Conductive unit preparation method, touch panel preparation method and touch panel

Abstract

The invention discloses a conductive unit preparation method, a touch panel preparation method and a touch panel, the conductive unit preparation method comprises forming a touch function area and a non-touch area on a base film, the non-touch area is located on one side of the touch function area, the touch function area is provided with a plurality of transparent electrodes arranged at intervals, and the non-touch area is located on the other side of the touch function area. The non-touch area is provided with a plurality of first extending parts which are arranged at intervals, each first extending part corresponds to one transparent electrode, a conductive lead is arranged between each first extending part and the corresponding transparent electrode for connection, and the plurality of conductive leads are arranged at intervals; one end, far away from the conductive lead, of each first extension part is provided with at least one discharge part, two adjacent first extension parts are provided with two discharge parts which are oppositely arranged, and the discharge parts are used for performing electrostatic discharge when the protective film is torn off from the base film. Static electricity generated when the protective film is torn off from the base film can be released, the transparent electrode is prevented from being damaged by electrostatic discharge, and therefore the conductive circuit layer is prevented from being damaged by the electrostatic discharge.

Description

Technical Field

[0001] The present invention relates to the technical field of touch devices, and in particular to a method for preparing a conductive unit, a method for preparing a touch panel, and a touch panel. Background Art

[0002] Capacitive touch screen technology uses the human body's current induction to determine the location of the touch point. It has been widely used in various electronic product fields, such as mobile terminals, home appliances, and medical equipment.

[0003] In order to control thickness and maintain the advantage of impact resistance, existing capacitive touch panels generally use a film structure as a transparent circuit layer, that is, a conductive film such as an indium tin oxide film, a nanosilver film, a metal mesh copper film, a silver paste mesh film, etc. is used to prepare the conductive circuit layer. However, the conductive film used in capacitive touch panels is relatively thin, and a protective film needs to be used for coating protection in order to avoid damage during the manufacturing process.

[0004] During the manufacturing process of the capacitive touch panel, a large amount of charge will accumulate in the conductive circuit layer, which will cause the conductive circuit layer to release the charge during the process of tearing off the protective film, thereby generating static electricity and causing damage to the conductive circuit layer. Summary of the invention

[0005] The embodiments of the present invention provide a method for preparing a conductive unit, a method for preparing a touch panel, and a touch panel, aiming to improve the technical problem in the prior art that the protective film of the conductive circuit layer is torn off during the manufacturing process of the touch panel, thereby causing static electricity to damage the conductive circuit layer.

[0006] An embodiment of the present invention provides a method for preparing a conductive unit, and the method for preparing a conductive unit includes:

[0007] Providing a base film, the base film comprising a transparent conductive film and a protective film covering a surface of the transparent conductive film;

[0008] The base film is patterned to form a touch function area and a non-touch area, wherein the non-touch area is located on one side of the touch function area, the touch function area has a plurality of spaced transparent electrodes, the non-touch area has a plurality of spaced first extensions, each of the first extensions corresponds to a transparent electrode, a conductive lead is arranged between each of the first extensions and the corresponding transparent electrode, and the plurality of conductive leads are spaced apart;

[0009] Each of the first extension parts has at least one discharge part at one end away from the conductive lead, and two adjacent first extension parts have two discharge parts arranged opposite to each other, and the discharge parts are used to release static electricity when the base film tears off the protective film.

[0010] In an embodiment of the present invention, the distance between the ends of two discharge portions disposed opposite to each other is smaller than the distance between two adjacent conductive leads, so that the distance between the ends of two discharge portions disposed opposite to each other is smaller than the distance between two adjacent conductive leads.

[0011] In some embodiments of the present invention, a distance between two adjacent conductive leads is smaller than a distance between two adjacent transparent electrodes.

[0012] In some embodiments of the present invention, the width of the discharge portion gradually decreases along a first direction, where the first direction is a direction from an end of the discharge portion connected to the first extension portion toward an end of the discharge portion away from the first extension portion.

[0013] In some embodiments of the present invention, the discharge portion is in a pointed cone shape.

[0014] In some embodiments of the present invention, the width of the first extension portion is smaller than the width of the conductive lead.

[0015] In some embodiments of the present invention, the conductive unit preparation method includes:

[0016] Patterning the protective film and the transparent conductive film in sequence to form a touch function area and a non-touch area;

[0017] forming a plurality of the transparent electrodes arranged at intervals on the transparent conductive film;

[0018] On the transparent conductive film, a conductive lead is formed at the end of each transparent electrode, and an end of the conductive lead away from the transparent electrode is arranged in the non-touch area, and a plurality of conductive leads are spaced apart from each other;

[0019] On the transparent conductive film, forming the first extension portion at one end of each of the conductive leads away from the transparent electrode;

[0020] On the transparent conductive film, at least one discharge portion is formed at one end of each first extension portion away from the conductive lead, and two adjacent first extension portions have two discharge portions arranged opposite to each other, and the discharge portions are configured to release static electricity when the protective film is torn off the base film.

[0021] In some embodiments of the present invention, the conductive unit preparation method further includes:

[0022] The discharge part is brought into contact with an external charge-drawing object, and the protective film on the transparent conductive film is torn off;

[0023] After the protective film is torn off, the first extension portion is cut off.

[0024] In one embodiment of the present invention, a method for preparing a touch panel is also provided, comprising at least:

[0025] Providing a sensing circuit layer, which is prepared by the above-mentioned conductive unit preparation method;

[0026] Providing a driving circuit layer, which is prepared by the above-mentioned conductive unit preparation method;

[0027] The sensing circuit layer is attached to one side of the driving circuit layer.

[0028] In one embodiment of the present invention, a touch panel is further provided, comprising a sensing circuit layer and a driving circuit layer obtained by the above-mentioned method for preparing a touch panel.

[0029] The embodiment of the present invention provides a method for preparing a conductive unit, a method for preparing a touch panel, and a touch panel. The conductive unit preparation method forms a touch function area and a non-touch area on a base film, so that the non-touch function area has a first extension part and a discharge part, and the discharge part is used to discharge static electricity when the base film is torn off the protective film. That is, by providing the discharge part, the static electricity generated when the base film is torn off the protective film is discharged, so as to avoid the static electricity discharge from damaging the transparent electrode, thereby preventing the conductive circuit layer from being damaged by the static electricity discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0031] Figure 1 A schematic structural diagram of a conductive unit according to an embodiment of the present invention;

[0032] Figure 2 It is a schematic structural diagram of a conductive unit after cutting off the first extension portion according to an embodiment of the present invention;

[0033] Figure 3 It is a structural schematic diagram of a first extension portion and a discharge portion according to an embodiment of the present invention;

[0034] Figure 4 This is a schematic structural diagram of discharge parts arranged opposite to each other in one embodiment of the present invention;

[0035] Figure 5 A schematic diagram of the structure of a base film according to an embodiment of the present invention;

[0036] Figure 6The figure is a schematic structural diagram of a touch panel according to an embodiment of the present invention.

[0037] Figure numerals: 10, transparent conductive film; 11, protective film; 12, base film; 20, transparent electrode; 30, conductive lead; 40, first extension portion; 50, discharge portion; 100, sensing circuit layer; 200, driving circuit layer; 300, protective layer; 400, substrate layer. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be understood that the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In the present application, the word "exemplary" is used to mean "used as an example, illustration or description". Any embodiment described as "exemplary" in the present application is not necessarily interpreted as being more preferred or more advantageous than other embodiments. In order to enable any person skilled in the art to implement and use the present invention, the following description is given. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present invention can be implemented without using these specific details. In other examples, well-known structures and processes will not be elaborated in detail to avoid unnecessary details that make the description of the present invention obscure. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the widest range of principles and features disclosed in the present application.

[0040] like Figure 1-Figure 6 As shown, the present invention provides a method for preparing a conductive unit, the conductive unit is used to be bonded with other units to form a touch panel, and the conductive unit preparation method includes:

[0041] Providing a base film, wherein the base film includes a transparent conductive film 10 and a protective film 11 covering the surface of the transparent conductive film 10;

[0042] The base film 12 is patterned to form a touch function area and a non-touch function area. The non-touch area is located on one side of the touch function area. The touch function area has a plurality of spaced transparent electrodes 20. The non-touch area has a plurality of spaced first extensions 40. Each first extension 40 corresponds to a transparent electrode 20. A conductive lead 30 is set between each first extension 40 and its corresponding transparent electrode 20, and the plurality of conductive leads 30 are spaced apart.

[0043] Each first extension portion 40 has at least one discharge portion 50 at one end away from the conductive lead 30 , and two adjacent first extension portions 40 have two discharge portions 50 disposed opposite to each other, and the discharge portions 50 are used to discharge static electricity when the base film 12 tears off the protective film 11 .

[0044] It should be noted that two adjacent first extension portions 40 have two discharge portions 50 arranged opposite to each other, that is, two adjacent first extension portions 40 respectively have a first discharge portion 50 and a second discharge portion 50 , the first discharge portion 50 is arranged toward the second discharge portion 50 , and the second discharge portion 50 is arranged toward the first discharge portion 50 .

[0045] One end of the conductive lead 30 is located in the touch function area and connected to the transparent electrode 20 , and the other end of the conductive lead 30 is located in the non-touch area and connected to the first extension portion 40 .

[0046] It can be understood that the non-touch function area has the first extension portion 40 and the discharge portion 50, and the discharge portion 50 is used to discharge static electricity when the base film 12 tears off the protective film 11. That is, by providing the discharge portion 50, the static electricity generated when the base film 12 tears off the protective film 11 is released to prevent the static electricity discharge from damaging the transparent electrode 20, thereby preventing the conductive circuit layer from being damaged by the static electricity discharge.

[0047] Generally, the plurality of transparent electrodes 20 are arranged at intervals along a direction, and the plurality of transparent electrodes 20 are arranged at equal intervals.

[0048] Generally, the plurality of first extension portions 40 are also arranged in a spaced arrangement along a direction. And the plurality of first extension portions 40 are arranged at equal intervals. If a first extension portion 40 has only one other first extension portion 40 adjacent thereto, then the first extension portion 40 has only one discharge portion 50. If a first extension portion 40 has two other first extension portions 40 adjacent thereto, then the first extension portion 40 has two discharge portions 50.

[0049] In some embodiments, the discharge portion 50 is generally disposed near an edge of the base film 12 .

[0050] In some embodiments, the conductive unit preparation method includes making the spacing between the ends of two discharge portions 50 disposed opposite to each other smaller than the spacing between two adjacent conductive leads 30 .

[0051] That is, the distance between the ends of the discharge portions 50 disposed opposite to each other is made the minimum distance between adjacent structures on the entire base film 12. Since the charge will be released preferentially at the position with a smaller circuit distance during the process of the base film 12 tearing off the protective film 11, therefore, by setting the ends of the two discharge portions 50 disposed opposite to each other to the minimum distance between the circuit structures on the entire base film 12, the charge on the base film 12 is electrostatically discharged at the discharge portions 50 during the process of the base film 12 tearing off, thereby avoiding electrostatic discharge in the touch function area, protecting the transparent electrode 20, and avoiding electrostatic discharge from damaging the conductive circuit layer during the film tearing off.

[0052] In some embodiments, when the ends of two discharge portions 50 facing each other are arranged to form the minimum spacing of the circuit structure on the entire base film 12 , the spacing between two adjacent conductive leads 30 is smaller than the spacing between two adjacent transparent electrodes 20 .

[0053] It can be understood that, further, the spacing between adjacent conductive leads 30 is smaller than the spacing between adjacent transparent electrodes 20 , so that the charges accumulated on the transparent electrodes 20 can be preferentially transferred to the conductive leads 30 , and then preferentially transferred to the discharge portion 50 .

[0054] In some embodiments, the minimum spacing between two adjacent transparent electrodes 20 is 0.5 mm to 1.5 mm, the spacing between two adjacent conductive leads 30 is 30 um to 50 um, and the spacing between the ends of two discharging portions 50 disposed opposite to each other is 1 um to 20 um.

[0055] That is, the distance between the ends of adjacent discharge parts 50 is much smaller than the distance between other lines, thereby ensuring that static electricity discharge occurs preferentially in the discharge parts 50 .

[0056] In some embodiments, the distance between two adjacent transparent electrodes 20 is 6 cm.

[0057] In some embodiments, the distance between two adjacent transparent electrodes 20 is 8 cm.

[0058] In some embodiments, the distance between two adjacent transparent electrodes 20 is 9 cm.

[0059] In some embodiments, the distance between two adjacent conductive leads 30 is 30 um.

[0060] In some embodiments, the distance between two adjacent conductive leads 30 is 40 um.

[0061] In some embodiments, the distance between two adjacent conductive leads 30 is 50 um.

[0062] In some embodiments, the distance between the ends of two discharging portions 50 disposed opposite to each other is 1 um.

[0063] In some embodiments, the distance between the ends of two discharging portions 50 disposed opposite to each other is 10 um.

[0064] In some embodiments, the distance between the ends of two discharging portions 50 disposed opposite to each other is 20 um.

[0065] In some embodiments, the width of the discharge portion 50 gradually decreases along a first direction, where the first direction is a direction from an end of the discharge portion 50 connected to the first extension portion 40 toward an end of the discharge portion 50 away from the first extension portion 40 .

[0066] It can be understood that the width of the discharge portion 50 is gradually reduced along the first direction, that is, the surface area of ​​the discharge portion 50 is gradually reduced along the first direction, so that the surface charge density is increased.

[0067] According to the tip effect, on the same charged conductor, compared with the smooth part, the surface charge density at the tip is larger, the electric field strength near the tip is stronger, and it is easy to discharge from the tip to the surrounding air or the adjacent grounding body. Under the strong electric field at the tip of the charged conductor, the remaining ions in the air near it move violently and collide violently with the air molecules, ionizing the air molecules and generating a large number of positive and negative ions; these ions collide with other air molecules under the action of the electric field and ionize them, and the cycle continues, thus forming a tip discharge.

[0068] That is, by gradually reducing the width of the discharge portion 50 along the first direction, a tip effect is formed in the discharge portion 50, so that when the base film 12 tears off the protective film 11, discharge is preferentially performed in the discharge portion 50, and discharge is avoided at the transparent electrode 20, thereby protecting the conductive circuit layer.

[0069] In some embodiments, the discharge portion 50 is in a pointed cone shape.

[0070] It can be understood that by making the discharge portion 50 into a pointed cone shape, the tip discharge effect is utilized so that the base film 12 is discharged before the discharge portion 50 when the protective film is torn off.

[0071] In some embodiments, the width of the first extension 40 is smaller than the width of the conductive lead 30 .

[0072] It is understandable that the width of the first extension portion 40 is smaller than the width of the conductive lead 30, so that the first extension portion 40 is a pointed structure relative to the conductive lead 30, so that the first extension portion 40 is easier to discharge relative to the conductive lead 30, thereby protecting the conductive lead 30.

[0073] In some embodiments, the width of the discharge portion 50 gradually decreases along a first direction, where the first direction is a direction from one end of the discharge portion 50 connected to the first extension portion 40 toward one end of the discharge portion 50 away from the first extension portion 40, and at the same time, the width of the end of the discharge portion 50 connected to the first extension portion 40 is the same as the width of the first extension portion 40.

[0074] That is, the discharge portion 50 also has a discharge tip effect relative to the first extension portion 40 , so that the discharge portion 50 is more likely to discharge, thereby further protecting the first extension portion 40 and further protecting the transparent electrode 20 .

[0075] In some embodiments, the maximum width of the transparent electrode 20 is 6 mm to 9 mm.

[0076] In some embodiments, the width of the conductive lead 30 is 50 um-100 um.

[0077] In some embodiments, the width of the transparent electrode 20 is any one of 5 um, 1 mm, and 2 cm.

[0078] In some embodiments, the width of the conductive lead 30 is any one of 50 um, 80 um, and 100 um.

[0079] In some embodiments, the conductive unit preparation method includes:

[0080] S100, patterning the protective film 11 and the transparent conductive film 10 in sequence to form a touch function area and a non-touch area;

[0081] S200, forming a plurality of transparent electrodes 20 arranged at intervals on the transparent conductive film 10.

[0082] That is, a patterning process is performed on one surface of the transparent conductive film 10 by laser etching, so that a plurality of transparent electrodes 20 arranged at intervals are directly obtained.

[0083] S300, on the transparent conductive film 10, a conductive lead 30 is formed at the end of each transparent electrode 20, and one end of the conductive lead 30 away from the transparent electrode 20 is arranged on one side of the touch function area, and multiple conductive leads 30 are spaced apart from each other.

[0084] That is, on the same side surface of the transparent conductive film 10 where the transparent electrode 20 is formed, the conductive leads 30 are formed by patterning by laser etching, and one end of each conductive lead 30 away from the transparent electrode 20 is located on the same outer side of the touch function area.

[0085] S500 , forming a first extension portion 40 on the transparent conductive film 10 at an end of each conductive lead 30 away from the transparent electrode 20 .

[0086] That is, the transparent conductive film 10 is continuously patterned by laser etching to form the first extension portion 40 at the end of the conductive lead 30 away from the transparent electrode 20 .

[0087] S700, on the transparent conductive film 10, at least one discharge portion 50 is formed at one end of each first extension portion 40 away from the conductive lead 30, and two adjacent first extension portions 40 have two discharge portions 50 arranged opposite to each other, and the discharge portions 50 are configured to discharge static electricity when the base film 12 tears off the protective film 11.

[0088] Similarly, the discharge portion 50 is formed at the end of the first extension portion 40 away from the conductive lead 30 by laser etching, and two adjacent first extension portions 40 have the discharge portions 50 facing each other.

[0089] In some embodiments, the conductive unit preparation method further includes:

[0090] S800A, the discharge portion 50 is brought into contact with an external charge-drawing object, and the protective film 11 on the transparent conductive film 10 is torn off.

[0091] That is, by contacting the discharge part 50 with an external charge-drawing object and then tearing off the protective film 11, the charges accumulated on the base film 12 are released through the discharge part 50 by contacting the charge-drawing object, thereby protecting the transparent electrode 20 and the touch function area.

[0092] S900 , after tearing off the protective film 11 , cutting off the first extension portion 40 .

[0093] In some embodiments, in step S500, when forming the first extension portion 40, the first extension portion 40 is placed close to the edge of the base film 12, so that the discharge portion 50 can be placed close to the edge of the base film 12, so that when releasing static electricity through contact, the discharge portion 50 can easily contact a charged object, such as a charged platform and the ground.

[0094] In some embodiments, the conductive unit preparation method further includes:

[0095] S700, at least one discharge portion 50 is formed at one end of each first extension portion 40 away from the conductive lead 30, and two adjacent first extension portions 40 have two discharge portions 50 arranged opposite to each other, so that the distance between the ends of the two discharge portions 50 arranged opposite to each other is smaller than the distance between two adjacent conductive leads 30, and the distance between the ends of the two discharge portions 50 arranged opposite to each other is smaller than the distance between two adjacent conductive leads 30.

[0096] That is, by setting the ends of the two discharge portions 50 arranged opposite to each other to the minimum spacing of the circuit structure on the entire transparent conductive film 10, the base film 12 can discharge the charges on the transparent conductive film 10 at the discharge portion 50 during the film tearing process, thereby avoiding electrostatic discharge in the touch function area, thereby protecting the transparent electrode 20 and avoiding electrostatic discharge from damaging the conductive circuit layer during film tearing.

[0097] S800B, tear off the protective film 11 on the transparent conductive film 10.

[0098] That is, by directly utilizing the pitch arrangement of the discharge section 50 , static electricity is directly discharged by the discharge section 50 , thereby protecting the transparent electrode 20 .

[0099] S900 , after tearing off the protective film 11 , cutting off the first extension portion 40 .

[0100] In some embodiments, the present invention further provides a method for preparing a touch panel, comprising at least:

[0101] Providing a sensing circuit layer 100, which is prepared by the above-mentioned conductive unit preparation method;

[0102] Providing a driving circuit layer 200, which is prepared by the above-mentioned conductive unit preparation method;

[0103] The sensing circuit layer 100 is attached to one side of the driving circuit layer 200 .

[0104] It should be noted that the protective film 11 on the transparent conductive films 10 of the sensing circuit layer 100 and the driving circuit layer 200 needs to be torn off before the sensing circuit layer 100 and the driving circuit layer 200 are attached to each other.

[0105] Since the method for preparing the touch panel adopts the sensing circuit layer 100 and the driving circuit layer prepared by the above-mentioned conductive unit preparation method, it has at least some or all of the beneficial effects of the above-mentioned embodiments, which will not be described one by one here.

[0106] In some embodiments, the method for preparing the touch panel further includes:

[0107] S10, providing a substrate;

[0108] S20, providing a driving circuit layer 200, which is prepared by the above-mentioned conductive unit preparation method, and disposing the driving circuit layer 200 on a substrate;

[0109] S30, providing a sensing circuit layer 100, which is prepared by the above-mentioned conductive unit preparation method, and laminating the sensing circuit layer 100 on the driving circuit layer 200;

[0110] S40 , providing a protection layer 300 , and disposing the protection layer 300 on the sensing circuit layer 100 .

[0111] In some examples, the present invention further provides a touch panel, comprising a sensing circuit layer 100 and a driving circuit layer 200 prepared by the above touch panel preparation method.

[0112] Since the touch panel has the sensing circuit layer 100 and the driving circuit layer 200 obtained by the above touch panel preparation method, it has at least some or all of the beneficial effects of the above touch panel, which will not be described in detail here.

[0113] In some embodiments, the touch panel includes a substrate layer 400 , a driving circuit layer 200 disposed on the substrate layer 400 , a sensing circuit layer 100 disposed on the driving circuit layer 200 , and a protection layer 300 disposed on the sensing circuit layer 100 .

[0114] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, within the application concept of the present invention are included in the patent protection scope of the present invention.

Claims

1. A method for preparing a conductive unit, characterized in that: The conductive unit preparation method comprises: Providing a base film, the base film comprising a transparent conductive film and a protective film covering a surface of the transparent conductive film; The base film is patterned to form a touch function area and a non-touch area, wherein the non-touch area is located on one side of the touch function area, the touch function area has a plurality of spaced transparent electrodes, the non-touch area has a plurality of spaced first extensions, each of the first extensions corresponds to a transparent electrode, a conductive lead is arranged between each of the first extensions and the corresponding transparent electrode, and the plurality of conductive leads are spaced apart; Each of the first extension parts has at least one discharge part at one end away from the conductive lead, and two adjacent first extension parts have two discharge parts arranged opposite to each other, and the discharge parts are used to release static electricity when the base film tears off the protective film.

2. The method for preparing a conductive unit according to claim 1, characterized in that: The distance between the ends of the two discharge portions disposed opposite to each other is smaller than the distance between the two adjacent conductive leads, so that the distance between the ends of the two discharge portions disposed opposite to each other is smaller than the distance between the two adjacent conductive leads.

3. The method for preparing a conductive unit according to claim 2, characterized in that: The distance between two adjacent conductive leads is smaller than the distance between two adjacent transparent electrodes.

4. The method for preparing a conductive unit according to claim 2, characterized in that: The width of the discharge portion gradually decreases along a first direction, where the first direction is a direction from an end of the discharge portion connected to the first extension portion toward an end of the discharge portion away from the first extension portion.

5. The method for preparing a conductive unit according to claim 4, characterized in that: The discharge portion is in a pointed cone shape.

6. The method for preparing a conductive unit according to claim 1, characterized in that: The width of the first extension portion is smaller than the width of the conductive lead.

7. The method for preparing a conductive unit according to claim 1, characterized in that: The conductive unit preparation method comprises: Patterning the protective film and the transparent conductive film in sequence to form a touch function area and a non-touch area; forming a plurality of the transparent electrodes arranged at intervals on the transparent conductive film; On the transparent conductive film, a conductive lead is formed at the end of each transparent electrode, and an end of the conductive lead away from the transparent electrode is arranged in the non-touch area, and a plurality of conductive leads are spaced apart from each other; On the transparent conductive film, forming the first extension portion at one end of each of the conductive leads away from the transparent electrode; At least one discharge portion is formed at one end of each first extension portion away from the conductive lead, and two adjacent first extension portions have two discharge portions disposed opposite to each other, and the discharge portions are configured to discharge static electricity when the base film tears off the protective film.

8. The method for preparing a conductive unit according to claim 7, characterized in that: The conductive unit preparation method further comprises: The discharge part is brought into contact with an external charge-drawing object, and the protective film on the transparent conductive film is torn off; After the protective film is torn off, the first extension portion is cut off.

9. A method for preparing a touch panel, characterized in that: At least: Providing a sensing circuit layer, which is prepared by the conductive unit preparation method according to any one of claims 1 to 8; Providing a driving circuit layer, which is prepared by the conductive unit preparation method according to any one of claims 1 to 8; The sensing circuit layer is attached to one side of the driving circuit layer.

10. A touch panel, characterized in that: It comprises a sensing circuit layer and a driving circuit layer obtained by the method for preparing a touch panel according to claim 9.

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