Graphite flake assembly and electronic equipment

Abstract

The invention provides a graphite sheet assembly and electronic equipment, and belongs to the technical field of electronic equipment, and the graphite sheet assembly comprises a graphite sheet which comprises a dielectric layer; at least part of the reference ground circuit is arranged on the surface of the dielectric layer or located in the dielectric layer; at least part of the radio frequency circuit is arranged on the surface of the dielectric layer or located in the dielectric layer, and the radio frequency circuit and the reference ground circuit are spaced through part of the dielectric layer.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electronic equipment, and particularly relates to a graphite sheet assembly and an electronic equipment. BACKGROUND

[0002] In the related art, in order to improve the heat dissipation capability of the electronic equipment, a medium layer, that is, a pyrolytic graphite sheet (PGS), is usually arranged in the electronic equipment, for heat equalization and heat dissipation of the electronic equipment, and the medium layer usually occupies a large space in the electronic equipment, and the antenna and the radio frequency device in the electronic equipment often need to be connected through a coaxial line, and the space in the electronic equipment is increasingly compact, and the coaxial line also occupies a large space, which is not conducive to the layout in the electronic equipment.

[0003] As described above, the medium layer usually only has the functions of heat equalization and heat dissipation, and the coaxial line usually only has the function of signal transmission, and the two components have single functions, which is not conducive to the layout in the electronic equipment. SUMMARY

[0004] The purpose of the embodiments of the present application is to provide a graphite sheet assembly and an electronic equipment, which can solve the technical problem of single function of the medium layer and the coaxial line.

[0005] In a first aspect, the embodiments of the present application provide a graphite sheet assembly, comprising:

[0006] a graphite sheet, the graphite sheet comprising a medium layer;

[0007] a reference ground line, at least part of the reference ground line being arranged on a surface of the medium layer or in the interior of the medium layer;

[0008] a radio frequency line, at least part of the radio frequency line being arranged on the surface of the medium layer or in the interior of the medium layer, and the radio frequency line and the reference ground line being spaced apart by part of the medium layer.

[0009] In a second aspect, the embodiments of the present application provide an electronic equipment, comprising:

[0010] a first circuit board and a second circuit board; and

[0011] the graphite sheet assembly provided in the first aspect;

[0012] The reference ground line of the graphite sheet assembly is connected to the first circuit board and the second circuit board, and the radio frequency line of the graphite sheet assembly is connected to the first circuit board and the second circuit board.

[0013] In the embodiments of the present application, the graphite sheet assembly comprises the graphite sheet, the reference ground line and the radio frequency line, and the graphite sheet has the functions of heat equalization and heat dissipation.

[0014] The graphite sheet comprises a dielectric layer, and a reference ground line and a radio frequency line are arranged on the dielectric layer, so that the radio frequency signal can be transmitted, that is, the graphite sheet assembly can realize the functions of heating and cooling and the function of transmitting the radio frequency signal, thereby enriching the functions of the graphite sheet assembly. BRIEF DESCRIPTION OF DRAWINGS

[0015] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings in which:

[0016] Figure 1 A schematic diagram of a graphite sheet assembly provided by one embodiment of the present application is shown;

[0017] Figure 2 One of cross-sectional views of a graphite sheet assembly provided by one embodiment of the present application is shown;

[0018] Figure 3 A cross-sectional view of a dielectric layer in a graphite sheet assembly provided by one embodiment of the present application is shown;

[0019] Figure 4 One of schematic diagrams of a dielectric layer in a graphite sheet assembly provided by one embodiment of the present application is shown;

[0020] Figure 5 The second one of schematic diagrams of a dielectric layer in a graphite sheet assembly provided by one embodiment of the present application is shown;

[0021] Figure 6 The second one of cross-sectional views of a graphite sheet assembly provided by some embodiments of the present application is shown;

[0022] Figure 7 The third one of cross-sectional views of a graphite sheet assembly provided by some embodiments of the present application is shown;

[0023] Figure 8 The fourth one of cross-sectional views of a graphite sheet assembly provided by some embodiments of the present application is shown;

[0024] Figure 9 A schematic diagram of an electronic device provided by one embodiment of the present application is shown;

[0025] Figure 10 A cross-sectional view of an electronic device provided by one embodiment of the present application is shown;

[0026] Figure 11 A schematic diagram of a first circuit board and a graphite sheet assembly in an electronic device provided by one embodiment of the present application is shown;

[0027] Figure 12 A schematic diagram of a first circuit board, a battery and a second circuit board in an electronic device provided by one embodiment of the present application is shown.

[0028] Figures 1 to 12 Reference signs:

[0029] 100 graphite sheet assembly, 110 graphite sheet, 112 medium layer, 1122 first groove, 1124 second groove, 114 silicon dioxide layer, 116 graphite layer, 120 reference ground line, 122 first line, 124 second line, 126 third line, 128 first connecting part, 130 second connecting part, 132 fourth line, 134 fifth line, 136 third connecting part, 138 fourth connecting part, 140 first contact part, 150 radio frequency line, 152 second contact part, 160 first insulating layer, 170 second insulating layer, 200 electronic device, 210 first circuit board, 212 first elastic sheet, 214 second elastic sheet, 216 first device, 220 second circuit board, 222 third elastic sheet, 224 fourth elastic sheet, 226 second device, 230 battery. DETAILED DESCRIPTION

[0030] Embodiments of the present application will be described in detail below with reference to examples thereof as shown in the accompanying drawings, wherein the same or similar components or components having the same or similar functions are denoted throughout the drawings by the same or similar reference numerals. The embodiments described below with reference to the accompanying drawings are exemplary and are for the purpose of explanation of the present application only, and should not be understood as limiting the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor fall within the scope of the present application.

[0031] The terms "first", "second" in the description and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally means that the front and rear associated objects are in an "or" relationship.

[0032] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0033] In the description of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "mount", "connect", "connection" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] The following describes the graphite sheet assembly 100 and the electronic device 200 according to the embodiments of the present application. Figures 1 to 12 The following describes the graphite sheet assembly 100 and the electronic device 200 according to the embodiments of the present application.

[0035] In the first aspect, as shown in Figure 1 , Figure 2 and Figure 6 , the embodiments of the present application provide a graphite sheet assembly 100, comprising: a graphite sheet 110, the graphite sheet 110 comprising a dielectric layer 112; a reference ground line 120, at least part of the reference ground line 120 being arranged on the surface of the dielectric layer 112 or being arranged inside the dielectric layer 112; a radio frequency line 150, at least part of the radio frequency line 150 being arranged on the surface of the dielectric layer 112 or being arranged inside the dielectric layer 112, the radio frequency line 150 and the reference ground line 120 being separated by part of the dielectric layer 112.

[0036] In the embodiments of the present application, the graphite sheet assembly 100 comprises the graphite sheet 110, the reference ground line 120 and the radio frequency line 150, and the graphite sheet 110 has the functions of heat equalization and heat dissipation.

[0037] The graphite sheet 110 comprises the dielectric layer 112, and the reference ground line 120 and the radio frequency line 150 are arranged on the dielectric layer 112, thereby realizing the transmission of radio frequency signals, that is, the graphite sheet assembly 100 can realize the functions of heat equalization and heat dissipation, and can also realize the function of radio frequency signal transmission, thereby enriching the functions of the graphite sheet assembly 100.

[0038] Specifically, at least part of the reference ground line 120 is arranged on the surface of the dielectric layer 112, and at least part of the radio frequency line 150 is arranged on the surface of the dielectric layer 112; at least part of the reference ground line 120 is arranged inside the dielectric layer 112, and at least part of the radio frequency line 150 is arranged on the surface of the dielectric layer 112; at least part of the reference ground line 120 is arranged inside the dielectric layer 112, and at least part of the radio frequency line 150 is arranged inside the dielectric layer 112; at least part of the reference ground line 120 is arranged on the surface of the dielectric layer 112, and at least part of the radio frequency line 150 is arranged on the surface of the dielectric layer 112.

[0039] Exemplarily, the graphite sheet 110 can only include the dielectric layer 112, or the graphite sheet 110 can include other functional layers in addition to the dielectric layer 112.

[0040] The reference ground line 120 can be manufactured by using a microstrip line or a strip line, or can be manufactured by using other conductive lines.

[0041] The graphite sheet assembly 100 usually has a large area, because the graphite sheet assembly 100 helps to solve the heat dissipation problem of the electronic device 200. The graphite sheet 110 has high thermal conductivity, can uniformly spread heat from one point to the entire area, realizes large-area heat dissipation, and effectively reduces the temperature inside the electronic device 200, thereby ensuring the stable operation of the electronic device 200. In addition, the graphite sheet 110 has good flexibility and can easily adapt to the complex structure inside the electronic device 200, thereby realizing high-standard heat dissipation. Therefore, the graphite sheet assembly 100 with a large-area scheme is usually used in the electronic device 200 to cover most important areas.

[0042] In the related art, because the coaxial line usually needs to avoid external devices, the length of the coaxial line can be more than 1.5 times the straight-line length between two devices that need to transmit signals. Because the graphite sheet assembly 100 has a large area and covers more areas inside the electronic device 200, direct connection between two devices can be realized, external devices do not need to be avoided, and the length of the wire can be effectively shortened, thereby improving the problem of large insertion loss caused by too long coaxial wire.

[0043] Specifically, because the dielectric constant of the graphite sheet 110 is mainly related to the frequency and thickness, etc. The frequency characteristic research shows that in the range of 1 MHz to 1 THz, the dielectric loss peak of the graphite sheet 110 appears near 30 GHz, which corresponds to the characteristic frequency of 1 of the collective oscillation of π electrons in the graphite sheet 110. In terms of thickness effect, the real part of the dielectric constant of the single-layer graphite sheet 110 is 3.0.

[0044] The dielectric constant of the common board material that can realize high-speed radio frequency signals is as follows:

[0045] Main board glass fiber cloth base: such as FR-4 type glass fiber cloth base, whose dielectric constant is between 4.2 and 4.9.

[0046] Flexible printed circuit (FPC) polyimide resin (PI): its dielectric constant is about 3.4 to 3.5.

[0047] Bismaleimide triazine (BT): its dielectric constant is about 3.5.

[0048] The characteristic impedance formula of the microstrip line is:

[0049]

[0050] wherein Z0 represents the characteristic impedance of the microstrip line, in ohms (Ω).

[0051] ε represents the dielectric constant, reflecting the equivalent dielectric constant of the medium substrate and air together, which is usually inversely proportional to the impedance, that is, the higher the dielectric constant, the smaller the impedance, and the lower the dielectric constant, the larger the impedance.

[0052] h represents the thickness of the medium substrate, that is, the distance between the microstrip line conductor and the reference ground plane, and the thickness of the medium substrate is directly proportional to the impedance.

[0053] w represents the width of the microstrip line, and generally the wider the microstrip line, the larger the impedance, and the narrower the microstrip line, the smaller the impedance.

[0054] That is, by adjusting the dielectric constant of the graphite sheet 110, the thickness or number of layers of the graphite sheet 110, or the width of the microstrip line, the impedance matching of the characteristic radio frequency trace can be achieved, and thus a good radio frequency connection effect can be achieved.

[0055] As described above, by adjusting certain parameters, the graphite sheet 110 can be used as a substrate, and a radio frequency line can be arranged thereon, so that the whole forms a structure similar to a radio frequency circuit board, so that the graphite sheet assembly 100 has both heating and cooling functions and a function of transmitting radio frequency signals. That is, the dielectric constant of the graphite sheet 110 can be adjusted by various means as needed.

[0056] As shown in Figure 2 and Figure 3 As a possible implementation, the surface of the dielectric layer 112 has a first groove 1122, and the reference ground line 120 is arranged in the first groove 1122; the surface of the dielectric layer 112 has a second groove 1124, and the radio frequency line 150 is arranged in the second groove 1124; or the radio frequency line 150 is arranged inside the dielectric layer 112.

[0057] Specifically, in the case that at least part of the reference ground line 120 is arranged on the surface of the dielectric layer 112, the surface of the dielectric layer 112 is provided with a first groove 1122, and at least part of the reference ground line 120 is arranged in the first groove 1122. The reference ground line 120 is accommodated in the first groove 1122, so that the reference ground line 120 is more stable, and the flatness of the outside of the dielectric layer 112 can be achieved, reducing the possibility of the reference ground line 120 protruding from one side of the dielectric layer 112, which helps to reduce the space occupied by the graphite sheet assembly 100. Exemplarily, the shape of the first groove 1122 matches the shape of the reference ground line 120, and the reference ground line 120 is completely embedded in the first groove 1122.

[0058] In the case that at least part of the radio frequency line 150 is arranged on the surface of the dielectric layer 112, the surface of the dielectric layer 112 is provided with a second groove 1124, and at least part of the radio frequency line 150 is arranged in the second groove 1124. The radio frequency line 150 is accommodated by the second groove 1124, so that the radio frequency line 150 is more stable, and the flatness outside the dielectric layer 112 can be achieved, which reduces the possibility of the radio frequency line 150 protruding from one side of the dielectric layer 112, and helps to reduce the space occupied by the graphite sheet assembly 100. Exemplarily, the shape of the second groove 1124 matches the shape of the radio frequency line 150, and the radio frequency line 150 is completely embedded in the second groove 1124.

[0059] Exemplarily, as shown in Figure 2 and Figure 6 , the reference ground line 120 located in the first groove 1122 and the radio frequency line 150 located in the second groove 1124 are arranged in parallel, which is conducive to controlling the impedance of the radio frequency line 150, thereby ensuring the reliability of signal transmission.

[0060] As a possible implementation, as shown in Figure 4 , the dielectric layer 112 includes at least two graphite layers 116 arranged in a stack; or as shown in Figure 5 , the dielectric layer 112 includes at least one graphite layer 116 and at least one silicon dioxide layer 114 arranged in an alternating stack.

[0061] Specifically, as shown in Figure 4 , the dielectric layer 112 includes at least two graphite layers 116 arranged in a stack. Since the dielectric constant is related to the thickness, by increasing the number of graphite layers 116, the dielectric constant of the dielectric layer 112 can be adjusted so that the dielectric constant of the dielectric layer 112 meets the requirements of signal transmission, thereby ensuring the reliability of signal transmission of the reference ground line 120 and the radio frequency line 150.

[0062] Among them, the dielectric constant of a single graphite layer 116 is usually 3, but when the number of layers increases to 10 layers, the dielectric constant can reach 8.5.

[0063] Alternatively, as shown in Figure 5 , the dielectric layer 112 includes at least one graphite layer 116 and at least one silicon dioxide layer 114 arranged in an alternating stack, realizing a heterostructure, thereby adjusting the dielectric constant of the dielectric layer 112 so that the dielectric constant of the dielectric layer 112 meets the requirements of signal transmission, thereby ensuring the reliability of signal transmission of the reference ground line 120 and the radio frequency line 150.

[0064] In other words, through multi-layer structure design, a heterogeneous structure can be constructed by alternately stacking graphite layer 116 and silicon dioxide layer 114 (the dielectric constant of silicon dioxide layer 114 is 3.9), thereby stacking different numbers of layers.

[0065] As shown above, the equivalent dielectric constant of the graphite layer 116 can be continuously adjusted in the range of 5.2 to 11.7 by stacking the graphite layer 116.

[0066] For example, the graphite sheet 110 may be formed by stacking multiple graphite layers 116, except that the dielectric layer 112 includes a portion of the multiple graphite layers 116.

[0067] As one possible implementation, the dielectric layer 112 is doped with modified materials to reduce the dielectric loss of the dielectric layer 112, thereby ensuring the reliability of signal transmission between the reference ground line 120 and the radio frequency line 150.

[0068] In other words, the electrical properties of the dielectric layer 112 can be optimized through doping modification. For example, when doped with a certain boron concentration, the dielectric loss of the graphite layer 116 can be reduced by more than 40%, while maintaining the in-plane dielectric constant within a constant range.

[0069] The modified materials include, but are not limited to, carbide ceramics, nitrides and carbides. For example, the modified materials may be alumina, silicon oxide, silicon nitride, boron nitride or boron, etc.

[0070] In other words, the dielectric loss of the dielectric layer 112 can be adjusted as needed through various means.

[0071] like Figure 7 As shown, in one possible implementation, the reference ground line 120 includes: a first line 122 along the thickness direction of the graphite sheet 110, the orthogonal projection of the radio frequency line 150 onto the first line 122, and a second line 124 and a third line 126 along a direction perpendicular to the thickness of the graphite sheet 110, the second line 124 and the third line 126 being located on opposite sides of the radio frequency line 150; wherein, the first line 122 and the second line 124 are electrically connected, and the first line 122 and the third line 126 are electrically connected.

[0072] Specifically, the reference ground line 120 includes a first line 122, a second line 124 and a third line 126, the first line 122 is located in the positive projection of the radio frequency line 150 along the thickness direction OZ of the graphite sheet 110, and the second line 124 and the third line 126 are respectively located on the two sides of the radio frequency line 150 along the direction OX perpendicular to the thickness of the graphite sheet 110, the first line 122 and the second line 124 are electrically connected, and the first line 122 and the third line 126 are electrically connected. That is, the first line 122, the second line 124 and the third line 126 are respectively located in three directions of the radio frequency line 150, thereby forming a half-enclosure of the radio frequency line 150, and the first line 122, the second line 124 and the third line 126 are electrically connected, so that the impedance of the reference ground line 120 can be better controlled.

[0073] As shown in Figure 7 As a possible implementation, the reference ground line 120 further includes a first connecting part 128 embedded in the dielectric layer 112, the first connecting part 128 is connected to the first line 122 and the second line 124, and the first connecting part 128 is a columnar structure or a ring structure; and a second connecting part 130 embedded in the dielectric layer 112, the second connecting part 130 is connected to the first line 122 and the third line 126, and the second connecting part 130 is a columnar structure or a ring structure.

[0074] Specifically, the reference ground line 120 further includes a first connecting part 128 and a second connecting part 130, the first connecting part 128 is embedded in the dielectric layer 112, the first connecting part 128 is connected to the first line 122 and the second line 124, and the first connecting part 128 is a columnar structure or a ring structure, and the number of the first connecting part 128 can be multiple, and the multiple first connecting parts 128 are arranged along the extension direction of the first line 122, thereby realizing the electrical connection between the first line 122 and the second line 124 through a simple structure, and reducing the processing difficulty of the graphite sheet assembly 100.

[0075] The second connecting part 130 is embedded in the dielectric layer 112, the second connecting part 130 is connected to the first line 122 and the third line 126, and the second connecting part 130 is a columnar structure or a ring structure, and the number of the second connecting part 130 can be multiple, and the multiple second connecting parts 130 are arranged along the extension direction of the first line 122, thereby realizing the electrical connection between the first line 122 and the third line 126 through a simple structure, and reducing the processing difficulty of the graphite sheet assembly 100.

[0076] Exemplarily, the first connecting part 128 can be a via, a copper skin or other conductive structure. The second connecting part 130 can be a via, a copper skin or other conductive structure.

[0077] As shown in Figure 8As shown, as a possible implementation, the reference ground line 120 includes: a fourth line 132 and a fifth line 134, the fourth line 132 and the fifth line 134 are respectively located on both sides of the radio frequency line 150 along the thickness direction of the graphite sheet 110, the orthogonal projection of the radio frequency line 150 to the fourth line 132 falls on the fourth line 132, and the orthogonal projection of the radio frequency line 150 to the fifth line 134 falls on the fifth line 134; wherein at least part of the radio frequency line 150 is located inside the dielectric layer 112.

[0078] Specifically, the reference ground line 120 includes the fourth line 132 and the fifth line 134, and the fourth line 132 and the fifth line 134 are respectively located on both sides of the radio frequency line 150 along the thickness direction OZ of the graphite sheet 110, so that the radio frequency line 150 is completely covered in the thickness direction OZ of the graphite sheet 110, and the fourth line 132 and the fifth line 134 are electrically connected. The above arrangement not only better controls the impedance of the reference ground line 120, but also improves the shielding effect of the radio frequency line 150.

[0079] As shown, Figure 8 As a possible implementation, the reference ground line 120 further includes: a third connecting portion 136 embedded in the dielectric layer 112, the third connecting portion 136 is connected to the fourth line 132 and the fifth line 134, and the third connecting portion 136 is a columnar structure or a ring structure; and a fourth connecting portion 138 embedded in the dielectric layer 112, the fourth connecting portion 138 is connected to the fourth line 132 and the fifth line 134, and the fourth connecting portion 138 is a columnar structure or a ring structure; wherein along the direction perpendicular to the thickness of the graphite sheet 110, the third connecting portion 136 and the fourth connecting portion 138 are respectively located on both sides of the radio frequency line 150.

[0080] Specifically, the reference ground line 120 further includes the third connecting portion 136 and the fourth connecting portion 138, the third connecting portion 136 is embedded in the dielectric layer 112, the third connecting portion 136 is connected to the fourth line 132 and the fifth line 134, and the third connecting portion 136 is a columnar structure or a ring structure. The number of the third connecting portion 136 can be multiple, and the multiple third connecting portions 136 are arranged at intervals along the extension direction of the fourth line 132, so as to realize the electrical connection between the fourth line 132 and the fifth line 134 through a simple structure, and reduce the processing difficulty of the graphite sheet assembly 100.

[0081] The fourth connecting part 138 is embedded in the dielectric layer 112, and is connected to the fourth line 132 and the fifth line 134. The fourth connecting part 138 has a columnar structure or a ring structure, and the number of the fourth connecting part 138 can be multiple. The multiple fourth connecting parts 138 are arranged along the extension direction of the fourth line 132, so that the electrical connection between the fourth line 132 and the fifth line 134 is achieved by a simple structure, and the processing difficulty of the graphite sheet assembly 100 is reduced.

[0082] In the direction OX perpendicular to the thickness of the graphite sheet 110, the third connecting part 136 and the fourth connecting part 138 are respectively located on the two sides of the radio frequency line 150, so as to ensure the consistency of each position of the fourth line 132 and the fifth line 134, better control the impedance of the reference ground line 120, and ensure the shielding effect on the radio frequency line 150.

[0083] Exemplarily, the third connecting part 136 can be a via, a copper sheet or other conductive structure. The fourth connecting part 138 can be a via, a copper sheet or other conductive structure.

[0084] As shown in Figure 2 , Figure 6 , Figure 7 and Figure 8 , as a possible implementation, the graphite sheet assembly 100 further comprises: a first insulating layer 160 and a second insulating layer 170, which are respectively arranged on the two sides of the graphite sheet 110 along the thickness direction of the graphite sheet 110; wherein the reference ground line 120 comprises at least two first contact parts 140, and the radio frequency line 150 comprises at least two second contact parts 152, and the first insulating layer 160 avoids the first contact part 140 and the second contact part 152.

[0085] Specifically, the graphite sheet assembly 100 further comprises the first insulating layer 160 and the second insulating layer 170, which are respectively arranged on the two sides of the graphite sheet 110, so as to protect the graphite sheet 110, avoid the influence of the graphite sheet 110 on other components, reduce the influence of other components on the graphite sheet 110, and also reduce the probability of damage of the graphite sheet 110 and the like.

[0086] In addition, the first insulating layer 160 and the second insulating layer 170 are also located outside the reference ground line 120 and the radio frequency line 150, so as to protect the reference ground line 120 and the radio frequency line 150, avoid the influence of the reference ground line 120 and the radio frequency line 150 on other components, and reduce the influence of other components on the reference ground line 120 and the radio frequency line 150.

[0087] Exemplarily, the first insulating layer 160 and the second insulating layer 170 can be plastic materials.

[0088] The reference ground line 120 includes at least two first contact portions 140, through which different devices can be connected respectively, and the radio frequency line 150 includes at least two second contact portions 152, through which different devices can be connected respectively.

[0089] As shown in Figure 2 , as a possible implementation, the at least two first contact portions 140 are respectively located at two ends of the reference ground line 120, and the at least two second contact portions 152 are respectively located at two ends of the radio frequency line 150.

[0090] Specifically, the at least two first contact portions 140 are respectively located at two ends of the reference ground line 120, and the overall structure is simple, thereby reducing the production cost.

[0091] The at least two second contact portions 152 are respectively located at two ends of the radio frequency line 150, and the overall structure is simple, thereby reducing the production cost.

[0092] As shown in Figure 2 , as a possible implementation, the first contact portion 140 and the second contact portion 152 extend to the same side.

[0093] Specifically, the first contact portion 140 and the second contact portion 152 extend to the same side, so that the reference ground line 120 and the radio frequency line 150 are connected to external devices on the same side of the graphite sheet assembly 100, and the graphite sheet assembly 100 is convenient to adhere to the display screen, the battery 230 cover or the frame of the electronic device 200 for heat dissipation.

[0094] The second aspect, as shown in Figure 9 , Figure 10 and Figure 11 , the embodiment of the present application provides an electronic device 200, which comprises: a first circuit board 210 and a second circuit board 220; and a graphite sheet assembly 100 as provided in the embodiment of the first aspect; wherein the reference ground line 120 of the graphite sheet assembly 100 is connected to the first circuit board 210 and the second circuit board 220, and the radio frequency line 150 of the graphite sheet assembly 100 is connected to the first circuit board 210 and the second circuit board 220.

[0095] In the embodiment of the present application, the electronic device 200 comprises a first circuit board 210, a second circuit board 220 and a graphite sheet assembly 100 as provided in the embodiment of the first aspect, and the graphite sheet assembly 100 is used to realize the signal transmission between the first circuit board 210 and the second circuit board 220.

[0096] The electronic device 200 provided by the embodiment of the present application comprises the graphite sheet assembly 100 provided by the embodiment of the first aspect, and thus has all the beneficial effects of the graphite sheet assembly 100 provided by the embodiment of the first aspect, which will not be repeated here.

[0097] The electronic device 200 comprises a frame and a circuit board, the circuit board is fixed to the frame, and the graphite sheet assembly 100 is fixed to at least one of the frame and the circuit board.

[0098] Specifically, a part of the at least two first contact portions 140 of the graphite sheet assembly 100 is electrically connected to the first circuit board 210, another part of the at least two first contact portions 140 of the graphite sheet assembly 100 is electrically connected to the second circuit board 220, a part of the at least two second contact portions 152 of the graphite sheet assembly 100 is electrically connected to the first circuit board 210, and another part of the at least two second contact portions 152 of the graphite sheet assembly 100 is electrically connected to the second circuit board 220.

[0099] As shown in Figure 9 , Figure 10 , Figure 11 and Figure 12 , the electronic device 200 further comprises a battery 230, the battery 230 is located between the first circuit board 210 and the second circuit board 220, the graphite sheet assembly 100 is located on the same side of the first circuit board 210, the second circuit board 220 and the battery 230, and spans the battery 230 to realize communication between the first circuit board 210 and the second circuit board 220, and also helps heat dissipation of the first circuit board 210, the second circuit board 220 and the battery 230.

[0100] The first circuit board 210 is provided with a first device 216, and the second circuit board 220 is provided with a second device 226.

[0101] The first circuit board 210 can be a main board, and the second circuit board 220 can be a sub-board.

[0102] As shown in Figure 10 , as a possible implementation, the first circuit board 210 comprises a first spring 212 and a second spring 214, the first spring 212 is in contact with the first contact portion 140 of the graphite sheet assembly 100, and the second spring 214 is in contact with the second contact portion 152 of the graphite sheet assembly 100; the second circuit board 220 comprises a third spring 222 and a fourth spring 224, the third spring 222 is in contact with the first contact portion 140 of the graphite sheet assembly 100, and the fourth spring 224 is in contact with the second contact portion 152 of the graphite sheet assembly 100.

[0103] Specifically, the first circuit board 210 includes a first spring sheet 212 and a second spring sheet 214, the first spring sheet 212 is in contact with the at least one first contact part 140 by pre-pressing, and the second spring sheet 214 is in contact with the at least one second contact part 152, thereby ensuring the reliability of the connection between the first circuit board 210 and the first contact part 140 and the second contact part 152, and reducing the possibility of false connection.

[0104] The second circuit board 220 includes a third spring sheet 222 and a fourth spring sheet 224, the third spring sheet 222 is in contact with the at least one first contact part 140 by pre-pressing, and the fourth spring sheet 224 is in contact with the at least one second contact part 152, thereby ensuring the reliability of the connection between the second circuit board 220 and the first contact part 140 and the second contact part 152, and reducing the possibility of false connection.

[0105] Exemplarily, the electronic device 200 includes the first circuit board 210, the second circuit board 220, the battery 230, the graphite sheet assembly 100, and the like, the graphite sheet assembly 100 is connected to the first circuit board 210 and the second circuit board 220 through the reference ground line 120 and the radio frequency line 150 respectively, thereby realizing the transmission of the radio frequency signal between the first circuit board 210 and the second circuit board 220. That is, by taking the medium layer 112 in the graphite sheet assembly 100 as a medium material, effective transmission of the radio frequency signal on the graphite sheet assembly 100 is realized. The graphite sheet assembly 100 covers at least part of the area of the first circuit board 210, the battery 230, and the second circuit board 220, and can maximize the efficiency of the radio frequency direct connection between the first circuit board 210 and the second circuit board 220. By taking the medium layer 112 as a medium material, direct connection between the radio frequency test seat of the first circuit board 210 and the second circuit board 220 can be realized, and the pain points of large insertion loss caused by long coaxial line and additional space occupied by the coaxial line can be improved.

[0106] Specifically, as shown in Figure 1 , Figure 8 and Figure 11 , one first contact part 140 and one second contact part 152 on the graphite sheet assembly 100 can be connected and arranged corresponding to the first circuit board 210, and another first contact part 140 and another second contact part 152 on the graphite sheet assembly 100 can be connected and arranged corresponding to the second circuit board 220, wherein the first contact part 140 and the first contact part 140 are in conduction, and the second contact part 152 and the second contact part 152 are in conduction, and by taking the radio frequency line on the medium layer 112, the shortest distance between two points can be directly realized.

[0107] The above graphite sheet assembly 100 can achieve the RF direct connection between the first circuit board 210 and the second circuit board 220 with the maximum efficiency, improve the problem of large insertion loss caused by the long coaxial line, and solve the problem of extra space occupied by the coaxial line.

[0108] The electronic device 200 can be a terminal, or can be other devices than the terminal. For example, the electronic device 200 can be a mobile phone, a tablet computer, a notebook computer, a palm computer, a music playing device, a private network communication terminal device (e.g., a walkie-talkie), a mobile internet device (MID), an augmented reality / virtual reality / mixed reality device, a robot, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA), etc., and the embodiments of the present application are not limited thereto.

[0109] In the description of the present specification, the description referring to the terms "one embodiment", or "a specific embodiment", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0110] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made thereto without departing from the principles and spirit of the present application, the scope of which is defined by the following claims and their equivalents.

Claims

1. A graphite sheet assembly, characterized by, The graphite sheet comprises a dielectric layer, a reference ground line, and a radio frequency line. The reference ground line is at least partially disposed on the surface of the dielectric layer or inside the dielectric layer. The radio frequency line is at least partially disposed on the surface of the dielectric layer or inside the dielectric layer, and the radio frequency line and the reference ground line are separated by part of the dielectric layer.

2. The graphite sheet assembly according to claim 1, wherein the surface of the dielectric layer has a first groove in which the reference ground line is disposed; and / or the surface of the dielectric layer has a second groove in which the radio frequency line is disposed; or the radio frequency line is disposed inside the dielectric layer.

3. The graphite sheet assembly according to claim 1, wherein the dielectric layer comprises at least two graphite layers stacked; or the dielectric layer comprises at least one graphite layer and at least one silicon dioxide layer alternately stacked. The reference ground line comprises a first line, a second line, and a third line. The first line is along the thickness direction of the graphite sheet, and the radio frequency line is projected onto the first line. The second line and the third line are on both sides of the radio frequency line along a direction perpendicular to the thickness of the graphite sheet. The first line and the second line are electrically connected, and the first line and the third line are electrically connected. The reference ground line further comprises a first connecting part and a second connecting part.

4. The graphite sheet assembly of any one of claims 1 to 3, wherein, The first connecting part is embedded in the dielectric layer and connected to the first line and the second line, and is a columnar structure or a ring structure. The second connecting part is embedded in the dielectric layer and connected to the first line and the third line, and is a columnar structure or a ring structure. The reference ground line comprises a fourth line and a fifth line. The fourth line and the fifth line are on both sides of the radio frequency line along the thickness direction of the graphite sheet, and the radio frequency line is projected onto the fourth line and the fifth line.

5. The graphite sheet assembly of claim 4, wherein, At least part of the radio frequency line is inside the dielectric layer. The reference ground line further comprises a third connecting part and a fourth connecting part. The third connecting part is embedded in the dielectric layer and connected to the fourth line and the fifth line, and is a columnar structure or a ring structure.

6. The graphite sheet assembly of any one of claims 1 to 3, wherein, The fourth connecting part is embedded in the dielectric layer and connected to the fourth line and the fifth line, and is a columnar structure or a ring structure. The third connecting part and the fourth connecting part are on both sides of the radio frequency line along a direction perpendicular to the thickness of the graphite sheet. The graphite sheet assembly further comprises a first insulating layer and a second insulating layer.

7. The graphite sheet assembly of claim 6, wherein, The first insulating layer and the second insulating layer are disposed on both sides of the graphite sheet along the thickness direction of the graphite sheet. ​ ​ ​ 8. The graphite sheet assembly of any one of claims 1 to 3, wherein, ​ ​ The reference ground line includes at least two first contact portions, and the radio frequency line includes at least two second contact portions. The first insulating layer avoids the first contact portions and the second contact portions.

9. An electronic device, comprising: The electronic device comprises: a first circuit board and a second circuit board; and a graphite sheet assembly as claimed in any one of claims 1 to 8. The reference ground line of the graphite sheet assembly is connected to the first circuit board and the second circuit board, and the radio frequency line of the graphite sheet assembly is connected to the first circuit board and the second circuit board.

10. The electronic device of claim 9, wherein the first circuit board comprises a first spring and a second spring, the first spring being in contact with the first contact portion of the graphite sheet assembly, and the second spring being in contact with the second contact portion of the graphite sheet assembly; and the second circuit board comprises a third spring and a fourth spring, the third spring being in contact with the first contact portion of the graphite sheet assembly, and the fourth spring being in contact with the second contact portion of the graphite sheet assembly. ​

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