WO2016029542A1 - 阵列基板及显示装置 - Google Patents

阵列基板及显示装置 Download PDF

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WO2016029542A1
WO2016029542A1 PCT/CN2014/089920 CN2014089920W WO2016029542A1 WO 2016029542 A1 WO2016029542 A1 WO 2016029542A1 CN 2014089920 W CN2014089920 W CN 2014089920W WO 2016029542 A1 WO2016029542 A1 WO 2016029542A1
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gate
array substrate
active layer
drain
source
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PCT/CN2014/089920
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French (fr)
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陈鹏
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京东方科技集团股份有限公司
合肥鑫晟光电科技有限公司
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Publication of WO2016029542A1 publication Critical patent/WO2016029542A1/zh

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    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K77/00Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10OLED displays
    • H10K59/12Active-matrix OLED [AMOLED] displays

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  • Embodiments of the present invention relate to an array substrate and a display device.
  • OLED Organic Light-Emitting Diode
  • PMOLED Passive Matrix Organic Light-Emitting Diode
  • AMOLED Active Matrix Organic Light-Emitting Diode
  • the AMOLED display device includes a plurality of pixels arranged in an array, each of which includes a shielding portion and a light transmitting portion, and the shielding portion needs to block the wiring of the pixel and the opaque component such as a TFT (Thin Film Transistor).
  • the light passing through the light is transparent.
  • the ratio of the area of the light-transmitting portion to the entire pixel area is the aperture ratio of the pixel, and the higher the aperture ratio, the higher the display brightness of the display device.
  • a plurality of TFTs (at least two, generally more than three) are usually disposed in each pixel, causing an increase in the area of the occlusion portion of the pixel. Large, the area of the light-transmitting portion is reduced, resulting in a decrease in the pixel aperture ratio and a decrease in display brightness.
  • an array substrate comprising: a plurality of gate lines along a first direction; a plurality of data lines along a second direction, the second direction being perpendicular to the first direction
  • the data line intersects the gate line to form a plurality of pixel regions; wherein each pixel region includes a thin film transistor, the thin film transistor includes: a gate, an active layer, a source and a drain; and the gate
  • the forming material is a transparent conductive material
  • the forming material of the active layer is a transparent oxide semiconductor material material.
  • a display device comprising the above array substrate.
  • an array substrate comprising:
  • a pattern including a gate and a gate line on the substrate
  • a gate insulating layer covering the foregoing pattern including a gate electrode and a gate line;
  • the forming material of the gate is a transparent conductive material, and the forming material of the active layer is a transparent oxide semiconductor material.
  • FIG. 1 is a cross-sectional view of an array substrate according to an embodiment of the present invention.
  • FIG. 2 is a plan view of an array substrate according to an embodiment of the present invention.
  • an array substrate including: a plurality of gate lines along a first direction; a plurality of data lines along a second direction, the second direction is perpendicular to the first direction, and the data lines are The gate lines intersect to form a plurality of pixel regions.
  • Each pixel region includes a thin film transistor (TFT), such as As shown in FIGS. 1 and 2, the TFT includes a gate electrode 102, an active layer 104, a source electrode 106, and a drain electrode 107.
  • the forming material of the gate electrode 102 is a transparent conductive material
  • the forming material of the active layer 104 is a transparent oxide semiconductor material.
  • the gate of the TFT is made of a transparent conductive material
  • the active layer is made of a transparent oxide semiconductor material, which greatly improves the light transmittance of the gate electrode and the active layer, so that the overall light transmittance of the TFT is greatly increased.
  • the area of each pixel occlusion portion is increased, the area of the light-transmitting portion is increased, and the pixel aperture ratio is increased.
  • the gate electrode 102 is formed of at least one of indium tin oxide, indium zinc oxide, indium gallium zinc oxide, zinc tin oxide, etc. to ensure that the gate 102 has a small resistance.
  • the gate line 201 is formed of a metal, and the gate line 201 is electrically connected to the gate 102 to apply a gate driving signal to the gate 102 through the gate line 201 to turn on the TFT.
  • the gate line 201 is in the same layer as the gate 102, both of which may be formed using a patterning process, and the gate lines 201 and the gates 102 are formed in different patterning process steps due to different forming materials.
  • the forming material of the active layer 104 may be at least one of materials such as zinc oxide, tin oxide, chromium oxide, aluminum oxide, indium gallium zinc oxide, and the like.
  • the material forming the data line, the source 106, and the drain 107 may be metal to ensure good electrical conductivity.
  • the data line is electrically connected to the source 106 to apply different data signals to the source 106 through the data line, so that the drain 107 outputs different voltage signals, so that the pixel electrodes electrically connected to the drain 107 have different voltages. .
  • the widths of the source 106 and the drain 107 are generally small, and the shielding of the light is blocked by the entire TFT. It is not said that the gate 102 and the active layer 104 of the TFT are the main causes of opaque TFT.
  • the widths of the source 106 and the drain 107 can be appropriately reduced with respect to the width of the known source and drain to further improve the light transmittance of the TFT without affecting the conductivity of the TFT.
  • the width W of the source 106 and the drain 107 in the direction perpendicular to the gate line 201 may be 3 ⁇ m to 5 ⁇ m.
  • the structure of the array substrate is as shown in FIGS. 1 and 2, including a substrate substrate 101; a pattern including a gate electrode 102 and a gate line 201 on the base substrate 101; a gate insulating layer 103 covering the foregoing pattern including the gate electrode 102 and the gate line 201; and an active layer on the gate insulating layer 103 a pattern of the layer 104; a pattern including the etch barrier layer 105 formed after the pattern including the active layer 104, the etch barrier layer 105 having a source contact hole and a drain contact hole exposing the surface of the active layer 104; The source electrode 106 and the drain electrode 107 are formed after the pattern including the etch barrier layer 105.
  • the source electrode 106 is electrically connected to the active layer 104 through the source contact hole, and the drain electrode 107 is electrically connected through the drain contact hole.
  • Layer 104 is electrically connected.
  • the TFT is a bottom gate TFT, and in other embodiments of the present invention, the TFT may also be a top gate TFT.
  • a display device comprising the array substrate provided by the above embodiments.
  • the gate and the active layer of the TFT are transparent elements, so that the light transmittance of the TFT is greatly improved, the aperture area of the pixel is increased, and the aperture ratio of the pixel is improved.
  • the display brightness of the device is enhanced.
  • the display device may be, for example, an OLED display device.
  • the display device further includes an OLED device disposed on the array substrate.
  • the display device provided in this embodiment may be a bottom-emitting AMOLED display device or an ejector optical AMOLED display device.
  • the display device may be a bottom-emitting AMOLED display device.
  • the display device may also be, for example, a liquid crystal display device such as a display, a television, an electronic paper, a mobile phone, a tablet computer, a notebook computer, a digital photo frame, a navigator, or the like, or any product or component having a display function.
  • a liquid crystal display device such as a display, a television, an electronic paper, a mobile phone, a tablet computer, a notebook computer, a digital photo frame, a navigator, or the like, or any product or component having a display function.
  • the gate of the TFT is made of a transparent conductive material
  • the active layer is made of a transparent oxide semiconductor material, so that the light transmittance of the gate electrode and the active layer is greatly improved. Since the TFT is incapable of transmitting light, which is mainly caused by the blocking of the gate electrode and the active layer, the gate electrode and the active layer are formed of a transparent material in the present invention, and the light transmittance of the entire TFT can be greatly improved. The area of the occlusion portion of each pixel is reduced, the pixel aperture ratio is increased, and the display brightness of the device is increased.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electroluminescent Light Sources (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Thin Film Transistor (AREA)

Abstract

一种阵列基板,包括沿第一方向的多条栅极线(201);沿第二方向的多条数据线,第二方向与第一方向相互垂直,数据线与栅极线(201)交叉形成多个像素区域。每个像素区域包括薄膜晶体管,薄膜晶体管包括栅极(102)、有源层(104)、源极(106)和漏极(107)。栅极(102)的形成材料为透明导电材料,且有源层(104)的形成材料为透明氧化物半导体材料。这种阵列基板及显示装置使栅极(102)和有源层(104)的光线透过率大大提高,从而提高了像素开口率,增大了装置的显示亮度。

Description

阵列基板及显示装置 技术领域
本发明实施例涉及一种阵列基板及显示装置。
背景技术
OLED(Organic Light-Emitting Diode,有机发光二极管)显示装置是目前主流的显示器件之一,按照驱动方式的不同,OLED显示装置分为PMOLED(Passive matrix Organic Light-Emitting Diode,无源矩阵有机发光二极管)显示装置和AMOLED(Active Matrix Organic Light-Emitting Diode,有源矩阵有机发光二极管)显示装置两种。相对于PMOLED显示装置,AMOLED显示装置的反应速度更快,适用于各种宽度面板的需求,因而受到广泛的关注。
AMOLED显示装置包括阵列式排布的多个像素,每个像素包括遮挡部分和透光部分,遮挡部分需要对像素的配线、TFT(Thin Film Transistor,薄膜晶体管)等不透光元件进行遮挡,透光部分光线能够透过。透光部分面积占整个像素面积的比例为像素的开口率,开口率越高,显示装置的显示亮度就越高。
为了提高AMOLED显示装置的TFT阵列基板的均匀性,达到较好的显示效果,通常会在每个像素中设置多个TFT(至少为两个,一般大于3个),引起像素的遮挡部分面积增大,透光部分面积减小,导致像素开口率降低,显示亮度下降。
发明内容
根据本发明的第一方面,提供一种阵列基板,包括:沿第一方向的多条栅极线;沿第二方向的多条数据线,所述第二方向与所述第一方向相互垂直,所述数据线与所述栅极线交叉形成多个像素区域;其中每个像素区域包括薄膜晶体管,所述薄膜晶体管包括:栅极、有源层、源极和漏极;所述栅极的形成材料为透明导电材料,且所述有源层的形成材料为透明氧化物半导体材 料。
根据本发明的第二方面,提供一种显示装置,包括上述的阵列基板。
根据本发明的第三方面,提供一种阵列基板,包括:
衬底基板;
位于衬底基板上的包括栅极和栅极线的图形;
覆盖前述包括栅极和栅极线的图形的栅极绝缘层;
位于栅极绝缘层上的包括有源层的图形;
形成于包括有源层的图形之上的包括刻蚀阻挡层的图形,刻蚀阻挡层上具有暴露出有源层表面的源极接触孔和漏极接触孔;
形成于包括刻蚀阻挡层的图形之上的源极和漏极,源极通过源极接触孔与有源层电性相连,漏极通过漏极接触孔与有源层电性相连;
其中所述栅极的形成材料为透明导电材料,且所述有源层的形成材料为透明氧化物半导体材料。
附图说明
为了更清楚地说明本发明实施例的技术方案,下面将对实施例的附图作简单地介绍,显而易见地,下面描述中的附图仅仅涉及本发明的一些实施例,而非对本发明的限制。
图1为本发明实施例所提供的阵列基板的截面图;
图2为本发明实施例所提供的阵列基板的平面图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚,下面将结合本发明实施例的附图,对本发明实施例的技术方案进行清楚、完整地描述。显然,所描述的实施例是本发明的一部分实施例,而不是全部的实施例。基于所描述的本发明的实施例,本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例,都属于本发明保护的范围。
根据本发明的实施例,提供了一种阵列基板,包括:沿第一方向的多条栅极线;沿第二方向的多条数据线,第二方向与第一方向相互垂直,数据线与栅极线交叉形成多个像素区域。每个像素区域包括薄膜晶体管(TFT),如 图1和图2所示,TFT包括:栅极102、有源层104、源极106和漏极107。栅极102的形成材料为透明导电材料,且有源层104的形成材料为透明氧化物半导体材料。
上述阵列基板中,TFT的栅极采用透明导电材料,有源层采用透明氧化物半导体材料,极大地提高了栅极和有源层的光线透过率,从而使TFT整体的光线透过率大大提高,减小了每个像素遮挡部分的面积,增大了透光部分的面积,提高了像素开口率。
在一个示例中,栅极102的形成材料为可为铟锡氧化物、铟锌氧化物、铟镓锌氧化物、锌锡氧化物等中的至少一种,以保证栅极102具有较小的电阻。
在一个示例中,栅极线201的形成材料为金属,且栅极线201与栅极102电性相连,以通过栅极线201向栅极102施加栅极驱动信号,开启TFT。
在一个示例中,栅极线201与栅极102位于同一层中,二者可利用构图工艺形成,且由于形成材料不同,栅极线201与栅极102形成于不同的构图工艺步骤中。
在一个示例中,有源层104的形成材料可为氧化锌、氧化锡、氧化铬、氧化铝、铟镓锌氧化物等材料中的至少一种。
在一个示例中,数据线、源极106和漏极107的形成材料可为金属,以保证具有良好的导电性能。
数据线与源极106电性相连,以通过数据线向源极106施加不同的数据信号,使漏极107输出不同的电压信号,进而使与漏极107电性相连的像素电极具有不同的电压。
需要说明的是,由于源极106与漏极107的作用主要为导电,因此通常情况下源极106与漏极107的宽度较小,二者对光线的遮挡相对于整个TFT对光线的遮挡来说并不大,即TFT的栅极102和有源层104是造成TFT不透光的主要原因。本实施例中,可将源极106和漏极107的宽度相对于已知的源漏极的宽度适度减小,以在不影响TFT导电性能的基础上,进一步提高TFT的光线透过率。例如,源极106和漏极107在垂直于栅极线201的方向上的宽度W可为3μm~5μm。
在一个示例中,阵列基板的结构如图1和图2所示,包括衬底基板101; 位于衬底基板101上的包括栅极102和栅极线201的图形;覆盖前述包括栅极102和栅极线201的图形的栅极绝缘层103;位于栅极绝缘层103上的包括有源层104的图形;形成于包括有源层104的图形之后的包括刻蚀阻挡层105的图形,刻蚀阻挡层105上具有暴露出有源层104表面的源极接触孔和漏极接触孔;形成于包括刻蚀阻挡层105的图形之后的源极106和漏极107,其中,源极106通过源极接触孔与有源层104电性相连,漏极107通过漏极接触孔与有源层104电性相连。
需要说明的是,以上实施例所描述的阵列基板,其TFT为底栅型TFT,在本发明的其他实施例中,TFT还可为顶栅型TFT。
根据本发明的另一实施例,还提供了一种显示装置,该显示装置包括以上实施例所提供的阵列基板。
本实施例所提供的显示装置所包含的阵列基板,其TFT的栅极和有源层为透明元件,因此TFT的光线透过率大大提高,像素的开口面积变大,从而像素的开口率提高,装置的显示亮度增强。
显示装置例如可为OLED显示装置,该显示装置除包括本实施例所提供的阵列基板外,还包括设置于阵列基板上的OLED器件。进一步的,本实施例所提供的显示装置可为底出光式AMOLED显示装置或顶出光式AMOLED显示装置。例如,上述显示装置可为底出光式AMOLED显示装置,在光线从TFT阵列基板一侧出射时,TFT能够透过光线,提高了底出光式AMOLED显示装置的亮度。
显示装置例如还可以为液晶显示装置,比如显示器、电视机、电子纸、手机、平板电脑、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
本发明实施例所提供的阵列基板及显示装置中,TFT的栅极采用透明导电材料,有源层采用透明氧化物半导体材料,使栅极和有源层的光线透过率大大提高。由于TFT无法透过光线主要是由其栅极和有源层的遮挡引起的,因此本发明中使栅极和有源层由透明材料形成,能够极大地提高了TFT整体的光线透过率,减小了每个像素遮挡部分的面积,提高了像素开口率,增大了装置的显示亮度。
以上所述仅是本发明的示范性实施方式,而非用于限制本发明的保护范 围,本发明的保护范围由所附的权利要求确定。
本申请基于并且要求于2014年8月28日递交的中国专利申请第201410431289.2号的优先权,在此全文引用上述中国专利申请公开的内容。

Claims (15)

  1. 一种阵列基板,包括:沿第一方向的多条栅极线;沿第二方向的多条数据线,所述第二方向与所述第一方向相互垂直,所述数据线与所述栅极线交叉形成多个像素区域;其中每个像素区域包括薄膜晶体管,所述薄膜晶体管包括:栅极、有源层、源极和漏极;所述栅极的形成材料为透明导电材料,且所述有源层的形成材料为透明氧化物半导体材料。
  2. 根据权利要求1所述的阵列基板,其中所述栅极的形成材料为铟锡氧化物、铟锌氧化物、铟镓锌氧化物、锌锡氧化物中的至少一种。
  3. 根据权利要求2所述的阵列基板,其中所述栅极线的形成材料为金属,且所述栅极线与所述栅极电性相连。
  4. 根据权利要求1所述的阵列基板,其中所述有源层的形成材料为氧化锌、氧化锡、氧化铬、氧化铝、铟镓锌氧化物中的至少一种。
  5. 根据权利要求1所述的阵列基板,其中所述数据线、所述源极和所述漏极的形成材料为金属,且所述源极和所述漏极在垂直于所述栅极线的方向上的宽度为3μm~5μm。
  6. 根据权利要求1~5任一项所述的阵列基板,其中所述薄膜晶体管为底栅型薄膜晶体管或顶栅型薄膜晶体管。
  7. 一种显示装置,包括:权利要求1~6任一项所述的阵列基板。
  8. 根据权利要求7所述的显示装置,还包括:设置于所述阵列基板上的有机发光二极管器件。
  9. 根据权利要求8所述的显示装置,其中所述显示装置为底出光式有源矩阵有机发光二极管显示装置或顶出光式有源矩阵有机发光二极管显示装置。
  10. 一种阵列基板,包括:
    衬底基板;
    位于衬底基板上的包括栅极和栅极线的图形;
    覆盖前述包括栅极和栅极线的图形的栅极绝缘层;
    位于栅极绝缘层上的包括有源层的图形;
    形成于包括有源层的图形之上的包括刻蚀阻挡层的图形,刻蚀阻挡层上 具有暴露出有源层表面的源极接触孔和漏极接触孔;
    形成于包括刻蚀阻挡层的图形之上的源极和漏极,源极通过源极接触孔与有源层电性相连,漏极通过漏极接触孔与有源层电性相连;
    其中所述栅极的形成材料为透明导电材料,且所述有源层的形成材料为透明氧化物半导体材料。
  11. 根据权利要求10所述的阵列基板,其中所述栅极的形成材料为铟锡氧化物、铟锌氧化物、铟镓锌氧化物、锌锡氧化物中的至少一种。
  12. 根据权利要求11所述的阵列基板,其中所述栅极线的形成材料为金属,且所述栅极线与所述栅极电性相连。
  13. 根据权利要求10所述的阵列基板,其中所述有源层的形成材料为氧化锌、氧化锡、氧化铬、氧化铝、铟镓锌氧化物中的至少一种。
  14. 根据权利要求10所述的阵列基板,其中所述数据线、所述源极和所述漏极的形成材料为金属,且所述源极和所述漏极在垂直于所述栅极线的方向上的宽度为3μm~5μm。
  15. 根据权利要求10~14任一项所述的阵列基板,其中所述薄膜晶体管为底栅型薄膜晶体管或顶栅型薄膜晶体管。
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CN105093763A (zh) * 2015-08-19 2015-11-25 京东方科技集团股份有限公司 一种阵列基板、其制作方法、液晶显示面板及显示装置
CN107768386B (zh) 2017-11-16 2020-09-01 深圳市华星光电半导体显示技术有限公司 Tft阵列基板及其制作方法以及液晶显示面板
CN110767106B (zh) * 2018-09-30 2020-09-08 云谷(固安)科技有限公司 显示面板、显示屏及显示终端

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