CN106847704A - 对金属层表面粗糙化处理的方法、薄膜晶体管及制作方法 - Google Patents

对金属层表面粗糙化处理的方法、薄膜晶体管及制作方法 Download PDF

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CN106847704A
CN106847704A CN201710071436.3A CN201710071436A CN106847704A CN 106847704 A CN106847704 A CN 106847704A CN 201710071436 A CN201710071436 A CN 201710071436A CN 106847704 A CN106847704 A CN 106847704A
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CN106847704B (zh
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冯京
崔承镇
张方振
黎午升
吕志军
宁策
王久石
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BOE Technology Group Co Ltd
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Abstract

本发明公开了一种对金属层表面粗糙化处理的方法、薄膜晶体管及制作方法,通过对金属层表面进行粗糙化处理,使金属层表面变得粗糙,增加了后续在金属层表面进行构图时的附着力。所述对金属层表面粗糙化处理的方法,包括:在金属层表面形成第一光刻胶层,并对所述第一光刻胶层进行高温处理;剥离所述第一光刻胶层,使所述金属层表面粗糙化。

Description

对金属层表面粗糙化处理的方法、薄膜晶体管及制作方法
技术领域
本发明涉及显示技术领域,尤其涉及一种对金属层表面粗糙化处理的方法、薄膜晶体管及制作方法。
背景技术
现有技术中在对金属层进行刻蚀时,将光刻胶形成在金属层上方,通过掩膜版对光刻胶进行曝光显影、灰化后,对金属层进行刻蚀时,由于金属层表面与光刻胶的粘附性不好,使得光刻胶容易脱落。因此,在对金属层进行刻蚀时,造成对金属层图形的破坏。
因此,如何避免形成在金属层表面的光刻胶的脱落,是亟待解决的一个技术难题。
发明内容
有鉴于此,本发明提供一种对金属层表面粗糙化处理的方法、薄膜晶体管及制作方法,通过对金属层表面进行粗糙化处理,使金属层表面变得粗糙,增加了后续在金属层表面进行构图时的附着力。
本发明实施例提供了一种对金属层表面粗糙化处理的方法,包括:
在金属层表面形成第一光刻胶层,并对所述第一光刻胶层进行高温处理;
剥离所述第一光刻胶层,使所述金属层表面粗糙化。
在一种可能的实施方式中,本发明实施例提供的上述对金属层表面粗糙化处理的方法中,对所述第一光刻胶层进行高温处理,包括:
对所述第一光刻胶层进行前烘、曝光显影以及后烘处理。
在一种可能的实施方式中,本发明实施例提供的上述对金属层表面粗糙化处理的方法中,所述后烘处理的温度为110°-150°。
相应地,本发明实施例还提供了一种薄膜晶体管的制作方法,该方法包括:
在衬底基板上形成氧化物半导体层和源漏金属层;
采用本发明实施例提供的上述任一种的对金属层表面粗糙化处理的方法对所述源漏金属层的表面进行粗糙化处理;
对经过粗糙化处理的源漏金属层以及氧化物半导体层进行构图工艺,形成源漏电极的图案和有源层的图案。
在一种可能的实施方式中,本发明实施例提供的上述制作方法中,对经过粗糙化处理的源漏金属层以及氧化物半导体层进行构图工艺,形成源漏电极的图案和有源层的图案,包括:
在经过粗糙处理后的源漏金属层之上形成第二光刻胶层;
对所述第二光刻胶层进行曝光显影,形成第二光刻胶完全保留区域、第二光刻胶完全去除区域和第二光刻胶半保留区域,所述第二光刻胶半保留区域与沟道区域相对应,所述第二光刻胶完全保留区域与即将形成的源漏电极的图案相对应;
对所述第二光刻胶完全去除区域所对应的源漏金属层和氧化物半导体层进行刻蚀,形成有源层的图形;
灰化所述第二光刻胶层,使所述第二光刻胶层的半保留区域去除;
对所述第二光刻胶半保留区域所对应的源漏金属层进行刻蚀,形成源漏电极的图案。
在一种可能的实施方式中,本发明实施例提供的上述制作方法中,显影所述第二光刻胶层之后,且对所述源漏金属层进行刻蚀之前,该方法还包括:
对显影后的第二光刻胶层进行后烘处理。
在一种可能的实施方式中,本发明实施例提供的上述制作方法中,灰化所述第二光刻胶层之后,且对所述第二光刻胶半保留区域所对应的源漏金属层进行刻蚀之前,该方法还包括:
对灰化后的第二光刻胶层进行后烘处理。
在一种可能的实施方式中,本发明实施例提供的上述制作方法中,对所述第二光刻胶完全去除区域所对应的源漏金属层和氧化物半导体层进行刻蚀时,采用的过蚀时间为刻蚀干净所述第二光刻胶完全去除区域所对应的源漏金属层和氧化物半导体层所用时长的5%-20%。
在一种可能的实施方式中,本发明实施例提供的上述制作方法中,对所述第二光刻胶半保留区域所对应的源漏金属层进行刻蚀时,采用的过蚀时间为刻蚀干净所述第二光刻胶半保留区域所对应的源漏金属层所用时长0%-20%。
相应地,本发明实施例还提供了一种薄膜晶体管,包括采用本发明实施例提供的任一种的薄膜晶体管的制作方法制作的薄膜晶体管。
相应地,本发明实施例还提供了一种阵列基板,包括本发明实施例提供的上述薄膜晶体管。
本发明有益效果如下:
本发明实施例提供的一种对金属层表面粗糙化处理的方法,包括:在金属层表面形成第一光刻胶层,并对所述第一光刻胶层进行高温处理;剥离所述第一光刻胶层,使所述金属层表面粗糙化。因此,本发明实施例中通过采用高温对光刻胶层进行处理,使得在剥离光刻胶层时增加了金属层表面的粗糙度,增加了后续在金属层表面进行构图时的附着力。另外,本发明实施例提供的薄膜晶体管的制作方法,包括:在衬底基板上形成氧化物半导体层和源漏金属层;对所述源漏金属层的表面进行粗糙化处理;对经过粗糙化处理的源漏金属层以及氧化物半导体层进行构图工艺,形成源漏电极的图案和有源层的图案。因此,本发明实施例中通过在源漏金属层的表面进行粗糙化处理之后,增加了源漏金属层表面的附着力,然后采用构图工艺在源漏金属层上进行涂覆光刻胶后,避免了光刻胶的脱落现象。
附图说明
图1为本发明实施例一提供的一种对金属层表面粗糙化处理的方法的流程示意图;
图2为本发明实施例二提供的一种薄膜晶体管的制作方法的流程示意图;
图3(a)-图3(h)分别为本发明实施例二提供的薄膜晶体管的制作方法执行每个步骤后得到的结构示意图;
图4为本发明实施例三提供的一种薄膜晶体管的结构示意图;
图5为本发明实施例四提供的一种阵列基板的结构示意图。
具体实施方式
为了使本发明的目的、技术方案和优点更加清楚,下面将结合附图对本发明作进一步地详细描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例,都属于本发明保护的范围。
本发明提供一种对金属层表面粗糙化处理的方法、薄膜晶体管及制作方法,通过对金属层表面进行粗糙化处理,使金属层表面变得粗糙,增加了后续在金属层表面进行构图时的附着力。
下面结合附图,对本发明实施例提供的薄膜晶体管及制作方法、阵列基板的具体实施方式进行详细地说明。
附图中各膜层的厚度和形状不反映真实比例,目的只是示意说明本发明内容。
实施例一
参见图1,本发明实施例提供的一种对金属层表面粗糙化处理的方法,包括:
S101、在金属层表面形成第一光刻胶层,并对第一光刻胶层进行高温处理;
S102、剥离第一光刻胶层,使金属层表面粗糙化。
本发明实施例提供的一种对金属层表面粗糙化处理的方法,包括:在金属层表面形成第一光刻胶层,并对第一光刻胶层进行高温处理;剥离第一光刻胶层,使金属层表面粗糙化。本发明实施例中通过采用高温对光刻胶层进行处理,使得在剥离第一光刻胶层时,不容易脱落,增加了金属层表面的粗糙度,使得在对金属层刻蚀时,避免光刻胶容易脱落的问题。因此,本发明实施例中通过采用高温对光刻胶层进行处理,使得在剥离光刻胶层时增加了金属层表面的粗糙度,增加了后续在金属层表面进行构图时的附着力。
在具体实施例中,本发明实施例提供的上述对金属层表面粗糙化处理的方法中,步骤S101对第一光刻胶层进行高温处理,包括:对第一光刻胶层进行前烘、曝光显影以及后烘处理。具体地,采用在金属层的表面涂覆一整层的第一光刻胶层,并对第一光刻胶进行前烘、曝光显影和后烘处理,并直接将第一光刻胶层进行剥离,使得在后烘处理的高温情况下剥离第一光刻胶层,使金属层表面变得粗糙,增加了后续在金属层表面进行构图时的附着力。
在具体实施例中,本发明实施例提供的上述对金属层表面粗糙化处理的方法中,后烘处理的温度为110°-150°。后烘处理的温度不能过高,避免光刻胶的融化,后烘处理的温度不能过低,否则起不到固定光刻胶层与金属层表面之间的附着力。较佳地,后烘处理的温度可以控制在110°-150°之间,但不限于仅控制在110°-150°之间,可以根据实际操作情况进行控制。另外,后烘处理的时间可以根据实际金属层的尺寸进行控制,较佳地,后烘处理的时间可以为100s到200s之间。
实施例二
一般地,在制作薄膜晶体管过程中,源漏金属层金属层一般为双层MoNb/Cu或三层MoNb/Cu/MoNb组成,当源漏金属层为三层结构时,与光刻胶紧密接触的MoNb与光刻胶的粘附性不好,使得光刻胶位于源漏金属层上方容易脱落,当刻蚀源漏金属层时,容易将对源漏电极的图形所对应的源漏金属层被刻蚀,使得后续在等离子体处理(plasma处理)时,造成Cu表面被氧化的问题。因此,源漏金属层的金属材料为MoNb/Cu/MoNb三层结构时,光刻胶在MoNb表面的粘附力较低,在进行后续工艺Cu刻蚀的时候会出现光刻胶脱落(PR Peeling)的问题。
有鉴于此,基于同一发明思想,参见图2,本发明实施例还提供的薄膜晶体管的制作方法,包括:
S201、在衬底基板上形成氧化物半导体层和源漏金属层;
其中,本发明实施例提供的薄膜晶体管可以为顶栅型结构,或者底栅型结构。针对底栅型结构的薄膜晶体管,在衬底基板上形成氧化物半导体层的图形之前,还可以包括在衬底基板上形成栅极和栅极绝缘层的图形。
S202、采用本发明是实例提供的上述任一种的对金属层表面粗糙化处理的方法对源漏金属层的表面进行粗糙化处理;
S203、对经过粗糙化处理的源漏金属层以及氧化物半导体层进行构图工艺,形成源漏电极的图案和有源层的图案。
其中,构图工艺可只包括光刻工艺,或,可以包括光刻工艺以及刻蚀步骤,同时还可以包括打印、喷墨等其他用于形成预定图形的工艺;光刻工艺是指包括成膜、曝光、显影等工艺过程的利用光刻胶、掩模板、曝光机等形成图形的工艺。在具体实施时,可根据本发明中所形成的结构选择相应的构图工艺。
本发明实施例提供的一种薄膜晶体管的制作方法,包括:在衬底基板上形成氧化物半导体层和源漏金属层;对所述源漏金属层的表面进行粗糙化处理;对经过粗糙化处理的源漏金属层以及氧化物半导体层进行构图工艺,形成源漏电极的图案和有源层的图案。因此,本发明实施例中通过在源漏金属层的表面进行粗糙化处理之后,增加了源漏金属层表面的附着力,然后采用构图工艺在源漏金属层上进行涂覆光刻胶后,避免了光刻胶的脱落现象。
在具体实施例中,本发明实施例提供的上述制作方法中,步骤S202对源漏金属层的表面进行粗糙化处理,包括:在源漏金属层之上形成第一光刻胶层;对第一光刻胶依次进行前烘、曝光显影以及后烘处理;剥离第一光刻胶层。具体地,采用构图工艺对源漏金属层和氧化物半导体层进行构图之前,采用在源漏金属层的表面涂覆一整层的第一光刻胶层,并对第一光刻胶进行前烘、曝光显影和后烘处理,并直接将第一光刻胶层进行剥离,使得在后烘处理的高温情况下剥离第一光刻胶层,使源漏金属层表面变得粗糙,增加了后续在源漏金属层表面进行构图时的附着力。
具体地,在对第一光刻胶层进行涂覆之前还包括对源漏金属层表面的清洗工艺。
在具体实施例中,本发明实施例提供的上述制作方法中,对经过粗糙化处理的源漏金属层以及氧化物半导体层进行构图工艺,形成源漏电极的图案和有源层的图案,包括:在经过粗糙处理后的源漏金属层之上形成第二光刻胶层;对第二光刻胶层进行曝光显影,形成第二光刻胶完全保留区域、第二光刻胶完全去除区域和第二光刻胶半保留区域,第二光刻胶半保留区域与沟道区域相对应,第二光刻胶完全保留区域与即将形成的源漏电极的图案相对应;对第二光刻胶完全去除区域所对应的源漏金属层和氧化物半导体层进行刻蚀,形成有源层的图形;灰化第二光刻胶层,使第二光刻胶层的半保留区域去除;对第二光刻胶半保留区域所对应的源漏金属层进行刻蚀,形成源漏电极的图案。
具体地,在对源漏金属层之上形成第二光刻胶层之前,还包括对经过粗糙化处理的源漏金属层进行清洗。然后在源漏金属层的表面涂覆一整层的第二光刻胶层,通过曝光显影的工艺,将不属于薄膜晶体管的区域的第二光刻胶层去除,完全保留源漏电极的图案所对应的区域,半保留沟道区域所对应的第二光刻胶层。其中,沟道区域是指形成源漏极图形后,位于源极和漏极之间的区域。
在具体实施例中,本发明实施例提供的上述制作方法中,显影第二光刻胶层之后,且对源漏金属层进行刻蚀之前,该方法还包括:对显影后的第二光刻胶层进行后烘处理。具体地,为了避免在对第二光刻胶完全去除区域所对应的源漏金属层进行刻蚀前,第二光刻胶半保留区域和第二光刻胶完全保留区域的光刻胶进行脱落,增加了后烘处理的步骤,进一步增加了第二光刻胶层与源漏金属层表面之间的附着力。
在具体实施例中,本发明实施例提供的上述制作方法中,灰化第二光刻胶层之后,且对第二光刻胶半保留区域所对应的源漏金属层进行刻蚀之前,该方法还包括:对灰化后的第二光刻胶层进行后烘处理。具体地,为了避免在对第二光刻胶半保留区域所对应的源漏金属层进行刻蚀前,第二光刻胶完全保留区域的光刻胶层进行脱落,增加了后烘处理的步骤,进一步增加了第二光刻胶层与源漏金属层表面之间的附着力。
在具体实施例中,本发明实施例提供的上述制作方法中,后烘处理的温度为110°-150°。较佳地,后烘处理的温度不能过高,避免光刻胶的融化,后烘处理的温度不能过低,否则起不到固定光刻胶层与源漏金属层表面之间的附着力。较佳地,后烘处理的温度可以控制在110°-150°之间,但不限于仅控制在110°-150°之间,可以根据实际操作情况进行控制。另外,后烘处理的时间可以根据实际制作薄膜晶体管的尺寸进行控制,较佳地,后烘处理的时间可以为100s到200s之间。
在具体实施例中,本发明实施例提供的上述制作方法中,对第二光刻胶完全去除区域所对应的源漏金属层和氧化物半导体层进行刻蚀时,采用的过蚀时间为刻蚀干净第二光刻胶完全去除区域所对应的源漏金属层和氧化物半导体层所用时长的5%-20%。
具体地,在对第二光刻胶完全去除区域所对应的源漏金属层进行刻蚀时,刻蚀干净第二光刻胶完全去除区域所对应的源漏金属层和氧化物半导体层所用的时长为m,为了保证进一步刻蚀干净第二光刻胶完全去除区域所对应的源漏金属层,在制作工艺中需要进行一段时间的过刻蚀,从而保证对不需要的部分刻蚀干净。因此,本发明实施例中的过蚀时间,是指在刻蚀干净需要刻蚀的部分的膜层后另外增加的刻蚀时长。进一步,为了避免过蚀时间太长,导致源漏电极层的断线或者光刻胶的脱落,较佳地,采用的过蚀时间为刻蚀干净第二光刻胶完全去除区域所对应的源漏金属层所用时长的5%-20%。同理,在对源漏金属层下面的氧化物半导体层进行刻蚀时,所采用的过蚀时间为刻蚀干净第二光刻胶完全去除区域所对应的氧化物半导体层所用时长的5%-20%。
在具体实施例中,本发明实施例提供的上述制作方法中,对第二光刻胶半保留区域所对应的源漏金属层进行刻蚀时,采用的过蚀时间为刻蚀干净第二光刻胶半保留区域所对应的源漏金属层所用时长0%-20%。
具体地,在对第二光刻胶半保留区域所对应的源漏金属层进行刻蚀时,刻蚀干净第二光刻胶半保留区域所对应的源漏金属层所用的时长为n,为了保证进一步刻蚀干净第二光刻胶半保留区域所对应的源漏金属层,在制作工作中需要进行过刻蚀,从而保证对不需要的部分刻蚀干净。因此,本发明实施例中的过蚀时间,是指在刻蚀干净需要刻蚀的部分的膜层后另外增加的刻蚀时长,。进一步为了避免过蚀时间太长,导致源漏电极层的断线或者光刻胶的脱落。较佳地,在对第二光刻胶半保留区域所对应的源漏金属层进行刻蚀时,可以不进行过刻蚀,即采用的过蚀时间为刻蚀干净第二光刻胶半保留区域所对应的源漏金属层所用时长的0%;或者,在对第二光刻胶半保留区域所对应的源漏金属层进行刻蚀时,可以对膜层进行过刻蚀,采用的过蚀时间为小于刻蚀干净第二光刻胶半保留区域所对应的源漏金属层所用时长的20%。
在具体实施例中,本发明实施例提供的上述制作方法中,形成源漏电极的图案之后,该方法还包括:剥离第二光刻胶层。
下面通过具体实施例详细描述本发明实施例提供的薄膜晶体管的制作方法。其中,薄膜晶体管的结构以底栅型结构为例。
步骤一、在衬底基板00上依次形成栅极01、栅极绝缘层02的图形,氧化物半导体层03以及位于氧化物半导体层03上方的源漏极金属层04,如图3(a)所示;
步骤二、在源漏金属层04表面形成第一光刻胶层05,如图3(b)所示;
步骤三、对第一光刻胶层05进行前烘、曝光显影后烘处理后,剥离第一光刻胶层05,使得源漏金属层表面变得粗糙,如图3(c)所示;
步骤四、在经过粗糙化处理之后的源漏金属层表面涂覆第二光刻胶层06,如图3(d)所示;
步骤五、对第二光刻胶层06进行曝光显影,形成第二光刻胶完全保留区域061、第二光刻胶完全去除区域062和第二光刻胶半保留区域063,第二光刻胶半保留区域063与沟道区域相对应,第二光刻胶完全保留区域061与即将形成的源漏电极的图案相对应,如图3(e)所示;
步骤六、对第二光刻胶层06进行后烘处理,后烘处理的温度为110°-150°;
步骤七、对第二光刻胶完全去除区域062所对应的源漏金属层和氧化物半导体层进行刻蚀,形成有源层031的图形,如图3(f)所示;
步骤八、对第二光刻胶层06进行后烘处理,后烘处理的温度为110°-150°;
步骤九、灰化第二光刻胶层06,使第二光刻胶半保留区域063的光刻胶层完全去除,并对第二光刻胶半保留区域所对应的源漏金属层04进行刻蚀,形成源电极041和漏电极042的图案,如图3(g)所示;
步骤十、剥离第二光刻胶层,如图3(h)所示。
通过上述步骤形成薄膜晶体管中每个膜层的结构均需要采用构图工艺进行构图。构图工艺可只包括光刻工艺,或,可以包括光刻工艺以及刻蚀步骤,同时还可以包括打印、喷墨等其他用于形成预定图形的工艺;光刻工艺是指包括成膜、曝光、显影等工艺过程的利用光刻胶、掩模板、曝光机等形成图形的工艺。在具体实施时,可根据本发明中所形成的结构选择相应的构图工艺。
实施例三
基于同一发明思想,本发明实施例还提供了一种薄膜晶体管,包括采用本发明实施例提供的任一种的薄膜晶体管的制作方法制作的薄膜晶体管。
具体地,参见图4所示,本发明实施例提供了一种薄膜晶体管,包括衬底基板00,位于衬底基板00上层叠设置的栅极01、栅极绝缘层02、有源层031;薄膜晶体管还包括位于有源层031上方且与有源层电性相连的源电极041和漏电极042,以及位于源电极041和漏电极042上方的绝缘层07。
需要说明的是,本发明实施例提供的薄膜晶体管也可以采用上述薄膜晶体管的制作方法进行制作。且薄膜晶体管的实施例可以参见上述薄膜晶体管的制作方法,重复之处不再赘述。
实施例四
基于同一发明思想,参见图5,本发明实施例还提供了一种阵列基板,包括本发明实施例提供的薄膜晶体管1。
其中,阵列基板中的薄膜晶体管包括如图3所示的薄膜晶体管的结构。
在具体实施例中,参见图5,本发明实施例提供的上述阵列基板中,还包括:位于绝缘层07上方层叠设置的平坦层08、公共电极层09、钝化层10和像素电极层11,其中,钝化层10中包括贯穿钝化层、平坦层、绝缘层用于连接像素电极和漏极的过孔12。
其中,过孔12可以在形成钝化层之后,通过一次刻蚀形成过孔的形状,从而进一步简化了掩膜版的个数以及掩膜版的复杂度。
具体地,本发明实施例提供的上述阵列基板可以应用于液晶显示面板,也可以应用于有机电致发光显示面板,在此不作限定。
当上述阵列基板应用于液晶显示面板时,像素电极指液晶显示面板中的像素电极,当上述阵列基板应用于有机电致发光显示面板时,像素电极可以指有机电极发光像素结构中的阴极层或阳极层。
综上所述,本发明实施例提供的一种对金属层表面粗糙化处理的方法,包括:在金属层表面形成第一光刻胶层,并对所述第一光刻胶层进行高温处理;剥离所述第一光刻胶层,使所述金属层表面粗糙化。因此,本发明实施例中通过采用高温对光刻胶层进行处理,使得在剥离光刻胶层时增加了金属层表面的粗糙度,增加了后续在金属层表面进行构图时的附着力。另外,本发明实施例提供的一种薄膜晶体管的制作方法,包括:在衬底基板上形成氧化物半导体层和源漏金属层;对所述源漏金属层的表面进行粗糙化处理;对经过粗糙化处理的源漏金属层以及氧化物半导体层进行构图工艺,形成源漏电极的图案和有源层的图案。因此,本发明实施例中通过在源漏金属层的表面进行粗糙化处理之后,增加了源漏金属层表面的附着力,然后采用构图工艺在源漏金属层上进行涂覆光刻胶后,避免了光刻胶的脱落现象。
显然,本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变型在内。

Claims (11)

1.一种对金属层表面粗糙化处理的方法,其特征在于,该方法包括:
在金属层表面形成第一光刻胶层,并对所述第一光刻胶层进行高温处理;
剥离所述第一光刻胶层,使所述金属层表面粗糙化。
2.根据权利要求1所述的方法,其特征在于,对所述第一光刻胶层进行高温处理,包括:
对所述第一光刻胶层进行前烘、曝光显影以及后烘处理。
3.根据权利要求2所述的方法,其特征在于,所述后烘处理的温度为110°-150°。
4.一种薄膜晶体管的制作方法,其特征在于,该方法包括:
在衬底基板上形成氧化物半导体层和源漏金属层;
采用权利要求1-3任一权项所述的对金属层表面粗糙化处理的方法对所述源漏金属层进行粗糙化处理;
对经过粗糙化处理的源漏金属层以及氧化物半导体层进行构图工艺,形成源漏电极的图案和有源层的图案。
5.根据权利要求4所述的方法,其特征在于,对经过粗糙化处理的源漏金属层以及氧化物半导体层进行构图工艺,形成源漏电极的图案和有源层的图案,包括:
在经过粗糙处理后的源漏金属层之上形成第二光刻胶层;
对所述第二光刻胶层进行曝光显影,形成第二光刻胶完全保留区域、第二光刻胶完全去除区域和第二光刻胶半保留区域,所述第二光刻胶半保留区域与沟道区域相对应,所述第二光刻胶完全保留区域与即将形成的源漏电极的图案相对应;
对所述第二光刻胶完全去除区域所对应的源漏金属层和氧化物半导体层进行刻蚀,形成有源层的图形;
灰化所述第二光刻胶层,使所述第二光刻胶层的半保留区域去除;
对所述第二光刻胶半保留区域所对应的源漏金属层进行刻蚀,形成源漏电极的图案。
6.根据权利要求5所述的方法,其特征在于,显影所述第二光刻胶层之后,且对所述源漏金属层进行刻蚀之前,该方法还包括:
对显影后的第二光刻胶层进行后烘处理。
7.根据权利要求5所述的方法,其特征在于,灰化所述第二光刻胶层之后,且对所述第二光刻胶半保留区域所对应的源漏金属层进行刻蚀之前,该方法还包括:
对灰化后的第二光刻胶层进行后烘处理。
8.根据权利要求5所述的方法,其特征在于,对所述第二光刻胶完全去除区域所对应的源漏金属层和氧化物半导体层进行刻蚀时,采用的过蚀时间为刻蚀干净所述第二光刻胶完全去除区域所对应的源漏金属层和氧化物半导体层所用时长的5%-20%。
9.根据权利要求5所述的方法,其特征在于,对所述第二光刻胶半保留区域所对应的源漏金属层进行刻蚀时,采用的过蚀时间为刻蚀干净所述第二光刻胶半保留区域所对应的源漏金属层所用时长0%-20%。
10.一种薄膜晶体管,其特征在于,包括采用权利要求4-9任一权项所述的薄膜晶体管的制作方法制作的薄膜晶体管。
11.一种阵列基板,其特征在于,包括权利要求10所述的薄膜晶体管。
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