CN115565729A

CN115565729A - Signal wire and manufacturing method thereof

Info

Publication number: CN115565729A
Application number: CN202110749719.5A
Authority: CN
Inventors: 施养明; 许宏源; 许家铭
Original assignee: Amazing Cool Technology Co ltd
Current assignee: Amazing Cool Technology Co ltd
Priority date: 2021-07-02
Filing date: 2021-07-02
Publication date: 2023-01-03

Abstract

The invention provides a signal wire and a manufacturing method thereof, wherein the signal wire comprises a conductive wire core and a graphene copper layer, and the graphene copper layer is in a foil shape and wraps the conductive wire core. The graphene copper layer is coated on the outer surface of the conductive wire core, so that the overall conductivity of the signal wire can be improved, and the transmission impedance of high-frequency signals can be effectively reduced.

Description

Signal wire and manufacturing method thereof

Technical Field

The present invention relates to signal lines, and more particularly, to a signal line for reducing impedance of high frequency signal transmission and a method for manufacturing the same.

Background

The conventional signal wires are usually copper wires or aluminum wires, because the copper and aluminum materials have good electrical conductivity (i.e., low resistance) and the price of the materials is relatively low. When transmitting high frequency signals, it is necessary to use a conductive wire made of a conductive material with lower resistance to reduce signal loss. Therefore, high frequency signals can be transmitted by using silver wires, but the silver material has much higher price than copper and aluminum materials, so the economic benefit is not good.

In view of the above, the present inventors have made extensive studies and studies to solve the above problems in combination with the application of the above prior art, and as a result, the present inventors have improved the present invention.

Disclosure of Invention

The invention provides a signal wire for reducing high-frequency signal transmission impedance and a manufacturing method thereof.

The invention provides a signal wire, which comprises a conductive wire core and a graphene copper layer, wherein the graphene copper layer is in a foil shape and wraps the conductive wire core.

In the signal wire of the present invention, the conductive wire core is made of copper, aluminum or graphene copper. The graphene copper layer comprises a copper body and a graphene layer embedded in the copper body, and the graphene layer extends along the graphene copper layer. The thickness of the graphene copper layer is less than 0.1mm. The signal wire has a cross-sectional diameter, and the graphene copper layer has a thickness less than 10% of the cross-sectional diameter.

The present invention also provides a method for manufacturing signal wires, which comprises the following steps. A conductive core is provided. Pressing a graphene copper material into a graphene copper layer. And coating the conductive wire core with the graphene copper layer. The graphene copper layer is extruded to combine the graphene copper layer and the conductive wire core to form a signal wire.

In the manufacturing method of the signal wire, the conductive wire core is made of copper, aluminum or graphene copper. The thickness of the graphene copper layer is less than 0.1mm. The signal wire has a cross-sectional diameter, wherein the graphene copper layer has a thickness less than 10% of the cross-sectional diameter. The graphene copper material comprises a copper body and a plurality of graphene sheets embedded into the copper body, wherein the graphene copper material is pressed to enable the copper body to form a foil shape and enable the graphene sheets to expand to form a graphene layer embedded into the copper body and extending along the expansion of the graphene copper layer.

The invention can improve the overall conductivity of the signal wire by coating the pressed graphene copper layer on the outer surface of the conductive wire core. The surface layer and the inner core of the signal wire have different electric conductivities, and the electric conductivity of the graphene copper layer on the surface layer is far greater than that of the conductive wire core, so that the transmission impedance of high-frequency signals can be effectively reduced.

Drawings

Fig. 1 is a schematic perspective view of a signal line according to the present invention.

Fig. 2 is a sectional view of fig. 1.

Fig. 3 is a schematic diagram of a structure of a graphene sheet.

Fig. 4 is a schematic diagram of another structure of a graphene sheet.

FIG. 5 is a flowchart illustrating a method of fabricating a signal trace according to the present invention.

FIG. 6 is a schematic diagram illustrating a pressing step of the method for fabricating a signal trace according to the present invention.

FIG. 7 is a schematic view of a graphene copper layer in the method for manufacturing a signal trace according to the present invention.

FIG. 8 is a schematic view of another embodiment of a graphene copper layer in the method for fabricating a signal trace according to the present invention.

FIG. 9 is a schematic diagram illustrating the coating and extrusion steps in the method for fabricating a signal trace according to the present invention.

Fig. 10 is a schematic diagram of the graphene copper layer wrapping the graphene copper conductive core.

Symbolic illustration in the drawings:

10 signal wires; 11, the diameter of the cross section; 100, a conductive wire core; graphene sheets 120; 200, graphene copper layer; 200a, a graphene copper material; 201, thickness; 210, a copper body; 220: graphene sheets; 221 is a carbon atom; 222, functional group.

Detailed Description

Referring to fig. 1 to 3, the present invention provides a signal wire 10, which includes a conductive core 100 and a graphene copper layer 200, wherein the graphene copper layer 200 covers the conductive core 100.

In the embodiment, the conductive wire core 100 is a metal wire made of a metal with better electrical property, such as copper, aluminum, or graphene copper. However, the invention is not limited thereto.

As shown in fig. 2, the graphene copper layer 200 is in the form of a foil, and includes a copper body 210 and a graphene layer 220a embedded in the copper body 210. Specifically, the graphene layer 220a includes several graphene sheets 220. As shown in fig. 3, each graphene sheet 220 at least comprises a plurality of carbon atoms 221, six carbon atoms 221 are arranged in a ring to form a hexagonal graphene structure, and the carbon atoms 221 are arranged in a plurality of graphene structures extending along a plurality of connected planes. As shown in fig. 4, any one of the carbon atoms 221 in each graphene structure may be attached to a functional group 222. The graphene sheets 220 are arranged and extend in a plane, and the graphene layer 220a extends along the plane of the graphene copper layer 200. Specifically, the signal line 10 has a cross-sectional diameter 11, the thickness 201 of the graphene copper layer 200 is less than 0.1mm, preferably less than 0.05mm, and the thickness 201 of the graphene copper layer 200 is less than 10% of the cross-sectional diameter 11.

Referring to fig. 5 to 10, the present invention provides a method for manufacturing a signal line 10, which includes the following steps.

a) First, a conductive core 100 is provided. The conductive core 100 may be made of a metal having a better electrical property, such as copper, aluminum, or graphene copper.

b) As shown in fig. 6, a graphene copper material 200a is pressed into a graphene copper layer 200 in a pressing step. In the present embodiment, the graphene copper material 200a includes a copper body 210 and a plurality of graphene sheets 220 embedded in the copper body 210. Specifically, the graphene copper material 200a is prepared by mixing graphene powder and copper powder; or adding graphene powder into molten copper. Pressing the graphene copper material 200a forms the copper body 210 into a foil shape and expands the graphene sheet 220 embedded in the copper body 210 to form the graphene layer 220a embedded in the copper body 210, and the graphene layer 220a is expanded and extended along the planar direction of the graphene copper layer 200. In the foregoing pressing step, the solid graphene copper material 200a may be pressed at normal temperature to be deformed, or the graphene copper material may be heated to a semi-molten state and then pressed. Depending on the pressing jig or the mold, the graphene copper layer 200 may be pressed to be planar as shown in fig. 7, or may be pressed to be tubular as shown in fig. 8.

c) As shown in fig. 9, in the coating step, the graphene copper layer 200 is coated on the conductive wire core 100, which may coat the planar graphene copper layer 200 on the conductive wire core 100, or may penetrate the conductive wire core 100 into the tubular graphene copper layer 200. Generally, the cross-sectional diameter 11 of the finished product produced by this step is less than about 1cm, the thickness of the graphene copper layer 200 is less than about 0.1cm, and the thickness 201 of the graphene copper layer 200 is less than 10% of the cross-sectional diameter 11.

d) The graphene copper layer 200 is pressed from the outside to the inside in an extrusion step, so that the graphene copper layer 200 is bonded to the outer surface of the conductive core 100 under pressure. The signal wire can be thinned to the required wire diameter in the extrusion step. For example, for general electrical connector applications, the thickness 201 of the graphene copper layer 200 is less than 0.1mm and preferably less than 0.05mm, and the thickness 201 of the graphene copper layer 200 is less than 10% of the cross-sectional diameter 11.

The signal conductor 10 can be manufactured by pressing, cladding, and extruding the conductive core 100 and the graphene material.

Graphene has better conductive properties when stretched in a layered manner, and the conductive properties of graphene are inversely related to the thickness 201 of the layered structure. The graphene coating layer manufactured in a spraying mode cannot spread and arrange graphene sheets. The invention can improve the overall conductivity of the signal wire 10 by coating the pressed graphene copper layer 200 on the outer surface of the conductive wire core 100. The conductivity of the graphene copper layer 200 coated by the copper conductive wire core 100 can be higher than that of the uncoated silver conductive wire core 100, and the price of the graphene copper material 200a is relatively lower than that of the silver material. Furthermore, due to skin effect (skin depth), the high frequency signal is concentrated on the surface of the signal wire 10 when transmitted in the signal wire 10, and the higher the frequency, the shallower the depth of the signal transmitted on the surface of the signal wire 10. The surface layer and the inner core of the signal wire 10 of the present invention have different electrical conductivities, and the electrical conductivity of the graphene copper layer 200 on the surface layer is much greater than that of the conductive wire core 100 made of aluminum, copper or graphene copper, so that the transmission impedance of high frequency signals can be effectively reduced.

It should be noted that, the conductive core 100 made of graphene copper has graphene uniformly distributed therein. As shown in fig. 10, the graphene copper layer 200 is pressed and extruded, and the graphene sheets 220 are arranged in a layered manner, unlike the graphene sheets 120 of the conductive core 100 made of graphene copper. Therefore, the graphene copper layer 200 and the conductive core 100 made of graphene copper coated with the same have different shapes and graphene arrangement forms, and thus have different conductivities.

The present invention does not limit the sequence of the pressing, coating and extruding steps, and the conductive wire core 100 and the graphene copper material 200a may be placed into a tubular mold for extrusion molding to complete the pressing, coating and extruding simultaneously.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, but rather as an equivalent to the spirit of the present invention.

Claims

1. A signal wire, comprising:

a conductive core; and

and the graphene copper layer is in a foil shape and wraps the conductive wire core.

2. The signal conductor as claimed in claim 1, wherein the conductive core is made of copper, aluminum or graphene copper.

3. The signal conductor as claimed in claim 1, wherein the graphene layer includes a copper body and a graphene layer embedded in the copper body, and the graphene layer extends along the extension of the graphene layer.

4. The signal conductor as claimed in claim 1, wherein the graphene copper layer has a thickness of less than 0.1mm.

5. The signal conductor as in claim 1, wherein the signal conductor has a cross-sectional diameter, and wherein the graphene copper layer has a thickness less than 10% of the cross-sectional diameter.

6. A method for manufacturing a signal wire, comprising the steps of:

a) Providing a conductive wire core;

b) Pressing a graphene copper material into a graphene copper layer;

c) Coating the conductive wire core with the graphene copper layer; and

d) The graphene copper layer is extruded to combine the graphene copper layer with the conductive wire core to form a signal wire.

7. The method as claimed in claim 6, wherein the conductive core is made of copper, aluminum or graphene copper.

8. The method as claimed in claim 6, wherein the graphene copper layer is less than 0.1mm thick.

9. The method as claimed in claim 6, wherein the signal trace has a cross-sectional diameter, and the graphene copper layer has a thickness less than 10% of the cross-sectional diameter.

10. The method of claim 6, wherein the graphene copper material comprises a copper body and a plurality of graphene sheets embedded in the copper body, and wherein pressing the graphene copper material forms the copper body into a foil shape and expands the graphene sheets to form a graphene layer embedded in the copper body and extending along the graphene copper layer.