WO2024040706A1 - 阵列基板及其制备方法 - Google Patents
阵列基板及其制备方法 Download PDFInfo
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- WO2024040706A1 WO2024040706A1 PCT/CN2022/124521 CN2022124521W WO2024040706A1 WO 2024040706 A1 WO2024040706 A1 WO 2024040706A1 CN 2022124521 W CN2022124521 W CN 2022124521W WO 2024040706 A1 WO2024040706 A1 WO 2024040706A1
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- H—ELECTRICITY
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- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
- H10D86/451—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs characterised by the compositions or shapes of the interlayer dielectrics
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- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
- H10D86/60—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs wherein the TFTs are in active matrices
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- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/01—Manufacture or treatment
- H10D86/021—Manufacture or treatment of multiple TFTs
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/01—Manufacture or treatment
- H10D86/021—Manufacture or treatment of multiple TFTs
- H10D86/0221—Manufacture or treatment of multiple TFTs comprising manufacture, treatment or patterning of TFT semiconductor bodies
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- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
- H10D86/441—Interconnections, e.g. scanning lines
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- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
- H10D86/481—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs integrated with passive devices, e.g. auxiliary capacitors
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- 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
Definitions
- the present application relates to the field of display, and in particular to an array substrate and a preparation method thereof.
- the display panel includes an array substrate.
- the array substrate includes a substrate and multiple metal layers disposed on the substrate. Different metal layers include different signal lines, such as gate lines, scan lines, capacitor plates, etc. This results in the array substrate
- the preparation is extremely complex and requires multiple patterning of metal material layers to form various signal lines, which makes it difficult to guarantee the yield of the array substrate.
- Embodiments of the present application provide an array substrate and a preparation method thereof, aiming to improve the yield of the array substrate.
- An embodiment of the first aspect of the present application provides an array substrate, including: a substrate; a first metal layer located on one side of the substrate, the first metal layer including a first capacitor plate; a first insulating layer located on the first The side of the metal layer facing away from the substrate, the first insulating layer includes at least two layers, the first insulating layer includes a first groove and a first via hole, the first groove is recessed from the surface of the first insulating layer facing away from the first metal layer Formed, the first via hole is disposed through the first insulating layer, the orthographic projection of the first groove on the substrate at least partially overlaps the orthographic projection of the first capacitor plate on the substrate, and the first via hole is on the substrate The orthographic projection and the orthographic projection of the first capacitor plate on the substrate are dislocated; the second metal layer is located on the side of the first insulating layer away from the first metal layer, and the second metal layer includes a second capacitor plate, at least Part of the second capacitor plate is located in the first groove.
- An embodiment of the second aspect of the present application also provides a method for preparing an array substrate, including:
- a substrate to be etched includes a substrate, a first metal layer and a first insulating layer to be etched sequentially on one side of the substrate.
- the first metal layer includes a first capacitor plate, and a first
- the insulating layer to be etched has a first groove area and a first via hole area, and the orthographic projection of the first capacitor plate on the substrate at least partially overlaps with the orthographic projection of the first groove area on the substrate;
- a photoresist layer is arranged on the surface of the first insulating layer to be etched away from the first metal layer, and the photoresist layer is patterned to form a first etching groove and a second etching groove.
- the first etching groove is located at The first groove area is formed by a depression on the surface of the photoresist layer facing away from the first insulating layer to be etched, and the second etching groove is located in the first via area and is provided through the photoresist layer;
- the substrate to be etched with the photoresist layer is subjected to a second etching process to form an array substrate including a first insulating layer.
- the first insulating layer includes a first groove located in the first groove area and a first groove located in the first pass.
- the first via hole and the first groove in the hole area are formed by a depression on the surface of the first insulating layer facing away from the first metal layer, and the first via hole is provided through the first insulating layer.
- the array substrate includes a substrate and a first metal layer, a first insulating layer and a second metal layer provided on the substrate.
- the first metal layer includes a first capacitor plate, and a second metal layer.
- the metal layer includes a second capacitor plate, and the first capacitor plate and the second capacitor plate can form a capacitor.
- a first groove is opened on the first insulating layer between the first metal layer and the second metal layer.
- the second capacitor plate is located in the first groove.
- the second capacitor plate can be adjusted by adjusting the size of the first groove. The overlapping area of the plate and the first capacitor plate, and then adjusting the size of the capacitor, can improve the preparation accuracy of the array substrate, thereby improving the yield of the array substrate.
- Figure 1 is a cross-sectional view of an array substrate provided by an embodiment of the present application.
- Figure 2 is a cross-sectional view of an array substrate provided by another embodiment of the present application.
- Figure 3 is a cross-sectional view of an array substrate provided by another embodiment of the present application.
- Figure 4 is a cross-sectional view of an array substrate provided by yet another embodiment of the present application.
- Figure 5 is a cross-sectional view of an array substrate provided by yet another embodiment of the present application.
- Figure 6 is a cross-sectional view of an array substrate provided by yet another embodiment of the present application.
- Figure 7 is a cross-sectional view of an array substrate provided by yet another embodiment of the present application.
- Figure 8 is a schematic flow chart of a method for preparing an array substrate provided by an embodiment of the present application.
- 9 to 21 are schematic process diagrams of a method for manufacturing a display panel provided by embodiments of the present application.
- Embodiments of the present application provide an array substrate that can be used for a display panel.
- the display panel can be an organic light emitting diode (OLED) display panel.
- OLED organic light emitting diode
- the first embodiment of the present application provides an array substrate.
- the array substrate includes a substrate 01 , a first metal layer 02 , a first insulating layer 03 and a second metal layer 04 .
- the first metal layer 02 is located on one side of the substrate 01
- the first metal layer 02 includes a first capacitor plate 210 .
- the first insulating layer 03 is located on the side of the first metal layer 02 facing away from the substrate 01 .
- the first insulating layer 03 includes a first groove 310 and a first via hole 320 .
- the first groove 310 is formed by the first insulating layer 03 and faces away from the substrate 01 .
- the surface of a metal layer 02 is recessed, the first via hole 320 is provided through the first insulating layer 03 , the orthographic projection of the first groove 310 on the substrate 01 is the same as the orthographic projection of the first capacitor plate 210 on the substrate 01 At least partially overlapping, the orthographic projection of the first via hole 320 on the substrate 01 and the orthographic projection of the first capacitor plate 210 on the substrate 01 are misaligned; the second metal layer 04 is located on the first insulating layer 03 away from the first On one side of the metal layer 02 , the second metal layer 04 includes a second capacitor plate 410 , and at least part of the second capacitor plate 410 is located in the first groove 310 .
- the array substrate includes a substrate 01 and a first metal layer 02, a first insulating layer 03 and a second metal layer 04 provided on the substrate 01.
- the first metal layer 02 includes a first
- the capacitor plate 210 and the second metal layer 04 include a second capacitor plate 410, and a capacitance can be formed between the first capacitor plate 210 and the second capacitor plate 410.
- a first groove 310 is opened on the first insulating layer 03 between the first metal layer 02 and the second metal layer 04 .
- the second capacitor plate 410 is located in the first groove 310 .
- the size can adjust the overlapping area of the second capacitor plate 410 and the first capacitor plate 210, thereby adjusting the size of the capacitor, which can improve the preparation accuracy of the array substrate, thereby improving the yield of the array substrate.
- the substrate 01 can be made of glass, polyimide (PI) or other light-transmitting materials.
- the array substrate 100 may include a stacked semiconductor layer, a first metal layer 02 , a second metal layer 04 and a third metal layer arranged on one side of the substrate 01 . Insulating layers are provided between adjacent metal layers.
- the pixel driving circuit provided on the array substrate includes a transistor and a storage capacitor C.
- a transistor includes a semiconductor, gate, source and drain.
- the storage capacitor C includes a first capacitor plate 210 and a second capacitor plate 410 .
- the gate electrode and the first capacitor plate 210 may be located on the first metal layer 02
- the second capacitor plate 410 may be located on the second metal layer 04
- the source electrode and the drain electrode may be located on the third metal layer.
- the first insulating layer 03 includes at least two layers.
- the first insulating layer 03 at least includes a first film layer 03a and a second film layer 03b located between the first film layer 03a facing the first metal layer 02, the first groove 310 is disposed through the first film layer 03a or through part of the first film layer 03a.
- the first via hole 320 includes a first section that penetrates the first film layer 03a and a second section that penetrates at least part of the second film layer 03b.
- the first insulation layer 03 includes a first film layer 03a and a second film layer 03b
- the first groove 310 is provided in the first film layer 03a
- the first via hole 320 penetrates the first film layer 03a. 03a and the second film layer 03b.
- the first via hole 320 can be prepared in sections. For example, the first section through the first film layer 03a can be prepared first, and then the first groove 310 can be prepared.
- a second segment penetrating the second film layer 03b is prepared at the position penetrating the first segment of the first film layer 03a to form the first via hole 320, which can simplify the preparation process of the array substrate and improve the ordering. Preparing the first via hole 320 and the first groove 310 leads to problems such as complicated preparation process and low preparation efficiency.
- the array substrate also includes signal lines 420.
- the signal lines 420 include, for example, data lines, scanning lines, power lines, voltage reference lines, and connection lines connecting pixel electrodes and driving circuits. These signal lines 420 can pass through the first via hole. 320 overlap.
- the first via hole 320 is provided with a connection portion 05 on one side facing the substrate 01 , and the signal line 420 passes through the first via hole 320 and connects to the connection portion 05 .
- the connection portion 05 may be located on the first metal layer 02 or the semiconductor layer.
- the array substrate includes a connection portion 05 located on a side of the first insulating layer 03 facing away from the second metal layer 04.
- the orthographic projection of the first via hole 320 on the substrate 01 and The orthographic projection of the connection part 05 on the substrate 01 at least partially overlaps.
- the second metal layer 04 also includes a signal line 420 , and at least part of the signal line 420 is electrically connected to the connection part 05 through the first via hole 320 .
- the signal line 420 may include segments located on both sides of the first via hole 320 , and the two segments are connected to each other through the connection portion 05 , that is, the signal line 420 may include segments on the plane where the second metal layer 04 is located. Two parts are provided on both sides of the first via hole 320 , and the two parts are connected to each other through the connection part 05 , which can improve the yield of the signal line 420 .
- connection portion 05 is provided on the first metal layer 02 , and the etching formation time of the second section of the first via hole 320 is consistent with the first groove 310 The etching formation time is the same.
- the connection portion 05 is located in the first metal layer 02, after etching the second section of the first via hole 320, the connection portion 05 can be exposed through the first via hole 320, so that the signal line 420 can be exposed through the first via hole 320.
- the via hole 320 and the connection part 05 are connected to each other.
- the etching formation time of the second segment of the first via hole 320 is the same as the etching formation time of the first groove 310 , which means that the etching formation time of the second segment of the first via hole 320 is under the same etching parameters.
- the time is the same as the etching formation time of the first groove 310 .
- the first groove 310 can penetrate the first film layer 03a.
- the bottom wall surface of the first groove 310 can be the second film layer. the surface facing away from the substrate.
- the thickness and material of the first film layer 03a and the second film layer 03b are the same, so under the same etching parameters, the etching formation time of the second segment of the first via hole 320 is the same as that of the second film layer 03b.
- the etching formation time of a groove 310 is the same.
- the thickness and material of the first film layer 03a and the second film layer 03b are different, and the first film layer 03a and the second film layer 03b satisfy the following formula (1):
- H 1 is the depth value of the first groove 310
- V 1 represents the etching speed of the first film layer 03a
- H 2 is the thickness value of the second film layer 03b
- V 2 represents the etching rate of the second film layer 03b. speed.
- V 1 and V 2 represent the etching speed of the first film layer 03a and the etching speed of the second film layer 03b under the same etching parameters.
- the first film layer 03a and the second film layer 03b have different thicknesses and materials, so the first film layer 03a and the second film layer 03b have different etching speeds under the same etching parameters.
- the thickness and etching speed of the first film layer 03a and the second film layer 03b satisfy the above relationship (1), the etching time of the first groove 310 and the second section of the first via hole 320 is the same, and it can The first groove 310 and the second section of the first via 320 are simultaneously prepared in the same process step.
- the first film layer 03a can be arranged in various ways.
- the first film layer 03a can include more than two sub-layers, and the first groove 310 can be provided through at least one sub-layer.
- the first film layer 03a includes a first sub-layer 03a1 and a second sub-layer 03a2 located on the side of the first sub-layer 03a1 facing the substrate 01.
- the first groove 310 can be arranged in a variety of ways. For example, please continue to refer to FIG. 3.
- the first groove 310 runs through the first sub-layer 03a1.
- the sub-layer 03a1 and the second sub-layer 03a2, the second film layer 03b, the first sub-layer 03a1 and the second sub-layer 03a2 satisfy the following formula (2):
- H 11 represents the thickness of the first sub-layer 03a1
- V 11 represents the etching speed of the first sub-layer 03a1
- H 12 represents the thickness of the second sub-layer 03a2
- V 12 represents the thickness of the second sub-layer 03a2.
- H 2 is the thickness value of the second film layer 03 b
- V 2 represents the etching rate of the second film layer 03 b.
- V 11 , V 12 and V 2 represent the etching speeds of the first sub-layer 03a1 , the second sub-layer 03a2 and the second film layer 03b under the same etching parameters.
- the first film layer 03a includes a two-layer structure of a first sub-layer 03a1 and a second sub-layer 03a2, and the first groove 310 penetrates the first sub-layer 03a1 and the second sub-layer 03a1.
- 03a2 settings When the thickness and etching speed of the first sub-layer 03a1, the second sub-layer 03a2 and the second film layer 03b satisfy the above relationship (2), the etching time of the first groove 310 and the second segment is the same. , the first groove 310 and the second segment can be prepared simultaneously in the same process step.
- the first groove 310 penetrates the first sub-layer 03a1 , and the bottom of the first groove 310 is located in the second sub-layer 03a2 , that is, the bottom of the first groove 310
- the wall surface is the surface of the second sub-layer 03a2 facing away from the second film layer 03b.
- H 11 represents the thickness of the first sub-layer 03a1
- V 11 represents the etching speed of the first sub-layer 03a1
- H 2 represents the thickness value of the second film layer 03b
- V 2 represents the etching speed of the second film layer 03b. Erosion rate.
- the first groove 310 only penetrates the first sub-layer 03a1 and does not penetrate the second sub-layer 03a2.
- the etching time of the first groove 310 and the second section of the first via hole 320 is the same, and the first groove 310 and the second section of the first via hole 320 can be prepared simultaneously in the same process step. .
- the etching time of the first groove 310 and the second segment of the first via hole 320 may be different.
- the etching time of the first groove 310 is greater than the etching time of the first via hole 320 .
- Etching time for two segments Specifically, referring to FIG. 4 , the first groove 310 penetrates the first sub-layer 03a1, and the bottom wall surface of the first groove 310 is the surface of the second sub-layer 03a2 facing away from the second film layer 03b.
- the second film layer 03b and the first sub-layer 03a1 can satisfy the following formula (4):
- H11/V11 H12/V12+H2/V2 (4)
- H 11 represents the thickness of the first sub-layer 03a1
- V 11 represents the etching speed of the first sub-layer 03a1
- H 12 represents the thickness of the second sub-layer 03a2
- V 12 represents the thickness of the second sub-layer 03a2.
- H 2 is the thickness value of the second film layer 03 b
- V 2 represents the etching rate of the second film layer 03 b.
- the preparation is carried out according to the following process: first penetrate the first sub-layer 03a1 and the second sub-layer 03a2 in the first via area where the first via hole 320 is located, then prepare the first groove 310, and then prepare the first groove 310 while penetrating the second film layer 03b in the first via hole area to form the first via hole 320 in the first via hole area, then the first film layer 03a and the second film layer 03b need to satisfy formula (3).
- the preparation is carried out according to the following process: first only penetrate the first sub-layer 03a1 in the first via area where the first via hole 320 is located, and then prepare the first groove 310, while preparing the first groove 310, The via area penetrates the second sub-layer 03a2 and the second film layer 03b to form the first via hole 320 in the first via area, then the first film layer 03a and the second film layer 03b need to satisfy formula (4).
- the connecting portion 05 can also be provided on other film layers.
- the array substrate also includes a first conductive layer 06 and a second insulating layer 07.
- the first conductive layer 06 is located on the side of the first metal layer 02 facing the substrate 01, and the connection portion 05 is provided on the first Conductive layer 06;
- second insulating layer 07 is located between the first conductive layer 06 and the first metal layer 02.
- the second insulating layer 07 also includes a second via hole 710 connected to the first via hole 320.
- the second via hole 710 is provided through the second insulating layer 07 , and the orthographic projection of the second via hole 710 on the substrate 01 and the orthographic projection of the connecting portion 05 on the substrate 01 at least partially overlap, wherein the etching of the first groove 310 forms The time is equal to the sum of the etching formation times of the second segment and the second via hole 710 .
- the first conductive layer 06 may be the above-mentioned semiconductor layer.
- the first conductive layer 06 may be a new conductive layer of metal material added between the semiconductor layer and the first metal layer 02 .
- the first conductive layer 06 may be a new conductive layer of metal material added between the semiconductor layer and the substrate 01 .
- the connecting portion 05 is not located on the first metal layer 02 , a second insulating layer 07 is disposed between the connecting portion 05 and the second metal layer 04 , and a second insulating layer 07 is disposed on the second insulating layer 07 .
- the via hole 710 enables the signal line 420 to be connected to the connection part 05 through the first via hole 320 and the second via hole 710 .
- the etching formation time of the first groove 310 is equal to the sum of the etching formation time of the second segment and the second via hole 710, so that the first groove 310, the second segment, and the second via hole 710 can be Preparation and molding in the same process step can simplify the preparation method of the array substrate.
- the first film layer 03a may include a first sub-layer 03a1 and a second sub-layer located on the side of the first sub-layer 03a1 facing the substrate 01. Layer 03a2.
- the first groove 310 may be provided only through the first sub-layer 03a1, or the first groove 310 may pass through the second sub-layer 03a1 at the same time.
- a sub-layer 03a1 and a second sub-layer 03a2 are set.
- the first groove 310 penetrates the first sub-layer 03a1 and the second sub-layer 03a2, the second film layer 03b, the first sub-layer 03a1, the second The sub-layer 03a2 and the second insulation layer 07 satisfy the following formula (5):
- H 11 /V 11 +H 12 /V 12 H 2 /V 2+ H 3 /V 3 (5)
- H 11 represents the thickness of the first sub-layer 03a1
- V 11 represents the etching speed of the first sub-layer 03a1
- H 12 represents the thickness of the second sub-layer 03a2
- V 12 represents the thickness of the second sub-layer 03a2.
- Etching rate H 2 is the thickness value of the second film layer 03b
- V 2 represents the etching rate of the second film layer 03b
- H 3 is the thickness value of the second insulating layer 07
- V 3 represents the thickness of the second insulating layer 07 Etching speed.
- V 11 , V 12 , V 2 and V 3 represent the etching speeds of the first sub-layer 03a1 , the second sub-layer 03a2 , the second film layer 03b and the second insulating layer 07 under the same etching conditions.
- the first groove 310 can be prepared and formed in the same process step, which can simplify the preparation method of the array substrate.
- the first groove 310 penetrates the first sub-layer 03a1, and the bottom of the first groove 310 is the surface of the second sub-layer 03a2 facing away from the second film layer 03b,
- the second film layer 03b, the first sub-layer 03a1 and the second insulating layer 07 satisfy the following formula (6):
- H 11 /V 11 H 2 /V 2+ H 3 /V 3 (6)
- H 11 represents the thickness of the first sub-layer 03a1
- V 11 represents the etching speed of the first sub-layer 03a1
- H 2 represents the thickness value of the second film layer 03b
- V 2 represents the etching speed of the second film layer 03b.
- Etching rate H 3 is the thickness value of the second insulating layer 07
- V 3 represents the etching rate of the second insulating layer 07 .
- the first groove 310 and the first via hole 320 are The second segment and the second via hole 710 can be prepared and formed in the same process step, which can simplify the preparation method of the array substrate.
- the second insulating layer 07 may be an inter-gate insulating layer.
- the first sub-layer 03a1 and the second sub-layer 03a2 have various material settings.
- the first sub-layer 03a1 and the second sub-layer 03a2 have different material settings. Therefore, when When the first groove 310 penetrates the first sub-layer 03a1 but does not penetrate the second sub-layer 03a2, during the preparation process of the array substrate, by setting different etching parameters, the first sub-layer 03a1 can be etched, And reduce the etching influence of the second sub-layer 03a2.
- the materials of the first sub-layer 03a1 and the second film layer 03b are the same, so that under the same etching parameters, the etching of the first sub-layer 03a1 can be the same as the etching of the second film layer 03b.
- the time is the same, which facilitates the preparation of the array substrate.
- the etching speed of the second sub-layer 03a2 is greater than the etching speed of the first sub-layer 03a1.
- the etching speed of the second sub-layer 03a2 is greater than the etching speed of the first sub-layer 03a1, so the etching time of the second sub-layer 03a2 is shorter.
- first sub-layer 03a1 When the first sub-layer 03a1 is simultaneously etched to form the first groove 310, and the second sub-layer 03a2 and the second insulating layer 07 are etched to form the second segment and the second via hole 710, when etching After the second sub-layer 03a2 is finished, the first sub-layer 03a1 has not yet completed etching, so the first sub-layer 03a1 and the second insulating layer 07 can continue to be etched, and finally the first groove 310 and the second insulating layer 07 are formed simultaneously. Via 710 and a second segment of first via 320 .
- the material of the second film layer 03b and the first sub-layer 03a1 includes silicon oxide
- the material of the second sub-layer 03a2 includes nitride
- Silicon, or the material of the second film layer 03b and the first sub-layer 03a1 includes silicon nitride
- the material of the second sub-layer 03a2 includes silicon oxide.
- the materials of the first sub-layer 03a1 and the second sub-layer 03a2 are different, and the first sub-layer 03a1 and the second sub-layer 03a2 can be etched in steps by setting etching parameters.
- the materials of the second film layer 03b and the first sub-layer 03a1 are the same.
- the materials of the second film layer 03b and the first sub-layer 03a1 can be etched in the same step to form the first groove 310 and the first via hole 320. the second segment.
- the thickness of the second film layer 03b is greater than the thickness of the first sub-layer 03a1.
- the material of the second film layer 03b is the same as the material of the first sub-layer 03a1.
- the first groove 310 and the second section of the first via hole 320 are etched.
- 310 can also be formed in the second sub-layer 03a2, which can increase the depth of the first groove 310, reduce the distance between the bottom of the first groove 310 and the first capacitor plate 210, and improve the distance between the first capacitor plate 210 and the second capacitor plate 210.
- FIG. 8 is a schematic flow chart of a method for preparing an array substrate according to the second embodiment of the present application.
- the second aspect of the present application also provides a method for preparing an array substrate.
- the array substrate can be the array substrate in any of the above embodiments.
- the preparation method of the array substrate includes:
- Step S01 As shown in Figure 9, a substrate to be etched is provided.
- the substrate to be etched includes a substrate 01, a first metal layer 02 and a first insulating layer to be etched sequentially on one side of the substrate 01.
- a metal layer 02 includes a first capacitor plate 210.
- the first insulating layer to be etched has a first groove area and a first via area.
- the orthographic projection of the first capacitor plate 210 on the substrate 01 is consistent with the first concave area.
- the orthographic projections of the trench regions on the substrate 01 at least partially overlap.
- Step S02 As shown in Figure 10, a photoresist layer 08 is provided on the surface of the first insulating layer to be etched away from the first metal layer 02, and the photoresist layer 08 is patterned to form a first etching groove 810. and a second etching groove 820.
- the first etching groove 810 is located in the first groove area and is formed by a surface recess of the photoresist layer 08 away from the first insulating layer to be etched.
- the second etching groove 820 is located in the first pass.
- the hole area is provided through the photoresist layer 08 .
- Step S03 As shown in FIG. 11, perform a first etching process on the substrate to be etched with the photoresist layer 08 to remove at least part of the thickness of the first insulating layer to be etched in the first via hole area.
- Step S04 As shown in FIG. 12, the photoresist layer 08 is thinned so that the first etching groove 810 penetrates the photoresist layer 08.
- Step S05 As shown in Figure 13, perform a second etching process on the substrate to be etched with the photoresist layer 08 to form an array substrate including a first insulating layer 03.
- the first insulating layer 03 includes an array substrate located in the first recess.
- the first groove 310 is formed by a depression on the surface of the first insulating layer 03 away from the first metal layer 02, and the first via hole 320 passes through it.
- the first insulation layer 03 is provided.
- step S02 a photoresist layer 08 is provided on the surface of the first substrate to be etched, and then the photoresist is patterned, so that the subsequent In the etching process step S03, at least part of the thickness of the first insulating layer to be etched can be removed in the first via hole area.
- step S04 the photoresist is subjected to a second processing, that is, a thinning process. After thinning, the thickness of the photoresist is reduced, causing the first etching groove 810 to penetrate the photoresist layer 08.
- step S05 a second etching process is performed.
- the first groove 310 is formed in the first etching groove 810, and the first groove 310 is formed in the second etching groove 820. Hole 320. Therefore, the etching process of the first groove 310 and the first via hole 320 only requires one photoresist coating process, and there is no need to repeatedly coat and clean the photoresist layer 08 , which can simplify the preparation process of the array substrate and improve the efficiency of the array substrate. preparation efficiency.
- the second capacitor plate 410 can be disposed at the first groove 310, and the second capacitor plate 410 can be adjusted by controlling the position of the first groove 310. and the effective overlapping area of the first capacitor plate 210, thereby changing the capacitance parameters and improving the yield of the array substrate.
- the first insulating layer to be etched includes a first film layer 03a and a second film located between the first film layer 03a and the first metal layer 02. Layer 03b. Then in step S03, when the first etching process is performed on the substrate to be etched, the first film layer 03a with a thickness of n 1 * H 1 can be removed in the first via area, where n 1 is a coefficient greater than 0 and less than 1, H 1 is the thickness value of the first film layer 03a.
- step S05 when the substrate to be etched is etched for the second time in step S05, at least part of the first film layer 03a is removed in the first groove area to form the first groove 310, and in the first via hole
- the first film layer 03a and the second film layer 03b with a thickness of (1-n 1 )*H 1 are removed to form a first via hole 320 penetrating the first film layer 03a and the second film layer 03b.
- the first film layer 03a with a thickness of n 1 *H 1 is first removed, and the first groove 310 and the first film layer 03a with a thickness of (1-n 1 )*H 1 are formed in the second etching process.
- the first film layer 03a and the second film layer 03b, that is, the first groove 310 and the first via hole 320 are formed, which can simplify the preparation process of the array substrate and improve the preparation efficiency of the array substrate.
- the first film layer 03a may include a first sub-layer 03a1 and a second sub-layer 03a2 located on the side of the first sub-layer 03a1 facing the substrate 01.
- the first sub-layer 03a2 The thickness of 03a1 is n 1 * H 1 ; as shown in Figure 16 , in the first etching process of the substrate to be etched in step S03 , the first sub-layer 03a1 is removed to form the first via hole 320 First segment.
- step S05 of performing the second etching process on the substrate to be etched part or all of the first sub-layer 03a1 is removed in the first groove area, or in the first groove area Remove the first sub-layer 03a1 and at least part of the second sub-layer 03a2 to form the first groove 310; remove the second sub-layer 03a2 and the second film layer 03b in the first via area to form a through-hole first
- the first via hole 320 of the film layer 03a and the second film layer 03b that is, in step S05, the first groove 310 and the second segment are formed simultaneously, and the second segment and the first segment form the first via hole 320.
- the first groove 310 and the second segment can be manufactured and formed in the same process step, which can simplify the manufacturing process of the array substrate and improve the manufacturing efficiency of the array substrate.
- the first insulating layer to be etched includes a first film layer 03a and a second film layer 03b located between the first film layer 03a and the first metal layer 02
- the first film layer 03a and the second film layer 03b with a thickness of n 2 *H 2 are removed in the first via hole area, and n 2 is greater than A coefficient of 0 and less than 1, H 2 is the thickness value of the second film layer 03b.
- step S05 In the second etching process of the substrate to be etched in step S05, at least part of the first film layer 03a is removed in the first groove area to form the first groove 310, and (1 -n 2 )*H 2 thickness of the second film layer 03b to form a first via hole 320 penetrating the first film layer 03a and the second film layer 03b.
- the first film layer 03a and part of the second film layer 03b can be completely removed in the first via area in step S03, and the first film layer 03a and part of the second film layer 03b can be removed in the first groove area in step S05.
- the film layer 03a forms the first groove 310, and the remaining part of the second film layer 03b is removed in the first via hole area to form the second via hole 710.
- the second film layer 03b includes a third sub-layer 03b1 and a fourth sub-layer 03b2 located on the side of the third sub-layer 03b1 facing the substrate 01.
- the thickness of the fourth sub-layer 03b2 is n 2 * H2 ;
- the first film layer 03 a and the third sub-layer 03 b 1 are removed in the first via area.
- the second etching process of the substrate to be etched in step S05 at least part of the first film layer 03a is removed in the first groove area to form the first groove 310, and the fourth film layer 03a is removed in the first via hole area.
- the sub-layer 03b2 is formed to form a first via hole 320 penetrating the first film layer 03a and the second film layer 03b.
- the first film layer 03a and the third sub-layer 03b1 can be removed in the first via area in step S03.
- step S04 continue to remove the fourth sub-layer 03 b2 of the first via hole 320 to form the first via hole 320 .
- the first film layer 03a when the first insulating layer to be etched includes a first film layer 03a and a second film layer 03b located between the first film layer 03a and the first metal layer 02 , in step S03, the first film layer 03a can also be removed in the first via area.
- step S05 at least part of the first film layer 03a can be removed in the first groove area to form the first groove 310, and the second film layer 03b can be removed in the first via hole area to form a penetrating first film layer 03a and The first via hole 320 of the second film layer 03b.
- the first section and the second section of the first via 320 are formed in steps S03 and S05 respectively, and the first section is simultaneously prepared when the second section is formed in step S05.
- the groove 310 can simplify the preparation process of the array substrate and improve the preparation efficiency of the array substrate.
- the first film layer 03a may also include the above-mentioned first layer and a second sub-layer 03a2 located on the side of the first sub-layer 03a1 facing the substrate 01.
- the array substrate also includes a connection portion 05.
- a connection portion 05 As shown in Figures 9 to 20, when the connection portion 05 is located on the first metal layer 02, a first first groove is formed in the first groove area in step S05. Groove 310, and remove the remaining part of the first insulating layer to be etched in the first via hole area to form the first via hole 320, so that the connection part 05 can be exposed through the first via hole 320, and then in the first insulating layer to be etched When depositing metal material on the second metal layer 04 to form the second metal layer 04 , at least part of the metal material can fall into the first via hole 320 and connect with the connection portion 05 .
- step S05 when the array substrate includes the above-mentioned first conductive layer 06 and second insulating layer 07, the first conductive layer 06 is located on the side of the first metal layer 02 facing the substrate 01, The first conductive layer 06 is provided with a connection portion 05 located in the first via area, and when the second insulating layer 07 is located between the first conductive layer 06 and the first metal layer 02, step S05 also includes: The second insulating layer 07 is removed in the hole area to form a second via hole 710 penetrating the second insulating layer 07 so that the connection portion 05 can be exposed by the first via hole 320 and the second via hole 710 . This facilitates the mutual connection between the signal line 420 and the connection part 05 .
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- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Semiconductor Integrated Circuits (AREA)
Abstract
Description
Claims (20)
- 一种阵列基板,包括:衬底;第一金属层,位于所述衬底的一侧,所述第一金属层包括第一电容极板;第一绝缘层,位于所述第一金属层背离所述衬底的一侧,所述第一绝缘层包括第一凹槽和第一过孔,所述第一凹槽由所述第一绝缘层背离所述第一金属层的表面凹陷形成,所述第一过孔贯穿所述第一绝缘层设置,所述第一凹槽在所述衬底上的正投影与所述第一电容极板在所述衬底上的正投影至少部分交叠,所述第一过孔在所述衬底上的正投影和所述第一电容极板在所述衬底上的正投影错位设置;第二金属层,位于所述第一绝缘层背离所述第一金属层的一侧,所述第二金属层包括第二电容极板,至少部分所述第二电容极板位于所述第一凹槽内。
- 根据权利要求1所述的阵列基板,其中,所述第一绝缘层包括第一膜层和位于所述第一膜层朝向所述第一金属层的第二膜层,所述第一凹槽贯穿所述第一膜层设置或者贯穿部分所述第一膜层,所述第一过孔包括贯穿所述第一膜层的第一分段和贯穿至少部分所述第二膜层的第二分段。
- 根据权利要求2所述的阵列基板,还包括连接部,所述连接部位于所述第一绝缘层背离所述第二金属层的一侧,所述第二凹槽在所述衬底上的正投影和所述连接部在所述衬底上的正投影至少部分交叠,所述第二金属层还包括信号线,至少部分所述信号线通过所述第一过孔与所述连接部过孔电连接。
- 根据权利要求3所述的阵列基板,其中,所述连接部设置于所述第一金属层,所述第二分段的刻蚀形成时间与所述第一凹槽的刻蚀形成时间相同。
- 根据权利要求4所述的阵列基板,其中,所述第一凹槽贯穿所述第一膜层,所述第一膜层和所述第二膜层的厚度和材料相同。
- 根据权利要求4所述的阵列基板,其中,所述第一膜层和所述第二膜层的厚度和材料均不相同,且所述第一膜层和所述第二膜层满足如下公式(1):H 1/V 1=H 2/V 2 (1)其中,H 1为所述第一凹槽的深度值,V 1表示所述第一膜层的刻蚀速度,H 2为所述第二膜层的厚度值,V 2表示所述第二膜层的刻蚀速度。
- 根据权利要求4所述的阵列基板,其中,所述第一膜层包括第一子分层和位于所述第一子分层朝向所述衬底一侧的第二子分层,所述第一凹槽贯穿第一子分层和第二子分层,所述第二膜层、所述第一子分层和所述第二子分层满足如下公式(2):H 11/V 11+H 12/V 12=H 2/V 2 (2)其中,H 11表示所述第一子分层的厚度,V 11表示所述第一子分层的刻蚀速度,H 12表示所述第二子分层的厚度,V 12表示所述第二子分层的刻蚀速度,H 2为所述第二膜层的厚度值,V 2表示所述第二膜层的刻蚀速度。
- 根据权利要求4所述的阵列基板,其中,所述第一膜层包括第一子分层和位于所述第一子分层朝向所述衬底一侧的第二子分层,所述第一凹槽贯穿第一子分层,并且所述第一凹槽的底壁面为所述第二子分层背离所述第二膜层的表面,所述第二膜层和所述第一子分层满足如下公式(3)或(4):H 11/V 11=H 2/V 2 (3)H 11/V 11=H 12/V 12+H 2/V 2 (4)其中,H 11表示所述第一子分层的厚度,V 11表示所述第一子分层的刻蚀速度,H 12表示所述第二子分层的厚度,V 12表示所述第二子分层的刻蚀速度,H 2为所述第二膜层的厚度值,V 2表示所述第二膜层的刻蚀速度。
- 根据权利要求3所述的阵列基板,还包括:第一导电层,位于所述第一金属层朝向所述衬底的一侧,所述连接部设置于所述第一导电层;第二绝缘层,位于所述第一导电层和所述第一金属层之间,所述第二绝缘层还包括与所述第一过孔连通的第二过孔,所述第二过孔贯穿所述第 二绝缘层设置,且所述第二过孔在所述衬底上的正投影和所述连接部在所述衬底上的正投影至少部分交叠;其中,所述第一凹槽的刻蚀形成时间等于所述第二分段和所述第二过孔的刻蚀形成时间之。
- 根据权利要求9所述的阵列基板,其中,所述第一膜层包括第一子分层和位于所述第一子分层朝向所述衬底一侧的第二子分层,所述第一凹槽贯穿第一子分层和第二子分层;所述第二膜层、所述第一子分层、所述第二子分层以及所述第二绝缘层满足如下公式(5):H 11/V 11+H 12/V 12=H 2/V 2+H 3/V 3 (5)其中,H 11表示所述第一子分层的厚度,V 11表示所述第一子分层的刻蚀速度,H 12表示所述第二子分层的厚度,V 12表示所述第二子分层的刻蚀速度,H 2为所述第二膜层的厚度值,V 2表示所述第二膜层的刻蚀速度,H 3为所述第二绝缘层的厚度值,V 3表示所述第二绝缘层的刻蚀速度。
- 根据权利要求9所述的阵列基板,其中,所述第一膜层包括第一子分层和位于所述第一子分层朝向所述衬底一侧的第二子分层,所述第一凹槽贯穿第一子分层,并且所述第一凹槽的底部位于所述第二子分层,所述第二膜层、所述第一子分层以及所述第二绝缘层满足如下公式(6):H 11/V 11=H 2/V 2+H 3/V 3 (6)其中,H 11表示所述第一子分层的厚度,V 11表示所述第一子分层的刻蚀速度,H 2为所述第二膜层的厚度值,V 2表示所述第二膜层的刻蚀速度,H 3为所述第二绝缘层的厚度值,V 3表示所述第二绝缘层的刻蚀速度;
- 根据权利要求9所述的阵列基板,其中,所述第一导电层为半导体层,所述半导体层还包括半导体部,所述第二绝缘层为栅间绝缘层。
- 根据权利要求4或9所述的阵列基板,其中,所述第一子分层和所述第二子分层的材料不同;和/或所述第一子分层和所述第二膜层的材料相同。
- 根据权利要求4或9所述的阵列基板,其中,所述第二子分层的刻蚀速度大于所述第一子分层的刻蚀速度;和/或,所述第二膜层的厚度大于所述第一子分层的厚度。
- 根据权利要求4或9所述的阵列基板,其中,所述第二膜层和所述第一子分层的材料包括氧化硅,所述第二子分层的材料包括氮化硅,或者,所述第二膜层和所述第一子分层的材料包括氮化硅,所述第二子分层的材料包括氧化硅。
- 一种阵列基板的制备方法,其中,包括:提供一种待刻蚀基板,所述待刻蚀基板包括衬底和依次设置于衬底一侧的第一金属层和第一待刻蚀绝缘层,所述第一金属层包括第一电容极板,所述第一待刻蚀绝缘层具有第一凹槽区和第一过孔区,所述第一电容极板在所述衬底上的正投影与所述第一凹槽区在所述衬底上的正投影至少部分交叠;在所述第一待刻蚀绝缘层背离所述第一金属层的表面设置光刻胶层,并对所述光刻胶层进行图案化处理形成第一刻蚀槽和第二刻蚀槽,所述第一刻蚀槽位于所述第一凹槽区且由所述光刻胶层背离所述第一待刻蚀绝缘层的表面凹陷形成,所述第二刻蚀槽位于所述第一过孔区且贯穿所述光刻胶层设置;对带有所述光刻胶层的所述待刻蚀基板进行第一次刻蚀处理,以在所述第一过孔区去除至少部分厚度的所述第一待刻蚀绝缘层;对所述光刻胶层进行减薄处理,使得在第一刻蚀槽贯穿所述光刻胶层;对带有所述光刻胶层的所述待刻蚀基板进行第二次刻蚀处理形成包括第一绝缘层的阵列基板,所述第一绝缘层包括位于所述第一凹槽区的第一凹槽和位于所述第一过孔区的第一过孔,所述第一凹槽由所述第一绝缘层背离所述第一金属层的表面凹陷形成,所述第一过孔贯穿所述第一绝缘层设置。
- 根据权利要求16所述的方法,其中,所述第一待刻蚀绝缘层包括第一膜层和位于所述第一膜层朝向所述第一金属层的第二膜层,在对带有所述光刻胶层的所述待刻蚀基板进行第一次刻蚀处理的步骤中,在所述第一过孔区去除n 1*H 1厚度的第一膜层,n 1为大于0且小于1 的系数,H 1为所述第一膜层的厚度值;在对带有所述光刻胶层的所述待刻蚀基板进行第二次刻蚀处理的步骤中,在所述第一凹槽区去除至少部分所述第一膜层以形成所述第一凹槽,在所述第一过孔区去除(1-n 1)*H 1厚度的第一膜层及第二膜层,以形成贯穿所述第一膜层和所述第二膜层的所述第一过孔;所述第一膜层包括第一子分层和位于所述第一子分层朝向所述衬底一侧的第二子分层,所述第一子分层的厚度为n 1*H 1;在对带有所述光刻胶层的所述待刻蚀基板进行第一次刻蚀处理的步骤中,在所述第一过孔区去除所述第一子分层;在对带有所述光刻胶层的所述待刻蚀基板进行第二次刻蚀处理的步骤中,在所述第一凹槽区去除部分或全部的所述第一子分层,或者在所述第一凹槽区去除所述第一子分层和至少部分所述第二子分层,以形成所述第一凹槽;在所述第一过孔区去除所述第二子分层和所述第二膜层,以形成贯穿所述第一膜层和所述第二膜层的所述第一过孔。
- 根据权利要求16所述的方法,其中,所述第一待刻蚀绝缘层包括第一膜层和位于所述第一膜层朝向所述第一金属层的第二膜层,在对带有所述光刻胶层的所述待刻蚀基板进行第一次刻蚀处理的步骤中,在所述第一过孔区去除所述第一膜层和n 2*H 2厚度的第二膜层,n 2为大于0且小于1的系数,H 2为所述第二膜层的厚度值;在对带有所述光刻胶层的所述待刻蚀基板进行第二次刻蚀处理的步骤中,在所述第一凹槽区去除至少部分所述第一膜层以形成所述第一凹槽,在所述第一过孔区去除(1-n 2)*H 2厚度的第二膜层,以形成贯穿所述第一膜层和所述第二膜层的所述第一过孔;所述第二膜层包括第三子分层和位于所述第三子分层朝向所述衬底一侧的第四子分层,所述第四子分层的厚度为n 2*H 2;在对带有所述光刻胶层的所述待刻蚀基板进行第一次刻蚀处理的步骤中,在所述第一过孔区去除所述第一膜层和所述第三子分层;在对带有所述光刻胶层的所述待刻蚀基板进行第二次刻蚀处理的步骤中,在所述第一凹槽区去除至少部分所述第一膜层以形成所述第一凹槽, 在所述第一过孔区去除所述第四子分层,以形成贯穿所述第一膜层和所述第二膜层的所述第一过孔。
- 根据权利要求16所述的方法,其中,所述第一待刻蚀绝缘层包括第一膜层和位于所述第一膜层朝向所述第一金属层的第二膜层,在对带有所述光刻胶层的所述待刻蚀基板进行第一次刻蚀处理的步骤中,在所述第一过孔区去除所述第一膜层;在对带有所述光刻胶层的所述待刻蚀基板进行第二次刻蚀处理的步骤中,在所述第一凹槽区去除至少部分所述第一膜层以形成所述第一凹槽,在所述第一过孔区去除所述第二膜层,以形成贯穿所述第一膜层和所述第二膜层的所述第一过孔。
- 根据权利要求16至19任一项所述的方法,其中,所述待刻蚀基板还包括第一导电层和第二绝缘层,所述第一导电层位于所述第一金属层朝向所述衬底的一侧,所述第一导电层设置有位于所述第一过孔区的连接部,所述第二绝缘层位于所述第一导电层和所述第一金属层之间,在对带有所述光刻胶层的所述待刻蚀基板进行第二次刻蚀处理的步骤中还包括:在所述第一过孔区去除所述第二绝缘层以形成贯穿所述第二绝缘层的第二过孔。
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| US19/006,298 US20250142962A1 (en) | 2022-08-25 | 2024-12-31 | Array base plate and method for manufacturing array base plate |
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| CN104716091A (zh) * | 2013-12-13 | 2015-06-17 | 昆山国显光电有限公司 | 阵列基板的制备方法、阵列基板和有机发光显示器件 |
| CN110459561A (zh) * | 2019-07-26 | 2019-11-15 | 武汉华星光电半导体显示技术有限公司 | 一种阵列基板及oled显示装置 |
| CN111276499A (zh) * | 2020-03-26 | 2020-06-12 | 合肥鑫晟光电科技有限公司 | 显示用基板及其制备方法、显示装置 |
| CN111312728A (zh) * | 2020-02-27 | 2020-06-19 | 武汉华星光电半导体显示技术有限公司 | 阵列基板及其制作方法 |
| CN112331681A (zh) * | 2020-11-25 | 2021-02-05 | 湖北长江新型显示产业创新中心有限公司 | 一种显示面板和显示装置 |
| US20210408511A1 (en) * | 2019-08-28 | 2021-12-30 | Yungu (Gu'an) Technology Co., Ltd. | Display panels, display apparatuses and preparation methods of display panel |
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| CN108376672B (zh) * | 2018-03-15 | 2020-12-04 | 京东方科技集团股份有限公司 | 阵列基板及其制备方法,以及显示装置 |
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| CN104716091A (zh) * | 2013-12-13 | 2015-06-17 | 昆山国显光电有限公司 | 阵列基板的制备方法、阵列基板和有机发光显示器件 |
| CN110459561A (zh) * | 2019-07-26 | 2019-11-15 | 武汉华星光电半导体显示技术有限公司 | 一种阵列基板及oled显示装置 |
| US20210408511A1 (en) * | 2019-08-28 | 2021-12-30 | Yungu (Gu'an) Technology Co., Ltd. | Display panels, display apparatuses and preparation methods of display panel |
| CN111312728A (zh) * | 2020-02-27 | 2020-06-19 | 武汉华星光电半导体显示技术有限公司 | 阵列基板及其制作方法 |
| CN111276499A (zh) * | 2020-03-26 | 2020-06-12 | 合肥鑫晟光电科技有限公司 | 显示用基板及其制备方法、显示装置 |
| CN112331681A (zh) * | 2020-11-25 | 2021-02-05 | 湖北长江新型显示产业创新中心有限公司 | 一种显示面板和显示装置 |
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| US20250142962A1 (en) | 2025-05-01 |
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