Preparation method of display panel and display panel

Abstract

The invention provides a preparation method of a display panel and the display panel. The preparation method of the display panel comprises the following steps: uniformly smearing a protective layer on a grid printing surface of a cover plate; wherein the grid printing surface of the cover plate is close to the thin film transistor layer of the display panel and deviates from the touch layer; placing the cover plate on a touch layer preparation platform deck, wherein the protective layer is close to the touch layer preparation platform deck; preparing a touch control layer on a surface opposite to the grid printing surface of the cover plate, generating friction between the protective layer and a touch control layer preparation platform deck to generate scratches, and adhering impurity particles; and taking out the cover plate from the touch layer preparation stage, and removing the protective layer by using a protective layer solution to eliminate scratches and impurity particles. The protective layer is arranged on the face, away from the touch control layer, of the cover plate to make contact with the touch control layer preparation carrier, scratches generated in the touch control layer preparation process of the cover plate are reduced, due to the fact that the impurity particles adhere to the protective layer, the impurity particles can be removed when the protective layer is cleaned, and the product yield is increased.

Description

Technical Field

[0001] The present invention relates to the field of display panel preparation, and in particular to a display panel preparation method and a display panel. Background Art

[0002] In recent years, touch panels have been widely used in smartphones, tablets, laptops, interactive displays, automation equipment, and other electronic products. Manufacturers are increasingly focusing on providing customizable touch solutions to meet the needs of different application scenarios and strive to enhance the user interaction experience.

[0003] During the current touch panel manufacturing process, a cover plate is placed on a touch layer preparation stage, where the touch layer is then fabricated through multiple array steps. During this process, the cover plate rubs against the touch layer preparation stage, causing scratches and the adhesion of foreign particles, which affects product yield.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Summary of the Invention

[0005] In view of this, the present invention provides a method for preparing a display panel and a display panel, wherein a protective layer is provided on the side of the cover plate facing away from the touch layer to contact the touch layer preparation platform, thereby reducing scratches on the cover plate during the touch layer preparation process. Furthermore, since foreign particles adhere to the protective layer, the foreign particles can be removed at the same time when the protective layer is cleaned, thereby avoiding damage to the cover plate when cleaning the foreign particles and improving the product yield.

[0006] One aspect of the present invention provides a method for manufacturing a display panel, comprising the following steps:

[0007] Evenly apply a protective layer on the grid-printed surface of the cover plate; wherein the grid-printed surface of the cover plate is close to the thin film transistor layer of the display panel and away from the touch layer;

[0008] Placing the cover plate on a touch layer preparation stage, with the protective layer close to the touch layer preparation stage;

[0009] The touch layer is prepared on the surface of the cover plate opposite to the grid-printed surface, and the protective layer and the touch layer preparation stage rub against each other to generate scratches and adhere foreign particles; and

[0010] The cover plate is taken out from the touch layer preparation stage, and the protective layer is removed using a protective layer solution to eliminate the scratches and foreign particles.

[0011] In some embodiments, the impurity particles have a diameter ranging from 10 to 30 micrometers, and the impurity particles include at least aluminum oxide particles.

[0012] In some embodiments, the touch layer includes: a metal layer, an insulating layer, an indium tin oxide layer, and a passivation layer, which are sequentially arranged from a side of the cover plate close to the touch layer.

[0013] In some embodiments, the metal layer, the insulating layer, and the passivation layer are prepared by dry etching of an aluminum electrode, and the aluminum oxide particles are generated by the aluminum electrode during the dry etching of the aluminum electrode and adhere to the protective layer.

[0014] In some embodiments, the contact surface between the touch layer preparation platform and the protective layer has an array of protrusions to increase the friction between the touch layer and the cover plate when the metal layer, the insulating layer, the indium tin oxide layer and the passivation layer are aligned with the cover plate during the preparation process, and to generate the scratches on the protective layer.

[0015] In some embodiments, the protective layer has a thickness of at least 30 micrometers, and the protective layer is an organic photoresist, wherein the material of the organic photoresist is at least one or a combination of the following: photoresist, polyimide, acrylic resin, and epoxy resin.

[0016] In some embodiments, the protective layer solution is an organic photoresist solution, and the material of the organic photoresist solution is at least one or more of the following combinations: acetone, ether, methanol, and isopropyl alcohol.

[0017] In some embodiments, after removing the cover plate from the touch layer preparation stage and removing the protective layer using a protective layer solution to eliminate the scratches and foreign particles, the following steps are further included:

[0018] A packaging glue is applied to the grid-printed surface of the cover plate to package the display panel.

[0019] In some embodiments, the impurity particles further include molybdenum metal particles and environmental foreign matter particles.

[0020] Another aspect of the present invention further provides a display panel, which is manufactured using the above-mentioned method for manufacturing a display panel.

[0021] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are incorporated into and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and it is clear that those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0023] Figure 1 A schematic diagram showing a process of a method for manufacturing a display panel according to the present invention;

[0024] Figure 2 A schematic diagram showing the structure of the cover plate of the present invention after applying a protective layer;

[0025] Figure 3 A schematic diagram showing the structure of the cover plate of the present invention when a touch layer is prepared after a protective layer is applied;

[0026] Figure 4 A schematic diagram showing the structure of the cover plate of the present invention after the touch layer is prepared;

[0027] Figure 5 A schematic diagram showing the structure of the cover plate of the present invention after cleaning the protective layer;

[0028] Figure 6 A schematic structural diagram of a display panel of the present invention is shown.

[0029] Reference numerals:

[0030] 1 Cover

[0031] 11 Grid printing surface

[0032] 12 Grid opposite to printed surface

[0033] 2 protective layer

[0034] 3 Touch layer

[0035] 4. Touch layer preparation stage

[0036] 5. Foreign particles

[0037] 6 scratches

[0038] 7 Display Panel DETAILED DESCRIPTION

[0039] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Identical reference numerals in the figures represent identical or similar structures, and thus a repeated description thereof will be omitted.

[0040] The terms "first," "second," and similar terms used in the specific description do not denote any order, quantity, or importance, but are simply used to distinguish different components. Furthermore, in the description of the present invention, the terms "upper," "lower," and similar terms indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. These terms are used solely for ease of description and do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0041] It should be noted that, in the absence of conflict, the embodiments of the present invention and features in different embodiments may be combined with each other.

[0042] The inventors of this case have conducted careful and in-depth research and have provided a solution to the problems existing in the prior art. The present invention provides a method for preparing a display panel and a display panel, wherein the method for preparing a display panel includes the following steps: uniformly applying a protective layer on the grid-printed surface of a cover plate; wherein the grid-printed surface of the cover plate is close to the thin-film transistor layer of the display panel and away from the touch layer; placing the cover plate on a touch layer preparation platform, with the protective layer close to the touch layer preparation platform; preparing a touch layer on the opposite side of the grid-printed surface of the cover plate, wherein the protective layer and the touch layer preparation platform rub against each other to produce scratches and adhere to foreign particles; removing the cover plate from the touch layer preparation platform, and removing the protective layer using a protective layer solution to eliminate scratches and foreign particles. The method for preparing a display panel and the display panel of the present invention, by providing a protective layer on the side of the cover plate away from the touch layer to contact the touch layer preparation platform, reduces scratches on the cover plate during the touch layer preparation process, and since foreign particles adhere to the protective layer, the foreign particles can be removed together when the protective layer is cleaned, thereby avoiding damage to the cover plate when cleaning the foreign particles and improving the product yield.

[0043] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0044] Figure 1 A schematic diagram showing a process of a method for manufacturing a display panel according to the present invention; Figure 2 A schematic diagram showing the structure of the cover plate of the present invention after applying a protective layer; Figure 3 A schematic diagram showing the structure of the cover plate of the present invention when a touch layer is prepared after a protective layer is applied; Figure 4A schematic diagram showing the structure of the cover plate of the present invention after the touch layer is prepared; Figure 5 A schematic structural diagram of the cover plate of the present invention after cleaning the protective layer is shown.

[0045] refer to Figures 1 to 5 One aspect of the present invention discloses a method for preparing a display panel, comprising the following steps:

[0046] S110 , evenly apply the protective layer 2 on the grid-printed surface 11 of the cover plate 1 , wherein the grid-printed surface 11 of the cover plate 1 is close to the thin film transistor layer of the display panel and away from the touch layer 3 .

[0047] S120 , placing the cover plate 1 on the touch layer preparation stage 4 , with the protection layer 2 close to the touch layer preparation stage 4 .

[0048] S130, a touch layer 3 is prepared on the surface 12 of the cover plate 1 opposite to the grid printing surface, and the protective layer 2 and the touch layer preparation carrier 4 rub against each other to produce scratches 6 and foreign particles 5 are adhered.

[0049] S140 , taking out the cover plate 1 from the touch layer preparation stage 4 , and removing the protective layer 2 using a protective layer solution to eliminate scratches 6 and foreign particles 5 .

[0050] It is worth noting that S110 to S140 are merely step numbers, intended to facilitate subsequent reference and avoid duplication, and are not intended to limit the order in which the steps of this method are performed. In other embodiments, the above steps of this method may be written in an alternate order, and the method is not limited thereto. Subsequent step numbers in the present invention all have the same meaning, and any duplication will not be repeated.

[0051] For the above-mentioned step S110, a protective layer 2 is evenly applied to the grid printing surface 11 of the cover plate 1. The grid printing surface 11 of the cover plate 1 is close to the thin film transistor layer of the display panel and away from the touch layer 3. The thickness of the protective layer 2 is at least 30 microns to match the diameter of the foreign particles 5, so as to avoid the protective layer 2 being too thin, causing the foreign particles 5 to adhere to the cover plate 1, or scratch the cover plate 1. The thickness of the protective layer 2 should not be too large to facilitate application and cleaning. The protective layer 2 can be an organic photoresist, and the material of the organic photoresist can be a combination of one or more of the following: photoresist, polyimide, acrylic resin and epoxy resin, but is not limited thereto. Photoresist is one of the most common organic photoresist materials. It can undergo chemical changes according to the degree of exposure to ultraviolet light, forming soluble or insoluble areas. Photoresist can be divided into three types: positive, negative, and double exposure, and the specific selection depends on the process requirements. Polyimide (PI) is usually used in high temperature environments and has good thermal stability and chemical stability. It can be used as an organic photoresist to protect the surface of the cover plate 1. Acrylic resin is a common type of organic photoresist material with excellent optical and chemical properties and is widely used in photolithography processes. Epoxy resin can also be used as an organic photoresist material. When selecting an organic photoresist material, it is necessary to consider its optical properties, chemical stability, thermal stability, and compatibility with other process steps. Different application scenarios may require different types of organic photoresist materials.

[0052] In step S120 above, the cover plate 1 is placed on the touch layer preparation stage 4, with the protective layer 2 positioned adjacent to the touch layer preparation stage 4. Specifically, the surface 12 of the cover plate 1 opposite to the mesh-printed surface faces upward, while the mesh-printed surface 11 faces downward. In preparation for the next step, the touch layer 3 will be formed on the surface 12 opposite to the mesh-printed surface of the cover plate 1.

[0053] In step S130, a touch layer 3 is formed on the surface 12 of the cover plate 1 opposite the mesh-printed surface. The protective layer 2 rubs against the touch layer preparation stage 4, producing scratches 6 and adhering foreign particles 5. The foreign particles 5 typically have a diameter ranging from 10 to 30 microns. Particles 5 with larger diameters generally do not adhere to the protective layer 2. The foreign particles 5 include at least aluminum oxide particles.

[0054] Existing touch panels include: resistive, surface acoustic wave, infrared and capacitive. Among them, capacitive touch panels include two types: self-capacitance and mutual capacitance. The mutual capacitance touch panel detects the capacitance between two cross-sensing blocks (the two sensing blocks constitute the two poles of the capacitor, the excitation electrode Tx and the receiving electrode Rx respectively), and then obtains the capacitance of all horizontal and vertical click intersections, and calculates the coordinates based on the capacitance change data of the touch screen. The following is an example of a structure of a mutual capacitance touch panel. In other embodiments, the touch layer 3 can be of other structures, and the present invention is not limited here.

[0055] In some embodiments, the touch layer 3 includes: a metal layer, an insulating layer, an indium tin oxide layer, and a passivation layer, sequentially arranged from the side of the cover plate 1 closest to the touch layer 3. The metal layer, insulating layer, and passivation layer are formed by dry etching of an aluminum electrode. Aluminum oxide particles are generated by the aluminum electrode during the dry etching process and adhere to the protective layer 2. The presence of the protective layer 2 prevents foreign particles 5 from directly adhering to the cover plate 1, thereby preventing damage to the cover plate 1 during subsequent cleaning of the foreign particles 5, thereby improving product yield.

[0056] In some embodiments, the impurity particles 5 also include, but are not limited to, molybdenum metal particles and environmental foreign matter particles. Because the metal layer of the touch layer 3 can be made of molybdenum metal, molybdenum metal particles are generated during the preparation of the metal layer and adhere to the protective layer 2. Furthermore, environmental foreign matter particles in the preparation environment may also adhere to the protective layer 2.

[0057] In some embodiments, the contact surface between the touch layer preparation platform 4 and the protective layer 2 has an array of protrusions to increase the friction between the cover plate 1 and the cover plate 1 when the metal layer, the insulating layer, the indium tin oxide layer and the passivation layer are aligned with the cover plate 1 during the preparation process, and to produce scratches 6 on the protective layer 2. Specifically, the preparation of each film layer of the touch layer 3 involves alignment operations or process jitters, both of which will cause friction between the protective layer 2 and the touch layer preparation platform 4, and form scratches 6. In the preparation process of the touch layer 3, the alignment operation is a key step to ensure that each film layer is accurately positioned relative to the cover plate 1. Due to the presence of the protective layer 2, the alignment friction between the cover plate 1 and the touch layer preparation platform 4 is avoided when the various film layers of the touch layer 3 are prepared, thereby avoiding scratches on the cover plate 1 and improving the product yield.

[0058] In step S140 above, the cover plate 1 is removed from the touch layer preparation stage 4, and a protective layer solution is used to remove the protective layer 2 to eliminate scratches 6 and foreign particles 5. The protective layer solution is an organic photoresist solution. The organic photoresist solution is made of at least one or a combination of the following: acetone, ether, methanol, and isopropanol, but is not limited thereto. The organic photoresist solution only needs to be able to remove the protective layer 2, and the specific solution can be selected based on the material of the protective layer 2.

[0059] In some embodiments, after step S140 , the method for preparing the display panel further includes the following steps: S150 , applying packaging glue to the grid printing surface 11 of the cover plate 1 to encapsulate the display panel and complete the assembly of the touch layer 3 , but the present invention is not limited thereto.

[0060] The method for preparing a display panel of the present invention reduces scratches 6 generated on the cover plate 1 during the preparation of the touch layer 3 by providing a protective layer 2 on the side of the cover plate 1 facing away from the touch layer 3 so as to contact the touch layer preparation platform 4. Furthermore, since foreign particles 5 adhere to the protective layer 2, the foreign particles 5 can be removed together when the protective layer 2 is cleaned, thereby avoiding damage to the cover plate 1 when cleaning the foreign particles 5 and improving the product yield.

[0061] Figure 6 FIG. 1 is a schematic diagram showing the structure of a display panel of the present invention. Figure 6 Based on the same inventive concept, another embodiment of the present invention further provides a display panel 7, which is prepared using the above-mentioned display panel preparation method and can achieve the same technical effects. The repeated parts will not be repeated.

[0062] In summary, the display panel preparation method and display panel of the present invention reduce scratches on the cover plate during the touch layer preparation process by setting a protective layer on the side of the cover plate facing away from the touch layer to contact the touch layer preparation carrier. In addition, since foreign particles adhere to the protective layer, the foreign particles can be removed when cleaning the protective layer, avoiding damage to the cover plate when cleaning the foreign particles, thereby improving the product yield.

[0063] The above is a further detailed description of the present invention in conjunction with specific optional embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A method for preparing a display panel, characterized in that: The following steps are involved: A protective layer (2) is evenly applied to the grid-printed surface (11) of the cover plate (1); wherein the grid-printed surface (11) of the cover plate (1) is close to the thin-film transistor layer of the display panel and faces away from the touch layer (3); Placing the cover plate (1) on a touch layer preparation platform (4), with the protective layer (2) close to the touch layer preparation platform (4); The touch layer (3) is prepared on the opposite surface (12) of the grid printing surface of the cover plate (1), and the protective layer (2) and the touch layer preparation carrier (4) rub against each other to generate scratches (6) and adhere foreign particles (5); and The cover plate (1) is taken out from the touch layer preparation platform (4), and the protective layer (2) is removed using a protective layer solution to eliminate the scratches (6) and the foreign particles (5).

2. The method for manufacturing a display panel according to claim 1, wherein: The diameter of the impurity particles (5) ranges from 10 to 30 microns, and the impurity particles (5) at least include aluminum oxide particles.

3. The method for manufacturing a display panel according to claim 2, wherein: The touch layer (3) comprises: a metal layer, an insulating layer, an indium tin oxide layer, and a passivation layer, which are sequentially arranged on a side of the cover plate (1) close to the touch layer (3).

4. The method for manufacturing a display panel according to claim 3, wherein: The metal layer, the insulating layer and the passivation layer are prepared by dry etching of an aluminum electrode. The aluminum oxide particles are generated by the aluminum electrode during the dry etching of the aluminum electrode and adhere to the protective layer (2).

5. The method for manufacturing a display panel according to claim 3, wherein: The contact surface between the touch layer preparation platform (4) and the protective layer (2) has protrusions arranged in an array, so as to increase the friction between the platform and the cover plate (1) when the platform is aligned with the cover plate (1) during the preparation process of the metal layer, the insulating layer, the indium tin oxide layer and the passivation layer, and to generate the scratches (6) on the protective layer (2).

6. The method for manufacturing a display panel according to claim 2, wherein: The thickness of the protective layer (2) is at least 30 micrometers. The protective layer (2) is an organic photoresist, and the material of the organic photoresist is at least one or a combination of the following: photoresist, polyimide, acrylic resin and epoxy resin.

7. The method for manufacturing a display panel according to claim 6, wherein: The protective layer solution is an organic photoresist solution, and the material of the organic photoresist solution is at least one or more of the following combinations: acetone, ether, methanol, and isopropyl alcohol.

8. The method for manufacturing a display panel according to claim 1, wherein: After removing the cover plate (1) from the touch layer preparation stage (4), and removing the protective layer (2) using a protective layer solution to eliminate the scratches (6) and the foreign particles (5), the method further includes the following steps: Packaging glue is applied to the grid printed surface (11) of the cover plate (1) to package the display panel.

9. The method for manufacturing a display panel according to claim 2, wherein: The impurity particles (5) also include molybdenum metal particles and environmental foreign matter particles.

10. A display panel, characterized in that: The display panel is manufactured by the method for manufacturing the display panel according to any one of claims 1 to 9.

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