WO2015085605A1 - 一种igzo电晶体结构及其制造方法 - Google Patents
一种igzo电晶体结构及其制造方法 Download PDFInfo
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- WO2015085605A1 WO2015085605A1 PCT/CN2013/089623 CN2013089623W WO2015085605A1 WO 2015085605 A1 WO2015085605 A1 WO 2015085605A1 CN 2013089623 W CN2013089623 W CN 2013089623W WO 2015085605 A1 WO2015085605 A1 WO 2015085605A1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D99/00—Subject matter not provided for in other groups of this subclass
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/67—Thin-film transistors [TFT]
- H10D30/674—Thin-film transistors [TFT] characterised by the active materials
- H10D30/6755—Oxide semiconductors, e.g. zinc oxide, copper aluminium oxide or cadmium stannate
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/67—Thin-film transistors [TFT]
- H10D30/6757—Thin-film transistors [TFT] characterised by the structure of the channel, e.g. transverse or longitudinal shape or doping profile
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/10—Shapes, relative sizes or dispositions of the regions of the semiconductor bodies; Shapes of the semiconductor bodies
- H10D62/17—Semiconductor regions connected to electrodes not carrying current to be rectified, amplified or switched, e.g. channel regions
- H10D62/351—Substrate regions of field-effect devices
- H10D62/357—Substrate regions of field-effect devices of FETs
- H10D62/364—Substrate regions of field-effect devices of FETs of IGFETs
- H10D62/371—Inactive supplementary semiconductor regions, e.g. for preventing punch-through, improving capacity effect or leakage current
Definitions
- the present invention relates to the field of image display, and more particularly to an IGZO transistor structure and a method of fabricating the same.
- Thin film field effect transistors based on oxide semiconductors are hotspots in the field of display in the future, and have been extensively researched and developed in recent years.
- the amorphous indium gallium zinc oxide (a-IGZO) film as an active channel layer can have a mobility of up to 80 cm 2 /Vs (amorphous silicon a-Si mobility is only 0.5 to 0.8 cm 2 /Vs), and Compatible with a-Si large-volume production process. Therefore, indium gallium zinc oxide semiconductor IGZO is a potential application for next-generation liquid crystal displays (LCDs) and organic light-emitting diodes (OLEDs).
- LCDs liquid crystal displays
- OLEDs organic light-emitting diodes
- the semiconductor band When the metal is in contact with the IGZO, the semiconductor band is bent at the interface to form a barrier. The presence of a barrier results in a large interface resistance, ie Schottky Schottky contact.
- the Schottky resistor causes the on-state current of the TFT component to be insufficient, the Subthreshold Swing (SS) is too large, and the stability of the component is degraded, thereby affecting the picture display quality. Therefore, reducing the contact resistance of metal and IGZO to form an ohmic Ohmic contact is an important factor in determining the performance of a semiconductor device.
- One of the methods for forming good ohmic contact is to heavily dope (n+IGZO) in the semiconductor region in contact with the metal, so that the depletion region of the interface is narrowed, and electrons have more opportunities for direct tunneling (tunneling).
- 1 is a schematic diagram of a top gate Bottom Contact structure of a standard TFT, including a substrate V, a source 1', a drain y, a gate 4', an insulating layer 5', and an IGZO pattern layer 6'.
- 2 is a schematic view of a heavily doped top gate bottom contact structure in which an n+IGZO region 7' is formed in a region where the source/drain contacts the IGZO pattern layer 6'.
- the protection of the IGZO channel is neglected, and the IGZO channel is easily damaged, affecting the performance of the ohmic contact.
- the technical problem to be solved by the present invention is to provide an IGZO transistor structure and a method of fabricating the same, which avoids damage to the IGZO channel during N-type doping of IGZO by plasma treatment.
- the present invention provides a method for fabricating an IGZO transistor, comprising: preparing a source/drain pattern layer and an IGZO pattern layer on a substrate; preparing a protective layer at the IGZO channel; and treating the source by plasma processing
- the /drain electrode and the IGZO contact region are N-doped to form an n+IGZO region; and a gate insulating layer and a gate pattern layer are prepared.
- the preparing the protective layer at the IGZO channel further comprises: forming a silicon oxide film by chemical vapor deposition CVD on the source/drain pattern layer and the IGZO pattern layer; performing photoresist on the silicon oxide film Coating; exposure and development under a mask; etching of the unprotected area of the photoresist; photoresist stripping to form a protective layer pattern.
- the present invention also provides a method for fabricating an indium gallium zinc oxide semiconductor IGZO transistor, comprising: preparing a source/drain pattern layer on a substrate; performing IGZO film formation and coating photoresist on the source/drain pattern layer Exposing the photoresist with a halftone mask to form a protective photoresist at the IGZO channel; N-type doping the source/drain electrode and the IGZO contact region by plasma treatment to form an n+IGZO region; A gate insulating layer and a gate pattern layer are prepared.
- the exposing the photoresist by using a halftone mask to form a protective photoresist at the IGZO channel further comprises: exposing the photoresist portion of the source/drain and the semiconductor contact region by using a halftone mask, and The photoresist at the IGZO channel is not exposed; and after the IGZO is patterned by wet etching, the photoresist of the source/drain and the semiconductor contact region is etched away by dry etching, and the photoresist at the IGZO channel is thinned to form Protective photoresist.
- the present invention also provides an IGZO transistor structure, comprising: a source, a drain, and an IGZO disposed on a substrate; a protective layer overlying the IGZO channel; the source, the drain, and the IGZO The n+ IGZO region formed by the N-type doping of the contact region; a protective layer and a gate insulating layer over the n+IGZO region; and a gate disposed on the gate insulating layer.
- the protective layer is silicon oxide.
- the IGZO transistor structure and the manufacturing method thereof provided by the present invention can avoid damage to the IGZO channel during N-type doping of IGZO by plasma treatment, thereby contributing to improvement of ohmic contact and improvement of device characteristics.
- Fig. 1 is a schematic view showing the top gate bottom contact structure of a standard TFT.
- FIG. 2 is a schematic view of a heavily doped top gate bottom contact structure.
- Fig. 3 is a flow chart showing a method of manufacturing an IGZO transistor according to an embodiment of the present invention.
- FIG. 4 is a schematic flow chart of a method for fabricating an IGZO transistor according to a second embodiment of the present invention.
- Fig. 5 is a schematic view showing the structure of a third IGZO transistor according to an embodiment of the present invention.
- a first embodiment of the present invention provides a method for manufacturing an indium gallium zinc oxide semiconductor IGZO transistor, including:
- Step S21 preparing a source 2 (Source), a drain 3 (Drain) pattern layer, and an IGZO pattern layer 6 on the substrate 1;
- Step S22 preparing a protective layer 8 at the IGZO channel
- Step S23 performing N-type doping of the source/drain electrodes and the IGZO contact region by plasma treatment to form an n+IGZO region 7;
- Step S24 preparing a gate insulating layer 5 (GI) and a gate 4 (gate) pattern layer.
- a Protect Layer (PL) process is added to protect the IGZO channel.
- the step S22 of preparing the protective layer further includes:
- Step S221 using chemical vapor deposition on the source/drain pattern layer and the IGZO pattern layer (Chemical Vapor Deposition, CVD) depositing a silicon oxide (SiOx) film; step S222, performing photoresist coating on the SiOx film;
- CVD Chemical Vapor Deposition, CVD
- the SiOx film on the IGZO channel is protected by photoresist, and other areas are exposed, without photoresist protection;
- Step S224 etching an unprotected area of the photoresist
- Step S225 peeling off the photoresist to form a protective layer pattern.
- a protective layer is introduced in the process to prevent damage to the IGZO channel during plasma processing, and plasma enhanced chemical vapor deposition (PECVD) is also ensured in the subsequent preparation of the GI layer.
- PECVD plasma enhanced chemical vapor deposition
- the film also does not damage the IGZO channel.
- the protective layer is prepared, it will not be peeled off, and the IGZO channel can be protected from damage during subsequent processes. At the same time, since the channel is already protected, the subsequent tact time of the passivation layer will be greatly reduced.
- a second embodiment of the present invention provides a method for manufacturing an indium gallium zinc oxide semiconductor IGZO transistor, including:
- Step S31 preparing a source 2 (Source), a drain 3 (Drain) pattern layer on the substrate 1;
- Step S32 performing IGZO 6 film formation and coating photoresist on the source/drain pattern layer 9;
- Step S33 exposing the photoresist with a half-tone mask, forming a protective photoresist 90 at the IGZO channel;
- Step S34 performing plasma processing on the source/drain and IGZO contact regions to form an n+IGZO region i or 7;
- Step S35 preparing a gate insulating layer 5 (GI) and a gate 4 (gate) pattern layer.
- step S33 further includes:
- Step S331 exposing the photoresist portion of the source/drain and the semiconductor contact region by using a halftone mask, so that the photoresist at the IGZO channel is not exposed;
- Step S332 after the IGZO is patterned by wet etching, the photoresist of the source/drain and the semiconductor contact region is etched away by dry etching, and the photoresist at the IGZO channel is thinned to form a protective photoresist.
- step S331 the exposed portion of the photoresist is thinned, and the photoresist at the IGZO channel is not exposed, and its thickness is thicker relative to the exposed portion.
- step S332 the IGZO groove is etched.
- the photoresist at the track is thinned to form a protective photoresist that acts to protect the IGZO channel.
- step S341 is further included to peel off the photoresist.
- the photoresist at the IGZO channel is not exposed, a protective photoresist is formed during etching, and the IGZO channel is protected during plasma processing.
- SiOx is used as a protective layer, and a protective layer process is required to perform plasma processing of IGZO, so that one more mask, that is, one more film forming, yellow light, and etching process.
- a halftone mask is used, that is, a partial exposure is strong, a part of the exposure is weak, and the remaining is not exposed; the strong exposure portion has no photoresist protection, and is etched to form an IGZO pattern; The photoresist is very thin. Before plasma treatment, it can be ashed with 02 Plasma, and the exposed area is exposed, and then plasma treatment is performed. Therefore, the plasma treatment of IGZO pattern layer and IGZO can be completed by one process, one less.
- the mask eliminates one film formation, yellow light, and etching process, which greatly reduces production costs and increases production capacity.
- the IGZO in contact with the metal inside the IGZO channel can be plasma-treated to improve the ohmic contact.
- Embodiment 3 of the present invention provides an IGZO transistor structure, including:
- the source 2, the drain 3 and the IGZO 6 are disposed on the substrate 1;
- n+IGZO region 7 formed by N-type doping at the source 2, the drain 3 and the IGZO 6 contact region;
- a gate insulating layer 5 disposed over the protective layer 8 and the n+IGZO region 7; and a gate electrode 4 disposed on the gate insulating layer 5.
- the protective layer 8 is silicon oxide.
- the protective layer 8 since the protective layer 8 is disposed over the IGZO 6 channel in the IGZO transistor structure, damage to the IGZO 6 channel during plasma processing can be prevented, and the PECVD film formation does not damage the IGZO 6 trench. Road.
- the protective layer 8 after the protective layer 8 is prepared, it will not be peeled off, and the IGZO 6 channel can be protected from damage during the subsequent process.
- the subsequent passivation layer will also have a large tact time. Greatly reduced.
- the IGZO transistor structure and the manufacturing method thereof provided by the present invention can avoid damage to the IGZO channel during N-type doping of IGZO by plasma treatment, thereby contributing to improvement of ohmic contact and improvement of device characteristics.
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Abstract
提供一种IGZO电晶体及其制造方法,其中IGZO电晶体制造方法包括:在基板上制备源/漏极图案层和IGZO图案层;在IGZO沟道处制备保护层;通过等离子处理对所述源/漏电极与IGZO接触区域进行N型掺杂,形成n+IGZO区域;以及制备栅极绝缘层和栅极图案层。其能够避免在通过等离子处理对IGZO进行N型掺杂过程中损害IGZO沟道,有助于改善欧姆接触,提高元件特性。
Description
一种 IGZO电晶体结构及其制造方法
本申请要求于 2013 年 12 月 9 日提交中国专利局、 申请号为 201310657960.0、 发明名称为 "一种 IGZO电晶体结构及其制造方法、 显示 面板" 的中国专利申请的优先权, 上述专利的全部内容通过引用结合在本申 请中。 技术领域
本发明涉及图像显示领域, 尤其涉及一种 IGZO电晶体结构及其制造方 法。
背景技术
基于氧化物半导体的薄膜场效应晶体管 ( TFT )是未来显示领域的热点, 近年来得到了广泛的研究和发展。 其中, 作为有源沟道层的无定形铟镓锌氧 化合物 (a-IGZO ) 薄膜, 迁移率可高达 80cm2/Vs (非晶硅 a-Si 迁移率仅 0.5〜0.8cm2/Vs ), 并且可与 a-Si大尺寸量产制程兼容。 因此, 铟镓锌氧化物 半导体 IGZO在下一代液晶显示(LCD )和有机发光二极管 (OLED ) 的潜 在应用。
金属和 IGZO相接触时, 在界面处半导体能带弯曲, 形成势垒。 势垒的 存在会导致大的界面电阻,即肖特基 Schottky接触。 Schottky电阻会导致 TFT 元件开态电流不足, 亚阈值摆幅(Subthreshold Swing, SS )过大, 元件稳定 性下降, 从而影响画面显示品质。 所以, 降低金属和 IGZO的接触电阻, 形 成欧姆 Ohmic接触,是决定半导体元件性能好坏的一个重要因素。 良好的欧 姆接触形成的方法之一是在与金属接触的半导体区域进行重掺杂 ( n+IGZO ),使得界面的空乏区变窄,电子有更多的机会直穿隧(穿隧效应)。 图 1为标准 TFT的顶栅底接触 ( Top Gate Bottom Contact )结构示意图, 包 括基板 V、 源极 1'、 漏极 y、 栅极 4'、 绝缘层 5' 以及 IGZO图案层 6' 。 图 2为经过重掺杂的顶栅底接触结构示意图,其中在源 /漏极与 IGZO图案层 6' 相接触的区域形成了 n+IGZO区域 7' 。
然而, 在现有的制造方法中, 尤其是在通过等离子处理对 IGZO进行 N 型掺杂时, 忽略了对 IGZO沟道的保护, 极易损害 IGZO沟道, 影响欧姆接 触的效能。
发明内容
本发明所要解决的技术问题在于, 提供一种 IGZO电晶体结构及其制造 方法, 避免在通过等离子处理对 IGZO进行 N型掺杂过程中, 损害 IGZO沟 道。
为了解决上述技术问题,本发明提供一种 IGZO电晶体制造方法, 包括: 在基板上制备源 /漏极图案层和 IGZO图案层; 在 IGZO沟道处制备保护层; 通过等离子处理对所述源 /漏电极与 IGZO接触区域进行 N 型掺杂, 形成 n+IGZO区域; 以及制备栅极绝缘层和栅极图案层。
其中, 所述在 IGZO沟道处制备保护层进一步包括: 在所述源 /漏极图案 层和 IGZO图案层上利用化学气相沉积 CVD沉积形成氧化硅薄膜; 在所述 氧化硅薄膜上进行光阻涂布; 在掩膜下曝光及显影; 对光阻未保护的区域进 行刻蚀; 光阻剥离形成保护层图形。
本发明还提供一种铟镓锌氧化物半导体 IGZO电晶体制造方法, 包括: 在基板上制备源 /漏极图案层; 在所述源 /漏极图案层上进行 IGZO成膜和涂 布光阻;采用半色调光罩对光阻进行曝光,在 IGZO沟道处形成保护性光阻; 通过等离子处理对所述源 /漏电极与 IGZO接触区域进行 N 型掺杂, 形成 n+IGZO区域; 以及制备栅极绝缘层和栅极图案层。
其中, 所述采用半色调光罩对光阻进行曝光, 在 IGZO沟道处形成保护 性光阻,进一步包括: 采用半色调光罩对源 /漏极与半导体接触区域的光阻部 分曝光, 而使 IGZO沟道处光阻不曝光; 以及用湿刻使 IGZO形成图形后, 用干刻将源 /漏极与半导体接触区域的光阻刻蚀掉, IGZO沟道处的光阻变薄, 形成保护性光阻。
其中,在形成 n+IGZO区域之后,还包括将所述保护性光阻剥离的步骤。 本发明还提供一种 IGZO电晶体结构, 包括: 设置在基板上的源极、 漏 极以及 IGZO; 覆盖在所述 IGZO沟道上方的保护层; 在所述源极、 漏极与 所述 IGZO接触区域进行 N型掺杂而形成的 n+IGZO区域; 设置在所述保
护层以及 n+IGZO区域上方的栅极绝缘层; 以及设置在所述栅极绝缘层上的 栅极。
其中, 所述保护层为氧化硅。
本发明所提供的 IGZO电晶体结构及其制造方法, 能够避免在通过等离 子处理对 IGZO进行 N型掺杂过程中损害 IGZO沟道,有助于改善欧姆接触, 提高元件特性。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对实 施例或现有技术描述中所需要使用的附图作简单地介绍, 显而易见地, 下面 描述中的附图仅仅是本发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出创造性劳动的前提下, 还可以根据这些附图获得其他的附图。
图 1是标准 TFT的顶栅底接触结构示意图。
图 2是经重掺杂的顶栅底接触结构示意图。
图 3是本发明实施例一 IGZO电晶体制造方法的流程示意图。
图 4是本发明实施例二 IGZO电晶体制造方法的流程示意图。
图 5是本发明实施例三 IGZO电晶体结构示意图。
具体实施方式
下面参考附图对本发明的优选实施例进行描述。
请参照图 3所示, 本发明实施例一提供一种铟镓锌氧化物半导体 IGZO 电晶体制造方法, 包括:
步骤 S21 , 在基板 1上制备源极 2 ( Source ), 漏极 3 ( Drain ) 图案层, 以及 IGZO图案层 6;
步骤 S22, 在 IGZO沟道处制备保护层 8;
步骤 S23 , 通过等离子处理 ( Plasma Treatment )对源 /漏电极与 IGZO接 触区域进行 N型掺杂, 形成 n+IGZO区域 7; 以及
步骤 S24, 制备栅极绝缘层 5 ( GI )和栅极 4 ( Gate ) 图案层。
本实施例增加了保护层(Protect Layer, PL )制程, 对 IGZO沟道进行 保护。 具体的, 步骤 S22制备保护层进一步包括:
步骤 S221 , 在源 /漏极图案层和 IGZO 图案层上利用化学气相沉积
( Chemical Vapor Deposition, CVD )沉积形成氧化硅 ( SiOx ) 薄膜; 步骤 S222, 在 SiOx薄膜上进行光阻涂布;
步骤 S223 , 在掩膜下曝光及显影;
曝光及显影后的结果是, IGZO沟道上面的 SiOx薄膜被光阻保护, 其他 区域则棵露, 无光阻保护;
步骤 S224 , 对光阻未保护的区域进行刻蚀;
步骤 S225, 将光阻剥离形成保护层图形。
本实施例在制程中引入了制备保护层, 防止在等离子处理过程中对 IGZO沟道的损害,也保证了后续制备 GI层时, 等离子体增强化学气相沉积 ( Plasma Enhanced Chemical Vapor Deposition, PECVD )成膜也不会损害到 IGZO沟道。 另外, 保护层制备完成后, 不会被剥离, 后续制程中一直可以 保护 IGZO 沟道不被损害。 同时, 由于沟道已经得到保护, 后续的钝化层 ( Passivation Layer ) 的产线节拍时间 (tact time )也将大大降低。
再请参照图 4所示,本发明实施例二提供一种铟镓锌氧化物半导体 IGZO 电晶体制造方法, 包括:
步骤 S31 , 在基板 1上制备源极 2 ( Source ), 漏极 3 ( Drain ) 图案层; 步骤 S32, 在源 /漏极图案层上进行 IGZO 6成膜和涂布光阻 9;
步骤 S33 , 采用半色调 (half-tone )光罩对光阻进行曝光, 在 IGZO沟 道处形成保护性光阻 90;
步骤 S34, 对源 /漏极与 IGZO接触区域进行等离子处理, 形成 n+IGZO 区 i或 7; 以及
步骤 S35, 制备栅极绝缘层 5 ( GI )和栅极 4 ( Gate ) 图案层。
具体的, 步骤 S33进一步包括:
步骤 S331 , 采用半色调光罩对源 /漏极与半导体接触区域的光阻部分曝 光, 而使 IGZO沟道处光阻不曝光; 以及
步骤 S332, 用湿刻使 IGZO形成图形后, 用干刻将源 /漏极与半导体接 触区域的光阻刻蚀掉, IGZO沟道处的光阻变薄, 形成保护性光阻。
上述步骤 S331 中, 被曝光的部分光阻减薄, 而 IGZO沟道处光阻未曝 光, 其厚度相对于被曝光部分较厚。 上述步骤 S332中, 在刻蚀时 IGZO沟
道处的光阻变薄,从而形成保护性光阻,起到对 IGZO沟道进行保护的作用。 在步骤 S34之后, 还包括步骤 S341 , 将光阻剥离。
本实施例通过采用半色调光罩曝光, 使 IGZO沟道处的光阻不曝光, 在 刻蚀时得以形成保护性光阻, 在等离子处理过程中对 IGZO沟道起到保护作 用。
本发明实施例一采用 SiOx做保护层, 需要增加一道保护层制程, 才能 进行 IGZO的等离子处理, 所以多一道光罩, 即多一次的成膜, 黄光, 刻蚀 制程。 本发明实施例二与之相比, 采用半色调光罩, 即部分曝光强, 部分曝 光弱, 剩下的不曝光; 强曝光部分没有光阻保护, 进行刻蚀形成 IGZO图形; 部分曝光部分由于光阻很薄,进行等离子处理前可用 02 Plasma先将其灰化, 棵露出要处理的区域,然后进行等离子处理即可,所以 IGZO图案层和 IGZO 的等离子处理用一道制程即可完成, 少一道光罩, 省去一次成膜, 黄光, 刻 蚀过程, 大大降低生产成本, 增加生产产能。
另外, 按照本发明实施例二的方法, 还可将 IGZO沟道内侧与金属接触 的 IGZO进行等离子处理, 达到改善欧姆接触的目的。
请再参照图 5所示, 相应于本发明实施例一, 本发明实施例三提供一种 IGZO电晶体结构, 包括:
设置在基板 1的源极 2、 漏极 3以及 IGZO 6;
覆盖在 IGZO 6沟道上方的保护层 8;
在源极 2、 漏极 3与 IGZO 6接触区域进行 N型掺杂而形成的 n+IGZO 区域 7;
设置在保护层 8以及 n+IGZO区域 7上方的栅极绝缘层 5; 以及 设置在栅极绝缘层 5上的栅极 4。
其中, 保护层 8为氧化硅。
本实施例中, 由于在 IGZO电晶体结构中的 IGZO 6沟道上方设置了保 护层 8, 可以防止在等离子处理过程中对 IGZO 6沟道的损害, PECVD成膜 也不会损害到 IGZO 6沟道。 另外, 保护层 8制备完成后, 不会被剥离, 后 续制程中一直可以保护 IGZO 6沟道不被损害。 同时, 由于沟道已经得到保 护, 后续的钝化层( Passivation Layer ) 的产线节拍时间 ( tact time )也将大
大降低。
本发明所提供的 IGZO电晶体结构及其制造方法, 能够避免在通过等离 子处理对 IGZO进行 N型掺杂过程中损害 IGZO沟道,有助于改善欧姆接触, 提高元件特性。
以上所揭露的仅为本发明较佳实施例而已, 当然不能以此来限定本发明 之权利范围, 因此依本发明权利要求所作的等同变化, 仍属本发明所涵盖的 范围。
Claims
1、 一种 IGZ0电晶体制造方法, 包括:
在基板上制备源 /漏极图案层和 IGZ0图案层;
在 IGZO沟道处制备保护层;
通过等离子处理对所述源 /漏电极与 IGZO接触区域进行 N型掺杂, 形 成 n+IGZO区域; 以及
制备栅极绝缘层和栅极图案层。
2、 根据权利要求 1所述的制造方法, 其中, 所述在 IGZO沟道处制备 保护层进一步包括:
在所述源 /漏极图案层和 IGZO图案层上利用化学气相沉积 CVD沉积形 成氧化硅薄膜;
在所述氧化硅薄膜上进行光阻涂布;
在掩膜下曝光及显影;
对光阻未保护的区域进行刻蚀;
光阻剥离形成保护层图形。
3、 一种 IGZO电晶体制造方法, 包括:
在基板上制备源 /漏极图案层;
在所述源 /漏极图案层上进行 IGZO成膜和涂布光阻;
采用半色调光罩对光阻进行曝光, 在 IGZO沟道处形成保护性光阻; 通过等离子处理对所述源 /漏电极与 IGZO接触区域进行 N型掺杂, 形 成 n+IGZO区域; 以及
制备栅极绝缘层和栅极图案层。
4、 根据权利要求 3所述的制造方法, 其中, 所述采用半色调光罩对光 阻进行曝光, 在 IGZO沟道处形成保护性光阻, 进一步包括:
采用半色调光罩对源 /漏极与半导体接触区域的光阻部分曝光, 而使 IGZO沟道处光阻不曝光; 以及
用湿刻使 IGZO形成图形后,用干刻将源 /漏极与半导体接触区域的光阻 刻蚀掉, IGZO沟道处的光阻变薄, 形成保护性光阻。
5、 根据权利要求 4所述的制造方法, 其中, 在形成 n+IGZO区域之后,
还包括将所述保护性光阻剥离的步骤。
6、 一种 IGZO电晶体结构, 其中, 包括:
设置在基板( 1 ) 上的源极( 2 )、 漏极( 3 ) 以及 IGZO ( 6 );
覆盖在所述 IGZO (6) 沟道上方的保护层(8);
在所述源极 ( 2 )、 漏极( 3 )与所述 IGZO ( 6 )接触区域进行 N型掺 杂而形成的 n+IGZO区域( Ί );
设置在所述保护层( 8 )以及 n+IGZO区域( 7 )上方的栅极绝缘层( 5 ); 以及
设置在所述栅极绝缘层 (5 )上的栅极(4)。
7、 根据权利要求 6所述的 IGZO电晶体结构, 其中, 所述保护层(8) 为氧化硅。
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| CN104409635B (zh) | 2014-12-16 | 2017-02-22 | 京东方科技集团股份有限公司 | 一种有机薄膜晶体管及其制作方法、阵列基板、显示装置 |
| CN106030821B (zh) * | 2015-02-12 | 2019-11-12 | 深圳市柔宇科技有限公司 | 顶栅薄膜晶体管、阵列基板及其制造方法以及tft器件 |
| CN116888737A (zh) | 2021-06-24 | 2023-10-13 | 京东方科技集团股份有限公司 | 阵列基板及其制备方法和显示面板 |
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| CN102655165A (zh) * | 2011-03-28 | 2012-09-05 | 京东方科技集团股份有限公司 | 一种非晶氧化物薄膜晶体管及其制作方法、显示面板 |
| CN103337522A (zh) * | 2013-06-17 | 2013-10-02 | 南京中电熊猫液晶显示科技有限公司 | 一种金属氧化物薄膜晶体管阵列基板及其制造方法 |
| CN103403849A (zh) * | 2011-02-28 | 2013-11-20 | 夏普株式会社 | 半导体装置及其制造方法以及显示装置 |
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| JP2014507794A (ja) * | 2010-12-30 | 2014-03-27 | ジュスン エンジニアリング カンパニー リミテッド | 薄膜トランジスタ及びその製造方法 |
| JP6013685B2 (ja) * | 2011-07-22 | 2016-10-25 | 株式会社半導体エネルギー研究所 | 半導体装置 |
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| US20120211755A1 (en) * | 2011-02-17 | 2012-08-23 | Sony Corporation | Thin film transistor, manufacturing method of thin film transistor and display |
| CN103403849A (zh) * | 2011-02-28 | 2013-11-20 | 夏普株式会社 | 半导体装置及其制造方法以及显示装置 |
| CN102655165A (zh) * | 2011-03-28 | 2012-09-05 | 京东方科技集团股份有限公司 | 一种非晶氧化物薄膜晶体管及其制作方法、显示面板 |
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