US20150270320A1 - Anode connection structure of organic light-emitting diode and manufacturing method thereof - Google Patents
Anode connection structure of organic light-emitting diode and manufacturing method thereof Download PDFInfo
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- US20150270320A1 US20150270320A1 US14/732,718 US201514732718A US2015270320A1 US 20150270320 A1 US20150270320 A1 US 20150270320A1 US 201514732718 A US201514732718 A US 201514732718A US 2015270320 A1 US2015270320 A1 US 2015270320A1
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- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims abstract description 43
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- 238000000034 method Methods 0.000 claims abstract description 15
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- 238000002955 isolation Methods 0.000 claims description 6
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- 239000004332 silver Substances 0.000 claims description 6
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 claims description 6
- 239000010410 layer Substances 0.000 description 121
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- H01L27/3248—
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/417—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions carrying the current to be rectified, amplified or switched
- H01L29/41725—Source or drain electrodes for field effect devices
- H01L29/41733—Source or drain electrodes for field effect devices for thin film transistors with insulated gate
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/45—Ohmic electrodes
- H01L29/456—Ohmic electrodes on silicon
- H01L29/458—Ohmic electrodes on silicon for thin film silicon, e.g. source or drain electrode
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
- H01L29/78603—Thin film transistors, i.e. transistors with a channel being at least partly a thin film characterised by the insulating substrate or support
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
- H01L29/78651—Silicon transistors
- H01L29/7866—Non-monocrystalline silicon transistors
- H01L29/78672—Polycrystalline or microcrystalline silicon transistor
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
- H01L29/78651—Silicon transistors
- H01L29/7866—Non-monocrystalline silicon transistors
- H01L29/78672—Polycrystalline or microcrystalline silicon transistor
- H01L29/78675—Polycrystalline or microcrystalline silicon transistor with normal-type structure, e.g. with top gate
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- 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
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- 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
- H10K59/123—Connection of the pixel electrodes to the thin film transistors [TFT]
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- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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- 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
Definitions
- the present invention relates to the field of light-emitting diodes, and in particular to an anode connection structure of an organic light-emitting diode and a manufacturing method thereof.
- OLED organic light-emitting diode display
- organic electroluminescent diode is a novel displaying technology of which the development was dated back to the middle of the 20th century.
- the organic electroluminescent diode has various advantages over a liquid crystal display, such as being fully solid state, active emission of light, high brightness, high contrast, being ultra thin, low cost, low power consumption, fast response, wide view angle, wide range of operation temperature, and being capable of flexible displaying.
- the structure of an organic electroluminescent diode generally comprises a substrate, an anode, a cathode, and an organic function layer and the principle of light emission thereof is that multiple layers of organic materials that are of extremely small thickness is formed between the anode and the cathode through vapor deposition, whereby positive and negative carriers, when injected into the organic semiconductor films, re-combine with each other to generate light.
- the organic function layer of the organic electroluminescent diode is generally made up of three function layers, which are respectively a hole transport layer (HTL), an emissive layer (EML), and an electron transport layer (ETL). Each of the function layers can be a single layer or more than one layer.
- the hole transport layer may sometimes be further divided into a hole injection layer and a hole transport layer and the electron transport layer may also be divided into an electron transport layer and an electron injection layer. However, they are of substantially the same function and are thus collectively referred to as the hole transport layer and the electron transport layer.
- the manufacture of a full-color organic electroluminescent diode is generally done with three methods, which are RGB juxtaposition and individual emission method, white light in combination with color filter method, and color conversion method, among which the RGB juxtaposition and individual emission method is most promising and has the most practical applications.
- the manufacturing method thereof is that red, green, and blue use different subject and object light-emitting materials.
- the organic light-emitting diodes can be classified in two types, according to the method of driving, which are active driving and passive driving, namely direct addressing and TFT (Thin-Film Transistor) matrix addressing.
- the active driving type organic light-emitting diode is the so called active matrix organic light emitting device (AMOLED).
- the AMOLED has a pixel circuit and a compensation circuit that are much more complicated than those of a liquid crystal display (LCD) and thus, for the conventional AMOLED products, the available number of pixels per inch (PPI) is less than 280 , rendering the resolution relatively low.
- LCD liquid crystal display
- FIGS. 1 and 2 schematic views are given to show a conventional anode connection structure of an organic light-emitting diode.
- An anode 100 is electrically connected to a low-temperature poly-silicon layer 50 by driving the source/drain terminal 300 of the thin-film transistor. Due to the arrangement of a metal layer of the source/drain terminal 300 , the distance between switching thin-film transistors on the two sides is increased, whereby the area of the pixel is relatively large and thus the number of pixels per inch is reduced, leading to a relatively low resolution.
- An object of the present invention is to provide an anode connection structure of an organic light-emitting diode, which has a simple structure, a low cost, a small pixel area, and a high resolution.
- Another object of the present invention is to provide a manufacturing method of an anode connection structure of an organic light-emitting diode, which has a simply manufacturing process and can effectively reduce a pixel area and improve resolution.
- an anode connection structure of an organic light-emitting diode which comprises: a thin-film transistor and an anode of an organic light-emitting diode arranged on the thin-film transistor.
- the thin-film transistor comprises a low-temperature poly-silicon layer formed on a substrate, a gate insulation layer formed on the low-temperature poly-silicon layer, a gate formed on the gate insulation layer, a protection layer formed on the gate, and a source/drain formed on the protection layer.
- the anode of the organic light-emitting diode is connected to the low-temperature poly-silicon layer.
- a planarization layer is arranged between the thin-film transistor and the anode of the organic light-emitting diode.
- the substrate comprises a glass substrate.
- An isolation layer is formed between the substrate and the low-temperature poly-silicon layer.
- the anode of the organic light-emitting diode comprises one of an indium tin oxide layer, an indium zinc oxide layer, an aluminum layer, a silver layer, and a molybdenum layer or a lamination thereof.
- the present invention also provides an anode connection structure of an organic light-emitting diode, which comprises: a thin-film transistor and an anode of an organic light-emitting diode arranged on the thin-film transistor, the thin-film transistor comprising a low-temperature poly-silicon layer formed on a substrate, a gate insulation layer formed on the low-temperature poly-silicon layer, a gate formed on the gate insulation layer, a protection layer formed on the gate, and a source/drain formed on the protection layer, the anode of the organic light-emitting diode being connected to the low-temperature poly-silicon layer;
- planarization layer is arranged between the thin-film transistor and the anode of the organic light-emitting diode.
- the substrate comprises a glass substrate.
- An isolation layer is formed between the substrate and the low-temperature poly-silicon layer.
- the anode of the organic light-emitting diode comprises one of an indium tin oxide layer, an indium zinc oxide layer, an aluminum layer, a silver layer, and a molybdenum layer or a lamination thereof.
- the present invention further provides a manufacture method of an anode connection structure of an organic light-emitting diode, which comprises the following steps:
- the substrate comprises a thin-film transistor formed thereon;
- the thin-film transistor comprises the low-temperature poly-silicon layer that is formed on the substrate, a gate insulation layer formed on the low-temperature poly-silicon layer, a gate formed on the gate insulation layer, a protection layer formed on the gate, and a source/drain formed on the protection layer.
- the substrate comprises a glass substrate.
- An isolation layer is arranged between the substrate and the low-temperature poly-silicon layer.
- the electrically conductive layer comprises one of an indium tin oxide layer, an indium zinc oxide layer, an aluminum layer, a silver layer, and a molybdenum layer or a lamination thereof.
- the efficacy of the present invention is that the present invention provides an anode connection structure of an organic light-emitting diode and a manufacturing method thereof, wherein the anode of the organic light-emitting diode is directly connected to a low-temperature poly-silicon layer of a thin-film transistor without interconnection therebetween achieved with a source/drain metal layer so as to effectively reduce the distance between two adjacent switching thin-film transistors, thereby effectively reducing the pixel area, increasing the number of pixels in a unit area (each inch), and improving the resolution of a panel using the anode connection structure of the organic light-emitting diode.
- FIG. 1 is a schematic view showing the structure of a conventional anode connection structure of an organic light-emitting diode
- FIG. 2 is a top plan view of the conventional anode connection structure of the organic light-emitting diode
- FIG. 3 is a schematic view showing the structure of an anode connection structure of an organic light-emitting diode according to the present invention
- FIG. 4 is a top plan view of the anode connection structure of the organic light-emitting diode according to the present invention.
- FIG. 5 is a flow chart illustrating a manufacturing method of an anode connection structure of an organic light-emitting diode according to the present invention.
- the present invention provides an anode connection structure of an organic light-emitting diode, which comprises: a thin-film transistor 20 and an anode 40 of an organic light-emitting diode arranged on the thin-film transistor 20 .
- the thin-film transistor 20 comprises a low-temperature poly-silicon layer 24 formed on a substrate 22 , a gate insulation (GI) layer 26 formed on the low-temperature poly-silicon layer 24 , a gate (not shown) formed on the gate insulation layer 26 , a protection layer (ILD) 27 formed on the gate, and a source/drain (SD) 28 formed on the protection layer 27 .
- GI gate insulation
- ILD protection layer
- SD source/drain
- the anode 40 of the organic light-emitting diode is directly connected to the low-temperature poly-silicon layer 24 in order to reduce the distance between two adjacent switching thin-film transistors and thus effectively reducing the pixel area, increasing the number of pixels in a unit area (each inch), and improving the resolution of a panel using the anode connection structure of the organic light-emitting diode.
- the thin-film transistor 20 comprises a switching thin-film transistor and a driving thin-film transistor.
- the anode 40 of the organic light-emitting diode is connected to the low-temperature poly-silicon layer 24 of the driving thin-film transistor.
- a planarization layer 60 is arranged between the thin-film transistor 20 and the anode 40 of the organic light-emitting diode, which avoids influence of displaying performance caused by corrosion and breaking resulting from impurities contained in the anode 40 of the organic light-emitting diode.
- the substrate 22 is a glass substrate and the anode 40 of the organic light-emitting diode comprises one of an indium tin oxide (ITO) layer, an indium zinc oxide (IZO) layer, an aluminum (Al) layer, a silver (Ag) layer, and a molybdenum (Mo) layer or a lamination thereof.
- ITO indium tin oxide
- IZO indium zinc oxide
- Al aluminum
- Al silver
- Mo molybdenum
- an isolation layer 29 is further arranged between the substrate 22 and the low-temperature poly-silicon layer 24 to prevent impurities from spreading to the thin-film transistor 20 to cause malfunctioning of the thin-film transistor 20 .
- the present invention further provides a manufacturing method of an anode connection structure of an organic light-emitting diode, which comprises the following steps:
- Step 1 providing a substrate 22 , wherein the substrate 22 comprises a thin-film transistor 20 formed thereon.
- the substrate 22 is a glass substrate.
- the thin-film transistor 20 comprises a low-temperature poly-silicon layer 24 formed on the substrate 22 , a gate insulation layer 26 formed on the low-temperature poly-silicon layer 24 , a gate formed on the gate insulation layer 26 , a protection layer 27 formed on the gate, and a source/drain 28 formed on the protection layer 27 .
- the thin-film transistor 20 comprises a switching thin-film transistor and a driving thin-film transistor.
- Step 2 forming a planarization layer 60 on the thin-film transistor 20 .
- the planarization layer 60 functions to avoid influence of displaying performance caused by corrosion and breaking resulting from impurities contained in the anode 40 of the organic light-emitting diode.
- Step 3 forming a hole in the planarization layer 60 and the thin-film transistor 20 to expose the low-temperature poly-silicon layer 24 of the thin-film transistor 20 .
- a masking process is applied to form a hole in the planarization layer 60 and the driving thin-film transistor at a location corresponding to the source/drain 28 in order to expose the metal layer that serves as the source/drain 28 ; and then, the metal layer of the source/drain 28 is etched off to expose the low-temperature poly-silicon layer 24 located thereunder.
- Step 4 forming an electrically conductive layer on the planarization layer 60 and the exposed low-temperature poly-silicon layer 24 and patternizing the electrically conductive layer to form a new source/drain 280 on the low-temperature poly-silicon layer 24 thereby completing the entirety of the driving thin-film transistor, and at the same time, forming an anode 40 of the organic light-emitting diode on the planarization layer 60 .
- the anode 40 of the organic light-emitting diode and the new source/drain 280 are not cut to separate from each other and the anode 40 of the organic light-emitting diode is directly connected to the low-temperature poly-silicon layer 24 , so that the distance between two adjacent switching thin-film transistors can be effectively reduced, thereby effectively reducing the pixel area, increasing the number of pixels in a unit area (each inch), and improving the resolution of a panel using the anode connection structure of the organic light-emitting diode.
- the electrically conductive layer comprises one of an indium tin oxide layer, an indium zinc oxide layer, an aluminum layer, a silver layer, and a molybdenum layer or a lamination thereof.
- an isolation layer 29 can be further arranged between the substrate 22 and the low-temperature poly-silicon layer 24 to prevent impurities from spreading to the thin-film transistor 20 to cause malfunctioning of the thin-film transistor 20 .
- the present invention provides an anode connection structure of an organic light-emitting diode and a manufacturing method thereof, wherein the anode of the organic light-emitting diode is directly connected to a low-temperature poly-silicon layer of a thin-film transistor without interconnection therebetween achieved with a source/drain metal layer so as to effectively reduce the distance between two adjacent switching thin-film transistors, thereby effectively reducing the pixel area, increasing the number of pixels in a unit area (each inch), and improving the resolution of a panel using the anode connection structure of the organic light-emitting diode.
Abstract
Description
- This is a divisional application of co-pending patent application Ser. No. 14/008,607, “Anode Connection Structure of Organic Light-Emitting Diode and Manufacturing Method Thereof”, filed on Sep. 30, 2013.
- 1. Field of the Invention
- The present invention relates to the field of light-emitting diodes, and in particular to an anode connection structure of an organic light-emitting diode and a manufacturing method thereof.
- 2. The Related Arts
- An organic light-emitting diode display (OLED), which is also referred to as an organic electroluminescent diode, is a novel displaying technology of which the development was dated back to the middle of the 20th century. The organic electroluminescent diode has various advantages over a liquid crystal display, such as being fully solid state, active emission of light, high brightness, high contrast, being ultra thin, low cost, low power consumption, fast response, wide view angle, wide range of operation temperature, and being capable of flexible displaying. The structure of an organic electroluminescent diode generally comprises a substrate, an anode, a cathode, and an organic function layer and the principle of light emission thereof is that multiple layers of organic materials that are of extremely small thickness is formed between the anode and the cathode through vapor deposition, whereby positive and negative carriers, when injected into the organic semiconductor films, re-combine with each other to generate light. The organic function layer of the organic electroluminescent diode is generally made up of three function layers, which are respectively a hole transport layer (HTL), an emissive layer (EML), and an electron transport layer (ETL). Each of the function layers can be a single layer or more than one layer. For example, the hole transport layer may sometimes be further divided into a hole injection layer and a hole transport layer and the electron transport layer may also be divided into an electron transport layer and an electron injection layer. However, they are of substantially the same function and are thus collectively referred to as the hole transport layer and the electron transport layer.
- Currently, the manufacture of a full-color organic electroluminescent diode is generally done with three methods, which are RGB juxtaposition and individual emission method, white light in combination with color filter method, and color conversion method, among which the RGB juxtaposition and individual emission method is most promising and has the most practical applications. The manufacturing method thereof is that red, green, and blue use different subject and object light-emitting materials.
- The organic light-emitting diodes can be classified in two types, according to the method of driving, which are active driving and passive driving, namely direct addressing and TFT (Thin-Film Transistor) matrix addressing. The active driving type organic light-emitting diode is the so called active matrix organic light emitting device (AMOLED).
- The AMOLED has a pixel circuit and a compensation circuit that are much more complicated than those of a liquid crystal display (LCD) and thus, for the conventional AMOLED products, the available number of pixels per inch (PPI) is less than 280, rendering the resolution relatively low.
- Referring to
FIGS. 1 and 2 , schematic views are given to show a conventional anode connection structure of an organic light-emitting diode. Ananode 100 is electrically connected to a low-temperature poly-silicon layer 50 by driving the source/drain terminal 300 of the thin-film transistor. Due to the arrangement of a metal layer of the source/drain terminal 300, the distance between switching thin-film transistors on the two sides is increased, whereby the area of the pixel is relatively large and thus the number of pixels per inch is reduced, leading to a relatively low resolution. - An object of the present invention is to provide an anode connection structure of an organic light-emitting diode, which has a simple structure, a low cost, a small pixel area, and a high resolution.
- Another object of the present invention is to provide a manufacturing method of an anode connection structure of an organic light-emitting diode, which has a simply manufacturing process and can effectively reduce a pixel area and improve resolution.
- To achieve the objects, the present invention provides an anode connection structure of an organic light-emitting diode, which comprises: a thin-film transistor and an anode of an organic light-emitting diode arranged on the thin-film transistor. The thin-film transistor comprises a low-temperature poly-silicon layer formed on a substrate, a gate insulation layer formed on the low-temperature poly-silicon layer, a gate formed on the gate insulation layer, a protection layer formed on the gate, and a source/drain formed on the protection layer. The anode of the organic light-emitting diode is connected to the low-temperature poly-silicon layer.
- A planarization layer is arranged between the thin-film transistor and the anode of the organic light-emitting diode.
- The substrate comprises a glass substrate.
- An isolation layer is formed between the substrate and the low-temperature poly-silicon layer.
- The anode of the organic light-emitting diode comprises one of an indium tin oxide layer, an indium zinc oxide layer, an aluminum layer, a silver layer, and a molybdenum layer or a lamination thereof.
- The present invention also provides an anode connection structure of an organic light-emitting diode, which comprises: a thin-film transistor and an anode of an organic light-emitting diode arranged on the thin-film transistor, the thin-film transistor comprising a low-temperature poly-silicon layer formed on a substrate, a gate insulation layer formed on the low-temperature poly-silicon layer, a gate formed on the gate insulation layer, a protection layer formed on the gate, and a source/drain formed on the protection layer, the anode of the organic light-emitting diode being connected to the low-temperature poly-silicon layer;
- wherein a planarization layer is arranged between the thin-film transistor and the anode of the organic light-emitting diode.
- The substrate comprises a glass substrate.
- An isolation layer is formed between the substrate and the low-temperature poly-silicon layer.
- The anode of the organic light-emitting diode comprises one of an indium tin oxide layer, an indium zinc oxide layer, an aluminum layer, a silver layer, and a molybdenum layer or a lamination thereof.
- The present invention further provides a manufacture method of an anode connection structure of an organic light-emitting diode, which comprises the following steps:
- (1) providing a substrate, wherein the substrate comprises a thin-film transistor formed thereon;
- (2) forming a planarization layer on the thin-film transistor;
- (3) forming a hole in the planarization layer and the thin-film transistor to expose the low-temperature poly-silicon layer of the thin-film transistor; and
- (4) forming an electrically conductive layer on the planarization layer and the exposed low-temperature poly-silicon layer and patternizing the electrically conductive layer to form a new source/drain on the low-temperature poly-silicon layer and also forming an anode of an organic light-emitting diode on the planarization layer, the anode of the organic light-emitting diode being connected to the new source/drain.
- The thin-film transistor comprises the low-temperature poly-silicon layer that is formed on the substrate, a gate insulation layer formed on the low-temperature poly-silicon layer, a gate formed on the gate insulation layer, a protection layer formed on the gate, and a source/drain formed on the protection layer.
- The substrate comprises a glass substrate.
- An isolation layer is arranged between the substrate and the low-temperature poly-silicon layer.
- The electrically conductive layer comprises one of an indium tin oxide layer, an indium zinc oxide layer, an aluminum layer, a silver layer, and a molybdenum layer or a lamination thereof.
- The efficacy of the present invention is that the present invention provides an anode connection structure of an organic light-emitting diode and a manufacturing method thereof, wherein the anode of the organic light-emitting diode is directly connected to a low-temperature poly-silicon layer of a thin-film transistor without interconnection therebetween achieved with a source/drain metal layer so as to effectively reduce the distance between two adjacent switching thin-film transistors, thereby effectively reducing the pixel area, increasing the number of pixels in a unit area (each inch), and improving the resolution of a panel using the anode connection structure of the organic light-emitting diode.
- For better understanding of the features and technical contents of the present invention, reference will be made to the following detailed description of the present invention and the attached drawings. However, the drawings are provided for the purposes of reference and illustration and are not intended to impose undue limitations to the present invention.
- The technical solution, as well as beneficial advantages, of the present invention will be apparent from the following detailed description of an embodiment of the present invention, with reference to the attached drawings. In the drawings:
-
FIG. 1 is a schematic view showing the structure of a conventional anode connection structure of an organic light-emitting diode; -
FIG. 2 is a top plan view of the conventional anode connection structure of the organic light-emitting diode; -
FIG. 3 is a schematic view showing the structure of an anode connection structure of an organic light-emitting diode according to the present invention; -
FIG. 4 is a top plan view of the anode connection structure of the organic light-emitting diode according to the present invention; and -
FIG. 5 is a flow chart illustrating a manufacturing method of an anode connection structure of an organic light-emitting diode according to the present invention. - To further expound the technical solution adopted in the present invention and the advantages thereof, a detailed description is given to a preferred embodiment of the present invention and the attached drawings.
- Referring to
FIGS. 3 and 4 , the present invention provides an anode connection structure of an organic light-emitting diode, which comprises: a thin-film transistor 20 and ananode 40 of an organic light-emitting diode arranged on the thin-film transistor 20. The thin-film transistor 20 comprises a low-temperature poly-silicon layer 24 formed on asubstrate 22, a gate insulation (GI)layer 26 formed on the low-temperature poly-silicon layer 24, a gate (not shown) formed on thegate insulation layer 26, a protection layer (ILD) 27 formed on the gate, and a source/drain (SD) 28 formed on theprotection layer 27. Theanode 40 of the organic light-emitting diode is directly connected to the low-temperature poly-silicon layer 24 in order to reduce the distance between two adjacent switching thin-film transistors and thus effectively reducing the pixel area, increasing the number of pixels in a unit area (each inch), and improving the resolution of a panel using the anode connection structure of the organic light-emitting diode. - The thin-
film transistor 20 comprises a switching thin-film transistor and a driving thin-film transistor. Theanode 40 of the organic light-emitting diode is connected to the low-temperature poly-silicon layer 24 of the driving thin-film transistor. - Further arranged between the thin-
film transistor 20 and theanode 40 of the organic light-emitting diode is aplanarization layer 60, which avoids influence of displaying performance caused by corrosion and breaking resulting from impurities contained in theanode 40 of the organic light-emitting diode. - Specifically, the
substrate 22 is a glass substrate and theanode 40 of the organic light-emitting diode comprises one of an indium tin oxide (ITO) layer, an indium zinc oxide (IZO) layer, an aluminum (Al) layer, a silver (Ag) layer, and a molybdenum (Mo) layer or a lamination thereof. - It is noted that an
isolation layer 29 is further arranged between thesubstrate 22 and the low-temperature poly-silicon layer 24 to prevent impurities from spreading to the thin-film transistor 20 to cause malfunctioning of the thin-film transistor 20. - Referring to
FIG. 5 , with collaborative reference toFIGS. 3 and 4 , the present invention further provides a manufacturing method of an anode connection structure of an organic light-emitting diode, which comprises the following steps: - Step 1: providing a
substrate 22, wherein thesubstrate 22 comprises a thin-film transistor 20 formed thereon. - The
substrate 22 is a glass substrate. The thin-film transistor 20 comprises a low-temperature poly-silicon layer 24 formed on thesubstrate 22, agate insulation layer 26 formed on the low-temperature poly-silicon layer 24, a gate formed on thegate insulation layer 26, aprotection layer 27 formed on the gate, and a source/drain 28 formed on theprotection layer 27. - The thin-
film transistor 20 comprises a switching thin-film transistor and a driving thin-film transistor. - Step 2: forming a
planarization layer 60 on the thin-film transistor 20. - The
planarization layer 60 functions to avoid influence of displaying performance caused by corrosion and breaking resulting from impurities contained in theanode 40 of the organic light-emitting diode. - Step 3: forming a hole in the
planarization layer 60 and the thin-film transistor 20 to expose the low-temperature poly-silicon layer 24 of the thin-film transistor 20. - Specifically, a masking process is applied to form a hole in the
planarization layer 60 and the driving thin-film transistor at a location corresponding to the source/drain 28 in order to expose the metal layer that serves as the source/drain 28; and then, the metal layer of the source/drain 28 is etched off to expose the low-temperature poly-silicon layer 24 located thereunder. - Step 4: forming an electrically conductive layer on the
planarization layer 60 and the exposed low-temperature poly-silicon layer 24 and patternizing the electrically conductive layer to form a new source/drain 280 on the low-temperature poly-silicon layer 24 thereby completing the entirety of the driving thin-film transistor, and at the same time, forming ananode 40 of the organic light-emitting diode on theplanarization layer 60. Since the new source/drain 280 and theanode 40 of the organic light-emitting diode are both formed of the electrically conductive layer, in the manufacture process, theanode 40 of the organic light-emitting diode and the new source/drain 280 are not cut to separate from each other and theanode 40 of the organic light-emitting diode is directly connected to the low-temperature poly-silicon layer 24, so that the distance between two adjacent switching thin-film transistors can be effectively reduced, thereby effectively reducing the pixel area, increasing the number of pixels in a unit area (each inch), and improving the resolution of a panel using the anode connection structure of the organic light-emitting diode. - In the instant embodiment, the electrically conductive layer comprises one of an indium tin oxide layer, an indium zinc oxide layer, an aluminum layer, a silver layer, and a molybdenum layer or a lamination thereof.
- It is noted that an
isolation layer 29 can be further arranged between thesubstrate 22 and the low-temperature poly-silicon layer 24 to prevent impurities from spreading to the thin-film transistor 20 to cause malfunctioning of the thin-film transistor 20. - In summary, the present invention provides an anode connection structure of an organic light-emitting diode and a manufacturing method thereof, wherein the anode of the organic light-emitting diode is directly connected to a low-temperature poly-silicon layer of a thin-film transistor without interconnection therebetween achieved with a source/drain metal layer so as to effectively reduce the distance between two adjacent switching thin-film transistors, thereby effectively reducing the pixel area, increasing the number of pixels in a unit area (each inch), and improving the resolution of a panel using the anode connection structure of the organic light-emitting diode.
- Based on the description given above, those having ordinary skills of the art may easily contemplate various changes and modifications of the technical solution and technical ideas of the present invention and all these changes and modifications are considered within the protection scope of right for the present invention.
Claims (5)
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CN201310386378.5A CN103413898B (en) | 2013-08-29 | 2013-08-29 | Organic Light Emitting Diode anode syndeton and preparation method thereof |
PCT/CN2013/082954 WO2015027532A1 (en) | 2013-08-29 | 2013-09-04 | Organic light emitting diode anode connection structure and manufacturing method thereof |
US14/008,607 US9117780B2 (en) | 2013-08-29 | 2013-09-04 | Anode connection structure of organic light-emitting diode and manufacturing method thereof |
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CN111063823A (en) * | 2019-12-09 | 2020-04-24 | 武汉华星光电半导体显示技术有限公司 | Organic light emitting diode display panel |
US11903276B2 (en) | 2019-11-20 | 2024-02-13 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Display panel, manufacturing method therefor, and display device |
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US20070176170A1 (en) * | 2006-01-27 | 2007-08-02 | Industrial Technology Research Institute | Organic light-emitting device with integrated color filter and method for manufacturing the same |
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KR100543005B1 (en) | 2003-09-18 | 2006-01-20 | 삼성에스디아이 주식회사 | active matrix organic electroluminescence display |
CN101131958B (en) | 2006-08-25 | 2011-08-24 | 中华映管股份有限公司 | Manufacturing method for pixel structure of organic electricity-stimulated lighting display apparatus |
KR100787461B1 (en) | 2006-11-10 | 2007-12-26 | 삼성에스디아이 주식회사 | Organic light emitting display apparatus employing multi-layered anode |
KR101155903B1 (en) | 2010-03-09 | 2012-06-21 | 삼성모바일디스플레이주식회사 | Organic light emitting diode display and method for manufacturing the same |
KR101822563B1 (en) | 2010-12-08 | 2018-03-09 | 삼성디스플레이 주식회사 | Organic light emitting display device and manufacturing method of the same |
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US20070176170A1 (en) * | 2006-01-27 | 2007-08-02 | Industrial Technology Research Institute | Organic light-emitting device with integrated color filter and method for manufacturing the same |
US20140166996A1 (en) * | 2012-12-14 | 2014-06-19 | Samsung Display Co., Ltd. | Organic light-emitting display apparatus and method of manufacturing the same |
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US11903276B2 (en) | 2019-11-20 | 2024-02-13 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Display panel, manufacturing method therefor, and display device |
CN111063823A (en) * | 2019-12-09 | 2020-04-24 | 武汉华星光电半导体显示技术有限公司 | Organic light emitting diode display panel |
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