High-heat-dissipation metal-based copper-clad plate with flame-retardant structure

Abstract

The invention discloses a high-heat-dissipation metal-based copper-clad plate with a flame-retardant structure, and relates to the technical field of metal-based copper-clad plates, the high-heat-dissipation metal-based copper-clad plate comprises a copper substrate, a locking rod and a connecting conductive assembly, and flame-retardant heat-conducting insulating assemblies are attached to the upper side and the lower side of the copper substrate. According to the high-heat-dissipation metal-based copper-clad plate with the flame-retardant structure, through the arrangement of the flame-retardant coating, the flame-retardant coating can perform preliminary flame-retardant protection treatment on the metal-based copper-clad plate, and if a connecting conductive assembly is accidentally burnt through by open fire, a halogen-free flame retardant in a bearing film can automatically flow out along with the burning through of the bearing film by the open fire; the halogen-free flame retardant is prepared by mixing a phosphorus-based flame retardant and a nitrogen-based flame retardant, so that the halogen-free flame retardant has a better flame-retardant effect during flame retardance and does not generate excessive harmful gas at the same time; therefore, the flame retardance of the metal-based copper-clad plate is improved, and meanwhile, the pollution caused by burning of the metal-based copper-clad plate is also reduced.

Description

Technical Field

[0001] The invention relates to the technical field of metal-based copper-clad laminates, in particular to a metal-based copper-clad laminate with a flame-retardant structure and high heat dissipation. Background Art

[0002] Metal-based copper-clad laminates (MCCLs) are a special type of printed circuit board (PCB). Their core feature is the addition of a metal substrate between the copper foil layer and the insulating layer. This design is intended to improve the PCB's heat dissipation performance and mechanical strength, making it particularly effective in high-power, high-heat-density electronic applications. However, current MCLs still have the following shortcomings:

[0003] First, the existing metal-based copper clad laminates have poor flame retardancy, which makes them very susceptible to damage when exposed to open flames. This not only increases the maintenance cost of the metal-based copper clad laminates, but also easily damages the components installed on the metal-based copper clad laminates, leading to certain usage defects.

[0004] Second, the existing metal-based copper clad laminates are mostly made by gluing and pressing, which makes it extremely inconvenient for workers to subsequently repair and replace the protective layer, thereby increasing the recycling cost of the metal-based copper clad laminates and the maintenance cost of the metal-based copper clad laminates. Summary of the Invention

[0005] The object of the present invention is to provide a metal-based copper-clad laminate with high heat dissipation and a flame-retardant structure, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a metal-based copper-clad laminate with a flame-retardant structure and high heat dissipation, comprising a copper substrate, a locking rod and a connecting conductive component, wherein flame-retardant thermally conductive insulating components are fitted on the upper and lower sides of the copper substrate, and an auxiliary heat dissipation component is fitted on the outer side of the flame-retardant thermally conductive insulating component, the locking rod is movably installed inside the copper substrate, and the side of the locking rod is fitted and connected to the inner surface of the flame-retardant thermally conductive insulating component, and the connecting conductive component is symmetrically fitted on the outer sides of the upper and lower groups of flame-retardant thermally conductive insulating components.

[0007] Furthermore, the flame-retardant thermally conductive insulating component includes an insulating connecting bracket, and limiting grooves are provided at equal intervals inside the insulating connecting bracket, and locking holes are provided inside the limiting grooves, and an insulating thermally conductive partition frame is fixedly installed on the inner surface of the insulating connecting bracket, and a supporting film is fixedly connected to the side of the insulating thermally conductive partition frame, and the interior of the supporting film is filled with a halogen-free flame retardant.

[0008] Furthermore, the inner dimension of the locking hole is completely consistent with the outer dimension of the end of the locking rod, and the locking rod forms a locking structure with the insulating connecting bracket through the locking hole.

[0009] Furthermore, the number of the supporting films is four groups, and the four groups of supporting films are equidistantly mounted on the inner surface of the insulating connection bracket, and the outer surface of the supporting films is fixedly connected to the outer surface of the insulating heat-conducting partition frame.

[0010] Furthermore, the auxiliary heat dissipation component includes an insulating connecting plate, and the inner surface of the insulating connecting plate is symmetrically and equidistantly fixed with a snap-on locking block, and a connecting hole is opened inside the snap-on locking block, and an insulating thermal conductive plate is embedded and fixedly installed inside the insulating connecting plate, and at the same time, the outer surface of the insulating thermal conductive plate is fixedly installed with heat dissipation fins at equal distances, and the inner side of the heat dissipation fins is fixedly connected to the outer surface of the insulating connecting plate.

[0011] Furthermore, the outer dimensions of the snap-fit ​​locking block are completely consistent with the inner dimensions of the limiting groove, and the snap-fit ​​locking block forms a snap-fit ​​structure with the insulating connecting bracket through the limiting groove.

[0012] Furthermore, the diameter of the locking rod is exactly the same as the inner diameter of the connecting hole, and the inner diameter of the connecting hole is exactly the same as the inner diameter of the through hole opened on the copper substrate, and the locking rod passes through the locking hole, the connecting hole and the through hole in the copper substrate in sequence.

[0013] Furthermore, the end of the heat dissipation fin is fixedly connected to the outer side of the insulating connecting plate, and the inner side of the insulating connecting plate is fixedly connected to the end of the snap-fit ​​locking block, and the heat dissipation fin, the snap-fit ​​locking block and the insulating connecting plate form a fixed structure.

[0014] Furthermore, the connecting conductive component includes a base copper foil layer, the inner surface of the base copper foil layer is coated with an adhesive connection layer, and the outer surface of the base copper foil layer is sprayed with a flame retardant coating by a sprayer.

[0015] Furthermore, the upper surface of the adhesive connection layer is adhered and fixedly connected to the lower surface of the basic copper foil layer, and the lower surface of the adhesive connection layer is adhered and fixedly connected to the upper surface of the flame retardant thermally conductive insulating component, and the basic copper foil layer is fixedly connected to the flame retardant thermally conductive insulating component through the adhesive connection layer.

[0016] The present invention provides a metal-based copper-clad laminate with high heat dissipation and a flame-retardant structure, which has the following beneficial effects:

[0017] 1. The flame-retardant coating provided in the present invention can provide preliminary flame-retardant protection for the metal-based copper-clad laminate. If the connected conductive component is accidentally burned through by an open flame, the halogen-free flame retardant in the carrier film can automatically flow out along with the carrier film, thereby achieving the purpose of high-efficiency flame retardancy. Moreover, since the halogen-free flame retardant is made by mixing a phosphorus-based flame retardant and a nitrogen-based flame retardant, the halogen-free flame retardant has a better flame retardant effect and does not produce excessive harmful gases. This improves the flame retardancy of the metal-based copper-clad laminate while also reducing the pollution caused by burning the metal-based copper-clad laminate. At the same time, it also avoids the damage to the metal-based copper-clad laminate when encountering an open flame, which causes an increase in the maintenance cost of the metal-based copper-clad laminate and the easy damage of components installed on the metal-based copper-clad laminate.

[0018] 2. The present invention provides a limiting groove, which makes it easy for the card-jointed locking block to be inserted into the interior of the insulating connecting bracket to complete the preliminary positioning and installation of the auxiliary heat dissipation component, and also completes the preliminary fitting and installation between the copper substrate and the flame-retardant thermally conductive insulating component. Then, the locking work is completed by sequentially passing the locking rod through the locking hole, the connecting hole, the through hole in the copper substrate, the connecting hole and the locking hole, thereby providing convenience for the assembly work of the staff (multiple sets of locking rods can be quickly installed in an integrated pressing manner, and when disassembling, only need to press them against the special mold to push the locking rod out), and also providing convenience for the staff in the subsequent maintenance and replacement of the flame-retardant thermally conductive insulating component, thereby avoiding the situation where the staff is extremely inconvenienced in the subsequent maintenance and replacement of the protective layer, resulting in an increase in the recycling cost of the metal-based copper clad laminate and an increase in the maintenance cost of the metal-based copper clad laminate.

[0019] 3. The present invention sets an insulating heat-conducting partition frame so that the heat at the connection conductive component can be quickly transferred to the copper substrate. Then, the heat received by the copper substrate is automatically transferred to the heat dissipation fins through the cooperation of the insulating heat-conducting sheet and the heat dissipation speed is accelerated through the cooperation of the heat dissipation fins, thereby greatly improving the heat dissipation efficiency of the metal-based copper clad laminate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of a front-view exploded three-dimensional structure of a metal-based copper-clad laminate with a flame-retardant structure and high heat dissipation according to the present invention;

[0021] Figure 2 This is a schematic diagram of the front three-dimensional structure of a metal-based copper-clad laminate with a flame-retardant structure and high heat dissipation of the present invention;

[0022] Figure 3 The invention provides a high heat dissipation metal-based copper-clad laminate with a flame retardant structure. Figure 1 A schematic diagram of the structure at center A;

[0023] Figure 4This is a schematic diagram of the three-dimensional structure of an insulating connecting bracket and an insulating heat-conducting partition frame of a metal-based copper-clad laminate with high heat dissipation and a flame-retardant structure according to the present invention;

[0024] Figure 5 This is a schematic diagram of the three-dimensional structure of a base copper foil layer-flame retardant coating of a high heat dissipation metal-based copper clad laminate with a flame retardant structure according to the present invention;

[0025] Figure 6 This is a schematic diagram of the split three-dimensional structure of a locking block and a locking rod of a metal-based copper-clad laminate with a flame-retardant structure and high heat dissipation of the present invention.

[0026] In the figure: 1. Copper base plate; 2. Flame-retardant thermally conductive insulating component; 21. Insulated connecting bracket; 22. Limiting groove; 23. Locking hole; 24. Insulated thermally conductive partition; 25. Carrying film; 26. Halogen-free flame retardant; 3. Auxiliary heat dissipation component; 31. Insulated connecting plate; 32. Snap-on locking block; 33. Connecting hole; 34. Insulated thermally conductive sheet; 35. Heat dissipation fin; 4. Locking rod; 5. Connecting conductive component; 51. Basic copper foil layer; 52. Adhesive connecting layer; 53. Flame retardant coating. DETAILED DESCRIPTION

[0027] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0028] like Figure 1 、 Figure 2 、 Figure 4 and Figure 5As shown, a metal-based copper-clad laminate with high heat dissipation and flame retardant structure includes a copper substrate 1, a locking rod 4 and a connecting conductive component 5. The upper and lower sides of the copper substrate 1 are fitted with flame retardant thermal conductive insulation components 2. The flame retardant thermal conductive insulation component 2 includes an insulating connecting bracket 21, and the interior of the insulating connecting bracket 21 is provided with limit grooves 22 at equal distances, and the interior of the limit groove 22 is provided with a locking hole 23. The internal size of the locking hole 23 is completely consistent with the external size of the end of the locking rod 4, and the locking rod 4 is connected to the insulating connecting bracket through the locking hole 23. 21 constitutes a snap-fit ​​structure, and the locking rod 4 and the insulating connecting bracket 21 are set to form a snap-fit ​​structure, so that the locking rod 4 can be easily inserted into the interior of the insulating connecting bracket 21 to complete the locking work, and the inner surface of the insulating connecting bracket 21 is fixedly installed with an insulating heat-conducting partition frame 24, and the side of the insulating heat-conducting partition frame 24 is fixedly connected with a supporting film 25. The number of the supporting films 25 is four groups, and the four groups of supporting films 25 are equidistantly installed on the inner surface of the insulating connecting bracket 21, and the surface of the supporting film 25 is fixedly installed. The surface is fixedly connected to the outer surface of the insulating heat-conducting partition frame 24, and the interior of the carrier film 25 is filled with a halogen-free flame retardant 26. Through the setting of the halogen-free flame retardant 26, the halogen-free flame retardant 26 can automatically flow out when the carrier film 25 is burned by an open flame for flame retardant treatment. The outer side of the flame-retardant heat-conducting insulation component 2 is clamped and installed with an auxiliary heat dissipation component 3. The locking rod 4 is movably installed in the interior of the copper substrate 1, and the side of the locking rod 4 is clamped and connected with the inner surface of the flame-retardant heat-conducting insulation component 2. The connecting conductive component 5 is symmetrically mounted on the upper and lower sides. On the outside of the lower two groups of flame-retardant thermally conductive insulating components 2, the connecting conductive component 5 includes a basic copper foil layer 51, and the inner surface of the basic copper foil layer 51 is coated with an adhesive connecting layer 52, the upper surface of the adhesive connecting layer 52 is adhered and fixedly connected to the lower surface of the basic copper foil layer 51, and the lower surface of the adhesive connecting layer 52 is adhered and fixedly connected to the upper surface of the flame-retardant thermally conductive insulating component 2, and the basic copper foil layer 51 is fixedly connected to the flame-retardant thermally conductive insulating component 2 through the adhesive connecting layer 52, and the outer surface of the basic copper foil layer 51 is sprayed with a flame retardant coating 53 by a sprayer.

[0029] like Figure 1 、 Figure 2 、 Figure 3 and Figure 6As shown, flame-retardant heat-conducting insulating components 2 are fitted on the upper and lower sides of the copper substrate 1, and an auxiliary heat dissipation component 3 is fitted on the outer side of the flame-retardant heat-conducting insulating component 2, the auxiliary heat dissipation component 3 includes an insulating connecting plate 31, and the inner surface of the insulating connecting plate 31 is symmetrically and equidistantly fixed with a snap-fit ​​locking block 32, the outer size of the snap-fit ​​locking block 32 is completely consistent with the inner size of the limiting groove 22, and the snap-fit ​​locking block 32 forms a snap-fit ​​structure with the insulating connecting bracket 21 through the limiting groove 22, by setting the snap-fit ​​locking block 32 and the insulating connecting bracket 21 as a snap-fit ​​structure, the snap-fit ​​locking block 32 is easy to be inserted into the interior of the insulating connecting bracket 21 to complete the preliminary fixing work, and a connecting hole 33 is provided inside the snap-fit ​​locking block 32, the diameter size of the locking rod 4 is exactly the same as the inner diameter size of the connecting hole 33, and the inner diameter size of the connecting hole 33 is exactly the same as the inner diameter size of the through hole opened on the copper substrate 1, and the locking rod 4 passes through the lock The fixed hole 23, the connecting hole 33 and the through hole in the copper substrate 1, and the insulating connecting plate 31 is embedded with an insulating heat conductive sheet 34 fixedly installed therein, and the outer surface of the insulating heat conductive sheet 34 is fixedly installed with heat dissipation fins 35 at equal distances, the ends of the heat dissipation fins 35 are fixedly connected to the outer side of the insulating connecting plate 31, and the inner side of the insulating connecting plate 31 is fixedly connected to the end of the snap-fit ​​locking block 32, and the heat dissipation fins 35 and the snap-fit ​​locking block 32 form a fixed structure with the insulating connecting plate 31. By setting the heat dissipation fins 35 and the insulating connecting plate 31 into a fixed structure, the heat dissipation fins 35 will not loosen during auxiliary heat dissipation, the inner side of the heat dissipation fins 35 is fixedly connected to the outer surface of the insulating connecting plate 31, the locking rod 4 is movably installed through the interior of the copper substrate 1, and the side of the locking rod 4 is snap-fitted to the inner surface of the flame-retardant heat-conductive insulating component 2, and the connecting conductive component 5 is symmetrically installed on the outer sides of the upper and lower groups of flame-retardant heat-conductive insulating components 2.

[0030] In summary, combined Figures 1-6As shown, the working principle of the high heat dissipation metal-based copper-clad laminate with a flame-retardant structure is as follows: first, the staff fits the upper and lower groups of flame-retardant thermally conductive insulating components 2 on the upper and lower sides of the copper substrate 1, then grasps the insulating connecting plate 31 and inserts the snap-fit ​​locking block 32 into the interior of the limit groove 22 through it, thereby completing the preliminary installation of the auxiliary heat dissipation component 3, then the staff grasps the locking rod 4 and puts it into the interior of the locking hole 23 in turn, and then uses a pressing machine to press the locking rod 4 into the interior of the locking hole 23. At this time, the side of the locking rod 4 passes through the locking hole 23, the connecting hole 33, the through hole in the copper substrate 1, the connecting hole 33 and the locking hole 23 in turn, thereby completing the preliminary installation of the metal-based copper-clad laminate, and then the basic copper foil layer 51 is fit and fixedly installed on the outside of the flame-retardant thermally conductive insulating component 2 through the cooperation of the adhesive connecting layer 52, and then the flame-retardant coating 53 is sprayed onto the outer surface of the basic copper foil layer 51 by a sprayer, thereby completing the overall assembly of the metal-based copper-clad laminate;

[0031] Secondly, when the metal-based copper-clad laminate is in use, the heat of the base copper foil layer 51 is promptly transferred to the copper substrate 1 through the cooperation of the insulating heat-conducting partition frame 24. Then, due to the bonding connection between the insulating heat-conducting sheet 34 and the copper substrate 1, the heat received by the copper substrate 1 can be automatically transferred to the heat dissipation fins 35 for rapid heat dissipation, thereby ensuring that the heat of the metal-based copper-clad laminate itself does not continue to rise during continuous use;

[0032] Finally, when the metal-based copper-clad laminate encounters open flame during use, the flame-retardant coating 53 is used to perform preliminary flame-retardant protection on the metal-based copper-clad laminate. If the halogen-free flame retardant 26 is burned by the open flame, the halogen-free flame retardant 26 automatically flows out for further flame-retardant protection.

[0033] The embodiments of the present invention are presented for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application and to enable those skilled in the art to understand the invention and design various embodiments with various modifications as suited for specific applications.

Claims

1. A metal-based copper-clad laminate with high heat dissipation and flame retardant structure, comprising a copper substrate (1), a locking rod (4) and a connecting conductive component (5), characterized in that: The upper and lower sides of the copper base plate (1) are fitted with flame-retardant heat-conducting insulation components (2), and the outer side of the flame-retardant heat-conducting insulation component (2) is fitted with an auxiliary heat dissipation component (3). The locking rod (4) is movably installed inside the copper base plate (1), and the side of the locking rod (4) is fitted with the inner surface of the flame-retardant heat-conducting insulation component (2). The connecting conductive component (5) is symmetrically fitted on the outer sides of the upper and lower groups of flame-retardant heat-conducting insulation components (2).

2. The high heat dissipation metal-based copper-clad laminate with a flame-retardant structure according to claim 1, characterized in that: The flame-retardant heat-conducting insulating component (2) comprises an insulating connection bracket (21), and the interior of the insulating connection bracket (21) is provided with limiting grooves (22) at equal intervals, and the interior of the limiting grooves (22) is provided with locking holes (23), and the inner surface of the insulating connection bracket (21) is fitted and fixedly mounted with an insulating heat-conducting partition frame (24), and the side of the insulating heat-conducting partition frame (24) is fitted and fixedly connected with a supporting film (25), and the interior of the supporting film (25) is filled with a halogen-free flame retardant (26).

3. The high heat dissipation metal-based copper-clad laminate with a flame-retardant structure according to claim 2, characterized in that: The inner dimensions of the locking hole (23) completely match the outer dimensions of the end of the locking rod (4), and the locking rod (4) forms a snap-fit ​​structure with the insulating connection bracket (21) through the locking hole (23).

4. The high heat dissipation metal-based copper-clad laminate with a flame-retardant structure according to claim 2, characterized in that: The number of the supporting films (25) is four groups, and the four groups of the supporting films (25) are equidistantly mounted on the inner surface of the insulating connection bracket (21), and the outer surface of the supporting films (25) is fixedly connected to the outer surface of the insulating heat-conducting partition frame (24).

5. The high heat dissipation metal-based copper-clad laminate with a flame-retardant structure according to claim 2, characterized in that: The auxiliary heat dissipation assembly (3) includes an insulating connecting plate (31), and a snap-on locking block (32) is fixedly installed at equal distances and symmetrically on the inner surface of the insulating connecting plate (31), and a connecting hole (33) is provided inside the snap-on locking block (32). An insulating heat conducting sheet (34) is embedded and fixedly installed inside the insulating connecting plate (31), and heat dissipation fins (35) are fixedly installed at equal distances on the outer surface of the insulating heat conducting sheet (34), and the inner side of the heat dissipation fins (35) is fixedly connected to the outer surface of the insulating connecting plate (31).

6. The high heat dissipation metal-based copper-clad laminate with a flame-retardant structure according to claim 5, characterized in that: The external dimensions of the snap-fit ​​locking block (32) completely match the internal dimensions of the limiting groove (22), and the snap-fit ​​locking block (32) forms a snap-fit ​​structure with the insulating connection bracket (21) through the limiting groove (22).

7. The metal-based copper-clad laminate with high heat dissipation and flame retardant structure according to claim 5, characterized in that: The diameter of the locking rod (4) is completely identical to the inner diameter of the connecting hole (33), and the inner diameter of the connecting hole (33) is completely identical to the inner diameter of the through hole opened on the copper base plate (1), and the locking rod (4) passes through the locking hole (23), the connecting hole (33) and the through hole in the copper base plate (1) in sequence.

8. The metal-based copper-clad laminate with high heat dissipation and flame retardant structure according to claim 5, characterized in that: The end of the heat dissipation fin (35) is fixedly connected to the outer side of the insulating connecting plate (31), and the inner side of the insulating connecting plate (31) is fixedly connected to the end of the clamping locking block (32), and the heat dissipation fin (35), the clamping locking block (32) and the insulating connecting plate (31) form a fixed structure.

9. The metal-based copper-clad laminate with high heat dissipation and flame retardant structure according to claim 1, characterized in that: The connecting conductive component (5) comprises a base copper foil layer (51), the inner surface of the base copper foil layer (51) is coated with an adhesive connection layer (52), and the outer surface of the base copper foil layer (51) is sprayed with a flame retardant coating (53) by a sprayer.

10. The metal-based copper-clad laminate with high heat dissipation and flame retardant structure according to claim 9, characterized in that: The upper surface of the adhesive connection layer (52) is adhered and fixedly connected to the lower surface of the base copper foil layer (51), and the lower surface of the adhesive connection layer (52) is adhered and fixedly connected to the upper surface of the flame-retardant heat-conducting insulation component (2), and the base copper foil layer (51) is fixedly connected to the flame-retardant heat-conducting insulation component (2) via the adhesive connection layer (52).

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