entire main groove 61Q in the Y direction.
- the upper opening side edge 56b may be located at a position overlapping the second main groove side edge 61b of the main groove 61Q in plan view, and is lower than the second main groove side edge 61b of the main groove 61Q. It may be located far from the center 55 a of the side opening 55 .
- the upper opening 56 of the first steam passage 51 extends from a region 56c overlapping the lower opening 55 in plan view. It may extend toward the outside of the frame body portion 32 .
- the lower opening 55 and the upper opening 56 in the first steam passage 51 are located between the frame portion 32 and the land portion 33 adjacent to the frame portion 32 .
- the upper opening 56 in the portion of the first steam passage 51 extending in the X direction will be described.
- the width of the upper opening 56 may be larger than the width of the lower opening 55 .
- the pair of lower opening side edges 55b described above is composed of a first lower opening side edge 55ba and a second lower opening side edge 55bb.
- the first lower opening side edge 55ba defines the boundary between the frame portion 32 and the lower opening portion 55
- the second lower opening side edge 55bb defines the boundary between the land portion 33 and the lower opening portion 55.
- the pair of upper opening side edges 56b described above is composed of a first upper opening side edge 56ba and a second upper opening side edge 56bb.
- the first upper opening side edge 56ba defines the boundary between the frame portion 32 and the upper opening portion 56
- the second upper opening side edge 56bb defines the boundary between the land portion 33 and the upper opening portion 56.
- the first upper opening side edge 56ba is located outside the frame portion 32 relative to the first lower opening side edge 55ba. In the example shown in FIG. 10, the first upper opening side edge 56ba is located on the left side of the first lower opening side edge 55ba.
- the upper opening 56 in the first steam passage 51 extends from a region 56c overlapping the lower opening 55 in plan view to the main groove 61 located in the land portion 33 in plan view. may extend to a position where they overlap with each other.
- the second upper opening side edge 56bb is positioned so as to overlap the liquid flow path portion 60 positioned on the land portion 33 .
- the second upper opening side edge 56bb is located on the right side of the second lower opening side edge 55bb.
- the upper opening 56 of the second steam passage 52 when viewed in a cross section perpendicular to the X direction, is located on the land portion 33 from a region 56c overlapping the lower opening 55 in plan view. It may extend to a position overlapping with the main groove 61 in plan view.
- the upper opening 56 in the second steam passage 52 extends from a region 56c overlapping the lower opening 55 in plan view to a position overlapping the main groove 61 in plan view on both sides of the lower opening 55. good too.
- the second steam passage 52 is positioned between the first land portion 33P and the second land portion 33Q that are adjacent to each other.
- the lower opening 55 and the upper opening 56 are located between the first land portion 33P and the second land portion 33Q.
- the upper opening 56 of the second steam passage 52 is located at the second land portion 33Q from the position overlapping the main groove 61 located at the first land portion 33P in plan view. It may extend to a position overlapping with the main groove 61 in plan view.
- Each upper opening side edge 56b is located at a position overlapping the liquid flow path portion 60 of the corresponding land portion 33P, 33Q.
- the upper opening side edge 56b located on the left side is located on the left side of the lower opening side edge 55b located on the left side.
- the upper opening side edge 56b located on the right side is located on the right side of the lower opening side edge 55b located on the right side.
- w12 indicates the distance from each wall surface protrusion 57, 58 to the corresponding upper opening side edge 56b.
- w12 may be, for example, 30 ⁇ m to 1400 ⁇ m.
- a distance w12 is the planar distance between the first wall protrusion 57 and the left upper opening side edge 56b when viewed in a cross section perpendicular to the X direction, and the right upper side from the second wall protrusion 58. It means the planar distance between the opening side edge 56b.
- the distance w12 corresponds to the dimension in the Y direction.
- w13 indicates the width of the land portion 33 on the second main body surface 30b.
- w13 may be, for example, 30 ⁇ m to 2900 ⁇ m.
- the width w13 means the distance from the upper opening side edge 56b defining one upper opening 56 to the upper opening side edge 56b defining the other upper opening 56 when viewed in a cross section perpendicular to the X direction. is doing.
- the width w13 corresponds to the dimension in the Y direction.
- the respective lower wall surfaces 53a, 53b of the lower steam channel recess 53 and the corresponding upper wall surfaces 54a, 54b of the upper steam channel recess 54 are connected by wall surface protrusions 57, 58. ing. More specifically, the lower wall surface 53 a of the lower steam flow channel recess 53 and the corresponding upper wall surface 54 a of the upper steam flow channel recess 54 are connected by the first wall surface protrusion 57 . The lower wall surface 53 b of the lower steam flow channel recess 53 and the corresponding upper wall surface 54 b of the upper steam flow channel recess 54 are connected by a second wall surface protrusion 58 .
- the first wall protrusion 57 is the left wall protrusion in FIG. 8A
- the second wall protrusion 58 is the right wall protrusion in FIG. 8A.
- the first wall surface protrusion 57 may protrude toward the inside of the steam passages 51 and 52 .
- the second wall protrusion 58 may protrude toward the inside of the steam passages 51 and 52 .
- a pair of wall projections 57 and 58 protrude in directions along the first body surface 30a and the second body surface 30b so as to face each other.
- the first wall surface protrusion 57 is arranged at an intermediate position MP between the first main body surface 30a and the second main body surface 30b in the Z direction.
- the present invention is not limited to this, and the first wall projection 57 may be displaced from the intermediate position MP.
- the first wall surface protrusion 57 is arranged at the same position as the second wall surface protrusion 58 in the Z direction.
- the present invention is not limited to this, and the first wall surface protrusion 57 may be displaced from the second wall surface protrusion 58 in the Z direction.
- the second wall surface protrusion 58 is arranged at an intermediate position MP between the first main body surface 30a and the second main body surface 30b in the Z direction.
- the second wall surface protrusion 58 may be displaced from the intermediate position MP.
- the second wall surface protrusion 58 is arranged at the same position as the first wall surface protrusion 57 in the Z direction.
- the present invention is not limited to this, and the second wall surface protrusion 58 may be displaced from the first wall surface protrusion 57 in the Z direction.
- a pair of wall surface protrusions 57 and 58 define a through portion 34 , and the lower steam channel recess 53 and the upper steam channel recess 54 communicate with each other in the through portion 34 .
- the planar shape of the penetrating portion 34 in the first steam passage 51 is a rectangular frame like the first steam passage 51 .
- the planar shape of the penetration portion 34 in the second steam passage 52 is an elongated rectangular shape like the second steam passage 52 .
- a width w4 (see FIG. 8A) of such a through portion 34 may be, for example, 200 ⁇ m to 500 ⁇ m.
- the width w4 of the penetrating portion 34 corresponds to the gap between the land portions 33 adjacent to each other in the Y direction. More specifically, the width w4 means the distance in the Y direction between the tip of the first wall projection 57 and the tip of the second wall projection 58 that define the penetrating portion 34 .
- the upper steam channel recess 54 may include two flat surfaces 59a and 59b when viewed in a cross section perpendicular to the X direction. Each flat surface 59a, 59b connects the corresponding upper wall surface 54a, 54b and the wall projections 57, 58 to each other.
- the flat surface 59a is the left surface in FIG. 8A
- the flat surface 59b is the right surface in FIG. 8A.
- the upper wall surface 54a is connected to the first wall surface protrusion 57 via one flat surface 59a, and the flat surface 59a is formed between the upper wall surface 54a and the first wall surface protrusion 57. ing.
- the upper wall surface 54b is connected to the second wall surface protrusion 58 via the other flat surface 59b, and the flat surface 59b is formed between the upper wall surface 54b and the second wall surface protrusion 58.
- the flat surfaces 59a, 59b may be along the second body surface 30b when viewed in cross section perpendicular to the X direction. In this case, the flat surfaces 59a, 59b may be parallel to the second body surface 30b or parallel to the first body surface 30a. However, the flat surfaces 59a, 59b may be inclined with respect to the second body surface 30b.
- the two flat surfaces 59a, 59b may both be along the second body surface 30b or both may be inclined with respect to the second body surface 30b. Alternatively, one of the two flat surfaces 59a, 59b may be along the second body surface 30b and the other may be inclined with respect to the second body surface 30b.
- the flat surfaces 59a and 59b may be formed flat.
- the flat surfaces 59a and 59b may be formed within a range of less than 3 ⁇ m in the direction perpendicular to the flat surfaces 59a and 59b when viewed in a cross section perpendicular to the X direction.
- the flat surfaces 59a and 59b may be formed within a range of less than 3 ⁇ m in the direction perpendicular to the flat surfaces 59a and 59b when viewed in a cross section perpendicular to the X direction.
- the flat surfaces 59a and 59b will be described in more detail with reference to FIG. 8F.
- the flat surface 59b will be described as a representative. Since the flat surface 59a is similar to the flat surface 59b, detailed description thereof is omitted.
- the reference line corresponding to the flat surface 59b is indicated by the line labeled 59c.
- the reference line 59c may be a straight line connecting the second wall surface protrusion 58 and the end point 54c of the upper wall surface 54b.
- the end point 54c may be the closest point to the second wall surface protrusion 58 on the upper wall surface 54b.
- the flat surface 59b may be formed within a range 59f between the first boundary line 59d and the second boundary line 59e.
- the first boundary line 59d may be a line deviated from the reference line 59c in a direction toward the first body surface 30a and parallel to the reference line 59c.
- the second boundary line 59e may be a line deviated from the reference line 59c in a direction toward the second main body surface 30b and parallel to the reference line 59c.
- a flat surface 59b may be formed within a range 59f defined in this way between the first boundary line 59d and the second boundary line 59e.
- the reference line 59c may be along the second main body surface 30b.
- the first boundary line 59d and the second boundary line 59e may also be along the second body surface 30b.
- the reference line 59c may be inclined with respect to the second main body surface 30b.
- the first boundary line 59d and the second boundary line 59e may also be inclined with respect to the second body surface 30b.
- the distance between the first boundary line 59d and the reference line 59c and the distance between the second boundary line 59e and the reference line 59c may be equal.
- the distance between the first boundary line 59d and the reference line 59c may be less than 1.5 ⁇ m.
- the distance between the second boundary line 59e and the reference line 59c may be less than 1.5 ⁇ m.
- the distance between the first boundary line 59d and the reference line 59c and the distance between the second boundary line 59e and the reference line 59c are not limited to being equal.
- the distance between the first boundary line 50d and the second boundary line 59e is less than 3.0 ⁇ m, the distance between the first boundary line 59d and the reference line 59c and the distance between the second boundary line 59e and the reference line 59c can be different.
- the first boundary line 59d may overlap the reference line 59c, or the second boundary line 59e may overlap the reference line 59c.
- h2 may be, for example, 20 ⁇ m to 250 ⁇ m.
- the depth h2 means the distance from the second main body surface 30b to the flat surfaces 59a and 59b when viewed in cross section perpendicular to the X direction.
- the depth h2 corresponds to the dimension in the Z direction.
- the width w3 of the upper opening 56 may be larger than the width w2 of the lower opening 55 over the entire area of the land portion 33 in the X direction. As a result, the cross-sectional area of the steam passages 51 and 52 can be increased over the entire region of the land portion 33 in the X direction.
- the steam passage portion 50 including the first steam passage 51 and the second steam passage 52 configured in this manner constitutes part of the sealed space 3 described above.
- the steam channel portion 50 according to the present embodiment is mainly defined by the lower sheet 10, the upper sheet 20, and the frame portion 32 and the land portion 33 of the wick sheet 30 described above.
- Each of the steam passages 51, 52 has a relatively large cross-sectional area for passage of the working steam 2a.
- FIG. 3 shows the first steam passage 51, the second steam passage 52, etc. in an enlarged manner for clarity of the drawing, and the number and arrangement of these steam passages 51, 52, etc. are not shown in the drawing. 2, different from FIGS.
- a plurality of support portions that support the land portion 33 to the frame portion 32 may be provided in the steam flow path portion 50 .
- a support portion may be provided to support the land portions 33 adjacent to each other. These support portions may be provided on both sides of the land portion 33 in the X direction, or may be provided on both sides of the land portion 33 in the Y direction.
- the support portion may be formed so as not to block the flow of the working steam 2a that diffuses through the steam channel portion 50 .
- the wick sheet 30 may be arranged on one side of the first main body surface 30a and the second main body surface 30b, and the other side may be provided with a space forming a steam flow path. As a result, the thickness of the supporting portion can be made thinner than the thickness of the wick sheet 30, and the first steam passage 51 and the second steam passage 52 can be prevented from being divided in the X direction and the Y direction.
- alignment holes 35 may be provided at the four corners of the wick sheet 30 in the same manner as the lower sheet 10 and the upper sheet 20 .
- the vapor chamber 1 may further include an injection part 4 for injecting the working fluid 2b into the sealed space 3 at one edge in the X direction.
- the injection part 4 is arranged on the evaporation region SR side and protrudes outside the vapor chamber 1 from the edge on the evaporation region SR side. Note that the injection part 4 does not have to protrude outside the vapor chamber 1 as shown in FIG.
- the injection part 4 includes a lower injection projection 11 (see FIG. 4), an upper injection projection 21 (see FIG. 5), and a wick sheet injection projection 36 (see FIGS. 6 and 7). and may have The lower injection protrusion 11 constitutes the lower seat 10 .
- the upper injection protrusion 21 constitutes the upper sheet 20 .
- the wick sheet injection protrusion 36 constitutes the wick sheet 30 .
- An injection channel 37 is formed in the wick sheet injection protrusion 36 of these. The injection channel 37 may extend from the first body surface 30a of the wick sheet 30 to the second body surface 30b, and may penetrate the wick sheet injection protrusion 36 of the wick sheet 30 in the Z direction.
- the injection channel 37 communicates with the steam channel portion 50 , and the working fluid 2 b is injected into the sealed space 3 through the injection channel 37 .
- the injection channel 37 may communicate with the liquid channel portion 60 depending on the arrangement of the liquid channel portion 60 .
- the upper and lower surfaces of the wick sheet injection projection 36 may be formed in a substantially flat shape, and the upper surface of the lower injection projection 11 and the lower surface of the upper injection projection 21 are also substantially flat. may be formed in The planar shape of each injection protrusion 11, 21, 36 may be the same.
- the present invention is limited to this. can be placed in any position.
- the injection flow path 37 provided in the wick sheet injection projection 36 does not have to penetrate the wick sheet injection projection 36 as long as the working fluid 2b can be injected.
- a concave portion formed in one of the first main body surface 30a and the second main body surface 30b of the wick sheet 30 can constitute the injection channel 37 communicating with the steam channel portion 50 .
- the liquid flow path section 60 may be provided between the lower sheet 10 and the wick sheet 30.
- the liquid flow path portion 60 is provided on the first main body surface 30a of the wick sheet 30.
- the liquid channel portion 60 may be a channel through which the working liquid 2b mainly passes.
- the working steam 2 a described above may pass through the liquid flow path portion 60 .
- the liquid channel portion 60 forms part of the above-described sealed space 3 and communicates with the vapor channel portion 50 .
- the liquid flow path portion 60 is configured as a capillary structure (wick) for transporting the working liquid 2b to the evaporation region SR.
- the liquid flow path portion 60 is provided on the first main body surface 30 a of each land portion 33 of the wick sheet 30 .
- the liquid flow path portion 60 may be formed over the entire first body surface 30 a of each land portion 33 .
- the second body surface 30 b of each land portion 33 may be provided with a liquid flow path portion 60 .
- the liquid flow path section 60 is an example of a groove aggregate including a plurality of grooves. More specifically, the liquid flow path portion 60 has a plurality of main grooves 61 through which the hydraulic fluid 2b passes, and a plurality of communication grooves 65 communicating with the main flow grooves 61 .
- the main groove 61 of the liquid flow path portion 60 is an example of a first groove.
- the communication groove 65 of the liquid flow path portion 60 is an example of a second groove.
- the main groove 61 and the communication groove 65 are grooves through which the hydraulic fluid 2b passes.
- the communication groove 65 communicates with the main groove 61 .
- Each mainstream groove 61 is formed to extend in the X direction, as shown in FIG.
- the main groove 61 mainly has a channel cross-sectional area smaller than that of the first steam passage 51 or the second steam passage 52 of the steam passage portion 50 so that the working fluid 2b flows by capillary action.
- the main groove 61 is configured to transport the working fluid 2b condensed from the working steam 2a to the evaporation region SR.
- Each main groove 61 may be spaced apart at equal intervals along the Y direction orthogonal to the X direction.
- the main groove 61 is formed by etching from the first main body surface 30a of the wick sheet 30 in an etching process to be described later. As a result, the main groove 61 has a curved wall surface 62 as shown in FIG. 8A.
- the wall surface 62 defines the mainstream groove 61 and is curved in a shape that expands toward the second main body surface 30b.
- the width w5 (dimension in the Y direction) of the main groove 61 may be, for example, 5 ⁇ m to 400 ⁇ m.
- the width w5 of the main groove 61 means the dimension on the first main body surface 30a.
- the depth h1 (dimension in the Z direction) of the main groove 61 may be, for example, 5 ⁇ m to 100 ⁇ m.
- each communication groove 65 extends in a direction different from the X direction.
- each communication groove 65 is formed to extend in the Y direction and perpendicular to the main groove 61 .
- Several communication grooves 65 are arranged so as to communicate the main grooves 61 adjacent to each other.
- Another communication groove 65 is arranged so as to communicate the steam flow path portion 50 (the first steam passage 51 or the second steam passage 52 ) and the main groove 61 . That is, the communication groove 65 extends from the side edge 33a of the land portion 33 in the Y direction to the main groove 61 adjacent to the side edge 33a. In this manner, the first steam passage 51 or the second steam passage 52 of the steam passage portion 50 and the main groove 61 are communicated with each other.
- the communication groove 65 has a channel cross-sectional area smaller than that of the first steam passage 51 or the second steam passage 52 of the steam passage portion 50 so that the working fluid 2b mainly flows by capillary action.
- Each communication groove 65 may be spaced apart at equal intervals along the X direction.
- the communication groove 65 is also formed by etching like the main groove 61 and has a curved wall surface (not shown) similar to that of the main groove 61 .
- the width w6 (dimension in the X direction) of the communication groove 65 may be equal to the width w5 of the main groove 61, but may be larger or smaller than the width w5.
- the depth of the communication groove 65 may be equal to the depth h1 of the main groove 61, but may be deeper or shallower than the depth h1.
- the liquid flow path section 60 has a row of projections 63 provided on the first main body surface 30 a of the wick sheet 30 .
- the row of protrusions 63 is provided between the main grooves 61 adjacent to each other.
- Each projection row 63 includes a plurality of projections 64 (an example of liquid flow path projections) arranged in the X direction.
- the convex portion 64 is provided inside the liquid flow path portion 60 and is in contact with the upper sheet 20 .
- Each convex portion 64 is formed in a rectangular shape in plan view so that the X direction is the longitudinal direction.
- a main groove 61 is interposed between the protrusions 64 adjacent to each other in the Y direction, and a communication groove 65 is interposed between the protrusions 64 adjacent to each other in the X direction.
- the communication groove 65 is formed so as to extend in the Y direction, and communicates the main grooves 61 adjacent to each other in the Y direction. This allows the hydraulic fluid 2b to flow between the main grooves 61. As shown in FIG.
- the convex portion 64 is a portion where the material of the wick sheet 30 remains without being etched in the etching process described later.
- the planar shape of the convex portion 64 is the shape at the position of the first main body surface 30a of the wick sheet 30, but is rectangular.
- the protrusions 64 are arranged in a zigzag pattern. More specifically, the convex portions 64 of the convex portion rows 63 that are adjacent to each other in the Y direction are arranged to be shifted from each other in the X direction. This shift amount may be half the arrangement pitch of the protrusions 64 in the X direction.
- the width w7 (dimension in the Y direction) of the convex portion 64 may be, for example, 5 ⁇ m to 500 ⁇ m.
- the width w7 of the convex portion 64 means the dimension on the first main body surface 30a.
- the arrangement of the protrusions 64 is not limited to being staggered, and may be arranged in parallel. In this case, the convex portions 64 of the convex portion rows 63 adjacent to each other in the Y direction are also aligned in the Y direction.
- the main groove 61 includes an intersection 66 that communicates with the communication groove 65 .
- the main groove 61 and the communication groove 65 communicate with each other in a T-shape.
- the other side for example, the lower side in FIG. 9
- Communication of the communication groove 65 with the main groove 61 can be avoided.
- the communication grooves 65 existing on both sides of one main groove 61 in the Y direction are arranged at different positions in the X direction.
- the position of the wall surface 62 of the main groove 61 that is cut out by the communication groove 65 on one side in the Y direction and the position that is cut out by the communication groove 65 on the other side in the Y direction are X Can be different in direction.
- the wall surface 62 of the main groove 61 can remain on the other side in the Y direction.
- the continuous space is formed in a T shape, and the deterioration of the capillary action of the main groove 61 can be suppressed. Therefore, it is possible to prevent the driving force of the working fluid 2b toward the evaporation region SR from decreasing at the crossing portion 66 .
- the materials forming the lower sheet 10, the upper sheet 20, and the wick sheet 30 are not particularly limited as long as they have good thermal conductivity to the extent that the heat dissipation efficiency of the vapor chamber 1 can be ensured.
- the material of each sheet 10, 20, 30 may include copper or a copper alloy with good thermal conductivity and corrosion resistance when using pure water as the working fluid.
- copper include pure copper and oxygen-free copper (C1020).
- copper alloys include copper alloys containing tin, copper alloys containing titanium (such as C1990), and Corson copper alloys (such as C7025), which are copper alloys containing nickel, silicon and magnesium.
- a copper alloy containing tin is, for example, phosphor bronze (C5210 or the like).
- the thickness t1 of the vapor chamber 1 shown in FIG. 3 may be, for example, 100 ⁇ m to 500 ⁇ m.
- the thickness t1 of the vapor chamber 1 may be, for example, 100 ⁇ m to 500 ⁇ m.
- the vapor flow path portion 50 can be properly secured, so that the vapor chamber 1 can function properly.
- the thickness t1 to 500 ⁇ m or less it is possible to suppress the thickness t1 of the vapor chamber 1 from increasing.
- the thickness of the wick sheet 30 may be thicker than the thickness of the lower sheet 10 .
- the thickness of the wick sheet 30 may be thicker than the thickness of the upper sheet 20 .
- an example in which the thickness of the lower sheet 10 and the thickness of the upper sheet 20 are equal is shown, but the thickness of the lower sheet 10 and the thickness of the upper sheet 20 are not limited to this.
- the length can be different.
- the thickness t2 of the lower sheet 10 may be, for example, 6 ⁇ m to 100 ⁇ m. By setting the thickness t2 of the lower sheet 10 to 6 ⁇ m or more, the mechanical strength and long-term reliability of the lower sheet 10 can be ensured. On the other hand, by setting the thickness t2 of the lower sheet 10 to 100 ⁇ m or less, it is possible to suppress the thickness t1 of the vapor chamber 1 from increasing. Similarly, the thickness t3 of the upper sheet 20 may be set to be the same as the thickness t2 of the lower sheet 10 .
- the thickness t4 of the wick sheet 30 may be, for example, 50 ⁇ m to 300 ⁇ m. By setting the thickness t4 of the wick sheet 30 to 50 ⁇ m or more, the vapor channel portion 50 can be properly secured, and the vapor chamber 1 can be properly operated. On the other hand, by setting the thickness to 300 ⁇ m or less, it is possible to suppress the thickness t1 of the vapor chamber 1 from increasing.
- the thickness t4 of the wick sheet 30 may be the distance between the first main body surface 30a and the second main body surface 30b.
- the vapor chamber 1 according to the present embodiment having such a configuration can be manufactured by referring to the manufacturing method described later with reference to FIGS. 18 to 23.
- the flat surfaces 59a and 59b of the upper vapor passage concave portion 54 can be easily formed by adjusting etching conditions such as the shape of the resist, the flow of the etchant, and the etching time.
- the vapor chamber 1 obtained as described above is installed in a housing H of a mobile terminal or the like, and the housing member Ha is attached to the second upper sheet surface 20b of the upper sheet 20. Alternatively, the vapor chamber 1 is attached to the housing member Ha.
- An electronic device D such as a CPU, which is a device to be cooled, is attached to the first lower seat surface 10 a of the lower seat 10 . Alternatively, the vapor chamber 1 is attached to the electronic device D.
- the hydraulic fluid 2b in the sealed space 3 adheres to the wall surface of the sealed space 3 due to its surface tension.
- the hydraulic fluid 2b adheres to the wall surface of the .
- the working fluid 2b may also adhere to the portion of the second lower seat surface 10b of the lower seat 10 exposed to the lower steam flow path concave portion 53 .
- the working fluid 2b may also adhere to the portions of the first upper sheet surface 20a of the upper sheet 20 that are exposed to the upper steam flow path concave portion 54, the main groove 61, and the connecting groove 65. As shown in FIG.
- the working fluid 2b present in the evaporation region SR receives heat from the electronic device D.
- the received heat is absorbed as latent heat and the working fluid 2b evaporates (vaporizes) to generate the working steam 2a.
- Most of the generated working steam 2a diffuses within the first steam passage 51 and the second steam passage 52 that form the sealed space 3 (see solid line arrows in FIG. 7). More specifically, in the portion of the first steam passage 51 of the steam passage portion 50 that extends in the X direction and the second steam passage 52, the working steam 2a mainly diffuses in the X direction.
- the working steam 2a mainly diffuses in the Y direction.
- the upper opening 56 is larger than the lower opening 55, so that the cross-sectional areas of the steam passages 51 and 52 are increased. Therefore, the flow path resistance of the working steam 2a is reduced, and the working steam 2a can diffuse smoothly.
- the working steam 2a in each of the steam passages 51, 52 leaves the evaporation region SR, and most of the working steam 2a is transported to the relatively low-temperature condensation region CR (the right portion in FIGS. 6 and 7). be.
- the condensation region CR the working steam 2a is mainly radiated to the upper sheet 20 and cooled.
- the heat received by the upper sheet 20 from the working steam 2a is transferred to the outside air through the housing member Ha (see FIG. 3).
- the working steam 2a By radiating heat to the upper sheet 20 in the condensation area CR, the working steam 2a loses the latent heat absorbed in the evaporation area SR and condenses to produce the working fluid 2b.
- the generated hydraulic fluid 2b is applied to the wall surfaces 53a, 53b, 54a, 54b of the respective vapor passage recesses 53, 54, the flat surfaces 59a, 59b, the second lower sheet surface 10b of the lower sheet 10, and the second lower sheet surface 10b of the upper sheet 20. 1 adheres to the upper sheet surface 20a.
- the working fluid 2b continues to evaporate in the evaporation region SR.
- the working fluid 2b in the area other than the evaporation area SR (that is, the condensation area CR) of the liquid flow path portion 60 is transported toward the evaporation area SR by the capillary action of each main groove 61 (see FIG. 7 (see dashed arrow in ).
- the working fluid 2b adhering to the wall surfaces 53a, 53b, 54a, 54b, the flat surfaces 59a, 59b, the second lower seat surface 10b, and the first upper seat surface 20a moves to the liquid flow path portion 60.
- each main groove 61 and each communication groove 65 are filled with the hydraulic fluid 2b. Therefore, the working fluid 2b filled therein obtains a driving force toward the evaporation area SR due to the capillary action of each main groove 61, and is smoothly transported toward the evaporation area SR.
- each main groove 61 communicates with another adjacent main groove 61 via a corresponding communication groove 65 .
- the hydraulic fluid 2b is prevented from flowing between the main grooves 61 adjacent to each other, and the occurrence of dryout in the main grooves 61 is suppressed. Therefore, a capillary action is imparted to the working fluid 2b in each main groove 61, and the working fluid 2b is smoothly transported toward the evaporation region SR.
- the working fluid 2b adhering to the wall surfaces 53a, 53b, 54a, 54b and the flat surfaces 59a, 59b of the vapor flow path recesses 53, 54 is also caused by the capillary action of the vapor flow path recesses 53, 54 to reach the evaporation region SR. can be transported.
- the steam channel recesses 53 and 54 mainly function as channels for the working steam 2a, but the working fluid 2b adhering to the wall surfaces 53a, 53b, 54a and 54b and the flat surfaces 59a and 59b can be imparted with capillary action. .
- the working fluid 2b that has reached the evaporation region SR receives heat from the electronic device D again and evaporates.
- the working steam 2a evaporated from the working fluid 2b passes through the communication groove 65 in the evaporation region SR and moves to the lower steam flow channel recess 53 and the upper steam flow channel recess 54 having a large flow channel cross-sectional area. It diffuses in the passage recesses 53,54.
- the working fluids 2a and 2b circulate in the sealed space 3 while repeating phase changes, that is, evaporation and condensation, thereby diffusing the heat of the electronic device D and releasing it. As a result, the electronic device D is cooled.
- the upper opening 56 located on the second main body surface 30b and the lower opening 55 located on the first main body surface 30a It extends from a region 56c that overlaps with the main groove 61 in plan view to a position that overlaps with the main groove 61 in plan view.
- the cross-sectional areas of the steam passages 51 and 52 can be increased. Therefore, the flow path resistance of the working steam 2a can be reduced, and the working steam 2a can be easily diffused. As a result, the heat radiation efficiency of the vapor chamber 1 can be improved, and the cooling efficiency of the electronic device D can be improved.
- the upper steam passage recess 54 when viewed in a cross section perpendicular to the X direction, includes a flat surface 59a connecting the upper wall surface 54a and the wall surface protrusions 57 and 58, which correspond to each other. 59b included.
- the flat surfaces 59a and 59b are formed flat. As a result, the flow path resistance of the working steam 2a can be further reduced, and the working steam 2a can be diffused more easily.
- the upper opening 56 when viewed in a cross section perpendicular to the X direction, the upper opening 56 extends from the region 56c overlapping the lower opening 55 in plan view to the lower opening 55. On both sides, it extends to a position overlapping with the main groove 61 in a plan view.
- the cross-sectional areas of the steam passages 51 and 52 can be further increased. Therefore, the flow path resistance of the working steam 2a can be reduced, and the working steam 2a can be easily diffused. As a result, the heat radiation efficiency of the vapor chamber 1 can be improved, and the cooling efficiency of the electronic device D can be improved.
- the upper opening 56 when viewed in a cross section perpendicular to the X direction, extends from the region 56c overlapping the lower opening 55 in plan view to the lower opening 55.
- An example has been described in which the grooves extend to positions overlapping the main grooves 61 in a plan view on both sides.
- the upper opening 56 overlaps the main groove 61 in plan view on one side with respect to the lower opening 55 from a region 56c that overlaps the lower opening 55 in plan view. It may extend to a position.
- the upper opening 56 does not have to extend to a position on the other side of the lower opening 55 and overlap the main groove 61 in a plan view.
- the cross-sectional area of the steam passages 51 and 52 can be increased.
- the upper opening 56 extends leftward with respect to the lower opening 55 .
- the upper steam channel recessed portion 54 includes one flat surface 59a when viewed in a cross section perpendicular to the X direction.
- the flat surface 59a is arranged on the side where the upper opening 56 extends.
- the flat surface 59a connects the one upper wall surface 54a and the first wall projection 57 .
- the other upper wall surface 54b and the second wall surface protrusion 58 are connected without interposing a flat surface 59b (see FIG. 8A).
- the upper opening side edge 56b located on the opposite side of the flat surface 59a may be positioned so as to overlap the corresponding lower opening side edge 55b in plan view.
- the center 55a of the lower opening 55 and the center 56a of the upper opening 56 may be displaced from each other.
- the upper steam passage concave portion 54 includes the flat surfaces 59a and 59b when viewed in a cross section perpendicular to the X direction.
- the upper steam channel recess 54 may include convex surfaces 75a, 75b.
- the convex surfaces 75a, 75b connect the upper wall surfaces 54a, 54b and the wall projections 57, 58 corresponding to each other.
- the convex surface 75a is the left surface in FIG. 12, and the convex surface 75b is the right surface in FIG.
- the upper wall surface 54a is connected to the first wall surface protrusion 57 via one convex surface 75a, and the upper wall surface 54b is connected to the second wall surface protrusion 58 via the other convex surface 75b. It is connected to the.
- Each of the convex surfaces 75 a , 75 b includes a spatial convexity 76 .
- the space convex portion 76 extends in the X direction and protrudes toward the second main body surface 30b.
- the working steam 2a can be rectified so as to flow along the space convex portion 76. As shown in FIG. Therefore, the flow path resistance of the working steam 2a can be reduced, and the working steam 2a can be diffused more easily.
- Each of the convex surfaces 75a, 75b may include a plurality of spaced convexities 76 spaced apart from each other.
- a concavely curved surface 77 may be formed between two adjacent spatial convexities 76 .
- a concave curved surface 77 may also be formed between the wall surface projections 57 and 58 and the adjacent spatial projections 76 .
- the convex surfaces 75a, 75b include two spatial convexities 76.
- the working steam 2a can be further rectified.
- h3 may be, for example, 20 ⁇ m to 250 ⁇ m.
- the depth h3 means the maximum distance from the second main body surface 30b to the convex surfaces 75a and 75b when viewed in a cross section perpendicular to the X direction.
- the depth h3 corresponds to the dimension in the Z direction.
- h4 may be, for example, 17 ⁇ m to 245 ⁇ m.
- the depth h4 means the distance from the second main body surface 30b to the tip of the spatial projection 76 when viewed in a cross section perpendicular to the X direction.
- the depth h4 corresponds to the dimension in the Z direction.
- the interval between the spatial projections 76 is indicated by w14.
- w14 may be, for example, 30 ⁇ m to 300 ⁇ m.
- the interval w14 means the pitch distance between the spatial convex portions 76 adjacent to each other when viewed in a cross section perpendicular to the X direction.
- the interval w14 corresponds to the dimension in the Y direction.
- the upper steam passage concave portion 54 includes the flat surfaces 59a and 59b when viewed in a cross section perpendicular to the X direction.
- the upper steam channel recess 54 may not include flat surfaces 59a, 59b.
- the upper wall surfaces 54a, 54b and the wall surface protrusions 57, 58 are connected without intervening the flat surfaces 59a, 59b.
- the upper opening 56 positioned on the second body surface 30b overlaps the main groove 61 in plan view from the region 56c that overlaps the lower opening 55 positioned in the first body face 30a in plan view. It should be extended to As a result, the cross-sectional areas of the steam passages 51 and 52 can be increased, and the flow resistance of the working steam 2a can be reduced.
- the lower wall surfaces 53a, 53b may be convexly curved.
- the lower wall surfaces 53a, 53b and the upper wall surfaces 54a, 54b may be connected without the wall surface protrusions 57, 58 intervening.
- the lower wall surfaces 53a, 53b and the upper wall surfaces 54a, 54b may be connected without interposing the flat surfaces 59a, 59b.
- the cross-sectional area of the steam passages 51 and 52 can be increased, and the flow resistance of the working steam 2a can be reduced.
- the lower wall surfaces 53a, 53b and the upper wall surfaces 54a, 54b may be connected via flat surfaces 59a, 59b.
- the width w3 of the upper opening 56 is larger than the width w2 of the lower opening 55 over the entire area of the land 33 in the X direction.
- the area where the width w3 of the upper opening 56 is larger than the width w2 of the lower opening 55 may be a part of the land 33 in the X direction. .
- the upper opening 56 includes a first region 56d and a second region 56e.
- the first region 56d is a region where the upper opening 56 extends from a region 56c overlapping the lower opening 55 in plan view to a position overlapping the main groove 61 in plan view.
- the second region 56e is a region where the upper opening 56 does not extend from the region 56c overlapping the lower opening 55 in plan view to the position overlapping the main groove 61 in plan view.
- the width w3 is larger than the width w2.
- the width w3 in the second region 56e is, for example, smaller than the width w3 in the first region 56d as shown in FIG. 15B.
- the width w3 may be equal to the width w2, and the upper opening 56 may overlap the lower opening 55 in plan view. More specifically, the upper opening side edge 56b is positioned so as to overlap the corresponding lower opening side edge 55b in a plan view, and the upper opening side edge 56b is in plane with the corresponding lower opening side edge 55b. They are located in a position where they overlap visually. As a result, the bonding area between the land portion 33 and the upper sheet 20 can be increased, and the mechanical strength of the vapor chamber 1 can be improved.
- the position of the first region 56d and the position of the second region 56e in the X direction are arbitrary.
- the first region 56d may be positioned in the evaporation region SR and the second region 56e may be positioned in the condensation region CR.
- the cross-sectional areas of the steam passages 51 and 52 can be increased in the evaporation region SR where the pressure of the working steam 2a tends to increase.
- the first region 56d may be located in the condensation region CR and the second region 56e may be located in the evaporation region SR.
- the flow velocity of the working steam 2a can be reduced in the condensation region CR, and condensation can be promoted.
- the first region 56d may be located in the middle part of the vapor chamber 1 in the X direction.
- the first region 56d may be located in a region of the condensation region CR that is close to the evaporation region SR.
- the flow path resistance of the working steam diffused from the evaporation region SR can be reduced, and the working steam 2a can be diffused to a position far from the evaporation region SR.
- the heat dissipation efficiency of the vapor chamber 1 can be improved.
- FIG. 16 (Second embodiment) Next, a body sheet for a vapor chamber, a vapor chamber, and electronic equipment according to a second embodiment of the present invention will be described with reference to FIGS. 16 to 25.
- FIG. 16 (Second embodiment)
- the first wall surface protrusion is located at an intermediate position between the first body surface and the second body surface in the normal direction of the first body surface.
- the main difference is that they are staggered.
- Other configurations are substantially the same as those of the first embodiment shown in FIGS. 16 to 25, the same parts as those in the first embodiment shown in FIGS. 1 to 15 are denoted by the same reference numerals, and detailed description thereof will be omitted.
- the center 55a of the lower opening 55 is displaced from the center 56a of the upper opening 56 when viewed in cross section perpendicular to the X direction. More specifically, in the portion of the first steam passage 51 extending in the X direction, the center 55a of the lower opening 55 is shifted to one side in the Y direction with respect to the center 56a of the upper opening 56. are placed. Similarly, in the second steam passage 52 as well, the center 55 a of the lower opening 55 is shifted to one side in the Y direction with respect to the center 56 a of the upper opening 56 .
- the cross-sectional shapes of the first steam passage 51 and the second steam passage 52 may be asymmetrical in the Y direction.
- the shift amount s1 between the center 55a of the lower opening 55 and the center 56a of the upper opening 56 may be, for example, 0.05 mm to (0.8 ⁇ w1) mm.
- the distance By setting the distance to 0.05 mm or more, it is possible to realize the effects described later due to the deviation between the center 55a and the center 56a.
- the width w1 of the land portion 33 can be reduced to 80% or less.
- the width w1 (see FIG. 17) of the land portion 33 according to the present embodiment may be, for example, 100 ⁇ m to 1500 ⁇ m.
- the width w2 of the lower opening 55 according to this embodiment may be, for example, 100 ⁇ m to 5000 ⁇ m.
- the width w3 of the upper opening 56 according to the present embodiment may be, for example, 100 ⁇ m to 5000 ⁇ m, similar to the width w2 of the lower opening 55 described above. However, the width w3 of the upper opening 56 may differ from the width w2 of the lower opening 55 .
- each lower opening side edge 55b When viewed in a cross section perpendicular to the X direction, each lower opening side edge 55b is displaced from the corresponding upper opening side edge 56b. Each lower opening side edge 55b is shifted to the right with respect to the corresponding upper opening side edge 56b.
- each lower opening side edge 55b may be displaced to one side with respect to the corresponding upper opening side edge 56b.
- a pair of wall surface protrusions 57 and 58 obliquely protrude toward each other.
- a first wall projection 57 projects upward and to the right.
- a second wall projection 58 projects downward to the left.
- the first wall surface protrusion 57 is displaced from the intermediate position MP between the first main body surface 30a and the second main body surface 30b in the Z direction.
- the Z direction is the thickness direction of the wick sheet 30 and corresponds to the normal direction of the first main body surface 30a.
- the first wall projection 57 may be arranged closer to the first main body surface 30a than the intermediate position MP described above. In this case, the first wall projection 57 is arranged at a position closer to the first body surface 30a than the second body surface 30b.
- a distance s2 from the first main body surface 30a to the first wall projection 57 may be, for example, h1 or more and may be less than t4/2.
- h1 is the depth of the main groove 61 as described above.
- t4 is the thickness of the wick sheet 30 as described above.
- the second wall surface protrusion 58 is displaced from the middle position MP between the first main body surface 30a and the second main body surface 30b in the Z direction.
- the second wall surface protrusion 58 may be arranged closer to the second main body surface 30b than the intermediate position MP described above.
- the second wall projection 58 is arranged at a position closer to the second body surface 30b than to the first body surface 30a.
- the distance s3 from the second body surface 30b to the second wall projection 58 may be equal to the distance s2 from the first body surface 30a to the first wall projection 57, or may be different from the distance s2.
- the distance s3 may be, for example, h1 or more and may be less than t4/2.
- FIG. 18 a method of manufacturing the vapor chamber 1 of this embodiment having such a configuration will be described with reference to FIGS. 18 to 23.
- FIG. 18 a method of manufacturing the vapor chamber 1 of this embodiment having such a configuration will be described with reference to FIGS. 18 to 23.
- a flat metal material sheet M including a lower surface Ma (an example of a first material surface) and an upper surface Mb (an example of a second material surface) is prepared.
- the metal material sheet M may be formed of a rolled material having a desired thickness.
- a lower resist film 70 is formed on the lower surface Ma of the metal material sheet M, and an upper resist film 71 is formed on the upper surface Mb.
- the lower surface Ma and the upper surface Mb of the metal material sheet M may be subjected to acid degreasing treatment as pretreatment.
- each of the resist films 70 and 71 may be formed by coating a liquid resist on the lower surface Ma and the upper surface Mb and drying and curing the resist.
- each resist film 70, 71 may be formed by applying a dry film resist to the lower surface Ma and the upper surface Mb.
- the lower resist film 70 and the upper resist film 71 are patterned by photolithography.
- a first resist opening 72 corresponding to the lower opening 55 is formed in the lower resist film 70
- a second resist opening 73 corresponding to the main groove 61 and the connecting groove 65 of the liquid flow path 60 is formed.
- a third resist opening 74 corresponding to the upper opening 56 is formed in the upper resist film 71 .
- the center of the first resist opening 72 is shifted to one side in the Y direction with respect to the center of the corresponding third resist opening 74 .
- the dimension w2' of the first resist opening 72 in the Y direction may be equal to or different from the dimension w3' of the third resist opening 74 in the Y direction.
- w2' is a dimension corresponding to the width w2 of the lower opening 55 and is a dimension set for forming the width w2 of the lower opening 55 by etching.
- w3' is a dimension corresponding to the width w3 of the lower opening 55 and is a dimension set for forming the width w3 of the upper opening 56 by etching.
- the lower surface Ma and the upper surface Mb of the metal material sheet M are etched as an etching step.
- portions of the lower surface Ma of the metal material sheet M corresponding to the first resist opening 72 and the second resist opening 73 are etched.
- the lower steam channel concave portion 53 of the steam channel portion 50 and the main groove 61 and the connecting groove 65 of the liquid channel portion 60 are formed as shown in FIG.
- portions of the upper surface Mb corresponding to the third resist openings 74 are etched to form the upper steam channel concave portions 54 of the steam channel portion 50 as shown in FIG. 21 .
- a ferric chloride-based etchant such as a ferric chloride aqueous solution or a copper chloride-based etchant such as a copper chloride aqueous solution can be used.
- the etching may etch the lower surface Ma and the upper surface Mb of the metal material sheet M at the same time. However, it is not limited to this, and the etching of the lower surface Ma and the upper surface Mb may be performed as separate steps. Also, the vapor channel portion 50 and the liquid channel portion 60 may be formed by etching at the same time, or may be formed by separate steps.
- etching step by etching the lower surface Ma and the upper surface Mb of the metal material sheet M, a predetermined contour shape of the wick sheet 30 as shown in FIGS. 6 and 7 is obtained.
- the lower resist film 70 and the upper resist film 71 are removed as a resist removing process.
- the lower sheet 10 and the upper sheet 20 are joined as a joining process, as shown in FIG.
- the lower sheet 10 and the upper sheet 20 may be formed of a rolled material having a desired thickness.
- the lower sheet 10, the wick sheet 30 and the upper sheet 20 are laminated in this order.
- the first main body surface 30a of the wick sheet 30 is overlaid on the second lower sheet surface 10b of the lower sheet 10
- the first upper sheet surface 20a of the upper sheet 20 is superimposed on the second main body surface 30b of the wick sheet 30.
- the sheets 10 , 20 , 30 are aligned using the alignment hole 12 of the lower sheet 10 , the alignment hole 35 of the wick sheet 30 , and the alignment hole 22 of the upper sheet 20 .
- the lower sheet 10, the wick sheet 30 and the upper sheet 20 are temporarily fixed.
- these sheets 10, 20, 30 may be tacked by spot resistance welding, and these sheets 10, 20, 30 may be tacked by laser welding.
- Diffusion bonding is a method in which the lower sheet 10 and the wick sheet 30 to be bonded are brought into close contact with each other, and the wick sheet 30 and the upper sheet 20 are brought into close contact with each other to join these sheets 10 , 20 , 30 .
- the sheets 10, 20, 30 are pressurized in the stacking direction and heated in a controlled atmosphere such as vacuum or inert gas. As a result, the sheets 10, 20 and 30 are joined together using diffusion of atoms occurring on the joining surfaces.
- Diffusion bonding heats the material of each sheet 10, 20, 30 to a temperature close to its melting point, but below its melting point, thereby avoiding melting and deformation of each sheet 10, 20, 30. More specifically, the frame portion 32 of the wick sheet 30 and the first main body surface 30a of each land portion 33 are diffusion-bonded to the second lower sheet surface 10b of the lower sheet 10 . Further, the second main body surface 30b of the frame portion 32 and the land portions 33 of the wick sheet 30 is diffusion-bonded to the first upper sheet surface 20a of the upper sheet 20 surface. In this way, the sheets 10, 20, 30 are diffusion-bonded to form the sealed space 3 having the vapor channel portion 50 and the liquid channel portion 60 between the lower sheet 10 and the upper sheet 20. be done.
- the lower injection protrusion 11 of the lower sheet 10 and the wick sheet injection protrusion 36 of the wick sheet 30 are diffusion-bonded.
- the wick sheet injection protrusion 36 and the upper injection protrusion 21 of the upper sheet 20 are diffusion-bonded.
- the injection channel 37 becomes a closed space.
- the working fluid 2b is injected from the injection part 4 into the sealed space 3.
- the working fluid 2b passes through the injection channel 37 and is supplied to the sealed space 3 .
- the injection channel 37 described above is sealed.
- the injection part 4 may be partially melted to seal the injection channel 37 .
- the communication between the sealed space 3 and the outside is cut off, the working fluid 2b is sealed in the sealed space 3, and the working fluid 2b in the sealed space 3 is prevented from leaking to the outside.
- the injection part 4 may be cut.
- the vapor chamber 1 according to the present embodiment is obtained.
- the working fluid 2b adhering to the wall surfaces 53a, 53b, 54a, 54b of the respective vapor passage recesses 53, 54 can also be transported to the evaporation region SR by the capillary action of the vapor passage recesses 53, 54.
- the steam channel recesses 53 and 54 mainly function as channels for the working steam 2a, but the working fluid 2b adhering to the wall surfaces 53a, 53b, 54a and 54b can be imparted with capillary action.
- the length of the wall surface means the length along the wall surface when viewed in a cross section perpendicular to the X direction.
- the first wall surface protrusion 57 is positioned closer to the first body surface than the intermediate position MP between the first body surface 30a and the second body surface 30b in the Z direction. 30a.
- the length of the lower wall surface 53a connected to the first wall surface protrusion 57 is shortened, and the capillary action applied to the hydraulic fluid 2b adhering to the lower wall surface 53a is enhanced.
- the length of the upper wall surface 54a connected to the first wall surface protrusion 57 becomes longer.
- the action of retaining the hydraulic fluid 2b on the upper wall surface 54a is enhanced, and the amount of the hydraulic fluid 2b retained on the upper wall surface 54a can be increased.
- the working fluid 2b retained on the upper wall surface 54a moves over the first wall surface protrusion 57 to the lower wall surface 53a and is transported to the evaporation area SR by the capillary action of the lower wall surface 53a. Therefore, the working fluid 2b held on the upper wall surface 54a can increase the transport amount of the working fluid 2b to the evaporation region SR.
- the lower wall surface 53a is connected to the first main body surface 30a, and the main groove 61 and the communication groove 65 of the liquid flow path portion 60 are provided in the first main body surface 30a. In this case, the lower wall surface 53a and the liquid flow path portion 60 are brought closer to each other, and the working fluid 2b can flow between the lower wall surface 53a and the liquid flow path portion 60.
- the second wall projection 58 is arranged closer to the second body surface 30b than the intermediate position MP between the first body surface 30a and the second body surface 30b in the Z direction. ing.
- the length of the upper wall surface 54b connected to the second wall surface protrusion 58 is shortened, and the capillary action applied to the hydraulic fluid 2b adhering to the upper wall surface 54b is enhanced.
- the length of the lower wall surface 53b connected to the second wall surface protrusion 58 is longer.
- the action of retaining the hydraulic fluid 2b in the lower wall surface 53b can be enhanced, and the amount of the hydraulic fluid 2b retained in the lower wall surface 53b can be increased.
- the working fluid 2b held on the lower wall surface 53b moves over the second wall surface protrusion 58 to the upper wall surface 54b and is transported to the evaporation area SR by the capillary action of the upper wall surface 54b. Therefore, the working fluid 2b held by the lower wall surface 53b can increase the transport amount of the working fluid 2b to the evaporation region SR.
- the lower wall surface 53b is connected to the first main body surface 30a, and the main groove 61 and the communication groove 65 of the liquid flow path portion 60 are provided in the first main body surface 30a.
- the lower wall surface 53 b and the liquid flow path portion 60 are brought closer to each other, and the working fluid 2 b held on the lower wall surface 53 b can move to the liquid flow path portion 60 .
- This also makes it possible to increase the transport amount of the working fluid 2b to the evaporation region SR.
- the working liquid 2b can be transported to the evaporation area SR not only by the liquid flow path section 60 but also by the vapor flow path section 50.
- the lower wall surface 53 a of the lower steam channel recess 53 and the upper wall surface 54 a of the upper steam channel recess 54 are connected by the first wall surface projection 57 .
- the first wall protruding portion 57 protrudes toward the inside of the steam channel portion 50, and is arranged to be displaced from an intermediate position MP between the first main body surface 30a and the second main body surface 30b in the Z direction. there is This makes it possible to make the length of the lower wall surface 53a and the length of the upper wall surface 54a different when viewed in a cross section perpendicular to the X direction.
- the first main body surface 30a is provided with the liquid flow path portion 60 including the plurality of main flow grooves 61 and the plurality of communication grooves 65, and the first wall protrusion 57 is provided on the first main body surface 30a. It is arranged closer to the first body surface 30a than the intermediate position MP between the surface 30a and the second body surface 30b. As a result, the first wall projection 57 can be brought closer to the liquid flow path section 60 . Therefore, the capillary action applied to the working fluid 2b adhering to the lower wall surface 53a near the liquid flow path portion 60 can be enhanced, and the working fluid 2b flows between the lower wall surface 53a and the liquid flow path portion 60. can come and go. In this case, the working fluid 2b can be collected in the lower wall surface 53a or the liquid flow path portion 60, whichever has the stronger capillary action, and the transport amount of the working fluid 2b to the evaporation region SR can be increased.
- the lower wall surface 53b of the lower steam flow channel recess 53 and the upper wall surface 54b of the upper steam flow channel recess 54 are connected by the second wall surface protrusion 58.
- the second wall surface projecting portion 58 projects toward the inside of the steam channel portion 50, and is arranged to be displaced from the middle position MP between the first main body surface 30a and the second main body surface 30b in the Z direction. there is This makes it possible to make the length of the lower wall surface 53b and the length of the upper wall surface 54b different when viewed in a cross section perpendicular to the X direction.
- the center 55a of the lower opening 55 of the steam flow path portion 50 located on the first main body surface 30a of the wick sheet 30 is aligned with the upper opening 56 located on the second main body surface 30b. are displaced with respect to the center 56a of the .
- the first wall surface protrusion 57 and the second wall surface protrusion 58 can be easily displaced from the intermediate position MP between the first main body surface 30a and the second main body surface 30b. Therefore, the transport amount of the working fluid 2b to the evaporation region SR can be easily increased.
- the center 55a of the lower opening 55 is displaced from the center 56a of the upper opening 56, the difference between the width w2 of the lower opening 55 and the width w3 of the upper opening 56 is can be reduced.
- the first wall surface protrusion 57 is arranged closer to the first body surface 30a than the intermediate position MP, and the second wall surface protrusion 58 is located closer to the intermediate position MP than the intermediate position MP.
- An example in which it is located near the second body surface 30b has been described. However, it is not limited to this.
- the first wall surface protrusion 57 is arranged closer to the second main body surface 30b than the intermediate position MP, and the second wall surface protrusion 58 is arranged closer to the first main body surface 30a than the intermediate position MP.
- the second wall surface protrusion 58 can be brought closer to the liquid flow path section 60 , and the working fluid 2 b can flow between the lower wall surface 53 b and the liquid flow path section 60 .
- the second wall surface protrusion 58 may be arranged at the intermediate position MP.
- the first wall surface protrusion 57 is arranged closer to the first main body surface 30a than the intermediate position MP, and the second wall surface protrusion 58 is located closer to the first main body surface 30a than the intermediate position MP. It may be arranged near the main body surface 30a.
- the distance s4 from the first main body surface 30a to the first wall projection 57 may be, for example, 20 ⁇ m or more.
- distance s4 may be less than t4/2 and may be less than or equal to h1.
- a distance s5 from the first body surface 30a to the second wall projection 58 may be equal to or different from the distance s4.
- the distance s5 may be, for example, 20 ⁇ m or more.
- the distance s5 may be less than t4/2 and may be less than or equal to h1.
- the first wall surface protrusion 57 is arranged closer to the first body surface 30a than the intermediate position MP, and the second wall surface protrusion 58 is located closer to the first main body surface 30a than the intermediate position MP. 1 It is arranged near the main body surface 30a.
- the first wall surface protrusion 57 and the second wall surface protrusion 58 can be brought closer to the liquid flow path portion 60 . Therefore, the capillary action applied to the working fluid 2b adhering to the lower wall surface 53a and the lower wall surface 53b near the liquid flow path portion 60 can be enhanced.
- the working fluid 2b can travel between the lower wall surface 53a and the liquid flow path portion 60, and the working fluid 2b can travel between the lower wall surface 53b and the liquid flow path portion 60. Therefore, the working fluid 2b can be collected in the portion of the lower wall surface 53a, the lower wall surface 53b, and the liquid flow path portion 60 where the capillary action is strong, and the transport amount of the working fluid 2b to the evaporation region SR can be increased.
- the first wall surface protrusion 57 is arranged closer to the first main body surface 30a than the intermediate position MP, and the second wall surface protrusion 58 is located closer to the intermediate position MP. are also located near the first body surface 30a.
- the flow path of the working steam 2a that diffuses in the upper steam flow path concave portion 54 can be approximated to a large circular shape. Therefore, the flow path resistance of the working steam 2a can be reduced, and the working steam 2a can be easily diffused. Therefore, the heat radiation efficiency of the vapor chamber 1 can be improved, and the cooling efficiency of the electronic device D can be improved.
- the lower wall surface 53b of the lower steam flow channel recessed portion 53 and the upper wall surface 54b of the upper steam flow channel recessed portion 54 are connected by the second wall surface projecting portion 58 .
- the lower wall surface 53b and the upper wall surface 54b may be formed in a concave shape continuously from the lower wall surface 53b to the upper wall surface 54b.
- the lower wall surface 53b and the upper wall surface 54b may be formed so as to protrude outward from the steam passage recesses 53 and .
- the lower wall surface 53b and the upper side are arranged so as to bulge outward from the steam passage recesses 53 and 54 from the straight line connecting the right lower opening side edge 55b and the right upper opening side edge 56b shown in FIG.
- a wall surface 54b may be formed.
- the lower wall surface 53b and the upper wall surface 54b may be continuously and smoothly curved.
- the etching rate of the portion of the lower vapor passage recess 53 on the side of the lower wall surface 53b is relatively increased with respect to the etching rate of the portion on the side of the lower wall surface 53a.
- the first resist opening 72 may be formed so as to reduce the etching rate of the portion of the lower vapor channel recess 53 on the side of the lower wall surface 53a. This makes it possible to increase the etching rate of the portion of the lower vapor passage recess 53 on the lower side wall surface 53b side than the etching rate of the portion on the lower side wall surface 53a side.
- the third resist opening 74 may be formed so as to reduce the etching rate of the portion of the upper vapor passage concave portion 54 on the side of the upper wall surface 54a. This makes it possible to increase the etching rate of the portion of the upper vapor passage recess 54 on the side of the upper wall surface 54b more than the etching rate of the portion on the side of the upper wall surface 54a. In this manner, the lower wall surface 53b and the upper wall surface 54b are formed so that the second wall surface protrusion 58 is not formed. As a result, the lower wall surface 53b and the upper wall surface 54b are continuously formed in a concave shape from the lower wall surface 53b to the upper wall surface 54b.
- the lower wall surface 53b and the upper wall surface 54b are continuously formed in a concave shape from the lower wall surface 53b to the upper wall surface 54b.
- the flow path of the working steam 2a that diffuses in the steam flow path recesses 53 and 54 can be approximated to a large circular shape. Therefore, the flow path resistance of the working steam 2a can be reduced, and the working steam 2a can be easily diffused. Therefore, the heat radiation efficiency of the vapor chamber 1 can be improved, and the cooling efficiency of the electronic device D can be improved.
- FIG. 26 (Third Embodiment) Next, a body sheet for a vapor chamber, a vapor chamber, and electronic equipment according to a third embodiment of the present invention will be described with reference to FIGS. 26 to 35.
- FIG. 26 (Third Embodiment)
- the second main body surface is provided with third spatial recesses located on both sides of the second spatial recess.
- a pair of third wall projections connecting each of the wall surfaces of the second spatial recesses and the corresponding third wall surface of the third spatial recesses protrudes toward the second main body surface.
- the first steam passage 51 and the second steam passage 52 of the steam passage portion 50 are respectively a lower steam passage recess 53 and a first upper steam passage. It has a channel recess 81 and a second upper steam channel recess 82 .
- the lower steam channel recessed portion 53 is an example of a first spatial recessed portion, and is provided in the first main body surface 30a.
- the first upper steam channel recess 81 is an example of a second space recess, and is provided in the second main body surface 30b.
- the second upper steam flow channel recessed portion 82 is an example of a third spatial recessed portion, and is provided in the second main body surface 30b.
- the first upper steam channel recess 81 has a pair of first upper wall surfaces 81a and 81b.
- the first upper wall surfaces 81a and 81b are an example of a second wall surface.
- the first upper wall surface 81a is the wall surface on the left side in FIG. 26, and the first upper wall surface 81b is the wall surface on the right side in FIG.
- the first upper steam channel recess 81 and first upper wall surfaces 81a, 81b in the present embodiment are substantially the same as the upper steam channel recess 54 and upper wall surfaces 54a, 54b shown in FIG. 16 and the like. Therefore, detailed description of the first upper steam flow passage recess 81 and the first upper wall surfaces 81a and 81b is omitted.
- the second upper steam flow channel recessed portions 82 are positioned on both sides of the first upper steam flow channel recessed portion 81 when viewed in a cross section perpendicular to the X direction.
- Each second upper steam channel recess 82 communicates with the first upper steam channel recess 81 and forms a continuous opening in the second main body surface 30b.
- the second upper steam flow path concave portion 82 is formed in a concave shape on the second body surface 30b of the wick sheet 30 by etching the second body surface 30b of the wick sheet 30 in a second etching process described later.
- the second upper steam passage recess 82 has a curved second upper wall surface 82a, as shown in FIG.
- the second upper wall surface 82a is an example of a third wall surface.
- the second upper wall surface 82 a defines a second upper steam passage recess 82 and forms part of the first steam passage 51 and part of the second steam passage 52 .
- the upper opening 83 in the present embodiment is located on the second main body surface 30b, and is the opening of the first upper steam flow channel recess 81 and the second upper steam flow channel recess 82 on the second main body surface 30b.
- the planar shape of the upper opening 83 in the first steam passage 51 is, as shown in FIG. 6, a rectangular frame shape.
- the planar shape of the upper opening 83 in the second steam passage 52 is an elongated rectangular shape, as shown in FIG.
- the upper opening 83 is an opening defined by the first upper steam channel recess 81 and the second upper steam channel recess 82 in the second main body surface 30b.
- the width w8 of the upper opening 83 may be, for example, 200 ⁇ m to 6000 ⁇ m.
- the width w8 of the upper opening 83 is the dimension of the upper opening 83 in the Y direction.
- the width w8 of the upper opening 83 corresponds to the Y-direction dimension of the portion of the first steam passage 51 extending in the X-direction, and corresponds to the Y-direction dimension of the second steam passage 52 .
- the dimension in the Y direction between the second upper wall surfaces 82a of the pair of second upper steam flow passage recesses 82 defining the steam passages 51, 52 is from the first main body surface 30a to the second main body surface 30b. , and is maximized at the second body surface 30b.
- the width w8 is the maximum value of the dimension in the Y direction between the pair of second upper wall surfaces 82a.
- the dimension in the Y direction between the pair of second upper wall surfaces 82a does not have to be maximized at the second main body surface 30b.
- the position where the dimension in the Y direction between the pair of second upper wall surfaces 82a is maximum may be located closer to the first main body surface 30a than to the second main body surface 30b.
- the width w8 also corresponds to the X-direction dimension of the portion of the first steam passage 51 that extends in the Y-direction.
- the width w8 of the upper opening 83 may be larger than the width w2 of the lower opening 55.
- the upper opening 83 may extend from the region 56c overlapping the lower opening 55 in plan view to a position overlapping the main groove 61 in plan view.
- the cross-sectional shapes of the first steam passage 51 and the second steam passage 52 may be symmetrical in the Y direction. That is, the center 55a of the lower opening 55 and the center 83a of the upper opening 83 may be arranged at the same position in the Y direction.
- the upper opening 83 is defined by a pair of upper opening side edges 83b (an example of second opening side edges) extending in the X direction.
- the center 83a of the upper opening 83 described above is the middle point of the pair of upper opening side edges 83b when viewed in a cross section perpendicular to the X direction.
- the upper opening side edge 83b is shown as the intersection of the second main body surface 30b and the second upper wall surface 82a of the second upper steam passage recess 82, and the midpoint of these intersections is the upper side. It is the center 83 a of the opening 83 .
- Each upper opening side edge 83b is displaced to one side with respect to the corresponding lower opening side edge 55b.
- the right upper opening edge 83b of the upper opening 83 is shifted to the right with respect to the right lower opening edge 55b of the lower opening 55.
- the edge 83b is displaced to the left with respect to the left lower opening side edge 55b.
- the width w8 of the upper opening 83 is larger than the width w2 of the lower opening 55.
- the first upper side wall surfaces 81a, 81b of the first upper steam flow channel recessed portion 81 do not extend to the second body surface 30b.
- the width w9 of the opening when the first upper wall surfaces 81a and 81b are extended to the second main body surface 30b along the curved shape of the first upper wall surfaces 81a and 81b is equal to the width w3 of the upper opening 56 shown in FIG. may be equal. That is, in the first patterning step, which will be described later, the third resist opening 94 formed in the first upper resist film 91 formed on the second body surface 30b corresponds to the first lower resist formed on the first body surface 30a. It may be equal to the first resist opening 92 formed in the film 90 .
- each of the first upper wall surfaces 81a and 81b of the first upper steam flow channel recess 81 and the corresponding second upper wall surface 82a of the second upper steam flow channel recess 82 form a third wall surface protrusion. 84 is connected.
- the first upper side wall surfaces 81a and 81b do not extend to the second main body surface 30b, and the first upper steam flow path recess 81 communicates with the second upper steam flow path recess 82 on its side.
- the third wall surface protrusion 84 may protrude toward the second main body surface 30b.
- the third wall projection 84 may be formed to protrude toward the upper sheet 20 .
- the third wall projection 84 is positioned closer to the first body surface 30a than to the second body surface 30b and is spaced apart from the first upper sheet surface 20a of the upper sheet 20 .
- the respective lower wall surfaces 53a, 53b of the lower steam channel recess 53 and the corresponding first upper wall surfaces 81a, 81b of the first upper steam channel recess 81 are connected by wall surface projections 57, 58. More specifically, the lower wall surface 53 a of the lower steam flow channel recess 53 and the corresponding first upper wall surface 81 a of the first upper steam flow channel recess 81 are connected by the first wall surface protrusion 57 . The lower wall surface 53 b of the lower steam flow channel recess 53 and the corresponding first upper wall surface 81 b of the first upper steam flow channel recess 81 are connected by a second wall surface protrusion 58 .
- the first wall projection 57 is the left wall projection in FIG. 26, and the second wall projection 58 is the right wall projection in FIG.
- the first wall projection 57 may be arranged at an intermediate position MP between the first main body surface 30a and the second main body surface 30b.
- the second wall surface protrusion 58 may be arranged at an intermediate position MP between the first body surface 30a and the second body surface 30b.
- a pair of wall surface protrusions 57 and 58 define a through portion 34 , and in the through portion 34 , the lower steam channel recess 53 and the first upper steam channel recess 81 communicate with each other.
- a width w10 (see FIG. 26) of such a through portion 34 may be, for example, 400 ⁇ m to 1600 ⁇ m.
- the width w10 of the penetrating portion 34 corresponds to the gap between the land portions 33 adjacent to each other in the Y direction. More specifically, the width w10 means the distance in the Y direction between the tip of the first wall projection 57 and the tip of the second wall projection 58 that define the penetrating portion 34 .
- the width w11 (see FIG. 26) of the land portion 33 may be, for example, 100 ⁇ m to 1500 ⁇ m.
- the width w11 of the land portion 33 is the maximum dimension of the land portion 33 in the Y direction. More specifically, the width w11 of the land portion 33 means the distance in the Y direction between the tip of the first wall projection 57 defining the land 33 and the tip of the second wall projection 58 .
- a first lower resist film 90 is formed on the lower surface Ma of the metal material sheet M and on the upper surface Mb, as shown in FIG. A first upper resist film 91 is formed.
- the first resist formation step may be performed in the same manner as the resist formation step shown in FIG.
- the first lower resist film 90 and the first upper resist film 91 are patterned by photolithography.
- a first resist opening 92 corresponding to the lower opening 55 is formed in the first lower resist film 90
- a second resist opening 92 corresponding to the main groove 61 and the connecting groove 65 of the liquid flow path 60 is formed.
- An opening 93 is formed.
- a third resist opening 94 corresponding to the upper opening 83 is formed in the first upper resist film 91 .
- a dimension w9' of the third resist opening 94 in the Y direction corresponds to the width w9 shown in FIG. 26, and is a dimension set for forming the width w9 by etching. w9' may be equal to or different from the dimension w3' of the first resist opening 92 in the Y direction.
- the lower surface Ma and upper surface Mb of the metal material sheet M are etched in the same manner as in the etching step shown in FIG.
- the lower steam channel recessed portion 53 of the steam channel portion 50 as shown in FIG. be done.
- a first upper steam channel recessed portion 81 of the steam channel portion 50 is formed in the upper surface Mb.
- the first lower resist film 90 and the first upper resist film 91 are removed as the first resist removing process.
- a second lower resist film 95 is formed on the lower surface Ma of the metal material sheet M, and a second lower resist film 95 is formed on the upper surface Mb.
- An upper resist film 96 is formed.
- a wall surface resist film 97 is formed on the lower wall surfaces 53 a and 53 b of the lower steam channel recess 53 and the first upper wall surfaces 81 a and 81 b of the first upper steam channel recess 81 .
- the second lower resist film 95, the second upper resist film 96 and the wall surface resist film 97 may be formed using a liquid resist.
- the wall surface resist film 97 can be easily formed on the lower wall surfaces 53a, 53b and the first upper wall surfaces 81a, 81b.
- the lower surface Ma and upper surface Mb of the metal material sheet M and the wall surfaces 53a, 53b, 81a, 81b may be subjected to an acid degreasing treatment as pretreatment.
- the second upper resist film 96 and the wall surface resist film 97 are patterned by photolithography.
- the second upper resist film 96 and the wall surface resist film 97 are formed with fourth resist openings 98 corresponding to the second upper vapor flow channel recesses 82 .
- a fourth resist opening 98 is formed extending from the second upper resist film 96 to the wall surface resist film 97 .
- the fourth resist opening 98 may be formed such that the opening edge on the side opposite to the first upper vapor channel recess 81 satisfies the dimension w8′ in the Y direction.
- w8' is a dimension corresponding to the width w8 of the upper opening 83, and is a dimension set for forming the width w8 of the upper opening 83 by etching.
- the upper surface Mb of the metal material sheet M and the first upper wall surfaces 81a and 81b of the first upper steam flow channel recessed portion 81 are etched in the same manner as the etching step shown in FIG. is etched.
- the second upper steam channel recessed portion 82 of the steam channel portion 50 is formed in the upper surface Mb of the metal material sheet M and the first upper wall surfaces 81a and 81b.
- the second lower resist film 95 and the second upper resist film 96 are removed as a second resist removing process.
- the first upper side wall surfaces 81 a and 81 b of the first upper steam channel recess 81 and the second upper steam channel recesses 82 positioned on both sides of the first upper steam channel recess 81 is connected to the second upper wall surface 82 a by a third wall surface projection 84 .
- a third wall projection 84 protrudes toward the second body surface 30b.
- the portion of the upper sheet 20 that overlaps the upper opening 83 receives the pressure of the atmosphere on the second upper sheet surface 20b, so that the pressure of the first upper steam passage concave portion 81 of the steam passage portion 50 and the It is conceivable that it may enter into the second upper steam flow channel concave portion 82 . In this case, it is possible to prevent the portion of the upper sheet 20 from entering deeper than the third wall surface projecting portion 84 . Therefore, it is possible to prevent the second upper sheet surface 20b of the upper sheet 20 from being deformed into a concave shape. In this case, the adhesion between the electronic device D and the lower sheet 10 can be improved, and the thermal resistance between the electronic device D and the vapor chamber 1 can be reduced.
- the first wall surface protrusion 57 and the second wall surface protrusion 58 are arranged at an intermediate position MP between the first main body surface 30a and the second main body surface 30b in the Z direction. I explained an example of However, it is not limited to this.
- the first wall projection 57 may be arranged to be displaced from the intermediate position MP in the Z direction.
- the first wall projection 57 is arranged closer to the first main body surface 30a than the intermediate position MP.
- a distance s2 from the first body surface 30a to the first wall projection 57 may be the same as the distance s2 shown in FIG.
- the second wall surface protrusion 58 may be displaced from the intermediate position MP in the Z direction.
- the second wall projection 58 is arranged closer to the second main body surface 30b than the intermediate position MP.
- a distance s3 from the second main body surface 30b to the second wall projection 58 may be the same as the distance s3 shown in FIG.
- first wall surface protrusion 57 and the second wall surface protrusion 58 are arranged in the same manner as in the example shown in FIG.
- the cross-sectional shapes of the first steam passage 51 and the second steam passage 52 may be asymmetrical in the Y direction.
- the center 55a of the lower opening 55 is displaced from the center 83a of the upper opening 83 to one side in the Y direction.
- FIG. 35 shows an example in which the lower opening 55 is shifted to the right with respect to the upper opening 83, it may be shifted to the left.
- the shift amount between the center 55a of the lower opening 55 and the center 83a of the upper opening 83 may be equal to the shift amount s1 shown in FIG.
- the right upper opening edge 83b of the upper opening 83 is shifted to the right with respect to the right lower opening edge 55b of the lower opening 55.
- the edge 83b is displaced to the left with respect to the left lower opening side edge 55b.
- the width w8 of the upper opening 83 is larger than the width w2 of the lower opening 55.
- the right upper opening side edge 83b of the upper opening 83 is aligned with the right lower opening of the lower opening 55. It may be displaced to the left with respect to the side edge 55b.
- the right upper opening side edge 83b of the upper opening 83 may be arranged at the same position as the right lower opening side edge 55b.
- the end of the first wall surface located on the side of the first main body surface is located inside the steam flow path portion rather than the protrusion in plan view. are mainly different.
- Other configurations are substantially the same as those of the first embodiment shown in FIGS. 36 to 47, the same parts as in the first embodiment shown in FIGS. 1 to 17 are denoted by the same reference numerals, and detailed description thereof will be omitted.
- the vapor chamber 100 will be described. As shown in FIGS. 36 and 37, the vapor chamber 100 has a sealed space 103 filled with working fluids 2a and 2b. By repeating the phase change of the working fluids 2a and 2b in the sealed space 103, the electronic device D of the electronic equipment E described above is effectively cooled.
- the vapor chamber 100 includes a lower sheet 110, an upper sheet 120, and a wick sheet 130 for the vapor chamber.
- the wick sheet 130 for the vapor chamber is hereinafter simply referred to as the wick sheet 130 .
- Vapor chamber 100 according to the present embodiment has lower sheet 110, wick sheet 130 and upper sheet 120 laminated in this order.
- the vapor chamber 100 is generally formed in the shape of a thin flat plate. Although the planar shape of the vapor chamber 100 is arbitrary, it may be rectangular as shown in FIG. The planar shape of the vapor chamber 100 may be, for example, a rectangle with one side of 50 mm or more and 200 mm or less and the other side of 150 mm or more and 60 mm or a square with one side of 70 mm or more and 300 mm or less. The planar dimensions of the vapor chamber 100 are arbitrary. In the present embodiment, as an example, an example in which the planar shape of the vapor chamber 100 is a rectangular shape whose longitudinal direction is the X direction, which will be described later, will be described.
- the lower sheet 110, upper sheet 120 and wick sheet 130 may have the same planar shape as the vapor chamber 100, as shown in FIGS.
- the planar shape of the vapor chamber 100 is not limited to a rectangular shape, and may be any shape such as a circular shape, an elliptical shape, an L-shape, or a T-shape.
- the vapor chamber 100 has an evaporation area SR where the working fluids 2a and 2b evaporate and a condensation area CR where the working fluids 2a and 2b condense.
- the evaporation area SR is an area that overlaps with the electronic device D in plan view, and is an area where the electronic device D is attached. Evaporation region SR may be located anywhere in vapor chamber 100 . In the present embodiment, an evaporation region SR is formed on one side (the left side in FIG. 36) of the vapor chamber 100 in the X direction. Heat from the electronic device D is transmitted to the evaporation region SR, and the working fluid 2b is evaporated in the evaporation region SR by this heat. Heat from the electronic device D can be transmitted not only to the area overlapping the electronic device D in plan view, but also to the periphery of the area.
- the evaporation region SR includes a region overlapping the electronic device D and a peripheral region thereof in plan view.
- the planar view may be a state in which the vapor chamber 100 is viewed from a direction orthogonal to the surface receiving heat from the electronic device D and the surface emitting the received heat.
- the surface that receives heat corresponds to a second upper sheet surface 120b of the upper sheet 120, which will be described later.
- the heat-releasing surface corresponds to a first lower sheet surface 110a of the lower sheet 110, which will be described later.
- the state of the vapor chamber 100 viewed from above or the state viewed from below corresponds to a plan view.
- the condensation area CR is an area that does not overlap the electronic device D in plan view, and is an area where the working steam 2a mainly releases heat and condenses.
- the condensation area CR may be the area around the evaporation area SR. Heat from the working steam 2a is released to the lower sheet 110 in the condensation area CR, and the working steam 2a is cooled and condensed in the condensation area CR.
- the vertical relationship may be disrupted depending on the orientation of the mobile terminal.
- the sheet that receives heat from the electronic device D is referred to as the upper sheet 120 described above, and the sheet that releases the received heat is referred to as the lower sheet 110 described above. Therefore, the following description will be made with the lower sheet 110 arranged on the lower side and the upper sheet 120 arranged on the upper side.
- the lower sheet 110 is an example of the first sheet.
- the lower seat 110 has a first lower seat surface 110a positioned opposite to the wick seat 130 and a second lower seat surface 110b positioned opposite to the first lower seat surface 110a. is doing.
- the second lower seat surface 110b is located on the wick seat 130 side.
- the lower sheet 110 may be formed flat as a whole, and the lower sheet 110 may have a uniform thickness as a whole.
- a housing member Ha forming part of a housing of a mobile terminal or the like may be attached to the first lower seat surface 110a.
- the entire first lower seat surface 110a may be covered with the housing member Ha.
- alignment holes 112 may be provided at the four corners of the lower sheet 110 .
- the upper sheet 120 is an example of a second sheet.
- the upper sheet 120 has a first upper sheet surface 120a provided on the side of the wick sheet 130, and a second upper sheet surface 120b positioned opposite to the first upper sheet surface 120a.
- the upper sheet 120 may be formed flat overall, and the upper sheet 120 may have a uniform thickness overall.
- the electronic device D described above may be attached to this second upper sheet surface 120b.
- alignment holes 122 may be provided at the four corners of the upper sheet 120 .
- the wick sheet 130 is an example of a body sheet.
- the wick sheet 130 includes a vapor channel portion 150 and a liquid channel portion 160 arranged adjacent to the vapor channel portion 150 .
- the wick sheet 130 also has a first main body surface 131a and a second main body surface 131b opposite to the first main body surface 131a.
- the first body surface 131a is arranged on the lower seat 110 side, and the second body surface 131b is arranged on the upper seat 120 side.
- the second lower sheet surface 110b of the lower sheet 110 and the first main body surface 131a of the wick sheet 130 may be permanently bonded to each other by diffusion bonding.
- the first upper sheet surface 120a of the upper sheet 120 and the second body surface 131b of the wick sheet 130 may be permanently bonded together by diffusion bonding.
- the lower sheet 110, the upper sheet 120 and the wick sheet 130 may be joined by other methods such as brazing instead of diffusion joining as long as they can be joined permanently.
- the wick sheet 130 has a frame body portion 132 formed in a rectangular frame shape in a plan view and land portions provided in the frame body portion 132. 133 and .
- the frame portion 132 and each land portion 133 extend from the first body surface 131a to the second body surface 131b.
- the frame portion 132 and the land portion 133 are portions where the material of the wick sheet 130 remains without being etched in the etching process described later.
- the frame body portion 132 is formed in a rectangular frame shape in plan view.
- a steam channel portion 150 is defined inside the frame portion 132 . Inside the frame portion 132 , the working steam 2 a flows around the land portion 133 .
- the land portion 133 may extend in an elongated shape with the X direction as the longitudinal direction in plan view.
- the planar shape of the land portion 133 may be an elongated rectangular shape.
- the land portions 133 may be arranged parallel to each other with equal intervals in the Y direction.
- the working steam 2a flows around each land portion 133 and is transported toward the condensation area CR. This suppresses obstruction of the flow of the working steam 2a.
- a width w21 (see FIG. 42) of the land portion 133 may be, for example, 36 ⁇ m or more and 4000 ⁇ m or less.
- the width w21 of the land portion 133 is the dimension of the land portion 133 in the Y direction, and means the dimension at the thickest position of the land portion 133 (for example, the position where the first wall surface end portion 153b described later exists). is doing.
- the frame body part 132 and each land part 133 are diffusion-bonded to the lower sheet 110 and are diffusion-bonded to the upper sheet 120 . Thereby, the mechanical strength of the vapor chamber 100 is improved.
- a first wall surface 153 a , a second wall surface 154 a and a protrusion 155 of the steam passage 151 which will be described later, form side walls of the land portion 133 .
- a first wall surface 153a, a second wall surface 154a and a protrusion 155 are formed on both sides of each land portion 133 in the width direction (X direction).
- the cross-sectional shape (see FIG. 42) along the width direction (X direction) of each land portion 133 may be a line-symmetrical shape.
- the width w26 of the land portion 133 at the position where the protrusion 155 exists may be, for example, 30 ⁇ m or more and 3000 ⁇ m or less.
- the first main body surface 131a and the second main body surface 131b of the wick sheet 130 may be formed flat over the frame body portion 132 and each land portion 133 .
- the side wall of the frame portion 132 has substantially the same shape as the side wall of the land portion 133 .
- the present invention is not limited to this, and the side wall of the frame portion 132 does not necessarily have to have substantially the same shape as the side wall of the land portion 133 .
- the steam channel portion 50 is an example of a through space.
- the steam channel portion 150 is mainly a channel through which the working steam 2a passes.
- the steam channel portion 150 extends from the first body surface 131 a to the second body surface 131 b and penetrates the wick sheet 130 .
- the steam passage section 150 in this embodiment has a plurality of steam passages 151.
- Each steam passage 151 is formed inside the frame portion 132 and outside the land portion 133 . That is, the steam passage 151 is formed between the frame portion 132 and the land portion 133 and between adjacent land portions 133 .
- the planar shape of each steam passage 151 is an elongated rectangular shape.
- the plurality of land portions 133 divide the steam flow path portion 150 into a plurality of steam passages 151 .
- the steam passage 151 is formed to extend from the first main body surface 131a of the wick sheet 130 to the second main body surface 131b.
- the steam passage 151 may be formed by etching from the first main body surface 131a and the second main body surface 131b of the wick sheet 130 in an etching process to be described later.
- the steam passage 151 has a curved first wall surface 153a and a curved second wall surface 154a.
- the first wall surface 153a is located on the side of the first main body surface 131a, and is curved in a curved shape that is recessed toward the inside in the width direction of the land portion 133.
- the second wall surface 154a is located on the side of the second main body surface 131b, and is curved in a curved shape that is recessed toward the inside in the width direction of the land portion 133.
- the first wall surface 153 a and the second wall surface 154 a meet at a protrusion 155 formed to protrude inside the steam passage 151 .
- the protrusion 155 may be formed at an acute angle or an obtuse angle when viewed in cross section.
- a width w27 (see FIG. 42) between a pair of protrusions 155 adjacent to each other with the steam passage 151 interposed therebetween may be, for example, 30 ⁇ m or more and 3000 ⁇ m or less.
- the width w27 between the pair of protrusions 155 means the distance measured in the width direction (Y direction) of the steam passage 151 at the position where the protrusions 155 exist.
- the first wall surface 153a has a first wall surface end portion 153b located on the first body surface 131a side.
- the upper end of the first wall surface 153a is a protrusion 155, which corresponds to the end of the first wall surface 153a on the second body surface 131b side.
- the lower end of the first wall surface 153a is the first wall surface end portion 153b, which corresponds to the end portion of the first wall surface 153a on the first body surface 131a side.
- the first wall surface 153a contacts the lower sheet 110 at the first wall surface end 153b.
- the first wall surface end portion 153b may be formed to have an acute angle when viewed in cross section. In FIG. 42, a point 153c of the first wall surface 153a that is most recessed inward in the width direction (Y direction) of the land portion 133 in a cross-sectional view.
- the second wall surface 154a has a second wall surface end portion 154b located on the second body surface 131b side.
- the upper end of the second wall surface 154a is the second wall surface end portion 154b, which corresponds to the end portion of the second wall surface 154a on the second body surface 131b side.
- the lower end of the second wall surface 154a is a protrusion 155, which corresponds to the end of the second wall surface 154a on the first body surface 131a side.
- the second wall surface 154a contacts the upper sheet 120 at the second wall surface end 154b.
- the second wall surface end portion 154b may constitute the outer edge of the convex portion 164, which will be described later. Note that the second wall surface end portion 154b may be formed at an obtuse angle when viewed in cross section.
- the first wall surface end portion 153b is positioned inside the steam flow path portion 150 relative to the projection portion 155 in plan view. That is, in plan view, the second wall surface end portion 154b, the point 153c, the protrusion 155, and the first wall surface end portion 153b are present in this order from the inner side to the outer side of the land portion 133 in the width direction (Y direction). The outside corresponds to the steam channel portion 150 side.
- the planar area of the steam passage 151 is maximized at the position where the second wall surface end 154b exists, and becomes minimum at the position where the first wall surface end 153b exists.
- a width w22 (see FIG.
- the distance between the second wall surface end portion 154b and the projection portion 155 in the width direction (Y direction) of the steam passage portion 150 is Lp
- the second wall surface end portion 154b and the first wall surface end portion 153b Let Ls be the distance between At this time, the distance Ls may be 1.05 times or more and 2 times or less the distance Lp, or may be 1.05 times or more and 1.8 times or less. Since the distance Ls is 1.05 times or more the distance Lp, the bonding area between the land portion 133 and the lower sheet 110 is increased, and the strength of diffusion bonding in the vicinity of the first wall surface end portion 153b is increased. can be done.
- the distance Ls is twice or less than the distance Lp, the width of the steam passage 151 is ensured, and the working steam 2a can smoothly flow through the steam passage 151 .
- the distance Ls may be 6 ⁇ m or more and 500 ⁇ m or less.
- the distance Lp may be 3 ⁇ m or more and 400 ⁇ m or less.
- the distance Ls between the second wall surface end portion 154b and the first wall surface end portion 153b may be 1.1 times or more and 10 times or less of the width w25 of the convex portion 164, which will be described later. Since the distance Ls is 1.1 times or more the width w25, the bonding area between the land portion 133 and the lower sheet 110 is increased, and diffusion bonding or brazing is performed near the first wall surface end portion 153b. Bonding strength can be increased. Since the distance Ls is 10 times or less the width w25, the width of the steam passage 151 is ensured, and the working steam 2a can flow smoothly in the steam passage 151.
- the protrusion 155 in the thickness direction (Z direction) of the wick sheet 130 is located closer to the second body surface 131b than the intermediate position Pz between the first body surface 131a and the second body surface 131b.
- the distance t25 between the protrusion 155 and the second main body surface 131b is t25
- the distance t25 may be 5% or more, 10% or more, or 20% or more of the thickness t24 of the wick sheet 130 described later.
- the distance t25 may be 45% or less, 40% or less, or 30% or less of the thickness t24 of the wick sheet 130.
- the steam flow path section 150 including the steam passage 151 configured in this way constitutes part of the sealed space 103 described above.
- steam channel portion 150 is mainly defined by lower sheet 110, upper sheet 120, and frame portion 132 and land portion 133 of wick sheet 130 described above.
- Each steam passage 151 has a relatively large channel cross-sectional area through which the working steam 2a passes.
- FIG. 37 shows the steam passages 151 and the like in an enlarged manner for clarity of the drawing, and the number and arrangement of these steam passages 151 and the like are different from FIGS. 36, 40 and 41. ing.
- a support portion 139 is provided inside the steam flow path portion 150 to support the land portion 133 on the frame portion 132 .
- the support portion 139 supports the land portions 133 adjacent to each other.
- the support portions 139 are provided on both sides of the land portion 133 in the longitudinal direction (X direction).
- the support portion 139 may be formed so as not to block the flow of the working steam 2a that diffuses through the steam passage portion 150 .
- the support portion 139 is arranged on the first main body surface 131a side of the wick sheet 130, and a space communicating with the steam channel portion 150 is formed on the second main body surface 131b side.
- the thickness of the support portion 139 can be made thinner than the thickness of the wick sheet 130, and the steam passage 151 can be prevented from being divided in the X direction and the Y direction.
- the present invention is not limited to this, and the support portion 139 may be arranged on the side of the second body surface 131b. Further, a space communicating with the steam flow path portion 150 may be formed on both the surface of the support portion 139 on the first body surface 131a side and the surface on the second body surface 131b side.
- alignment holes 135 may be provided at the four corners of the wick sheet 130 .
- the vapor chamber 100 may further include an injection part 104 for injecting the working fluid 2b into the sealed space 103 at one edge in the X direction.
- the injection part 104 is arranged on the evaporation region SR side.
- the injection part 104 has an injection channel 37 formed in the wick sheet 130 .
- the injection channel 137 is formed on the second main body surface 131b side of the wick sheet 130, and is formed in a concave shape from the second main body surface 131b side. After completion of vapor chamber 100, injection channel 137 is in a sealed state.
- the injection channel 137 communicates with the steam channel portion 150 , and the working fluid 2 b is injected into the sealed space 103 through the injection channel 137 .
- the injection channel 137 may communicate with the liquid channel portion 160 depending on the arrangement of the liquid channel portion 160 .
- injection part 104 is provided on one side edge of a pair of edges in X direction of vapor chamber 100 , but the present invention is limited to this. can be placed in any position. Note that the injection part 104 may be formed in advance so as to protrude from one side edge of the vapor chamber 100 in the X direction.
- the liquid flow path section 160 is provided on the second body surface 131b of the wick sheet 130. As shown in FIGS. The liquid flow path portion 160 is configured so that the working liquid 2b mainly passes therethrough.
- the liquid channel portion 160 constitutes a part of the above-described sealed space 103 and communicates with the vapor channel portion 150 .
- the liquid flow path section 160 is configured as a capillary structure (wick) for transporting the working liquid 2b to the evaporation region SR.
- the liquid flow path portion 160 is provided on the second main body surface 131b of each land portion 133 of the wick sheet 130 .
- the liquid flow path portion 160 may be formed over the entire second body surface 131 b of each land portion 133 .
- the liquid flow path section 160 is an example of a groove aggregate including a plurality of grooves.
- the liquid flow path portion 160 has a plurality of main grooves 161 arranged parallel to each other through which the hydraulic fluid 2b passes, and a plurality of communication grooves 165 communicating with the main flow grooves 161 .
- the main groove 161 of the liquid flow path portion 160 is an example of a first groove.
- the communication groove 165 of the liquid flow path portion 160 is an example of a second groove.
- each land portion 133 includes six main grooves 161, but the present invention is not limited to this.
- the number of main grooves 161 included in each land portion 133 is arbitrary, and may be, for example, 3 or more and 20 or less.
- Each mainstream groove 161 is formed to extend along the longitudinal direction (X direction) of the land portion 133, as shown in FIG.
- the plurality of mainstream grooves 161 are arranged parallel to each other. Note that when the land portion 133 is curved in plan view, each main groove 161 may extend in a curved shape along the curved direction of the land portion 133 . That is, each mainstream groove 161 does not necessarily have to be formed linearly, and does not have to extend parallel to the X direction.
- the main groove 161 has a channel cross-sectional area smaller than that of the steam passage 151 of the steam channel portion 150 so that the working fluid 2b mainly flows by capillary action.
- the main groove 161 is configured to transport the working fluid 2b condensed from the working steam 2a to the evaporation region SR.
- the main grooves 161 are spaced apart from each other in the width direction (Y direction).
- the main groove 161 is formed by etching from the second main body surface 131b of the wick sheet 130 in an etching process to be described later.
- the mainstream groove 161 has a curved wall surface 162, as shown in FIG.
- the wall surface 162 defines the mainstream groove 161 and is curved in a shape that expands toward the first main body surface 131a. 42, the radius of curvature of each wall surface 162 may be smaller than the radius of curvature of the second wall surface 154a of the steam passage 151. As shown in FIG.
- the width w23 of the mainstream groove 161 may be, for example, 2 ⁇ m or more and 500 ⁇ m or less.
- the width w23 of the main groove 161 is the length in the direction perpendicular to the longitudinal direction of the land portion 133, in this case the dimension in the Y direction.
- the width w23 of the main groove 161 means the dimension on the second main body surface 131b.
- the depth h21 of the main groove 161 may be, for example, 3 ⁇ m or more and 300 ⁇ m or less.
- the depth h21 of the main groove 161 is the distance measured from the second main body surface 131b in the direction perpendicular to the second main body surface 131b, and in this case is the dimension in the Z direction.
- the depth h21 is the depth of the main groove 161 at the deepest point.
- each communication groove 165 extends in a direction different from the X direction.
- each communication groove 165 is formed to extend in the Y direction and perpendicular to the main groove 161 .
- Several communication grooves 165 are arranged so as to communicate the main grooves 161 adjacent to each other.
- Another communication groove 165 is arranged so as to communicate between the steam flow path portion 150 (steam passage 151 ) and the main groove 161 closest to the steam flow path portion 150 . That is, the communication groove 165 extends from the end of the land portion 133 in the Y direction to the main groove 161 adjacent to the end. In this manner, the steam passage 151 of the steam passage portion 150 and the main groove 161 are communicated with each other.
- the communication groove 165 has a channel cross-sectional area smaller than that of the steam passage 151 of the steam channel portion 150 so that the working fluid 2b mainly flows by capillary action.
- Each communication groove 165 may be arranged at equal intervals in the longitudinal direction (X direction) of the land portion 133 .
- the communication groove 165 is also formed by etching similarly to the main groove 161 and has a curved wall surface (not shown) similar to that of the main groove 161 .
- the width w24 (dimension in the X direction) of the communication groove 165 may be 5 ⁇ m or more and 300 ⁇ m or less.
- the depth of the communication groove 165 may be 3 ⁇ m or more and 300 ⁇ m or less.
- the main groove 161 includes an intersection 166 that communicates with the communication groove 165 .
- the main groove 161 and the communication groove 165 communicate with each other in a T-shape.
- the other side for example, the lower side in FIG. 43 communicates.
- the groove 165 It is possible to prevent the groove 165 from communicating with the main groove 161 .
- the wall surfaces 162 of the main groove 161 are not cut off on both sides in the Y direction at the crossing portion 166, and one wall surface 162 can remain.
- the working fluid 2b in the main groove 161 can be given a capillary action, and the driving force of the working fluid 2b toward the evaporation region SR can be suppressed from decreasing at the crossing portion 166.
- liquid projection rows 163 are provided between adjacent main grooves 161 of the liquid flow path section 160 .
- each land 133 includes seven rows of liquid projections 163, but the present invention is not limited to this.
- the number of liquid projection rows 163 included in each land portion 133 is arbitrary, and may be, for example, 3 rows or more and 20 rows or less.
- Each liquid projection row 163 is formed to extend along the longitudinal direction (X direction) of each land portion 133, as shown in FIG.
- the plurality of liquid projection rows 163 are arranged parallel to each other. Note that when the land portion 133 is curved in a plan view, each liquid convex portion row 163 may extend in a curved shape along the curved direction of the land portion 133 . That is, each liquid protrusion row 163 does not necessarily have to be formed in a straight line, and does not have to extend parallel to the X direction.
- the respective liquid convex portion rows 163 are arranged at intervals in the width direction (Y direction).
- Each liquid protrusion row 163 includes a plurality of protrusions 164 (liquid flow path protrusions) arranged in the X direction.
- the convex portion 164 is provided in the liquid flow path portion 160 , protrudes from the main groove 161 and the communication groove 165 and contacts the upper sheet 120 .
- Each projection 164 is formed in a rectangular shape in plan view so that the X direction is the longitudinal direction.
- the main grooves 161 are arranged between the protrusions 164 adjacent to each other in the Y direction.
- Communication grooves 165 are arranged between the protrusions 164 that are adjacent to each other in the X direction.
- the communication groove 165 is formed so as to extend in the Y direction, and communicates the main grooves 161 adjacent to each other in the Y direction. This allows the hydraulic fluid 2b to flow between these main grooves 161. As shown in FIG.
- the convex portion 164 is a portion where the material of the wick sheet 130 remains without being removed by etching in the etching process described later.
- the planar shape of the projection 164 is rectangular.
- the planar shape of the convex portion 164 corresponds to the shape of the wick sheet 130 at the position of the second main body surface 131b.
- the width w25 of the protrusion 164 may be, for example, 5 ⁇ m or more and 500 ⁇ m or less.
- the width w25 of the convex portion 164 is the value at the point where the width of the convex portion 164 is maximum.
- the arrangement pitch of the protrusions 164 in the width direction (Y direction) of the protrusions 164 may be, for example, 7 ⁇ m or more and 1000 ⁇ m or less.
- the arrangement pitch of the protrusions 164 is the distance between the center of the protrusion 164 in the Y direction and the center of the adjacent protrusion 164 in the Y direction, and is the distance measured in the Y direction.
- the convex portions 164 are arranged in a zigzag pattern (alternately). More specifically, the convex portions 164 of the liquid convex portion rows 163 that are adjacent to each other in the Y direction are arranged to be shifted from each other in the X direction. This shift amount may be half the arrangement pitch of the protrusions 164 in the X direction.
- the arrangement of the protrusions 164 is not limited to the zigzag pattern, and may be arranged in parallel. In this case, the convex portions 164 of the liquid convex portion rows 163 adjacent to each other in the Y direction are also aligned in the X direction.
- the length L1 of the protrusions 164 may be uniform between the protrusions 164 . Also, the length L1 of the projection 164 is longer than the width w24 of the communication groove 165 (L1>w24). The length L1 of the projection 164 corresponds to the dimension of the projection 164 in the X direction, and means the maximum dimension in the X direction of the second main body surface 131b.
- the materials forming the lower sheet 110, the upper sheet 120 and the wick sheet 130 are not particularly limited as long as they have good thermal conductivity.
- Lower sheet 110, upper sheet 120 and wick sheet 130 may comprise, for example, copper or a copper alloy.
- the thermal conductivity of each sheet 110, 120, 130 can be increased, and the heat dissipation efficiency of the vapor chamber 100 can be increased.
- corrosion can be prevented.
- These sheets 110, 120, and 130 may be made of other metal materials such as aluminum or titanium, or other metal alloy materials such as stainless steel, as long as the desired heat radiation efficiency can be obtained and corrosion can be prevented.
- the thickness t21 of the vapor chamber 100 shown in FIG. 37 may be, for example, 100 ⁇ m or more and 2000 ⁇ m or less.
- the thickness t21 of the vapor chamber 100 may be, for example, 100 ⁇ m or more and 2000 ⁇ m or less.
- the thickness t22 of the lower sheet 110 may be, for example, 25 ⁇ m or more and 500 ⁇ m or less. By setting the thickness t22 of the lower sheet 110 to 25 ⁇ m or more, the mechanical strength of the lower sheet 110 can be ensured. On the other hand, by setting the thickness t22 of the lower sheet 110 to 500 ⁇ m or less, it is possible to suppress the thickness t21 of the vapor chamber 100 from increasing. Similarly, the thickness t23 of the upper sheet 120 may be set similarly to the thickness t22 of the lower sheet 110. The thickness t23 of the upper sheet 120 and the thickness t22 of the lower sheet 110 may be different.
- the thickness t24 of the wick sheet 130 may be, for example, 50 ⁇ m or more and 1000 ⁇ m or less. By setting the thickness t24 of the wick sheet 130 to 50 ⁇ m or more, the vapor channel portion 150 can be properly secured, and the vapor chamber 100 can be properly operated. On the other hand, by setting the thickness to 1000 ⁇ m or less, it is possible to suppress the thickness t21 of the vapor chamber 100 from increasing.
- FIG. 44 to 46 show cross sections similar to the cross sectional view of FIG.
- a flat metal material sheet M including a lower surface Ma and an upper surface Mb is prepared.
- the metal material sheet M is etched from the lower surface Ma and the upper surface Mb to form the vapor channel portion 150 and the liquid channel portion 160 .
- a patterned resist film (not shown) is formed on the lower surface Ma and the upper surface Mb of the metal material sheet M by photolithography. Subsequently, the lower surface Ma and the upper surface Mb of the metal material sheet M are etched through the openings of the patterned resist film. As a result, the lower surface Ma and the upper surface Mb of the metal material sheet M are pattern-etched to form the vapor channel portion 150 and the liquid channel portion 160 as shown in FIG.
- a ferric chloride-based etchant such as a ferric chloride aqueous solution or a copper chloride-based etchant such as a copper chloride aqueous solution can be used.
- the etching may etch the lower surface Ma and the upper surface Mb of the metal material sheet M at the same time.
- the etching is not limited to this, and the etching of the lower surface Ma and the upper surface Mb may be performed as separate steps.
- the vapor channel portion 150 and the liquid channel portion 160 may be formed by etching at the same time, or may be formed by separate steps.
- etching step by etching the lower surface Ma and the upper surface Mb of the metal material sheet M, a predetermined contour shape as shown in FIGS. 40 and 41 is obtained. That is, the edges of the wick sheet 130 are formed.
- the lower sheet 110, the upper sheet 120 and the wick sheet 130 are bonded as shown in FIG.
- the lower sheet 110 and the upper sheet 120 may be formed of a rolled material having a desired thickness.
- the lower sheet 110, the wick sheet 130 and the upper sheet 120 are laminated in this order.
- the first main body surface 131a of the wick sheet 130 is overlaid on the second lower sheet surface 110b of the lower sheet 110, and the first upper sheet surface 120a of the upper sheet 120 is superimposed on the second main body surface 131b of the wick sheet 130. are superimposed.
- the sheets 110 , 120 , 130 are aligned using the alignment hole 112 of the lower sheet 110 , the alignment hole 135 of the wick sheet 130 , and the alignment hole 122 of the upper sheet 120 .
- the lower sheet 110, the wick sheet 130 and the upper sheet 120 are temporarily fixed.
- these sheets 110, 120, 130 may be tacked by spot resistance welding, and these sheets 110, 120, 130 may be tacked by laser welding.
- the lower sheet 110, the wick sheet 130, and the upper sheet 120 are then permanently bonded by diffusion bonding. More specifically, the first main body surface 131 a of the frame portion 132 and the land portions 133 of the wick sheet 130 is diffusion-bonded to the second lower sheet surface 110 b of the lower sheet 110 . Further, the second main body surface 131b of the frame portion 132 and the land portions 133 of the wick sheet 130 is diffusion-bonded to the first upper sheet surface 120a of the upper sheet 120 surface. In this manner, the sheets 110, 120, and 130 are diffusion-bonded to form a sealed space 103 having a vapor channel portion 150 and a liquid channel portion 160 between the lower sheet 110 and the upper sheet 120. be done.
- the working fluid 2b is injected from the injection part 104 into the sealed space 103 .
- the injection channel 137 described above is sealed.
- the injection section 104 may be partially melted to seal the injection channel 137 .
- communication between the sealed space 103 and the outside is cut off, and the hydraulic fluid 2b is enclosed in the sealed space 103, preventing the hydraulic fluid 2b in the sealed space 103 from leaking to the outside.
- the vapor chamber 100 according to the present embodiment is obtained.
- the vapor chamber 100 obtained as described above is installed in a housing H of an electronic device E such as a mobile terminal, and a device to be cooled such as a CPU is mounted on the second upper sheet surface 120b of the upper sheet 120.
- An electronic device D is attached.
- electronic device D is attached with vapor chamber 100 .
- the working fluid 2b in the sealed space 103 is pushed by the surface tension of the wall surfaces of the sealed space 103, that is, the first wall surface 153a and the second wall surface 154a of the steam passage 151, the wall surface 162 of the main groove 161 of the liquid flow path portion 160, and adhere to the wall surface of the communication groove 165 .
- the hydraulic fluid 2b may also adhere to the portion of the second lower seat surface 110b of the lower seat 110 exposed to the steam passage 151 . Furthermore, the hydraulic fluid 2b may also adhere to the portions of the first upper seat surface 120a of the upper seat 120 exposed to the steam passage 151, the main groove 161 and the communication groove 165. As shown in FIG.
- the working fluid 2b present in the evaporation region SR receives heat from the electronic device D.
- the received heat is absorbed as latent heat and the working fluid 2b evaporates (vaporizes) to generate the working steam 2a.
- Most of the generated working steam 2a diffuses within the steam passage 151 forming the sealed space 103 (see solid line arrows in FIG. 40).
- the working steam 2a in each steam passage 151 leaves the evaporating region SR, and most of the working steam 2a is transported to the relatively low temperature condensation region CR (the right part in FIGS. 40 and 41).
- the working steam 2a is mainly radiated to the lower sheet 110 and cooled.
- the heat received by the lower seat 110 from the working steam 2a is transferred to the outside air via the housing member Ha (see FIG. 37).
- the working steam 2a By radiating heat to the lower sheet 110 in the condensation area CR, the working steam 2a loses the latent heat absorbed in the evaporation area SR and condenses to produce the working fluid 2b.
- the generated hydraulic fluid 2b adheres to the first wall surface 153a and the second wall surface 154a of each steam passage 151, the second lower sheet surface 110b of the lower sheet 110, and the first upper sheet surface 120a of the upper sheet 120. .
- the working fluid 2b continues to evaporate in the evaporation region SR.
- the working fluid 2b in the area other than the evaporation area SR (that is, the condensation area CR) of the liquid flow path portion 160 is transported toward the evaporation area SR by the capillary action of each main groove 161 (see FIG. 40 (see dashed arrow in ).
- the working fluid 2b adhering to each of the steam passages 151, the second lower seat surface 110b and the first upper seat surface 120a moves to the fluid flow path portion 160, passes through the communication groove 165, and enters the main groove 161. enter.
- each main groove 161 and each communication groove 165 are filled with the hydraulic fluid 2b. Therefore, the working fluid 2b filled therein obtains a driving force toward the evaporation area SR due to the capillary action of each main groove 161, and is smoothly transported toward the evaporation area SR.
- each main groove 161 communicates with another adjacent main groove 161 via a corresponding communication groove 165.
- the hydraulic fluid 2b is prevented from flowing between the main grooves 161 adjacent to each other, and the occurrence of dryout in the main grooves 161 is suppressed. Therefore, the working fluid 2b in each main groove 161 is imparted with a capillary action, and the working fluid 2b is smoothly transported toward the evaporation region SR.
- the working fluid 2b that has reached the evaporation region SR receives heat from the electronic device D again and evaporates.
- the working steam 2a evaporated from the working fluid 2b passes through the communication groove 165 in the evaporation region SR, moves to the steam passage 151 having a large flow passage cross-sectional area, and diffuses in each steam passage 151.
- the working fluids 2a and 2b circulate in the sealed space 103 while repeating phase changes, that is, evaporation and condensation, to transport and release the heat of the electronic device D.
- FIG. As a result, the electronic device D is cooled.
- the working steam 2a generated from the working fluid 2b moves from the liquid flow path portion 160 toward the steam passage 151.
- the working steam 2 a flows from the main groove 161 into the steam passage 151 through the communication groove 165 adjacent to the protrusion 164 on the widthwise outer side of each liquid flow path portion 160 .
- the pressure gradient of the working steam 2a in the thickness direction (Z direction) is large in the portion of the steam passage 151 on the side of the second main body surface 131b, and the portion of the steam passage 151 on the side of the first main body surface 131a in the thickness direction.
- the pressure gradient of the working steam 2a in (Z direction) is small.
- the protrusion 155 is positioned closer to the second main body surface 131b than the intermediate position Pz between the first main body surface 131a and the second main body surface 131b.
- the pressure gradient in the vertical direction of the protrusion 155 increases in the vicinity of the protrusion 155.
- FIG. The pressure difference between the portion above and below the protrusion 155 can be large.
- the portion above the protrusion 155 corresponds to the portion on the second wall surface 154a side
- the portion below the protrusion 155 corresponds to the portion on the first wall surface 153a side. Therefore, the air pressure of the working steam 2a in the upper portion of the projection 155 can be made sufficiently higher than the air pressure of the working steam 2a in the lower portion of the projection 155, so that the working steam 2a can easily climb over the projection 155. can be done.
- the working steam 2a can be easily made to flow from the upper portion of the protrusion 155 to the lower portion.
- the projecting portion 155 is less likely to obstruct the passage of the working steam 2a, and the working steam 2a can be diffused smoothly from the projecting portion 155 toward the lower portion of the projecting portion 155.
- the first wall surface end portion 153b of the first wall surface 153a is positioned inside the steam flow path portion 150 relative to the projection portion 155 in plan view. Therefore, the first wall surface 153a is formed so as to face the inside of the steam passage 151 .
- the working steam 2a that has flowed from the upper portion to the lower portion of the protrusion 155 is guided inward in the width direction (Y direction) of the steam passage 151 along the first wall surface 153a.
- the working steam 2a is smoothly diffused inside the steam passage 151, and the cooling capacity of the vapor chamber 100 can be enhanced.
- the radius of curvature of the first wall surface 153a may gradually increase toward the first wall surface end 153b. Therefore, as the radius of curvature increases, obstacles to the flow of the working steam 2a toward the first main body surface 131a increase. Thereby, the diffusion of the working steam 2a inside the steam passage 151 can be performed more smoothly.
- the working fluid 2b generated from the working steam 2a moves from the steam passage 151 toward the liquid flow path portion 160.
- the working fluid 2 b passes through the communication groove 165 adjacent to the protrusion 164 on the widthwise outer side of each fluid flow path portion 160 and enters the main groove 161 .
- the first wall surface end portion 153b of the first wall surface 153a is positioned inside the steam flow path portion 150 relative to the projection portion 155 in plan view. Therefore, the working fluid 2b that has flowed through the steam passage 151 is guided to the fluid flow path portion 160 along the first wall surface 153a. As a result, the working fluid 2b smoothly enters the fluid flow path portion 160 . In addition, since the working fluid 2b can easily climb over the projections 155, the projections 155 are less likely to obstruct passage of the working fluid 2b, and the working fluid 2b flows smoothly from the projections 155 into the liquid flow path portion 160. It can be carried out.
- the protrusion 155 is positioned closer to the second main body surface 131b than the intermediate position Pz. Therefore, the radius of curvature of the second wall surface 154a can be made smaller than the radius of curvature of the first wall surface 153a. As a result, the capillary action of the second wall surface 154 a can be enhanced, and the working fluid 2 b can smoothly flow into the fluid flow path portion 160 . In addition, since the capillary action is enhanced, the holding action of the hydraulic fluid 2b by the second wall surface 154a can also be enhanced. Therefore, it is possible to increase the transport amount of the working fluid 2b to the evaporation region SR.
- the first wall surface end portion 153b of the first wall surface 153a is located inside the steam flow path portion 150 relative to the projection portion 155 in plan view, so that the width direction end portion of the land portion 133 It is easy to check the shape defect of the part in plan view.
- the first wall surface 153a is curved toward the liquid flow path portion 160, so that the volume of the vapor passage 151 is increased and the cooling capacity of the vapor chamber 100 is increased. can be done.
- the present invention is not limited to the above-described embodiments and modifications as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention at the implementation stage. Further, various inventions can be formed by appropriate combinations of the plurality of constituent elements disclosed in each of the above embodiments and modifications. Some components may be deleted from all the components shown in each embodiment and each modification.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
- Casings For Electric Apparatus (AREA)
Abstract
Description
作動流体が封入されるベーパーチャンバ用の本体シートであって、
第1本体面と、
前記第1本体面とは反対側に設けられた第2本体面と、
前記第1本体面から前記第2本体面に延びる貫通空間と、
前記第1本体面に設けられ、前記貫通空間に連通した複数の第1溝であって、第1方向に延びる複数の第1溝と、を備え、
前記貫通空間は、平面視において第1方向に延びており、
前記第1方向に垂直な断面で見たときに、前記貫通空間は、前記第1本体面に位置する第1開口部と、前記第2本体面に位置する第2開口部と、を有し、前記第2開口部は、前記第1開口部に平面視で重なる領域から、前記第1溝に平面視で重なる位置まで延びている、ベーパーチャンバ用の本体シート、
を提供する。
前記第1方向に垂直な断面で見たときに、前記貫通空間は、前記第1本体面に設けられた、前記第1開口部を画定する第1空間凹部と、前記第2本体面に設けられた、前記第2開口部を画定する第2空間凹部であって、前記第1空間凹部と連通する第2空間凹部と、を有し、
前記第1空間凹部は、凹状に湾曲した一対の第1壁面を含み、
前記第2空間凹部は、凹状に湾曲した一対の第2壁面を含み、
互いに対応する前記第1壁面と前記第2壁面が、前記貫通空間の内側に向かって突出する壁面突出部で接続され、
前記第1方向に垂直な断面で見たときに、前記第2空間凹部は、互いに対応する前記第2壁面と前記壁面突出部を接続する、平坦状に形成された平坦面を含む、
ようにしてもよい。
前記第1方向に垂直な断面で見たときに、前記貫通空間は、前記第1本体面に設けられた、前記第1開口部を画定する第1空間凹部と、前記第2本体面に設けられた、前記第2開口部を画定する第2空間凹部であって、前記第1空間凹部と連通する第2空間凹部と、を有し、
前記第1空間凹部は、凹状に湾曲した一対の第1壁面を含み、
前記第2空間凹部は、凹状に湾曲した一対の第2壁面を含み、
互いに対応する前記第1壁面と前記第2壁面が、前記貫通空間の内側に向かって突出する壁面突出部で接続され、
前記第1方向に垂直な断面で見たときに、前記第2空間凹部は、互いに対応する前記第2壁面と前記壁面突出部を接続する凸部面を含み、
前記凸部面は、前記第1方向に延びるとともに前記第2本体面に向かって突出する空間凸部を含む、
ようにしてもよい。
前記凸部面は、互いに離間した複数の前記空間凸部を含む、
ようにしてもよい。
前記第1方向に垂直な断面で見たときに、前記貫通空間は、前記第1本体面に設けられた、前記第1開口部を画定する第1空間凹部と、前記第2本体面に設けられた、前記第2開口部を画定する第2空間凹部であって、前記第1空間凹部と連通する第2空間凹部と、を有し、
前記第1空間凹部は、凸状に湾曲した一対の第1壁面を含み、
前記第2空間凹部は、凹状に湾曲した一対の第2壁面を含む、
ようにしてもよい。
前記第1方向に垂直な断面で見たときに、前記第2開口部は、前記第1開口部に平面視で重なる領域から、前記第1開口部に対して両側で、前記第1溝に平面視で重なる位置まで延びている、
ようにしてもよい。
平面視において枠状に形成され、前記第1本体面から前記第2本体面に延びる枠体部であって、前記貫通空間を画定する枠体部と、
前記枠体部の内側に設けられたランド部であって、前記第1方向に延びるとともに前記第1本体面から前記第2本体面に延びるランド部と、を備え、
前記第1開口部および前記第2開口部は、前記枠体部と前記ランド部との間に位置し、
前記ランド部の前記第1本体面に前記第1溝が位置し、
前記第1方向に垂直な断面で見たときに、前記第2開口部は、前記第1開口部に平面視で重なる領域から、前記ランド部に位置する前記第1溝に平面視で重なる位置まで延びるとともに、前記第1開口部よりも前記枠体部の外側に向かって延びている、
ようにしてもよい。
作動流体が封入されるベーパーチャンバ用の本体シートであって、
第1本体面と、
前記第1本体面とは反対側に設けられた第2本体面と、
前記第1本体面から前記第2本体面に延びる貫通空間と、を備え、
前記貫通空間は、平面視において第1方向に延びており、
前記第1方向に垂直な断面で見たときに、前記貫通空間は、前記第1本体面に設けられた第1空間凹部と、前記第2本体面に設けられた、前記第1空間凹部と連通する第2空間凹部と、を有し、
前記第1空間凹部は、一対の第1壁面を含み、
前記第2空間凹部は、一対の第2壁面を含み、
前記第1空間凹部の一方の前記第1壁面と、前記第2空間凹部の対応する前記第2壁面とが第1壁面突出部で接続され、
前記第1壁面突出部は、前記貫通空間の内側に向かって突出し、
前記第1壁面突出部は、前記第1本体面の法線方向において、前記第1本体面と前記第2本体面との間の中間位置に対してずれて配置され、
前記第1空間凹部の前記第1壁面突出部とは反対側に位置する前記第1壁面および前記第2空間凹部の対応する前記第2壁面は、前記第1壁面から前記第2壁面にわたって連続して凹状に形成されている、ベーパーチャンバ用の本体シート、
を提供する。
前記貫通空間は、前記第1本体面に位置する、前記第1空間凹部によって画定された第1開口部と、前記第2本体面に位置する、前記第2空間凹部によって画定された第2開口部と、を有し、
前記第1方向に垂直な断面で見たときに、前記第1開口部の中心は、前記第2開口部の中心に対してずれて配置されている、
ようにしてもよい。
作動流体が封入されるベーパーチャンバ用の本体シートであって、
第1本体面と、
前記第1本体面とは反対側に設けられた第2本体面と、
前記第1本体面から前記第2本体面に延びる貫通空間と、を備え、
前記貫通空間は、平面視において第1方向に延びており、
前記第1方向に垂直な断面で見たときに、前記貫通空間は、前記第1本体面に設けられた第1空間凹部と、前記第2本体面に設けられた、前記第1空間凹部と連通する第2空間凹部と、を有し、
前記第1空間凹部は、一対の第1壁面を含み、
前記第2空間凹部は、一対の第2壁面を含み、
前記第1空間凹部の一方の前記第1壁面と、前記第2空間凹部の対応する前記第2壁面とが第1壁面突出部で接続され、
前記第1壁面突出部は、前記貫通空間の内側に向かって突出し、
前記第1壁面突出部は、前記第1本体面の法線方向において、前記第1本体面と前記第2本体面との間の中間位置に対してずれて配置され、
前記貫通空間は、前記第1本体面に位置する、前記第1空間凹部によって画定された第1開口部と、前記第2本体面に位置する、前記第2空間凹部によって画定された第2開口部と、を有し、
前記第1方向に垂直な断面で見たときに、前記第1開口部の中心は、前記第2開口部の中心に対してずれて配置されている、ベーパーチャンバ用の本体シート、
を提供する。
平面視において枠状に形成された枠体部と、
前記枠体部の内側に設けられたランド部であって、前記第1方向に延びて、前記枠体部との間に前記貫通空間を画定するランド部と、を更に備え、
前記ランド部の幅をw1としたときに、前記第1開口部の中心と前記第2開口部の中心のずれ量は、0.05mm~(0.8×w1)mmである、
ようにしてもよい。
前記第1本体面に設けられた、前記貫通空間に連通した複数の第1溝を更に備え、
前記第1壁面突出部は、前記中間位置よりも前記第1本体面の近くに配置されている、
ようにしてもよい。
前記第1空間凹部の前記第1壁面突出部とは反対側に位置する前記第1壁面と、前記第2空間凹部の対応する前記第2壁面とが第2壁面突出部で接続され、
前記第2壁面突出部は、前記貫通空間の内側に向かって突出し、
前記第2壁面突出部は、前記法線方向において、前記第1本体面と前記第2本体面との間の中間位置に対してずれて配置されている、
ようにしてもよい。
前記第2壁面突出部は、前記中間位置よりも前記第1本体面の近くに配置されている、
ようにしてもよい。
作動流体が封入されるベーパーチャンバ用の本体シートであって、
第1本体面と、
前記第1本体面とは反対側に設けられた第2本体面と、
前記第1本体面から前記第2本体面に延びる貫通空間と、を備え、
前記貫通空間は、平面視において第1方向に延びており、
前記第1方向に垂直な断面で見たときに、前記貫通空間は、前記第1本体面に設けられた第1空間凹部と、第2本体面に設けられた、前記第1空間凹部と連通する第2空間凹部と、前記第2本体面に設けられた第3空間凹部であって、前記第2空間凹部の両側に位置するとともに、当該第2空間凹部に連通する第3空間凹部と、を有し、
前記第2空間凹部は、一対の第2壁面を含み、
前記第3空間凹部は、第3壁面を含み、
前記第2空間凹部の前記第2壁面の各々と、対応する前記第3空間凹部の前記第3壁面とが第3壁面突出部で接続され、
前記第3壁面突出部が、前記第2本体面に向かって突出している、ベーパーチャンバ用の本体シート、
を提供する。
前記第1空間凹部は、一対の第1壁面を含み、
前記第1空間凹部の一方の前記第1壁面と、前記第2空間凹部の対応する前記第2壁面とが第1壁面突出部で接続され、
前記第1壁面突出部は、前記貫通空間の内側に向かって突出し、
前記第1壁面突出部は、前記第1本体面の法線方向において、前記第1本体面と前記第2本体面との間の中間位置に対してずれて配置されている、
ようにしてもよい。
前記第1本体面に設けられた、前記貫通空間に連通した複数の第1溝を更に備え、
前記第1壁面突出部は、前記中間位置よりも前記第1本体面の近くに配置されている、
ようにしてもよい。
前記第1空間凹部の前記第1壁面突出部とは反対側に位置する前記第1壁面と、前記第2空間凹部の対応する前記第2壁面とが第2壁面突出部で接続され、
前記第2壁面突出部は、前記貫通空間の内側に向かって突出し、
前記第2壁面突出部は、前記法線方向において、前記第1本体面と前記第2本体面との間の中間位置に対してずれて配置されている、
ようにしてもよい。
前記第2壁面突出部は、前記中間位置よりも前記第1本体面の近くに配置されている、
ようにしてもよい。
前記第1空間凹部の前記第1壁面突出部とは反対側に位置する前記第1壁面および前記第2空間凹部の対応する前記第2壁面は、前記第1壁面から前記第2壁面にわたって連続して凹状に形成されている、
ようにしてもよい。
前記貫通空間は、前記第1本体面に位置する、前記第1空間凹部によって画定された第1開口部と、前記第2本体面に位置する、前記第2空間凹部によって画定された第2開口部と、を有し、
前記第1方向に垂直な断面で見たときに、前記第1開口部の中心は、前記第2開口部の中心に対してずれて配置されている、
ようにしてもよい。
平面視において枠状に形成された枠体部と、
前記枠体部の内側に設けられたランド部であって、前記第1方向に延びて、前記枠体部との間に前記貫通空間を画定するランド部と、を更に備え、
前記ランド部の幅をw1としたときに、前記第1開口部の中心と前記第2開口部の中心のずれ量は、0.05mm~(0.8×w1)mmである、
ようにしてもよい。
ベーパーチャンバ用の本体シートであって、
第1本体面と、
前記第1本体面とは反対側に位置する第2本体面と、
前記第1本体面と前記第2本体面とを貫通する貫通空間と、
前記第2本体面に設けられ、前記貫通空間と連通した複数の第1溝と、を備え、
前記貫通空間は、前記第1本体面の側に位置する湾曲状の第1壁面と、前記第2本体面の側に位置する湾曲状の第2壁面とを有し、
前記第1壁面および前記第2壁面は、前記貫通空間の内側に張り出すように形成された突起部において合流し、
前記突起部は、前記第1本体面と前記第2本体面との中間位置よりも前記第2本体面の近くに位置し、
前記第1壁面は、前記第1本体面の側に第1壁面端部を有し、
前記第1壁面端部は、平面視で、前記突起部よりも前記貫通空間の内側に位置する、ベーパーチャンバ用の本体シート、
を提供する。
前記第2壁面は、前記第2本体面の側に第2壁面端部を有し、
前記貫通空間の幅方向における前記第2壁面端部と前記突起部との距離をLpとし、前記第2壁面端部と前記第1壁面端部との距離をLsとしたとき、距離Lsは、距離Lpの1.05倍以上2倍以下である、
ようにしてもよい。
複数の前記第1溝は、互いに並列配置され、
互いに隣り合う前記第1溝の間に、凸部列が設けられ、
前記凸部列の各々は、複数の凸部を有し、
前記第2壁面は、前記第2本体面の側に第2壁面端部を有し、
前記第2壁面端部と前記第1壁面端部との距離をLsとしたとき、距離Lsは、前記凸部の幅の1.1倍以上10倍以下である、
ようにしてもよい。
第1シートと、
第2シートと、
前記第1シートと前記第2シートとの間に介在された、第1の解決手段から第6の解決手段のそれぞれによるベーパーチャンバ用の本体シートと、を備えた、ベーパーチャンバ、
を提供する。
作動流体が封入されたベーパーチャンバであって、
第1シートと、
第2シートと、
前記第1シートと前記第2シートとの間に介在されたベーパーチャンバ用の本体シートと、を備え、
前記本体シートは、
第1本体面と、
前記第1本体面とは反対側に位置する第2本体面と、
前記第1本体面と前記第2本体面とを貫通する貫通空間と、
前記第2本体面に設けられ、前記貫通空間と連通した複数の第1溝と、を有し、
前記貫通空間は、前記第1本体面の側に位置する湾曲状の第1壁面と、前記第2本体面の側に位置する湾曲状の第2壁面とを有し、
前記第1壁面および前記第2壁面は、前記貫通空間の内側に張り出すように形成された突起部において合流し、
前記突起部は、前記第1本体面と前記第2本体面との中間位置よりも前記第2本体面の近くに位置し、
前記第1壁面は、前記第1本体面の側に第1壁面端部を有し、
前記第1壁面端部は、平面視で、前記突起部よりも前記貫通空間の内側に位置する、ベーパーチャンバ、
を提供する。
前記第2壁面は、前記第2本体面の側に第2壁面端部を有し、
前記貫通空間の幅方向における前記第2壁面端部と前記突起部との距離をLpとし、前記第2壁面端部と前記第1壁面端部との距離をLsとしたとき、距離Lsは、距離Lpの1.05倍以上2倍以下である、
ようにしてもよい。
複数の前記第1溝は、互いに並列配置され、
互いに隣り合う前記第1溝の間に、凸部列が設けられ、
前記凸部列の各々は、複数の凸部を有し、
前記第2壁面は、前記第2本体面の側に第2壁面端部を有し、
前記第2壁面端部と前記第1壁面端部との距離をLsとしたとき、距離Lsは、前記凸部の幅の1.1倍以上10倍以下である、
ようにしてもよい。
ハウジングと、
前記ハウジング内に収容された電子デバイスと、
前記電子デバイスに熱的に接触した第6の解決手段または第7の解決手段によるベーパーチャンバと、を備えた、電子機器、
を提供する。
図1~図15Bを用いて、本発明の第1の実施の形態におけるベーパーチャンバ用の本体シート、ベーパーチャンバおよび電子機器について説明する。本実施の形態におけるベーパーチャンバ1は、発熱を伴う電子デバイスDとともに電子機器EのハウジングHに収容されており、電子デバイスDを冷却するための装置である。電子機器Eの例としては、携帯端末およびタブレット端末等のモバイル端末等が挙げられる。電子デバイスDの例としては、中央演算処理装置(CPU)、発光ダイオード(LED)およびパワー半導体等が挙げられる。電子デバイスDは、被冷却装置と称する場合もある。
次に、図16~図25を用いて、本発明の第2の実施の形態におけるベーパーチャンバ用の本体シート、ベーパーチャンバおよび電子機器について説明する。
次に、図26~図35を用いて、本発明の第3の実施の形態におけるベーパーチャンバ用の本体シート、ベーパーチャンバおよび電子機器について説明する。
次に、図36~図47を用いて、本発明の第4の実施の形態におけるベーパーチャンバ用の本体シート、ベーパーチャンバおよび電子機器について説明する。
Claims (20)
- 作動流体が封入されるベーパーチャンバ用の本体シートであって、
第1本体面と、
前記第1本体面とは反対側に設けられた第2本体面と、
前記第1本体面から前記第2本体面に延びる貫通空間と、
前記第1本体面に設けられ、前記貫通空間に連通した複数の第1溝であって、第1方向に延びる複数の第1溝と、を備え、
前記貫通空間は、平面視において第1方向に延びており、
前記第1方向に垂直な断面で見たときに、前記貫通空間は、前記第1本体面に位置する第1開口部と、前記第2本体面に位置する第2開口部と、を有し、前記第2開口部は、前記第1開口部に平面視で重なる領域から、前記第1溝に平面視で重なる位置まで延びている、ベーパーチャンバ用の本体シート。 - 前記第1方向に垂直な断面で見たときに、前記貫通空間は、前記第1本体面に設けられた、前記第1開口部を画定する第1空間凹部と、前記第2本体面に設けられた、前記第2開口部を画定する第2空間凹部であって、前記第1空間凹部と連通する第2空間凹部と、を有し、
前記第1空間凹部は、凹状に湾曲した一対の第1壁面を含み、
前記第2空間凹部は、凹状に湾曲した一対の第2壁面を含み、
互いに対応する前記第1壁面と前記第2壁面が、前記貫通空間の内側に向かって突出する壁面突出部で接続され、
前記第1方向に垂直な断面で見たときに、前記第2空間凹部は、互いに対応する前記第2壁面と前記壁面突出部を接続する、平坦状に形成された平坦面を含む、請求項1に記載のベーパーチャンバ用の本体シート。 - 前記第1方向に垂直な断面で見たときに、前記貫通空間は、前記第1本体面に設けられた、前記第1開口部を画定する第1空間凹部と、前記第2本体面に設けられた、前記第2開口部を画定する第2空間凹部であって、前記第1空間凹部と連通する第2空間凹部と、を有し、
前記第1空間凹部は、凹状に湾曲した一対の第1壁面を含み、
前記第2空間凹部は、凹状に湾曲した一対の第2壁面を含み、
互いに対応する前記第1壁面と前記第2壁面が、前記貫通空間の内側に向かって突出する壁面突出部で接続され、
前記第1方向に垂直な断面で見たときに、前記第2空間凹部は、互いに対応する前記第2壁面と前記壁面突出部を接続する凸部面を含み、
前記凸部面は、前記第1方向に延びるとともに前記第2本体面に向かって突出する空間凸部を含む、請求項1に記載のベーパーチャンバ用の本体シート。 - 前記凸部面は、互いに離間した複数の前記空間凸部を含む、請求項3に記載のベーパーチャンバ用の本体シート。
- 前記第1方向に垂直な断面で見たときに、前記貫通空間は、前記第1本体面に設けられた、前記第1開口部を画定する第1空間凹部と、前記第2本体面に設けられた、前記第2開口部を画定する第2空間凹部であって、前記第1空間凹部と連通する第2空間凹部と、を有し、
前記第1空間凹部は、凸状に湾曲した一対の第1壁面を含み、
前記第2空間凹部は、凹状に湾曲した一対の第2壁面を含む、請求項1に記載のベーパーチャンバ用の本体シート。 - 前記第1方向に垂直な断面で見たときに、前記第2開口部は、前記第1開口部に平面視で重なる領域から、前記第1開口部に対して両側で、前記第1溝に平面視で重なる位置まで延びている、請求項1~5のいずれか一項に記載のベーパーチャンバ用の本体シート。
- 平面視において枠状に形成され、前記第1本体面から前記第2本体面に延びる枠体部であって、前記貫通空間を画定する枠体部と、
前記枠体部の内側に設けられたランド部であって、前記第1方向に延びるとともに前記第1本体面から前記第2本体面に延びるランド部と、を備え、
前記第1開口部および前記第2開口部は、前記枠体部と前記ランド部との間に位置し、
前記ランド部の前記第1本体面に前記第1溝が位置し、
前記第1方向に垂直な断面で見たときに、前記第2開口部は、前記第1開口部に平面視で重なる領域から、前記ランド部に位置する前記第1溝に平面視で重なる位置まで延びるとともに、前記第1開口部よりも前記枠体部の外側に向かって延びている、請求項1~6のいずれか一項に記載のベーパーチャンバ用の本体シート。 - 作動流体が封入されるベーパーチャンバ用の本体シートであって、
第1本体面と、
前記第1本体面とは反対側に設けられた第2本体面と、
前記第1本体面から前記第2本体面に延びる貫通空間と、を備え、
前記貫通空間は、平面視において第1方向に延びており、
前記第1方向に垂直な断面で見たときに、前記貫通空間は、前記第1本体面に設けられた第1空間凹部と、前記第2本体面に設けられた、前記第1空間凹部と連通する第2空間凹部と、を有し、
前記第1空間凹部は、一対の第1壁面を含み、
前記第2空間凹部は、一対の第2壁面を含み、
前記第1空間凹部の一方の前記第1壁面と、前記第2空間凹部の対応する前記第2壁面とが第1壁面突出部で接続され、
前記第1壁面突出部は、前記貫通空間の内側に向かって突出し、
前記第1壁面突出部は、前記第1本体面の法線方向において、前記第1本体面と前記第2本体面との間の中間位置に対してずれて配置され、
前記第1空間凹部の前記第1壁面突出部とは反対側に位置する前記第1壁面および前記第2空間凹部の対応する前記第2壁面は、前記第1壁面から前記第2壁面にわたって連続して凹状に形成されている、ベーパーチャンバ用の本体シート。 - 前記貫通空間は、前記第1本体面に位置する、前記第1空間凹部によって画定された第1開口部と、前記第2本体面に位置する、前記第2空間凹部によって画定された第2開口部と、を有し、
前記第1方向に垂直な断面で見たときに、前記第1開口部の中心は、前記第2開口部の中心に対してずれて配置されている、請求項8に記載のベーパーチャンバ用の本体シート。 - 作動流体が封入されるベーパーチャンバ用の本体シートであって、
第1本体面と、
前記第1本体面とは反対側に設けられた第2本体面と、
前記第1本体面から前記第2本体面に延びる貫通空間と、を備え、
前記貫通空間は、平面視において第1方向に延びており、
前記第1方向に垂直な断面で見たときに、前記貫通空間は、前記第1本体面に設けられた第1空間凹部と、前記第2本体面に設けられた、前記第1空間凹部と連通する第2空間凹部と、を有し、
前記第1空間凹部は、一対の第1壁面を含み、
前記第2空間凹部は、一対の第2壁面を含み、
前記第1空間凹部の一方の前記第1壁面と、前記第2空間凹部の対応する前記第2壁面とが第1壁面突出部で接続され、
前記第1壁面突出部は、前記貫通空間の内側に向かって突出し、
前記第1壁面突出部は、前記第1本体面の法線方向において、前記第1本体面と前記第2本体面との間の中間位置に対してずれて配置され、
前記貫通空間は、前記第1本体面に位置する、前記第1空間凹部によって画定された第1開口部と、前記第2本体面に位置する、前記第2空間凹部によって画定された第2開口部と、を有し、
前記第1方向に垂直な断面で見たときに、前記第1開口部の中心は、前記第2開口部の中心に対してずれて配置されている、ベーパーチャンバ用の本体シート。 - 平面視において枠状に形成された枠体部と、
前記枠体部の内側に設けられたランド部であって、前記第1方向に延びて、前記枠体部との間に前記貫通空間を画定するランド部と、を更に備え、
前記ランド部の幅をw1としたときに、前記第1開口部の中心と前記第2開口部の中心のずれ量は、0.05mm~(0.8×w1)mmである、請求項9または10に記載のベーパーチャンバ用の本体シート。 - 前記第1本体面に設けられた、前記貫通空間に連通した複数の第1溝を更に備え、
前記第1壁面突出部は、前記中間位置よりも前記第1本体面の近くに配置されている、請求項8~11のいずれか一項に記載のベーパーチャンバ用の本体シート。 - 前記第1空間凹部の前記第1壁面突出部とは反対側に位置する前記第1壁面と、前記第2空間凹部の対応する前記第2壁面とが第2壁面突出部で接続され、
前記第2壁面突出部は、前記貫通空間の内側に向かって突出し、
前記第2壁面突出部は、前記法線方向において、前記第1本体面と前記第2本体面との間の中間位置に対してずれて配置されている、請求項12に記載のベーパーチャンバ用の本体シート。 - 前記第2壁面突出部は、前記中間位置よりも前記第1本体面の近くに配置されている、請求項13に記載のベーパーチャンバ用の本体シート。
- 作動流体が封入されるベーパーチャンバ用の本体シートであって、
第1本体面と、
前記第1本体面とは反対側に設けられた第2本体面と、
前記第1本体面から前記第2本体面に延びる貫通空間と、を備え、
前記貫通空間は、平面視において第1方向に延びており、
前記第1方向に垂直な断面で見たときに、前記貫通空間は、前記第1本体面に設けられた第1空間凹部と、第2本体面に設けられた、前記第1空間凹部と連通する第2空間凹部と、前記第2本体面に設けられた第3空間凹部であって、前記第2空間凹部の両側に位置するとともに、当該第2空間凹部に連通する第3空間凹部と、を有し、
前記第2空間凹部は、一対の第2壁面を含み、
前記第3空間凹部は、第3壁面を含み、
前記第2空間凹部の前記第2壁面の各々と、対応する前記第3空間凹部の前記第3壁面とが第3壁面突出部で接続され、
前記第3壁面突出部が、前記第2本体面に向かって突出している、ベーパーチャンバ用の本体シート。 - ベーパーチャンバ用の本体シートであって、
第1本体面と、
前記第1本体面とは反対側に位置する第2本体面と、
前記第1本体面と前記第2本体面とを貫通する貫通空間と、
前記第2本体面に設けられ、前記貫通空間と連通した複数の第1溝と、を備え、
前記貫通空間は、前記第1本体面の側に位置する湾曲状の第1壁面と、前記第2本体面の側に位置する湾曲状の第2壁面とを有し、
前記第1壁面および前記第2壁面は、前記貫通空間の内側に張り出すように形成された突起部において合流し、
前記突起部は、前記第1本体面と前記第2本体面との中間位置よりも前記第2本体面の近くに位置し、
前記第1壁面は、前記第1本体面の側に第1壁面端部を有し、
前記第1壁面端部は、平面視で、前記突起部よりも前記貫通空間の内側に位置する、ベーパーチャンバ用の本体シート。 - 前記第2壁面は、前記第2本体面の側に第2壁面端部を有し、
前記貫通空間の幅方向における前記第2壁面端部と前記突起部との距離をLpとし、前記第2壁面端部と前記第1壁面端部との距離をLsとしたとき、距離Lsは、距離Lpの1.05倍以上2倍以下である、請求項16に記載のベーパーチャンバ用の本体シート。 - 複数の前記第1溝は、互いに並列配置され、
互いに隣り合う前記第1溝の間に、凸部列が設けられ、
前記凸部列の各々は、複数の凸部を有し、
前記第2壁面は、前記第2本体面の側に第2壁面端部を有し、
前記第2壁面端部と前記第1壁面端部との距離をLsとしたとき、距離Lsは、前記凸部の幅の1.1倍以上10倍以下である、請求項16に記載のベーパーチャンバ用の本体シート。 - 第1シートと、
第2シートと、
前記第1シートと前記第2シートとの間に介在された、請求項1~18のいずれか一項に記載のベーパーチャンバ用の本体シートと、を備えた、ベーパーチャンバ。 - ハウジングと、
前記ハウジング内に収容された電子デバイスと、
前記電子デバイスに熱的に接触した、請求項19に記載のベーパーチャンバと、を備えた、電子機器。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202280011809.7A CN116745573A (zh) | 2021-02-03 | 2022-02-02 | 蒸发室用的主体片材、蒸发室以及电子设备 |
US18/275,632 US20240125559A1 (en) | 2021-02-03 | 2022-02-02 | Body sheet for vapor chamber, vapor chamber, and electronic apparatus |
KR1020237028669A KR20230137960A (ko) | 2021-02-03 | 2022-02-02 | 베이퍼 챔버용 본체 시트, 베이퍼 챔버 및 전자 기기 |
JP2022579590A JPWO2022168891A1 (ja) | 2021-02-03 | 2022-02-02 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021015977 | 2021-02-03 | ||
JP2021-015966 | 2021-02-03 | ||
JP2021-015977 | 2021-02-03 | ||
JP2021015966 | 2021-02-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022168891A1 true WO2022168891A1 (ja) | 2022-08-11 |
Family
ID=82742229
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2022/004135 WO2022168891A1 (ja) | 2021-02-03 | 2022-02-02 | ベーパーチャンバ用の本体シート、ベーパーチャンバおよび電子機器 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20240125559A1 (ja) |
JP (1) | JPWO2022168891A1 (ja) |
KR (1) | KR20230137960A (ja) |
TW (1) | TW202246720A (ja) |
WO (1) | WO2022168891A1 (ja) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019088301A1 (ja) * | 2017-11-06 | 2019-05-09 | 大日本印刷株式会社 | ベーパーチャンバ、電子機器、ベーパーチャンバ用シート、並びに、ベーパーチャンバ用シート及びベーパーチャンバの製造方法 |
JP2019143960A (ja) * | 2017-11-10 | 2019-08-29 | 大日本印刷株式会社 | ベーパーチャンバ、電子機器、ベーパーチャンバ用金属シートおよびベーパーチャンバの製造方法 |
JP2020038051A (ja) * | 2018-08-31 | 2020-03-12 | 大日本印刷株式会社 | ベーパーチャンバー、電子機器 |
US20200100390A1 (en) * | 2018-09-20 | 2020-03-26 | Samsung Electronics Co., Ltd. | Heat dissipation device formed of nonmetallic material and electronic device including the same |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4823994B2 (ja) | 2002-05-08 | 2011-11-24 | 古河電気工業株式会社 | 薄型シート状ヒートパイプ |
JP6057952B2 (ja) | 2014-07-09 | 2017-01-11 | 東芝ホームテクノ株式会社 | シート型ヒートパイプ |
-
2022
- 2022-02-02 JP JP2022579590A patent/JPWO2022168891A1/ja active Pending
- 2022-02-02 US US18/275,632 patent/US20240125559A1/en active Pending
- 2022-02-02 KR KR1020237028669A patent/KR20230137960A/ko unknown
- 2022-02-02 WO PCT/JP2022/004135 patent/WO2022168891A1/ja active Application Filing
- 2022-02-07 TW TW111104331A patent/TW202246720A/zh unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019088301A1 (ja) * | 2017-11-06 | 2019-05-09 | 大日本印刷株式会社 | ベーパーチャンバ、電子機器、ベーパーチャンバ用シート、並びに、ベーパーチャンバ用シート及びベーパーチャンバの製造方法 |
JP2019143960A (ja) * | 2017-11-10 | 2019-08-29 | 大日本印刷株式会社 | ベーパーチャンバ、電子機器、ベーパーチャンバ用金属シートおよびベーパーチャンバの製造方法 |
JP2020038051A (ja) * | 2018-08-31 | 2020-03-12 | 大日本印刷株式会社 | ベーパーチャンバー、電子機器 |
US20200100390A1 (en) * | 2018-09-20 | 2020-03-26 | Samsung Electronics Co., Ltd. | Heat dissipation device formed of nonmetallic material and electronic device including the same |
Also Published As
Publication number | Publication date |
---|---|
JPWO2022168891A1 (ja) | 2022-08-11 |
US20240125559A1 (en) | 2024-04-18 |
TW202246720A (zh) | 2022-12-01 |
KR20230137960A (ko) | 2023-10-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP7137783B2 (ja) | ベーパーチャンバ用のウィックシート、ベーパーチャンバおよびベーパーチャンバの製造方法 | |
JP7315121B1 (ja) | ベーパーチャンバ、電子機器およびベーパーチャンバの製造方法 | |
JP7284944B2 (ja) | ベーパーチャンバおよび電子機器 | |
JP6856827B1 (ja) | ベーパーチャンバ用のウィックシート、ベーパーチャンバおよび電子機器 | |
JP7148889B2 (ja) | ベーパーチャンバ、電子機器およびベーパーチャンバ用金属シート | |
JP2019086280A (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 | |
WO2022168801A1 (ja) | ベーパーチャンバ、ベーパーチャンバ用のウィックシート及び電子機器 | |
JP7167416B2 (ja) | ベーパーチャンバ、ベーパーチャンバ用金属シートおよびベーパーチャンバの製造方法 | |
JP2021110476A (ja) | ベーパーチャンバ用のウィックシート、ベーパーチャンバおよび電子機器 | |
WO2022168891A1 (ja) | ベーパーチャンバ用の本体シート、ベーパーチャンバおよび電子機器 | |
WO2021070544A1 (ja) | ベーパーチャンバ用のウィックシート、ベーパーチャンバおよび電子機器 | |
WO2021141110A1 (ja) | ベーパーチャンバ用のウィックシート、ベーパーチャンバおよび電子機器 | |
JP2021188798A (ja) | ベーパーチャンバおよび電子機器 | |
WO2023106285A1 (ja) | ベーパーチャンバおよび電子機器 | |
JP2018179388A (ja) | ベーパーチャンバおよびベーパーチャンバ用金属シート | |
WO2023085401A1 (ja) | ベーパーチャンバ、電子機器およびベーパーチャンバ用の本体シート | |
CN116745573A (zh) | 蒸发室用的主体片材、蒸发室以及电子设备 | |
WO2022230749A1 (ja) | ベーパーチャンバ、ベーパーチャンバ用のウィックシート及び電子機器 | |
WO2022191240A1 (ja) | ベーパーチャンバ、ベーパーチャンバ用のウィックシート及び電子機器 | |
JP7477039B2 (ja) | ベーパーチャンバ用の本体シート、ベーパーチャンバおよび電子機器 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22749762 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2022579590 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202280011809.7 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18275632 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 20237028669 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 22749762 Country of ref document: EP Kind code of ref document: A1 |