Vapor chamber manufacturing method and vapor chamber finished product

Abstract

The invention relates to a method for manufacturing a vapor chamber. The method comprises the following steps: a) providing a stainless steel shell with a cavity; b) roughening the inner wall surface of the stainless steel shell to form a rough surface; c) forming a capillary structure on the rough surface; d) forming a support structure through 3D printing sintering and positioning; e) injecting a working fluid; f) providing a closed cavity, and placing the closed cavity into a stainless steel shell; g) vacuumizing the closed cavity; and h) sealing the stainless steel housing. In addition, the invention also provides a vapor chamber finished product manufactured by using the vapor chamber manufacturing method. Therefore, the purposes that the complexity and the cost of production are reduced, no extra space is occupied, and the thin design of the vapor chamber is facilitated are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to a vapor chamber, in particular to a manufacturing method of a vapor chamber without a filling pipe and a product manufactured thereby. BACKGROUND

[0002] In the current manufacturing process of a vapor chamber, a filling pipe (or a gas removal pipe) is usually provided to inject working fluid and perform gas removal or vacuum extraction. Subsequently, the edge is sealed and welded to form the vapor chamber. However, the provision of the filling pipe increases the complexity and cost of production, and may occupy additional space, which is not conducive to the thin design of the vapor chamber.

[0003] Furthermore, the internal space of the vapor chamber is usually provided with a support structure. The support structure provides sufficient support to the internal space of the vapor chamber to prevent deformation or damage during manufacturing or use. In addition, a reasonably designed internal support structure helps to evenly distribute heat and avoid local overheating, thereby improving the heat dissipation performance of the vapor chamber. However, the design and manufacturing method of the support structure require precise process technology, thereby increasing the complexity and cost of the manufacturing method.

[0004] Therefore, the present applicant has made great efforts to solve the above problems in the prior art by means of careful research and application of scientific principles, and the improvement has become the goal of the present application. SUMMARY

[0005] An object of the present application is to provide a manufacturing method of a vapor chamber without a filling pipe, thereby reducing the complexity and cost of production, and not occupying additional space, which is conducive to the thin design of the vapor chamber.

[0006] An object of the present application is to provide a manufacturing method of a vapor chamber, in which a support structure is formed by 3D printing and sintering, thereby providing sufficient support to the internal space of the vapor chamber to prevent deformation or damage during manufacturing or use, thereby maintaining the structural integrity and stability of the vapor chamber.

[0007] In order to achieve the above-mentioned objects, the present application is a manufacturing method of a vapor chamber, comprising the following steps: a) providing a stainless steel shell having a cavity; b) roughening the inner wall surface of the stainless steel shell to form a rough surface; c) forming a capillary structure on the rough surface; d) forming a support structure by 3D printing and sintering and positioning; e) injecting working fluid; f) providing a sealed cavity and placing it in the stainless steel shell; g) vacuuming the sealed cavity; and h) sealing the stainless steel shell.

[0008] In one embodiment of the present application, the stainless steel shell includes a bottom plate, a frame and a cover plate, and the roughening in step b) is performed on the wall surfaces of the bottom plate and the cover plate facing the cavity by laser.

[0009] In one embodiment of the present application, the capillary structure is formed by 3D laser sintering printing of stainless steel powder in the step c), and the thickness of the capillary structure is not less than 0.01 mm and not more than 0.1 mm.

[0010] In one embodiment of the present application, the support structure comprises a layer plate and a plurality of protrusions, and the support structure is arranged on the opposite sides of the layer plate with an average of 25 to 30 protrusions per square centimeter.

[0011] In one embodiment of the present application, the working fluid in the step e) is first injected into the support structure, and then the support structure is placed in the cavity.

[0012] In one embodiment of the present application, the stainless steel shell in the step f) is positioned by a jig.

[0013] In one embodiment of the present application, in the step g), the vacuum is performed at a temperature below the boiling point of the working fluid.

[0014] In one embodiment of the present application, the stainless steel shell in the step h) is sealed by laser welding.

[0015] In order to achieve the above-mentioned purpose, the present application is a heat spreader product, which comprises a stainless steel shell, a capillary structure, a support structure, and a working fluid. The stainless steel shell has a cavity, and the stainless steel shell comprises a rough surface facing the cavity. The capillary structure is arranged on the rough surface. The support structure is positioned in the cavity, and the support structure comprises a layer plate formed by 3D printing sintering and a plurality of protrusions stacked on the layer plate, and the protrusions are arranged on the opposite sides of the layer plate. The working fluid is injected into the cavity.

[0016] In one embodiment of the present application, the support structure comprises a layer plate and a plurality of protrusions, each protrusion is a hollow cone, and the protrusions on one side of the layer plate are connected to the adjacent protrusions on the other side.

[0017] Compared with the prior art, the heat spreader manufacturing method of the present application roughens the inner wall surface of the stainless steel shell, forms the capillary structure on the rough surface, forms the support structure by 3D printing sintering, and performs vacuum and laser welding on the semi-finished product of the heat spreader in a sealed cavity to manufacture the heat spreader. Since the heat spreader manufacturing method of the present application does not provide a material injection pipe, the complexity and cost of production are reduced, and the provision of the material injection pipe is beneficial to the thin design of the heat spreader. In addition, the support structure is formed by 3D printing sintering, so as to reduce the complexity and cost of production, and does not occupy additional space, which is beneficial to the thin design of the heat spreader. In addition, the inner support structure is formed by 3D printing sintering, which can simplify the design and manufacturing method technology of the support structure, and reduce the complexity and cost of the manufacturing method. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 This is a flowchart of the steps involved in manufacturing the heat exchanger plate in this case.

[0019] Figure 2 This is a three-dimensional exploded view of the temperature distribution plate product in this case.

[0020] Figure 3 This is a three-dimensional appearance diagram of the supporting structure in this case.

[0021] Figure 4 This is a schematic diagram of the working fluid injection support structure in this case.

[0022] Figure 5 This is a schematic diagram of the clamping mechanism in this case.

[0023] Figure 6 This is a schematic diagram of the vacuuming process in the manufacturing method of the heat spreader in this case.

[0024] Figure 7 This is a welding diagram illustrating the manufacturing method of the heat spreader in this case.

[0025] Figure 8 This is a three-dimensional appearance diagram of the temperature distribution plate product in this case.

[0026] Figure 9 This is a composite sectional view of the temperature distribution plate product in this case. Detailed Implementation

[0027] The detailed description and technical content of this case are illustrated below with accompanying drawings. However, the accompanying drawings are provided for reference and illustration only and are not intended to limit this case.

[0028] Please refer to Figure 1 This is a flowchart illustrating the steps of the vapor chamber manufacturing method in this case. This case provides a vapor chamber manufacturing method without a filling pipe, which eliminates the need for filling pipes (degassing pipes) to inject working fluid or for degassing or vacuuming processes. Furthermore, this case also provides a method based on… Figure 1 A heat exchange plate product made by a heat exchange plate manufacturing method.

[0029] Please refer to Figure 2 This is an exploded three-dimensional view of the temperature distribution plate product in this case, along with... Figure 1 The method for manufacturing a heat spreader is described herein. The method for manufacturing a heat spreader in this case includes, as described in step a), providing a stainless steel housing 10 having a cavity 100, and as described in step b), roughening the inner wall surface of the stainless steel housing 10 to form a rough surface.

[0030] In this embodiment, the stainless steel housing 10 includes a bottom plate 11, a frame 12, and a cover plate 13. The frame 12 is disposed between the bottom plate 11 and the cover plate 13 to form the cavity 100 between the bottom plate 11 and the cover plate 13. Also, as described in step b), the walls of the bottom plate 11 and the cover plate 13 facing the cavity 100 are roughened by laser processing, and a capillary structure 14 is formed on the roughened surface according to step c). Specifically, the capillary structure 14 is formed by 3D laser sintering printing of stainless steel powder, and the thickness of the capillary structure 14 is not less than 0.01 mm and not more than 0.1 mm.

[0031] Further, according to step d), the support structure 20 is formed by 3D printing sintering, and the support structure 20 is positioned in the cavity 100. Please refer to Figure 3 , which is a schematic diagram of the stereoscopic appearance of the support structure of the present application. In this embodiment, the support structure 20 includes a layer plate 21 and a plurality of protrusions 22. The support structure 20 of the present application is disposed on the opposite side of the layer plate 21 with an average of 25 to 30 protrusions 22 per square centimeter. Specifically, each protrusion 22 is a hollow cone. In addition, the protrusions 22 on one side of the layer plate 21 are connected to the adjacent protrusions 22 on the other side. It should be noted that through holes are also provided between adjacent protrusions 22 to facilitate the flow of gas.

[0032] Please refer to Figure 4 , which are schematic diagrams of the working fluid injection support structure of the present application, respectively, and are described in conjunction with Figure 1 , the manufacturing method of the vapor chamber. The manufacturing method of the vapor chamber of the present application further includes step e) of injecting working fluid 30 into the support structure 20. In this embodiment, the working fluid 30 is first injected into the support structure 20, and then the support structure 20 is placed into the cavity 100 together with the working fluid 30. In actual implementation, the working fluid 30 can be injected into the cavity 100 after the support structure 20 is placed into the stainless steel housing 10. It should be noted that the bottom plate 11 of the present application can be first placed on the processing table 40, and then the frame 12 is placed on the bottom plate 11 to form the cavity 100, so as to facilitate subsequent placement of the support structure 20.

[0033] Please refer to Figure 5 , which is a schematic diagram of the presser of the jig of the present application. The stainless steel housing 10 of the present application includes a bottom plate 11, a frame 12, and a cover plate 13. After the working fluid 30 is injected into the cavity 100, the cover plate 13 is closed on the frame 12 to seal the cavity 100. In actual implementation, the stainless steel housing 10 is positioned by the jig 50.

[0034] Please refer to Figure 6 , which is a schematic diagram of the vacuum pumping of the manufacturing method of the vapor chamber of the present application, and is described in conjunction with Figure 1The manufacturing method of the vapor chamber further includes a step f) of providing a sealed cavity 60 and placing the stainless steel shell 10 provided with the support structure 20 into the sealed cavity 60. The stainless steel shell 10 is placed on the machining table 40 and is pressed by the jig 50. In addition, the manufacturing method of the vapor chamber includes a step g) of vacuumizing the sealed cavity 60 by using a vacuum device 70 so as to form a vacuum state in the sealed cavity 60 and the cavity 100 of the stainless steel shell 10.

[0035] It is to be noted that the vacuum device 70 can be a vacuum pump connected to the sealed cavity 60 and used to vacuumize the sealed cavity 60. In addition, the vacuumization in the step g) is performed at a temperature below the boiling point of the working fluid 30.

[0036] Please refer to Figure 7 is a schematic view of the welding of the manufacturing method of the vapor chamber of the present application, and is combined with Figure 1 The manufacturing method of the vapor chamber further includes a step h) of sealing the stainless steel shell 10. The support structure 20 is positioned by laser welding the surface of the stainless steel shell 10. In addition, the bottom plate 11, the frame 12 and the cover plate 13 are combined by laser welding the periphery of the stainless steel shell 10, so as to maintain the vacuum and the sealing of the cavity 100 and complete the finished vapor chamber product

[0037] Please refer to Figure 8 is a schematic view of the finished vapor chamber product of the present application. The finished vapor chamber product 1 is manufactured according to the manufacturing method of the vapor chamber of the present application. Since the finished vapor chamber product 1 does not use a filling pipe (a degassing pipe) in the manufacturing method, the filling pipe (the degassing pipe) or a post-processing trace is not seen on the appearance of the finished product.

[0038] Please refer to Figure 9 is a sectional view of the finished vapor chamber product of the present application. The finished vapor chamber product 1 of the present application includes a stainless steel shell 10, a capillary structure 14, a support structure 20 and a working fluid 30. The stainless steel shell 10 has a cavity 100, and the stainless steel shell 10 includes a rough surface 101 facing the cavity.

[0039] In addition, the support structure 20 is positioned in the cavity 100. The support structure 20 includes a layer plate 21 formed by 3D printing sintering and a plurality of protrusions 22 stacked and printed on the layer plate 21. The protrusions 22 are arranged at opposite sides of the layer plate 21. In addition, the working fluid 30 is injected into the cavity 100.

[0040] Specifically, the stainless steel housing 10 includes a bottom plate 11, a frame 12, and a cover plate 13. The support structure 20 includes a layer plate 21 and a plurality of protrusions 22. In addition, each protrusion 22 is a hollow cone, and the protrusions 22 on one side of the layer plate 21 are connected to the adjacent protrusions 22 on the other side. The protrusions 22 on one side of the support structure 20 abut the bottom plate 11, and the protrusions 22 on the other side abut the cover plate 13.

[0041] Accordingly, the heat spreader product 1 of the present application does not have a filling pipe, so that the complexity and cost of production can be reduced, and no additional space is occupied, which is beneficial to the thin design of the heat spreader. In addition, the inner support structure is formed by 3D printing and sintering, so as to simplify the design and manufacturing process technology of the support structure, and reduce the complexity and cost of the manufacturing process.

[0042] The above description is only a preferred embodiment of the present application, and is not intended to limit the patent scope of the present application. Other equivalent changes made in accordance with the spirit of the present application should also belong to the patent scope of the present application.

[0043] List of reference signs

[0044] 1: heat spreader product

[0045] 10: stainless steel housing

[0046] 100: cavity

[0047] 101: rough surface

[0048] 11: bottom plate

[0049] 12: frame

[0050] 13: cover plate

[0051] 14: capillary structure

[0052] 20: support structure

[0053] 21: layer plate

[0054] 22: protrusion

[0055] 30: working fluid

[0056] 40: processing table

[0057] 50: jig

[0058] 60: sealed cavity

[0059] 70: vacuum device

Claims

1. A method for manufacturing a heat spreader, comprising the following steps: a) Provide a stainless steel housing with a cavity; b) Roughen the inner wall surface of the stainless steel shell to form a rough surface; c) A capillary structure is formed on this rough surface; d) The support structure is formed by 3D printing and sintering, and positioned in the cavity; e) Inject the working fluid into the support structure; f) Provide a sealed cavity and place the stainless steel housing with the support structure into the sealed cavity; g) Evacuate the sealed cavity; as well as h) Seal the stainless steel housing.

2. The method for manufacturing a heat spreader according to claim 1, wherein the stainless steel shell includes a base plate, a frame and a cover plate, and step b) roughens the wall surfaces of the base plate and the cover plate facing the cavity by means of a laser.

3. The method for manufacturing a heat spreader according to claim 1, wherein in step c), the capillary structure is formed by 3D laser sintering and printing stainless steel powder, and the thickness of the capillary structure is not less than 0.01 mm and not more than 0.1 mm.

4. The method for manufacturing a heat exchange plate according to claim 1, wherein the support structure comprises a layer plate and a plurality of protrusions, the support structure being arranged on opposite sides of the layer plate with an average of 25 to 30 protrusions per square centimeter.

5. The method for manufacturing a heat exchanger according to claim 1, wherein the working fluid in step e) is first injected into the support structure and then placed in the cavity along with the support structure.

6. The method for manufacturing a heat spreader according to claim 1, wherein in step f), the stainless steel housing is positioned by a fixture.

7. The method for manufacturing a heat spreader according to claim 1, wherein in step g), the sealed cavity is evacuated at a temperature below the boiling point of the working fluid.

8. The method for manufacturing a heat spreader according to claim 1, wherein in step h), the stainless steel shell is sealed by laser welding.

9. A heat exchanger product manufactured using the heat exchanger manufacturing method according to any one of claims 1 to 8, comprising: A stainless steel housing having a cavity, the stainless steel housing including a rough surface facing the cavity; Capillary structures are set on this rough surface; A support structure, positioned within the cavity, comprises a layer formed by 3D printing and sintering, and a plurality of protrusions stacked on the layer, the protrusions being spaced apart on opposite sides of the layer; and The working fluid is injected into the cavity.

10. The heat spreader product according to claim 9, wherein the support structure comprises a layer plate and a plurality of protrusions, each protrusion being a hollow cone, and a protrusion on one side of the layer plate connecting to an adjacent protrusion on the other side.

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