CN110676267A - 一种显示面板及其制造方法 - Google Patents

一种显示面板及其制造方法 Download PDF

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CN110676267A
CN110676267A CN201910931468.5A CN201910931468A CN110676267A CN 110676267 A CN110676267 A CN 110676267A CN 201910931468 A CN201910931468 A CN 201910931468A CN 110676267 A CN110676267 A CN 110676267A
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pixel electrode
insulating layer
display panel
electrode precursor
contact hole
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董波
简锦诚
郑帅
陈方
郝光叶
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Nanjing CEC Panda LCD Technology Co Ltd
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Nanjing CEC Panda LCD Technology Co Ltd
Nanjing Huadong Electronics Information and Technology Co Ltd
Nanjing CEC Panda FPD Technology Co Ltd
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
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    • H01L27/12Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
    • H01L27/1214Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
    • H01L27/124Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits
    • H01L27/1244Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits for preventing breakage, peeling or short circuiting
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    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
    • H01L27/12Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
    • H01L27/1214Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
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Abstract

本发明提供一种显示面板及其制造方法,显示面板包括扫描线和数据线、TFT开关、像素区域以及像素电极;所述像素电极包括与所述半导体形成材料相同的像素电极前体,所述显示面板还包括覆盖像素电极前体和半导体层的第二绝缘层,所述第二绝缘层在像素电极前体上开设接触孔,接触孔不超过像素电极前体的边缘;像素电极前体经离子注入进入所述接触孔内并形成具有导体性的像素电极。本发明显示面板及其制造方法,像素电极的边缘为一个缓升的台阶,有利于配向膜的涂布;避免了第三绝缘层的边缘UnderCut(底切)的发生;降低了公共电极爬坡断线的风险。

Description

一种显示面板及其制造方法
技术领域
本发明涉及显示面板的技术领域,尤其涉及一种显示面板及其制造方法。
背景技术
现有主流显示主要分为液晶显示(TFT-LCD)和有机EL(Electro Luminescence:电致发光)显示装置(包括即OLED或Micr OLED等,主要为OLED),无论是被动发光的TFT-LCD还是自动电致发光的OLED,都需要作为开关元件的薄膜晶体管(Thin Film Transistror,简称TFT),通过在阵列基板上形成多个栅极配线、源极配线以及位于栅极配线和源极配线交叉处的TFT。TFT有源层目前常用的材料主要分为三类:非晶硅、低温多晶硅和氧化物半导体。由于氧化物半导体与非晶硅相比,具有较高迁移率,与低温多晶硅相比,均一性较好,且制造工艺相对简单,因此比较适用于大面积显示装置如TV、Monitior等。
如何优选共用工艺,从而抑制掩模版数和工序数的增加,成为各家研究的热点。专利文献103155138A有提到氧化物半导体可以进行导体化,但对可能出现的问题和新工艺下像素结构的设计未提到,经过我们研究发现,在完成去除氧化物半导体上绝缘层(第二绝缘层,Pas1)这一工艺时,如果开孔(即曝光的范围超出了氧化物半导体(OS)边界),则在刻蚀氧化物半导体上的绝缘层后,还会继续刻蚀氧化物半导体层下面的第一绝缘层(GI),第一绝缘层(GI)被刻蚀的~2000A,最终导致出现氧化物半导体的边缘UnderCut(底切),对后续工艺不良,比如可能会导致增加后面的ITO爬坡断线风险,影响产品品质和良率。
发明内容
本发明提供一种显示面板,其包括纵横交错的扫描线和数据线、位于扫描线和数据线交叉处的TFT开关、由扫描线和数据线交叉限定的像素区域以及位于每个像素区域的像素电极;所述TFT开关包括与扫描线连接的栅极、与数据线连接的源极、与像素电极连接的漏极、以及与栅极重叠的半导体层;所述像素电极包括与所述半导体形成材料相同的像素电极前体,所述显示面板还包括覆盖像素电极前体和半导体层的第二绝缘层,所述第二绝缘层在像素电极前体上开设接触孔,接触孔不超过像素电极前体的边缘;像素电极前体经离子注入进入所述接触孔内并形成具有导体性的像素电极。
优选地,所述接触孔离像素电极前体的边缘为1-5um。
优选地,部分像素电极前体被第二绝缘层覆盖,被第二绝缘层覆盖的部分像素电极前体通过横向扩散方式形成导体化的像素电极。
优选地,还包括覆盖第二绝缘层和像素电极的第三绝缘层、以及位于第三绝缘层上的公共电极。
优选地,公共电极在像素电极重叠的位置设有狭缝。
本发明还提供一种显示面板的制造方法,包括如下步骤:
S1:在基板上沉积第一金属层,然后形成图案化的栅极和扫描线;
S2:在形成步骤S1的基础上沉积覆盖第一金属层的栅极绝缘层;
S3:在步骤S2的基础上沉积氧化物半导体材料层,对氧化物半导体材料层进行图案化形成半导体层和像素电极前体;
S4:在步骤S3的基础上沉积第二金属层,对第二金属层金属图案化形成分别与半导体层接触的源极和漏极、以及与源极连接的数据线;
S5:在步骤S4的基础上沉积第二绝缘层,对第二绝缘层进行图案化形成位于像素电极前体上的接触孔,接触孔不超过像素电极前体的边缘;
S6:在步骤S5的基础上通过离子进入第接触孔内使得像素电极前体进行导体化并形成像素电极。
优选地,针对步骤S5,部分像素电极前体仍被第二绝缘层覆盖;针对步骤S6,被第二绝缘层覆盖的部分像素电极前体通过横向扩散方式形成导体化的像素电极。
优选地,所述接触孔离像素电极前体的边缘为1-5um。
优选地,还包括如下步骤:
S7:在步骤S6的基础上沉积第三绝缘层;
S8:在步骤S7的基础上沉积透明电极并形成图案化的公共电极。
本发明显示面板及其制造方法,像素电极的边缘为一个缓升的台阶,有利于配向膜的涂布;避免了第三绝缘层的边缘UnderCut(底切)的发生;降低了公共电极爬坡断线的风险。
附图说明
图1为本发明显示面板的制造步骤之一的结构示意图;
图2为本发明显示面板的制造步骤之二的结构示意图;
图3为本发明显示面板的制造步骤之三的结构示意图;
图4为本发明显示面板的制造步骤之四的结构示意图;
图5为本发明显示面板的制造步骤之五的结构示意图;
图6为本发明显示面板的制造步骤之六的结构示意图;
图7为图6所示显示面板的制造步骤六的俯视图;
图8为本发明显示面板的制造步骤之七的结构示意图;
图9为本发明显示面板的制造步骤之八的结构示意图。
具体实施方式
下面结合附图和具体实施例,进一步阐明本发明,应理解这些实施例仅用于说明本发明而不用于限制本发明的范围,在阅读了本发明之后,本领域技术人员对本发明的各种等价形式的修改均落于本申请所附权利要求所限定的范围。
为使图面简洁,各图中只示意性地表示出了与本发明相关的部分,它们并不代表其作为产品的实际结构。另外,以使图面简洁便于理解,在有些图中具有相同结构或功能的部件,仅示意性地绘示了其中的一个,或仅标出了其中的一个。在本文中,“一个”不仅表示“仅此一个”,也可以表示“多于一个”的情形。
本发明揭示一种显示面板的制造方法,包括如下步骤:
S1:如图1所示,在玻璃基板10上沉积第一金属层,然后在第一金属层上涂覆光阻(图未示),经过光刻和刻蚀后形成图案化的栅极20和扫描线21;
其中,第一金属层的材料为钼或铌或铜,其厚度约
Figure BDA0002220402370000031
最好为
Figure BDA0002220402370000032
S2:如图2所示,在形成步骤S1的基础上沉积覆盖第一金属层的栅极绝缘层30;
其中,栅极绝缘层30作为第一绝缘层,其材料为氮化硅或氧化硅,其厚度
Figure BDA0002220402370000033
S3:如图3所示,在步骤S2的基础上沉积氧化物半导体材料层,对氧化物半导体材料层进行图案化形成半导体层40和像素电极前体50;
其中,氧化物半导体材料层的材料为IGZO,其厚度为
Figure BDA0002220402370000034
S4:如图4所示,在步骤S3的基础上沉积第二金属层,对第二金属层金属图案化形成分别与半导体层40接触的源极61和漏极62、以及与源极61连接的数据线63;
其中,第二金属层的材料为钼或铌或铜,其厚度约
Figure BDA0002220402370000041
S5:如图5所示,在步骤S4的基础上沉积第二绝缘层70,对第二绝缘层70进行图案化形成位于像素电极前体50上的接触孔71,使像素电极前体50露出来;
其中,第二绝缘层70的材料为氧化硅或者氮化硅,其厚度约为
Figure BDA0002220402370000042
接触孔70不超过像素电极前体50的边缘,离像素电极前体50的边缘为1~5um,部分像素电极前体50仍被第二绝缘层70覆盖。
S6:如图6和图7所示,在步骤S5的基础上通过Ar等离子体或者H2离子进入第接触孔71内使得像素电极前体50进行导体化并形成像素电极80,被第二绝缘层70覆盖的部分像素电极前体50通过横向扩散方式形成导体化的像素电极80;
其中,TFT沟道因为第二绝缘层70的保护,则不会被导体化。
S7:如图8所示,在步骤S6的基础上沉积第三绝缘层90,对第三绝缘层90进行图案化形成与信号连接的端子接触孔(图未示);
其中,第三绝缘层90的材料为氮化硅,其厚度约为
Figure BDA0002220402370000043
S8:如图9所示,在步骤S7的基础上沉积透明电极并形成图案化的公共电极100。
其中公共电极100在像素电极80重叠位置设有狭缝,透明电极的材料为ITO或纳米银线等,其厚度
Figure BDA0002220402370000044
针对步骤S5,如图7所示,在进行第二绝缘层70曝光刻蚀需控制如下:第一:第二绝缘层70刻蚀后没有超出像素电极前体50的边界,即最外围像素电极仍然覆盖有第二绝缘层70;第二:第二绝缘层70刻蚀后,接触孔71离像素电极的边界为1~5um。第三:第二绝缘层70覆盖下的像素电极前体50通过横向扩散方式进行导体化。
本发明还提供一种显示面板,其包括纵横交错的扫描线21和数据线63、位于扫描线21和数据线63交叉处的TFT开关、由扫描线21和数据线63交叉限定的像素区域、位于每个像素区域的像素电极70、覆盖像素电极70的第三绝缘层90以及位于第三绝缘层70上方的公共电极100。
其中,TFT开关包括与扫描线21连接的栅极20、与数据线63连接的源极61、与像素电极70连接的漏极62、以及与栅极20重叠的半导体层40。
其中,像素电极70由像素电极前体50,像素电极前体50经离子注入形成具有导体化的像素电极70;像素电极前体50和半导体层40形成的材料相同、都是氧化物半导体材料。
显示面板还包括覆盖像素电极前体50和半导体层40的第二绝缘层70,第二绝缘层70在像素电极前体50开设接触孔71,接触孔71不超过像素电极前体50的边缘,离像素电极前体50的边缘为1~5um,部分像素电极前体50仍被第二绝缘层70覆盖。
第三绝缘层90也覆盖第二绝缘层70。
通过Ar等离子体或者H2离子进入接触孔71内使得像素电极前体50进行导体化并形成像素电极80,被第二绝缘层70覆盖的部分像素电极前体50通过横向扩散方式形成导体化的像素电极80;
本发明显示面板及其制造方法,像素电极的边缘为一个缓升的台阶,有利于配向膜的涂布;避免了第三绝缘层的边缘UnderCut(底切)的发生;降低了公共电极爬坡断线的风险。
以上详细描述了本发明的优选实施方式,但是本发明并不限于上述实施方式中的具体细节,在本发明的技术构思范围内,可以对本发明的技术方案进行多种等同变换(如数量、形状、位置等),这些等同变换均属于本发明的保护范围。

Claims (9)

1.一种显示面板,其包括纵横交错的扫描线和数据线、位于扫描线和数据线交叉处的TFT开关、由扫描线和数据线交叉限定的像素区域以及位于每个像素区域的像素电极;所述TFT开关包括与扫描线连接的栅极、与数据线连接的源极、与像素电极连接的漏极、以及与栅极重叠的半导体层;其特征在于:所述像素电极包括与所述半导体形成材料相同的像素电极前体,所述显示面板还包括覆盖像素电极前体和半导体层的第二绝缘层,所述第二绝缘层在像素电极前体上开设接触孔,接触孔不超过像素电极前体的边缘;像素电极前体经离子注入进入所述接触孔内并形成具有导体性的像素电极。
2.根据权利要求1所述的显示面板,其特征在于:所述接触孔离像素电极前体的边缘为1-5um。
3.根据权利要求1所述的显示面板,其特征在于:部分像素电极前体被第二绝缘层覆盖,被第二绝缘层覆盖的部分像素电极前体通过横向扩散方式形成导体化的像素电极。
4.根据权利要求1所述的显示面板,其特征在于:还包括覆盖第二绝缘层和像素电极的第三绝缘层、以及位于第三绝缘层上的公共电极。
5.根据权利要求4所述的显示面板,其特征在于:公共电极在像素电极重叠的位置设有狭缝。
6.一种显示面板的制造方法,其特征在于,包括如下步骤:
S1:在基板上沉积第一金属层,然后形成图案化的栅极和扫描线;
S2:在形成步骤S1的基础上沉积覆盖第一金属层的栅极绝缘层;
S3:在步骤S2的基础上沉积氧化物半导体材料层,对氧化物半导体材料层进行图案化形成半导体层和像素电极前体;
S4:在步骤S3的基础上沉积第二金属层,对第二金属层金属图案化形成分别与半导体层接触的源极和漏极、以及与源极连接的数据线;
S5:在步骤S4的基础上沉积第二绝缘层,对第二绝缘层进行图案化形成位于像素电极前体上的接触孔,接触孔不超过像素电极前体的边缘;
S6:在步骤S5的基础上通过离子进入第接触孔内使得像素电极前体进行导体化并形成像素电极。
7.根据权利要求6所述的显示面板的制造方法,其特征在于,针对步骤S5,部分像素电极前体仍被第二绝缘层覆盖;针对步骤S6,被第二绝缘层覆盖的部分像素电极前体通过横向扩散方式形成导体化的像素电极。
8.根据权利要求6所述的显示面板的制造方法,其特征在于,所述接触孔离像素电极前体的边缘为1-5um。
9.根据权利要求6所述的显示面板的制造方法,其特征在于,还包括如下步骤:
S7:在步骤S6的基础上沉积第三绝缘层;
S8:在步骤S7的基础上沉积透明电极并形成图案化的公共电极。
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