CN112289946B - Display panel and manufacturing method thereof - Google Patents
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- CN112289946B CN112289946B CN202011134713.9A CN202011134713A CN112289946B CN 112289946 B CN112289946 B CN 112289946B CN 202011134713 A CN202011134713 A CN 202011134713A CN 112289946 B CN112289946 B CN 112289946B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/81—Anodes
- H10K50/814—Anodes combined with auxiliary electrodes, e.g. ITO layer combined with metal lines
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/82—Cathodes
- H10K50/824—Cathodes combined with auxiliary electrodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/131—Interconnections, e.g. wiring lines or terminals
- H10K59/1315—Interconnections, e.g. wiring lines or terminals comprising structures specially adapted for lowering the resistance
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
Abstract
The application discloses a display panel and a manufacturing method thereof, wherein the method comprises the following steps: preparing an auxiliary electrode on a substrate, preparing a first spacing part on one side of the auxiliary electrode by using an anode layer, forming a first protruding part on the first spacing part by using an organic etching layer, and forming a first retaining wall on the first protruding part by using a pixel defining layer to separate an electrode layer so that a cathode layer is overlapped with the auxiliary electrode; compared with the prior art, the cathode layer resistance is reduced, the phenomenon of voltage drop of the display panel is prevented, and the display uniformity of the display panel is improved.
Description
Technical Field
The application relates to the technical field of display, in particular to a display panel and a manufacturing method thereof.
Background
Organic Light-Emitting Diode (OLED) display panels have display characteristics and quality superior to LCDs, for example: the advantages of lightness, thinness, short response time, low driving voltage, better display color, better display visual angle and the like are widely concerned, and the development of the display device is more and more advanced in recent years, so that the display device not only can be used for manufacturing curved surface display, but also gradually develops towards large size.
At present, jumbo size OLED display panel is bigger because the size is bigger, and the thinner problem that leads to the pressure drop of negative pole is awaited and admirable more and is waited to solve, especially the panel of top emission, very easily produce visual Mura (show the inequality), among the prior art, adopt auxiliary electrode to reduce the resistance of negative pole, and auxiliary electrode's main scheme is the unsettled structure of preparation on the base plate, cooperation organic luminescent material and cathode evaporation plating angle are different, make negative pole and auxiliary electrode overlap joint, however, current unsettled structure preparation technology difficulty, and the shape is unstable, be difficult to keep.
Disclosure of Invention
The embodiment of the application provides a display panel and a manufacturing method thereof, which can solve the technical problem that in the display panel in the prior art, the resistance is large due to the thin cathode and the large area, so that the display panel generates a voltage drop, and the display of the display panel is uneven.
In order to solve the foregoing technical problem, an embodiment of the present application provides a method for manufacturing a display panel, where the method includes:
s10, preparing an auxiliary electrode on the substrate base plate;
s20, preparing an anode layer on the substrate and covering the auxiliary electrode;
s30, preparing an organic etching layer to cover part of the anode layer, and forming a first protruding part and a second protruding part above the two sides of the auxiliary electrode respectively;
s40, removing a portion of the anode layer not covered by the organic etching layer to form an anode and a first spacer on two sides of the auxiliary electrode, respectively, and expose the upper surface of the auxiliary electrode, wherein the first protrusion is located above the first spacer and covers a portion of the auxiliary electrode;
s50, preparing a pixel definition layer on the substrate base plate, wherein the pixel definition layer comprises a first retaining wall on the first bulge;
s60, preparing a functional layer on the pixel defining layer, wherein the functional layer is separated above the auxiliary electrode by the first bulge and is separated into a light-emitting layer overlapped with the anode and a second separating part on the first retaining wall; and
and S70, preparing an electrode layer on the functional layer, wherein the electrode layer is separated above the auxiliary electrode by the first bulge and is divided into a cathode layer overlapped with the light-emitting layer and a third interval part above the second interval part, and the cathode layer extends onto the auxiliary electrode and is overlapped with the auxiliary electrode.
In an embodiment of the application, in step S30, a projection of the first protruding portion on the substrate base plate intersects with a projection of the auxiliary electrode on the substrate base plate.
In an embodiment of the application, in step S30, a projection of the second protruding portion on the substrate base plate intersects with or is separated from a projection of the auxiliary electrode on the substrate base plate.
In an embodiment of the application, in the step S40, a side surface of the first spacing portion is retracted relative to a side surface of the first protrusion portion, so that the first spacing portion exposes a part of an upper surface of the auxiliary electrode and is shielded by the first protrusion portion.
In an embodiment of the application, in the step S40, the second protruding portion is located above the anode, and a side surface of the anode is recessed relative to a side surface of the second protruding portion, so as to isolate the anode from the auxiliary electrode.
In an embodiment of the present application, the step S40 further includes: and removing part of the first protruding part, part of the second protruding part and the organic etching layer except for the first protruding part and the second protruding part.
In an embodiment of the application, in the step S50, the pixel defining layer further includes a second retaining wall formed on the second protrusion, and the second retaining wall continuously covers the second protrusion and a side surface of the anode.
In one embodiment of the present application, in the step S60, the light emitting layer extends onto and overlaps the auxiliary electrode, and in the step S70, the cathode layer covers the light emitting layer and extends onto and overlaps the auxiliary electrode.
In one embodiment of the present application, a material of the organic etching layer is the same as a material of the pixel defining layer.
According to the above object of the present application, there is provided a display panel including:
a substrate base plate;
an auxiliary electrode disposed on the substrate base plate;
an anode layer disposed on the substrate, the anode layer including an anode and a first spacer formed at both sides of the auxiliary electrode, respectively;
the first bulge part and the second bulge part are respectively arranged above two sides of the auxiliary electrode, and the first bulge part is positioned above the first spacing part and shields part of the auxiliary electrode;
the pixel definition layer is arranged on the substrate base plate and comprises a first retaining wall formed on the first protruding part;
the functional layer is arranged on the pixel defining layer and comprises a light emitting layer overlapped with the anode and a second spacing part positioned on the first retaining wall; and
and the electrode layer is arranged on the functional layer and comprises a cathode layer in lap joint with the luminous layer and a third spacing part positioned on the second spacing part, and the cathode layer extends to the auxiliary electrode and is in lap joint with the auxiliary electrode.
The beneficial effect of this application: compared with the prior art, this application covers auxiliary electrode through preparing the anode layer, then through the isotropic of wet etching positive pole in-process, cooperation half tone mask board etches organic etching layer, in order to form first interval portion and first bellying in auxiliary electrode top in order to shelter from partial auxiliary electrode, and cut off the electrode layer in follow-up processing procedure, make cathode layer and auxiliary electrode overlap joint, and then reduced the resistance of cathode layer, prevented that display panel from producing the phenomenon of voltage drop, improved display panel's demonstration homogeneity.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic view of a manufacturing process structure of a display panel according to an embodiment of the present disclosure.
Fig. 2 is a schematic view of a manufacturing process structure of a display panel according to an embodiment of the present disclosure.
Fig. 3 is a schematic view of a manufacturing process structure of a display panel according to an embodiment of the present disclosure.
Fig. 4 is a schematic view of a manufacturing process structure of a display panel according to an embodiment of the present disclosure.
Fig. 5 is a schematic view of a manufacturing process structure of a display panel according to an embodiment of the present disclosure.
Fig. 6 is a schematic view of a manufacturing process structure of a display panel according to an embodiment of the present disclosure.
Fig. 7 is a schematic view of a manufacturing process structure of a display panel according to an embodiment of the present disclosure.
Fig. 8 is a schematic view of a manufacturing process structure of a display panel according to an embodiment of the present disclosure.
Fig. 9 is a flowchart of a method for manufacturing a display panel according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
The embodiment of the application aims at the existing display panel, and the resistance is larger due to the thinner cathode and the larger area, so that the display panel generates voltage drop, and the display panel displays uneven technical problems.
In order to solve the above technical problems, an embodiment of the present invention provides a method for manufacturing a display panel, as shown in fig. 1 to 9, the method including:
s10, preparing the auxiliary electrode 102 on the substrate 101.
S20, preparing an anode layer 103 on the substrate 101 and covering the auxiliary electrode 102.
S30, preparing an organic etching layer 104 to cover a portion of the anode layer 103, and forming a first protrusion 1041 and a second protrusion 1042 on the two sides of the auxiliary electrode 104.
S40, removing a portion of the anode layer 103 not covered by the organic etching layer 104 to form an anode 103b and a first spacer 103a on two sides of the auxiliary electrode 102 respectively, and expose the upper surface of the auxiliary electrode 102, wherein the first protrusion 1041 is located above the first spacer 103a and covers a portion of the auxiliary electrode 102.
S50, preparing a pixel defining layer 105 on the substrate 101, wherein the pixel defining layer 105 includes a first wall 1051 on the first protrusion 1041.
S60, preparing a functional layer 106 on the pixel defining layer 105, wherein the functional layer 106 is separated from the auxiliary electrode 102 by the first protrusion 1041, and is separated into a light emitting layer 1062 overlapping the anode 103b and a second separating portion 1061 on the first wall 1051.
S70, preparing an electrode layer 107 on the functional layer 106, wherein the electrode layer 107 is separated from the auxiliary electrode 102 by the first protrusion 1041, and is separated into a cathode layer 1072 overlapping the light-emitting layer 1062 and a third spacer 1071 above the second spacer 1061, and the cathode layer 1072 extends onto the auxiliary electrode 102 and overlaps the auxiliary electrode 102.
In the implementation and application process, the conventional display panel has a large size, and the problem of voltage drop caused by the thin cathode is more urgent to solve, especially for a top emission panel, which is very easy to generate visible Mura (uneven display), in the conventional process, an auxiliary electrode is used to reduce the resistance of the cathode, and the main scheme of the auxiliary electrode is to fabricate a suspension structure on a substrate, and match an organic light-emitting material and a cathode evaporation angle to be different, so that the cathode and the auxiliary electrode are overlapped, but the conventional suspension structure is difficult to fabricate, and unstable in shape and difficult to maintain, in the embodiment of the present application, an anode layer is prepared to cover the auxiliary electrode, and then an organic etching layer is etched by matching with a halftone mask plate through isotropy in a wet etching anode process, so as to form a first spacer and a first protrusion above the auxiliary electrode to shield part of the auxiliary electrode, and the electrode layer is separated in the subsequent process, so that the cathode layer is connected with the auxiliary electrode in an overlapping manner, the resistance of the cathode layer is further reduced, the phenomenon of voltage drop of the display panel is prevented, and the display uniformity of the display panel is improved.
Specifically, please refer to fig. 1 to 9, a method for manufacturing a display panel according to an embodiment of the present disclosure will be described in detail below, and the method includes:
s10, preparing the auxiliary electrode 102 on the substrate 101.
Providing a substrate 101, and preparing an auxiliary electrode 102 on the substrate 101, wherein the material of the auxiliary electrode 102 includes MoTi or TiAlTi, or other metal resistant to anodic etching solution, which is not limited herein, and the substrate 101 includes a substrate 1011, a transistor 1014 disposed on the substrate 1011, and a spacer layer covering the transistor 1014, and the spacer layer includes a passivation layer 1012, a first insulating layer 1013, a second insulating layer 1015, and a planarization layer 1016 sequentially disposed on the substrate 1011.
And the substrate 101 includes a via through the planarization layer 1016 and a portion of the second insulating layer 1015 to expose the upper surface of the drain in the transistor device 1014.
S20, preparing an anode layer 103 on the substrate 101 and covering the auxiliary electrode 102.
An anode layer 103 is prepared on the substrate 101, and the anode layer covers the auxiliary electrode 102, wherein the anode layer 103 includes a metal layer 1031 and a conducting layer 1032 that are stacked, the metal layer 1031 may be made of silver, the conducting layer 1032 may be made of ITO, and what needs to be mentioned is stability and height of a subsequent suspension structure, so that the metal layer 1031 needs to be made with a sufficient thickness, and in this embodiment, the thickness of the metal layer 1031 is greater than 5000A.
S30, preparing an organic etching layer 104 to cover a portion of the anode layer 103, and forming a first protrusion 1041 and a second protrusion 1042 on the two sides of the auxiliary electrode 104.
An organic etching layer 104 is prepared by using an organic material on the anode layer 103, the organic etching layer 104 covers only a partial region of the anode layer 103, and a first protrusion 1041 and a second protrusion 1042 are respectively formed above two sides of the auxiliary electrode 102, and the anode layer 103 between the first protrusion 1041 and the second protrusion 1042 is not covered by the organic etching layer 104.
It should be noted that the projection of the first protrusion 1041 on the substrate base 101 intersects with the projection of the auxiliary electrode 102 on the substrate base 101, so that the first protrusion 1041 can block the auxiliary electrode 102 after the subsequent etching, in addition, the projection of the second protrusion 1042 on the substrate base 101 intersects with or is separated from the projection of the auxiliary electrode 102 on the substrate base 101, which is not limited herein, and when the projection of the second protrusion 1042 on the substrate base 101 intersects with the projection of the auxiliary electrode 102 on the substrate base 101, the overlapping area is not too large, so as to avoid that the second protrusion 1042 blocks the auxiliary electrode 102 after the subsequent etching, which increases the process difficulty, and the intersecting degree can be selected according to the actual situation, which is not limited herein.
S40, removing a portion of the anode layer 103 not covered by the organic etching layer 104 to form an anode 103b and a first spacer 103a on two sides of the auxiliary electrode 102 respectively, and expose the upper surface of the auxiliary electrode 102, wherein the first protrusion 1041 is located above the first spacer 103a and covers a portion of the auxiliary electrode 102.
Removing a portion of the anode layer 103 not covered by the organic etching layer 104 by wet etching, that is, exposing the upper surface of the auxiliary electrode, and patterning the anode layer 103 to form a first spacer 103a and an anode 103b located at two sides of the auxiliary electrode 102, where the first protrusion 1041 is located above the first spacer 103a and shields a portion of the auxiliary electrode 102, it should be noted that, since it is stated in step S20 that the thickness of the metal layer 1031 is thickened, the height of the first spacer 103a is higher, so that there is a sufficient space between the first protrusion 1041 and the auxiliary electrode 102, which is beneficial to overlapping the cathode layer and the auxiliary electrode 102 in a subsequent process, and greatly reduces the difficulty in manufacturing the display panel.
In addition, the second protrusion 1042 is located above the anode 103b, and due to isotropy of wet etching, the side surface of the first spacer 103a is retracted relative to the side surface of the first protrusion 1041, so that the first spacer 103a exposes a portion of the upper surface of the auxiliary electrode 102 and is shielded by the first protrusion 1041, and the first spacer 103a overlaps the auxiliary electrode 102, and the side surface of the anode 103b is retracted relative to the side surface of the second protrusion 1042, so that the anode 103b is isolated from the auxiliary electrode 102.
And the step S40 further includes: removing a portion of the first protrusion 1041, a portion of the second protrusion 1042, and the organic etching layer 104 outside the first protrusion 1041 and the second protrusion 1042.
S50, preparing a pixel defining layer 105 on the substrate 101, wherein the pixel defining layer 105 includes a first wall 1051 on the first protrusion 1041.
Preparing a pixel defining layer 105 on the substrate 101 by using an organic material, wherein the pixel defining layer 105 includes a first retaining wall 1051 formed on the first protrusion 1041 and a second retaining wall 1052 located on the second protrusion 1042, and during a patterning process of the pixel defining layer 105, the organic material between the first protrusion 1041 and the auxiliary electrode 102 is completely removed according to a design of an exposure region to form a floating structure, and the organic material under the second protrusion 1042 is remained, so that the second retaining wall 1052 continuously covers the second protrusion 1042 and a side surface of the anode 103 b.
It should be noted that, in the embodiment of the present application, the material of the organic etching layer 104 is the same as the material of the pixel defining layer 105, so as to improve the stability of the first protrusion 1041, so that the first protrusion 1041 can more stably maintain the shape, and compared with the prior art, the stability of the suspended structure is improved.
S60, preparing a functional layer 106 on the pixel defining layer 105, wherein the functional layer 106 is separated from the auxiliary electrode 102 by the first protrusion 1041, and is separated into a light emitting layer 1062 overlapping the anode 103b and a second separating portion 1061 on the first wall 1051.
A functional layer 106 is prepared by using an organic light emitting material on the pixel defining layer 105, and the functional layer 106 is separated from the auxiliary electrode 102 by the first protrusion 1041 and separated into a light emitting layer 1062 overlapping the anode 103b and a second separation part 1061 on the first wall 1051, and the light emitting layer 1062 extends to the auxiliary electrode 102 and overlaps the auxiliary electrode 102.
S70, preparing an electrode layer 107 on the functional layer 106, wherein the electrode layer 107 is separated from the auxiliary electrode 102 by the first protrusion 1041, and is separated into a cathode layer 1072 overlapping the light-emitting layer 1062 and a third spacer 1071 above the second spacer 1061, and the cathode layer 1072 extends onto the auxiliary electrode 102 and overlaps the auxiliary electrode 102.
An electrode layer 107 is prepared on the functional layer 106 by using an electrode material, the electrode layer 107 is separated from the auxiliary electrode 102 by the first protrusion 1041, and is separated into a cathode layer 1072 overlapping with the light-emitting layer 1062 and a third spacing portion 1071 located above the second spacing portion 1061, and the cathode layer 1072 extends to the auxiliary electrode 102 and overlaps with the auxiliary electrode 102, that is, the cathode layer 1072 covers the light-emitting layer 1062 and extends to the auxiliary electrode 102 and overlaps with the auxiliary electrode 102.
That is, the first spacer 103a, the first protrusion 1041, the first wall 1051 and the second spacer 1061 together form a suspension structure, such that a portion of the auxiliary electrode 102 is shielded by the suspension structure, so as to isolate the electrode layer 107, and the cathode layer 1072 extends onto the auxiliary electrode 102 and overlaps the auxiliary electrode 102.
In this application embodiment, use the anode layer 103 of thickening as first interval part 103a, with the bed hedgehopping first boss 1041's height has increased promptly first boss 1041 with space between auxiliary electrode 102 is favorable to the cathode layer 1072 to extend to on the auxiliary electrode 102 and with auxiliary electrode 102 overlap joint, just first boss 1041 adopt with the same material of layer 105 is defined to the pixel, has increased its plastic stability to increase the stability of suspended structure, and this application embodiment is through setting up auxiliary electrode 102 in order to reduce the resistance of cathode layer 1072, and then prevented that display panel from producing the voltage drop phenomenon, improved display panel's demonstration homogeneity.
In addition, an embodiment of the present application further provides a display panel manufactured by the manufacturing method of the display panel according to the foregoing embodiment, and please refer to fig. 8, where the display panel includes: a base substrate 101; an auxiliary electrode 102 provided on the substrate base plate 101; an anode layer 103 disposed on the substrate 101, wherein the anode layer 103 includes an anode 103b and a first spacer 103a respectively formed on two sides of the auxiliary electrode 102; a first protrusion 1041 and a second protrusion 1042, which are respectively disposed above two sides of the auxiliary electrode 102, wherein the first protrusion 1041 is located above the first spacer 103a and blocks a portion of the auxiliary electrode 102; a pixel defining layer 105 disposed on the substrate 101, wherein the pixel defining layer 105 includes a first retaining wall 1051 formed on the first protrusion 1041; a functional layer 106 disposed on the pixel defining layer 105, wherein the functional layer 106 includes a light emitting layer 1062 overlapping the anode 103b and a second partition 1061 on the first wall 1051; and an electrode layer 107 disposed on the functional layer 106, wherein the electrode layer 107 includes a cathode layer 1072 overlapping the light emitting layer 1062 and a third spacer 1071 located on the second spacer 1061, and the cathode layer 1072 extends onto the auxiliary electrode 102 and overlaps the auxiliary electrode 102.
And other structures and material compositions of the display panel are the same as those in the above embodiment, and are not repeated herein, and in the embodiment of the application, the auxiliary electrode is covered by the anode layer, and then the organic etching layer is etched by matching with the halftone mask plate through isotropy in the wet etching anode process, so that a first spacing part and a first protruding part are formed above the auxiliary electrode to shield part of the auxiliary electrode, and the electrode layer is separated in the subsequent process, so that the cathode layer is overlapped with the auxiliary electrode, the resistance of the cathode layer is reduced, the phenomenon of voltage drop of the display panel is prevented, and the display uniformity of the display panel is improved.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The display panel and the manufacturing method thereof provided by the embodiment of the present application are described in detail above, and a specific example is applied in the description to explain the principle and the implementation manner of the present application, and the description of the embodiment is only used to help understanding the technical scheme and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (9)
1. A method for manufacturing a display panel, the method comprising:
s10, preparing an auxiliary electrode on the substrate base plate;
s20, preparing an anode layer on the substrate and covering the auxiliary electrode;
s30, preparing an organic etching layer to cover part of the anode layer, and forming a first protruding part and a second protruding part above the two sides of the auxiliary electrode respectively;
s40, removing a portion of the anode layer not covered by the organic etching layer to form an anode and a first spacer on two sides of the auxiliary electrode, respectively, and expose the upper surface of the auxiliary electrode, wherein the first protrusion is located above the first spacer and covers a portion of the auxiliary electrode;
s50, preparing a pixel definition layer on the substrate base plate, wherein the pixel definition layer comprises a first retaining wall on the first bulge;
s60, preparing a functional layer on the pixel defining layer, wherein the functional layer is separated above the auxiliary electrode by the first bulge and is separated into a light-emitting layer overlapped with the anode and a second separating part on the first retaining wall; and
s70, preparing an electrode layer on the functional layer, wherein the electrode layer is separated from the auxiliary electrode by the first protrusion and is divided into a cathode layer overlapping the light-emitting layer and a third spacer above the second spacer, and the cathode layer extends onto the auxiliary electrode and overlaps the auxiliary electrode;
in step S50, the pixel defining layer further includes a second retaining wall formed on the second protrusion, and the second retaining wall continuously covers the second protrusion and the side surface of the anode.
2. The method of manufacturing a display panel according to claim 1, wherein in step S30, a projection of the first projecting portion on the substrate base intersects with a projection of the auxiliary electrode on the substrate base.
3. The method of manufacturing a display panel according to claim 1, wherein in step S30, a projection of the second protruding portion on the substrate base plate intersects with or is separated from a projection of the auxiliary electrode on the substrate base plate.
4. The method of claim 1, wherein in step S40, the side surface of the first spacer is recessed relative to the side surface of the first protrusion, so that the first spacer exposes a portion of the upper surface of the auxiliary electrode and is shielded by the first protrusion.
5. The method for manufacturing a display panel according to claim 1, wherein in the step S40, the second protruding portion is located above the anode, and a side surface of the anode is recessed with respect to a side surface of the second protruding portion, so as to isolate the anode from the auxiliary electrode.
6. The method for manufacturing a display panel according to claim 1, wherein the step S40 further includes: and removing part of the first protruding part, part of the second protruding part and the organic etching layer except for the first protruding part and the second protruding part.
7. The method of claim 1, wherein in step S60, the light-emitting layer extends to and overlaps the auxiliary electrode, and in step S70, the cathode layer covers the light-emitting layer and extends to and overlaps the auxiliary electrode.
8. The method of claim 1, wherein a material of the organic etching layer is the same as a material of the pixel defining layer.
9. A display panel, comprising:
a substrate base plate;
an auxiliary electrode disposed on the substrate base plate;
an anode layer disposed on the substrate, the anode layer including an anode and a first spacer formed at both sides of the auxiliary electrode, respectively;
the first bulge part and the second bulge part are respectively arranged above two sides of the auxiliary electrode, and the first bulge part is positioned above the first spacing part and shields part of the auxiliary electrode;
the pixel definition layer is arranged on the substrate base plate and comprises a first retaining wall formed on the first protruding part;
the functional layer is arranged on the pixel defining layer and comprises a light emitting layer overlapped with the anode and a second spacing part positioned on the first retaining wall; and
the electrode layer is arranged on the functional layer and comprises a cathode layer overlapped with the light emitting layer and a third spacing part positioned on the second spacing part, and the cathode layer extends to the auxiliary electrode and is overlapped with the auxiliary electrode;
the pixel defining layer further includes a second barrier wall formed on the second protrusion, and the second barrier wall continuously covers the second protrusion and the side surface of the anode.
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