CN106920753A - Thin film transistor (TFT) and preparation method thereof, array base palte and display - Google Patents

Thin film transistor (TFT) and preparation method thereof, array base palte and display Download PDF

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Publication number
CN106920753A
CN106920753A CN201710277714.0A CN201710277714A CN106920753A CN 106920753 A CN106920753 A CN 106920753A CN 201710277714 A CN201710277714 A CN 201710277714A CN 106920753 A CN106920753 A CN 106920753A
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layer
drain electrode
tft
thin film
film transistor
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CN201710277714.0A
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CN106920753B (en
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温钰
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BOE Technology Group Co Ltd
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BOE Technology Group Co Ltd
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof  ; Multistep manufacturing processes therefor
    • H01L29/66Types of semiconductor device ; Multistep manufacturing processes therefor
    • H01L29/66007Multistep manufacturing processes
    • H01L29/66075Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
    • H01L29/66227Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
    • H01L29/66409Unipolar field-effect transistors
    • H01L29/66477Unipolar field-effect transistors with an insulated gate, i.e. MISFET
    • H01L29/66742Thin film unipolar transistors
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof  ; Multistep manufacturing processes therefor
    • H01L29/40Electrodes ; Multistep manufacturing processes therefor
    • H01L29/43Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
    • H01L29/45Ohmic electrodes
    • H01L29/456Ohmic electrodes on silicon
    • H01L29/458Ohmic electrodes on silicon for thin film silicon, e.g. source or drain electrode
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof  ; Multistep manufacturing processes therefor
    • H01L29/66Types of semiconductor device ; Multistep manufacturing processes therefor
    • H01L29/68Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
    • H01L29/76Unipolar devices, e.g. field effect transistors
    • H01L29/772Field effect transistors
    • H01L29/78Field effect transistors with field effect produced by an insulated gate
    • H01L29/786Thin film transistors, i.e. transistors with a channel being at least partly a thin film
    • H01L29/78606Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device
    • H01L29/78618Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device characterised by the drain or the source properties, e.g. the doping structure, the composition, the sectional shape or the contact structure

Abstract

A kind of thin film transistor (TFT) of present invention offer and preparation method thereof, array base palte and display, the preparation method of the thin film transistor (TFT), including:Substrate is provided;Grid layer, gate insulation layer and active layer are formed on the substrate;Deposited metal layer, corona treatment is carried out using fluoro-gas to the metal level on the active layer, and treatment is performed etching to the metal level after treatment, and source layer and the drain electrode layer are formed respectively, and the source layer and the drain electrode layer are respectively single layer structure.Thin film transistor (TFT) that the present invention is provided and preparation method thereof; improve the inoxidizability of source-drain electrode; source layer and drain electrode layer are by traditional three-decker for respectively having layer protective layer up and down; it is simplified, reduces the contact resistance of source-drain electrode and raceway groove, and after source layer and drain electrode layer are by plasma bombardment; surface roughness is improved; the adhesion between source layer and drain electrode layer and photoresist can be strengthened, the stripping of photoresist is prevented, the yield of technique is improved.

Description

Thin film transistor (TFT) and preparation method thereof, array base palte and display
Technical field
The present invention relates to display device technology field, more particularly to a kind of thin film transistor (TFT) and preparation method thereof, array base Plate and display.
Background technology
TFT-LCD (Thin Film Transistor-LCD) is due to possessing low-power consumption, frivolous easy-to-use, high brightness, high-contrast With many merits such as high response speed, developed by leaps and bounds in recent years, occupied in current flat panel display market Leading position.In TFT, source-drain electrode is generally made up of the excellent metal level of electric property.But easily aoxidized due to metal level Characteristic, prepares source-drain electrode typically using three-decker, i.e., in the addition layer protective layer each up and down of metal level, to prevent source-drain electrode Aoxidized in TFT preparation process.Although the above method can preferably avoid the oxidation of metal level, can also increase source and drain Pole and the contact resistance of active area.And the adhesion between source-drain electrode and photoresist can be caused poor, photoresist lift off easily occurs Phenomenon.How to prepare with inoxidizability and good source and drain very thin films are contacted with photoresist is problem demanding prompt solution.
The content of the invention
In view of above mentioned problem of the prior art, it is an object of the invention to provide a kind of thin film transistor (TFT) and its making side Method, array base palte and display, improve the inoxidizability of source-drain electrode, and can avoid the stripping of source-drain electrode and photoresist.
It is that, up to above-mentioned purpose, the present invention uses following technical scheme.
Embodiments of the invention provide a kind of preparation method of thin film transistor (TFT), including:Substrate is provided;On the substrate Form grid layer, gate insulation layer and active layer;The deposited metal layer on the active layer, using fluoro-gas to the metal level Corona treatment is carried out to improve surface roughness, treatment is performed etching to the metal level after treatment, source layer is formed respectively And drain electrode layer.
Wherein, the composition of the fluoro-gas includes SiF4 and N2.
Wherein, the source layer and the drain electrode layer are respectively including any one in copper, aluminium, magnesium, silver or its combination.
It is exhausted that the preparation method of the thin film transistor (TFT) is additionally included in deposition passivation after forming the source layer and drain electrode layer Edge layer, and being patterned to the passivation insulation, then pixel deposition electrode layer.
Embodiments of the invention provide a kind of thin film transistor (TFT), including:Substrate;Grid layer, gate insulation layer and active layer, shape Into on the substrate;Source layer and drain electrode layer, are formed in the active layer, wherein, the source layer and drain electrode layer By the corona treatment of fluoro-gas.
Wherein, the composition of the fluoro-gas includes SiF4 and N2.
Wherein, the source layer and the drain electrode layer are respectively including any one in copper, aluminium, magnesium, silver or its combination.
Described thin film transistor (TFT) also includes being formed in the passivation insulation and pixel on the source layer and drain electrode layer Electrode layer.
Embodiments of the invention also provide a kind of array base palte, including foregoing thin film transistor (TFT).
The present invention also provides a kind of display, including foregoing array base palte.
Thin film transistor (TFT) and preparation method thereof that the present invention is provided, improves the inoxidizability of source-drain electrode, source layer and Drain electrode layer is simplified by traditional three-decker for respectively having layer protective layer up and down, reduces source-drain electrode with raceway groove Contact resistance, and after source layer and drain electrode layer are by plasma bombardment, surface roughness is improved, and can strengthen source Pole layer and the adhesion between drain electrode layer and photoresist, prevent the stripping of photoresist, improve the yield of technique.
Brief description of the drawings
Fig. 1 shows the flow chart of the making thin film transistor (TFT) according to embodiment.
Fig. 2 shows the structural representation of the source-drain electrode metal level before the treatment according to embodiment.
Fig. 3 shows to carry out Source and drain metal level using fluoro-gas the artwork of corona treatment.
Fig. 4 shows the structural representation of the source-drain electrode metal level after the treatment according to embodiment.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched The specific embodiment stated is only used for explaining the present invention, rather than limitation of the invention.It also should be noted that, for the ease of Description, illustrate only part rather than entire infrastructure related to the present invention in accompanying drawing.
Embodiment one
The present embodiment provides a kind of preparation method of thin film transistor (TFT).Fig. 1 shows the making film crystal according to embodiment The flow chart of pipe.
The method of the making thin film transistor (TFT) according to the present embodiment comprises the following steps.
In step S101, there is provided substrate, choose a substrate and clean up.
In step s 102, grid layer, grid are produced by techniques such as deposition, exposure, development, etchings on the substrate Insulating barrier and active layer.
Next, in step S103, deposited metal layer 1, the structure for obtaining is as shown in Figure 2.Fig. 2 shows the source before treatment The structural representation of drain metal layer.Here metal level 1 be the follow-up source layer and drain electrode layer to be formed, can include copper, Any one in aluminium, magnesium, silver or its combination, because these metals have excellent electric conductivity, it is possible to for film is brilliant Body pipe provides excellent electrical contact performance, but these metals are easily aoxidized.
To solve this problem, in step S104, corona treatment is carried out to metal level 1 using fluoro-gas, it is fluorine-containing Gas mainly includes SiF4 gases and nitrogen.
Fig. 3 shows to carry out Source and drain metal level using fluoro-gas the artwork of corona treatment.As shown in figure 3, adopting Corona treatment is carried out to metal level 1 with SiF4 gases and nitrogen, in processing procedure, SiF4 gases and nitrogen are by plasma Bodyization can produce fluoro-containing group, and the oxidisability of these fluoro-containing groups is more stronger than oxygen, in the presence of these fluoro-containing groups, gold Category will not react with the oxygen in air, and fluoro-containing group blocks metal with sky equivalent to diaphragm is formd on the metal surface Oxygen in gas reacts, so as to improve the antioxygenic property of metal.
Traditional source layer and drain electrode layer respectively have layer protective layer up and down, are three-decker, in the present embodiment, metal Layer have passed through the corona treatment of fluoro-gas, enhance antioxygenic property, and source layer and drain electrode layer upper and lower part are no longer Need protective layer, the structure of source layer and drain electrode layer can be simplified.
Additionally, as shown in figure 4, after by the bombardment of plasma, the surface roughness of metal level 1 is improved, and so may be used With the adhesion between the photoresist during strengthening metal level and subsequent process, prevent the phenomenon of photoresist lift off from occurring.
Then, source electrode is formed respectively to the treatment such as performing etching by the metal level after above-mentioned treatment in step S105 Layer and drain electrode layer.
Finally, passivation insulation is deposited after the source layer and drain electrode layer is formed, and passivation insulation is carried out Patterning, the main component of passivation insulation is silica, then redeposited tin indium oxide (ITO) film layer, and carries out figure Case, to form pixel electrode layer.
In the present embodiment, metal level i.e. source layer and drain electrode layer are carried out at plasma using fluoro-gas Reason, improves the inoxidizability of source-drain electrode, and source layer and drain electrode layer are by traditional three-layered node for respectively having layer protective layer up and down Structure, is simplified, and reduces the contact resistance of source-drain electrode and raceway groove, and source layer and drain electrode layer by plasma bombardment Afterwards, surface roughness is improved, and can strengthen the adhesion between source layer and drain electrode layer and photoresist, prevents photoresist Stripping, improve technique yield.
Embodiment two
The present embodiment provides a kind of thin film transistor (TFT).
Thin film transistor (TFT) according to the present embodiment includes:Substrate;Grid layer, gate insulation layer and active layer, are formed in described On substrate;Source layer and drain electrode layer, are formed in the active layer, wherein, the source layer and drain electrode layer are by having The metal level deposited in active layer performs etching treatment and is formed.The metal level i.e. the source layer and drain electrode layer are wrapped respectively Include any one or its combination in copper, aluminium, magnesium, silver.
Before treatment is performed etching to metal level, anti-oxidant treatment is first carried out to metal level, that is, using containing fluorine gas Body carries out corona treatment to metal level.The composition of the fluoro-gas include SiF4 gases and nitrogen, by treatment after, Anti-oxidation protection film is formed in layer on surface of metal, the inoxidizability of metal level i.e. source layer and drain electrode layer is improve, it is former Reason has been described above in embodiment one, and description is not repeated herein.
After the source layer and drain electrode layer are by the corona treatment of fluoro-gas, antioxygenic property is improved, Do not need traditional structure in, in the protective layer that the upper and lower part of source layer and drain electrode layer is respectively provided with.So, source layer and leakage The structure of pole layer can be simplified.The structure simplification of source layer and drain electrode layer can reduce source layer and drain electrode layer with raceway groove Contact resistance.And source layer and drain electrode layer, after by plasma bombardment, the roughness on surface is improved, follow-up Technical process in, the adhesion between source layer and drain electrode layer and photoresist is enhanced, and improves the yield of technique.
Thin film transistor (TFT) according to the present embodiment also includes being formed in the passivation insulation on the source layer and drain electrode layer Layer and pixel electrode layer, the main component of the passivation insulation is silica, and the main component of the pixel electrode layer is Tin indium oxide (ITO).
Embodiments of the invention also provide a kind of array base palte, including foregoing thin film transistor (TFT), and a kind of liquid Crystal display, including described array base palte.
Note, above are only the principle of presently preferred embodiments of the present invention and institute's application technology.Those skilled in the art should Understand, the invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious Change, readjust and substitute without departing from protection scope of the present invention.Therefore, although by above example to the present invention It is described in further detail, but the present invention is not limited only to above example, is not departing from the situation of present inventive concept Under, more other Equivalent embodiments can also be included, and the scope of the present invention is determined by appended claim.

Claims (10)

1. a kind of preparation method of thin film transistor (TFT), including:
Substrate is provided;
Grid layer, gate insulation layer and active layer are formed on the substrate;
Deposited metal layer, uses fluoro-gas to carry out corona treatment to improve table to the metal level on the active layer The roughness in face, to treatment after the metal level perform etching treatment, respectively formed source layer and drain electrode layer.
2. the preparation method of thin film transistor (TFT) as claimed in claim 1, wherein, the composition of the fluoro-gas include SiF4 and N2。
3. the preparation method of thin film transistor (TFT) as claimed in claim 1, wherein, the source layer and the drain electrode layer are wrapped respectively Include any one or its combination in copper, aluminium, magnesium, silver.
4. the preparation method of thin film transistor (TFT) as claimed in claim 1, be additionally included in be formed the source layer and drain electrode layer it After deposit passivation insulation, and the passivation insulation is patterned, then pixel deposition electrode layer.
5. a kind of thin film transistor (TFT), including:
Substrate;
Grid layer, gate insulation layer and active layer, are formed on the substrate;
Source layer and drain electrode layer, are formed in the active layer, wherein, the source layer and drain electrode layer are by fluoro-gas Corona treatment.
6. thin film transistor (TFT) as claimed in claim 5, wherein, the composition of the fluoro-gas includes SiF4 and N2.
7. thin film transistor (TFT) as claimed in claim 5, wherein, the source layer and the drain electrode layer include respectively copper, aluminium, Any one in magnesium, silver or its combination.
8. thin film transistor (TFT) as claimed in claim 5, it is also exhausted including being formed in passivation on the source layer and drain electrode layer Edge layer and pixel electrode layer.
9. a kind of array base palte, including the thin film transistor (TFT) as described in any in claim 5-8.
10. a kind of display, including array base palte as claimed in claim 9.
CN201710277714.0A 2017-04-25 2017-04-25 Thin film transistor, manufacturing method thereof, array substrate and display Active CN106920753B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109727911A (en) * 2018-12-10 2019-05-07 昆山龙腾光电有限公司 Method for manufacturing thin film transistor array substrate
CN110335849A (en) * 2019-06-25 2019-10-15 深圳市华星光电半导体显示技术有限公司 Display device, array substrate and preparation method thereof
CN112002754A (en) * 2020-08-11 2020-11-27 深圳市华星光电半导体显示技术有限公司 Array substrate, preparation method thereof and display panel

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1954413A (en) * 2004-05-20 2007-04-25 Psk有限公司 Method for cleaning substrate surface
CN203423187U (en) * 2013-04-10 2014-02-05 合肥京东方光电科技有限公司 Thin film transistor, array substrate, and display device
CN106257618A (en) * 2015-06-19 2016-12-28 东京毅力科创株式会社 Use the film build method of plasma

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1954413A (en) * 2004-05-20 2007-04-25 Psk有限公司 Method for cleaning substrate surface
CN203423187U (en) * 2013-04-10 2014-02-05 合肥京东方光电科技有限公司 Thin film transistor, array substrate, and display device
CN106257618A (en) * 2015-06-19 2016-12-28 东京毅力科创株式会社 Use the film build method of plasma

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109727911A (en) * 2018-12-10 2019-05-07 昆山龙腾光电有限公司 Method for manufacturing thin film transistor array substrate
CN110335849A (en) * 2019-06-25 2019-10-15 深圳市华星光电半导体显示技术有限公司 Display device, array substrate and preparation method thereof
CN110335849B (en) * 2019-06-25 2021-11-02 深圳市华星光电半导体显示技术有限公司 Display device, array substrate and manufacturing method thereof
CN112002754A (en) * 2020-08-11 2020-11-27 深圳市华星光电半导体显示技术有限公司 Array substrate, preparation method thereof and display panel

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