WO2013185433A1 - 薄膜晶体管及其制作方法、阵列基板、显示装置 - Google Patents
薄膜晶体管及其制作方法、阵列基板、显示装置 Download PDFInfo
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- WO2013185433A1 WO2013185433A1 PCT/CN2012/084542 CN2012084542W WO2013185433A1 WO 2013185433 A1 WO2013185433 A1 WO 2013185433A1 CN 2012084542 W CN2012084542 W CN 2012084542W WO 2013185433 A1 WO2013185433 A1 WO 2013185433A1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices 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
- H01L27/12—Devices 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
- H01L27/1214—Devices 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
- H01L27/1222—Devices 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 crystalline structure of the active layer
- H01L27/1225—Devices 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 crystalline structure of the active layer with semiconductor materials not belonging to the group IV of the periodic table, e.g. InGaZnO
-
- 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
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/49—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET
- H01L29/4908—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET for thin film semiconductor, e.g. gate of TFT
-
- 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
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/49—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET
- H01L29/51—Insulating materials associated therewith
- H01L29/517—Insulating materials associated therewith the insulating material comprising a metallic compound, e.g. metal oxide, metal silicate
-
- 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
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
Definitions
- Embodiments of the present invention relate to a thin film transistor, a method of fabricating the same, an array substrate, and a display device. Background technique
- TFT Thin Film Transistor
- the oxide transistor technology has the characteristics of high mobility and good uniformity, so the liquid crystal display using the oxide transistor is one of the development directions of the liquid crystal display technology.
- Embodiments of the present invention provide a TFT that can better control electrical properties, a method for fabricating the same, an array substrate, and a display device.
- An aspect of an embodiment of the present invention provides a thin film transistor, including: a substrate; and a gate, a first gate insulating layer, and an active layer sequentially disposed on the substrate; the first gate insulating layer wrapping the gate The active layer encapsulates the first gate insulating layer, and the material of the first gate insulating layer comprises aluminum oxide.
- an array substrate including at least one thin film transistor
- the thin film transistor includes: a substrate; a gate electrode sequentially disposed on the substrate, a first gate insulating layer, an active layer, Etching the barrier layer; the first gate insulating layer encapsulating the gate, the active layer encapsulating the first gate insulating layer, and the material of the first gate insulating layer comprises aluminum oxide.
- the thin film transistor includes: a substrate and a gate electrode sequentially disposed on the substrate, a first gate insulating layer, an active layer, and an etch barrier layer; the first gate insulating layer wraps the gate electrode The active layer encapsulates the first gate insulating layer, and the material of the first gate insulating layer comprises aluminum oxide.
- a further aspect of the present invention provides a method for fabricating a thin film transistor, comprising: forming a gate on a substrate by a patterning process;
- first gate insulating layer encasing the gate electrode, wherein a material of the first gate insulating layer comprises aluminum oxide;
- An active layer is formed.
- a TFT and a method for fabricating the same, an array substrate, and a display device are provided in an embodiment of the present invention, such that an active layer wraps a gate insulating layer and a gate, and a gate insulating layer containing aluminum oxide is formed. Since the aluminum oxide has good compactness, hydrogen and moisture are effectively prevented from diffusing into the gate insulating layer and the gate, thereby making the electrical properties of the TFT more stable.
- the gate insulating layer by in-situ reaction of the gate, the thickness of the gate insulating layer can be better controlled, and the threshold voltage of the TFT can be better adjusted, thereby reducing the loss of electric energy during charging.
- FIG. 1 is a schematic diagram of a first structure of a TFT according to an embodiment of the present invention
- FIG. 2 is a schematic diagram of a second structure of a TFT according to an embodiment of the present invention.
- FIG. 3 is a schematic diagram of a third structure of a TFT according to an embodiment of the present invention.
- FIG. 4 is a schematic structural diagram of an array substrate according to Embodiment 1 of the present invention.
- FIG. 5 is a schematic structural view of forming an via hole in an array substrate according to Embodiment 1 of the present invention
- FIG. 6 is a schematic structural view of the array substrate according to Embodiment 2 of the present invention
- FIG. 7 is a schematic structural diagram of an array substrate according to Embodiment 3 of the present invention. detailed description
- a TFT as shown in FIG. 1, includes: a substrate 1 and a gate 2, a first gate insulating layer 3, an active layer 4, and a source/drain electrode layer 6, which are sequentially disposed on the substrate 1, the first gate
- the gate insulating layer 3 encloses the gate electrode 2, and the active layer 4 wraps the first gate insulating layer 3.
- the material of the first gate insulating layer 3 includes aluminum oxide.
- the source/drain electrode layer 6 covers the active layer 4 extending on the substrate 1 and is in sufficient contact with the active layer 4.
- the gate electrode 2 may be one or more materials selected from the group consisting of molybdenum, molybdenum-niobium alloy, aluminum, aluminum-niobium alloy, titanium, and copper, and may be formed as a single-layer or multi-layer composite laminate.
- the gate 2 may be a single layer or a multilayer composite film composed of molybdenum, aluminum or a molybdenum-containing aluminum alloy.
- the thickness of the gate electrode 2 may be 1000 to 3000 nm.
- an etching stopper layer, a passivation layer, or the like may be formed on the source/drain electrode layer.
- the material of the source/drain electrode layer 6 may be one or a combination of molybdenum, tungsten-molybdenum alloy, aluminum-bismuth alloy or copper.
- the material of the active layer 4 may be indium gallium oxide, indium gallium oxide, germanium indium oxide, indium tin oxide, germanium indium oxide or amorphous silicon.
- the material of the etch barrier layer may be one or a combination of silicon dioxide, hafnium oxide, aluminum oxide, aluminum nitride, silicon oxide.
- the material of the passivation layer may be one or a combination of silicon oxide, silicon nitride, silicon oxynitride, polyimide, polydecyl acrylate or povidone.
- the formation of the first gate insulating layer 3 including the aluminum oxide material can be realized by plasma bombardment of the gate electrode.
- the reaction that takes place during the preparation: x0 2 - + Al A10x + 2xe (AlOx is amorphous alumina, x is the molar ratio of oxygen ions to aluminum ions in the alumina), and amorphous is generated in situ by the reaction. Alumina.
- an active layer wraps a gate insulating layer and a gate, and And forming a gate insulating layer containing aluminum oxide. Because of the better compactness of alumina, hydrogen and water vapor are effectively prevented from diffusing into the gate insulating layer and the gate electrode, thereby making the electrical properties of the TFT more stable.
- the thickness of the gate insulating layer can be better controlled, and the threshold voltage of the TFT is better adjusted, thereby reducing the loss of electric energy during charging. For example, by controlling the reaction rate and the reaction time, the thickness of the gate insulating layer can be more precisely controlled.
- a second gate insulating layer 10 may be disposed between the first gate insulating layer 3 and the active layer 4;
- the gate insulating layer 10 wraps the first gate insulating layer 3, and the material of the second gate insulating layer 10 includes aluminum oxynitride.
- the process of in situ reaction to form aluminum oxynitride is as follows: bombarding amorphous alumina with plasma nitrogen
- the gate electrode 2 is layered into an inner gate layer 2a and an outer gate layer 2b; the inner gate layer 2a is made of copper, The material of the outer gate layer 2b includes aluminum.
- the embodiment of the present invention further provides an array substrate, as shown in FIG. 4, including at least one TFT.
- the TFT includes: a substrate 1 and a gate 2 sequentially disposed on the substrate 1. a first gate insulating layer 3, an active layer 4, an etch stop layer 5, a source/drain electrode layer 6, a passivation layer 7, and a pixel electrode 8; the first gate insulating layer 3 wraps the gate 2, The active layer 4 wraps the first gate insulating layer 3, and the material of the first gate insulating layer 3 includes aluminum oxide.
- the first gate insulating layer 3 covers the upper surface and the side surface of the gate electrode 2; the active layer 4 covers the upper surface and the side surface of the first gate insulating layer 3.
- a gate electrode 2 including aluminum is disposed above the substrate 1; a first gate insulating layer 3 including an aluminum oxide, an active layer 4, and an etch barrier layer 5 are sequentially disposed on the gate electrode 2 from bottom to top;
- a first gate insulating layer 3 comprising aluminum oxide envelops the gate electrode 2 and is formed by in-situ reaction of the gate electrode 2 containing aluminum;
- the active layer 4 extends on the substrate 1 on both sides of the first gate insulating layer 3 including aluminum oxide; the source/drain electrode layer 6 covers the active layer 4 extending on the substrate 1 and sufficiently contacts the active layer 4, And contacting the etch barrier layer 5;
- a via hole 9 is formed which is exposed on the drain of the source/drain electrode layer 6; a pixel electrode 8 is provided in the via hole 9 and on the surface of the passivation layer 7, as shown in FIG. The pixel electrode 8 is brought into contact with the drain of the source/drain electrode layer 6 side.
- the material of the source/drain electrode layer 6 may be one or a combination of molybdenum, tungsten-molybdenum alloy, aluminum-bismuth alloy or copper.
- the material of the active layer 4 may be indium gallium oxide, indium gallium oxide, germanium indium oxide, indium tin oxide, germanium indium oxide or amorphous silicon.
- the material of the etch barrier layer 5 may be one or a combination of silicon dioxide, hafnium oxide, aluminum oxide, aluminum nitride, silicon oxide.
- the material of the passivation layer 7 may be one or a combination of silicon oxide, silicon nitride, silicon oxynitride, polyimide, polydecyl acrylate or povidone.
- the material of the pixel electrode 8 may be indium tin oxide, indium oxide, polyethylene dioxythiophene or graphene.
- the material of the substrate 1 may be glass or plastic.
- the thickness of the gate 2 is 1000 to 3000 nm. Since the thickness of the gate electrode 2 directly affects the performance of the TFT, for example, by in-situ reaction of the gate electrode 2 containing aluminum to form the first gate insulating layer 3, the first gate insulating layer 3 is formed.
- the gate material is formed as a gate so that the aluminum in the gate 2 can be reacted to alumina by in-situ reaction to better adjust the thickness of the gate 2.
- the thickness of the first gate insulating layer and the thickness of the finally formed gate may pass through the initial The thickness of the gate and the extent and extent of the reaction are controlled.
- both the thickness of the first gate insulating layer and the thickness of the gate can be effectively controlled.
- the in-situ reaction can be achieved by a magnetron sputtering device or a chemical vapor deposition device.
- Embodiments of the present invention provide an array substrate in which an active layer wraps a gate insulating layer and a gate. And forming a gate insulating layer containing aluminum oxide, so that the gate insulating layer has better etching selectivity with respect to the etch barrier layer, thereby avoiding the overetching of the gate electrode and the active layer during the etching process. phenomenon.
- the better compactness of alumina hydrogen and moisture are effectively prevented from diffusing into the gate insulating layer and the gate electrode, thereby making the electrical properties of the TFT more stable.
- the thickness of the gate insulating layer can be better controlled, the threshold voltage of the TFT can be better adjusted, and the loss of electric energy during charging can be reduced.
- the first gate insulating layer 3 formed of aluminum oxide when the first gate insulating layer 3 formed of aluminum oxide is charged, more interface charges are likely to occur on the first gate insulating layer 3, thereby easily causing the first
- the breakdown of the gate insulating layer 3 causes the gate 2 and the active layer 4 on both sides to be turned on, damaging the array substrate of the TFT.
- a second gate insulating layer 10 may be disposed between the first gate insulating layer 3 and the active layer 4; the second gate insulating layer 10
- the first gate insulating layer 3 is wrapped, and the material of the second gate insulating layer 10 includes aluminum oxynitride.
- the second gate insulating layer 10 covers the upper surface and the side surface of the first gate insulating layer 3.
- the first gate insulating layer 3 including aluminum oxide is formed on the surface of the gate electrode 2 containing aluminum in the preparation process of the array substrate, the first gate insulating layer 3 is performed in the presence of plasma of nitrogen and oxygen. The in-situ reaction is performed to thereby form the second gate insulating layer 10.
- the introduction of nitrogen can inhibit the penetration of impurity ions and passivate the interface state, thereby improving the reliability of the TFT and better controlling the electrical properties of the TFT.
- first gate insulating layer 3 and the second gate insulating layer 10 may be annealed to remove the stress of the first gate insulating layer 3 and the second gate insulating layer 10, so that the first gate insulating layer 3 and the second gate insulating layer 10 have better physical properties.
- the gate 2 is layered into an inner gate layer 2a and an outer gate layer. 2b; the material of the inner gate layer 2a comprises copper, and the material of the outer gate layer 2b comprises aluminum.
- an inner gate layer 2a including copper is first formed on the substrate 1 by deposition and etching; and an outer gate layer 2b including aluminum is formed by deposition and etching, wherein the outer gate layer 2b wraps the inner gate Polar layer 2a.
- the outer gate layer 2b covers the upper surface and the side surface of the inner gate layer 2a.
- the outer gate layer 2a is directly reacted in situ to form a first gate insulating layer 3 including aluminum oxide.
- the conductivity of copper is superior to that of aluminum
- the conductivity of the gate 2 of the layered structure is significantly better than that of the gate 2 of the single layer of aluminum, thereby also improving the conductivity of the TFT, and charging the pixel electrode 8 more quickly.
- the inner gate layer 2a can also be made of other conductive materials having higher conductivity than aluminum (A1).
- a gate line connected to the gate electrode 2 is also deposited on the periphery of the TFT array substrate (in the figure) Not shown) to transmit a signal to the gate 2 through the gate line.
- the material of the gate line is the same as the material of the gate electrode 2, and the material of the insulating layer covered on the gate line is the same as that of the first gate insulating layer 3 and the second gate insulating layer 10. Therefore, hydrogen and water vapor are also prevented from diffusing to the gate lines, thereby ensuring the conductivity of the gate lines.
- the embodiment of the invention further provides a display device comprising the above array substrate.
- the present invention also provides a method for preparing the TFT of the above Embodiment 1, which includes:
- the substrate 1 to be used is cleaned to keep the surface of the substrate clean.
- the material of the substrate 1 may be glass or plastic; wherein the glass substrate is used to prepare a rigid array substrate, and the plastic substrate Can be used to prepare flexible array substrates.
- the substrate 1 is moved to a magnetron sputtering apparatus, and a deposited layer containing aluminum is deposited on the surface of the substrate 1.
- a photoresist is applied, and the desired pattern is patterned on the photoresist by exposure and development.
- An etching gas is introduced, the deposited layer is etched, and the residual photoresist is washed away to form the gate electrode 2 on the substrate 1.
- the deposition time can be adjusted according to actual needs, thereby obtaining the gate 2 of a corresponding thickness. For example, a gate electrode 2 of 220 nm can be formed.
- first gate insulating layer encasing the gate, wherein a material of the first gate insulating layer comprises aluminum oxide.
- the oxygen plasma is obtained by a magnetron sputtering device, and the oxygen plasma is introduced into the magnetron sputtering apparatus to form a desired processing condition, for example, the power density may be 0.2-5 watts per square centimeter, and the oxygen partial pressure is 0.2-1.2 Pa.
- a magnetron sputtering apparatus an oxygen plasma is accelerated by an applied magnetic field, and an aluminum gate 2 is bombarded on the substrate 1; the accelerated oxygen plasma enters the aluminum gate 2, and further with aluminum.
- the thickness of the first gate insulating layer 3 is thickened as the reaction time increases, so it is necessary to set a reasonable reaction time so that the finally formed TFT has better conductivity.
- the thickness of the first gate insulating layer 3 may be set to be between 5 and 50 nanometers.
- the first gate insulating layer 3 may be formed by directly depositing aluminum oxide on the gate electrode 2, and the manner in which the first gate insulating layer 3 is formed is not limited herein.
- the active layer 4 is formed on the substrate 1 by a patterning process in a magnetron sputtering apparatus.
- an etch barrier layer 5, a source/drain electrode layer 6, a passivation layer 7, and a pixel electrode 8 may be further formed on the substrate 1 on the basis of forming the active layer 4.
- the above structure can be formed by magnetron sputtering or chemical vapor deposition.
- a via hole 9 exposing the drain on the side of the source/drain electrode layer 6 is formed; in the via hole 9 A pixel electrode 8 is deposited on the passivation layer 7, and as shown in FIG. 5, the pixel electrode 8 is brought into contact with the drain of the source/drain electrode layer 6.
- the material of the source/drain electrode layer 6 may be one or a combination of molybdenum, tungsten-molybdenum alloy, aluminum-bismuth alloy or copper, wherein the source-drain electrode layer 6 may be set as a single according to actual needs.
- the layer or the laminated structure is not limited herein.
- the material of the active layer 4 may be indium gallium oxide, germanium indium oxide, indium tin oxide, germanium indium oxide or amorphous silicon.
- the material of the etch barrier layer 5 may be one or a combination of silicon dioxide, hafnium oxide, aluminum oxide, aluminum nitride, silicon oxide, wherein the etching barrier layer 5 may be set as a single layer according to actual needs. Or a laminated structure, which is not limited herein.
- the material of the passivation layer 7 may be one or a combination of silicon oxide, silicon nitride, silicon oxynitride, polyimide, polydecyl methacrylate or povidone.
- the material of the pixel electrode 8 may be a transparent conductive material such as indium tin oxide, indium oxide, polyethylene dioxythiophene or graphene.
- the material of the substrate 1 is glass or plastic.
- the thickness of the gate electrode 2 is 1000 to 3000 nm.
- the thickness of the gate 2 can be achieved by controlling the time of preparation.
- the gate 2 contains aluminum
- the aluminum in the gate is converted into aluminum oxide by an in-situ reaction, so that the gate 2 can be adjusted again after adjusting the deposition of the gate material and etching the gate 2. Thickness to achieve optimum conductivity.
- a method for fabricating a TFT, an active layer encapsulating a gate insulating layer and a gate electrode and forming a gate insulating layer containing aluminum oxide, thereby making the gate insulating layer better than the etch barrier layer The etch selectivity prevents over-etching of the gate and active layers during the etch process. Because of the better compactness of alumina, hydrogen and water vapor are effectively prevented from diffusing into the gate insulating layer and the gate electrode, thereby making the electrical properties of the TFT more stable.
- the thickness of the gate insulating layer can be better controlled, and the threshold voltage of the TFT can be better adjusted to reduce the loss of electric energy during charging.
- the embodiment of the present invention further provides a method of preparing the TFT of Embodiment 2. After the forming the first gate insulating layer encasing the gate, wherein the material of the first gate insulating layer comprises aluminum oxide, the method further comprises:
- a plasma of nitrogen and oxygen wherein the plasma of nitrogen and oxygen can be ionized by a magnetron sputtering apparatus under a certain pressure, magnetic field and electric field by a combination gas of nitrogen and oxygen, nitrogen monoxide and oxygen. form.
- the power density is 0.2-5 watts per square centimeter
- the partial pressure of oxygen is 0.2-1.2 Pa
- the plasma bombardment material of nitrogen and oxygen is caused by the action of the magnetic field.
- the first gate insulating layer 3 of aluminum oxide causes plasma of nitrogen and oxygen to enter the first gate insulating layer 3 and react with the aluminum oxide to form aluminum oxynitride.
- a second gate insulating layer 10 is formed on the surface of the first gate insulating layer 3.
- the structure of the prepared TFT array substrate is as shown in FIG. 6. Shown.
- the preparation of the second gate insulating layer 3 can be achieved by in-situ reaction, and the realization process of producing aluminum oxynitride is as follows:
- the introduction of nitrogen element can suppress the penetration of impurity ions and passivate the interface state, thereby improving the reliability of the transistor and better controlling the electrical properties of the TFT.
- the thickness of the second gate insulating layer 10 is thickened as the reaction time increases, so it is necessary to set a reasonable reaction time so that the finally formed TFT has better conductivity.
- the first gate insulating layer 3 is subjected to a treatment for 100 seconds to obtain a second gate insulating layer 10 having a thickness of about 2.7 nm.
- the process of preparing the first gate insulating layer 3 and the second gate insulating layer 10 can also be realized by chemical vapor deposition. Since the gas introduced into the chemical vapor deposition apparatus is the same as the gas introduced into the magnetron sputtering apparatus, the processing is similar, and therefore will not be described again.
- the structure of the array substrate is as shown in FIG. 5, and the structure is similar, and details are not described herein again.
- a second gate insulating layer encapsulating the first gate insulating layer is formed. After the material of the second gate insulating layer includes aluminum oxynitride, the method further includes:
- Nitrogen and oxygen are introduced into the heating device, and annealing treatment is performed at 450 degrees for 10 minutes to 2 hours to remove the stress of the first gate insulating layer 2 and the second gate insulating layer 10, thereby reducing the first gate.
- the pole insulating layer 2 and the second gate insulating layer 10 are deformed and have a tendency to crack, thereby improving the physical properties of the TFT array substrate.
- an embodiment of the present invention provides a method of preparing the TFT of Embodiment 3. Forming a gate on the substrate, specifically:
- a copper layer is formed on the substrate 1 by a magnetron sputtering device, and a first patterning process is performed by exposure and development, and etching is performed by etching an etching gas to form an inner gate layer 2a as shown in FIGS. 3 and 7. . 100b, depositing an aluminum layer to form an outer gate layer encasing the inner gate layer.
- the first gate insulating layer 3 including aluminum oxide and the second gate insulating layer 10 including aluminum oxynitride are formed on the outer gate layer 2a through steps 101 and 103, and will not be described again.
- the conductivity of copper is better than that of aluminum
- the conductivity of the gate 2 of the layered structure is significantly better than that of the gate 2 of the single layer of aluminum, thereby improving the conductivity of the TFT and the corresponding TFT array substrate, so that the TFT has more With good electrical conductivity, the pixel electrode 8 can be charged faster in the TFT array substrate.
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Abstract
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CN104576757B (zh) * | 2014-12-31 | 2017-07-18 | 深圳市华星光电技术有限公司 | 侧栅极tft开关及液晶显示装置 |
CN108780620A (zh) * | 2016-03-15 | 2018-11-09 | 夏普株式会社 | 有源矩阵基板 |
CN110352452B (zh) * | 2017-02-28 | 2021-09-28 | 夏普株式会社 | 配线基板和显示装置 |
CN107293493A (zh) * | 2017-06-06 | 2017-10-24 | 武汉华星光电技术有限公司 | 铟镓锌氧化物薄膜晶体管的制作方法 |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1941288A (zh) * | 2005-09-27 | 2007-04-04 | 株式会社半导体能源研究所 | 半导体器件、半导体器件的制造方法、液晶显示器件、rfid标签、发光器件以及电子器具 |
CN101527322A (zh) * | 2009-04-07 | 2009-09-09 | 浙江大学 | 一种可弯曲全透明ZnMgO薄膜晶体管及其制备方法 |
CN101794823A (zh) * | 2009-02-04 | 2010-08-04 | 索尼公司 | 薄膜晶体管和显示装置 |
CN102097486A (zh) * | 2009-12-15 | 2011-06-15 | 三星移动显示器株式会社 | 薄膜晶体管及其制造方法以及有机电致发光设备 |
CN102723359A (zh) * | 2012-06-13 | 2012-10-10 | 京东方科技集团股份有限公司 | 薄膜晶体管及其制作方法、阵列基板、显示装置 |
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CN100483232C (zh) | 2006-05-23 | 2009-04-29 | 北京京东方光电科技有限公司 | 一种tft lcd阵列基板结构及其制造方法 |
KR102149626B1 (ko) * | 2008-11-07 | 2020-08-28 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | 반도체 장치의 제작 방법 |
TWI540647B (zh) | 2008-12-26 | 2016-07-01 | 半導體能源研究所股份有限公司 | 半導體裝置及其製造方法 |
US8013339B2 (en) * | 2009-06-01 | 2011-09-06 | Ishiang Shih | Thin film transistors and arrays with controllable threshold voltages and off state leakage current |
WO2011118351A1 (en) * | 2010-03-25 | 2011-09-29 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device |
JP2012004371A (ja) * | 2010-06-17 | 2012-01-05 | Sony Corp | 薄膜トランジスタおよび表示装置 |
-
2012
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- 2012-11-13 WO PCT/CN2012/084542 patent/WO2013185433A1/zh active Application Filing
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1941288A (zh) * | 2005-09-27 | 2007-04-04 | 株式会社半导体能源研究所 | 半导体器件、半导体器件的制造方法、液晶显示器件、rfid标签、发光器件以及电子器具 |
CN101794823A (zh) * | 2009-02-04 | 2010-08-04 | 索尼公司 | 薄膜晶体管和显示装置 |
CN101527322A (zh) * | 2009-04-07 | 2009-09-09 | 浙江大学 | 一种可弯曲全透明ZnMgO薄膜晶体管及其制备方法 |
CN102097486A (zh) * | 2009-12-15 | 2011-06-15 | 三星移动显示器株式会社 | 薄膜晶体管及其制造方法以及有机电致发光设备 |
CN102723359A (zh) * | 2012-06-13 | 2012-10-10 | 京东方科技集团股份有限公司 | 薄膜晶体管及其制作方法、阵列基板、显示装置 |
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