WO2017002986A1 - 산화물 반도체 박막 트랜지스터 및 그 제조 방법 - Google Patents
산화물 반도체 박막 트랜지스터 및 그 제조 방법 Download PDFInfo
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- WO2017002986A1 WO2017002986A1 PCT/KR2015/006651 KR2015006651W WO2017002986A1 WO 2017002986 A1 WO2017002986 A1 WO 2017002986A1 KR 2015006651 W KR2015006651 W KR 2015006651W WO 2017002986 A1 WO2017002986 A1 WO 2017002986A1
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- Prior art keywords
- oxide semiconductor
- oxide
- thin film
- film transistor
- semiconductor thin
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 106
- 239000010409 thin film Substances 0.000 title claims abstract description 49
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 239000000758 substrate Substances 0.000 claims abstract description 51
- 239000010408 film Substances 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 28
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000011737 fluorine Substances 0.000 claims abstract description 19
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 19
- 238000000151 deposition Methods 0.000 claims abstract description 13
- 238000000059 patterning Methods 0.000 claims abstract description 12
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 30
- 239000010410 layer Substances 0.000 claims description 22
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- 238000009832 plasma treatment Methods 0.000 claims description 16
- 239000011241 protective layer Substances 0.000 claims description 15
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 12
- 229910052733 gallium Inorganic materials 0.000 claims description 12
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 claims description 12
- 239000011787 zinc oxide Substances 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 239000011521 glass Substances 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 7
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- -1 aluminum zinc tin oxide Chemical compound 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 229910052738 indium Inorganic materials 0.000 claims description 6
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 6
- HRHKULZDDYWVBE-UHFFFAOYSA-N indium;oxozinc;tin Chemical compound [In].[Sn].[Zn]=O HRHKULZDDYWVBE-UHFFFAOYSA-N 0.000 claims description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims description 6
- 239000011733 molybdenum Substances 0.000 claims description 6
- KYKLWYKWCAYAJY-UHFFFAOYSA-N oxotin;zinc Chemical compound [Zn].[Sn]=O KYKLWYKWCAYAJY-UHFFFAOYSA-N 0.000 claims description 6
- 239000002861 polymer material Substances 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- YSRUGFMGLKANGO-UHFFFAOYSA-N zinc hafnium(4+) indium(3+) oxygen(2-) Chemical compound [O-2].[Zn+2].[In+3].[Hf+4] YSRUGFMGLKANGO-UHFFFAOYSA-N 0.000 claims description 6
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 claims description 6
- 238000012545 processing Methods 0.000 abstract description 2
- 230000007704 transition Effects 0.000 description 4
- 238000005011 time of flight secondary ion mass spectroscopy Methods 0.000 description 3
- 238000005530 etching Methods 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229920001621 AMOLED Polymers 0.000 description 1
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/417—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions carrying the current to be rectified, amplified or switched
- H01L29/41725—Source or drain electrodes for field effect devices
- H01L29/41733—Source or drain electrodes for field effect devices for thin film transistors with insulated gate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66969—Multistep manufacturing processes of devices having semiconductor bodies not comprising group 14 or group 13/15 materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02296—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer
- H01L21/02299—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer pre-treatment
- H01L21/02312—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer pre-treatment treatment by exposure to a gas or vapour
- H01L21/02315—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer pre-treatment treatment by exposure to a gas or vapour treatment by exposure to a plasma
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types 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
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
- H01L29/78606—Thin 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types 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
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
- H01L29/78606—Thin 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
- H01L29/78618—Thin 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types 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
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
- H01L29/7869—Thin film transistors, i.e. transistors with a channel being at least partly a thin film having a semiconductor body comprising an oxide semiconductor material, e.g. zinc oxide, copper aluminium oxide, cadmium stannate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types 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
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
- H01L29/7869—Thin film transistors, i.e. transistors with a channel being at least partly a thin film having a semiconductor body comprising an oxide semiconductor material, e.g. zinc oxide, copper aluminium oxide, cadmium stannate
- H01L29/78693—Thin film transistors, i.e. transistors with a channel being at least partly a thin film having a semiconductor body comprising an oxide semiconductor material, e.g. zinc oxide, copper aluminium oxide, cadmium stannate the semiconducting oxide being amorphous
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep 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
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66742—Thin film unipolar transistors
Definitions
- Embodiments of the present invention relate to an oxide semiconductor thin film transistor and a method of manufacturing the same.
- a thin film transistor is used as a switching element for controlling the operation of each pixel and a driving element of each pixel in a display device such as a liquid crystal display device (LCD) or an electroluminescence display device (ELD). .
- LCD liquid crystal display device
- ELD electroluminescence display device
- Oxide semiconductor thin film transistors are applied to flat panel displays such as TFT-LCD and AMOLED, various sensing sensors and driving circuits, and logic circuits based on the advantages of high field mobility, low threshold voltage near 0V, and low leakage current.
- the oxide semiconductor thin film transistor has a problem of reliability despite the above advantages, more specifically, damage to the oxide semiconductor during etching for forming the source electrode and the drain electrode on the upper surface of the oxide semiconductor.
- damage to the oxide semiconductor during etching for forming the source electrode and the drain electrode on the upper surface of the oxide semiconductor There is a growing need for ways to compensate to improve stability and reliability, and to increase the threshold voltage in transition properties without process changes or additional processes.
- the present invention has been made to solve the above-described problem, and a plasma treatment is performed on an upper surface of an oxide semiconductor exposed between a source electrode and a drain electrode, thereby damaging the oxide semiconductor during patterning of the source electrode and the drain electrode. ), And the surface of the oxide semiconductor can be stabilized through plasma treatment to compensate for instability, thereby improving reliability.
- the present invention is to adjust the plasma processing time to increase the threshold voltage in the transition characteristics without changing the process or additional process, to enable the manufacture of an active driving display device and an active driving sensor on a variety of substrates .
- a method of manufacturing an oxide semiconductor thin film transistor includes a first step of forming a gate electrode by depositing and patterning a gate layer on a substrate; Depositing a gate insulating film on the gate electrode; Depositing and patterning the oxide semiconductor on the gate insulating film; And a fourth step of performing treatment using a plasma containing fluorine (F) on the oxide semiconductor.
- the third step further comprises the step of forming a source electrode and a drain electrode on the patterned oxide semiconductor, wherein the fourth step of the source electrode and the drain electrode Treatment may be performed using a plasma containing fluorine (F) on the oxide semiconductor exposed between.
- F fluorine
- a fifth step of forming a source electrode and a drain electrode on the oxide semiconductor processed using the plasma may further include.
- the method may further include depositing a silicon oxide protective film on the substrate before the first step.
- the first step may form a gate electrode by depositing and patterning a gate layer on the oxide protective layer.
- the oxide semiconductor is indium gallium zinc oxide (Amorphous-InGaZnO4), zinc oxide (ZnO), indium zinc oxide (IZO), indium tin oxide (ITO), zinc tin oxide (ZTO) And gallium zinc oxide (GZO), hafnium indium zinc oxide (HIZO), zinc indium tin oxide (ZITO), and aluminum zinc tin oxide (AZTO).
- Amorphous-InGaZnO4 zinc oxide
- ZnO zinc oxide
- IZO indium zinc oxide
- ITO indium tin oxide
- ZTO zinc tin oxide
- GZO gallium zinc oxide
- ZITO zinc indium tin oxide
- AZTO aluminum zinc tin oxide
- the plasma treatment may further include a fifth step of forming a protective layer on the source electrode, the drain electrode and the oxide semiconductor.
- the gate insulating film or the protective layer may include at least one of a silicon oxide film and a silicon nitride film.
- ZnF bonding may be formed in the oxide semiconductor by a treatment using plasma containing fluorine (F).
- NF or InZn bonding may be formed in the oxide thin film in the oxide semiconductor by a treatment using a plasma containing nitrogen (N) and fluorine (F). have.
- the substrate is any one of a glass substrate, a plastic substrate, a silicon substrate and a substrate on which a polymer material is formed on the glass substrate, and the source electrode and the drain electrode are molybdenum (Mo), copper It may include at least one of (Cu), aluminum (AL) and indium tin oxide (ITO).
- Mo molybdenum
- Cu copper
- AL aluminum
- ITO indium tin oxide
- An oxide semiconductor thin film transistor is a substrate; A gate electrode formed on the substrate; A gate insulating film formed on the gate electrode; An oxide semiconductor formed on the gate insulating film; And a source electrode and a drain electrode formed on the oxide semiconductor, wherein the oxide semiconductor is formed by ZnF bonding in the oxide semiconductor by treatment using a plasma containing fluorine (F), or nitrogen (N) and NF or InZn bonding is formed in the oxide semiconductor by a treatment using a plasma containing fluorine (F).
- F plasma containing fluorine
- N nitrogen
- NF or InZn bonding is formed in the oxide semiconductor by a treatment using a plasma containing fluorine (F).
- an oxide protective film formed on the substrate may further include.
- the oxide semiconductor is indium gallium zinc oxide (Amorphous-InGaZnO4), zinc oxide (ZnO), indium zinc oxide (IZO), indium tin oxide (ITO), zinc tin oxide (ZTO) And gallium zinc oxide (GZO), hafnium indium zinc oxide (HIZO), zinc indium tin oxide (ZITO), and aluminum zinc tin oxide (AZTO).
- Amorphous-InGaZnO4 zinc oxide
- ZnO zinc oxide
- IZO indium zinc oxide
- ITO indium tin oxide
- ZTO zinc tin oxide
- GZO gallium zinc oxide
- ZITO zinc indium tin oxide
- AZTO aluminum zinc tin oxide
- the plasma treatment may further include a protective layer formed on the source electrode, the drain electrode and the oxide semiconductor.
- the gate insulating film or the protective layer may include at least one of a silicon oxide film and a silicon nitride film.
- the substrate is any one of a glass substrate, a plastic substrate, a silicon substrate and a substrate on which a polymer material is formed on the glass substrate, and the source electrode and the drain electrode are molybdenum (Mo), copper It may include at least one of (Cu), aluminum (AL) and indium tin oxide (ITO).
- Mo molybdenum
- Cu copper
- AL aluminum
- ITO indium tin oxide
- plasma treatment may be performed on the upper surface of the oxide semiconductor exposed between the source electrode and the drain electrode to compensate for the damage to the oxide semiconductor during patterning of the source electrode and the drain electrode.
- Plasma treatment enables stabilization of the oxide semiconductor surface to compensate for instability and to improve reliability.
- 1 to 4 are diagrams illustrating an oxide semiconductor thin film transistor and a method of manufacturing the same according to an embodiment of the present invention.
- 5 to 12 are views for explaining the improved characteristics of the method for manufacturing an oxide semiconductor thin film transistor according to an embodiment of the present invention.
- FIG. 1 to 4 are views for explaining a method of manufacturing an oxide semiconductor thin film transistor according to an embodiment of the present invention.
- a gate electrode 120 is formed on a substrate 110.
- a gate layer is deposited on the substrate 110 and then patterned to form the gate electrode 120.
- the substrate 110 may be formed of any one of a glass substrate, a plastic substrate, a silicon substrate, and a substrate on which a polymer material is formed.
- the gate electrode 120 may be formed on the oxide protective film.
- the gate insulating layer 130 is deposited on the gate electrode configured as described above, as illustrated in FIG. 2.
- the gate insulating layer 130 may include at least one of a silicon oxide film and a silicon nitride film.
- oxide semiconductor 140 is deposited and patterned on the gate insulating layer 130 formed as described above.
- the oxide semiconductor 140 is indium gallium zinc oxide (Amorphous-InGaZnO4), zinc oxide (ZnO), indium zinc oxide (IZO), indium tin oxide (ITO), zinc tin oxide ( ZTO), gallium zinc oxide (GZO), hafnium indium zinc oxide (HIZO), zinc indium tin oxide (ZITO) and aluminum zinc tin oxide (AZTO) can be composed of amorphous or polycrystalline.
- the plasma is processed using a plasma including fluorine (F) on the oxide semiconductor 140.
- an oxide semiconductor 140 exposed directly between the source electrode 150 and the drain electrode 160 may be directly plasma-processed on the oxide semiconductor or after the source electrode 150 and the drain electrode 160 are formed. Plasma treatment can be performed on the upper surface.
- a plasma treatment is performed to protect the oxide semiconductor 140 when the source electrode 150 and the drain electrode 160 are formed later, or the source electrode 150 and the drain electrode. Damage to the oxide semiconductor 140 may be compensated for during the patterning of the 160.
- ZnF bonding is formed in the oxide semiconductor by treatment using plasma containing fluorine (F) on the oxide semiconductor 140, or nitrogen (N) and fluorine (F) are formed.
- NF or InZn bonding may be formed in the oxide thin film in the oxide semiconductor by a treatment using an included plasma.
- Plasma treatment on the oxide semiconductor 140 allows stabilization of the surface of the oxide semiconductor 140 to compensate for instability and to improve reliability.
- the source electrode 150 and the drain electrode 160 may include at least one of molybdenum (Mo), copper (Cu), aluminum (AL), and indium tin oxide (ITO).
- Mo molybdenum
- Cu copper
- AL aluminum
- ITO indium tin oxide
- a protective layer 170 may be formed on the source electrode 150, the drain electrode 160, and the oxide semiconductor 140 that have been subjected to the plasma treatment.
- the gate insulating layer 130 or the protective layer 170 may include at least one of a silicon oxide layer and a silicon nitride layer.
- contact holes 180 may be formed in the passivation layer 170 to partially expose the top surfaces of the source electrode 150 and the drain electrode 160, respectively.
- the oxide semiconductor thin film transistor may include a substrate 110, a gate electrode 120, a gate insulating layer 130, an oxide semiconductor 140, a source electrode 150, The drain electrode 160 and the protective layer 170 are included.
- the gate electrode 120 is formed on the substrate 110, the gate insulating layer 130 is formed on the gate electrode 120, and the oxide semiconductor 140 is formed on the gate electrode 120.
- the source electrode 150 and the drain electrode 160 may be formed on the semiconductor 140, and the passivation layer 170 may be formed on the source electrode 150, the drain electrode 160, and the oxide semiconductor 140. have.
- the substrate 110 may be formed of any one of a glass substrate, a plastic substrate, a silicon substrate, and a substrate on which a polymer material is formed, and an oxide protective layer may be further formed on the substrate 110.
- the source electrode 150 and the drain electrode 160 may include at least one of molybdenum (Mo), copper (Cu), aluminum (AL), and indium tin oxide (ITO).
- Mo molybdenum
- Cu copper
- AL aluminum
- ITO indium tin oxide
- the oxide semiconductor 140 is indium gallium zinc oxide (Amorphous-InGaZnO4), zinc oxide (ZnO), indium zinc oxide (IZO), indium tin oxide (ITO), zinc tin oxide (ZTO), gallium zinc oxide (GZO), hafnium indium zinc oxide (HIZO), zinc indium tin oxide (ZITO), and aluminum zinc tin oxide (AZTO).
- Amorphous-InGaZnO4 indium gallium zinc oxide
- ZnO zinc oxide
- IZO indium zinc oxide
- ITO indium tin oxide
- ZTO zinc tin oxide
- GaZO gallium zinc oxide
- ZITO zinc indium tin oxide
- AZTO aluminum zinc tin oxide
- ZnF bonding is formed in the oxide semiconductor 140 by treatment using plasma containing fluorine (F), or nitrogen (N) and fluorine ( NF or InZn bonding may be formed in the oxide semiconductor 140 by a process using a plasma including F).
- the gate insulating layer 130 or the protective layer 170 may include at least one of a silicon oxide layer and a silicon nitride layer, and the source layer 150 and the drain electrode (respectively) may be formed on the protective layer 170.
- the contact hole 180 partially exposing the top surface of the 160 may be formed.
- 5 to 12 are views for explaining the improved characteristics of the method for manufacturing an oxide semiconductor thin film transistor according to an embodiment of the present invention.
- FIG. 5 is a graph illustrating a transfer curve and a field mobility of an oxide semiconductor thin film transistor having a BCE structure according to the prior art.
- FIG. 6 is a graph showing a transfer curve of an oxide semiconductor thin film transistor according to an embodiment of the present invention
- FIG. 7 is a current curve of an oxide semiconductor thin film transistor according to an embodiment of the present invention. A graph representing.
- 5 and 6 show current voltage characteristics of an oxide semiconductor thin film transistor having an active layer when the drain voltage is 0.1V, 1V, 5V, and 10V.
- the sub-threshold simultaneously with the increase of the threshold voltage is compared with that of the transition curve and the field mobility of the oxide semiconductor thin film transistor having the back channel etched (BCE) structure according to the related art of FIG. 5.
- Swing (SS) can also be seen to implement a thin film transistor of reduced performance.
- VCS positive bias stress
- VCS 30V
- FIG. 10 is a graph of the surface of the oxide semiconductor 140 exposed between the source electrode 150 and the drain electrode 160 according to an embodiment of the present invention subjected to plasma treatment by TOF-SIMS. It can be seen that a large number of Florin is found on the surface of the oxide semiconductor 140.
- 11 and 12 illustrate graphs of measuring TOF-SIMS of a surface by performing a plasma treatment on an exposed surface of an oxide semiconductor 140 between electrodes 150 and 160 according to an exemplary embodiment of the present invention. It can be seen that a large number of Nitrogen is found on the surface.
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Abstract
Description
Claims (17)
- 기판 상에 게이트 층을 증착하고 패터닝하여 게이트 전극을 형성하는 제1 단계;상기 게이트 전극 상에 게이트 절연막을 증착하는 제2 단계;상기 게이트 절연막 상에 상기 산화물 반도체를 증착하고 패터닝하는 제3 단계;상기 산화물 반도체 상에 불소(F)가 포함된 플라즈마를 이용해 처리를 하는 제4 단계;를 포함하는 산화물 반도체 박막 트랜지스터의 제조 방법.
- 청구항 1에 있어서,상기 제3 단계는,상기 패터닝된 산화물 반도체 상에 소스 전극과 드레인 전극을 형성하는 단계;를 더 포함하고,상기 제4 단계는,상기 소스 전극과 상기 드레인 전극의 사이로 노출되는 상기 산화물 반도체 상에 불소(F)가 포함된 플라즈마를 이용해 처리를 하는 산화물 반도체 박막 트랜지스터의 제조 방법.
- 청구항 1에 있어서,상기 플라즈마를 이용해 처리한 상기 산화물 반도체 상에 소스 전극과 드레인 전극을 형성하는 제5 단계;를 더 포함하는 산화물 반도체 박막 트랜지스터의 제조 방법.
- 청구항 1에 있어서,상기 제1 단계 이전에,상기 기판 상에 실리콘 산화 보호막을 증착하는 단계;를 더 포함하는 산화물 반도체 박막 트랜지스터의 제조 방법.
- 청구항 4에 있어서,상기 제1 단계는,상기 산화 보호막 상에 게이트 층을 증착하고 패터닝하여 게이트 전극을 형성하는 산화물 반도체 박막 트랜지스터의 제조 방법.
- 청구항 1에 있어서,상기 산화물 반도체는,인듐 갈륨 징크옥사이드(Amorphous-InGaZnO4), 징크 옥사이드(ZnO), 인듐 징크 옥사이드(IZO), 인듐 틴 옥사이드(ITO), 징크 틴 옥사이드(ZTO), 갈륨 징크 옥사이드(GZO), 하프늄 인듐 징크 옥사이드 (HIZO), 징크 인듐 틴 옥사이드 (ZITO) 및 알루미늄 징크 틴 옥사이드 (AZTO) 중 어느 하나를 포함하여 형성된 비정질 혹은 다결정질로 구성되는 산화물 반도체 박막 트랜지스터의 제조 방법.
- 청구항 1에 있어서,상기 플라즈마 처리한 상기 소스 전극, 상기 드레인 전극과 상기 산화물 반도체 상에 보호층을 형성하는 제5 단계;를 더 포함하는 산화물 반도체 박막 트랜지스터의 제조 방법.
- 청구항 7에 있어서,상기 게이트 절연막 또는 상기 보호층은,실리콘 산화막 및 실리콘 질화막 중에서 적어도 어느 하나를 포함하여 구성되는 산화물 반도체 박막 트랜지스터의 제조 방법.
- 청구항 1에 있어서,상기 제4 단계는,상기 불소(F)가 포함된 플라즈마를 이용한 처리에 의하여 상기 산화물 반도체 내에 ZnF 본딩이 형성되는 산화물 반도체 박막 트랜지스터의 제조 방법.
- 청구항 1에 있어서,상기 제4 단계는,상기 질소(N) 및 불소(F)가 포함된 플라즈마를 이용한 처리에 의하여 상기 산화물 반도체 내에 NF 혹은 InZn 본딩이 상기 산화물 박막 내에 형성되는 산화물 반도체 박막 트랜지스터의 제조 방법.
- 청구항 1에 있어서,상기 기판은,유리 기판, 플라스틱 기판, 실리콘 기판 및 유리 기판 상에 폴리머 물질이 형성된 기판 중에서 어느 하나이고,상기 소스 전극 및 상기 드레인 전극은,몰리브덴(Mo), 구리 (Cu), 알루미늄 (AL) 및 인듐 틴 옥사이드(ITO) 중에서 적어도 어느 하나를 포함하는 산화물 반도체 박막 트랜지스터의 제조 방법.
- 기판;상기 기판 상에 형성되는 게이트 전극;상기 게이트 전극 상에 형성되는 게이트 절연막;상기 게이트 절연막 상에 형성되는 산화물 반도체; 및상기 산화물 반도체 상에 형성되는 소스 전극과 드레인 전극;를 포함하고,상기 산화물 반도체는,불소(F)가 포함된 플라즈마를 이용한 처리에 의하여 상기 산화물 반도체 내에 ZnF 본딩이 형성되거나, 질소(N) 및 불소(F)가 포함된 플라즈마를 이용한 처리에 의하여 상기 산화물 반도체 내에 NF 혹은 InZn 본딩이 형성되는 산화물 반도체 박막 트랜지스터.
- 청구항 12에 있어서,상기 기판 상에 형성되는 산화 보호막;을 더 포함하는 산화물 반도체 박막 트랜지스터.
- 청구항 12에 있어서,상기 산화물 반도체는,인듐 갈륨 징크옥사이드(Amorphous-InGaZnO4), 징크 옥사이드(ZnO), 인듐 징크 옥사이드(IZO), 인듐 틴 옥사이드(ITO), 징크 틴 옥사이드(ZTO), 갈륨 징크 옥사이드(GZO), 하프늄 인듐 징크 옥사이드 (HIZO), 징크 인듐 틴 옥사이드 (ZITO) 및 알루미늄 징크 틴 옥사이드 (AZTO) 중 어느 하나를 포함하여 형성된 비정질 혹은 다결정질로 구성되는 산화물 반도체 박막 트랜지스터.
- 청구항 12에 있어서,상기 플라즈마 처리한 상기 소스 전극, 상기 드레인 전극과 상기 산화물 반도체 상에 형성되는 보호층;을 더 포함하는 산화물 반도체 박막 트랜지스터.
- 청구항 15에 있어서,상기 게이트 절연막 또는 상기 보호층은,실리콘 산화막 및 실리콘 질화막 중에서 적어도 어느 하나를 포함하여 구성되는 산화물 반도체 박막 트랜지스터.
- 청구항 12에 있어서,상기 기판은,유리 기판, 플라스틱 기판, 실리콘 기판 및 유리 기판 상에 폴리머 물질이 형성된 기판 중에서 어느 하나이고,상기 소스 전극 및 상기 드레인 전극은,몰리브덴(Mo), 구리 (Cu), 알루미늄 (AL) 및 인듐 틴 옥사이드(ITO) 중에서 적어도 어느 하나를 포함하는 산화물 반도체 박막 트랜지스터.
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PCT/KR2015/006651 WO2017002986A1 (ko) | 2015-06-30 | 2015-06-30 | 산화물 반도체 박막 트랜지스터 및 그 제조 방법 |
KR1020177035824A KR20180010207A (ko) | 2015-06-30 | 2015-06-30 | 산화물 반도체 박막 트랜지스터 및 그 제조 방법 |
US15/579,265 US20180166544A1 (en) | 2015-06-30 | 2015-06-30 | Oxide semiconductor thin-film transistor and manufacturing method thereof |
CN201580080467.4A CN107690696A (zh) | 2015-06-30 | 2015-06-30 | 氧化物半导体薄膜晶体管及其制造方法 |
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KR20120076062A (ko) * | 2010-12-29 | 2012-07-09 | 삼성전자주식회사 | 트랜지스터와 그 제조방법 및 트랜지스터를 포함하는 전자소자 |
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JP6023994B2 (ja) * | 2011-08-15 | 2016-11-09 | Nltテクノロジー株式会社 | 薄膜デバイス及びその製造方法 |
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JP2015026863A (ja) * | 2009-07-03 | 2015-02-05 | 株式会社半導体エネルギー研究所 | 半導体装置の作製方法 |
KR20120003374A (ko) * | 2010-07-02 | 2012-01-10 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | 반도체 장치 및 반도체 장치의 제작 방법 |
KR20120076062A (ko) * | 2010-12-29 | 2012-07-09 | 삼성전자주식회사 | 트랜지스터와 그 제조방법 및 트랜지스터를 포함하는 전자소자 |
KR20130018199A (ko) * | 2011-08-12 | 2013-02-20 | 엔엘티 테크놀로지 가부시키가이샤 | 박막 디바이스 |
KR20150007000A (ko) * | 2013-07-10 | 2015-01-20 | 삼성디스플레이 주식회사 | 박막 트랜지스터 기판 및 박막 트랜지스터 기판의 제조 방법 |
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US20180166544A1 (en) | 2018-06-14 |
KR20180010207A (ko) | 2018-01-30 |
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