US20150101785A1 - Heat dissipation device and a method for manufacturing same - Google Patents
Heat dissipation device and a method for manufacturing same Download PDFInfo
- Publication number
- US20150101785A1 US20150101785A1 US14/512,546 US201414512546A US2015101785A1 US 20150101785 A1 US20150101785 A1 US 20150101785A1 US 201414512546 A US201414512546 A US 201414512546A US 2015101785 A1 US2015101785 A1 US 2015101785A1
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- United States
- Prior art keywords
- recesses
- copper sheet
- adhesive
- heat dissipation
- dissipation device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 230000017525 heat dissipation Effects 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 14
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 93
- 229910052802 copper Inorganic materials 0.000 claims abstract description 80
- 239000010949 copper Substances 0.000 claims abstract description 80
- 239000012530 fluid Substances 0.000 claims abstract description 14
- 239000000853 adhesive Substances 0.000 claims description 37
- 230000001070 adhesive effect Effects 0.000 claims description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000002923 metal particle Substances 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 6
- 229910052797 bismuth Inorganic materials 0.000 claims description 6
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 6
- 229910000679 solder Inorganic materials 0.000 claims description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229910021529 ammonia Inorganic materials 0.000 claims description 2
- 239000012188 paraffin wax Substances 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims 1
- 239000013543 active substance Substances 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 235000006708 antioxidants Nutrition 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
- B21D53/04—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of sheet metal
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/085—Heat exchange elements made from metals or metal alloys from copper or copper alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/48—Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the subgroups H01L21/06 - H01L21/326
- H01L21/4814—Conductive parts
- H01L21/4871—Bases, plates or heatsinks
- H01L21/4882—Assembly of heatsink parts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/42—Fillings or auxiliary members in containers or encapsulations selected or arranged to facilitate heating or cooling
- H01L23/427—Cooling by change of state, e.g. use of heat pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2275/00—Fastening; Joining
- F28F2275/02—Fastening; Joining by using bonding materials; by embedding elements in particular materials
- F28F2275/025—Fastening; Joining by using bonding materials; by embedding elements in particular materials by using adhesives
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4935—Heat exchanger or boiler making
Definitions
- the subject matter herein generally relates to temperature control.
- FIG. 1 is a diagrammatic view of a heat dissipation device comprising a first copper sheet in accordance with a first embodiment.
- FIG. 2 is a diagrammatic view of the first copper sheet of FIG. 1 .
- FIG. 3 is a cross sectional view taken along line III-III of the first copper sheet of FIG. 2 .
- FIG. 4 is a diagrammatic view showing the heat dissipation device used with an electronic device.
- FIG. 5 illustrates a flowchart of a method for manufacturing the heat dissipation device of FIG. 1 .
- FIG. 6 illustrates a diagrammatic view of a first copper sheet and a second copper sheet provided for manufacturing the heat dissipation device.
- FIG. 7 is a diagrammatic view of an adhesive on the first copper sheet in FIG. 6 .
- FIG. 8 is a diagrammatic view of a working fluid received in the first copper sheet.
- FIG. 9 is a diagrammatic view of the second copper sheet fixed with the first copper sheet.
- substantially is defined to be essentially conforming to the particular dimension, shape, or other feature that the term modifies, such that the component need not be exact.
- substantially cylindrical means that the object resembles a cylinder, but can have one or more deviations from a true cylinder.
- comprising when utilized, means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in the so-described combination, group, series and the like.
- the references “a plurality of” and “a number of” mean “at least two.”
- the present disclosure is described in relation to a heat dissipation device.
- the heat dissipation device includes a first copper sheet and a second copper sheet.
- the first copper sheet includes a number of first recesses; the second copper sheet includes a number of second recesses.
- the second recesses correspond with the first recesses and the second copper sheet is fixed on the first copper sheet.
- An airtight receiving cavity is formed by each first recess and second recess together and a working fluid is received in the airtight receiving cavity.
- FIG. 1 illustrates a heat dissipation device 100 according to one embodiment.
- the heat dissipation device 100 includes a first copper sheet 10 , a second copper sheet 40 , and an adhesive 20 configured for fixing the first copper sheet 10 and the second copper sheet 40 together.
- a number of airtight receiving cavities 404 are formed by the first copper sheet 10 and the second copper sheet 40 and a working fluid 30 is received in each of the airtight receiving cavities 404 .
- the first copper sheet 10 includes a first surface 101 .
- the first surface 101 defines a number of first recesses 102 which are randomly distributed on the first surface 101 , and the first recesses 102 are substantially strip-shaped, as shown in FIG. 2 .
- a cross section of the first and second recesses 102 and 402 is an arc or a semicircle, as shown in FIG. 3 .
- a depth of each first recess 102 is smaller than a thickness of the first copper sheet 10 .
- a thickness of each first copper sheet 10 and second copper 40 sheet is about 140 um.
- the second copper sheet 40 has substantially the same structure and shape as the first copper sheet 40 .
- the second copper sheet 40 includes a second surface 401 .
- the second surface 401 defines a number of second recesses 402 corresponding with the first recesses 102 .
- a depth of each second recess 402 is smaller than a thickness of the second copper sheet 40 .
- the second recesses 402 and the first recesses 102 have the same shape and size.
- a number of first ribs 104 are formed between each two adjacent first recesses 102 .
- a number of second ribs 404 are formed between each two adjacent second recesses 402 , the first ribs 104 correspond locationally with the second ribs 404 .
- the adhesive 20 is arranged on the ribs 104 and the first copper sheet 10 and the second copper sheet 40 are fixed by the adhesive 20 .
- the adhesive 20 is low temperature solder paste, a melting point of the low temperature solder paste is about 139° C. or less.
- the first recesses 102 are in communication with the second recesses 402 , each first recess 102 and each second recess 402 together form a receiving cavity 404 , and the adhesive 20 is on a part of an inner wall of the receiving cavity 404 , the adhesive 20 is configured for accelerating cooling the working fluid 30 .
- the working fluid 30 is received in each receiving cavity 404 .
- the working fluid 30 can be selected from the group comprising water, methanol, ethanol, acetone, ammonia, paraffin, oil, and chlorofluorocarbons at least.
- the working fluid 30 is water.
- a heat capacity of water is about 4.2 ⁇ 10 3 J/(kg.), which is larger than a heat capacity of steel sheeting.
- FIG. 4 shows the heat dissipation device 100 being used with a heat generating member 60 .
- the heat dissipation device 100 is very thin and fixed with a heat generating member 60 of an electronic device using adhesive (not shown).
- the heat generating member 60 is a CPU but is not limited to CPU only.
- the generating member 60 is fixed on a printed circuit board 50 via solder ball 62 . Heat generated by the heat generating member 60 is transferred and gathered at bottom of the first copper sheet 10 , and the heat is absorbed by water 30 in the receiving cavity 404 and diffused through the first copper sheet 10 and the second copper sheet 40 during the heat transfer.
- the water 30 is vaporized, when water vapour is moved to an inner wall of the second recess 402 , it condenses into small water droplets which attach to the inner wall of the receiving cavity 404 . Finally the small droplets will flow into the first recess 102 again in a continuous process, so heat from the heat generating member 60 of the electronic device is dissipated.
- FIG. 5 illustrates a flowchart in accordance with an example embodiment.
- the example method 200 for manufacturing the heat dissipation device 100 (shown in FIG. 1 ) is provided by way of an example, as there are a variety of ways to carry out the method. Additionally, the illustrated order of blocks is by example only and the order of the blocks can change.
- the method 200 can begin at block 201 .
- a first copper base 15 and a second copper base 25 are provided, as shown in FIG. 6 .
- the first copper base 15 includes a first surface 101
- the second copper base 25 includes a second surface 201 facing the first surface 101 .
- a thickness of the first copper base 15 is the same as that of the second copper base 25 , being about 140 um.
- the first surface 101 is processed to form a number of first recesses 102 , and at the same time, a number of ribs 104 are formed between each two adjacent first recesses 102 .
- the second surface 401 is processed to form a number of second recesses 402 , the second recesses 402 and the first recesses 102 have the same shape and size Thereby, the first copper sheet 10 and the second copper sheet 20 are obtained.
- a depth of each first recess 102 is smaller than a thickness of the first copper sheet 10 .
- a depth of each second recess 402 is smaller than a thickness of the second copper sheet 40 .
- the first and second recesses 102 and 402 are formed using a laser beam and a cross section of the first and second recesses 102 and 402 is an arc or a semicircle, as shown in FIG. 3 .
- an adhesive 20 is provided on the ribs 104 of the first copper sheet 10 , as shown in FIG. 7 .
- a melting point of the adhesive 20 is about 139 degrees or less, but higher than a boiling point of water. That is to say, when water is used for absorbing heat, the adhesive 20 is not influenced by boiling water.
- the adhesive 20 is mainly comprised of molten resin material doped with metal particles.
- the metal particle is selected from a group comprising tin, bismuth, and any combination thereof.
- a diameter of the metal particle is in the range from about 25 um to 45 um.
- a weight ratio of tin in the adhesive 20 is in the range from about 37% to 38%.
- a weight ratio of bismuth in the adhesive 20 is in the range from about 51% to 52%.
- a weight ratio of molten resin in the adhesive 20 is in the range from about 4% to 6%.
- the resin is C 19 H 29 COOH and the adhesive 20 also comprises solvent C 10 H 20 O 3 , which is active agent C 4 H 6 O 4 , and an anti-oxidant: C 7 H 7 N 3 is configured for avoiding oxidation of the metal particles.
- the weight ratio of the solvent, active agent, and antioxidant are respectively 1.0% ⁇ 3.0%, 0.1% ⁇ 0.3%, 0.05% ⁇ 0.06%.
- the proportion of the adhesive 20 as specified above is able to obtain a better adhesion and have less susceptibility to water.
- a working fluid 30 is provided in the first recesses 102 , as shown in FIG. 8 .
- the second copper sheet 40 is pressed on the adhesive 20 and the second copper sheet 40 is fixed with the first copper sheet by the adhesive 20 , as shown in FIG. 9 , each of the first recesses 102 are in communication with each of the second recesses 402 and each of the first recess 102 and the second recesses 402 together form an airtight receiving cavity 404 .
- the adhesive 20 is solidified a heat dissipation device 100 is obtained.
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Structure Of Printed Boards (AREA)
Abstract
Description
- The subject matter herein generally relates to temperature control.
- Since a high-power electronic device generates a large amount of heat during operation, the performance and lifetime of the electronic device is lowered if the heat cannot be dissipated in time.
- Implementations of the present technology will now be described, by way of example only, with reference to the attached figures.
-
FIG. 1 is a diagrammatic view of a heat dissipation device comprising a first copper sheet in accordance with a first embodiment. -
FIG. 2 is a diagrammatic view of the first copper sheet ofFIG. 1 . -
FIG. 3 is a cross sectional view taken along line III-III of the first copper sheet ofFIG. 2 . -
FIG. 4 is a diagrammatic view showing the heat dissipation device used with an electronic device. -
FIG. 5 illustrates a flowchart of a method for manufacturing the heat dissipation device ofFIG. 1 . -
FIG. 6 illustrates a diagrammatic view of a first copper sheet and a second copper sheet provided for manufacturing the heat dissipation device. -
FIG. 7 is a diagrammatic view of an adhesive on the first copper sheet inFIG. 6 . -
FIG. 8 is a diagrammatic view of a working fluid received in the first copper sheet. -
FIG. 9 is a diagrammatic view of the second copper sheet fixed with the first copper sheet. - It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures, and components have not been described in detail so as not to obscure the related relevant feature being described. Also, the description is not to be considered as limiting the scope of the embodiments described herein. The drawings are not necessarily to scale and the proportions of certain parts have been exaggerated to better illustrate details and features of the present disclosure.
- Several definitions that apply throughout this disclosure will now be presented.
- The term “substantially” is defined to be essentially conforming to the particular dimension, shape, or other feature that the term modifies, such that the component need not be exact. For example, “substantially cylindrical” means that the object resembles a cylinder, but can have one or more deviations from a true cylinder. The term “comprising,” when utilized, means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in the so-described combination, group, series and the like. The references “a plurality of” and “a number of” mean “at least two.”
- The present disclosure is described in relation to a heat dissipation device. The heat dissipation device includes a first copper sheet and a second copper sheet. The first copper sheet includes a number of first recesses; the second copper sheet includes a number of second recesses.
- The second recesses correspond with the first recesses and the second copper sheet is fixed on the first copper sheet. An airtight receiving cavity is formed by each first recess and second recess together and a working fluid is received in the airtight receiving cavity.
-
FIG. 1 illustrates aheat dissipation device 100 according to one embodiment. Theheat dissipation device 100 includes afirst copper sheet 10, asecond copper sheet 40, and an adhesive 20 configured for fixing thefirst copper sheet 10 and thesecond copper sheet 40 together. A number of airtight receivingcavities 404 are formed by thefirst copper sheet 10 and thesecond copper sheet 40 and a workingfluid 30 is received in each of the airtight receivingcavities 404. - The
first copper sheet 10 includes afirst surface 101. Thefirst surface 101 defines a number offirst recesses 102 which are randomly distributed on thefirst surface 101, and thefirst recesses 102 are substantially strip-shaped, as shown inFIG. 2 . A cross section of the first andsecond recesses FIG. 3 . A depth of eachfirst recess 102 is smaller than a thickness of thefirst copper sheet 10. A thickness of eachfirst copper sheet 10 andsecond copper 40 sheet is about 140 um. - The
second copper sheet 40 has substantially the same structure and shape as thefirst copper sheet 40. Thesecond copper sheet 40 includes asecond surface 401. Thesecond surface 401 defines a number ofsecond recesses 402 corresponding with the first recesses 102. A depth of eachsecond recess 402 is smaller than a thickness of thesecond copper sheet 40. The second recesses 402 and thefirst recesses 102 have the same shape and size. A number offirst ribs 104 are formed between each two adjacentfirst recesses 102. A number ofsecond ribs 404 are formed between each two adjacentsecond recesses 402, thefirst ribs 104 correspond locationally with thesecond ribs 404. - The adhesive 20 is arranged on the
ribs 104 and thefirst copper sheet 10 and thesecond copper sheet 40 are fixed by the adhesive 20. In the illustrated embodiment, the adhesive 20 is low temperature solder paste, a melting point of the low temperature solder paste is about 139° C. or less. The first recesses 102 are in communication with thesecond recesses 402, eachfirst recess 102 and eachsecond recess 402 together form a receivingcavity 404, and the adhesive 20 is on a part of an inner wall of the receivingcavity 404, the adhesive 20 is configured for accelerating cooling the workingfluid 30. - The working
fluid 30 is received in each receivingcavity 404. The workingfluid 30 can be selected from the group comprising water, methanol, ethanol, acetone, ammonia, paraffin, oil, and chlorofluorocarbons at least. In the illustrated embodiment, the workingfluid 30 is water. A heat capacity of water is about 4.2×103J/(kg.), which is larger than a heat capacity of steel sheeting. -
FIG. 4 shows theheat dissipation device 100 being used with aheat generating member 60. Theheat dissipation device 100 is very thin and fixed with aheat generating member 60 of an electronic device using adhesive (not shown). In this embodiment, theheat generating member 60 is a CPU but is not limited to CPU only. The generatingmember 60 is fixed on a printedcircuit board 50 viasolder ball 62. Heat generated by theheat generating member 60 is transferred and gathered at bottom of thefirst copper sheet 10, and the heat is absorbed bywater 30 in the receivingcavity 404 and diffused through thefirst copper sheet 10 and thesecond copper sheet 40 during the heat transfer. Thewater 30 is vaporized, when water vapour is moved to an inner wall of thesecond recess 402, it condenses into small water droplets which attach to the inner wall of the receivingcavity 404. Finally the small droplets will flow into thefirst recess 102 again in a continuous process, so heat from theheat generating member 60 of the electronic device is dissipated. -
FIG. 5 illustrates a flowchart in accordance with an example embodiment. Theexample method 200 for manufacturing the heat dissipation device 100 (shown inFIG. 1 ) is provided by way of an example, as there are a variety of ways to carry out the method. Additionally, the illustrated order of blocks is by example only and the order of the blocks can change. Themethod 200 can begin atblock 201. - At
block 201, afirst copper base 15, and asecond copper base 25 are provided, as shown inFIG. 6 . Thefirst copper base 15 includes afirst surface 101, thesecond copper base 25 includes asecond surface 201 facing thefirst surface 101. A thickness of thefirst copper base 15 is the same as that of thesecond copper base 25, being about 140 um. - At
block 202, thefirst surface 101 is processed to form a number offirst recesses 102, and at the same time, a number ofribs 104 are formed between each two adjacentfirst recesses 102. Thesecond surface 401 is processed to form a number ofsecond recesses 402, thesecond recesses 402 and thefirst recesses 102 have the same shape and size Thereby, thefirst copper sheet 10 and thesecond copper sheet 20 are obtained. A depth of eachfirst recess 102 is smaller than a thickness of thefirst copper sheet 10. A depth of eachsecond recess 402 is smaller than a thickness of thesecond copper sheet 40. In this embodiment, the first andsecond recesses second recesses FIG. 3 . - At
block 203, an adhesive 20 is provided on theribs 104 of thefirst copper sheet 10, as shown inFIG. 7 . A melting point of the adhesive 20 is about 139 degrees or less, but higher than a boiling point of water. That is to say, when water is used for absorbing heat, the adhesive 20 is not influenced by boiling water. - The adhesive 20 is mainly comprised of molten resin material doped with metal particles. The metal particle is selected from a group comprising tin, bismuth, and any combination thereof. A diameter of the metal particle is in the range from about 25 um to 45 um. A weight ratio of tin in the adhesive 20 is in the range from about 37% to 38%. A weight ratio of bismuth in the adhesive 20 is in the range from about 51% to 52%. A weight ratio of molten resin in the adhesive 20 is in the range from about 4% to 6%. In the illustrated embodiment, the resin is C19H29COOH and the adhesive 20 also comprises solvent C10H20O3, which is active agent C4H6O4, and an anti-oxidant: C7H7N3 is configured for avoiding oxidation of the metal particles. The weight ratio of the solvent, active agent, and antioxidant are respectively 1.0% ˜3.0%, 0.1% ˜0.3%, 0.05% ˜0.06%. The proportion of the adhesive 20 as specified above is able to obtain a better adhesion and have less susceptibility to water.
- At
block 204, a workingfluid 30 is provided in thefirst recesses 102, as shown inFIG. 8 . - At
block 205, thesecond copper sheet 40 is pressed on the adhesive 20 and thesecond copper sheet 40 is fixed with the first copper sheet by the adhesive 20, as shown inFIG. 9 , each of thefirst recesses 102 are in communication with each of thesecond recesses 402 and each of thefirst recess 102 and thesecond recesses 402 together form anairtight receiving cavity 404. When the adhesive 20 is solidified aheat dissipation device 100 is obtained. - The embodiments shown and described above are only examples. Therefore, many such details are neither shown nor described. Even though numerous characteristics and advantages of the present technology have been set forth in the foregoing description, together with details of the structure and function of the present disclosure, the disclosure is illustrative only, and changes may be made in the detail, including in matters of shape, size, and arrangement of the parts within the principles of the present disclosure, up to and including the full extent established by the broad general meaning of the terms used in the claims. It will therefore be appreciated that the embodiments described above may be modified within the scope of the claims.
Claims (15)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CN201310474244.9A CN104582234A (en) | 2013-10-12 | 2013-10-12 | Heat radiating device, fabricating method and flexible circuit board with heat radiating device |
CN201310474244.9 | 2013-10-12 |
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US20150101785A1 true US20150101785A1 (en) | 2015-04-16 |
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US14/512,546 Abandoned US20150101785A1 (en) | 2013-10-12 | 2014-10-13 | Heat dissipation device and a method for manufacturing same |
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US (1) | US20150101785A1 (en) |
JP (1) | JP2015076619A (en) |
CN (1) | CN104582234A (en) |
TW (1) | TWI563906B (en) |
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US20170325356A1 (en) * | 2016-05-09 | 2017-11-09 | Fukui Precision Component (Shenzhen) Co., Ltd. | Ultrathin heat dissipation structure and a method for manufacturing same |
US10012454B2 (en) * | 2014-09-02 | 2018-07-03 | Avary Holding (Shenzhen) Co., Limited. | Heat dissipation device and method for manufacturing same |
CN109413929A (en) * | 2017-08-16 | 2019-03-01 | 鹏鼎控股(深圳)股份有限公司 | Heat sink and its manufacturing method |
US10777483B1 (en) * | 2020-02-28 | 2020-09-15 | Arieca Inc. | Method, apparatus, and assembly for thermally connecting layers |
US11215408B2 (en) * | 2018-12-27 | 2022-01-04 | Avermedia Technologies, Inc. | Heat dissipation device |
US20240032440A1 (en) * | 2018-10-29 | 2024-01-25 | United Microelectronics Corp. | Semiconductor device and method for fabricating the same |
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US10923411B2 (en) * | 2016-05-09 | 2021-02-16 | Avary Holding (Shenzhen) Co., Limited. | Method for manufacturing an ultrathin heat dissipation structure |
CN109413929A (en) * | 2017-08-16 | 2019-03-01 | 鹏鼎控股(深圳)股份有限公司 | Heat sink and its manufacturing method |
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Also Published As
Publication number | Publication date |
---|---|
JP2015076619A (en) | 2015-04-20 |
TW201524326A (en) | 2015-06-16 |
TWI563906B (en) | 2016-12-21 |
CN104582234A (en) | 2015-04-29 |
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