WO2015089964A1 - 薄膜晶体管及其制备方法、阵列基板及其制备方法、以及显示装置 - Google Patents
薄膜晶体管及其制备方法、阵列基板及其制备方法、以及显示装置 Download PDFInfo
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- WO2015089964A1 WO2015089964A1 PCT/CN2014/075499 CN2014075499W WO2015089964A1 WO 2015089964 A1 WO2015089964 A1 WO 2015089964A1 CN 2014075499 W CN2014075499 W CN 2014075499W WO 2015089964 A1 WO2015089964 A1 WO 2015089964A1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/01—Manufacture or treatment
- H10D30/021—Manufacture or treatment of FETs having insulated gates [IGFET]
- H10D30/031—Manufacture or treatment of FETs having insulated gates [IGFET] of thin-film transistors [TFT]
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- H—ELECTRICITY
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- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/67—Thin-film transistors [TFT]
- H10D30/674—Thin-film transistors [TFT] characterised by the active materials
- H10D30/6755—Oxide semiconductors, e.g. zinc oxide, copper aluminium oxide or cadmium stannate
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/01—Manufacture or treatment
- H10D86/021—Manufacture or treatment of multiple TFTs
- H10D86/0221—Manufacture or treatment of multiple TFTs comprising manufacture, treatment or patterning of TFT semiconductor bodies
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- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/01—Manufacture or treatment
- H10D86/021—Manufacture or treatment of multiple TFTs
- H10D86/0231—Manufacture or treatment of multiple TFTs using masks, e.g. half-tone masks
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- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
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- H—ELECTRICITY
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- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
- H10D86/421—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs having a particular composition, shape or crystalline structure of the active layer
- H10D86/423—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs having a particular composition, shape or crystalline structure of the active layer comprising semiconductor materials not belonging to the Group IV, e.g. InGaZnO
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- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
- H10D86/60—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs wherein the TFTs are in active matrices
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- H—ELECTRICITY
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- H10D99/00—Subject matter not provided for in other groups of this subclass
Definitions
- the present invention relates to the field of display technologies, and in particular, to a thin film transistor (TFT) and a method of fabricating the same, an array substrate including the same, a method for fabricating the same, and a display substrate including the array substrate.
- TFT thin film transistor
- TFTs Thin film transistors
- the carrier mobility of the oxide TFT is as high as 10 cm 2 /Vs, which is about 10 times that of the former, and the oxide TFT can be prepared by a sputtering process, and the material of the i material is changed upon introduction. You can do it without changing your existing production line.
- each pixel unit of the OLED array substrate includes two thin film transistors: a switching TFT and a driving TFT.
- Driving TFT The drain electrode of the Switching TFT needs to be electrically connected to the gate electrode of the Driving TFT.
- the method for fabricating the bottom-gate thin film transistor of the OLED array substrate includes seven patterning processes, that is, using seven masks, for example, including the following steps Sl1 to S17.
- Step Sl i a gate electrode 102 of a Switching TFT and a germanium electrode 102 of a Driving TFT are formed on the base substrate 101, and a gate insulating layer (GI) 103 is deposited on the gate electrode 102 and the gate electrode 102'.
- GI gate insulating layer
- the process of forming the gate electrode 102 and the germanium electrode 102' includes: forming a gate electrode layer film, and forming a pattern including the germanium electrode 102 and the gate electrode 102' by a one-time patterning process (IMask).
- IMask one-time patterning process
- Step S12 forming an active layer 104 on the germanium insulating layer 103.
- the material of the active layer may be indium gallium zinc oxide (IGZO).
- the process of forming the active layer 104 includes: forming an active layer film, and forming a pattern including an active layer by a single patterning process (2 Mask).
- the step forms an Etch Stop Layer (ESL) 105 on the active layer 104.
- the process of forming the etch stop layer 105 includes: forming an etched ffi barrier film, and forming a pattern including the engraved barrier layer 105 by a single patterning process (3 Mask).
- Steps An opening for connecting the gate electrode 102' of the Driving TFT and the drain electrode of the subsequently formed Switching TFT is formed on the gate insulating layer 103 above the * electrode of the Driving TTT.
- the process of forming the opening includes: forming a gate insulating layer pattern including the opening by a patterning process (4Mask).
- Step The source electrode 1061 and the drain electrode 1062 are formed on the substrate on which the above steps are completed.
- the process of forming the source electrode 1061 and the drain electrode 1062 includes forming a source/drain film, and forming a pattern including the source electrode 1061 and the drain electrode 1062 by a single patterning process (5Mask).
- Step A protective layer (PVX) 107 is deposited, and an opening for connecting the gate electrode 102 of the Driving TFT and the drain electrode 1062 of the Switch TFT is formed on the drain electrode 1062 of the Switch TFT and the protective layer 107 over the gate electrode of the Driving TFT.
- the process of forming the opening includes: forming a pattern of the protective layer including the opening by a patterning process (6Mask).
- Step S17 forming a conductive pattern 108 on the protective layer 107, and the conductive pattern may be made of radium tin oxide (ITO).
- ITO radium tin oxide
- the process of forming the conductive pattern 108 includes: forming a transparent conductive film, and forming a pattern including the conductive pattern 108 by a patterning process (7Mask).
- FIG. 2 is a schematic flow chart showing another method of fabricating a bottom gate thin film transistor of an OLED column substrate in the prior art. As shown in Fig. 2, the method includes six patterning processes, that is, using six masks, for example, including the following steps S2i to S26.
- Step S21 A gate electrode 202 of a Switching TFT and a gate electrode 202' of a Driving TFT are formed on the base substrate 201, and a gate insulating layer (GI) 203 is deposited on the germanium electrode 202 and the gate electrode 202'.
- GI gate insulating layer
- the process of forming the gate electrode 202 and the germanium electrode 202' includes: forming a gate electrode layer film, and forming a pattern including the electrode electrode 202 and the cell electrode 202' by a one-time patterning process (IMask).
- IMask one-time patterning process
- Step S22 forming an active layer 204 on the gate insulating layer 203.
- the process of forming the active layer 204 includes: forming an active layer film by one patterning process (2) Mask) forms a pattern including an active layer.
- Step S23 forming an etch stop layer 205 on the active layer 204.
- the process of forming the etch stop layer 205 includes: forming an engraved barrier film, and forming a pattern including the etched ffi barrier layer 205 by a single patterning process (3 Mask).
- Step S24 The source electrode 2061 and the drain electrode 2062 are formed.
- the process of forming the source electrode 2061 and the drain electrode 2062 includes forming a source/drain film, and forming a pattern including the source electrode 2061 and the drain electrode 2062 by a patterning process (4Mask).
- Step S25 forming a protective layer 207, and performing via etching on the protective layer 207, and the different engraving ratios of different atmospheres in the atmosphere environment adopted by the ffi-etching process ensure the drain electrode (Drain) 2062 of the Switching TFT Under the premise that the metal is not etched away, the insulating layer 203 on the gate electrode 202' of the Driving TFT is cleaned and an opening for connecting the gate electrode 202' of the Dnving TFT and the drain electrode 2062 of the Switching TFT is formed.
- Step S26 A conductive pattern 208 is formed on the protective layer 207.
- the process of forming the conductive pattern 208 includes: forming a transparent conductive film, and forming a pattern including the conductive pattern 208 by a single patterning process (6 Mask).
- the present invention provides a thin film transistor, a method for fabricating the same, an array substrate, a method for fabricating the same, and a display device to solve the problem of the complicated TFT preparation process.
- a method for fabricating a thin film transistor comprising:
- a pattern including a source electrode, a drain electrode, and an active layer by one patterning process, wherein the source electrode, the drain electrode, and the active layer are disposed in the same layer, and the active layer is located at the source electrode and the drain Between the poles.
- forming the pattern including the source electrode, the drain electrode, and the active layer by one patterning process includes:
- Forming a metal oxide conductor film Forming a photoresist layer covering the metal oxide conductor film, exposing and developing the photoresist layer by a half exposure technique to form a photoresist retention region corresponding to the source electrode region and the drain electrode region, corresponding to active a photoresist semi-reserved region of the layer region, and a photoresist removal region;
- the photoresist is stripped to expose the source electrode, the drain electrode, and the active layer between the source and drain electrodes.
- forming the pattern including the source electrode, the drain electrode, and the active layer by a monolithic process includes:
- a photoresist layer covering the metal oxide semiconductor film Forming a photoresist layer covering the metal oxide semiconductor film, exposing and developing the photoresist layer by a half exposure technique to form a photoresist semi-reserved region corresponding to the source electrode region and the drain electrode region, corresponding to active a photoresist retention region of the layer region, and a photoresist removal region;
- the metal oxide semiconductor film is ion-implanted so that the metal oxide semiconductor film corresponding to the source electrode region and the drain electrode region becomes a conductor to form a source electrode and a drain electrode; and the active layer is protected by a photoresist and is still a semiconductor;
- the method further includes:
- the forming of the metal oxide conductor film or the forming of the metal oxide semiconductor film is: forming a metal oxide conductor film or a metal oxide semiconductor film on the electrode insulating layer.
- a method of fabricating a thin film transistor array substrate includes: forming a pattern including a source electrode, a drain electrode, a pixel electrode, and an active layer by one patterning process, wherein the source electrode, the drain electrode, the pixel electrode, and the active layer are disposed in the same layer, and the A source layer is between the source electrode and the drain electrode.
- forming the pattern including the source electrode, the drain electrode, the pixel electrode, and the active layer by one patterning process includes:
- a photoresist layer covering the metal oxide conductor film, exposing and developing the photoresist layer by a half exposure technique to form a photoresist retention region corresponding to the source electrode region, the drain electrode region and the pixel electrode region , a photoresist semi-reserved area corresponding to the active layer region, and a photoresist removal region;
- the metal oxide conductor film corresponding to the active layer region becomes a semiconductor, forming an active layer; the source electrode, the drain electrode and the pixel electrode are protected by a photoresist, and are still conductors;
- the photoresist layer is exposed, developed and shaped, and the photoresist of the source electrode region, the drain electrode region and the active layer is left to form a protective layer, and the photoresist of the pixel electrode region is removed.
- forming the pattern including the source electrode, the drain electrode, and the active layer by a monolithic process includes:
- a photoresist layer covering the metal oxide semiconductor film Forming a photoresist layer covering the metal oxide semiconductor film, exposing and developing the photoresist layer by a half exposure technique to form a photoresist semi-reserved region corresponding to the source electrode region, the drain electrode region and the pixel electrode, a photoresist retention region corresponding to the active layer region, and a photoresist removal region;
- the metal oxide semiconductor film is ion-implanted, and the metal oxide semiconductor film corresponding to the source electrode region, the drain electrode region and the pixel electrode region becomes a conductor, and the source electrode, the drain electrode and the pixel electrode are formed; and the active layer is protected by photoresist , still semiconductor; and
- the method further includes:
- the metal oxide semiconductor thin film or the metal oxide semiconductor thin film is formed by forming a metal oxide conductive film or a metal oxide semiconductor thin film on the gate insulating layer.
- a thin film transistor including a gate electrode, a gate insulating layer, an active layer, a source electrode, and a drain electrode, the active layer and the source electrode, the drain electrode is provided The same layer is disposed and located between the source electrode and the drain electrode.
- the material of the active layer is a metal oxide semiconductor material
- the material of the source electrode and the drain electrode is a metal oxide conductor material
- the active layer is formed by ion implantation of a metal oxide conductor film in a region between the source electrode and the drain electrode, or the source electrode and the drain electrode pass
- the metal oxide semiconductor thin film on both sides of the active layer is formed by ion implantation.
- a thin film transistor column substrate including a gate electrode, a gate insulating layer, an active layer, a source electrode, a drain electrode, and a pixel electrode, the active layer and the source electrode is provided
- the drain electrode and the pixel electrode are disposed in the same layer.
- the material of the active layer is a metal oxide semiconductor material
- the material of the source electrode and the drain electrode is a metal oxide conductor material
- the active layer is formed by ion implantation of a metal oxide conductor film in a region between the source electrode and the drain electrode, or the source electrode and the drain electrode pass
- the metal oxide semiconductor thin film on both sides of the active layer is formed by ion implantation.
- the array substrate includes:
- a gate insulating layer formed on the electrode electrode; An active layer, a source electrode, a drain electrode, and a pixel electrode formed on the » insulating layer; and a protective layer formed over the active layer, the source electrode, and the drain electrode.
- a display device comprising the above thin film transistor array substrate.
- the pattern of the source electrode, the drain electrode and the active layer of the TFT formed by one patterning process reduces the number of patterning processes in the preparation process of the thin film transistor, and simplifies the preparation process.
- the pattern of the source electrode, the drain electrode, the pixel electrode and the active layer of the TFT column substrate is formed by one patterning process, which reduces the number of patterning processes in the preparation process of the TFT array substrate, and simplifies the preparation process.
- FIG. 1 is a schematic flow chart showing a method of fabricating a bottom gate thin film transistor of an OLED array substrate in the prior art.
- FIG. 2 is a schematic flow chart showing another method for fabricating a bottom gate type thin film transistor of an OLED array substrate in the prior art.
- Fig. 3 is a flow chart showing a method of fabricating a thin film transistor column substrate according to Embodiment 1 of the present invention.
- 4 is a schematic structural view of a thin film transistor array substrate according to Embodiment 2 of the present invention.
- a method of fabricating a thin film transistor comprising: forming a pattern including a source electrode, a drain electrode, and an active layer by a patterning process, wherein the source electrode, the drain electrode, and the active layer The layers are disposed in the same layer, and the active layer is located between the source electrode and the drain electrode.
- the source electrode, the drain electrode, and the active layer disposed in the same layer can be formed in the following two ways.
- the pattern forming the source electrode, the drain electrode, and the active layer by one patterning process may include the following steps A1 to E1.
- Step Ah forms a metal oxide conductor film.
- Step B1 forming a photoresist layer covering the metal oxide conductor film, exposing and developing the photoresist layer by a half exposure technique to form a photoresist retention region corresponding to the source electrode region and the drain electrode region, corresponding to A photoresist semi-reserved region of the active layer region, and a photoresist removal region.
- the thickness of the photoresist layer of the source electrode region and the drain electrode region is greater than the thickness of the photoresist layer of the active layer region.
- Step C etching the metal oxide conductor film, and the metal oxide conductor film of the photoresist removal region is removed.
- Step D1 ion-implanting the metal oxide conductor film so that the metal oxide conductor film corresponding to the active layer region becomes a semiconductor to form an active layer; the source electrode and the drain electrode are protected by a photoresist, and are still conductors.
- the thickness of the photoresist layer in the source electrode region and the drain electrode region is large, the source electrode region and the drain electrode region are blocked by the photoresist layer during ion implantation, and the thickness of the photoresist layer in the active layer region is larger. Thin, corresponding metal oxide conductor film is implanted with a metal element to form a semiconductor.
- Step E1 The photoresist is stripped to expose the source electrode, the drain electrode, and the active layer between the source electrode and the drain electrode.
- the pattern forming the source electrode, the drain electrode, and the active layer by the one-time process may include the following steps A2 to E2.
- Step A2 forming a metal oxide semiconductor film.
- Step B2 forming a photoresist layer covering the metal oxide semiconductor film, exposing and developing the photoresist layer by a half exposure technique to form a photoresist semi-reserved region corresponding to the source electrode region and the drain electrode region, Corresponding to the photoresist retention area of the active layer region, and the photoresist removal region.
- the thickness of the photoresist layer in the active layer region is greater than the thickness of the photoresist layer in the source electrode region and the drain electrode region.
- Step C2 etching the metal oxide semiconductor thin film, the metal oxide semiconductor thin film of the photoresist removal region is removed.
- Step D2 performing ion implantation on the metal oxide semiconductor film so that the metal oxide semiconductor film corresponding to the source electrode region and the drain electrode region becomes a conductor to form a source electrode and a drain electrode; and the photoresist is protected on the active layer, ⁇ semiconductor.
- the active layer region is photoresist by ion implantation.
- the layer is blocked, and the thickness of the photoresist layer of the source electrode region and the drain electrode region is thin, and the corresponding metal oxide semiconductor film is implanted with a metal element to form a conductor.
- Step E2 The photoresist is stripped to expose the source electrode, the drain electrode, and the active layer between the source and drain electrodes.
- the metal oxide may be, for example, indium zinc oxide (IZO), indium tin oxide (yttrium), zinc oxide, tin oxide or the like.
- IZO indium zinc oxide
- yttrium indium tin oxide
- zinc oxide tin oxide or the like.
- the ion-implanted metal may be, for example, tin (Sn) or zinc (Zn).
- the photoresist may be, for example, a resin.
- the method before the forming the metal oxide conductor film or before forming the metal oxide semiconductor film, the method further includes: forming a pattern of the gate electrode on the substrate by one patterning process; A cabinet insulating layer is formed on the cabinet electrode.
- the forming the metal oxide conductor film or the forming the metal oxide semiconductor film is specifically: forming a metal oxide conductor film or a metal oxide semiconductor film on the gate insulating layer.
- the above preparation method requires only two patterning processes to complete the preparation of the thin film transistor, reducing the number of patterning processes and simplifying the preparation process.
- a method for fabricating a thin film transistor array substrate comprising: forming a pattern including a source electrode, a drain electrode, a pixel electrode, and an active layer by a patterning process, wherein The source electrode, the drain electrode, the pixel electrode, and the active layer are disposed in the same layer, and the active layer is located between the source electrode and the drain electrode.
- the source electrode, the drain electrode, the pixel electrode, and the active layer disposed in the same layer can be formed in the following two ways.
- the pattern forming the source electrode, the drain electrode, the pixel electrode, and the active layer by one patterning process may include the following steps A3 to E3.
- Step A3 Forming a metal oxide conductor film.
- Step B3 forming a photoresist layer covering the metal oxide conductor film, exposing and developing the photoresist layer by a half exposure technique to form a photoresist corresponding to the source electrode region, the drain electrode region and the pixel electrode region a reserved area, a photoresist semi-reserved area corresponding to the active layer region, and a photoresist removal area.
- the thickness of the photoresist layer of the source electrode region and the drain electrode region is greater than that of the active layer region The thickness of the glue layer.
- Step C3 etching the metal oxide conductor film, and the metal oxide conductor film of the photoresist removal region is removed.
- Step D3 performing ion implantation on the metal oxide conductor film so that the metal oxide conductor film corresponding to the active layer region becomes a semiconductor to form an active layer; the source electrode, the drain electrode and the pixel electrode are protected by photoresist, and are still conductor.
- the thickness of the photoresist layer in the source electrode region and the drain electrode region is large, the source electrode region and the drain electrode region are blocked by the photoresist layer during ion implantation, and the thickness of the photoresist layer in the active layer region is larger. Thin, corresponding metal oxide conductor film is implanted with a metal element to form a semiconductor.
- Step E3 exposing, developing and shaping the photoresist layer, leaving the photoresist of the source electrode region, the drain electrode region and the active layer to form a protective layer, and removing the photoresist of the pixel electrode region.
- the pattern forming the source electrode, the drain electrode, and the active layer by the primary formation process may include the following steps A4 to E4.
- Step A4 forming a metal oxide semiconductor film.
- Step B4 forming a photoresist layer covering the metal oxide semiconductor film, exposing and developing the photoresist layer by a half exposure technique to form a photoresist half corresponding to the source electrode region, the drain electrode region and the pixel electrode a reserved area, a photoresist retention area corresponding to the active layer region, and a photoresist removal area.
- the thickness of the photoresist layer in the active layer region is greater than the thickness of the photoresist layer in the source electrode region and the drain electrode region.
- Step C4 etching the metal oxide semiconductor thin film, the metal oxide semiconductor thin film of the photoresist removal region is removed.
- Step D4 performing ion implantation on the metal oxide semiconductor film to form a metal oxide semiconductor film corresponding to the source electrode region, the drain electrode region and the pixel electrode region as a conductor, forming a source electrode, a drain electrode and a pixel electrode; The photoresist is protected and remains a semiconductor.
- the thickness of the photoresist layer in the active layer region is large, the active layer region is blocked by the photoresist layer during ion implantation, and the thickness of the photoresist layer in the source electrode region and the drain electrode region is relatively thin, corresponding to
- the metal oxide semiconductor film is implanted with a metal element to form a conductor.
- Step E4 exposing, developing and shaping the photoresist layer, leaving the photoresist of the source electrode region, the drain electrode region and the active layer to form a protective layer, and removing the photoresist of the pixel electrode region.
- the curing of the developed photoresist layer in the above embodiments means: heating the developed photoresist layer to volatilize the organic solvent in the photoresist layer, and performing liquid lithography. The glue layer is cured.
- the metal oxide may be, for example, indium zinc oxide (ITO), indium tin oxide ( ⁇ ?), zinc oxide, tin oxide, or the like;
- the ion-implanted metal may be, for example, tin (Sn) or zinc (Zii);
- the photoresist may be, for example, a resin.
- the method before the forming the metal oxide conductor film or before forming the metal oxide semiconductor film, the method further includes: forming a pattern including the gate electrode on the substrate by one patterning process; An » insulating layer is formed on the » electrode.
- the forming the metal oxide semiconductor thin film or the forming the metal oxide semiconductor thin film is specifically: forming a metal oxide conductor film or a metal oxide semiconductor thin film on the » insulating layer.
- a thin film transistor including a gate electrode, a gate insulating layer, an active layer, a source electrode, and a drain electrode is provided, wherein the active layer and the source electrode The drain electrode is disposed in the same layer and is located between the source electrode and the drain electrode.
- the material of the active layer is a metal oxide semiconductor material, and the material of the source electrode and the drain electrode is a metal oxide conductor material.
- the active layer is formed by ion implantation of a conductive metal oxide film in a region between the source electrode and the drain electrode, or the source electrode and the drain electrode are through a pair
- the metal oxide semiconductor thin film on both sides of the active layer is formed by ion implantation.
- a thin film transistor array substrate includes a gate electrode, a gate insulating layer, an active layer, a source electrode, a drain electrode, and a pixel electrode, wherein the active layer and the The source electrode, the drain electrode, and the pixel electrode are disposed in the same layer.
- the material of the active layer is a metal oxide semiconductor material, and the material of the source electrode and the drain electrode is a metal oxide conductor material.
- the active layer is formed by ion implantation of a conductive metal oxide film in a region between the source electrode and the drain electrode, or the source electrode and the drain electrode are through a pair
- the metal oxide semiconductor thin film on both sides of the active layer is formed by ion implantation.
- the array substrate may include, for example:
- a display device including the above-described thin film transistor column substrate is provided.
- the structure and working principle of the array substrate are the same as those in the above embodiments, and will not be further described herein.
- the structure of other parts of the display device can refer to the prior art, and will not be described in detail.
- the display device of the present invention may be, for example, a liquid crystal panel, an electronic paper, an OLED (Organic Light Emitting Diode) panel, a liquid crystal television, a liquid crystal display, a digital photo frame, a mobile phone, a tablet computer, or the like, or any display product or component. .
- each pixel unit of the OLED array substrate includes two thin film transistors, a switching TFT and a driving TFT, wherein the drain electrode of the Switching TFT needs to be electrically connected to the gate electrode of the driving TFT, and the following embodiments
- the Switching TFT is actually formed simultaneously with the Driving TFT, and the preparation process is similar to that of the Driving TFT, and will not be described in detail.
- 3 is a schematic flow chart of a method for fabricating a bottom-gate thin film transistor array substrate of an OLED column substrate according to Embodiment 1 of the present invention. As shown in FIG. 3, the method includes:
- a substrate 301 is provided in step S3 h.
- Step S32 forming a gate electrode 302 on the base substrate 301.
- the method of forming the gate electrode 302 includes: forming a thin film of a pole electrode layer, and forming a pattern including the electrode electrode 302 by a patterning process (IMask).
- IMask a patterning process
- Step S33 forming a gate insulating layer (GI) 303 on the gate electrode 302: and in the gate An opening (not shown) for connecting the drain electrode pattern of the gate electrode 302 and the subsequently formed Switching TFT is formed on the edge layer 303.
- GI gate insulating layer
- the method of forming the opening includes: forming a gate insulating layer pattern including the opening by a patterning process (2Mask).
- Step S34 A metal oxide conductor film 401 is formed on the gate insulating layer 303.
- the metal oxide conductor film 401 may be deposited by a sputtering technique, and the metal oxide may be, for example, IZO.
- Step S35 coating a photoresist layer covering the metal oxide conductor film, exposing and developing the photoresist layer by using a halftone mask to form a corresponding source electrode region, a drain electrode region, and a pixel. a photoresist retention region 402 of the electrode region, a photoresist semi-retention region 403 corresponding to the active layer region, and a photoresist removal region (not shown); etching the metal oxide conductor film, the light The metal oxide conductor film of the glue removal zone is removed.
- an L5 ⁇ 2.5 micron thick photoresist layer may be spin-coated on the metal oxide conductor film 401.
- the thickness of the photoresist layer of the source electrode region and the drain electrode region is greater than the thickness of the photoresist layer of the active layer region.
- a photoresist retention region 402 corresponding to the source electrode region and the drain electrode region, a photoresist half-retention region 403 corresponding to the active layer region, and a photoresist removal region are formed by one patterning process (3Mask).
- Step S36 performing ion implantation on the metal oxide conductor film 401 so that the metal oxide conductor film corresponding to the active layer region becomes a semiconductor, forming the active layer 304; and lithography over the source electrode 305, the drain electrode 306, and the pixel electrode 307 Glue protection, still a conductor.
- the ion-implanted metal element may be, for example, Sn.
- the thickness of the photoresist layer in the source electrode region and the drain electrode region is large, the source electrode region and the drain electrode region are blocked by the photoresist layer during ion implantation, and the thickness of the photoresist layer in the active layer region is larger. Thin, corresponding metal oxide conductor film is implanted with a metal element to form a semiconductor.
- Step S37 exposing, developing and shaping the photoresist layer, leaving the photoresist of the source electrode region, the drain electrode region and the active layer, forming a protective layer 308, removing the photoresist of the pixel electrode region, and exposing the pixel Electrode 307.
- the method for shaping treatment comprises: heating the exposed photoresist layer at 230 degrees Celsius for 1 hour to remove the organic solvent in the photoresist layer, thereby curing the photoresist layer to form a protective layer. .
- the method of forming the protective layer includes: forming a protective layer by one patterning process (4Mask).
- the metal oxide is simultaneously used as the source electrode, the drain electrode, the material of the pixel electrode, and the material of the active layer are formed on the surface of the gate insulating layer at one time, thereby reducing the source/drain electrode metal material and the pixel electrode.
- the separate deposition, exposure, development, and etching processes of the material reduce the number of patterning processes.
- the preparation of the existing etched insulating layer is reduced, that is, the process of depositing, exposing, developing, and etching the etched insulating layer is reduced, and the resin layer for the ffi barrier is used as a material of the protective layer, thereby eliminating the need for Extra thousands of craftsmanship.
- FIG. 4 is a schematic structural view of a thin film transistor array substrate according to Embodiment 2 of the present invention. As shown in FIG. 4, the array substrate is prepared by the preparation method in the above Embodiment 1, and the thin film transistor array substrate includes;
- Substrate substrate 301 Substrate substrate 301 ;
- a protective layer 308 is formed over the source electrode 305 and the drain electrode 306.
Landscapes
- Thin Film Transistor (AREA)
Abstract
Description
Claims
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| US14/424,721 US9698166B2 (en) | 2013-12-18 | 2014-04-16 | Thin film transistor, method for manufacturing thin film transistor, array substrate, method for manufacturing array substrate, and display device |
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| CN201310701255.6A CN103700707B (zh) | 2013-12-18 | 2013-12-18 | 薄膜晶体管、阵列基板及其制备方法、显示装置 |
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| CN103700707B (zh) * | 2013-12-18 | 2018-12-11 | 京东方科技集团股份有限公司 | 薄膜晶体管、阵列基板及其制备方法、显示装置 |
| CN103928343B (zh) * | 2014-04-23 | 2017-06-20 | 深圳市华星光电技术有限公司 | 薄膜晶体管及有机发光二极管显示器制备方法 |
| CN103972300B (zh) * | 2014-05-14 | 2015-09-30 | 京东方科技集团股份有限公司 | 一种薄膜晶体管及其制备方法、阵列基板、显示装置 |
| TW201606999A (zh) * | 2014-08-01 | 2016-02-16 | 中華映管股份有限公司 | 畫素結構及其製造方法 |
| CN104600083B (zh) * | 2015-01-29 | 2018-01-02 | 京东方科技集团股份有限公司 | 薄膜晶体管阵列基板及其制备方法、显示面板和显示装置 |
| CN104701264B (zh) * | 2015-03-25 | 2018-04-10 | 京东方科技集团股份有限公司 | 一种有机发光二极管显示面板及其制作方法、显示装置 |
| CN105226015B (zh) * | 2015-09-28 | 2018-03-13 | 深圳市华星光电技术有限公司 | 一种tft阵列基板及其制作方法 |
| CN106783869B (zh) * | 2016-09-07 | 2019-11-22 | 武汉华星光电技术有限公司 | 薄膜晶体管阵列基板及其制造方法 |
| US10228495B2 (en) * | 2016-09-08 | 2019-03-12 | Goodrich Corporation | Apparatus and methods of electrically conductive optical semiconductor coating |
| US10126656B2 (en) * | 2016-09-08 | 2018-11-13 | Goodrich Corporation | Apparatus and methods of electrically conductive optical semiconductor coating |
| CN108064414A (zh) * | 2016-11-23 | 2018-05-22 | 深圳市柔宇科技有限公司 | 阵列基板的制造方法 |
| CN108206182A (zh) * | 2017-12-28 | 2018-06-26 | 深圳市华星光电半导体显示技术有限公司 | 阵列基板及其制造方法 |
| CN109256464A (zh) * | 2018-11-08 | 2019-01-22 | 深圳市万普拉斯科技有限公司 | Oled显示装置 |
| CN109904210B (zh) * | 2019-03-27 | 2021-08-24 | 合肥鑫晟光电科技有限公司 | 一种显示基板及其制作方法、显示装置 |
| CN110690167A (zh) * | 2019-08-28 | 2020-01-14 | 晟光科技股份有限公司 | 一种基于tft阵列基板的制作方法 |
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| US9698166B2 (en) | 2017-07-04 |
| CN103700707A (zh) | 2014-04-02 |
| CN103700707B (zh) | 2018-12-11 |
| US20160035756A1 (en) | 2016-02-04 |
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