Ultra-high thermal conductivity graphite-based heat sink shielding composite structure and method of use thereof

Abstract

The application discloses a super-high heat-conducting graphite-based heat-dissipating shielding composite structure and a use method thereof, and comprises, from top to bottom, a grid release film, a copper foil double-sided adhesive tape, a graphite sheet, a single-sided conductive cloth adhesive tape and a silica gel protective film. The graphite sheet is adopted as a heat-dissipating main body, the planar thermal conductivity of which is much higher than that of traditional copper foil and aluminum foil, and the heat-dissipating efficiency is higher, which is beneficial to the protection of electronic components; the sizes of the copper foil double-sided adhesive tape and the single-sided conductive cloth adhesive tape are larger than that of the graphite sheet and the graphite sheet is completely wrapped, which can prevent the graphite sheet from being broken and chipped; the copper foil double-sided adhesive tape and the single-sided conductive cloth adhesive tape both have good electric conductivity and shielding performance; the grid release film forms a grid print on the copper foil double-sided adhesive tape, which is beneficial to exhaust during lamination, and makes the lamination more flat and less likely to produce bubbles; the silica gel protective film is designed with low adhesion, and is not easy to produce residual glue when removed; the release film and the protective film are removed from the middle to both sides in three times, which can prevent the layers from being separated.

Description

Technical Field

[0001] This invention belongs to the field of heat dissipation technology, specifically relating to an ultra-high thermal conductivity graphite-based heat dissipation shielding composite structure and its application method. Background Technology

[0002] As the integration of electronic devices continues to increase, the requirements for heat dissipation and electromagnetic shielding of the internal electronic components of all-in-one desktop computers are also becoming more stringent. Currently, commonly used heat dissipation materials such as copper foil and aluminum foil have relatively limited heat dissipation capabilities, with copper foil having a thermal conductivity of approximately 398 W / (m·K) and aluminum foil approximately 237 W / (m·K).

[0003] Although graphite sheets have high planar thermal conductivity, they are brittle and prone to breakage and chipping.

[0004] Based on this, the present invention discloses an ultra-high thermal conductivity graphite-based heat dissipation shielding composite structure and its application method. Summary of the Invention

[0005] To address the problems in the prior art, the present invention aims to provide an ultra-high thermal conductivity graphite-based heat dissipation shielding composite structure and its application method.

[0006] To achieve the above objectives and technical effects, the technical solution adopted by this invention is as follows: The ultra-high thermal conductivity graphite-based heat dissipation shielding composite structure is attached to the inside of the back shell of a desktop all-in-one computer. It includes a grid release film, copper foil double-sided tape, graphite sheet, single-sided conductive cloth tape, and silicone protective film arranged in order from top to bottom.

[0007] Furthermore, the release force of the mesh release film is 1-5g / 25mm, the residual rate is ≥80%, and the release surface faces downward.

[0008] Furthermore, the copper foil double-sided adhesive tape has an adhesion of 700-1400 gf / inch, an impedance of ≤0.015 ohms, and a shielding effectiveness of 40-60 dB.

[0009] Furthermore, the thickness of the graphite sheet is 0.032±0.005mm, and the planar thermal conductivity is 1500±150W / (m·K).

[0010] Furthermore, the thickness of the single-sided conductive cloth tape is 0.055±0.01mm, the adhesion is >1000g / 25mm, the adhesive surface impedance is <0.1Ω / sq, the shielding effectiveness is 70-100dB, and the adhesive side faces upward.

[0011] Furthermore, the width and length of the copper foil double-sided tape and the single-sided conductive cloth tape are both greater than those of the graphite sheet, and the copper foil double-sided tape and the single-sided conductive cloth tape completely wrap the graphite sheet inside.

[0012] Furthermore, the silicone protective film has a thickness of 0.05±0.003mm, an adhesion of 10-15g / 25mm, and the adhesive side faces upward.

[0013] Furthermore, positioning holes are respectively opened at the same position at both ends of the mesh release film, copper foil double-sided adhesive tape, graphite sheet, single-sided conductive cloth tape and silicone protective film.

[0014] This invention also discloses a method for using an ultra-high thermal conductivity graphite-based heat dissipation shielding composite structure, comprising the following steps: First, use the two round holes on the silicone protective film to position it on the fixture. Then, remove the mesh release film from the middle to both sides in three steps. Attach the adhesive surface to the corresponding position on the back shell. Then, remove the silicone protective film from the middle to both sides in three steps.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1) Graphite sheets are used as the heat dissipation body, with a planar thermal conductivity of up to 1500±150W / (m·K), which is much higher than that of traditional copper foil and aluminum foil, resulting in higher heat dissipation efficiency and better protection of electronic components; 2) The dimensions of the copper foil double-sided tape and the single-sided conductive cloth tape are both larger than the graphite sheet, and they completely wrap the graphite sheet, which can effectively prevent the graphite sheet from breaking and shedding. 3) Both copper foil double-sided tape and single-sided conductive cloth tape have good conductivity and shielding properties, which can improve the overall electromagnetic shielding effect; 4) The grid release film forms a grid pattern on the copper foil double-sided tape, which facilitates air release during bonding, making the bonding smoother and less prone to air bubbles; 5) Locating holes are provided for easy positioning during assembly; 6) The silicone protective film adopts a low-tack design, which does not easily leave adhesive residue when removed; the release film and protective film are removed in three stages from the middle to both sides to prevent delamination between layers. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is an exploded view of the present invention. Detailed Implementation

[0017] The present invention will now be described in detail so that its advantages and features can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0018] The following provides a brief overview of one or more aspects to offer a basic understanding of them. This overview is not an exhaustive summary of all conceived aspects, nor is it intended to identify key or decisive elements of all aspects, nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form to prepare for the more detailed descriptions that follow.

[0019] like Figure 1-2 As shown, the present invention discloses an ultra-high thermal conductivity graphite-based heat dissipation shielding composite structure, which is attached to the inside of the back shell of a desktop all-in-one computer to play the role of heat dissipation and conductive shielding. It includes a grid release film 1, copper foil double-sided adhesive tape 2, graphite sheet 3, single-sided conductive cloth tape 4, and silicone protective film 5 arranged in order from top to bottom.

[0020] In some embodiments, the mesh release film 1 is an ultra-light mesh release film, model LDW36T105, which is semi-transparent, 0.09mm thick, has a release force of 1-5g / 25mm, a residual rate of ≥80%, and the release surface faces down.

[0021] In some embodiments, the copper foil double-sided tape 2 is an ultra-thin copper foil double-sided tape, resulting in lower impedance and improved conductivity and shielding performance. The copper foil double-sided tape 2 is model 3M 9772-20, copper-colored, 0.02mm thick, with an adhesion of 700-1400gf / inch, impedance ≤0.015ohms, and shielding effectiveness of 40-60dB. The mesh release film 1 imprints a mesh pattern on the copper foil double-sided tape 2, facilitating air release during bonding, resulting in a smoother bond and reducing the likelihood of air bubbles.

[0022] In some embodiments, the graphite sheet 3 is model number 21-670-0032, black, with a thickness of 0.032±0.005mm, a planar thermal conductivity of 1500±150W / (m·K), and an electrical conductivity of 4×10⁻⁶. 5 S / m, continuous operating temperature: -55~400℃, with ultra-high thermal conductivity, faster heat dissipation, which helps protect electronic components.

[0023] The present invention uses graphite sheet 3 as heat dissipation material. The planar thermal conductivity of graphite sheet 3 (1500±150W / (m·K)) is higher than that of traditional copper foil and aluminum foil (the thermal conductivity of copper foil is about 398W / (m·K) and that of aluminum foil is about 237W / (m·K)), resulting in faster heat dissipation.

[0024] In some embodiments, the single-sided conductive cloth tape 4 is model PS-1326, black, with a thickness of 0.055±0.01mm, adhesion: >1000g / 25mm, adhesive surface impedance: <0.1Ω / sq, shielding effectiveness (30MHZ-1.5GHZ): 70-100dB, with the adhesive side facing upwards, and has good conductivity and shielding performance.

[0025] In some embodiments, the width and length of the copper foil double-sided tape 2 and the single-sided conductive cloth tape 4 are both greater than those of the graphite sheet 3, thereby completely enclosing the graphite sheet 3 inside and preventing the graphite sheet 3 from breaking and shedding.

[0026] In some embodiments, the silicone protective film 5 is a low-tack PET silicone protective film, which is less likely to leave adhesive residue and makes it easier to remove the protective film after assembly. The silicone protective film 5 is model S5012L-38B, blue, with a thickness of 0.05±0.003mm, an adhesive strength of 10-15g / 25mm, and the adhesive side facing up.

[0027] In some embodiments, the copper foil double-sided adhesive tape 2 and the single-sided conductive cloth tape 4 are provided with clearance grooves at the same positions.

[0028] In some embodiments, the silicone protective film 5 is provided with pull tabs.

[0029] In some embodiments, positioning holes 6 are respectively opened at the same position at both ends of the mesh release film 1, copper foil double-sided adhesive tape 2, graphite sheet 3, single-sided conductive cloth tape 4, and silicone protective film 5.

[0030] This invention also discloses a method for using an ultra-high thermal conductivity graphite-based heat dissipation shielding composite structure, comprising the following steps: First, use the two positioning holes 6 on the silicone protective film 5 to position it on the fixture. Then, remove the mesh release film 1 from the middle to both sides in three steps (the purpose is to prevent the single-sided conductive cloth tape 4 and the silicone protective film 5 from delaminating). Attach the adhesive surface to the corresponding position of the back shell. Then, remove the silicone protective film 5 from the middle to both sides in three steps (the purpose is to prevent the copper foil double-sided tape 2 and the back shell from delaminating).

[0031] Example 1

[0032] like Figure 1-2 As shown, the ultra-high thermal conductivity graphite-based heat dissipation shielding composite structure is attached to the inside of the back shell of a desktop all-in-one computer, serving the functions of heat dissipation and conductive shielding. It includes a grid release film 1, copper foil double-sided tape 2, graphite sheet 3, single-sided conductive cloth tape 4, and silicone protective film 5 arranged in order from top to bottom.

[0033] The release film 1 is an ultra-lightweight mesh release film, model LDW36T105, which is semi-transparent, 0.09mm thick, with a release force of 3g / 25mm and a residual rate of 90%, with the release surface facing down.

[0034] Copper foil double-sided tape 2 uses ultra-thin copper foil double-sided tape, resulting in lower impedance and improved conductivity and shielding performance. The model number of copper foil double-sided tape 2 is 3M 9772-20, copper-colored, 0.02mm thick, with an adhesion of 1400gf / inch, impedance of 0.015 ohms, and shielding effectiveness of 40-60dB. The mesh release film 1 imprints a mesh pattern on the copper foil double-sided tape 2, facilitating air release during bonding, resulting in a smoother fit and reducing the likelihood of air bubbles.

[0035] Graphite sheet 3, model number 21-670-0032, is black, 0.032 mm thick, with a planar thermal conductivity of 1500 W / (m·K) and an electrical conductivity of 4 × 10⁻⁶. 5 With a thermal conductivity of S / m and a continuous operating temperature of -55~400℃, graphite sheet 3 exhibits extremely high thermal conductivity, resulting in faster heat dissipation and better protection of electronic components. As a heat dissipation material, graphite sheet 3 boasts a planar thermal conductivity of 1500±150W / (m·K), significantly higher than traditional copper and aluminum foils (copper foil has a thermal conductivity of approximately 398W / (m·K), and aluminum foil has a thermal conductivity of approximately 237W / (m·K)), leading to faster heat dissipation.

[0036] The single-sided conductive cloth tape 4 is model PS-1326, black, with a thickness of 0.055mm, adhesion: 1200g / 25mm, adhesive surface resistance: 0.08Ω / sq, shielding effectiveness (30MHZ-1.5GHZ): 90dB, with the adhesive side facing up, and has good conductivity and shielding performance.

[0037] The copper foil double-sided tape 2 and the single-sided conductive cloth tape 4 are both wider and longer than the graphite sheet 3, so that the copper foil double-sided tape 2 and the single-sided conductive cloth tape 4 can completely wrap the graphite sheet 3 inside, preventing the graphite sheet 3 from breaking and shedding.

[0038] Silicone Protective Film 5 uses low-tack PET silicone protective film, which is less likely to leave residue and makes it easier to remove after assembly. Silicone Protective Film 5 is model S5012L-38B, blue, 0.05mm thick, with an adhesive strength of 15g / 25mm, and the adhesive side should face up.

[0039] The copper foil double-sided tape 2 and the single-sided conductive cloth tape 4 are provided with clearance grooves at the same positions.

[0040] The silicone protective film 5 has a pull tab.

[0041] Positioning holes 6 are respectively opened at the same position on both ends of the mesh release film 1, copper foil double-sided adhesive tape 2, graphite sheet 3, single-sided conductive cloth tape 4, and silicone protective film 5.

[0042] The method of using ultra-high thermal conductivity graphite-based heat dissipation shielding composite structures includes the following steps: First, use the two positioning holes 6 on the silicone protective film 5 to position it on the fixture. Then, remove the mesh release film 1 from the middle to both sides in three steps (the purpose is to prevent the single-sided conductive cloth tape 4 and the silicone protective film 5 from delaminating). Attach the adhesive surface to the corresponding position of the back shell. Then, remove the silicone protective film 5 from the middle to both sides in three steps (the purpose is to prevent the copper foil double-sided tape 2 and the back shell from delaminating).

[0043] Any parts or structures not specifically described in this invention can be made using existing technologies or products, and will not be elaborated upon here.

[0044] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A graphite-based heat dissipation and shielding composite structure with ultra-high thermal conductivity, characterized in that, It is applied to the inside of the back cover of a desktop all-in-one computer and includes, from top to bottom, a mesh release film, copper foil double-sided tape, a graphite sheet, single-sided conductive cloth tape, and a silicone protective film.

2. The ultra-high thermal conductivity graphite-based heat dissipation and shielding composite structure according to claim 1, characterized in that, The release force of the mesh release film is 1-5g / 25mm, the residual rate is ≥80%, and the release surface is facing down.

3. The ultra-high thermal conductivity graphite-based heat dissipation and shielding composite structure according to claim 1, characterized in that, The copper foil double-sided adhesive tape has an adhesion of 700-1400 gf / inch, an impedance of ≤0.015 ohms, and a shielding effectiveness of 40-60 dB.

4. The ultra-high thermal conductivity graphite-based heat dissipation and shielding composite structure according to claim 1, characterized in that, The graphite sheet has a thickness of 0.032±0.005mm and a planar thermal conductivity of 1500±150W / (m·K).

5. The ultra-high thermal conductivity graphite-based heat dissipation and shielding composite structure according to claim 1, characterized in that, The single-sided conductive cloth tape has a thickness of 0.055±0.01mm, an adhesion of >1000g / 25mm, a surface impedance of <0.1Ω / sq, a shielding effectiveness of 70-100dB, and the adhesive side facing upwards.

6. The ultra-high thermal conductivity graphite-based heat dissipation and shielding composite structure according to claim 1, characterized in that, The width and length of the copper foil double-sided tape and the single-sided conductive cloth tape are both greater than the graphite sheet, and the copper foil double-sided tape and the single-sided conductive cloth tape completely wrap the graphite sheet inside.

7. The ultra-high thermal conductivity graphite-based heat dissipation and shielding composite structure according to claim 1, characterized in that, The silicone protective film has a thickness of 0.05±0.003mm, an adhesion of 10-15g / 25mm, and the adhesive side faces upward.

8. The ultra-high thermal conductivity graphite-based heat dissipation and shielding composite structure according to claim 1, characterized in that, Positioning holes are respectively opened at the same position at both ends of the mesh release film, copper foil double-sided adhesive tape, graphite sheet, single-sided conductive cloth tape and silicone protective film.

9. The method of using the ultra-high thermal conductivity graphite-based heat dissipation shielding composite structure according to any one of claims 1-8, characterized in that, Includes the following steps: First, use the two round holes on the silicone protective film to position it on the fixture. Then, remove the mesh release film from the middle to both sides in three steps. Attach the adhesive surface to the corresponding position on the back shell. Then, remove the silicone protective film from the middle to both sides in three steps.

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