CN104103583B - 阵列基板及其制作方法和显示面板 - Google Patents

阵列基板及其制作方法和显示面板 Download PDF

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CN104103583B
CN104103583B CN201410286328.4A CN201410286328A CN104103583B CN 104103583 B CN104103583 B CN 104103583B CN 201410286328 A CN201410286328 A CN 201410286328A CN 104103583 B CN104103583 B CN 104103583B
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张鹏举
赵雨
高紫龙
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BOE Technology Group Co Ltd
Beijing BOE Optoelectronics Technology Co Ltd
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    • HELECTRICITY
    • 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
    • H01L27/1259Multistep manufacturing methods
    • H01L27/127Multistep manufacturing methods with a particular formation, treatment or patterning of the active layer specially adapted to the circuit arrangement
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
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    • 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
    • H01L27/1259Multistep manufacturing methods
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    • 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
    • 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
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
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    • 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
    • H01L27/1248Devices 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 or shape of the interlayer dielectric specially adapted to the circuit arrangement

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Abstract

本发明提供一种阵列基板及其制作方法和显示面板,所述阵列基板包括多个薄膜晶体管,所述阵列基板的制作方法包括:S1、提供基板,该基板上形成有所述薄膜晶体管的源极和漏极;S2、在所述基板上形成绝缘层,所述绝缘层包括间隔区域和多个条状电极区域,所述间隔区域将任意相邻的两个所述条状电极区域隔开;S3、在所述绝缘层的间隔区域上方形成间隔层;S4、在所述绝缘层的条状电极区域上方形成包括条状电极的图形;S5、对所述间隔区域上方的间隔层进行剥离。本发明能够防止各条状电极之间因刻蚀残留物而发生互连的现象,进而提高产品特性。

Description

阵列基板及其制作方法和显示面板
技术领域
本发明涉及显示器制造技术领域,具体涉及一种阵列基板的制作方法、该制作方法制得的阵列基板和包括该阵列基板的显示面板。
背景技术
目前,薄膜晶体管液晶显示器(Thin Film Transistor Liquid CrystalDisplay,TFT-LCD)的阵列基板是通过多次构图工艺来完成,其中,每次构图工艺又包括:光刻胶涂覆、曝光、显影、刻蚀和剥离等工艺。
一般可以通过四次、五次或六次构图工艺来完成阵列基板的制作。其中五次构图工艺形成阵列基板的方法包括:
首先,在基板1上沉积栅金属,通过第一次构图工艺形成栅极2的图形,如图1所示;
其次,沉积绝缘材料(SiNx),使得栅极2与后续半导体层隔离,并在绝缘材料上再进场半导体a-Si的沉积,通过第二次构图工艺形成栅极绝缘层3的图形和半导体层4的图形,如图2所示;
再次,沉积源漏金属,通过第三次构图工艺形成源极5和漏极6的图形,如图3所示;
然后,再一次沉积绝缘材料,通过第四次构图工艺在绝缘层7(钝化层PVX)上形成过孔8,如图4所示;
最后,沉积透明电极的材料(如,ITO薄膜),通过第五次构图工艺形成像素电极9的图形,从而形成阵列基板,如图5所示。
在上述的形成像素电极9的过程中,对ITO薄膜刻蚀时,容易产生刻蚀残留物10(如图5所示),从而产生像素电极9之间互联的现象,影响产品质量。
发明内容
有鉴于此,本发明的目的在于提供一种阵列基板的制作方法,由该制作方法制得的阵列基板和包括该阵列基板的显示面板,以防止像素电极之间产生刻蚀残留物,从而提高产品质量。
为了实现上述目的,本发明提供一种阵列基板的制作方法,所述阵列基板包括多个薄膜晶体管,所述阵列基板的制作方法包括:
S1、提供基板,该基板上形成有所述薄膜晶体管的源极和漏极;
S2、在所述基板上形成绝缘层,所述绝缘层包括间隔区域和多个条状电极区域,所述间隔区域将任意相邻的两个所述条状电极区域隔开;
S3、在所述绝缘层的间隔区域上方形成间隔层;
S4、在所述绝缘层的条状电极区域上方形成包括条状电极的图形;
S5、对所述间隔区域上方的间隔层进行剥离。
优选地,所述间隔层由光刻胶制成。
优选地,所述步骤S3包括:
S31、在所述绝缘层上涂覆光刻胶;
S32、通过构图工艺形成所述间隔层。
优选地,所述条状电极为像素电极。
优选地,所述绝缘层的条状电极区域包括用于形成过孔的过孔子区域,所述步骤S32包括:
S321、对所述光刻胶进行曝光和显影,使得显影后的所述间隔区域的光刻胶的厚度大于所述条状电极区域的光刻胶的厚度,并且去除过孔子区域的光刻胶;
S323、对光刻胶进行灰化,以去除所述条状电极区域的光刻胶,在所述间隔区形成所述间隔层。
优选地,在所述步骤S321中,显影后的所述间隔区域的光刻胶的厚度在1.5~2.0微米之间,所述条状电极区域的光刻胶的厚度在0.3~1.0微米之间。
优选地,在所述步骤S321中,使用半色调掩膜板对所述光刻胶曝光,所述半色调掩膜板的完全透光部分对应于所述过孔子区域,所述半色调掩膜板的半透光区域对应于所述条状电极区域,所述半色调掩膜板的遮挡区域对应于所述间隔区域。
优选地,所述制作方法还包括在所述步骤S321和所述步骤S323之间执行的:
S322、对所述绝缘层的过孔子区域进行刻蚀,形成过孔,以将所述薄膜晶体管的漏极的一部分暴露出。
优选地,所述步骤S4包括:
S41、形成像素电极材料层,该像素电极材料层通过所述过孔与所述薄膜晶体管的漏极相连;
S42、通过构图工艺形成包括像素电极的图案。
优选地,所述绝缘层包括硅的氮化物。
相应的,本发明还提供一种由上述制作方法制得的阵列基板。
相应地,本发明还提供一种包括上述阵列基板的显示面板。
可以看出,绝缘层的间隔区域将任意相邻的两个条状电极区域隔开,间隔区域上方形成有间隔层,因此在条状电极区域上方形成条状电极时,刻蚀过程中产生的刻蚀残留物会附着在间隔层11上,通过对间隔层进行剥离后,可以将刻蚀残留物一并除去,从而防止各条状电极之间因刻蚀残留物而发生互连的现象,进而提高产品特性。
附图说明
附图是用来提供对本发明的进一步理解,并且构成说明书的一部分,与下面的具体实施方式一起用于解释本发明,但并不构成对本发明的限制。在附图中:
图1所示的是现有技术中在基板上形成栅极的结构示意图;
图2所示的是现有技术中在基板上栅极绝缘层和半导体层的结构示意图;
图3所示的是现有技术中在基板上形成源极和漏极的示意图;
图4所示的是现有技术中形成过孔的结构示意图;
图5所示的是现有技术中在基板上形成像素电极的结构示意图;
图6所示的是本发明所提供的阵列基板的制作方法的流程图;
图7所示的是实施方式中对光刻胶曝光和显影后的结构示意图;
图8所示的是实施方式中形成间隔层的结构示意图;
图9所示的是实施方式中形成像素电极的结构示意图;
图10所示的是实施方式中阵列基板的结构示意图。
附图标记说明
1:基板;2:栅极;3:栅极绝缘层;4:半导体层;5:源极;6:漏极;7:绝缘层;8:过孔;9:像素电极;10:刻蚀残留物;11:间隔层。
具体实施方式
以下结合附图对本发明的具体实施方式进行详细说明。应当理解的是,此处所描述的具体实施方式仅用于说明和解释本发明,并不用于限制本发明。
作为本发明的一个方面,提供一种阵列基板的制作方法,所述阵列基板包括多个薄膜晶体管,如图6所示,所述阵列基板的制作方法可以包括:
S1、提供基板1,该基板1上形成有所述薄膜晶体管的源极5和漏极6;
S2、在基板1上形成绝缘层7,绝缘层7包括间隔区域和多个条状电极区域,所述间隔区域将任意相邻的两个所述条状电极区域隔开;
S3、在绝缘层7的间隔区域上方形成间隔层11;
S4、在绝缘层7的条状电极区域上方形成包括条状电极的图形;
S5、对所述间隔区域上方的间隔层进行剥离。
在本发明中,绝缘层7的间隔区域将任意相邻两个所述条状电极区域隔开,所述间隔区域上方形成有间隔层11,因此在条状电极区域上方形成条状电极时,刻蚀过程中产生的刻蚀残留物10会附着在间隔层11上,通过对间隔层11进行剥离后,可以将刻蚀残留物10一并除去,从而防止各条状电极之间因刻蚀残留物10而发生互连的现象,进而提高产品特性。
在本发明中,每个所述“条状电极”都包括互相电连接的多个电极条。在步骤S2中形成的“间隔区域”位于相邻的两个“条状电极”之间,而非位于同一个“条状电极”中相邻两个电极条之间。在本发明中,“条状电极”可以用作公共电极,也可以用作像素电极。
如图7所示,所述薄膜晶体管具体可以包括栅极2、栅极绝缘层3、半导体层4、源极5和漏极6,通常可以在基板1上形成栅极金属膜层,通过第一次构图工艺形成包括栅极2的图形;然后在基板上形成绝缘膜层和半导体膜层,通过第二次构图工艺同时形成包括栅极绝缘层和半导体层的图形;再次在基板1上形成源漏金属膜层,通过第三次构图工艺形成包括源极5和漏极6的图形。可以通过多种沉积方法在基板1上形成的各个膜层,如涂布、化学气相沉积(PVD)、溅射、蒸镀等。阵列基板上的与薄膜晶体管的栅极相连的栅线可以和栅极2同时形成,与薄膜晶体管的源极5相连的数据线可以和源极5以及漏极6同时形成。
作为本发明的一种优选方式,间隔层11由光刻胶制成。
为了便于间隔层11的形成,步骤S3可以包括:
S31、在绝缘层7上涂覆光刻胶;
S32、通过构图工艺形成间隔层11。
具体地,可以先在绝缘层11的间隔区域和条状电极区域上均涂覆光刻胶,所述光刻胶可以为正性光刻胶,也可以为负性光刻胶,以正性光刻胶为例,使用掩膜板对光刻胶进行曝光,掩膜板的开口图案与所述条状电极区域相对应,以使得条状区域上的光刻胶变形;然后使用显影液除去所述条状电极区域上的光刻胶,而间隔区域上的光刻胶保留,从而形成间隔层11。
在本发明中,所述条状电极可以为像素电极,也可以为公共电极,作为本发明的一种具体实施方式,所述条状电极为像素电极9。
当所述条状电极为像素电极9时,为了将像素电极9与薄膜晶体管的漏极5相连,可以在绝缘层7上形成过孔,以将漏极6的部分露出,从而与像素电极9相连。绝缘层7的条状电极区域可以包括用于形成过孔8的过孔子区域,所述步骤S32可以包括:
S321、对所述光刻胶进行曝光和显影,使得显影后的所述间隔区域的光刻胶的厚度大于所述条状电极区域的光刻胶的厚度,并且去除过孔子区域的光刻胶(如图7所示);
S323、对光刻胶进行灰化,以去除所述条状电极区域的光刻胶,在所述间隔区形成间隔层11(如图8所示)。
优选地,在所述步骤S321中,显影后的所述间隔区域的光刻胶的厚度在1.5~2.0微米之间,所述条状电极区域的光刻胶的厚度在0.3~1.0微米之间。
为了便于不同所述步骤S321中不同厚度的光刻胶的形成,更进一步地,在所述步骤S321中,使用半色调掩膜板(half tone mask)对所述光刻胶曝光,所述半色调掩膜板的完全透光部分对应于所述过孔子区域,所述半色调掩膜板的半透光区域对应于所述条状电极区域,所述半色调掩膜板的遮挡区域对应于所述间隔区域。
以正性光刻胶为例,所述半色调掩膜板上的完全透光部分可以使得光线完全透过,部分透光区域设置有部分透光性光栅结构。在曝光过程中,所述半色调掩膜板的完全透光部分对应的过孔子区域上的光刻胶受到全光照射,因而会发生完全变性,显影后会完全被显影液溶解;所述半色调掩膜板的部分透光部分对应的条状电极区域上的光刻胶受到的光照量较少,不足以使得光刻胶发生完全变性,因而在显影后部分被溶解显影液溶解,没有被溶解的一部分保留在条状电极区域;所述半色调掩膜板的遮挡区域对应的间隔区域未受到光照,不会发生变性,因而在显影后将全部保留在间隔区域。
如上文中所述,为了将像素电极9和薄膜晶体管的漏极6相连,可以在绝缘层7上形成过孔8,即,所述制作方法还可以包括在所述步骤S321和所述步骤S323之间执行的:
S322、对绝缘层7的过孔子区域进行刻蚀,形成过孔8,以将所述薄膜晶体管的漏极5的一部分暴露出(如图8所示)。
由于所述过孔子区域上的光刻胶被显影液除去,因此,可以通过腐蚀性的液体、气体等,将形成所述过孔子区域的膜层腐蚀除去。
更进一步地,所述步骤S4可以包括:
S41、形成像素电极材料层,该像素电极材料层通过所述过孔与所述薄膜晶体管的漏极5相连;
S32、通过构图工艺形成包括像素电极9的图案(如图9所示)。
所述像素电极材料层为透明的导电材料层,优选地,所述像素电极材料层为氧化铟锡(ITO)膜。
具体地,可以在所述氧化铟锡膜上涂布光刻胶,然后通过曝光和显影保留条状电极区域上方的光刻胶,再将间隔区域上方没有光刻胶保护的氧化银锡膜层刻蚀掉,一旦产生刻蚀残留物,将会残留在间隔区域上方的间隔层上,最后将间隔区域上方的间隔层11(光刻胶)剥离掉(如图10所示)。其中,由于间隔层为光刻胶,因而间隔区域上方的光刻胶可以和条状电极区域上方的光刻胶一同除去。
本发明所述的源漏极上方的绝缘层可以为包括硅的氮化物(SiNx),以对数据线进行保护。
以上为对本发明所提供的阵列基板的制作方法的描述,可以看出,绝缘层7的间隔区域将任意相邻两个所述条状电极区域隔开,所述间隔区域上方形成有间隔层11,因此在条状电极区域上方形成条状电极时,刻蚀过程中产生的刻蚀残留物10会附着在间隔层11上,通过对间隔层11进行剥离后,可以将刻蚀残留物10一并除去,从而防止各条状电极之间因刻蚀残留物10而发生互连的现象,进而提高产品特性。
作为本发明的另一个方面,还提供一种由上述制作方法制得的阵列基板。所述阵列基板上,相邻的条状电极之间没有刻蚀残留物,因此,相邻的条状电极之间具有较好的绝缘性能,从而可以提高包括所述阵列基板的显示面板的显示效果。
作为本发明的再一个方面,提供一种包括上述阵列基板的显示面板。
可以理解的是,以上实施方式仅仅是为了说明本发明的原理而采用的示例性实施方式,然而本发明并不局限于此。对于本领域内的普通技术人员而言,在不脱离本发明的精神和实质的情况下,可以做出各种变型和改进,这些变型和改进也视为本发明的保护范围。

Claims (12)

1.一种阵列基板的制作方法,所述阵列基板包括多个薄膜晶体管,其特征在于,所述阵列基板的制作方法包括:
S1、提供基板,该基板上形成有所述薄膜晶体管的源极和漏极;
S2、在所述基板上形成绝缘层,所述绝缘层包括间隔区域和多个条状电极区域,所述间隔区域将任意相邻的两个所述条状电极区域隔开;
S3、在所述绝缘层的间隔区域上方形成间隔层;
S4、在所述绝缘层的条状电极区域上方形成包括条状电极的图形;
S5、对所述间隔区域上方的间隔层进行剥离。
2.根据权利要求1所述的阵列基板的制作方法,其特征在于,所述间隔层由光刻胶制成。
3.根据权利要求2所述的阵列基板的制作方法,其特征在于,所述步骤S3包括:
S31、在所述绝缘层上涂覆光刻胶;
S32、通过构图工艺形成所述间隔层。
4.根据权利要求1所述的阵列基板的制作方法,其特征在于,所述条状电极为像素电极。
5.根据权利要求3所述的制作方法,其特征在于,所述绝缘层的条状电极区域包括用于形成过孔的过孔子区域,所述步骤S32包括:
S321、对所述光刻胶进行曝光和显影,使得显影后的所述间隔区域的光刻胶的厚度大于所述条状电极区域的光刻胶的厚度,并且去除过孔子区域的光刻胶;
S323、对光刻胶进行灰化,以去除所述条状电极区域的光刻胶,在所述间隔区域形成所述间隔层。
6.根据权利要求5所述的阵列基板的制作方法,其特征在于,在所述步骤S321中,显影后的所述间隔区域的光刻胶的厚度在1.5~2.0微米之间,所述条状电极区域的光刻胶的厚度在0.3~1.0微米之间。
7.根据权利要求5所述的阵列基板的制作方法,其特征在于,在所述步骤S321中,使用半色调掩膜板对所述光刻胶曝光,所述半色调掩膜板的完全透光部分对应于所述过孔子区域,所述半色调掩膜板的半透光区域对应于所述条状电极区域,所述半色调掩膜板的遮挡区域对应于所述间隔区域。
8.根据权利要求5所述的阵列基板的制作方法,其特征在于,所述制作方法还包括在所述步骤S321和所述步骤S323之间执行的:
S322、对所述绝缘层的过孔子区域进行刻蚀,形成过孔,以将所述薄膜晶体管的漏极的一部分暴露出。
9.根据权利要求8所述的阵列基板的制作方法,其特征在于,所述步骤S4包括:
S41、形成像素电极材料层,该像素电极材料层通过所述过孔与所述薄膜晶体管的漏极相连;
S42、通过构图工艺形成包括像素电极的图案。
10.根据权利要求1至9中任意一项所述的阵列基板的制作方法,其特征在于,所述绝缘层包括硅的氮化物。
11.一种阵列基板,其特征在于,该阵列基板由权利要求1至10中任意一项所述的制作方法制得。
12.一种显示面板,该显示面板包括阵列基板,其特征在于,所述阵列基板为权利要求11所述的阵列基板。
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