Display panel, display device and preparation method of display panel

Abstract

The invention discloses a display panel, a display device and a preparation method of the display panel, and the display panel comprises a substrate which is provided with a first surface and a second surface which are opposite to each other; the first wire is arranged on one side of the first surface of the substrate, the second wire is arranged on one side of the second surface of the substrate, and a first groove is formed in the surface, away from the substrate, of the first wire; and the side wiring is electrically connected with the first wiring and the second wiring, and the orthographic projection of the side wiring on the substrate and the orthographic projection of the first groove on the substrate are at least partially overlapped. In this way, the product yield can be improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display panel, a display device, and a method for manufacturing the display panel. Background Technology

[0002] In recent years, Micro-LED display panels have experienced rapid development due to their superior performance. To achieve displays ranging from small to large screens, splicing technology has become a priority, and side wiring is a crucial part of splicing. During its long-term research and development process, the applicant of this application discovered a problem of side wiring detachment in current display panel processing. Therefore, improving side wiring to effectively increase the yield of display panels has become one of the urgent technical problems to be solved at this stage. Summary of the Invention

[0003] The main technical problem addressed by this application is to provide a display panel, a display device, and a method for manufacturing the display panel, which can improve product yield.

[0004] To solve the above-mentioned technical problems, one technical solution adopted in this application is: to provide a display panel, comprising: a substrate having a first surface and a second surface facing away from each other; a first trace and a second trace, the first trace being disposed on one side of the first surface of the substrate, and the second trace being disposed on one side of the second surface of the substrate, wherein the first trace has a first groove on the surface of the substrate facing away from it; and a side trace electrically connecting the first trace and the second trace, wherein the orthographic projection of the side trace on the substrate at least partially overlaps the orthographic projection of the first groove on the substrate.

[0005] To solve the above-mentioned technical problems, another technical solution adopted in this application is: providing a display component, including: a substrate having a first surface and a second surface facing away from each other; a first trace and a second trace, the first trace being disposed on one side of the first surface of the substrate, and the second trace being disposed on one side of the second surface of the substrate; a protective film being attached to one side of the first surface of the substrate and extending partially to the side of the first trace away from the substrate to cover a portion of the first trace; and a side trace electrically connecting the first trace and the second trace, wherein the side trace has a first breakable structure at a first end on the first surface, and the orthographic projection of the first breakable structure on the substrate is located within the orthographic projection of the first trace on the substrate.

[0006] To solve the above-mentioned technical problems, another technical solution adopted in this application is to provide a display device, including a display panel as described in any of the above claims, or including a display component as described in any of the above claims.

[0007] To solve the above-mentioned technical problems, another technical solution adopted in this application is: providing a method for manufacturing a display panel, the method comprising: providing a substrate, the substrate having a first surface and a second surface opposite to each other; forming a first trace on the first surface of the substrate and forming a second trace on the second surface of the substrate; attaching a protective film to one side of the first surface of the substrate, wherein the orthographic projection of the protective film on the substrate covers a portion of the orthographic projection of the first trace on the substrate; forming a side trace electrically connecting the first trace and the second trace, wherein the side trace has a first breakable structure at a first end on the first surface, the orthographic projection of the first breakable structure on the substrate being within the orthographic projection of the first trace on the substrate; and removing the protective film.

[0008] The beneficial effects of this application are as follows: Unlike the prior art, this application provides a first groove on the surface of the first trace away from the substrate, and the orthographic projection of the side trace on the substrate at least partially overlaps with the orthographic projection of the first groove on the substrate. This ensures that during the manufacturing process, even if the side trace does not break at the junction with the protective film, it will break at the first groove when the protective film is removed. This avoids the phenomenon of side trace peeling when the protective film is removed, reduces the probability of the final side trace being disconnected from the first trace, and improves product yield. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0010] Figure 1 This is a schematic diagram of one embodiment of the display component shown in this application;

[0011] Figure 2 yes Figure 1 Top view of the middle substrate and the first trace;

[0012] Figure 3 This is a flowchart illustrating one embodiment of the method for manufacturing the display panel of this application;

[0013] Figure 4 yes Figure 3 A schematic diagram of the preparation process;

[0014] Figure 5 yes Figure 4 A top view of the preparation process;

[0015] Figure 6This is a schematic diagram of the structure of one embodiment of the display panel of this application;

[0016] Figure 7 This is a top view of the substrate and side traces in another embodiment of the display component of this application. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0018] See Figure 1 and Figure 2 In one embodiment of this application, the display component 100 includes a substrate 1, a first trace 2, a second trace 3, a side trace 4, and a protective film 5. Figure 1 Specifically, it's along the edge of the display panel. Figure 2 Cross-sectional view of line AA in the middle.

[0019] The substrate 1 has a first surface 11 and a second surface 12 facing away from each other. A first trace 2 is disposed on one side of the first surface 11 of the substrate 1, and a second trace 3 is disposed on one side of the second surface 12 of the substrate 1. A side trace 4 is electrically connected to the first trace 2 and the second trace 3.

[0020] Specifically, the substrate 1 plays a supporting role in the display assembly 100. The first trace 2 is disposed on one side of the first surface 11 of the substrate 1, and the second trace 3 is disposed on one side of the second surface 12 of the substrate 1. The side trace 4 is electrically connected to the first trace 2 and the second trace 3, thereby transmitting the signal from the first trace 2 to the second trace 3.

[0021] The protective film 5 is attached to one side of the first surface 11 of the substrate 1 and extends partially to the side of the first trace 2 away from the substrate 1 to cover a portion of the first trace 2. Specifically, the protective film 5 covers a portion of the first trace 2 to protect the first trace 2 and prevent it from being damaged in subsequent processes.

[0022] The side trace 4 is provided with a first breakable structure 41 at the first end of the first surface 11. The orthogonal projection of the first breakable structure 41 on the substrate 1 is located within the orthogonal projection of the first trace 2 on the substrate 1.

[0023] Specifically, the first breakable structure 41 is located within the range of the first trace 2, so that even if the side trace 4 is broken at the first breakable structure 41, the electrical connection between the first trace 2 and the side trace 4 can still be maintained.

[0024] Simultaneously combined Figure 3 , Figure 4 and Figure 5 The following describes the manufacturing method of the display panel. The display component 100 mentioned above is an intermediate product for manufacturing the display panel. The manufacturing method of the display panel includes:

[0025] S110: A substrate 1 is provided, the substrate 1 having a first surface 11 and a second surface 12 facing away from each other.

[0026] Specifically, substrate 1 can be a sapphire substrate, a glass substrate, or a flexible substrate, serving as a carrier for the device.

[0027] S120: A first trace 2 is formed on the first surface 11 of the substrate 1, and a second trace 3 is formed on the second surface 12 of the substrate 1.

[0028] Specifically, the first trace 2 is disposed on the first surface 11 of the substrate 1, and the second trace 3 is disposed on the second surface 12 of the substrate 1. The first trace 2 and the second trace 3 can be formed on the substrate 1 by coating and photolithography.

[0029] S130: A protective film 5 is attached to one side of the first surface 11 of the substrate 1. The orthographic projection of the protective film 5 on the substrate 1 covers the portion of the orthographic projection of the first trace 2 on the substrate 1.

[0030] Specifically, the protective film 5 covers a portion of the first trace 2 to ensure the integrity of the surface of the first trace 2 and facilitate subsequent processing.

[0031] S140: A side trace 4 is formed to electrically connect the first trace 2 and the second trace 3. The side trace 4 has a first breakable structure 41 at the first end of the first surface 11, and the orthographic projection of the first breakable structure 41 on the substrate 1 is located within the orthographic projection of the first trace 2 on the substrate 1.

[0032] Specifically, the side trace 4 can be formed through processes such as coating or electroplating. In forming the side trace 4, the side trace 4 may extend to the side of the protective film 5 facing away from the substrate 1.

[0033] In one application scenario, there are multiple side traces 4. Step S140 specifically involves forming a continuous side trace film layer 6, and forming multiple first fragile structures 41 on the side trace film layer 6. Subsequently, after removing the protective film 5, the side trace film layer 6 is patterned to obtain multiple spaced and insulated side traces 4. Alternatively, the side trace film layer 6 can be patterned before removing the protective film 5 to obtain multiple side traces 4. For ease of explanation, the following description will refer to the number of side traces 4 as one.

[0034] S150: Remove protective film 5.

[0035] Specifically, the protective film 5 can be removed, for example, by mechanical peeling.

[0036] In related technologies, during the manufacturing process, since the side trace 4 may extend to the side of the protective film 5 away from the substrate 1, when the protective film 5 is removed, the side trace 4 may be taken away with it, resulting in the side trace 4 being peeled off from the substrate 1, causing the side trace 4 to be unable to be electrically connected to the first trace 2.

[0037] However, this application provides a first fragile structure 41 at the first end of the side trace 4 located on the first surface 11, so that when the protective film 5 is removed during the manufacturing process, even if the side trace 4 is not broken at the junction with the protective film 5, it will break at the first fragile structure 41, thereby reducing the probability of the side trace 4 breaking from the first trace 2 and avoiding the phenomenon of the side trace 4 peeling off from the first trace 2, thereby improving the product yield.

[0038] It is understandable that if the side trace 4 breaks at the junction with the protective film 5 when the protective film 5 is removed, the first fragile structure 41 will exist in the display panel prepared by the display component 100. That is, the first fragile structure 41 will exist in the final display panel. However, if the side trace 4 breaks at the first fragile structure 41, the first fragile structure 41 will not exist in the final display panel.

[0039] Continue reading Figure 1 In one embodiment, the first trace 2 is provided with a first groove 21 on the surface away from the substrate 1, and the orthographic projection of the side trace 4 on the substrate 1 covers the orthographic projection of the first groove 21 on the substrate 1. The first breakable structure 41 is the structure in which the side trace 4 is located in the first groove 21.

[0040] Specifically, during the manufacturing process, after the first trace 2 is formed, a groove is cut into the first trace 2 to form a first groove 21. Then, when the side trace 4 is manufactured, part of the side trace 4 naturally fills the first groove 21. The side trace 4 filled in the first groove 21 forms a first easily breakable structure 41. This causes stress to concentrate at the first groove 21 when the protective film 5 is removed during the manufacturing process, making the side trace 4 at the first groove 21 easier to break. This avoids the side trace 4 peeling off when the protective film 5 is removed, thus improving product yield. It can be understood that in this embodiment, if the side trace 4 breaks at the first groove 21 when the protective film 5 is removed, then in the display panel manufactured by the display assembly 100, the display panel includes a substrate 1, the first trace 2, the second trace 3, and the side trace 4. At this time, the orthographic projection of the side trace 4 on the substrate 1 at least partially overlaps with the orthographic projection of the first groove 21 on the substrate 1. For details, please refer to [reference needed]. Figure 6In the final manufactured display panel, the orthographic projection of the side trace 4 on the substrate 1 may partially overlap with the orthographic projection of the first groove 21 on the substrate 1, or the orthographic projection of the side trace 4 on the substrate 1 may cover the orthographic projection of the first groove 21 on the substrate 1, depending on the position where the side trace 4 is disconnected at the first groove 21.

[0041] In this embodiment, the step of forming the first trace 2 on the first surface 11 of the substrate 1 in step S120 includes: forming the first trace 2 on the first surface 11 of the substrate 1 and patterning the first trace 2 to form a first groove 21 on the first trace 2. In step S130, when the protective film 5 is attached, the first groove 21 is exposed, and in step S140, when the side trace 4 is formed, the side trace 4 covers the first groove 21. That is, the orthographic projection of the side trace 4 on the substrate 1 covers the orthographic projection of the first groove 21 on the substrate 1, so that the structure of the side trace 4 located in the first groove 21 is a first fragile structure 41.

[0042] Specifically, a first trace 2 is first formed on the first surface 11 of the substrate 1, and then the patterned first trace 2 forms a first groove 21. The side trace 4 fills the first groove 21 to form a first breakable structure 41. When the protective film 5 is removed, the side trace 4 in the first breakable structure 41 can be broken at the first groove 21, thereby ensuring that the side trace 4 is electrically connected to the first trace 2.

[0043] Continue reading Figure 2 In one embodiment, there are multiple first grooves 21, and the multiple first grooves 21 are arranged at intervals along the first direction D1. The first direction D1 intersects with the second direction D2, and the second direction D2 is the direction from the non-display area to the display area through which the side trace 4 passes.

[0044] Specifically, the first trace 2 has multiple first grooves 21 arranged at intervals along the first direction D1 on the side away from the first surface 11, so that when the protective film 5 is removed, the side traces 4 at the first grooves 21 are more easily broken, further reducing the risk of the side traces 4 being peeled off.

[0045] Of course, in other embodiments, only one first groove 21 may be provided on the side wiring 4. In short, there is no limitation on the number of first grooves 21.

[0046] In one embodiment, the first groove 21 is a through groove or a blind groove. Specifically, in one application scenario, the first groove 21 can be configured as a through groove, that is, the first groove 21 is a through groove; in another application scenario, the first groove 21 can also be configured as a blind groove, for example in... Figure 1 In one embodiment, the first groove 21 is a blind groove.

[0047] In one embodiment, the depth of the first groove 21 is greater than 200 nanometers. Specifically, the depth of the first groove 21 can be set to 250 nanometers, 300 nanometers, 350 nanometers, 400 nanometers, or 450 nanometers, etc. It should be noted that this application does not limit the depth of the first groove 21.

[0048] Continue reading Figure 2 In one embodiment, the cross-section of the first groove 21 perpendicular to the substrate 1 is either a parallelogram or a triangle. In one application scenario, the cross-section of the first groove 21 perpendicular to the substrate 1 is a parallelogram. In another application scenario, the cross-section of the first groove 21 perpendicular to the substrate 1 can also be triangular. When the side trace 4 is provided with multiple first grooves 21, some of the first grooves 21 can have a cross-section perpendicular to the substrate 1 that is a parallelogram, and some of the first grooves 21 can have a cross-section perpendicular to the substrate 1 that is triangular, specifically as follows: Figure 2 As shown. It should be noted that this application does not limit the cross-sectional shape of the first groove 21. For example, in other embodiments, the cross-section of the first groove 21 perpendicular to the substrate 1 may also be circular or rectangular.

[0049] In one embodiment, the thickness of the first trace 2 ranges from 720 nanometers to 880 nanometers. Specifically, the thickness of the first trace 2 can be 720 nanometers, 760 nanometers, 800 nanometers, 840 nanometers, or 880 nanometers, etc. It should be noted that this application does not limit the thickness of the first trace 2.

[0050] See Figure 7 Unlike the above embodiments, the first fragile structure 41 is at least one second groove 42 provided at the first end of the side wiring 4.

[0051] Specifically, the second groove 42 can be formed by etching. The side trace 4 is provided with the second groove 42 at the first end of the first surface 11, so that the side trace 4 is more fragile at the second groove 42 compared with other positions. Therefore, when the protective film 5 is removed, the side trace 4 is easier to break at the second groove 42, thereby reducing the risk of the side trace 4 being peeled off.

[0052] Continue reading Figure 7 In one embodiment, there are multiple second grooves 42, which are arranged at intervals along a first direction D1. The first direction D1 intersects with a second direction D2, which is the direction from the non-display area to the display area through which the side trace 4 passes.

[0053] Specifically, multiple second grooves 42 are arranged at intervals along the first direction D1, which can reduce the difficulty of the side trace 4 breaking at the second groove 42 on the one hand, and make the broken edge of the side trace 4 neat on the other hand.

[0054] In one embodiment, the second groove 42 is a through groove or a blind groove, for example in Figure 7 In this embodiment, the second groove 42 is a through groove.

[0055] Specifically, when the first fragile structure 41 is at least one second groove 42 provided at the first end of the side trace 4, the surface of the first trace 2 facing away from the substrate 1 is a plane. That is to say, unlike the above embodiment, the surface of the first trace 2 facing away from the substrate 1 is no longer provided with the first groove 21.

[0056] In this embodiment, the step of forming the side trace 4 that electrically connects the first trace 2 and the second trace 3 in step S140 includes: forming a side trace 4 with a planar surface away from the substrate 1, and patterning the side trace 4 to form at least one second groove 42 at the first end of the side trace 4, wherein the first brittle structure 41 includes at least one second groove 42.

[0057] Specifically, after the protective film 5 is applied, a side trace 4 is first formed on one side of the first surface 11 of the substrate 1. Then, at least one second groove 42 is formed by patterning at one end of the side trace 4 located on the first surface 11. The orthographic projection of the second groove 42 on the substrate 1 is located within the orthographic projection of the first trace 2 on the substrate 1. Thus, while ensuring the electrical connection between the side trace 4 and the first trace 2, the first fragile structure 41 is processed.

[0058] Combination Figure 2 as well as Figure 7 In one embodiment, there are multiple side traces 4, which are arranged at intervals along the first direction D1. Each side trace 4 has a first breakable structure 41 at its first end.

[0059] Specifically, each of the multiple side traces 4 has a first breakable structure 41 at its first end. When the protective film 5 is removed, the multiple side traces 4 are easily separated at the first breakable structure 41, or the side trace film layer 6 is more easily broken, further reducing the risk of peeling off the side traces 4 or the side trace film layer 6. However, in other embodiments, a portion of the side traces 4 may also have the first breakable structure 41 at their first ends.

[0060] In one embodiment, the first breakable structures 41 of the multiple side traces 4 are arranged along a first straight line. The advantage of this arrangement is that it increases the success rate of breaking the multiple side traces 4 through the first breakable structures 41, and at the same time makes the edges of the side traces 4 neat when they are torn off, or increases the success rate of breaking the side trace film layer 6, making the edges of the side trace film layer 6 neat when it is torn off.

[0061] In one embodiment, the first straight line direction is the first direction D1. That is, the arrangement direction of the first fragile structure 41 provided on the plurality of side traces 4 is the same as the arrangement direction of the plurality of side traces 4.

[0062] In one embodiment, see Figure 4 The side trace 4 is provided with a second breakable structure 44 at the second end of the second surface 12. The orthographic projection of the second breakable structure 44 on the substrate 1 is located within the orthographic projection of the second trace 3 on the substrate 1.

[0063] Specifically, the second breakable structure 44 is located within the range of the second trace 3, so that even if the side trace 4 is broken at the second breakable structure 44, the electrical connection between the second trace 3 and the side trace 4 can still be maintained.

[0064] In one embodiment, the first fragile structure 41 and the second fragile structure 44 are identical. The advantage of this arrangement is that using identical structures simplifies the design process, allows for the use of the same processing technology and equipment, and improves production efficiency. For example, in one embodiment, such as... Figure 4 and Figure 6 As shown, the second trace 3 has a third groove 31 on the surface opposite to the substrate 1. The orthographic projection of the side trace 4 on the substrate 1 covers the orthographic projection of the third groove 31 on the substrate 1. The second breakable structure 44 is the structure in which the side trace 4 is located in the third groove 31. During fabrication, after the second trace 3 is formed, a groove is cut into the second trace 3 to form the third groove 31. Then, a protective film 5 is attached to one side of the second surface 12 of the substrate 1. At this time, the orthographic projection of the protective film 5 on the substrate 1 covers part of the orthographic projection of the second trace 3 on the substrate 1, but the third groove 31 is exposed. Then, when the side trace 4 is fabricated, part of the side trace 4 will naturally fill the third groove 31. The side trace 4 filled in the third groove 31 forms the second breakable structure 44. This makes the stress concentrated at the second groove 31 when the protective film 5 is subsequently removed, making the side trace 4 at the second groove 31 easier to break, thereby avoiding the side trace 4 peeling off when the protective film 5 is removed.

[0065] In one embodiment, the display panel 100 is a Micro-LED display panel or a Mini-LED display panel. In one application scenario, the display panel 100 is a Micro-LED display panel, and in another application scenario, the display panel 100 is a Mini-LED display panel.

[0066] This application also protects a display device including a display panel 100 as described in any of the above embodiments. The display device can be used in electronic devices such as televisions, mobile phones, computers, and stage screens. For details regarding the specific structure of the display panel 100, please refer to the above-described related content, which will not be repeated here.

[0067] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A display panel, characterized in that, include: The substrate has a first surface and a second surface facing away from each other; A first trace and a second trace, wherein the first trace is disposed on one side of the first surface of the substrate and the second trace is disposed on one side of the second surface of the substrate, wherein the first trace has a first groove on the surface away from the substrate. A side trace electrically connects the first trace and the second trace, wherein the orthographic projection of the side trace on the substrate at least partially overlaps with the orthographic projection of the first groove on the substrate.

2. The display panel according to claim 1, characterized in that, The number of the first grooves is multiple, and the multiple first grooves are arranged at intervals along a first direction. The first direction intersects with a second direction, and the second direction is the direction from the non-display area to the display area through which the side trace passes. Preferably, the first groove is a through groove or a blind groove; Preferably, the depth of the first groove is greater than 200 nanometers; Preferably, the first groove has a parallelogram or triangle shape in cross-section perpendicular to the substrate; Preferably, the thickness of the first trace ranges from 720 nanometers to 880 nanometers; Preferably, the display panel is a Micro-LED display panel or a Mini-LED display panel.

3. A display component, characterized in that, include: The substrate has a first surface and a second surface facing away from each other; A first trace and a second trace, wherein the first trace is disposed on one side of the first surface of the substrate, and the second trace is disposed on one side of the second surface of the substrate; A protective film is attached to one side of the first surface of the substrate and extends partially to the side of the first trace away from the substrate to cover a portion of the first trace. A side trace electrically connects the first trace and the second trace. The first end of the side trace on the first surface is provided with a first breakable structure. The orthographic projection of the first breakable structure on the substrate is located within the orthographic projection of the first trace on the substrate.

4. The display component according to claim 3, characterized in that, The first trace has a first groove on the surface away from the substrate, and the orthographic projection of the side trace on the substrate covers the orthographic projection of the first groove on the substrate. The first breakable structure is a structure in which the side trace is located in the first groove. Preferably, there are multiple first grooves, and the multiple first grooves are arranged at intervals along a first direction. The first direction intersects with a second direction, and the second direction is the direction from the non-display area to the display area through which the side trace passes. Preferably, the first groove is a through groove or a blind groove; Preferably, the depth of the first groove is greater than 200 nanometers; Preferably, the first groove has a parallelogram or triangle shape in cross-section perpendicular to the substrate; Preferably, the thickness of the first trace ranges from 720 nanometers to 880 nanometers.

5. The display component according to claim 3, characterized in that, The first fragile structure is at least one second groove provided at the first end of the side trace; Preferably, there are multiple second grooves, and the multiple second grooves are arranged at intervals along a first direction, the first direction intersects with a second direction, and the second direction is the direction from the non-display area to the display area through which the side trace passes; Preferably, the second groove is a through groove or a blind groove; Preferably, the surface of the first trace away from the substrate is a plane.

6. The display component according to claim 3, characterized in that, The number of side traces is multiple, and the multiple side traces are arranged at intervals along the first direction; wherein, the first end of each side trace is provided with the first breakable structure; Preferably, the first breakable structures provided with the plurality of side traces are arranged along a first straight line direction; Preferably, the direction of the first straight line is the first direction; Preferably, the second end of the side trace located on the second surface is provided with a second breakable structure, and the orthographic projection of the second breakable structure on the substrate is located within the orthographic projection of the second trace on the substrate; Preferably, the first fragile structure is the same as the second fragile structure; Preferably, the display component is a Micro-LED display component or a Mini-LED display component.

7. A display device, characterized in that, It includes the display panel as described in any one of claims 1 to 2, or the display component as described in any one of claims 3 to 6.

8. A method for manufacturing a display panel, characterized in that, The method includes: A substrate is provided, the substrate having a first surface and a second surface facing away from each other; A first trace is formed on the first surface of the substrate, and a second trace is formed on the second surface of the substrate; A protective film is attached to one side of the first surface of the substrate, wherein the orthographic projection of the protective film on the substrate covers a portion of the orthographic projection of the first trace on the substrate; A side trace is formed to electrically connect the first trace and the second trace, wherein the first end of the side trace located on the first surface is provided with a first breakable structure, and the orthographic projection of the first breakable structure on the substrate is located within the orthographic projection of the first trace on the substrate. Remove the protective film.

9. The method according to claim 8, characterized in that, The step of forming a side trace that electrically connects the first trace and the second trace includes: The side traces are formed with a planar surface facing away from the substrate; The patterned side trace is configured to form at least one second groove at the first end of the side trace, wherein the first breakable structure includes the at least one second groove.

10. The method according to claim 8, characterized in that, The step of forming a first trace on the first surface of the substrate includes: The first trace is formed on the first surface of the substrate; The pattern of the first trace is used to form a first groove on the first trace, wherein the first groove is exposed when the protective film is subsequently applied, and when the side trace is formed, the orthographic projection of the side trace on the substrate covers the orthographic projection of the first groove on the substrate, so that the structure of the side trace located in the first groove is the first fragile structure.

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