WO2012172714A1 - 表示装置、表示装置に用いられる薄膜トランジスタ、及び薄膜トランジスタの製造方法 - Google Patents
表示装置、表示装置に用いられる薄膜トランジスタ、及び薄膜トランジスタの製造方法 Download PDFInfo
- Publication number
- WO2012172714A1 WO2012172714A1 PCT/JP2012/001587 JP2012001587W WO2012172714A1 WO 2012172714 A1 WO2012172714 A1 WO 2012172714A1 JP 2012001587 W JP2012001587 W JP 2012001587W WO 2012172714 A1 WO2012172714 A1 WO 2012172714A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- semiconductor layer
- film transistor
- thin film
- display device
- ohmic contact
- Prior art date
Links
- 239000010409 thin film Substances 0.000 title claims abstract description 58
- 238000004519 manufacturing process Methods 0.000 title claims description 30
- 239000004065 semiconductor Substances 0.000 claims abstract description 78
- 239000010408 film Substances 0.000 claims abstract description 66
- 239000000758 substrate Substances 0.000 claims abstract description 35
- 238000005530 etching Methods 0.000 claims abstract description 32
- 239000011521 glass Substances 0.000 claims abstract description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 16
- -1 siloxane structure Chemical group 0.000 claims description 5
- 239000010410 layer Substances 0.000 description 105
- 238000005401 electroluminescence Methods 0.000 description 28
- 238000000034 method Methods 0.000 description 12
- 239000003990 capacitor Substances 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 6
- 229910021417 amorphous silicon Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 229910021419 crystalline silicon Inorganic materials 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001312 dry etching Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910004541 SiN Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
Images
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
- H01L27/1248—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 or shape of the interlayer dielectric specially adapted to the circuit arrangement
-
- 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
- H01L29/66075—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
- H01L29/6675—Amorphous silicon or polysilicon transistors
- H01L29/66765—Lateral single gate single channel transistors with inverted structure, i.e. the channel layer is formed after the 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
- H01L29/68—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
- H01L29/78696—Thin film transistors, i.e. transistors with a channel being at least partly a thin film characterised by the structure of the channel, e.g. multichannel, transverse or longitudinal shape, length or width, doping structure, or the overlap or alignment between the channel and the gate, the source or the drain, or the contacting structure of the channel
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
- H10K59/1213—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being TFTs
Definitions
- the present invention relates to a display device such as an organic EL (Electro Luminescence) display device, a thin film transistor used in the display device, and a method of manufacturing the thin film transistor.
- a display device such as an organic EL (Electro Luminescence) display device
- a thin film transistor used in the display device and a method of manufacturing the thin film transistor.
- organic EL display devices using current-driven organic EL elements have attracted attention as next-generation display devices.
- a field effect transistor is used.
- a switching transistor for controlling driving timing such as on / off of the organic EL element, and driving for controlling the light emission amount of the organic EL element is required.
- Each of these thin film transistors preferably has excellent transistor characteristics, and various studies have been made.
- an amorphous silicon film (amorphous silicon film) has been used as a channel formation region of such a thin film transistor.
- an amorphous silicon film has a low on-current due to low mobility. . Therefore, in recent years, research and development for crystallization of an amorphous silicon film using a heat treatment by a laser beam or the like has been advanced in order to secure the driving capability of the thin film transistor, that is, the on-current.
- this crystallized silicon film is used for a thin film transistor, after the ohmic contact layer is formed on the channel formation region, when the ohmic contact layer is processed, damage to the channel formation region remains, and the characteristics of the thin film transistor are reduced. There was a problem of deteriorating.
- the present invention is a display device that includes a display element and a thin film transistor that controls light emission of the display element.
- the thin film transistor is formed on a substrate so as to cover the gate electrode formed on an insulating substrate and the gate electrode.
- An etching stopper made of SOG (Spin on Glass) is provided on the channel formation region of the semiconductor layer.
- the present invention also relates to a thin film transistor used in a display device, a gate electrode formed on an insulating substrate, a gate insulating film formed on the substrate so as to cover the gate electrode, and the gate insulating film
- a semiconductor layer formed on the semiconductor layer, an ohmic contact layer formed on the semiconductor layer, a source electrode and a drain electrode formed on the ohmic contact layer so as to be separated from each other, and on a channel formation region of the semiconductor layer Is provided with an etching stopper made of SOG.
- the present invention is used in a display device, and includes a gate electrode, a gate insulating film formed on the substrate so as to cover the gate electrode, and a semiconductor layer formed on the gate insulating film, on the insulating substrate.
- a thin film transistor comprising: an ohmic contact layer formed on the semiconductor layer; and a source electrode and a drain electrode formed on the ohmic contact layer so as to be spaced apart from each other, the method comprising: A gate electrode, a gate insulating film, and a semiconductor layer are sequentially formed, and then an etching stopper made of SOG is formed on the channel formation region of the semiconductor layer, and then a film for forming an ohmic contact layer so as to cover the etching stopper By sequentially forming electrode films to be source and drain electrodes, and then processing by etching, ohmic Ntakuto layer and the source electrode, the drain electrode.
- a thin film transistor having stable characteristics can be provided without causing a significant increase in the number of steps.
- FIG. 1 is a partially cutaway perspective view of an organic EL display device as a display device according to an embodiment of the present invention.
- FIG. 2 is a circuit configuration diagram of a pixel of the display device according to the embodiment of the present invention.
- FIG. 3 is a cross-sectional view showing a device structure constituting an organic EL element and a drive transistor in one pixel of the display device according to the embodiment of the present invention.
- FIG. 4A is a cross-sectional view showing a configuration of a thin film transistor according to an embodiment of the present invention.
- FIG. 4B is a plan view showing a configuration of a thin film transistor according to an embodiment of the present invention.
- FIG. 5A is a cross-sectional view showing an example of a manufacturing process in the method of manufacturing a thin film transistor according to the embodiment of the present invention.
- FIG. 5B is a cross-sectional view showing an example of the manufacturing process in the method of manufacturing a thin film transistor according to the embodiment of the present invention.
- FIG. 5C is a cross-sectional view showing an example of a manufacturing process in the method of manufacturing a thin film transistor according to the embodiment of the present invention.
- FIG. 5D is a cross-sectional view showing an example of the manufacturing process in the method of manufacturing a thin film transistor according to the embodiment of the present invention.
- FIG. 5E is a cross-sectional view showing an example of a manufacturing process in the method of manufacturing a thin film transistor according to the embodiment of the present invention.
- FIG. 5F is a cross-sectional view showing an example of a manufacturing process in the method of manufacturing a thin film transistor according to the embodiment of the present invention.
- FIG. 5G is a cross-sectional view showing an example of a manufacturing process in the method of manufacturing a thin film transistor according to the embodiment of the present invention.
- FIG. 5H is a cross-sectional view showing an example of a manufacturing process in the method of manufacturing a thin film transistor according to the embodiment of the present invention.
- TFT Thin Film Transistor
- a display device according to an embodiment of the present invention will be described using an organic EL display device as an example.
- FIG. 1 is a partially cutaway perspective view of an organic EL display device as a display device according to an embodiment of the present invention.
- the organic EL display device includes an active matrix substrate 1, a plurality of pixels 2 arranged in a matrix on the active matrix substrate 1, and an array on the active matrix substrate 1 connected to the pixels 2.
- a plurality of pixel circuits 3 disposed on the pixel circuit 3; an EL element including an electrode 4 as an anode, an organic EL layer 5 and an electrode 6 as a cathode, which are sequentially stacked on the pixel 2 and the pixel circuit 3;
- a plurality of source wirings 7 and gate wirings 8 are connected to the control circuit.
- the organic EL layer 5 of the EL element is configured by sequentially laminating layers such as an electron transport layer, a light emitting layer, and a hole transport layer.
- FIG. 2 is a circuit configuration diagram of a pixel of the display device according to the embodiment of the present invention.
- the pixel 2 of the display device includes an organic EL element 11 as a display element, a drive transistor 12 configured by a thin film transistor for controlling the light emission amount of the organic EL element 11, and the organic EL element 11.
- a switching transistor 13 constituted by a thin film transistor for controlling the driving timing such as on / off of the capacitor and a capacitor 14.
- the source electrode 13S of the switching transistor 13 is connected to the source line 7, the gate electrode 13G is connected to the gate line 8, and the drain electrode 13D is connected to the capacitor 14 and the gate electrode 12G of the drive transistor 12.
- the drain electrode 12 ⁇ / b> D of the drive transistor 12 is connected to the power supply wiring 9, and the source electrode 12 ⁇ / b> S is connected to the anode of the organic EL element 11.
- the display device includes a display element and a thin film transistor that controls light emission of the display element.
- FIG. 3 is a cross-sectional view showing a device structure constituting an organic EL element and a drive transistor in one pixel of the organic EL display device according to the embodiment of the present invention.
- the organic EL display device includes a first interlayer insulating film 22 on an insulating support substrate 21 that is a TFT array substrate on which a driving transistor 12 and a switching transistor (not shown) are formed. , A second interlayer insulating film 23, a first contact portion 24, a second contact portion 25, and a bank 26. Further, as described with reference to FIG. 1, an electrode 4 as a lower anode, an organic EL layer 5, and an electrode 6 as an upper cathode are provided.
- the thin film transistor 30 included in the driving transistor 12 is a bottom-gate n-type thin film transistor.
- the gate electrode 31, the gate insulating film 32, the semiconductor layer 33, and the ohmic contact layer 34 are formed. And the source electrode 35S and the drain electrode 35D are sequentially stacked.
- 4A and 4B are a cross-sectional view showing a configuration of a thin film transistor 30 according to an embodiment of the present invention, and a plan view seen from the source electrode and drain electrode sides.
- the thin film transistor 30 is a bottom-gate n-type thin film transistor.
- the thin film transistor 30 includes a gate electrode 31, a gate insulating film 32, a first semiconductor layer 33a, a second semiconductor layer 33b, an etching stopper 36, an ohmic contact layer 34, a source electrode 35S, and a drain electrode 35D on a support substrate 21 as a substrate. Are sequentially laminated.
- the gate electrode 31 is arranged on the support substrate 21 made of an insulating substrate such as glass by forming an electrode material made of, for example, molybdenum (Mo) in a strip pattern.
- the gate electrode 31 is preferably made of a refractory metal material that is not easily altered by heat when there is a heating step in the manufacturing process.
- the gate insulating film 32 formed on the support substrate 21 so as to cover the gate electrode 31 uses at least one material selected from insulating materials such as SiO 2 , SiN, or SiON, and uses a plasma CVD (Chemical Vapor Deposition) method.
- the film is formed by stacking and forming a film so as to have a thickness of about 75 nm to 500 nm by a film forming method such as.
- the semiconductor layer 33 including the source electrode 35S, the drain electrode 35D, and the first semiconductor layer 33a and the second semiconductor layer 33b is formed on the gate insulating film 32 so as to cover the gate electrode 31.
- the first semiconductor layer 33a formed by being stacked on the gate insulating film 32 is formed of a crystalline silicon film containing crystalline silicon and having a thickness of 30 nm to 500 nm.
- the first semiconductor layer 33a may be formed by crystallizing a part of a stacked film made of a semiconductor material.
- the second semiconductor layer 33b formed by stacking on the first semiconductor layer 33a is preferably an amorphous silicon film having lower mobility than the first semiconductor layer 33a in order to suppress off-state current.
- a film containing crystalline silicon may be used.
- the ohmic contact layer 34 is formed on the semiconductor layer 33. That is, the ohmic contact layer 34 is for forming an ohmic contact between the source electrode 35S and the drain electrode 35D and the semiconductor layer 33 formed of the first semiconductor layer 33a and the second semiconductor layer 33b.
- the silicon film is formed of a material doped with impurities. Examples of the impurity include a Group V metal such as phosphorus (P) and a Group 3 metal.
- the ohmic contact layer 34 is removed except for the source electrode 35S and the drain electrode 35D, but the first semiconductor layer 33a, the second semiconductor layer 33b, and the ohmic contact layer. As for 34, the remaining part may exist in the peripheral part of source electrode 35S and drain electrode 35D.
- the source electrode 35S and the drain electrode 35D are arranged on the ohmic contact layer 34 by forming a pattern in a state of being separated from each other.
- the source electrode 35S and the drain electrode 35D are made of a single layer or two or more layers of metals such as titanium (Ti), tantalum (Ta), molybdenum (Mo), tungsten (W), aluminum (Al), and copper (Cu). It is composed of laminated films, and is formed with a film thickness of about 50 nm to 1000 nm.
- a sputtering method is used as a method for forming the source electrode 35S and the drain electrode 35D.
- the etching stopper 36 is formed on the channel formation region of the semiconductor layer 33 by photosensitive SOG having a siloxane structure such as silsesquioxane.
- the etching stopper 36 penetrates the second semiconductor layer 33b and damages the first semiconductor layer 33a when the source electrode 35S, the drain electrode 35D, and the ohmic contact layer 34 are processed into a predetermined pattern by etching.
- the channel formation region is formed to be protected.
- the film thickness of the etching stopper 36 is desirably 300 nm or more from the relationship between the fixed charge at the interface and the fixed charge in the film.
- the thin film transistor 30 is used in a display device, and on the insulating support substrate 21, the gate electrode 31, and the gate insulating film 32 formed on the support substrate 21 so as to cover the gate electrode 31, A semiconductor layer 33 formed on the gate insulating film 32, an ohmic contact layer 34 formed on the semiconductor layer 33, and a source electrode 35S and a drain electrode 35D formed on the ohmic contact layer 34 so as to be separated from each other; It has.
- 5A to 5H are cross-sectional views showing an example of a manufacturing process in the method for manufacturing a thin film transistor of the present invention.
- a gate electrode 31 is formed on a support substrate 21 as a substrate.
- a sputtering method is used to form the gate electrode 31, and a wet etching method using a photoresist mask, a dry etching method, or the like is used to process the pattern.
- a semiconductor layer 33 including a gate insulating film 32, a first semiconductor layer 33a, and a second semiconductor layer 33b is formed so as to cover the gate electrode 31.
- a CVD method is used to form the gate insulating film 32, the first semiconductor layer 33a, and the second semiconductor layer 33b.
- an etching stopper 36 is formed on the channel formation region of the semiconductor layer 33.
- the etching stopper 36 is formed only in the channel formation region of the semiconductor layer 33 after applying a photosensitive SOG material having a siloxane structure such as silsesquioxane to a desired thickness of 300 nm or more on the semiconductor layer 33. Then, it is processed into a predetermined pattern shape by photolithography.
- a film 37 for forming an ohmic contact layer 34 is formed so as to cover the etching stopper 36 and the semiconductor layer 33.
- a plasma CVD method is used for the raw film of the film 37 of the ohmic contact layer 34.
- an electrode film 38 to be a source electrode 35S and a drain electrode 35D is formed on the film 37 of the ohmic contact layer 34.
- a sputtering method is used to form the electrode film 38.
- the source film 35S and the drain electrode 35D are formed by processing the electrode film 38 by etching as shown in FIG. 5G. To do.
- the film 37 of the ohmic contact layer 34 and the semiconductor layer 33 are processed by a dry etching method.
- the etching stopper 36 is formed in the region of the semiconductor layer 33 where the channel is formed, the semiconductor layer 33 can be prevented from being damaged.
- the processing of the semiconductor layer 33 and the processing of the ohmic contact layer 34 can be performed at a time, and the manufacturing process of the thin film transistor can be reduced.
- the thin film transistor 30 includes the gate electrode 31 formed on the insulating support substrate 21 and the gate insulating film 32 formed on the support substrate 21 so as to cover the gate electrode 31.
- the source electrode 35 ⁇ / b> S and the drain electrode 35 ⁇ / b> D formed so as to be separated from each other, and an etching stopper 36 made of SOG is provided on the channel formation region of the semiconductor layer 33.
- the source electrode 35S, the drain electrode 35D, and the ohmic contact layer 34 are processed into a predetermined pattern by etching by the etching stopper 36, the second semiconductor layer 33b is penetrated to damage the first semiconductor layer 33a. It is possible to prevent the transistor characteristics from fluctuating. Moreover, by processing using the etching stopper 36 and the resist mask 39, the processing of the semiconductor layer 33 and the processing of the ohmic contact layer 34 can be performed at one time, and the manufacturing process of the thin film transistor can be reduced.
- the present invention is useful for obtaining a display device including a thin film transistor having stable characteristics without causing a significant increase in the number of steps.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Geometry (AREA)
- Thin Film Transistor (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
Description
以下、本発明の一実施の形態による薄膜トランジスタ(以下、「TFT(Thin Film Transistor)」とも略記する)及びその製造方法について図面を参照しながら説明する。
30 薄膜トランジスタ
31 ゲート電極
32 ゲート絶縁膜
33 半導体層
33a 第1半導体層
33b 第2半導体層
34 オーミックコンタクト層
35S ソース電極
35D ドレイン電極
36 エッチングストッパー
37 オーミックコンタクト層の膜
38 電極膜
39 レジストマスク
Claims (8)
- 表示素子と前記表示素子の発光を制御する薄膜トランジスタとを備えた表示装置であって、
前記薄膜トランジスタは、
絶縁性の基板上に形成されたゲート電極と、
前記ゲート電極を覆うように前記基板上に形成されたゲート絶縁膜と、
前記ゲート絶縁膜上に形成された半導体層と、
前記半導体層上に形成されたオーミックコンタクト層と、
前記オーミックコンタクト層上に互いに離間するように形成されたソース電極及びドレイン電極と
を備え、
かつ前記半導体層のチャネル形成領域上にSOG(Spin on Glass)からなるエッチングストッパーを設けている表示装置。 - 前記エッチングストッパーは、シロキサン構造を持つSOGである請求項1に記載の表示装置。
- 前記エッチングストッパーは、膜厚が300nmかそれよりも大きい値である請求項1に記載の表示装置。
- 表示装置に用いられる薄膜トランジスタであって、
絶縁性の基板上に形成されたゲート電極と、
前記ゲート電極を覆うように前記基板上に形成されたゲート絶縁膜と、
前記ゲート絶縁膜上に形成された半導体層と、
前記半導体層上に形成されたオーミックコンタクト層と、
前記オーミックコンタクト層上に互いに離間するように形成されたソース電極及びドレイン電極と
を備え、
かつ前記半導体層のチャネル形成領域上にSOG(Spin on Glass)からなるエッチングストッパーを設けている薄膜トランジスタ。 - 前記エッチングストッパーは、シロキサン構造を持つSOGである請求項4に記載の薄膜トランジスタ。
- 前記エッチングストッパーは、膜厚が300nmかそれよりも大きい値である請求項4に記載の薄膜トランジスタ。
- 表示装置に用いられ、絶縁性の基板上に、ゲート電極と、前記ゲート電極を覆うように前記基板上に形成されたゲート絶縁膜と、
前記ゲート絶縁膜上に形成された半導体層と、
前記半導体層上に形成されたオーミックコンタクト層と、
前記オーミックコンタクト層上に互いに離間するように形成されたソース電極及びドレイン電極とを備えた薄膜トランジスタの製造方法であって、
前記絶縁性の基板上にゲート電極とゲート絶縁膜と半導体層とを順次形成し、
その後半導体層のチャネル形成領域上にSOG(Spin on Glass)からなるエッチングストッパーを形成した後、
前記エッチングストッパーを覆うようにオーミックコンタクト層を形成するための膜とソース電極と、ドレイン電極となる電極膜を順次形成し、
その後エッチングにより加工することにより、オーミックコンタクト層とソース電極、ドレイン電極を形成する薄膜トランジスタの製造方法。 - 前記エッチングストッパーは、シロキサン構造を持つSOGである請求項7に記載の薄膜トランジスタの製造方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2012800016719A CN102959714A (zh) | 2011-06-17 | 2012-03-08 | 显示装置、显示装置中使用的薄膜晶体管及薄膜晶体管的制造方法 |
KR1020127031830A KR20130045270A (ko) | 2011-06-17 | 2012-03-08 | 표시 장치, 표시 장치에 이용되는 박막 트랜지스터, 및 박막 트랜지스터의 제조 방법 |
US13/616,673 US20130001572A1 (en) | 2011-06-17 | 2012-09-14 | Display device, thin-film transistor used for display device, and method of manufacturing thin-film transistors |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011134877 | 2011-06-17 | ||
JP2011-134877 | 2011-06-17 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/616,673 Continuation US20130001572A1 (en) | 2011-06-17 | 2012-09-14 | Display device, thin-film transistor used for display device, and method of manufacturing thin-film transistors |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012172714A1 true WO2012172714A1 (ja) | 2012-12-20 |
Family
ID=47356735
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/001587 WO2012172714A1 (ja) | 2011-06-17 | 2012-03-08 | 表示装置、表示装置に用いられる薄膜トランジスタ、及び薄膜トランジスタの製造方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20130001572A1 (ja) |
JP (1) | JPWO2012172714A1 (ja) |
KR (1) | KR20130045270A (ja) |
CN (1) | CN102959714A (ja) |
WO (1) | WO2012172714A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7585663B2 (ja) | 2020-08-26 | 2024-11-19 | Toppanホールディングス株式会社 | 固体撮像素子用フィルターの製造方法、固体撮像素子の製造方法、および、固体撮像素子用フィルター |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013111501B4 (de) | 2013-10-18 | 2024-02-08 | Universität Stuttgart | Dünnschichttransistor und Verfahren zu seiner Herstellung |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0997836A (ja) * | 1995-09-29 | 1997-04-08 | Sony Corp | コンタクトホールの形成方法 |
JP2011071440A (ja) * | 2009-09-28 | 2011-04-07 | Hitachi Displays Ltd | 有機el表示装置 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0828520B2 (ja) * | 1991-02-22 | 1996-03-21 | 株式会社半導体エネルギー研究所 | 薄膜半導体装置およびその製法 |
JP3392440B2 (ja) * | 1991-12-09 | 2003-03-31 | 株式会社東芝 | 多層導体層構造デバイス |
JP2944336B2 (ja) * | 1992-11-02 | 1999-09-06 | シャープ株式会社 | 配線構造 |
WO2004070823A1 (ja) * | 2003-02-05 | 2004-08-19 | Semiconductor Energy Laboratory Co., Ltd. | 表示装置の作製方法 |
JP2008124392A (ja) * | 2006-11-15 | 2008-05-29 | Sharp Corp | 半導体装置、その製造方法及び表示装置 |
-
2012
- 2012-03-08 KR KR1020127031830A patent/KR20130045270A/ko not_active Application Discontinuation
- 2012-03-08 CN CN2012800016719A patent/CN102959714A/zh active Pending
- 2012-03-08 WO PCT/JP2012/001587 patent/WO2012172714A1/ja active Application Filing
- 2012-03-08 JP JP2012544969A patent/JPWO2012172714A1/ja active Pending
- 2012-09-14 US US13/616,673 patent/US20130001572A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0997836A (ja) * | 1995-09-29 | 1997-04-08 | Sony Corp | コンタクトホールの形成方法 |
JP2011071440A (ja) * | 2009-09-28 | 2011-04-07 | Hitachi Displays Ltd | 有機el表示装置 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7585663B2 (ja) | 2020-08-26 | 2024-11-19 | Toppanホールディングス株式会社 | 固体撮像素子用フィルターの製造方法、固体撮像素子の製造方法、および、固体撮像素子用フィルター |
Also Published As
Publication number | Publication date |
---|---|
US20130001572A1 (en) | 2013-01-03 |
KR20130045270A (ko) | 2013-05-03 |
JPWO2012172714A1 (ja) | 2015-02-23 |
CN102959714A (zh) | 2013-03-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5015289B2 (ja) | 有機発光表示装置及びその製造方法 | |
JP5368381B2 (ja) | 有機発光表示装置及びその製造方法 | |
KR101073561B1 (ko) | 유기전계발광소자 및 그의 제조 방법 | |
US8563978B2 (en) | Display device and method for manufacturing the same | |
US9000437B2 (en) | Thin-film semiconductor device including a multi-layer channel layer, and method of manufacturing the same | |
JP4943534B2 (ja) | 有機発光表示装置及びその製造方法 | |
US20140097455A1 (en) | Semiconductor device and display apparatus | |
JP5443588B2 (ja) | 発光表示装置及びその製造方法 | |
TW201517279A (zh) | 薄膜電晶體陣列基板 | |
JP5820402B2 (ja) | 薄膜トランジスタ装置及び薄膜トランジスタ装置の製造方法 | |
US8664662B2 (en) | Thin-film transistor array device, EL display panel, EL display device, thin-film transistor array device manufacturing method, EL display panel manufacturing method | |
JP2008091599A (ja) | 薄膜トランジスタおよびその製造方法ならびに表示装置 | |
JP2003223120A (ja) | 半導体表示装置 | |
US9142405B2 (en) | Thin film transistor, method of manufacturing active layers of the thin film transistor, and display device | |
JP2005340822A (ja) | 薄膜トランジスタ基板、薄膜トランジスタ基板の製造方法、および平板表示装置 | |
KR101843191B1 (ko) | 유기발광 다이오드 표시장치 및 그의 제조방법 | |
JP2006330719A (ja) | 有機発光ディスプレイ及びその製造方法 | |
WO2012172714A1 (ja) | 表示装置、表示装置に用いられる薄膜トランジスタ、及び薄膜トランジスタの製造方法 | |
KR100599727B1 (ko) | 유기 el 발광셀의 커패시터 및 그 제조 방법 | |
US20140051218A1 (en) | Thin film semiconductor device comprising a polycrystalline semiconductor layer formed on an insulation layer having different thickness | |
JP2006301629A (ja) | 単結晶シリコン薄膜トランジスタの有機発光ディスプレイ及びその製造方法 | |
JP2009289874A (ja) | 薄膜トランジスタおよび表示装置 | |
WO2013008360A1 (ja) | 表示装置、表示装置に用いられる薄膜トランジスタ、及び薄膜トランジスタの製造方法 | |
JP5687448B2 (ja) | 薄膜トランジスタ及びこれを用いた表示装置、並びに、薄膜トランジスタの製造方法 | |
TWI459566B (zh) | 薄膜電晶體、具有其之顯示裝置及製造薄膜電晶體與顯示裝置之方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201280001671.9 Country of ref document: CN |
|
ENP | Entry into the national phase |
Ref document number: 2012544969 Country of ref document: JP Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 20127031830 Country of ref document: KR Kind code of ref document: A |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12800403 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 12800403 Country of ref document: EP Kind code of ref document: A1 |