CN112186015A - OLED substrate base plate, preparation method thereof and OLED display panel - Google Patents
OLED substrate base plate, preparation method thereof and OLED display panel Download PDFInfo
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- CN112186015A CN112186015A CN202011047979.XA CN202011047979A CN112186015A CN 112186015 A CN112186015 A CN 112186015A CN 202011047979 A CN202011047979 A CN 202011047979A CN 112186015 A CN112186015 A CN 112186015A
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- 239000000758 substrate Substances 0.000 title claims abstract description 64
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 229910052709 silver Inorganic materials 0.000 claims abstract description 20
- 239000004332 silver Substances 0.000 claims abstract description 20
- 230000000903 blocking effect Effects 0.000 claims abstract description 16
- -1 silver ions Chemical class 0.000 claims abstract description 13
- 238000000926 separation method Methods 0.000 claims abstract description 6
- 238000005192 partition Methods 0.000 claims description 39
- 230000005540 biological transmission Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
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- 125000006850 spacer group Chemical group 0.000 claims 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 8
- 238000006479 redox reaction Methods 0.000 abstract description 7
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 137
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 description 40
- 229910001923 silver oxide Inorganic materials 0.000 description 21
- 238000002955 isolation Methods 0.000 description 8
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- 238000013508 migration Methods 0.000 description 5
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- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 description 4
- 239000002346 layers by function Substances 0.000 description 4
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- 230000009286 beneficial effect Effects 0.000 description 3
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- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
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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
- H10K59/124—Insulating layers formed between TFT elements and OLED elements
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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
- H10K50/813—Anodes characterised by their shape
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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
- H10K59/1201—Manufacture or treatment
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Abstract
The invention discloses an OLED substrate base plate, a preparation method thereof and an OLED display panel, relates to the technical field of display, and is used for solving the problem that in the existing OLED display panel, metal silver in an anode layer is subjected to redox reaction in a high-temperature and high-humidity environment to cause short circuit between the anode layer and pins in a Bonding area. The OLED display panel comprises an OLED substrate base plate, pins and OLED elements, wherein the OLED substrate base plate comprises a substrate and a PLN layer, the PLN layer is arranged on the substrate, a Bonding area and a display area are arranged on the PLN layer, the pins are arranged in the Bonding area, and the OLED elements are arranged in the display area; and the PLN layer is provided with a separation belt which is arranged between the pins and the OLED elements and used for blocking silver ions generated in the anode layer of the OLED elements from migrating to the pins.
Description
Technical Field
The invention relates to the technical field of display, in particular to an OLED substrate base plate, a preparation method thereof and an OLED display panel.
Background
The Organic Light-Emitting Diode (OLED) technology has the advantages of self-luminescence, wide viewing angle, almost infinite contrast, low power consumption, and extremely high response speed, and the OLED display panel using the OLED technology is widely used in wearable devices (such as watches and bracelets).
As shown in fig. 1, the OLED display panel generally includes a substrate base plate, where the substrate base plate includes a substrate, a Thin Film Transistor (TFT) and a planarization layer (PLN layer 101), and the TFT on the substrate is covered by the PLN layer 101; a display area and a Bonding area (also called Pad area) are arranged on the PLN layer 101, a plurality of sub-pixels are arranged in the display area, an OLED element is arranged at each sub-pixel, the OLED element comprises an anode layer 102, a cathode layer and an organic material functional layer arranged between the anode layer 102 and the cathode layer, and the anode layer 102 is arranged on the PLN layer 101 and is electrically connected with the corresponding TFT; the Bonding area is provided with PINs 103 (i.e., PIN points) for electrical connection with other components in the device using the OLED display panel.
When the wearing device using the OLED display panel is used for evaluating the environmental reliability, the wearing device needs to be tested in a high-temperature and high-humidity environment, in the high-temperature and high-humidity environment, the metallic silver in the anode layer 102 of the OLED element is easy to undergo an oxidation-reduction reaction, so that silver oxide 104 is generated, the generated silver oxide 104 extends and expands on the PLN layer 101 in a flocculent or branched manner (this process can also be called silver ion migration), and then easily extends to the pin 103 in the Bonding area, so that the anode layer 102 and the pin 103 are short-circuited, and the wearing device is abnormal in display; to avoid short circuit between the anode layer 102 and the leads 103, the anode layer 102 may be far away from the leads 103, but this may cause the frame of the Bonding region to be widened, thereby affecting the structural performance of the product.
Disclosure of Invention
The invention aims to provide an OLED substrate base plate, which is used for solving the problem of short circuit between an anode layer and pins of a Bonding area caused by redox reaction of metallic silver in the anode layer in a high-temperature and high-humidity environment in the conventional OLED display panel; the invention also aims to provide a method for preparing the OLED substrate base plate; the invention also aims to provide an OLED display panel using the OLED substrate base plate.
In order to achieve the purpose, the OLED substrate provided by the invention adopts the following technical scheme:
the OLED substrate base plate includes:
a substrate;
the PLN layer is arranged on the substrate, a Bonding area and a display area are arranged on the PLN layer, the Bonding area is used for setting pins, and the display area is used for setting OLED elements;
and the PLN layer is provided with a separation belt which is arranged between the pins and the OLED elements and used for blocking silver ions generated in the anode layer of the OLED elements from migrating to the pins.
The OLED substrate provided by the invention has the beneficial effects that: silver in an anode layer of an OLED element is subjected to redox reaction in a high-temperature high-humidity environment to generate silver oxide, the silver oxide extends and expands (namely silver ion migration) to a pin in a Bonding area on a PLN layer, and then the pin and the anode layer are short-circuited, and a partition strip is arranged on the PLN layer of the OLED substrate base plate and can block silver ions from migrating to the pin, so that the pin and the anode layer are prevented from being short-circuited.
Further, the isolation strip is an isolation groove formed in the PLN layer. The partition groove is formed in the PLN layer, so that the partition groove is easy to process, and the PLN layer material corresponding to the partition groove is only required to be removed in the processing process, so that waste of excessive materials is avoided.
Further, the groove depth of the partition groove is equal to the thickness of the PLN layer. By the arrangement, the groove is easy to be formed in the PLN layer by adopting the mask design, and the light transmission area on the mask plate is the full transmission area, so that the cost of the mask plate is low; in addition, the amount of silver oxide that can be accommodated by the partition groove per unit length is also increased, and the blocking effect of the partition groove is further improved.
Further, the partition groove has a rectangular cross section taken perpendicular to a plane in which the length thereof extends. With the arrangement, the silver oxide amount which can be contained in the partition groove with unit length is large, and the blocking effect of the partition groove is further improved
Further, the partition belt is arranged in the binding area. By the arrangement, the position of the display area occupied by the partition zone can be avoided, and the area of the display area is further prevented from being reduced.
Further, the material of PLN layer is ya keli.
The OLED display panel provided by the invention adopts the following technical scheme:
the OLED display panel comprises an OLED substrate base plate, pins and OLED elements, wherein the OLED substrate base plate comprises:
a substrate;
the PLN layer is arranged on the substrate, a Bonding area and a display area are arranged on the PLN layer, pins are arranged in the Bonding area, and the OLED element is arranged in the display area;
and the PLN layer is provided with a separation belt which is arranged between the pins and the OLED elements and used for blocking silver ions generated in the anode layer of the OLED elements from migrating to the pins.
The OLED display panel provided by the invention has the beneficial effects that: the metal silver in the anode layer of the OLED element generates oxidation-reduction reaction in a high-temperature and high-humidity environment to generate silver oxide, the silver oxide extends and expands (namely silver ion migration) to the pin in the Bonding area on the PLN layer, and then the pin and the anode layer are short-circuited, and a separation band is arranged on the PLN layer of the OLED substrate in the OLED display panel and can block silver ions from migrating to the pin, so that the pin and the anode layer can be prevented from being short-circuited.
Further, the isolation strip is an isolation groove formed in the PLN layer. The partition groove is formed in the PLN layer, so that the partition groove is easy to process, and the PLN layer material corresponding to the partition groove is only required to be removed in the processing process, so that waste of excessive materials is avoided.
Further, the groove depth of the partition groove is equal to the thickness of the PLN layer. By the arrangement, the groove is easy to be formed in the PLN layer by adopting the mask design, and the light transmission area on the mask plate is the full transmission area, so that the cost of the mask plate is low; in addition, the amount of silver oxide that can be accommodated by the partition groove per unit length is also increased, and the blocking effect of the partition groove is further improved.
Further, the partition groove has a rectangular cross section taken perpendicular to a plane in which the length thereof extends. With the arrangement, the silver oxide can be contained in a large amount in the partition groove with unit length, and the blocking effect of the partition groove is further improved.
Further, the partition belt is arranged in the binding area. By the arrangement, the position of the display area occupied by the partition zone can be avoided, and the area of the display area is further prevented from being reduced.
Further, the material of PLN layer is ya keli.
The preparation method of the OLED substrate provided by the invention adopts the following technical scheme:
the preparation method of the OLED substrate base plate comprises the following steps:
forming a PLN layer on a substrate;
designing a mask plate, wherein a shading area and a light transmission area are arranged on the mask plate;
aligning the mask plate with the PLN layer, and aligning a light transmission area on the mask plate with a position between a pin in a Bonding area on the PLN layer and an OLED element in a display area on the PLN layer;
exposing the PLN layer based on the aligned mask plate;
developing the exposed PLN layer to form a partition groove on the PLN layer;
the partition groove is used for blocking silver ions generated in the anode layer of the OLED element from migrating to the pins.
The preparation method of the OLED substrate provided by the invention has the beneficial effects that: in the OLED substrate prepared by the preparation method, the PLN layer is provided with the isolation groove which can block silver ions generated by the anode layer of the OLED element from migrating to the pins, so that the short circuit between the pins and the anode layer is avoided.
Furthermore, the light-transmitting area on the mask plate is a full-transmission area. By the arrangement, the manufacturing cost of the mask plate can be reduced, the groove depth of the partition groove formed in the PLN layer is larger, the amount of silver oxide which can be contained in the partition groove in unit length is larger, and the blocking effect of the partition groove is further improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram illustrating a prior art OLED display panel with an anode layer shorted to a pin;
FIG. 2 is a schematic diagram of a partition groove for partitioning migration of silver ions in an embodiment of an OLED display panel provided in the present invention;
fig. 3 is a schematic diagram of alignment of a mask plate and a PLN layer in an embodiment of a method for manufacturing an OLED substrate provided by the present invention.
In the drawings: 101-PLN layer, 102-anode layer, 103-pin, 104-silver oxide; 1-PLN layer, 2-anode layer, 3-pin, 4-silver oxide, 5-isolation groove, 6-mask plate, 7-light transmission area, 8-shading area and 9-PLN layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
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, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. They may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The embodiment of the OLED display panel provided by the invention comprises the following steps:
as shown in fig. 2, the OLED display panel includes a substrate base plate, the substrate base plate includes a substrate (not shown), a TFT (not shown) disposed on the substrate, and a PLN layer 1 disposed on the substrate and covering the TFT, in this embodiment, the PLN layer 1 is made of acrylic; the PLN layer 1 is provided with a display area and a Bonding area, the display area is provided with a plurality of sub-pixels, each sub-pixel is provided with an OLED (organic light emitting diode) element, each OLED element comprises an anode layer 2, a cathode layer (not shown in the figure) and an organic material functional layer (not shown in the figure) arranged between the anode layer 2 and the cathode layer, and the anode layer 2 is arranged on the PLN layer 1 and is electrically connected with the TFT; the organic material functional layer may include a light emitting layer, an electron transport layer and a hole transport layer, the electron transport layer is disposed between the cathode layer and the light emitting layer, and the hole transport layer is disposed between the anode layer 2 and the light emitting layer, on the basis, in order to improve efficiency of injecting electrons and holes into the light emitting layer, the organic material functional layer may further include an electron injection layer disposed between the cathode layer and the electron transport layer, and a hole injection layer disposed between the anode layer 2 and the hole transport layer.
As shown in fig. 2, a plurality of pins 3 are arranged at intervals in the Bonding area, and the pins 3 are used for electrically connecting with some components in the device using the OLED display panel.
In this embodiment, the anode layer 2 contains a large amount of metallic silver, in some environments (such as high-temperature and high-humidity environments), the metallic silver can undergo a redox reaction to generate silver oxide 4, the silver oxide 4 extends and expands in a flocculent or branched manner (i.e., silver ion migration) on the PLN layer 1, and a part of the silver oxide 4 can even extend to some pins 3 in the Bonding area, so that the pins 3 and the anode layer 2 are shorted, and the OLED display panel is abnormal due to the shorted pins 3 and the anode layer 2, so that a device using the OLED display panel cannot be normally used.
In order to avoid the short circuit between the anode layer 2 and the leads 3 in the Bonding region, as shown in fig. 2, a separating groove 5 is disposed on the PLN layer 1, the separating groove 5 is disposed at a position of the Bonding region close to the display region and extends along a boundary line of the Bonding region, so as to separate each lead 3 in the Bonding region from each OLED element close to the Bonding region, and thus, after the silver metal in the anode layer 2 undergoes redox reaction to generate silver oxide 4, the silver oxide 4 falls into the separating groove 5 in the process of extending and expanding towards the Bonding region, and cannot extend to each lead 3 in the Bonding region, thereby avoiding the short circuit between the lead 3 and the anode layer 2. The blocking grooves 5 constitute a blocking strip on the PLN layer 1.
As shown in fig. 2, in order to enlarge the amount of silver oxide 4 that can be accommodated by the partition grooves 5 per unit length, the depth of the partition grooves 5 in the present embodiment is set equal to the thickness of the PLN layer 1. The cross-section that the face intercepting of its length extending direction of perpendicular to was separated off slot 5 in this embodiment is the rectangle, sets up like this and not only can reduce the fluting degree of difficulty that separates off slot 5, makes the volume that separates the slot 5 that unit length can hold silver oxide 4 more moreover.
The embodiment of the preparation method of the OLED substrate provided by the invention comprises the following steps:
in this embodiment, a method for manufacturing an OLED substrate is described with reference to fig. 3, and the OLED substrate used for an OLED display panel in a wristwatch is taken as an object.
The preparation method of the OLED substrate base plate comprises the following steps:
1) the substrate is selected, the shape of the substrate is circular, the material of the substrate is not limited, and the substrate can be organic glass, resin, quartz, metal and the like.
2) A TFT and a PLN layer 9 covering the TFT are formed on a substrate, the PLN layer 9 is made of acrylic, and the PLN layer 9 has the same shape and size as the substrate and is also circular.
3) Designing a mask plate 6, wherein the mask plate 6 in the embodiment is square, and the side length of the mask plate 6 is larger than the diameter of the PLN layer 9; the mask 6 has a light-transmitting region 7 and a light-shielding region 8, the light-transmitting region 7 is a long groove (the light-transmitting region 7 is only shown as a line in fig. 3 because the length-width ratio of the long groove is large) provided in the mask 6 and penetrating in the thickness direction of the mask 6, and the direction of the long groove is the same as the direction of the boundary line between the Bonding region and the display region on the PLN layer 9.
4) The mask 6 is aligned with the PLN layer 9 and the transmissive region 7 is aligned with a position on the Bonding region near the display region.
5) Exposing the PLN layer 9 based on the aligned mask 6, wherein light can penetrate through the light-transmitting area 7 to irradiate the corresponding part on the PLN layer 9, the light cannot irradiate the part, corresponding to the light-shielding area 8, on the PLN layer 9, the property of the part irradiated by the light on the PLN layer 9 can be changed, and the property of the rest part cannot be changed.
6) Developing the exposed PLN layer 9, and removing the part of the PLN layer 9 irradiated by light by a developing solution, thereby forming a separating groove on the PLN layer 9 and at the position of the Bonding area close to the display area, reasonably setting the exposure time and the light intensity of the PLN layer 9, ensuring that the depth of the separating groove is equal to the thickness of the PLN layer 9, ensuring that the moving direction of the separating groove is the same as the moving direction of the boundary line of the Bonding area and the display area on the PLN layer 9, reasonably setting the length of the light-transmitting area 7 on the mask plate 6, ensuring that the two ends of the separating groove in the length direction are closed, further ensuring that the PLN layer 9 is continuous at the two ends of the separating groove, and ensuring that the length of the light-transmitting area 7 also ensures that the finally formed separating groove on the PLN layer 9 can block silver ions generated in the anode layers of all OLED elements on the OLED display panel from migrating to pins.
Exposure and development through a mask plate are common in the processing process of a display panel, and are not repeated here for the mature prior art.
In the embodiment of the preparation method of the OLED substrate base plate, the trend of the light-transmitting area is the same as the trend of the boundary line of the Bonding area and the display area on the PLN layer. In other embodiments, the direction of the light-transmitting region may be different from the direction of the boundary line between the Bonding region and the display region on the PLN layer, as long as it is ensured that the partition groove finally formed on the PLN layer can block silver ions generated in the anode layer of the OLED element on the OLED display panel from migrating to the pins.
In the embodiment of the preparation method of the OLED substrate, the light-transmitting area is a long groove which is arranged on the mask plate and penetrates through the mask plate in the thickness direction, so that the light-transmitting area is a full-transmission area. In other embodiments, the light-transmissive region may be a semi-transmissive region, so that the groove depth of the isolation groove formed on the PLN layer may be smaller than the thickness of the PLN layer, and the same can be used.
In the above embodiment of the OLED display panel, the blocking strip is a blocking groove disposed on the PLN layer. In other embodiments, the partition strip may also be a strip-shaped protrusion disposed on the PLN layer, the strip-shaped protrusion may also block extension of the silver oxide when extending to the pin, when the PLN layer is prepared, a mask plate may be designed, the mask plate has a shading area and a light transmission area, the shape of the shading area is adapted to the strip-shaped protrusion, the light transmission area is a semi-transmission area, when the PLN layer is exposed, the mask plate is aligned with the PLN layer, and the shading area is aligned to a position where the strip-shaped protrusion is to be disposed, the PLN layer is developed after light irradiation, a portion of the PLN layer corresponding to the light transmission area may be removed by the developing solution to a certain thickness, and a portion of the PLN layer corresponding to the shading area may not be removed by the developing solution, so that the strip-shaped protrusion is formed on.
In the above embodiment of the OLED display panel, the groove depth of the isolation groove is equal to the thickness of the PLN layer. In other embodiments, the depth of the partition groove may be less than the thickness of the PLN layer, and the same may be used.
In the above embodiment of the OLED display panel, a cross section of the partition groove taken perpendicular to a surface thereof in a length extending direction is rectangular. In other embodiments, the cross section of the partition groove taken by a plane perpendicular to the longitudinal extension direction thereof may have other shapes, such as a trapezoid or other shapes with an open upper side, and may be used.
In the above embodiment of the OLED display panel, the partition groove is disposed in the Bonding area. In other embodiments, the blocking groove may be disposed in the display region as long as it can block silver ions generated in the anode layer from migrating to the leads in the Bonding region.
The invention also provides an OLED substrate, and the structure of the OLED substrate is the same as that of the substrate in the embodiment of the OLED display panel, and the description is omitted here.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. An OLED substrate base plate comprising:
a substrate;
the PLN layer is arranged on the substrate, a Bonding area and a display area are arranged on the PLN layer, the Bonding area is used for arranging pins, and the display area is used for arranging OLED elements;
it is characterized in that the preparation method is characterized in that,
and the PLN layer is provided with a separation belt which is arranged between the pin and the OLED element and is used for blocking silver ions generated in the anode layer of the OLED element from migrating to the pin.
2. The OLED substrate base plate of claim 1, wherein the spacer strip is a spacer groove disposed on the PLN layer.
3. The OLED substrate board of claim 2, wherein the spacer grooves have a groove depth equal to a thickness of the PLN layer.
4. The OLED substrate base plate of claim 2 or 3, wherein the cross section of the partition groove taken by a plane perpendicular to the lengthwise extending direction thereof is rectangular.
5. The OLED substrate base plate of claim 1, 2 or 3, wherein the spacer tape is disposed in the Bonding region.
6. The OLED substrate base plate of claim 1, 2 or 3, wherein the PLN layer is acrylic.
7. An OLED display panel, comprising:
the OLED substrate panel of any one of claims 1-6;
the pin is arranged in a Bonding area of the PLN layer;
and the OLED element is arranged in the display area of the PLN layer.
8. A preparation method of an OLED substrate base plate is characterized by comprising the following steps:
forming a PLN layer on a substrate;
designing a mask plate, wherein a shading area and a light transmission area are arranged on the mask plate;
aligning the mask to the PLN layer and the light transmissive region on the mask to a position between a pin in a Bonding region on the PLN layer and an OLED element in a display region on the PLN layer;
exposing the PLN layer based on the aligned mask plate;
developing the exposed PLN layer to form a separation groove on the PLN layer;
the partition groove is used for blocking silver ions generated in the anode layer of the OLED element from migrating to the pins.
9. The method for preparing the OLED substrate according to claim 8, wherein the light-transmitting region on the mask plate is a full-transmission region.
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| CN202011047979.XA CN112186015B (en) | 2020-09-29 | 2020-09-29 | OLED substrate and preparation method thereof, and OLED display panel |
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| CN202011047979.XA CN112186015B (en) | 2020-09-29 | 2020-09-29 | OLED substrate and preparation method thereof, and OLED display panel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115020620A (en) * | 2022-07-11 | 2022-09-06 | Tcl华星光电技术有限公司 | Array substrate and display panel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070035239A1 (en) * | 2005-08-11 | 2007-02-15 | Samsung Sdi Co., Ltd. | Flat panel display and method of manufacturing the same |
| US20110198572A1 (en) * | 2010-02-12 | 2011-08-18 | Samsung Mobile Display Co., Ltd. | Organic light emitting diode display and method for manufacturing the same |
-
2020
- 2020-09-29 CN CN202011047979.XA patent/CN112186015B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070035239A1 (en) * | 2005-08-11 | 2007-02-15 | Samsung Sdi Co., Ltd. | Flat panel display and method of manufacturing the same |
| US20110198572A1 (en) * | 2010-02-12 | 2011-08-18 | Samsung Mobile Display Co., Ltd. | Organic light emitting diode display and method for manufacturing the same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115020620A (en) * | 2022-07-11 | 2022-09-06 | Tcl华星光电技术有限公司 | Array substrate and display panel |
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| CN112186015B (en) | 2024-07-02 |
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