WO2015024318A1 - 像素单元及其制造方法、阵列基板和显示装置 - Google Patents
像素单元及其制造方法、阵列基板和显示装置 Download PDFInfo
- Publication number
- WO2015024318A1 WO2015024318A1 PCT/CN2013/088044 CN2013088044W WO2015024318A1 WO 2015024318 A1 WO2015024318 A1 WO 2015024318A1 CN 2013088044 W CN2013088044 W CN 2013088044W WO 2015024318 A1 WO2015024318 A1 WO 2015024318A1
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- WIPO (PCT)
- Prior art keywords
- insulating layer
- hole
- thin film
- film transistor
- via hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136227—Through-hole connection of the pixel electrode to the active element through an insulation layer
-
- 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
- H10D86/0231—Manufacture or treatment of multiple TFTs using masks, e.g. half-tone masks
-
- 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
- H10D86/40—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
- H10D86/443—Interconnections, e.g. scanning lines adapted for preventing breakage, peeling or short circuiting
-
- 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
- H10D86/40—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
-
- 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
- H10D86/40—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
Definitions
- the present invention relates to the field of display technologies, and in particular, to a pixel unit and a method of fabricating the same, an array substrate including the pixel unit, and a display device including the array substrate. Background technique
- the display device (for example, a liquid crystal panel) includes an array substrate, and the array substrate generally includes a plurality of pixel units.
- FIG. 1 is a schematic diagram of a pixel unit structure of a common array substrate.
- the pixel unit of the array substrate includes at least a thin film transistor 100' and a pixel electrode 200.
- the thin film transistor 100' includes at least a source 110, a drain 120, and a gate 130.
- the pixel electrode 200 passes through the via 300'.
- the organic insulating layer 140 is usually provided as a flat layer over the source 110 and the drain 120 of the thin film transistor 100'.
- the larger the thickness of the organic insulating layer 140 the smaller the parasitic capacitance.
- an increase in the thickness of the organic insulating layer causes an increase in the axial height of the via 300', and the larger the axial height of the via 300', the more easily the pixel electrode 200 breaks at the junction with the via 300'.
- An object of the present invention is to provide a pixel unit and a method of fabricating the same, an array substrate including the pixel unit, and a display device including the array substrate.
- the pixel electrode is not easily broken at the junction with the via.
- a pixel unit including a thin film transistor and a pixel electrode including a thin film transistor and a pixel electrode, the thin film transistor including a gate is provided a pole, a source and a drain, the pixel electrode being electrically connected to the drain through a via, and an upper end surface of the via is connected to the pixel electrode, a lower end surface of the via and the drain
- the pole connection is a stepped hole, and an area of the upper end surface of the via hole is larger than an area of the lower end surface of the via hole.
- the thin film transistor further includes an organic insulating layer disposed over a source and a drain of the thin film transistor, the via hole penetrating the organic insulating layer.
- the thin film transistor further includes an inorganic insulating layer disposed between the organic insulating layer and a source and a drain of the thin film transistor, and the via penetrates through the inorganic insulating layer.
- the via hole includes a large hole portion and a small hole portion, a part of the small hole portion and the large hole portion are disposed in the organic insulating layer, and another portion of the small hole portion is disposed in the In the inorganic insulating layer.
- the organic insulating layer is made of a photosensitive resin, and an etching selectivity ratio of the inorganic insulating layer to the organic insulating layer is not less than 10.
- a method of manufacturing a pixel unit comprising the steps of:
- the step of forming a thin film transistor comprises:
- the organic insulating layer is made of a photosensitive resin material, and an etching selectivity ratio of the inorganic insulating layer to the organic insulating layer is not less than 10, and the step of forming a via hole includes:
- the via hole includes a large hole portion and a small hole portion
- the organic insulating layer is made of a non-photosensitive resin material
- the patterning process is first formed through the An organic insulating layer and a first hole of the inorganic insulating layer, the first hole has a cross-sectional area identical to that of the small hole portion; after the first hole is formed, the large hole portion is formed by a patterning process.
- the pixel electrode is formed by a method of inkjet printing.
- the manufacturing method further includes:
- the thin film transistor is annealed at an annealing temperature of 200 ° C to 600 ° C and an annealing holding time of 30 min to 3 h.
- an array substrate is provided, wherein the array substrate includes the above-described pixel unit provided by the embodiment of the present invention.
- a display device comprising an array substrate, wherein the array substrate is the array substrate provided by the embodiment of the present invention.
- the via hole is a stepped hole, and the upper end surface of the larger cross-sectional area of the via hole is connected to the pixel electrode, the pixel electrode can be formed with the upper end surface of the via hole. Good contact prevents the pixel electrode from breaking at the junction with the via.
- the pixel unit provided by the embodiment of the present invention not only has a small parasitic capacitance, but also the pixel electrode of the array substrate is not easily broken.
- FIG. 1 is a schematic structural diagram of a pixel unit of an array substrate in the prior art
- FIG. 2 is a schematic structural diagram of a pixel unit according to an embodiment of the present invention
- FIG. 3 is another embodiment of a pixel unit according to an embodiment of the present invention
- a schematic diagram of the structure and
- FIGS. 5a to 5i are diagrams illustrating a method of fabricating a pixel unit according to an embodiment of the present invention. Description of the reference numerals
- active layer 170 gate insulating layer
- an aspect of the present invention provides a pixel unit including a thin film transistor 100 and a pixel electrode 200, and the thin film transistor 100 includes a gate electrode.
- the pixel electrode 200 is electrically connected to the drain 120 through the via 300, and the upper end surface of the via 300 is connected to the pixel electrode 200, and the lower end surface of the via 300 and the thin film transistor 100 are drained.
- the poles 120 are connected, wherein the via 300 is a stepped hole, and the area of the upper end surface of the via 300 is larger than the area of the lower end of the via 300.
- a thick organic insulating layer 140 is usually disposed above the source 110 and the drain 120 of the thin film transistor 100.
- the via 300 penetrates the organic insulating layer 140 to reach the drain 120.
- the via hole 300 is set as a stepped hole, and the upper end surface of the via hole 300 having a large cross section is connected to the pixel electrode 200.
- the pixel electrode 200 can form a good contact with the upper end surface of the via hole 300, so that the pixel electrode 200 can be prevented from being broken at the connection with the via hole 300. .
- the via 300 can ensure the electrical connection between the pixel electrode 200 and the drain 120 of the thin film transistor 100, and can increase the pixel electrode 200 and the via 300.
- the thin film transistor 100 may further include a gate electrode 130, an active layer 160, a gate insulating layer 170, and an ohmic contact layer 180.
- an oxide of silicon (SiO x ), a nitride of silicon (SiN x ), an oxide of hafnium (HfO x ), an oxide of silicon (SiON), an oxide of aluminum may be utilized.
- One or more of ( ⁇ 1 ⁇ ⁇ ) and the like form the gate insulating layer 170.
- the gate insulating layer 170 may have a single layer structure formed of one of the above materials, or may have a stacked structure formed of several of the above materials.
- the gate insulating layer 170 may be a stacked structure of SiN x /SiO x or a stacked structure of SiN x /SiON/SiO x .
- the thickness of the gate insulating layer 170 is between 300 nm and 600 nm.
- the gate insulating layer 170 can be formed by PECVD (Plasma Enhanced Chemical Vapor Deposition).
- the position and structure of the ohmic contact layer 180 are also not particularly limited as long as they are in direct contact with the active layer 160.
- the ohmic contact layer 180 may be located on the upper surface of the active layer 160 and between the source 110 and the drain 120.
- the ohmic contact layer 180 may be located on the upper surfaces of both sides of the active layer 160, and the source 110 and the drain 120 are respectively covered.
- the shape of the cross section of the via hole 300 is not limited, that is, the cross section of the via hole 300 may be circular, or may be elliptical or square.
- the thin film transistor 100 may further include an inorganic insulating layer 150 disposed at a source of the thin film transistor 100.
- the organic insulating layer 140 is disposed above the inorganic insulating layer 150, and the inorganic insulating layer 150 is disposed between the organic insulating layer 140 and the source 110 and the drain 120 of the thin film transistor 100.
- the via 300 passes through the inorganic insulating layer 150 and the organic insulating layer 140.
- a portion of the small hole portion 320 and the large hole portion 310 are disposed in the organic insulating layer 140, and another portion of the small hole portion 320 is disposed in the inorganic insulating layer 150.
- the material of the inorganic insulating layer 150 is also not particularly limited.
- the inorganic insulating layer 150 may be oxidized by silicon oxide (SiO x ), silicon nitride (SiN x ), germanium.
- the inorganic insulating layer 150 may be a multilayer structure formed of any of the above materials.
- the inorganic insulating layer 150 may have a thickness of between 300 nm and 600 nm.
- the organic insulating layer 140 may be formed using a resin material.
- the resin material may be a photosensitive resin material or a non-photosensitive resin material.
- the organic insulating layer 140 made of a photosensitive resin material has properties similar to those of the photoresist.
- the organic insulating layer 140 can be used as an etch barrier layer of the inorganic insulating layer 150, thereby reducing one pattern etching. Process. In the following, how to use the organic insulating layer 140 as an etching barrier layer of the inorganic insulating layer 150 will be described in detail, which will not be described herein.
- Step 10 forming a thin film transistor 100 (Fig. 5a to Fig. 5g);
- Step 11 Form the source 110 and the drain 120 of the thin film transistor 100 (FIG. 5e); Step 12, form an inorganic insulating layer 150 over the source 110 and the drain 120 (Fig.
- An organic insulating layer 140 is formed on the inorganic insulating layer 150 (Fig. 5g).
- the inorganic insulating layer 150 may be silicon oxide (SiO x), silicon nitride (SiN x), hafnium oxide (HfO x), aluminum oxide ( ⁇ 1 ⁇ ⁇ ) of any one of A single layer structure formed.
- the inorganic insulating layer 150 may be a multilayer structure formed of any of the above materials.
- the inorganic insulating layer 150 can be formed by PECVD.
- the formation of the organic insulating layer 140 can reduce the parasitic capacitance, and the formation of the inorganic insulating layer 150 can prevent the moisture absorbed by the organic insulating layer 140 from collecting on the source 110 and the drain 120 of the thin film transistor 100.
- the organic insulating layer 140 can be formed using a PECVD technique.
- the step 10 of forming the thin film transistor 100 further includes: a step of providing a substrate; a step of forming a gate 130 on the substrate (FIG. 5a); forming a gate a step of forming a gate insulating layer 170 on the substrate of the pole 130 (FIG. 5b); a step of forming the active layer 160 on the gate insulating layer 170 (FIG. 5c); a step of forming the ohmic contact layer 180 on the active layer 160 (FIG. 5) 5d).
- the via 300 includes a large hole portion 310 and a small hole portion 320.
- the axial height of the large hole portion 310 is the same as the axial height of the small hole portion 320, so that the through hole 300 can be prevented from being broken at the step where the large hole portion 310 and the small hole portion 320 are joined.
- Step 21 placing a mask above the organic insulating layer 140, for organic insulation
- the layer 140 is exposed.
- the mask includes an opaque region, a light transmissive region, and a semi-transmissive region.
- the light transmissive region corresponds to the small hole portion 320
- the semi-transmissive region corresponds to the large hole portion 310.
- the light transmitting region penetrates the thickness direction of the mask, and the thickness of the semi-transmissive region is smaller than the thickness of the light transmitting region.
- Step 22 Developing the organic insulating layer 140, and then etching the developed organic insulating layer and the inorganic insulating layer 150 to form via holes 300 passing through the organic insulating layer 140 and the inorganic insulating layer 150.
- the etchant may etch away the denatured portion of the organic insulating layer 140, and BP etches away the portion of the organic insulating layer 140 corresponding to the large hole portion 310, thereby forming the large hole portion 310, and the inorganic insulating layer 150
- the portion corresponding to the small hole portion 320 is in direct contact with the etching liquid, and is etched away by the etching liquid, thereby finally forming the small hole portion 320.
- the light transmitting region described herein corresponds to the small hole portion 320, that is, the position of the light transmitting region corresponds to the position of the small hole portion 320, and the horizontal portion of the light transmitting portion
- the cross-sectional area corresponds to the cross-sectional area of the small hole portion 320.
- the semi-transmissive region corresponds to the large hole portion 310, which means that the position of the semi-transmissive region corresponds to the position of the large hole portion 310, and the cross-sectional area of the semi-transmissive region is large.
- the cross-sectional area of the hole portion 310 corresponds.
- the via hole 300 as a stepped hole, it is possible to prevent the pixel electrode 200 from being broken at the junction with the via hole 300.
- a pixel electrode layer may be deposited over the organic insulating layer 140 by a deposition method, and then the pixel electrode 200 is formed by a patterning process.
- the manufacturing method provided by the embodiment of the present invention may further include: Step 40: annealing the thin film transistor, the annealing temperature is 200 ° C to 600 ° C, annealing heat preservation time It is 30min ⁇ 3h.
- an array substrate comprising at least one of the above pixel units provided by the embodiments of the present invention.
- the array substrate comprising at least one of the above pixel units provided by the embodiments of the present invention.
- all the pixel units on the array substrate are the pixel units provided by the embodiments of the present invention.
- a display device comprising an array substrate, wherein the array substrate is the array substrate provided by the embodiment of the present invention.
- the via hole 300 connecting the pixel electrode 200 and the drain electrode 120 of the thin film transistor 100 is a stepped hole, which allows the organic insulating layer to have a large thickness and prevents the pixel electrode 200 from being in the via hole 300. The joint breaks.
- the display device provided by the embodiment of the present invention may further include a color filter substrate disposed opposite to the array substrate.
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Thin Film Transistor (AREA)
- Liquid Crystal (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/361,700 US9508755B2 (en) | 2013-08-22 | 2013-11-28 | Pixel unit and method of fabricating the same, array substrate and display device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310370056.1A CN103456740B (zh) | 2013-08-22 | 2013-08-22 | 像素单元及其制造方法、阵列基板和显示装置 |
| CN201310370056.1 | 2013-08-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015024318A1 true WO2015024318A1 (zh) | 2015-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| PCT/CN2013/088044 Ceased WO2015024318A1 (zh) | 2013-08-22 | 2013-11-28 | 像素单元及其制造方法、阵列基板和显示装置 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US9508755B2 (zh) |
| CN (1) | CN103456740B (zh) |
| WO (1) | WO2015024318A1 (zh) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6135427B2 (ja) * | 2013-09-27 | 2017-05-31 | 凸版印刷株式会社 | 薄膜トランジスタアレイおよびその製造方法 |
| CN104062794B (zh) * | 2014-06-10 | 2016-09-21 | 深圳市华星光电技术有限公司 | 掩膜板以及紫外线掩膜板、阵列基板的制造方法 |
| CN104698630B (zh) * | 2015-03-30 | 2017-12-08 | 合肥京东方光电科技有限公司 | 阵列基板及显示装置 |
| CN104952934B (zh) * | 2015-06-25 | 2018-05-01 | 京东方科技集团股份有限公司 | 薄膜晶体管及制造方法、阵列基板、显示面板 |
| CN105047677B (zh) * | 2015-09-09 | 2017-12-12 | 京东方科技集团股份有限公司 | 显示基板及其制作方法和显示装置 |
| CN105355630A (zh) | 2015-10-10 | 2016-02-24 | 深圳市华星光电技术有限公司 | 阵列基板和包含其的液晶显示器 |
| CN105259723B (zh) * | 2015-11-24 | 2017-04-05 | 武汉华星光电技术有限公司 | 用于液晶面板的阵列基板及其制作方法 |
| CN105514125B (zh) * | 2016-02-02 | 2019-07-12 | 京东方科技集团股份有限公司 | 一种阵列基板、其制备方法及显示面板 |
| CN105589274B (zh) * | 2016-03-11 | 2019-03-26 | 厦门天马微电子有限公司 | 掩膜板、阵列基板、液晶显示装置及形成通孔的方法 |
| CN107996002A (zh) * | 2016-12-30 | 2018-05-04 | 深圳市柔宇科技有限公司 | 阵列基板及阵列基板制造方法 |
| WO2018180842A1 (ja) | 2017-03-29 | 2018-10-04 | シャープ株式会社 | Tft基板、tft基板の製造方法、表示装置 |
| CN107170749B (zh) * | 2017-04-27 | 2020-03-24 | 上海天马微电子有限公司 | 一种阵列基板及其制作方法 |
| US10964705B2 (en) * | 2018-09-10 | 2021-03-30 | Semiconductor Components Industries, Llc | Method of forming a semiconductor device |
| CN208908224U (zh) * | 2018-10-16 | 2019-05-28 | 合肥鑫晟光电科技有限公司 | 一种显示基板、显示装置 |
| CN109509780B (zh) * | 2018-12-12 | 2020-09-22 | 合肥鑫晟光电科技有限公司 | 一种显示面板及其制备方法、显示装置 |
| CN109755260A (zh) * | 2018-12-24 | 2019-05-14 | 惠科股份有限公司 | 一种显示面板、显示面板的制造方法和显示装置 |
| CN110416233A (zh) * | 2019-08-30 | 2019-11-05 | 合肥鑫晟光电科技有限公司 | 阵列基板、显示面板及阵列基板的制作方法 |
| CN115548027B (zh) * | 2021-06-30 | 2026-04-03 | 成都辰显光电有限公司 | 一种驱动背板以及显示面板 |
| CN114464629B (zh) * | 2022-01-21 | 2025-11-21 | 武汉华星光电半导体显示技术有限公司 | 显示面板及显示面板的制备方法 |
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- 2013-08-22 CN CN201310370056.1A patent/CN103456740B/zh active Active
- 2013-11-28 WO PCT/CN2013/088044 patent/WO2015024318A1/zh not_active Ceased
- 2013-11-28 US US14/361,700 patent/US9508755B2/en active Active
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| US20050007508A1 (en) * | 2003-07-09 | 2005-01-13 | Kazunari Saitou | Display device having an improved through-hole connection |
| JP2006215062A (ja) * | 2005-02-01 | 2006-08-17 | Sharp Corp | 液晶表示パネル、液晶表示装置、および液晶表示パネルの製造方法 |
| JP2010079152A (ja) * | 2008-09-29 | 2010-04-08 | Seiko Epson Corp | 電気光学装置及び電子機器 |
| CN103389605A (zh) * | 2012-05-09 | 2013-11-13 | 株式会社日本显示器东 | 显示装置 |
| CN102969311A (zh) * | 2012-11-27 | 2013-03-13 | 京东方科技集团股份有限公司 | 阵列基板及其制作方法、显示装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| US9508755B2 (en) | 2016-11-29 |
| CN103456740B (zh) | 2016-02-24 |
| US20150129881A1 (en) | 2015-05-14 |
| CN103456740A (zh) | 2013-12-18 |
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