Composite element and mobile device

Abstract

This disclosure provides a composite element comprising a composite structure. The composite structure includes a substrate and a composite layer disposed on a surface of the substrate, and the composite layer includes an alloy layer. The alloy layer includes at least three metals, wherein the at least three metals include zirconium, copper, and aluminum. By including the composite structure in the composite element and disposing of the composite layer comprising the alloy layer on the surface of the substrate of the composite structure, the composite structure acquires desired properties.

Description

Technical Field

[0001] This disclosure relates to a composite element and a mobile device, and more particularly to a composite element having excellent overall durability and a mobile device comprising said composite element. Prior Technology

[0002] Mobile devices are prone to scratches due to frequent carrying, resulting in noticeable damage to their surface. To avoid this damage, users often install protective cases, but these cases are usually bulky and lack sufficient rigidity.

[0003] Therefore, in order to meet users' needs for protection of mobile devices, it is necessary to actively develop structures that are both lightweight and highly rigid. Summary of the Invention

[0004] This disclosure provides a composite element and a mobile device. By providing a composite layer containing an alloy layer on the surface of the substrate of the composite element, the composite structure obtains ideal properties. By designing a specific thickness ratio between the alloy layer and the substrate, the composite structure obtains a composite layer with excellent hardness, which helps to improve the overall durability of the composite structure.

[0005] This disclosure provides a composite element comprising a composite structure. The composite structure includes a substrate and a composite layer, with the composite layer disposed on the surface of the substrate. The substrate is made of an aluminum alloy, and the composite layer includes an alloy layer. The alloy layer includes at least three metals, said at least three metals including zirconium, copper, and aluminum. The composite element has a transition region, the total length of the composite layer in the transition region is LCc, the length of the transition region is Lc, the thickness of the alloy layer is Ta, and the thickness of the substrate is Ts, which satisfy the following conditions: 0.75 ≤ LCc / Lc; and 0.50 ≤ Ta / Ts ≤ 1.00.

[0006] According to this disclosure, another mobile device is provided, comprising the composite element as described above, wherein the mobile device is a mobile phone or a tablet computer.

[0007] According to this disclosure, a composite element is also provided, comprising a composite structure. The composite structure includes a substrate and a composite layer, with the composite layer disposed on a surface of the substrate. The composite layer includes an alloy layer. The alloy layer includes at least three metals, said at least three metals including zirconium, copper, and aluminum. The area of ​​the composite layer in the composite element is Ac, the area of ​​the substrate in the composite element is As, the thickness of the alloy layer is Ta, and the thickness of the substrate is Ts, which satisfy the following conditions: 0.200 ≤ Ac / As; and 0.20 ≤ Ta / Ts ≤ 2.00.

[0008] According to this disclosure, a mobile device is provided, comprising the composite element as described above. Simple Explanation of the Diagram

[0009] To make the above and other objects, features, advantages and embodiments of this disclosure more apparent and understandable, the accompanying drawings are described below: Figure 1 is a front view of the mobile device according to the first embodiment of the present disclosure; Figure 2 is a schematic diagram showing the composite elements of the moving device in Figure 1 as viewed from the short side region; Figure 3 is a schematic diagram of the back of the device shown in Figure 1; Figure 4 is a front view of the mobile device according to the 13th embodiment of this disclosure; Figure 5 is a front view of the mobile device according to the 14th embodiment of this disclosure; Figure 6 is a side view of the moving device shown in Figure 5; and Figure 7 is a schematic diagram of a portion of the composite element of the 15th embodiment of this disclosure. Implementation

[0010] This disclosure provides a composite element and a mobile device. The composite element includes a composite structure, and a composite layer including an alloy layer is disposed on the surface of the substrate of the composite structure, so that the composite structure obtains ideal properties. By designing a specific thickness ratio of the alloy layer to the substrate, it is ensured that the composite structure obtains a composite layer with excellent hardness, which helps to improve the overall durability of the composite structure.

[0011] One embodiment of this disclosure provides a composite element comprising a composite structure. The composite structure includes a substrate and a composite layer, with the composite layer disposed on a surface of the substrate. The substrate is made of an aluminum alloy, and the composite layer includes an alloy layer. The alloy layer includes at least three metals, wherein the at least three metals include zirconium, copper, and aluminum. The composite element has a transition region, the total length of the composite layer in the transition region is LCc, the length of the transition region is Lc, the thickness of the alloy layer is Ta, and the thickness of the substrate is Ts, which satisfy the following conditions: 0.75 ≤ LCc / Lc; and 0.50 ≤ Ta / Ts ≤ 1.00. Thus, by providing a composite layer including an alloy layer on the surface of the substrate, the composite structure achieves ideal properties. Furthermore, by designing the proportion of the composite layer in the transition region, the scratch resistance of the easily impacted areas of the mobile device can be effectively improved, and the installation efficiency of the composite structure in the mobile device can be significantly enhanced. Furthermore, by designing a specific thickness ratio between the alloy layer and the substrate, it is possible to ensure that the composite structure obtains a composite layer with excellent hardness, which helps to improve the overall durability of the composite structure.

[0012] Another embodiment of this disclosure provides a composite element comprising a composite structure. The composite structure includes a substrate and a composite layer, with the composite layer disposed on a surface of the substrate. The composite layer includes an alloy layer. The alloy layer includes at least three metals, wherein the at least three metals include zirconium, copper, and aluminum. The area of ​​the composite layer in the composite element is Ac, the area of ​​the substrate in the composite element is As, the thickness of the alloy layer is Ta, and the thickness of the substrate is Ts, satisfying the following conditions: 0.200 ≤ Ac / As; and 0.20 ≤ Ta / Ts ≤ 2.00. Thus, by providing a composite layer including an alloy layer on the surface of the substrate, the composite structure obtains ideal properties. Furthermore, by designing an optimal composite layer area ratio, the composite layer achieves optimal scratch resistance with a smaller placement area, contributing to improved placement efficiency of the composite layer over the overall area. Furthermore, by designing a specific thickness ratio between the alloy layer and the substrate, it is ensured that the composite structure obtains a composite layer with excellent hardness, contributing to improved overall durability of the composite structure.

[0013] According to the composite element disclosed herein, the thickness of the alloy layer is Ta, and the thickness of the substrate is Ts, which can satisfy the following condition: 0.30 ≤ Ta / Ts ≤ 1.50. By designing a specific thickness ratio of the alloy layer to the substrate, the composite structure can be ensured to achieve excellent hardness of the composite layer, which helps to improve the overall durability of the composite structure. Alternatively, it can satisfy the following condition: 0.60 ≤ Ta / Ts ≤ 0.90. Alternatively, it can satisfy the following condition: 0.75 ≤ Ta / Ts ≤ 0.85.

[0014] According to the composite element disclosed herein, the total length of the composite layer in the transition region is LCc, and the length of the transition region is Lc, which satisfies the following condition: 0.80 ≤ LCc / Lc. By designing the proportion of the composite layer in the transition region, the scratch resistance of the easily impacted areas of the mobile device can be effectively improved, and the installation efficiency of the composite structure in the mobile device can be significantly improved. Alternatively, it can satisfy the following condition: 0.85 ≤ LCc / Lc. Alternatively, it can satisfy the following condition: 0.90 ≤ LCc / Lc ≤ 1.00.

[0015] According to the composite element disclosed herein, the area of ​​the composite layer in the composite element is Ac, and the area of ​​the substrate in the composite element is As, which can satisfy the following condition: 0.350 ≤ Ac / As ≤ 0.450. By designing the optimal area ratio of the composite layer, the composite layer achieves the best scratch resistance with a smaller installation area, which helps to improve the installation efficiency of the composite layer in the overall area. Alternatively, it can satisfy the following condition: 0.005 ≤ Ac / As ≤ 0.060. Alternatively, it can satisfy the following condition: 0.015 ≤ Ac / As ≤ 0.020. Alternatively, it can satisfy the following condition: 0.600 ≤ Ac / As. Alternatively, it can satisfy the following condition: 0.380 ≤ Ac / As ≤ 0.420.

[0016] According to the composite element disclosed herein, the weight percentage of zirconium in the alloy layer is Pzr, which can satisfy the following condition: 60% ≤ Pzr ≤ 90%. By designing a specific ratio of zirconium in the alloy layer, a composite layer with both hardness and ductility is produced, avoiding the composite layer from being too brittle and easily peeling off. Alternatively, it can satisfy the following condition: 50% ≤ Pzr. Alternatively, it can satisfy the following condition: 55% ≤ Pzr < 100%. Alternatively, it can satisfy the following condition: 62% ≤ Pzr ≤ 80%. Alternatively, it can satisfy the following condition: 68% ≤ Pzr ≤ 75%.

[0017] According to the composite element disclosed herein, the weight percentage of copper in the alloy layer is Pcu, which can satisfy the following condition: 5% ≤ Pcu ≤ 23%. By designing a specific proportion of copper in the alloy layer, a composite layer with both hardness and ductility is produced, avoiding the composite layer from being too brittle and easily peeling off. Alternatively, it can satisfy the following condition: Pcu ≤ 30%. Alternatively, it can satisfy the following condition: 0% < Pcu ≤ 25%. Alternatively, it can satisfy the following condition: 10% ≤ Pcu ≤ 21%. Alternatively, it can satisfy the following condition: 12% ≤ Pcu ≤ 20%. Alternatively, it can satisfy the following condition: 15% ≤ Pcu ≤ 18%.

[0018] According to the composite element disclosed herein, the weight percentage of the aluminum-to-alloy layer is Pal, which satisfies the following condition: 2% ≤ Pal ≤ 6%. By designing a specific proportion of the aluminum-to-alloy layer, a composite layer with both hardness and ductility is produced, avoiding the composite layer from being too brittle and easily peeling off. Alternatively, it can satisfy the following condition: Pal ≤ 10%. Alternatively, it can satisfy the following condition: 0% < Pal ≤ 8%. Alternatively, it can satisfy the following condition: 3% ≤ Pal ≤ 5%.

[0019] According to the composite element disclosed herein, where the weight percentage of zirconium in the alloy layer is Pzr, the weight percentage of copper in the alloy layer is Pcu, and the weight percentage of aluminum in the alloy layer is Pal, it can satisfy the following condition: 95% ≤ Pzr + Pcu + Pal. By satisfying the total percentage of zirconium, copper, and aluminum in the alloy layer, the properties of zirconium, copper, and aluminum are ensured to dominate, which helps the alloy layer maintain appropriate hardness and thermal conductivity. Alternatively, it can satisfy the following condition: 75% ≤ Pzr + Pcu + Pal. Alternatively, it can satisfy the following condition: 80% ≤ Pzr + Pcu + Pal. Alternatively, it can satisfy the following condition: 83% ≤ Pzr + Pcu + Pal. Alternatively, it can satisfy the following condition: 87% ≤ Pzr + Pcu + Pal. Alternatively, it can satisfy the following condition: 90% ≤ Pzr + Pcu + Pal. Alternatively, it can satisfy the following condition: 93% ≤ Pzr + Pcu + Pal ≤ 100%. Alternatively, it can satisfy the following condition: 95% ≤ Pzr + Pcu + Pal ≤ 98%.

[0020] According to the composite element disclosed herein, the density of the alloy layer is Da, and the density of the substrate is Ds, which can satisfy the following condition: 1.5 ≤ Da / Ds ≤ 3.5. By designing a specific density ratio between the alloy layer and the substrate, the weight uniformity on both sides of the composite structure is ensured, which helps to improve the grip. Alternatively, it can satisfy the following condition: Da / Ds ≤ 5.0. Alternatively, it can satisfy the following condition: Da / Ds ≤ 4.0. Alternatively, it can satisfy the following condition: 2.0 ≤ Da / Ds ≤ 3.0. Alternatively, it can satisfy the following condition: 2.4 ≤ Da / Ds ≤ 2.5.

[0021] According to the composite element disclosed herein, the thermal conductivity of the alloy layer is TCa, and the thermal conductivity of the substrate is TCs, which can satisfy the following condition: 30 ≤ TCs / TCa. By designing the ratio of the thermal conductivity of the substrate to the alloy layer, the substrate is ensured to have better thermal conductivity than the composite layer, thus avoiding thermal barrier effect of the composite layer on the composite structure. Alternatively, it can satisfy the following condition: 5 ≤ TCs / TCa. Alternatively, it can satisfy the following condition: 10 ≤ TCs / TCa. Alternatively, it can satisfy the following condition: 60 ≤ TCs / TCa. Alternatively, it can satisfy the following condition: 70 ≤ TCs / TCa ≤ ∞. Alternatively, it can satisfy the following condition: 75 ≤ TCs / TCa ≤ 90.

[0022] According to the composite element disclosed herein, the thermal conductivity of the substrate is TCs, which satisfies the following condition: 5 W / mK ≤ TCs. By setting the substrate with a specific thermal conductivity, the composite structure exhibits excellent thermal conductivity. Alternatively, it can satisfy the following condition: 20 W / mK ≤ TCs. Alternatively, it can satisfy the following condition: 50 W / mK ≤ TCs. Alternatively, it can satisfy the following condition: 80 W / mK ≤ TCs. Alternatively, it can satisfy the following condition: 100 W / mK ≤ TCs. Alternatively, it can satisfy the following condition: 130 W / mK ≤ TCs ≤ ∞. Alternatively, it can satisfy the following condition: 180 W / mK ≤ TCs ≤ 300 W / mK.

[0023] According to the composite element disclosed herein, the thermal conductivity of the alloy layer is TCa, which satisfies the following condition: 0.5 W / mK ≤ TCa. By limiting the thermal conductivity of the alloy layer, a basic thermal conductivity is ensured, which helps to reduce heat buildup in the composite structure. Alternatively, it can satisfy the following condition: 1.0 W / mK ≤ TCa. Alternatively, it can satisfy the following condition: 1.5 W / mK ≤ TCa. Alternatively, it can satisfy the following condition: 2.0 W / mK ≤ TCa ≤ ∞.

[0024] According to the composite element disclosed herein, the alloy layer has a hardness of Ha, which satisfies the following conditions: 400 HV ≤ Ha ≤ 1000 HV. By setting an alloy layer with a specific hardness, excellent scratch resistance can be provided to the composite structure. Alternatively, it can satisfy the following conditions: 300 HV ≤ Ha. Alternatively, it can satisfy the following conditions: 350 HV ≤ Ha. Alternatively, it can satisfy the following conditions: 450 HV ≤ Ha ≤ 600 HV. Alternatively, it can satisfy the following conditions: 500 HV ≤ Ha ≤ 550 HV.

[0025] According to the composite element disclosed herein, the hardness of the substrate is Hs, which can satisfy the following condition: Hs ≤ 250 HV. By using a substrate with lower hardness, the substrate is easier to manufacture and process, which helps to reduce the difficulty of composite structure production. Alternatively, it can satisfy the following condition: Hs ≤ 200 HV. Alternatively, it can satisfy the following condition: 0 HV < Hs ≤ 180 HV. Alternatively, it can satisfy the following condition: 50 HV ≤ Hs ≤ 150 HV. Alternatively, it can satisfy the following condition: 80 HV ≤ Hs ≤ 100 HV.

[0026] According to the composite element disclosed herein, the alloy layer has a hardness of Ha, and the substrate has a hardness of Hs, which satisfies the following condition: 5.00 ≤ Ha / Hs ≤ 10.00. By designing the hardness ratio of the alloy layer to the substrate, the composite layer has better scratch resistance than the substrate, which helps to improve the installation efficiency of the composite layer. Alternatively, it can satisfy the following condition: 6.00 ≤ Ha / Hs ≤ 8.00. Alternatively, it can satisfy the following condition: 1.50 ≤ Ha / Hs. Alternatively, it can satisfy the following condition: 2.00 ≤ Ha / Hs. Alternatively, it can satisfy the following condition: 2.50 ≤ Ha / Hs. Alternatively, it can satisfy the following condition: 3.00 ≤ Ha / Hs. Alternatively, it can satisfy the following condition: 7.00 ≤ Ha / Hs ≤ 7.50.

[0027] According to the composite element disclosed herein, the thickness of the alloy layer is Ta, which can satisfy the following condition: 0.5 mm ≤ Ta ≤ 1.5 mm. By designing a specific alloy layer thickness, the physical properties of the composite structure can be improved with a smaller alloy layer thickness, which helps to save material costs. Alternatively, it can satisfy the following condition: 0.30 mm ≤ Ta. Alternatively, it can satisfy the following condition: 0.10 mm ≤ Ta. Alternatively, it can satisfy the following condition: Ta ≤ 1.00 mm. Alternatively, it can satisfy the following condition: 0 mm < Ta ≤ 1.00 mm. Alternatively, it can satisfy the following condition: 0.40 mm ≤ Ta. Alternatively, it can satisfy the following condition: 0.60 mm ≤ Ta ≤ 1.20 mm. Alternatively, it can satisfy the following condition: 0.70 mm ≤ Ta ≤ 0.80 mm.

[0028] According to the composite element disclosed herein, the composite structure may further include a buffer layer located between the composite layer and the substrate. By providing a buffer layer between the composite layer and the substrate, direct damage to the substrate with lower hardness is prevented when the composite structure is subjected to impact, thus helping to improve the durability of the substrate.

[0029] According to the composite element disclosed herein, the composite element may be a mid-frame, and the composite element has a long side area and a short side area. By setting the composite element as a mid-frame, the scratch resistance of the mobile device's edges can be effectively improved.

[0030] According to the composite element disclosed herein, the total length of the composite layer in the long side region is LLC, and the length of the long side region is Ll, ​​which can satisfy the following condition: 0 < LLC / Ll ≤ 0.15. By designing the proportion of the composite layer in the long side region, the composite layer achieves excellent scratch resistance with a shorter installation length, which helps to improve the installation efficiency of the composite layer in the long side region. Alternatively, it can satisfy the following condition: LLC / Ll ≤ 0.25. Alternatively, it can satisfy the following condition: LLC / Ll ≤ 0.20. Alternatively, it can satisfy the following condition: 0.05 ≤ LLC / Ll ≤ 0.10.

[0031] According to the composite element disclosed herein, the total length of the composite layer in the short side region is LSc, and the length of the short side region is Ls, which can satisfy the following condition: 0.05 ≤ LSc / Ls ≤ 0.15. By designing the proportion of the composite layer in the short side region, the composite layer achieves excellent scratch resistance with a shorter installation length, which helps to improve the installation efficiency of the composite layer in the short side region. Alternatively, it can satisfy the following condition: LSc / Ls ≤ 0.30. Alternatively, it can satisfy the following condition: LSc / Ls ≤ 0.25. Alternatively, it can satisfy the following condition: 0 < LSc / Ls ≤ 0.20. Alternatively, it can satisfy the following condition: 0.10 ≤ LSc / Ls ≤ 0.13.

[0032] According to the composite component disclosed herein, the substrate material can be an aluminum alloy, a titanium alloy, or a stainless steel. By setting the substrate material to aluminum alloy, titanium alloy, or stainless steel, the substrate possesses basic hardness and excellent thermal conductivity.

[0033] According to the composite element disclosed herein, the composite element may be a back panel or a front bezel. By setting the composite element as the back panel or front bezel of the mobile device, the scratch resistance of the mobile device in the user contact area can be effectively improved.

[0034] According to the composite element disclosed herein, the alloy layer may be an amorphous alloy. Unlike crystalline structures, amorphous structures are not brittle, and by using an amorphous alloy for the alloy layer, it is helpful to prevent the alloy layer from shattering due to impact.

[0035] The composite element described in this disclosure can be a frame, back panel, outer shell, top cover, bottom cover, button, key, gear, turntable, or pivot. The frame can be further configured as a middle frame or front frame, etc. The composite element can have a transition area and a side area. The transition area is the curved area when the composite element is laid flat, as viewed from above. The curvature radius of the horizontal cross-section of the composite element when it is laid flat is used as the criterion. The side area is the area located between the two transition areas when the composite element is laid flat, with both the beginning and end being straight lines and the overall straight section exceeding 50%. The broken line can be regarded as multiple straight lines. The side area is divided into a long side area and a short side area according to the position of its side length. The side area located on the long side of the composite element is the long side area, and the side area located on the short side of the composite element is the short side area. When the four sides of the composite element are of equal length, there is no distinction between long and short sides, and the side area can be either a long side area or a short side area. When the composite element is rectangular, the transition area is the intersection point of the two sides of the composite element.

[0036] The mid-frame described in this disclosure refers to the component used to connect the screen and the back panel (the side opposite the screen) of a mobile device.

[0037] The composite structure described herein may include a composite layer and a substrate. The composite layer may be directly or indirectly disposed on the surface of the substrate. When the composite layer is indirectly disposed on the surface of the substrate, a buffer layer may be present between the composite layer and the substrate. The buffer layer may be made of a gas or a liquid. For example, the gas may be air, nitrogen, helium, neon, argon, krypton, or xenon, and the liquid may be water, oil, heat dissipation fluid, or adhesive. When the substrate is plastic or glass, it is not easy to dispose of the composite layer on the substrate surface. Therefore, an adhesive may be provided between the substrate and the composite layer, so that the composite layer is indirectly disposed on the surface of the substrate, thereby improving the tightness between the substrate and the composite layer.

[0038] The substrate described in this disclosure can be a semiconductor, metal, metal compound, alloy, glass, plastic, or carbon fiber, etc. The semiconductor material can be silicon, germanium, gallium arsenide, indium phosphide, gallium nitride, zinc oxide, aluminum nitride, or silicon carbide. The metal can be gold, silver, copper, iron, aluminum, tin, nickel, lead, zinc, titanium, or vanadium; the metal compound can be a metal oxide or a metal nitride. Specifically: the metal oxide can be aluminum oxide, and the metal nitride can be lithium nitride, magnesium nitride, aluminum nitride, titanium nitride, or tantalum nitride. The alloy can be an aluminum alloy, titanium alloy, or iron alloy, with the iron alloy specifically including stainless steel.

[0039] The composite layer described in this disclosure may include at least one film layer, at least two film layers, or at least three film layers. The at least one film layer, at least two film layers, or at least three film layers may include an intermediate layer, an alloy layer, and an outer layer.

[0040] The intermediate layer described in this disclosure can be used to enhance the connection strength between the substrate and the alloy layer. The intermediate layer can be disposed between the substrate and the alloy layer, and can be composed of metal oxides or non-metal oxides, such as: aluminum oxide, silicon dioxide, titanium dioxide, zirconium dioxide, magnesium oxide, calcium oxide, lithium oxide, sodium oxide, potassium oxide, copper oxide, zinc oxide, etc.

[0041] The alloy layer described in this disclosure may comprise at least three metals, at least four metals, or at least pentametals. In detail: The alloy layer may contain bismuth, copper, aluminum, uranium, nickel, titanium, uranium, magnesium, calcium, chromium, uranium, titanium, chromium, chromium, chromium, chromium, chromium, manganese, iron, cobalt, uranium, platinum, silver, gold, gallium, chromium, chromium, tin, chromium, and chromium. The weight percentage of bismuth in the alloy layer may be 58%, 65%, 66%, 67%, 68%, 70%, 75%, or 76%, the weight percentage of copper in the alloy layer may be 10%, 14%, 18%, 20%, 22%, or 28%, and the weight percentage of aluminum in the alloy layer may be 2%, 3%, 5%, 5%, 5.5%, 5.4%. The aforementioned alloy layer may be an amorphous alloy, an alloy refers to a mixture of at least two elements and one of which is a metal, an amorphous alloy refers to an amorphous structure alloy in a disordered state.

[0042] The outer surface layer described in this disclosure may be used to protect the alloy layer. The outer layer may be disposed on the air-dependent side of the alloy layer, which may be a metal plating or anodized layer. The metal plating can be gold plating, nickel plating, chrome plating or tin plating;

[0043] The hardness described in this disclosure refers to the Vickers hardness, hardness measurement uses a regular tetragonal conical diamond indenter with an angle of 136° in the opposite face, and the unit of hardness is the Vickers hardness value (HV value).

[0044] The thickness of the substrate and alloy layer described in this disclosure is taken at any three points on the composite structure of the same surface to make a vertical normal. The vertical normal needs to pass through the substrate and alloy layer at the same time.

[0045] The total length of the composite layer at the turning zone described in this revealing content refers to the maximum sum length of the composite layer that can be obtained on each horizontal section of the composite layer over the turning zone of the flat-lying composite element.

[0046] The total length of the composite layer in the long-edge region described in this elucidation refers to the maximum sum length of the composite layer that can be obtained on each horizontal section of the composite layer over the long-edge region of the flat-lying composite element.

[0047] The total length of the composite layer in the short side region as described in this disclosure refers to the maximum sum of the composite layer lengths that can be obtained from each horizontal cross-section on the short side region of the flat composite element. Taking Figure 2 as an example, the composite structure 110 has the sum of multiple composite layers 112 in the short side region 103, but the horizontal cross-section P is used as the criterion. The maximum value is selected from the sum of the composite layer 112 lengths corresponding to the two horizontal cross-sections P in Figure 2 as the total length of the composite layer 112 in the short side region 103.

[0048] The horizontal cross-section mentioned in this disclosure refers to a virtual surface that is parallel to the horizontal plane and intersects with the composite element.

[0049] The area of ​​the composite layer on the composite element as described in this disclosure refers to the projected area of ​​the composite layer on a single surface of the composite element.

[0050] The area of ​​the substrate on the composite element as described in this disclosure refers to the single surface of the composite element, which is the projected area of ​​the substrate on that surface.

[0051] The projected area mentioned in this disclosure refers to the area of ​​a surface projected onto a horizontal plane. The projected area can be used to standardize the calculation of the three-dimensional area of ​​each surface.

[0052] Unless otherwise specified, the measurements in this disclosure were taken at a room temperature of 25°C and a humidity of 50%.

[0053] The technical features of the composite elements disclosed above can be combined and configured to achieve the corresponding effects.

[0054] Another embodiment of this disclosure provides a mobile device comprising the composite element described above, wherein the mobile device is a mobile phone or a tablet computer.

[0055] Another embodiment of this disclosure provides a mobile device comprising the composite elements described above.

[0056] The mobile devices described in this disclosure may include cameras, video cameras, video lenses, mobile phones, tablets, laptops, handheld game consoles, watches, wristbands, AR glasses, VR glasses, AR headsets, VR headsets, etc.

[0057] [First Embodiment]

[0058] Please refer to Figures 1 through 3. Figure 1 is a front view of the mobile device 10 according to the first embodiment of this disclosure. Figure 2 is a view of the mobile device 10 as seen from the short side region 103. Figure 3 is a rear view of the mobile device 10 according to the first embodiment. The mobile device 10 of the first embodiment may be a mobile phone, and the mobile device 10 includes a composite element 11, a composite element 12, and a screen 13.

[0059] In the first embodiment, composite element 11 is the mid-frame of the mobile phone, composite element 12 is the back panel of the mobile phone, and composite element 11 is connected between screen 13 and composite element 12.

[0060] As shown in Figure 1, the composite element 11 has a transition region 101, a long side region 102, and a short side region 103, and the composite element 11 includes a composite structure 110. The composite structure 110 includes a substrate 111 and a composite layer 112, and the composite layer 112 is disposed on the surface of the substrate 111. The composite layer 112 includes an alloy layer 113, an outer surface layer 114, and an intermediate layer 115. The alloy layer 113 is located between the outer surface layer 114 and the intermediate layer 115. The outer surface layer 114 is disposed on the side of the alloy layer 113 closer to air A, and the intermediate layer 115 is disposed between the alloy layer 113 and the substrate 111.

[0061] Please refer to Table 1A, which presents the composition and proportions of the alloy layer 113 in the first embodiment. In the first embodiment, the alloy layer 113 is an amorphous alloy, and the alloy layer 113 contains at least three metals, including zirconium, copper, aluminum and niobium. Table 1A Structure of alloy layer Amorphous alloy Element zirconium copper aluminum niobium Pzr (%) 70 Pcu (%) twenty four Pal (%) 4 Niobium in the alloy layer (weight percentage) 2 Pzr+Pcu+Pal (%) 98

[0062] In Table 1A, Pzr is the weight percentage of zirconium alloy layer 113, Pcu is the weight percentage of copper alloy layer 113, and Pal is the weight percentage of aluminum alloy layer 113. In the first embodiment, the total weight percentage of zirconium, copper, and aluminum alloy layer 113 is 98%.

[0063] Please refer to Table 1B, which presents the parameter details of the composite element 11 of the first embodiment, where Da is the density of the alloy layer 113, Ha is the hardness of the alloy layer 113, TCa is the thermal conductivity of the alloy layer 113, Ta is the thickness of the alloy layer 113, Ds is the density of the substrate 111, Hs is the hardness of the substrate 111, TCs is the thermal conductivity of the substrate 111, Ts is the thickness of the substrate 111, LCc is the total length of the composite layer 112 in the transition region 101, LLc is the total length of the composite layer 112 in the long side region 102, LSc is the total length of the composite layer 112 in the short side region 103, Lc is the length of the transition region 101, Ll is the length of the long side region 102, and Ls is the length of the short side region 103. Table 1B Da (g / cm 3) 6.68 Ts (mm) 2.5 Ha (HV) 480 LCc (mm) 10.00 TCa (W / mK) 2.5 LLC (mm) 20.00 Ta (mm) 0.70 LSc (mm) 35.75 Material of the substrate aluminum alloy Lc (mm) 11.74 Ds (g / cm 3) 2.82 Ll (mm) 134.64 Hs (HV) 68 Ls (mm) 56.54 TCs (W / mK) 125 Parameter calculation Da / Ds 2.37 LCc / Lc 0.85 Ha / Hs 7.06 LLc / Ll 0.15 TCs / TCa 50.00 LSc / Ls 0.63 Ta / Ts 0.28

[0064] In the first embodiment, the substrate 111 is made of aluminum alloy. The total length of the composite layer 112 in the transition region 101 is 10.00 mm, the total length of the composite layer 112 in the long side region 102 is 20.00 mm, the total length of the composite layer 112 in the short side region 103 is 35.75 mm, the length of the transition region 101 is 11.74 mm, the length of the long side region 102 is 134.64 mm, and the length of the short side region 103 is 56.54 mm. Furthermore, since the composite structure 110 has the sum of the lengths of multiple composite layers 112 in the short side region 103, the horizontal cross-section P is used as the criterion, and the maximum value is selected from the sum of the lengths of the composite layers 112 corresponding to the two horizontal cross-sections P as the total length LSc of the composite layer 112 in the short side region 103.

[0065] As shown in Figure 3, the composite element 12 includes a composite structure 120, which includes a substrate (not shown) and a composite layer (not shown). The composite layer is disposed on the surface of the substrate, wherein the substrate is made of glass, and the composite layer includes an alloy layer. Furthermore, the parameter details of the composite layer and alloy layer of the composite structure 120 of the composite element 12 are the same as the parameter details of the composite layer 112 and alloy layer 113 of the composite structure 110 of the composite element 11. For the same details, please refer to the preceding paragraph; they will not be repeated here.

[0066] Please refer to Table 1C, which presents the parameter details of the composite element 12 of the first embodiment, where Ac is the area of ​​the composite layer in the composite element 12 and As is the area of ​​the substrate in the composite element 12. Table 1C Ac (mm 2) 4200.00 Ac / As 0.397 As (mm 2) 10578.02

[0067] Furthermore, the dimensions of the mobile device 10 shown in Figures 1 to 3 are merely examples, and the actual values ​​of each parameter are based on the values ​​listed in Tables 1A to 1C. Moreover, if the definitions of data in the tables of the following embodiments are the same as those in Tables 1A to 1C, they will not be repeated.

[0068] [Second Embodiment]

[0069] The mobile device in the second embodiment can be a mobile phone, and the mobile device includes a first composite element and a second composite element, wherein the first composite element is the mid-frame of the mobile phone, and the second composite element is the back panel of the mobile phone.

[0070] The first composite element has a transition region, a long side region, and a short side region, and the first composite element includes a composite structure. The composite structure includes a substrate and a composite layer, and the composite layer is disposed on the surface of the substrate. The composite layer includes an alloy layer, the alloy layer is an amorphous alloy, wherein the alloy layer includes at least three metals, and the at least three metals include zirconium, copper, aluminum, and niobium.

[0071] Please refer to Table 2A, which shows the composition and proportions of the alloy layer of the first composite element in the second embodiment. Table 2A Structure of alloy layer Amorphous alloy Element zirconium copper aluminum niobium Pzr (%) 70 Pcu (%) twenty four Pal (%) 4 Niobium in the alloy layer (weight percentage) 2 Pzr+Pcu+Pal (%) 98

[0072] In the second embodiment, the total weight percentage of zirconium, copper, and aluminum in the alloy layer of the first composite element is 98%.

[0073] Please refer to Table 2B, which presents the parameter details of the first composite element in the second embodiment. Table 2B Da (g / cm 3) 6.68 Ts (mm) 2.0 Ha (HV) 480 LCc (mm) 11.00 TCa (W / mK) 2.5 LLC (mm) 20.00 Ta (mm) 0.65 LSc (mm) 38.80 Material of the substrate aluminum alloy Lc (mm) 12.80 Ds (g / cm 3) 2.81 Ll (mm) 146.70 Hs (HV) 162 Ls (mm) 61.30 TCs (W / mK) 163 Parameter calculation Da / Ds 2.38 LCc / Lc 0.86 Ha / Hs 2.96 LLc / Ll 0.14 TCs / TCa 65.20 LSc / Ls 0.63 Ta / Ts 0.33

[0074] In the second embodiment, the substrate of the first composite element is made of aluminum alloy, the total length of the composite layer in the transition area is 11.00 mm, the total length of the composite layer in the long side area is 20.00 mm, the total length of the composite layer in the short side area is 38.80 mm, the length of the transition area is 12.80 mm, the length of the long side area is 146.70 mm, and the length of the short side area is 61.30 mm.

[0075] The second composite element includes a composite structure comprising a substrate and a composite layer, wherein the composite layer is disposed on the surface of the substrate, the substrate being made of plastic, and the composite layer comprising an alloy layer. Furthermore, the parameter details of the composite layer and alloy layer of the composite structure of the second composite element in the second embodiment can be the same as those of the composite layer and alloy layer of the composite structure of the first composite element; therefore, please refer to the preceding paragraph for the same details, which will not be repeated here.

[0076] Please refer to Table 2C, which presents the parameter details of the second composite element in the second embodiment. Table 2C Ac (mm 2) 5000.00 Ac / As 0.400 As (mm 2) 12508.26

[0077] [Embodiment 3]

[0078] The mobile device in the third embodiment can be a tablet computer, and the mobile device includes a first composite element and a second composite element, wherein the first composite element is the mid-frame of the tablet computer and the second composite element is the back panel of the tablet computer.

[0079] The first composite element has a transition region, a long side region, and a short side region, and the first composite element includes a composite structure. The composite structure includes a substrate and a composite layer, and the composite layer is disposed on the surface of the substrate. The composite layer includes an alloy layer, the alloy layer is an amorphous alloy, wherein the alloy layer includes at least three metals, and the at least three metals include zirconium, copper, aluminum, and niobium.

[0080] Please refer to Table 3A, which shows the composition and proportions of the alloy layer of the first composite element in the third embodiment. Table 3A Structure of alloy layer Amorphous alloy Element zirconium copper aluminum niobium Pzr (%) 70 Pcu (%) twenty four Pal (%) 4 Niobium in the alloy layer (weight percentage) 2 Pzr+Pcu+Pal (%) 98

[0081] In the third embodiment, the total weight percentage of zirconium, copper, and aluminum in the alloy layer of the first composite element is 98%.

[0082] Please refer to Table 3B, which presents the parameter details of the first composite element of the third embodiment. Table 3B Da (g / cm 3) 6.68 Ts (mm) 1.5 Ha (HV) 480 LCc (mm) 12.00 TCa (W / mK) 2.5 LLC (mm) 15.00 Ta (mm) 1.20 LSc (mm) 8.00 Material of the substrate aluminum alloy Lc (mm) 15.34 Ds (g / cm 3) 2.69 Ll (mm) 175.86 Hs (HV) 83 Ls (mm) 115.26 TCs (W / mK) 200 Parameter calculation Da / Ds 2.48 LCc / Lc 0.78 Ha / Hs 5.78 LLc / Ll 0.09 TCs / TCa 80.00 LSc / Ls 0.07 Ta / Ts 0.80

[0083] In the third embodiment, the substrate of the first composite element is made of aluminum alloy, the total length of the composite layer in the transition area is 12.00 mm, the total length of the composite layer in the long side area is 15.00 mm, the total length of the composite layer in the short side area is 8.00 mm, the length of the transition area is 15.34 mm, the length of the long side area is 175.86 mm, and the length of the short side area is 115.26 mm.

[0084] The second composite element includes a composite structure comprising a substrate and a composite layer, wherein the composite layer is disposed on the surface of the substrate, the substrate being made of aluminum alloy, and the composite layer comprising an alloy layer. Furthermore, the parameter details of the composite layer and alloy layer of the composite structure of the second composite element in the third embodiment can be the same as those of the composite layer and alloy layer of the composite structure of the first composite element; therefore, please refer to the preceding paragraph for the same details, which will not be repeated here.

[0085] Please refer to Table 3C, which presents the parameter details of the second composite element in the third embodiment. Table 3C Ac (mm 2) 10000.00 Ac / As 0.383 As (mm 2) 26137.95

[0086] [Example 4]

[0087] The mobile device in the fourth embodiment can be a tablet computer, and the mobile device includes a first composite element and a second composite element, wherein the first composite element is the mid-frame of the tablet computer and the second composite element is the back panel of the tablet computer.

[0088] The first composite element has a transition region, a long side region, and a short side region, and the first composite element includes a composite structure. The composite structure includes a substrate and a composite layer, and the composite layer is disposed on the surface of the substrate. The composite layer includes an alloy layer, the alloy layer is an amorphous alloy, wherein the alloy layer includes at least three metals, and the at least three metals include zirconium, copper, aluminum, and niobium.

[0089] Please refer to Table 4A, which shows the composition and proportions of the alloy layer of the first composite element in the fourth embodiment. Table 4A Structure of alloy layer Amorphous alloy Element zirconium copper aluminum niobium Pzr (%) 70 Pcu (%) twenty four Pal (%) 4 Niobium in the alloy layer (weight percentage) 2 Pzr+Pcu+Pal (%) 98

[0090] In the fourth embodiment, the total weight percentage of zirconium, copper, and aluminum in the alloy layer of the first composite element is 98%.

[0091] Please refer to Table 4B, which presents the parameter details of the first composite element of the fourth embodiment. Table 4B Da (g / cm 3) 6.68 Ts (mm) 1.0 Ha (HV) 480 LCc (mm) 19.52 TCa (W / mK) 2.5 LLC (mm) 20.00 Ta (mm) 1.00 LSc (mm) 8.00 Material of the substrate Titanium alloy Lc (mm) 19.52 Ds (g / cm 3) 4.51 Ll (mm) 223.74 Hs (HV) 350 Ls (mm) 154.64 TCs (W / mK) 15.24 Parameter calculation Da / Ds 1.48 LCc / Lc 1.00 Ha / Hs 1.37 LLc / Ll 0.09 TCs / TCa 6.10 LSc / Ls 0.05 Ta / Ts 1.00

[0092] In the fourth embodiment, the substrate of the first composite element is made of titanium alloy, the total length of the composite layer in the transition area is 19.52 mm, the total length of the composite layer in the long side area is 20.00 mm, the total length of the composite layer in the short side area is 8.00 mm, the length of the transition area is 19.52 mm, the length of the long side area is 223.74 mm, and the length of the short side area is 154.64 mm.

[0093] The second composite element includes a composite structure comprising a substrate and a composite layer, wherein the composite layer is disposed on the surface of the substrate, the substrate being made of titanium alloy, and the composite layer comprising an alloy layer. Furthermore, the parameter details of the composite layer and alloy layer of the composite structure of the second composite element in the fourth embodiment can be the same as those of the composite layer and alloy layer of the composite structure of the first composite element; therefore, please refer to the preceding paragraph for the same details, which will not be repeated here.

[0094] Please refer to Table 4C, which presents the parameter details of the second composite element in the fourth embodiment. Table 4C Ac (mm 2) 15000.00 Ac / As 0.339 As (mm 2) 44296.78

[0095] [Version 5]

[0096] The mobile device in the fifth embodiment may be a tablet computer, and the mobile device includes a first composite element and a second composite element, wherein the first composite element is the mid-frame of the tablet computer and the second composite element is the back panel of the tablet computer.

[0097] The first composite element has a transition region, a long side region, and a short side region, and the first composite element includes a composite structure. The composite structure includes a substrate and a composite layer, and the composite layer is disposed on the surface of the substrate. The composite layer includes an alloy layer, the alloy layer is an amorphous alloy, wherein the alloy layer includes at least three metals, and the at least three metals include zirconium, copper, aluminum, and niobium.

[0098] Please refer to Table 5A, which shows the composition and proportions of the alloy layer of the first composite element in the fifth embodiment. Table 5A Structure of alloy layer Amorphous alloy Element zirconium copper aluminum niobium Pzr (%) 70 Pcu (%) twenty four Pal (%) 4 Niobium in the alloy layer (weight percentage) 2 Pzr+Pcu+Pal (%) 98

[0099] In the fifth embodiment, the total weight percentage of zirconium, copper, and aluminum in the alloy layer of the first composite element is 98%.

[0100] Please refer to Table 5B, which presents the parameter details of the first composite element of the fifth embodiment. Table 5B Da (g / cm 3) 6.68 Ts (mm) 0.5 Ha (HV) 480 LCc (mm) 19.60 TCa (W / mK) 2.5 LLC (mm) 20.00 Ta (mm) 0.50 LSc (mm) 8.00 Material of the substrate Titanium alloy Lc (mm) 19.60 Ds (g / cm 3) 4.51 Ll (mm) 224.73 Hs (HV) 350 Ls (mm) 152.53 TCs (W / mK) 15.24 Parameter calculation Da / Ds 1.48 LCc / Lc 1.00 Ha / Hs 1.37 LLc / Ll 0.09 TCs / TCa 6.10 LSc / Ls 0.05 Ta / Ts 1.00

[0101] In the fifth embodiment, the substrate of the first composite element is made of titanium alloy, the total length of the composite layer in the transition area is 19.60 mm, the total length of the composite layer in the long side area is 20.00 mm, the total length of the composite layer in the short side area is 8.00 mm, the length of the transition area is 19.60 mm, the length of the long side area is 224.73 mm, and the length of the short side area is 152.53 mm.

[0102] The second composite element includes a composite structure comprising a substrate and a composite layer, wherein the composite layer is disposed on the surface of the substrate, the substrate being made of glass, and the composite layer comprising an alloy layer. Furthermore, the parameter details of the composite layer and alloy layer of the composite structure of the second composite element in the fifth embodiment can be the same as those of the composite layer and alloy layer of the composite structure of the first composite element; therefore, please refer to the preceding paragraph for the same details, which will not be repeated here.

[0103] Please refer to Table 5C, which presents the parameter details of the second composite element in the fifth embodiment. Table 5C Ac (mm 2) 19000.00 Ac / As 0.432 As (mm 2) 43991.94

[0104] [Sixth Embodiment]

[0105] The mobile device in the sixth embodiment can be a watch, and the mobile device includes a first composite element and a second composite element. In the sixth embodiment, the first composite element is the middle frame of the watch, and the second composite element is the front bezel of the watch.

[0106] The first composite element includes a composite structure. The composite structure includes a substrate and a composite layer, with the composite layer disposed on the surface of the substrate. The composite layer includes an alloy layer, which is an amorphous alloy, wherein the alloy layer includes at least three metals, and the at least three metals include zirconium, copper, aluminum, and niobium.

[0107] Please refer to Table 6A, which shows the composition and proportions of the alloy layer of the first composite element in the sixth embodiment. Table 6A Structure of alloy layer Amorphous alloy Element zirconium copper aluminum niobium Pzr (%) 70 Pcu (%) twenty four Pal (%) 4 Niobium in the alloy layer (weight percentage) 2 Pzr+Pcu+Pal (%) 98

[0108] In the sixth embodiment, the total weight percentage of zirconium, copper, and aluminum in the alloy layer of the first composite element is 98%.

[0109] Please refer to Table 6B, which presents the parameter details of the first composite element of the sixth embodiment, wherein the substrate of the first composite element is made of titanium alloy. Table 6B Da (g / cm 3) 6.68 Ds (g / cm 3) 4.51 Ha (HV) 480 Hs (HV) 155 TCa (W / mK) 2.5 TCs (W / mK) 15.24 Ta (mm) 0.75 Ts (mm) 0.8 Parameter calculation Da / Ds 1.48 TCs / TCa 6.10 Ha / Hs 3.10 Ta / Ts 0.94

[0110] The second composite element includes a composite structure comprising a substrate and a composite layer, wherein the composite layer is disposed on the surface of the substrate, the substrate being made of titanium alloy, and the composite layer comprising an alloy layer. Furthermore, the parameter details of the alloy layer of the composite structure of the second composite element in the sixth embodiment can be the same as those of the alloy layer of the composite structure of the first composite element; therefore, please refer to the preceding paragraph for the same details, which will not be repeated here.

[0111] Please refer to Table 6C, which presents the parameter details of the second composite element in the sixth embodiment. Table 6C Ac (mm 2) 28.15 Ac / As 0.018 As (mm 2) 1590.43

[0112] [Seventh Embodiment]

[0113] The mobile device in the seventh embodiment may be a tablet computer, and the mobile device includes a first composite element and a second composite element, wherein the first composite element is the mid-frame of the tablet computer and the second composite element is the back panel of the tablet computer.

[0114] The first composite element has a transition region, a long side region, and a short side region, and the first composite element includes a composite structure. The composite structure includes a substrate and a composite layer, and the composite layer is disposed on the surface of the substrate. The composite layer includes an alloy layer, the alloy layer is an amorphous alloy, wherein the alloy layer includes at least three metals, and the at least three metals include zirconium, copper, aluminum, nickel, and titanium.

[0115] Please refer to Table 7A, which shows the composition and proportions of the alloy layer of the first composite element in the seventh embodiment. Table 7A Structure of alloy layer Amorphous alloy Element zirconium copper aluminum nickel titanium Pzr (%) 65 Pcu (%) 16 Pal (%) 4 Nickel weight percentage (%) in the alloy layer 12 Titanium weight percentage (%) in alloy layer 3 Pzr+Pcu+Pal (%) 85

[0116] In the seventh embodiment, the total weight percentage of zirconium, copper, and aluminum in the alloy layer of the first composite element is 85%.

[0117] Please refer to Table 7B, which presents the parameter details of the first composite element in the seventh embodiment. Table 7B Da (g / cm 3) 6.65 Ts (mm) 1.0 Ha (HV) 540 LCc (mm) 21.00 TCa (W / mK) 2.5 LLC (mm) 30.00 Ta (mm) 0.85 LSc (mm) 15.00 Material of the substrate Stainless steel Lc (mm) 22.11 Ds (g / cm 3) 7.93 Ll (mm) 253.44 Hs (HV) 200 Ls (mm) 187.34 TCs (W / mK) 15 Parameter calculation Da / Ds 0.84 LCc / Lc 0.95 Ha / Hs 2.70 LLc / Ll 0.12 TCs / TCa 6.00 LSc / Ls 0.08 Ta / Ts 0.85

[0118] In the seventh embodiment, the substrate of the first composite element is made of stainless steel, the total length of the composite layer in the transition area is 21.00 mm, the total length of the composite layer in the long side area is 30.00 mm, the total length of the composite layer in the short side area is 15.00 mm, the length of the transition area is 22.11 mm, the length of the long side area is 253.44 mm, and the length of the short side area is 187.34 mm.

[0119] The second composite element includes a composite structure comprising a substrate and a composite layer, wherein the composite layer is disposed on the surface of the substrate, the substrate being made of plastic, and the composite layer comprising an alloy layer. Furthermore, the parameter details of the composite layer and alloy layer of the composite structure of the second composite element in the seventh embodiment can be the same as those of the composite layer and alloy layer of the composite structure of the first composite element; therefore, please refer to the preceding paragraph for the same details, which will not be repeated here.

[0120] Please refer to Table 7C, which presents the parameter details of the second composite element in the seventh embodiment. Table 7C Ac (mm 2) 25000.00 Ac / As 0.415 As (mm 2) 60265.33

[0121] [Embodiment 8]

[0122] The mobile device in the eighth embodiment may be a tablet computer, and the mobile device includes a first composite element and a second composite element, wherein the first composite element is the mid-frame of the tablet computer and the second composite element is the back panel of the tablet computer.

[0123] The first composite element has a transition region, a long side region, and a short side region, and the first composite element includes a composite structure. The composite structure includes a substrate and a composite layer, and the composite layer is disposed on the surface of the substrate. The composite layer includes an alloy layer, the alloy layer is an amorphous alloy, wherein the alloy layer includes at least three metals, and the at least three metals include zirconium, copper, aluminum, nickel, and titanium.

[0124] Please refer to Table 8A, which shows the composition and proportions of the alloy layer of the first composite element in the eighth embodiment. Table 8A Structure of alloy layer Amorphous alloy Element zirconium copper aluminum nickel titanium Pzr (%) 65 Pcu (%) 16 Pal (%) 4 Nickel weight percentage (%) in the alloy layer 12 Titanium weight percentage (%) in alloy layer 3 Pzr+Pcu+Pal (%) 85

[0125] In the 8th embodiment, the total weight percentage of zirconium, copper, and aluminum in the alloy layer of the first composite element is 85%.

[0126] Please refer to Table 8B, which presents the parameter details of the first composite element in the eighth embodiment. Table 8B Da (g / cm 3) 6.65 Ts (mm) 1.2 Ha (HV) 540 LCc (mm) 21.50 TCa (W / mK) 2.5 LLC (mm) 30.00 Ta (mm) 0.95 LSc (mm) 18.00 Material of the substrate Stainless steel Lc (mm) 22.40 Ds (g / cm 3) 7.93 Ll (mm) 256.86 Hs (HV) 200 Ls (mm) 156.86 TCs (W / mK) 15 Parameter calculation Da / Ds 0.84 LCc / Lc 0.96 Ha / Hs 2.70 LLc / Ll 0.12 TCs / TCa 6.00 LSc / Ls 0.11 Ta / Ts 0.79

[0127] In the 8th embodiment, the substrate of the first composite element is made of stainless steel, the total length of the composite layer in the transition area is 21.50 mm, the total length of the composite layer in the long side area is 30.00 mm, the total length of the composite layer in the short side area is 18.00 mm, the length of the transition area is 22.40 mm, the length of the long side area is 256.86 mm, and the length of the short side area is 156.86 mm.

[0128] The second composite element includes a composite structure comprising a substrate and a composite layer, wherein the composite layer is disposed on the surface of the substrate, the substrate being made of aluminum alloy, and the composite layer comprising an alloy layer. Furthermore, the parameter details of the composite layer and alloy layer of the composite structure of the second composite element in the eighth embodiment can be the same as those of the composite layer and alloy layer of the composite structure of the first composite element; therefore, please refer to the preceding paragraph for the same details, which will not be repeated here.

[0129] Please refer to Table 8C, which presents the parameter details of the second composite element in the eighth embodiment. Table 8C Ac (mm 2) 23000.00 Ac / As 0.438 As (mm 2) 52482.30

[0130] [Version 9]

[0131] The mobile device in the 9th embodiment may be a tablet computer, and the mobile device includes a first composite element and a second composite element, wherein the first composite element is the mid-frame of the tablet computer and the second composite element is the back panel of the tablet computer.

[0132] The first composite element has a transition region, a long side region, and a short side region, and the first composite element includes a composite structure. The composite structure includes a substrate and a composite layer, and the composite layer is disposed on the surface of the substrate. The composite layer includes an alloy layer, the alloy layer is an amorphous alloy, wherein the alloy layer includes at least three metals, and the at least three metals include zirconium, copper, aluminum, nickel, and titanium.

[0133] Please refer to Table 9A, which shows the composition and proportions of the alloy layer of the first composite element in the 9th embodiment. Table 9A Structure of alloy layer Amorphous alloy Element zirconium copper aluminum nickel titanium Pzr (%) 65 Pcu (%) 16 Pal (%) 4 Nickel weight percentage (%) in the alloy layer 12 Titanium weight percentage (%) in alloy layer 3 Pzr+Pcu+Pal (%) 85

[0134] In the 9th embodiment, the total weight percentage of zirconium, copper, and aluminum in the alloy layer of the first composite element is 85%.

[0135] Please refer to Table 9B, which presents the parameter details of the first composite element in the ninth embodiment. Table 9B Da (g / cm 3) 6.65 Ts (mm) 1.2 Ha (HV) 540 LCc (mm) 25.62 TCa (W / mK) 2.5 LLC (mm) 28.00 Ta (mm) 1.05 LSc (mm) 20.00 Material of the substrate aluminum alloy Lc (mm) 25.62 Ds (g / cm 3) 2.82 Ll (mm) 293.76 Hs (HV) 68 Ls (mm) 175.96 TCs (W / mK) 125 Parameter calculation Da / Ds 2.36 LCc / Lc 1.00 Ha / Hs 7.94 LLc / Ll 0.10 TCs / TCa 50.00 LSc / Ls 0.11 Ta / Ts 0.88

[0136] In the 9th embodiment, the substrate of the first composite element is made of aluminum alloy, the total length of the composite layer in the transition area is 25.62 mm, the total length of the composite layer in the long side area is 28.00 mm, the total length of the composite layer in the short side area is 20.00 mm, the length of the transition area is 25.62 mm, the length of the long side area is 293.76 mm, and the length of the short side area is 175.96 mm.

[0137] The second composite element includes a composite structure comprising a substrate and a composite layer, wherein the composite layer is disposed on the surface of the substrate, the substrate being made of titanium alloy, and the composite layer comprising an alloy layer. Furthermore, the parameter details of the composite layer and alloy layer of the composite structure of the second composite element in the 9th embodiment can be the same as those of the composite layer and alloy layer of the composite structure of the first composite element; therefore, please refer to the preceding paragraph for the same details, which will not be repeated here.

[0138] Please refer to Table 9C, which presents the parameter details of the second composite element in the 9th embodiment. Table 9C Ac (mm 2) 34000.00 Ac / As 0.504 As (mm 2) 67523.49

[0139] [Embodiment 10]

[0140] The mobile device in the 10th embodiment may be a tablet computer, and the mobile device includes a first composite element and a second composite element, wherein the first composite element is the mid-frame of the tablet computer and the second composite element is the back panel of the tablet computer.

[0141] The first composite element has a transition region, a long side region, and a short side region, and the first composite element includes a composite structure. The composite structure includes a substrate and a composite layer, and the composite layer is disposed on the surface of the substrate. The composite layer includes an alloy layer, the alloy layer is an amorphous alloy, wherein the alloy layer includes at least three metals, and the at least three metals include zirconium, copper, aluminum, nickel, and titanium.

[0142] Please refer to Table 10A, which shows the composition and proportions of the alloy layer of the first composite element in the 10th embodiment. Table 10A Structure of alloy layer Amorphous alloy Element zirconium copper aluminum nickel titanium Pzr (%) 65 Pcu (%) 16 Pal (%) 4 Nickel weight percentage (%) in the alloy layer 12 Titanium weight percentage (%) in alloy layer 3 Pzr+Pcu+Pal (%) 85

[0143] In the 10th embodiment, the total weight percentage of zirconium, copper, and aluminum in the alloy layer of the first composite element is 85%.

[0144] Please refer to Table 10B, which presents the parameter details of the first composite element of the tenth embodiment. Table 10B Da (g / cm 3) 6.65 Ts (mm) 1.8 Ha (HV) 540 LCc (mm) 19.00 TCa (W / mK) 2.5 LLC (mm) 30.00 Ta (mm) 1.10 LSc (mm) 20.00 Material of the substrate aluminum alloy Lc (mm) 19.94 Ds (g / cm 3) 2.81 Ll (mm) 228.56 Hs (HV) 162 Ls (mm) 139.79 TCs (W / mK) 163 Parameter calculation Da / Ds 2.37 LCc / Lc 0.95 Ha / Hs 3.33 LLc / Ll 0.13 TCs / TCa 65.20 LSc / Ls 0.14 Ta / Ts 0.61

[0145] In the 10th embodiment, the substrate of the first composite element is made of aluminum alloy, the total length of the composite layer in the transition area is 19.00 mm, the total length of the composite layer in the long side area is 30.00 mm, the total length of the composite layer in the short side area is 20.00 mm, the length of the transition area is 19.94 mm, the length of the long side area is 228.56 mm, and the length of the short side area is 139.79 mm.

[0146] The second composite element includes a composite structure comprising a substrate and a composite layer, wherein the composite layer is disposed on the surface of the substrate, the substrate being made of glass, and the composite layer comprising an alloy layer. Furthermore, the parameter details of the composite layer and alloy layer of the composite structure of the second composite element in the 10th embodiment can be the same as those of the composite layer and alloy layer of the composite structure of the first composite element; therefore, please refer to the preceding paragraph for the same details, which will not be repeated here.

[0147] Please refer to Table 10C, which presents the parameter details of the second composite element in the tenth embodiment. Table 10C Ac (mm 2) 22000.00 Ac / As 0.529 As (mm 2) 41606.32

[0148] [Embodiment 11]

[0149] The mobile device in the 11th embodiment may be a tablet computer, and the mobile device includes a first composite element and a second composite element, wherein the first composite element is the mid-frame of the tablet computer and the second composite element is the back panel of the tablet computer.

[0150] The first composite element has a transition region, a long side region, and a short side region, and the first composite element includes a composite structure. The composite structure includes a substrate and a composite layer, and the composite layer is disposed on the surface of the substrate. The composite layer includes an alloy layer, the alloy layer is an amorphous alloy, wherein the alloy layer includes at least three metals, and the at least three metals include zirconium, copper, aluminum, nickel, and titanium.

[0151] Please refer to Table 11A, which shows the composition and proportions of the alloy layer of the first composite element in the 11th embodiment. Table 11A Structure of alloy layer Amorphous alloy Element zirconium copper aluminum nickel titanium Pzr (%) 65 Pcu (%) 16 Pal (%) 4 Nickel weight percentage (%) in the alloy layer 12 Titanium weight percentage (%) in alloy layer 3 Pzr+Pcu+Pal (%) 85

[0152] In the 11th embodiment, the total weight percentage of zirconium, copper, and aluminum in the alloy layer of the first composite element is 85%.

[0153] Please refer to Table 11B, which presents the parameter details of the first composite element of the 11th embodiment. Table 11B Da (g / cm 3) 6.65 Ts (mm) 1.3 Ha (HV) 540 LCc (mm) 25.01 TCa (W / mK) 2.5 LLC (mm) 10.00 Ta (mm) 1.15 LSc (mm) 5.00 Material of the substrate aluminum alloy Lc (mm) 25.01 Ds (g / cm 3) 2.69 Ll (mm) 286.72 Hs (HV) 83 Ls (mm) 174.24 TCs (W / mK) 200 Parameter calculation Da / Ds 2.47 LCc / Lc 1.00 Ha / Hs 6.51 LLc / Ll 0.03 TCs / TCa 80.00 LSc / Ls 0.03 Ta / Ts 0.88

[0154] In the 11th embodiment, the substrate of the first composite element is made of aluminum alloy, the total length of the composite layer in the transition area is 25.01 mm, the total length of the composite layer in the long side area is 10.00 mm, the total length of the composite layer in the short side area is 5.00 mm, the length of the transition area is 25.01 mm, the length of the long side area is 286.72 mm, and the length of the short side area is 174.24 mm.

[0155] The second composite element includes a composite structure comprising a substrate and a composite layer, wherein the composite layer is disposed on the surface of the substrate, the substrate being made of plastic, and the composite layer comprising an alloy layer. Furthermore, the parameter details of the composite layer and alloy layer of the composite structure of the second composite element in the 11th embodiment can be the same as those of the composite layer and alloy layer of the composite structure of the first composite element; therefore, please refer to the preceding paragraph for the same details, which will not be repeated here.

[0156] Please refer to Table 11C, which presents the parameter details of the second composite element of the 11th embodiment. Table 11C Ac (mm 2) 35000.00 Ac / As 0.537 As (mm 2) 65122.47

[0157] [Embodiment 12]

[0158] The mobile device in the 12th embodiment can be a watch, and the mobile device includes a first composite element and a second composite element. In the 12th embodiment, the first composite element is the middle frame of the watch, and the second composite element is the front bezel of the watch.

[0159] The first composite element includes a composite structure. The composite structure includes a substrate and a composite layer, with the composite layer disposed on the surface of the substrate. The composite layer includes an alloy layer, which is an amorphous alloy, wherein the alloy layer includes at least three metals, and the at least three metals include zirconium, copper, aluminum, nickel, and titanium.

[0160] Please refer to Table 12A, which shows the composition and proportions of the alloy layer of the first composite element in the 12th embodiment. Table 12A Structure of alloy layer Amorphous alloy Element zirconium copper aluminum nickel titanium Pzr (%) 65 Pcu (%) 16 Pal (%) 4 Nickel weight percentage (%) in the alloy layer 12 Titanium weight percentage (%) in alloy layer 3 Pzr+Pcu+Pal (%) 85

[0161] In the 12th embodiment, the total weight percentage of zirconium, copper, and aluminum in the alloy layer of the first composite element is 85%.

[0162] Please refer to Table 12B, which presents the parameter details of the first composite element of the 12th embodiment, wherein the substrate of the first composite element is made of titanium alloy. Table 12B Da (g / cm 3) 6.65 Ds (g / cm 3) 4.51 Ha (HV) 540 Hs (HV) 350 TCa (W / mK) 2.5 TCs (W / mK) 15.24 Ta (mm) 0.60 Ts (mm) 0.8 Parameter calculation Da / Ds 1.47 TCs / TCa 6.10 Ha / Hs 1.54 Ta / Ts 0.75

[0163] The second composite element includes a composite structure comprising a substrate and a composite layer, wherein the composite layer is disposed on the surface of the substrate, the substrate being made of titanium alloy, and the composite layer comprising an alloy layer. Furthermore, the parameter details of the alloy layer of the composite structure of the second composite element in the 12th embodiment can be the same as the parameter details of the alloy layer of the composite structure of the first composite element; therefore, please refer to the preceding paragraph for the same details, which will not be repeated here.

[0164] Please refer to Table 12C, which presents the parameter details of the second composite element in the 12th embodiment. Table 12C Ac (mm 2) 79.33 Ac / As 0.039 As (mm 2) 2042.82

[0165] [Embodiment 13]

[0166] Please refer to Figure 4, which is a front view of the mobile device 20 of the 13th embodiment of this disclosure.

[0167] The mobile device 20 of the 13th embodiment is a watch, and the mobile device includes a composite element 21 and a surface 22. The composite element 21 is the middle frame of the watch and surrounds the outer peripheral surface of the surface 22. The composite element 21 includes a composite structure 210, which includes a substrate (not shown) and a composite layer (not shown), and the composite layer is disposed on the surface of the substrate.

[0168] Furthermore, the mobile device 20 of the 13th embodiment can be the same as the mobile devices of the 6th and 12th embodiments. For related details, please refer to the descriptions of the 6th and 12th embodiments, which will not be repeated here.

[0169] [Example 14]

[0170] Please refer to Figures 5 and 6. Figure 5 is a front view of the mobile device 30 according to the 14th embodiment of this disclosure, and Figure 6 is a side view of the mobile device 30 according to Figure 5.

[0171] The mobile device 30 of the 14th embodiment is a watch, and the mobile device includes a composite element 31 and a surface 32. The composite element 31 is the front bezel of the watch and surrounds the outer periphery of the surface 32. The composite element 31 includes a composite structure 310, which includes a substrate (not shown) and a composite layer 312, and the composite layer 312 is disposed on the surface of the substrate.

[0172] As shown in Figure 6, the area Ac of the composite layer 312 on the composite element 31 refers to the area of ​​the composite layer 312 projected onto a single surface of the composite element 31, while the area As of the substrate on the composite element 31 refers to the area of ​​the substrate projected onto a single surface of the composite element 31.

[0173] Furthermore, the mobile device 30 of the 14th embodiment can be the same as the mobile devices of the 6th and 12th embodiments. For details, please refer to the descriptions of the 6th and 12th embodiments, which will not be repeated here.

[0174] [Example 15]

[0175] Please refer to Figure 7, which is a partial schematic diagram of the composite element 41 of the 15th embodiment of this disclosure. The composite element 41 includes a composite structure 410, which includes a substrate 411 and a composite layer 412, and the composite layer 412 is disposed on the surface of the substrate 411.

[0176] In the 15th embodiment, the composite structure 410 further includes a buffer layer 413, which is located between the composite layer 412 and the substrate 411, so as to avoid the composite structure 410 being directly damaged by the substrate 411 with lower hardness when it is impacted.

[0177] Furthermore, the composite element 41 of the 15th embodiment can be applied to the mobile devices of the 1st to 12th embodiments, and related details can be found in the descriptions of the 1st to 12th embodiments, which will not be repeated here.

[0178] Although the present disclosure has been described above with reference to embodiments, it is not intended to limit the present disclosure. Anyone skilled in the art may make various modifications and alterations without departing from the spirit and scope of the present disclosure. Therefore, the scope of protection of the present disclosure shall be determined by the appended claims.

[0179] 10, 20, 30: Mobile Devices 11,12,21,31,41: Composite components 13: Screen 22,32: Surface 101: Turning Point 102: Long Side Area 103: Short Side Zone 110, 120, 210, 310, 410: Composite structure 111,411: Substrate 112, 312, 412: Composite layer 113: Alloy layer 114: Outer layer 115: Intermediate Layer 413: Buffer layer A: Air P: Horizontal section Pzr: weight percentage of zirconium in the alloy layer Pcu: Weight percentage of copper in the alloy layer Pal: Weight percentage of aluminum in the alloy layer Da: Density of the alloy layer Ha: Hardness of the alloy layer TCa: Thermal conductivity of the alloy layer Ta: Alloy layer thickness Ds: Density of the substrate Hs: Hardness of the substrate TCs: Thermal conductivity of the substrate Ts: Thickness of the substrate LCc: Total length of the composite layer in the transition region LLC: Total length of the composite layer in the long side region LSc: Total length of the composite layer in the short side region Lc: Length of the transition zone Ll: Length of the long side region Ls: Length of the short side region Ac: Area of ​​the composite layer in the composite element As: Area of ​​the substrate in the composite element

Claims

1. A composite element, comprising: a composite structure including a substrate and a composite layer, the composite layer being disposed on a surface of the substrate; wherein, The substrate is made of an aluminum alloy, and the composite layer includes an alloy layer; wherein the alloy layer includes at least three metals, including zirconium, copper and aluminum; wherein the composite element has a transition region, the total length of the composite layer in the transition region is LCc, the length of the transition region is Lc, the thickness of the alloy layer is Ta, and the thickness of the substrate is Ts, which satisfy the following conditions: 0.75 ≤ LCc / Lc; and 0.50 ≤ Ta / Ts ≤ 1.

00.

2. The composite element as claimed in claim 1, wherein the zirconium in the alloy layer is Pzr by weight, the copper in the alloy layer is Pcu by weight, and the aluminum in the alloy layer is Pal by weight, satisfying the following conditions: 60% ≤ Pzr ≤ 90%; 5% ≤ Pcu ≤ 23%; and 2% ≤ Pal ≤ 6%.

3. The composite element as claimed in claim 1, wherein the density of the alloy layer is Da and the density of the substrate is Ds, which satisfy the following condition: 1.5 ≤ Da / Ds ≤ 3.

5.

4. The composite element as claimed in claim 1, wherein the thermal conductivity of the alloy layer is TCa and the thermal conductivity of the substrate is TCs, which satisfy the following condition: 30 ≤ TCs / TCa.

5. The composite element as claimed in claim 1, wherein the hardness of the alloy layer is Ha, which satisfies the following conditions: 400 HV ≤ Ha ≤ 1000 HV.

6. The composite element as claimed in claim 5, wherein the hardness of the alloy layer is Ha and the hardness of the substrate is Hs, which satisfy the following condition: 5.00 ≤ Ha / Hs ≤ 10.

00.

7. The composite element as claimed in claim 1, wherein the thickness of the alloy layer is Ta, which satisfies the following condition: 0.5 mm ≤ Ta ≤ 1.5 mm.

8. The composite element as claimed in claim 1, wherein the composite structure further comprises: a buffer layer located between the composite layer and the substrate.

9. The composite element as claimed in claim 1, wherein the composite element is a middle frame and the composite element has a long side region and a short side region.

10. The composite element as claimed in claim 9, wherein the total length of the composite layer in the transition region is LCc, and the length of the transition region is Lc, which satisfies the following condition: 0.85 ≤ LCc / Lc.

11. The composite element as claimed in claim 10, wherein the total length of the composite layer over the long side region is LLc, and the length of the long side region is Ll, ​​which satisfies the following condition: 0 < LLc / Ll ≤ 0.

15.

12. The composite element as claimed in claim 11, wherein the total length of the composite layer in the short side region is LSc, and the length of the short side region is Ls, which satisfies the following condition: 0.05 ≤ LSc / Ls ≤ 0.

15.

13. A mobile device comprising: the composite element as described in claim 1, wherein the mobile device is a mobile phone or a tablet computer.

14. A composite element, comprising: a composite structure including a substrate and a composite layer, the composite layer being disposed on a surface of the substrate; wherein, The composite layer comprises an alloy layer; wherein the alloy layer comprises at least three metals, the at least three metals comprising zirconium, copper and aluminum; wherein the area of ​​the composite layer in the composite element is Ac, the area of ​​the substrate in the composite element is As, the thickness of the alloy layer is Ta, and the thickness of the substrate is Ts, which satisfy the following conditions: 0.200 ≤ Ac / As; and 0.20 ≤ Ta / Ts ≤ 2.

00.

15. The composite element as claimed in claim 14, wherein the zirconium in the alloy layer is Pzr by weight, the copper in the alloy layer is Pcu by weight, and the aluminum in the alloy layer is Pal by weight, satisfying the following condition: 95% ≤ Pzr + Pcu + Pal.

16. The composite element as claimed in claim 14, wherein the hardness of the alloy layer is Ha, which satisfies the following condition: 300 HV ≤ Ha.

17. The composite element as claimed in claim 16, wherein the hardness of the substrate is Hs, which satisfies the following condition: Hs ≤ 250 HV.

18. The composite element as claimed in claim 17, wherein the density of the alloy layer is Da and the density of the substrate is Ds, which satisfy the following condition: Da / Ds ≤ 5.

0.

19. The composite element as claimed in claim 18, wherein the thermal conductivity of the substrate is TCs, which satisfies the following condition: 5 W / mK ≤ TCs.

20. The composite element as claimed in claim 19, wherein the thermal conductivity of the alloy layer is TCa and the thermal conductivity of the substrate is TCs, which satisfy the following condition: 5 ≤ TCs / TCa.

21. The composite element as claimed in claim 20, wherein the substrate is made of an aluminum alloy, a titanium alloy, or a stainless steel.

22. The composite element as claimed in claim 14, wherein the thickness of the alloy layer is Ta, which satisfies the following condition: 0.3 mm < Ta.

23. The composite element as claimed in claim 14, wherein the composite element is a back panel or a front bezel.

24. The composite element as claimed in claim 23, wherein the area of ​​the composite layer in the composite element is Ac, and the area of ​​the substrate in the composite element is As, which satisfies the following condition: 0.350 ≤ Ac / As ≤ 0.

450.

25. A mobile device comprising: the composite element as described in claim 23.

26. The mobile device as claimed in claim 25, wherein the composite element has a transition region, a long side region, and a short side region, and the alloy layer is an amorphous alloy; wherein, The alloy layer has a hardness of Ha, the substrate has a hardness of Hs, the alloy layer has a thickness of Ta, the substrate has a thickness of Ts, the total length of the composite layer in the transition region is LCc, the length of the transition region is Lc, the total length of the composite layer in the long side region is LLCc, the length of the long side region is Ll, ​​the total length of the composite layer in the short side region is LSc, and the length of the short side region is Ls, satisfying the following conditions: 6.00 ≤ Ha / Hs ≤ 8.00; 0.60 ≤ Ta / Ts ≤ 0.90; 0.90 ≤ LCc / Lc ≤ 1.00; 0.05 ≤ LLCc / Ll ≤ 0.10; and 0.10 ≤ LSc / Ls ≤ 0.13.

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