WO2004086487A1 - 半導体装置およびその作製方法 - Google Patents
半導体装置およびその作製方法 Download PDFInfo
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- WO2004086487A1 WO2004086487A1 PCT/JP2004/003715 JP2004003715W WO2004086487A1 WO 2004086487 A1 WO2004086487 A1 WO 2004086487A1 JP 2004003715 W JP2004003715 W JP 2004003715W WO 2004086487 A1 WO2004086487 A1 WO 2004086487A1
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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
- H10D86/0223—Manufacture or treatment of multiple TFTs comprising manufacture, treatment or patterning of TFT semiconductor bodies comprising crystallisation of amorphous, microcrystalline or polycrystalline semiconductor materials
- H10D86/0229—Manufacture or treatment of multiple TFTs comprising manufacture, treatment or patterning of TFT semiconductor bodies comprising crystallisation of amorphous, microcrystalline or polycrystalline semiconductor materials characterised by control of the annealing or irradiation parameters
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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
- H10D86/0241—Manufacture or treatment of multiple TFTs using liquid deposition, e.g. printing
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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
- H10D86/40—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
- H10D86/441—Interconnections, e.g. scanning lines
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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
- H10D86/40—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
- H10D86/451—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 characterised by the compositions or shapes of the interlayer dielectrics
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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
- H10D86/40—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
- 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
- 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
Definitions
- the present invention relates to a method for manufacturing a semiconductor device, and more particularly to a semiconductor device having a circuit composed of active matrix field effect thin film transistors (hereinafter, a thin film transistor is referred to as a TFT) on a substrate having an insulating surface, and a method for manufacturing the same.
- a semiconductor device having a circuit composed of active matrix field effect thin film transistors (hereinafter, a thin film transistor is referred to as a TFT) on a substrate having an insulating surface, and a method for manufacturing the same.
- TFT active matrix field effect thin film transistor
- the reason why the manufacturing process cannot be further simplified lies in the TFT structure. That is, since the wiring has a multilayer structure so that the wiring crosses three-dimensionally, it is necessary to form a contact hole, which increases the number of steps.
- an island-shaped semiconductor layer 702 is formed on a glass substrate 701.
- an amorphous silicon film formed by a CVD method is crystallized by a laser annealing method, a thermal annealing method, an RTA method, etc., and a predetermined region serving as an active layer is covered with a resist mask, and dry etching is performed.
- An island-shaped semiconductor layer is formed by removing the polycrystalline silicon film that is not covered by the resist using the apparatus.
- an insulating film and a conductive layer are sequentially formed on the entire surface of the substrate by a plasma CVD method, a sputtering method, etc., a resist mask is provided in a predetermined region, and the insulating film and the conductive film are etched.
- a gate insulating film 703, a gate electrode 704, and a gate wiring 705 are formed.
- a predetermined region is doped with an impurity atom imparting N-type and an impurity atom imparting P-type to form source / drain regions of an N-channel TFT and a P-channel TFT. I do.
- a resist mask is used to separate into predetermined regions.
- thermal annealing, RTA, laser annealing, etc. are used to electrically activate the doped impurity atoms.
- This activation treatment may be performed after the formation of the interlayer insulating film.
- hydrogenation is usually performed with the silicon nitride film and silicon nitride oxide film formed.
- an interlayer insulating film 706 is formed.
- a resist mask is provided in a predetermined region, and etching is performed to form contact holes in the interlayer insulating film on the source / drain regions and on the gate wiring.
- the etching process is performed by a dry etching method or an etching method.
- a wiring metal is formed by using a sputtering method, a resist mask is provided in a predetermined region, and etching is performed, thereby forming a source wiring 707. After forming the source wiring, each wiring is electrically connected to the source * drain region and the gate wiring via the contact hole.
- the manufacturing steps for TFT fabrication are numerous, but they are also essential processes that cannot be omitted.
- a TFT using amorphous Si used in a large-sized liquid crystal display device generally employs an inverted-suga type structure and a forward stagger type structure.
- a problem similar to a TFT using a polycrystalline silicon film arises in that a TFT must be formed by a complicated manufacturing process using a TFT. Disclosure of the invention
- an object of the present invention is to find a method of manufacturing a TFT substrate at low cost. Since the problem is that the number of processes is large, we considered a method to greatly reduce the number of processes. In order to reduce the essential steps of TFT fabrication, it is necessary to review the TFT structure itself and reconstruct the TFT fabrication process. Therefore, the present invention proposes a novel TFT structure, proposes a new process for fabricating the new TFT structure, and greatly reduces the TFT substrate fabrication cost by greatly reducing the TFT fabrication process. Aim. Another object of the present invention is to reduce the number of masks used during the TFT fabrication process by reducing one step of photolithography.
- the reason for the increase in the number of TFT fabrication steps is that a gate line is placed below the interlayer insulating film and a source line is placed above the interlayer insulating film in order to three-dimensionally cross the gate wiring and the source wiring. It is to arrange.
- a gate line is placed below the interlayer insulating film and a source line is placed above the interlayer insulating film in order to three-dimensionally cross the gate wiring and the source wiring. It is to arrange.
- the island-shaped interlayer insulating film is formed only in a region where the source line and the gate line intersect.
- an island-shaped interlayer insulating film is also formed in a region where a storage capacitor is formed between the active layer and the wiring or between the gate line and the source line.
- the inter-insulating film has a structure that exists only at the intersection of the gate wiring and the source wiring and at the storage capacitor forming part. By using this new TFT structure, it is not necessary to form a contact hole in the source / drain region and a contact hole in the gate wiring.
- a method for forming an island-shaped interlayer insulating film there is a droplet discharging method.
- a liquid containing an insulating material may be dropped into a region where the gate wiring and the source wiring intersect or a region where a storage capacitor is formed using a droplet discharge method.
- a CVD method is used.
- a metal mask is opposed to a substrate, and an insulating film is formed only in a region where a gate wiring and a source wiring cross or a storage capacitor is formed.
- a gate wiring, a gate electrode, and a source wiring can be continuously formed.
- three heads for ejecting droplets shown in Fig. 2 are used, which are provided with solution ejection nozzles in a linear shape.
- Three droplet ejection heads are arranged to form one droplet ejection device.
- a gate electrode and a gate wiring are formed at predetermined positions by discharging a metal paste from the head A201 and scanning the head or the substrate.
- an insulating paste is discharged to a predetermined position, that is, a region where the gate wiring and the source wiring intersect and a region where the storage capacitor is formed.
- a metal paste is discharged to a predetermined position to form a source wiring, and at the same time, to connect a source / drain region.
- the discharge timing (scanning speed) of the paste is optimized considering the solidification time of the discharged paste.
- four heads that eject droplets are arranged, and a gate insulating film is also formed continuously. It is also possible.
- a plurality of types of nozzles may be arranged in one head instead of arranging a plurality of nozzles. It is also possible to perform processing individually using a plurality of droplet discharge devices. At this time, it is preferable to perform firing for each treatment.
- the gate wiring and the source wiring are formed on a substrate, and are arranged on the same plane, and in a region where the gate wiring and the source wiring intersect, the gate wiring and the source wiring are insulated. It is characterized by crossing through a membrane.
- the gate wiring and the source wiring may intersect via an island-shaped insulating layer.
- an island-shaped insulating layer may be disposed over the gate wiring, and a source wiring may be disposed above the island-shaped insulating layer, or an island-shaped insulating layer may be disposed over the source wiring. May be arranged, and a gate wiring may be arranged above the island-shaped insulating layer. Also, the source region and the source wiring can be connected on the same plane without passing through the contact hole.
- the semiconductor device of the present invention may have a capacitance using the island-shaped insulator layer as a dielectric.
- the thin film transistor of the semiconductor device includes a semiconductor film including a channel formation region, and the semiconductor film includes a microcrystalline semiconductor.
- a microcrystalline semiconductor is a film containing a semiconductor having an intermediate structure between an amorphous structure and a crystalline structure (including a single crystal and a polycrystal).
- This microcrystalline semiconductor is a semiconductor having a third state which is stable in terms of free energy, is crystalline having a short-range order and lattice distortion, and has a particle size of 0.5 to 20 nm. Can be dispersed and present in a non-single-crystal semiconductor.
- the microcrystalline semiconductor has a Raman spectrum shifted to a lower frequency side than 520 cm- 1 and is considered to be derived from the Si crystal lattice by X-ray diffraction (1 1 1), ( A diffraction peak of 220) is observed. It also contains at least 1 atomic% of hydrogen or halogen as a neutralizing agent for dangling bonds.
- a semiconductor is referred to as a microcrystalline semiconductor (SAS) for convenience.
- SAS microcrystalline semiconductor
- SAS microcrystalline semiconductor
- a rare gas element such as helium, argon, krypton, or neon to further promote lattice distortion, a good microcrystalline semiconductor with improved stability can be obtained.
- an organic material can be used as the semiconductor film.
- an organic molecular crystal or an organic polymer compound material may be used.
- Specific organic molecular crystals include polycyclic aromatic compounds, conjugated double bond compounds, carotene, macrocyclic compounds or their complexes, phthalocyanines, electrotransfer complexes, tetrathiofulvalene: TCNQ complexes, free radicals, diphene Nilpiclihydrazyl, dyes or proteins.
- Specific examples of organic polymer compound materials include polymers such as T-conjugated polymers, CT complexes, polyvinylpyridine, iodine, and phthalocyanine metal complexes.
- T-conjugated polymers whose skeleton is composed of conjugated double bonds, such as polyacetylene, polyaniline, It is preferable to use polypyrrole, polychenylene, a polythiophene derivative, poly (3-alkylthiophene), a polyparaphenylene derivative, or a polyparaphenylenevinylene derivative.
- the thin film transistor may be any of an inverted staggered thin film transistor and a forward and backward staggered thin film transistor.
- a gate wiring is formed, an island-shaped insulating layer is formed selectively over the gate wiring, a source wiring is formed on the same plane as the gate wiring, and the gate wiring and the source are formed. In a region where wirings intersect, a gate wiring and a source wiring are formed to intersect with an insulating layer interposed therebetween. Further, as another manufacturing method, in the above structure, a source wiring is formed first, and a gate wiring is formed over a source wiring through an insulating film in an intersecting region.
- the wiring, the insulating layer, the resist, or the like can be formed by a droplet discharging method.
- the droplet discharging method refers to a method in which a predetermined pattern is formed by discharging a solution containing metal particles or a solution containing an insulating material, and includes an ink-jet method and the like in its category.
- a droplet discharging method is used for forming an insulating film and a resist
- a photolithography method is used for forming a wiring pattern. It is sufficient to use a photolithography method.
- the mask used in the power setting may be formed by a droplet discharging method.
- the formation of the gate wiring and the source wiring is not limited to the droplet discharging method, and any method may be used.
- a source wiring may be formed by a droplet discharge method after a gate wiring is patterned by photolithography, or a gate wiring may be formed by photolithography after a source wiring is formed by a droplet discharge method. It may be formed by one.
- a wiring may be formed by using a laser drawing apparatus. Specifically, a photosensitive material is formed by applying by spin coating or discharging droplets, and is developed by irradiating a laser beam to the formed photosensitive material to form a mask pattern. Thereafter, wiring is formed using the mask pattern as a mask.
- the photosensitive material may be either a negative type or a positive type. In the above method, not only the formation of the wiring but also the pattern of the semiconductor film and the insulating film may be formed by the same method.
- the configuration of the present invention can be suitably applied in an atmosphere near the atmospheric pressure.
- the term “under atmospheric pressure” refers to a range of 600 to 16000 Pa, but is not necessarily limited to this value, and includes a low positive pressure state due to gas flow or the like.
- the above-described structure of the present invention can be used for a method for manufacturing a semiconductor device and a display device.
- a semiconductor device in this specification refers to any device that functions by utilizing semiconductor characteristics.
- a liquid crystal display device provided with an image display region and a driving circuit for displaying images on the same substrate.
- the present invention can be suitably used for an electro-optical device represented by an EL display device and an electronic apparatus equipped with the electro-optical device.
- the semiconductor device includes the electro-optical device and the electro-optical device.
- the electronic devices to be mounted are included in the category.
- the process can be greatly simplified. Further, a series of steps for forming a contact hole and making an electrical connection is not required.
- the reduction in the number of processes reduces material costs and labor costs in TFT manufacturing, and lowers costs. The number of equipment is reduced, and the number of processes using vacuum is greatly reduced, so that capital investment is also reduced. In addition, the manufacturing time until the completion of TFT is greatly reduced.
- the size of the device can be easily increased, and the present invention can be suitably applied to the manufacture of a semiconductor device such as a display device using a large substrate. Also, since the number of processes is very small, the yield is improved.
- FIG. 1 is a diagram showing a TFT structure of the present invention.
- FIG. 2 is a diagram showing the configuration of an apparatus provided with a head for discharging a plurality of droplets.
- FIG. 3 is a diagram showing an example of a droplet discharge device used in carrying out the present invention.
- FIG. 4 is a diagram showing an example of a head for discharging droplets used in carrying out the present invention.
- FIG. 5 is a diagram showing an example of a head for discharging droplets used in carrying out the present invention.
- FIG. 6 is a diagram illustrating an example of an electronic device.
- FIG. 7 is a diagram showing a conventional TFT structure.
- FIG. 8 is a diagram showing a TFT structure of the present invention.
- FIG. 9 is a diagram showing a TFT structure of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION
- an island-shaped semiconductor layer 112 serving as an active layer is formed on a substrate 111.
- the substrate 111 is formed of various materials such as glass, quartz, semiconductor, plastic, plastic film, metal, glass epoxy resin, and ceramics.
- Substrates made of a flexible synthetic resin such as plastic generally have a lower heat-resistant temperature than substrates made of glass, metal, etc. It can be used as long as it can withstand the processing temperature. Further, the surface of the substrate 111 may be flattened by polishing such as a CMP method.
- the island-shaped semiconductor layers 112 are formed in the following procedure. First, a base film such as a silicon oxide film or a silicon nitride film is formed on a substrate 111, and a semiconductor layer having an amorphous structure is formed thereon.
- the semiconductor layer has a thickness of 20 to 150 nm, preferably 30 to 80 nm, using a plasma CVD method or a sputtering method.
- As the semiconductor layer having an amorphous structure there are an amorphous semiconductor film and a microcrystalline semiconductor film (SAS), and even when a compound semiconductor film having an amorphous structure such as an amorphous silicon germanium film is applied. good.
- An amorphous semiconductor can be obtained by glow discharge decomposition of a silicide gas.
- a silicide gas includes S i H 4 S i 2 H 6. This silicide gas may be used after being diluted with hydrogen, hydrogen and helium.
- a microcrystalline semiconductor can also be obtained by glow discharge decomposition of a silicide gas.
- a silicide gas As a typical silicide gas, a S i H 4, S i 2 H 6 Besides, S i H 2 C l 2 , S i HC 1 3 S i C 1 4, S i F 4 , etc. Can be used.
- the formation of a microcrystalline semiconductor can be achieved by diluting this silicide gas with hydrogen or a gas obtained by adding one or more kinds of rare gas elements selected from helium, argon, krypton, and neon to hydrogen. It can be easy. It is preferable to dilute the silicide gas at a dilution ratio of 2 to 1000 times.
- TFTs using SAS as the first semiconductor film can have a mobility of 1 to L Ocm 2 / Vsec or higher.
- the reaction generation of the film by glow discharge decomposition can be performed under reduced pressure or atmospheric pressure.
- the pressure may be approximately in the range of 0.1 lPa to 133Pa.
- the power for forming a glow discharge may be a high frequency power of 1 MHz to 120 MHz, preferably 13 MHz to 6 OMHz.
- the pressure is in the range of approximately 0.1 lPa to 133 Pa, and the power supply frequency is 1 MHz to 120 MHz, preferably 13 MHz to 60 MHz.
- the substrate heating temperature may be 300 ° C. or less, preferably 100 to 250.
- the impurity element in the film it is desirable that impurities of atmospheric components such as oxygen, nitrogen, and carbon be 1 ⁇ 10 2 Q at oms cm 3 or less, and particularly, the oxygen concentration is 5 ⁇ 10 19 at om s Zcm. 3 or less, preferably lxi 0 19 atoms Z cm 3 or less.
- the semiconductor layer having an amorphous structure is crystallized by a laser annealing method, a thermal annealing method, a rapid thermal annealing method (RTA method), or the like. Crystallization may be performed by a crystallization method using a metal element Ni in accordance with the technique disclosed in JP-A-7-130652.
- the crystalline semiconductor layer after crystallization is selectively etched using a resist mask to form an island-like semiconductor layer 112 in a predetermined region.
- a photolithography process is usually used, but a droplet discharge method may be used. In this case, an island-like semiconductor layer close to an ellipse is formed.
- the droplet discharge method it is not necessary to use a photosensitive material as a mask pattern material, and the mask pattern material can be easily removed. You only need to select a material that can be removed.
- steps such as exposure and development can be omitted.
- the materials used are reduced to the minimum required, which improves the efficiency of material use.
- B boron
- B boron
- an impurity element imparting N-type such as P (phosphorus) may be added, or the threshold of a P-channel TFT may be controlled.
- a mass injection method, an ion shower doping method, or a plasma doping method is used for mass separation.
- the impurity element imparting N-type is doped into a predetermined region to form a source / drain region of an N-channel TFT (FIG. 8A).
- source / drain regions of a P-channel TFT doping is performed with an impurity element imparting P-type conductivity.
- the doping region is separated by providing a mask 119 over the entire island-shaped semiconductor region or the channel formation region by a photolithography method or a droplet discharging method.
- the impurity concentration of the source / drain region is set to 1 ⁇ 10 20 to 5 ⁇ 10 21 / cm 3 .
- the doping mask 119 is removed by an assing method, a dry etching method, a wet etching method, etc., and then the doped impurity element is activated by a laser annealing method, a furnace method, or an RTA method.
- the sheet resistance of the source / drain region is set to 1 OkQ / port or less. Activation can also be performed after gate lines and wiring are formed. LDD area divided by gate-overlap area by using doping and doping mask processes twice You can also.
- the heads that discharge multiple types of droplets are arranged and scanned to form the gate insulating film 113, the gate electrode 114, the gate wiring 115, and the insulating layer 116.
- a continuous formation of the source wiring 117 is performed. This continuous formation is performed using a droplet discharge device having the head configuration shown in FIG. First, an insulating solution is guided to the nozzle in the front row in the substrate scanning direction of the droplet discharge device, and the liquid is discharged according to a predetermined electric signal to form a gate insulating film 113 (see FIG. 8 (B)).
- This insulating film must be formed so as to cover the entire surface of the channel region, but leave a part of the source / drain region bare.
- a solution containing metal particles is introduced into the nozzles in the second row, and is discharged to predetermined positions to form gate electrodes 114 and gate wirings 115 (FIG. 8 (C)).
- the solution containing metal particles it is preferable to use independently dispersed nanoparticles (particle diameter: 2 to 10 nm) that are dispersed without agglomeration in a solvent.
- an insulating solution is introduced into the nozzles in the third row, and is discharged in a drop shape only in the area where the gate wiring 115 intersects with the source wiring 117 and in the storage capacitor forming part.
- An edge layer 1 16 is formed (FIG. 8D).
- a solution containing metal particles (preferably independently dispersed nanoparticles of gold, silver, copper, etc.) is introduced into the nozzles in the fourth row, and is discharged at predetermined positions to form source wirings 1 17 ( Figure 8 (E)).
- the source region and the source wiring 117 are electrically connected directly without passing through the contact hole.
- the gate wiring 1 15 and the source wiring 1 17 are electrically connected via the insulating layer 116. They will cross three-dimensionally without being connected.
- a conductive material having one or more metals or metal compounds such as Ag, Au, Cu, and Pd is used. If a dispersant can suppress aggregation and disperse in a solution, use a conductive material having one or more metals or metal compounds such as Cr, Mo, Ti, Ta, W, and A1. It is also possible.
- a gate electrode in which a plurality of conductive films is stacked can be formed by performing film formation of a conductive material a plurality of times by a droplet discharge method or various printing methods.
- the composition discharged from the discharge port is preferably a material in which one of Au, Ag, and Cu is dissolved or dispersed in a solvent, and more preferably.
- Use low-resistance Ag Cu when Ag and C11 are used, a barrier film may be provided together to prevent impurities.
- a silicon nitride film or nickel boron (NiB) can be used as the paria film.
- wiring can also be formed by discharging a solution containing a metal element such as a metal alkoxide mainly used in a sol-gel method or the like in addition to the metal particles.
- the diameter of the nozzle used for discharging droplets is set to 0.1 to 50 m (preferably 0.6 to 26), and the discharge amount of the composition discharged from the nozzle is 0.001 p1 to 1.
- Set to 50 p 1 (preferably 0.001 to 40 pl).
- This discharge amount increases in proportion to the diameter of the nozzle.
- the distance between the object to be processed and the nozzle orifice is preferably as short as possible in order to drop the ink onto a desired portion, and is preferably set to about 0.1 to 2 mm. Even if the nozzle diameter is not changed, the discharge can be performed by changing the pulse voltage applied to the piezoelectric element. The amount can also be controlled. It is desirable to set these discharge conditions so that the line width is about 10 m or less.
- a heat treatment is performed at a temperature of 150 ° to 400 ° C. for 10 to 60 minutes, thereby firing the electrodes and the wiring tar. At this time, if a heat treatment is performed in a state where a thin film containing a large amount of nitrogen is formed, hydrogenation can be performed at the same time.
- the drain wiring is connected to pixel electrodes corresponding to various elements such as a light emitting element or a liquid crystal element, and a protective film is formed on the entire surface to complete the TFT substrate.
- This protective film may also be formed using a droplet discharge method.
- Polyimide, acrylic, polyamide, polyimide amide, BCB (benzocyclobutene), etc. with a thickness of 1.0 to 1.5 can be used for the protective film.
- an active matrix substrate having a driver circuit and a pixel portion can be manufactured over the same substrate.
- the substrate size is 600 mm ⁇ 720 mm, 68 OmmX 880 mm, 100 OmmX 1200 mm, 110 OmmX 1250 mm, 115 Use a large area substrate such as OmmX 1300 mm, 150 OmmX 1800 mm, 180 OmmX 2000 mm, 2000 mmX 2100 mm, 2200 mmX 2600 mm, or 260 OmmX 3100 mm.
- Substrates that can be used include ball borosilicate glass and alumino, such as Corning # 7059 glass and # 1737 glass.
- a glass substrate such as borosilicate glass can be used.
- various light-transmitting substrates such as quartz, semiconductor, plastic, plastic film, metal, glass epoxy resin, and ceramic can be used.
- the droplet discharge device shown in FIG. 3 has a droplet discharge means 310 in the device, and discharges a solution to obtain a desired pattern on the substrate 302.
- the substrate 302 can be applied not only to a glass substrate having a desired size, but also to an object to be processed such as a resin substrate represented by a plastic substrate or a semiconductor wafer represented by silicon. .
- the substrate 302 is carried into the housing 301 from the carry-in port 304, and the substrate after the droplet discharge processing is carried out from the carry-out port 305.
- the substrate 302 is mounted on the carrier 303, and the carrier 303 is a rail connecting the entrance and the exit 310a, 310b. Move up.
- the support portions 300 a and 307 b of the droplet discharge means support the droplet discharge means 310 for discharging the solution, and the droplet discharge means 300 is provided at an arbitrary position in the XY plane. This is the mechanism that moves 6.
- the support portion 307 a of the droplet discharge means moves in the X direction parallel to the carrier 303, and the support portion 307 of the droplet discharge means fixed to the support portion 307 a of the solution ejection means.
- the droplet discharging means 303 mounted on 7b moves in the Y direction perpendicular to the X direction.
- the support of the droplet discharge means 300 a and the droplet discharge means 303 are moved to the initial position when the substrate is loaded or unloaded, so that the droplet discharge processing can be performed efficiently. it can.
- the droplet discharging process starts when the substrate 302 reaches a predetermined position where the droplet discharging means 303 waits due to the movement of the carrier table 303.
- the droplet discharge processing includes the relative movement of the support portion 307 a of the droplet discharge device, the droplet discharge device 306 and the substrate 302, and the liquid supported by the support portion of the droplet discharge device. This is achieved by a combination of droplet ejection from the droplet ejection means 306.
- a desired pattern is formed on the substrate 302. Can be drawn.
- the droplet discharge processing requires a high degree of accuracy, the movement of the carrier is stopped during the droplet discharge, and the support section 307 a of the droplet discharge means and the droplet discharge means with high controllability are controlled. It is desirable to scan only 30 b.
- the scanning in the X-Y directions of the droplet discharge means 303 and the support portion 307a of the droplet discharge means is not limited to only one direction, and the liquid can be reciprocated or reciprocated repeatedly. Drop ejection processing may be performed.
- the solution is supplied to the inside of the housing from a solution supply unit 309 installed outside the housing 301, and then the droplets are discharged through the support portions 307a and 307b of the droplet discharging means.
- the liquid is supplied to the liquid chamber inside the means 360.
- This solution supply is controlled by the control means 308 provided outside the housing 301, but may be controlled by the control means incorporated in the support portion 307a of the droplet discharge means inside the housing. good.
- the movement of the carrier and the support of the droplet discharge means is controlled by the control means 308 provided outside the housing 301 in the same manner.
- a sensor for aligning with the substrate or the pattern on the substrate, a gas introducing means to the housing, an exhaust means inside the housing, a means for heating the substrate, Means for irradiating the substrate with light, as well as means for measuring various physical values such as temperature and pressure may be provided as necessary.
- These means can also be controlled collectively by the control means 308 provided outside the housing 301. Further, if the control means 308 is connected to a production management system or the like by a LAN cable, a wireless LAN, an optical fiber, or the like, the process can be uniformly controlled from the outside, leading to an improvement in productivity.
- FIG. 4 shows a cross section parallel to the Y direction of the droplet discharging means 310 of FIG.
- the solution supplied from the outside to the inside of the droplet discharge means 303 passes through the liquid chamber flow path 402 and is stored in the preliminary liquid chamber 403, and then the nozzle 409 for discharging the solution.
- the nozzle portion has a fluid resistance portion 404 provided for loading an appropriate solution into the nozzle, a pressurizing chamber 405 for pressurizing the solution and discharging the solution outside the nozzle, and a droplet discharge port 4. 0 7
- a so-called thermal droplet discharge method is used in which a heating element generates heat to generate bubbles and push out the solution. Is also good.
- the piezoelectric element 406 is replaced with a heating element.
- the solution, the liquid chamber flow path 402, the preliminary liquid chamber 403, the fluid resistance section 404, and the pressurizing chamber 405 are further discharged.
- the wettability with the outlet 407 is important. Therefore, a carbon film, a resin film, or the like for adjusting wettability with a material may be formed in each flow path.
- the droplet discharge method includes a so-called sequential method in which a solution is continuously discharged to form a continuous linear pattern, and a so-called on-demand method in which a solution is discharged in a dot form.
- the demand method has been described, it is also possible to use a droplet discharge means of a sequential method.
- FIG. 5A schematically show the bottom of the droplet discharging means in FIG.
- FIG. 5A shows a basic arrangement in which one droplet discharge port 502 is provided at the bottom 501 of the droplet discharge means.
- FIG. 5A shows a basic arrangement in which one droplet discharge port 502 is provided at the bottom 501 of the droplet discharge means.
- FIG. 5 (B) shows a so-called class-like arrangement in which the number of the droplet discharge ports 502 of the droplet discharge means bottom 501 is increased to three so as to form a triangle.
- the droplet discharge ports are arranged vertically. In this arrangement, after the droplet is discharged from the upper droplet discharge port 502, the same solution is discharged from the lower droplet discharge port 502 to the same place with a time difference, so that the liquid is already discharged. Before the solution on the substrate is dried or solidified, the same solution can be further thickened. Also, the upper droplet ejection port If clogging occurs due to a solution or the like, the lower droplet discharge port can be made to function as a spare.
- the present invention is not limited to this.
- By arranging the droplet discharging means linearly in the Y direction It is also possible to discharge the solution. In this case, it is not necessary to scan the droplet discharging means in the Y direction, and the solution can be discharged over the entire surface by scanning in the X direction.
- the droplet discharge means By selectively forming a film by the droplet discharge means, the amount of the film (resist, metal, semiconductor film, organic film, etc.), which was mostly wasted in the past, is reduced, thereby reducing the manufacturing cost. enable.
- a composition in which fine metal particles are dispersed in an organic solvent is used to form a wiring pattern.
- Fine metal particles having an average particle diameter of 1 to 50 nm, preferably 3 to 7 nm are used. Typically, they are silver or gold fine particles, the surface of which is coated with a dispersant such as amine, alcohol, or thiol.
- the organic solvent is a phenolic resin, an epoxy resin, or the like, and a thermosetting or photocurable one is used. The viscosity of the composition may be adjusted by adding a thixotropic agent or a diluting solvent.
- An appropriate amount of the composition discharged onto the surface to be formed by the droplet discharging means hardens the organic solvent by heat treatment or light irradiation treatment. Due to the volume shrinkage caused by the curing of the organic solvent, the metal fine particles come into contact with each other and promote fusion, fusion or aggregation. That is, metal fine particles having an average particle size of 1 to 50] 111, preferably 3 to 7 nm Fused, fused or aggregated wiring is formed. In this way, by forming a state in which the metal fine particles come into surface contact with each other by fusion, fusion, or aggregation, it is possible to realize a reduction in the resistance of the wiring.
- a wiring pattern by forming a wiring pattern using such a composition, it is easy to form a wiring pattern having a line width of about 1 to 10 m.
- an insulating pattern can be similarly formed.
- a substrate 900 for forming a TFT and a light emitting element is formed.
- the substrate 900 for example, a glass substrate of barium borosilicate glass, alumino borosilicate glass, or the like, a quartz substrate, a ceramic substrate, or the like can be used.
- a metal substrate or a semiconductor substrate in which an insulating film is formed over a surface may be used.
- a substrate made of a synthetic resin having flexibility such as plastic generally has a lower heat resistance than the above substrate, but any substrate that can withstand the processing temperature in the manufacturing process can be used. is there.
- the surface of the substrate 900 may be flattened by polishing such as a CMP method.
- a method for increasing the adhesion for example, a method of attaching a metal or a metal compound capable of increasing the adhesion by a catalytic action to the surface of the substrate 900, or an organic-based material having a high adhesion to a formed conductive film or insulating film. Examples include a method of attaching an insulating film, a metal or a metal compound to the substrate 900, and a method of performing a plasma treatment on the surface of the substrate 900 under atmospheric pressure or reduced pressure to perform surface modification.
- titanium, titanium oxide, and Sc, Ti, V, Cr, ⁇ , Fe, and C which are 3d transition metals, are used as metals having high adhesion to the conductive film or the insulating film. o, Ni, Cu, Zn, and the like.
- the metal compound for example, an insulating film containing a Si—O—Si bond formed using a polyimide or a siloxane-based material as a starting material (hereinafter, referred to as a siloxane-based insulating film) and the like can be given.
- the siloxane-based insulating film may have at least one of fluorine, an alkyl group, and an aromatic hydrocarbon in addition to hydrogen for substitution.
- the sheet resistance is controlled so that the normal operation of the semiconductor element is not hindered.
- the average thickness of the conductive metal or metal compound is controlled to be, for example, 1 to 10 nm, or the metal or metal compound is partially or entirely oxidized. Insulation may be used.
- the adhering metal or metal compound may be selectively removed by etching in a region other than the region where the adhesion is desired to be improved.
- a metal or a metal compound may be selectively deposited only on a specific region using a droplet discharging method, a printing method, a sol-gel method, or the like.
- the metal or metal compound is
- the surface of the substrate 900 need not be a completely continuous film, but may be in a state of being dispersed to some extent.
- depositing the photocatalytic such Z n O or T i 0 2 which can enhance the adhesion by the photocatalytic reaction on the surface of the substrate 900.
- depositing a compound or compounds of the T i of Zn on the surface of the substrate 900, or is oxidized By using a sol-gel method or the like, Zn ⁇ or Ti 0 2 can be attached to the surface of the substrate 900 as a result.
- a gate electrode 901 and a wiring 902 are formed by a droplet discharging method or various printing methods on the surface of the substrate 900 which has been subjected to pretreatment for improving adhesion.
- a conductive material having one or more metals or metal compounds such as Ag, Au, Cu, and Pd is used. If the dispersant can suppress aggregation and disperse in a solution, a conductive material having one or more metals, such as Cr, Mo, Ti, Ta, W, and A1, may be used. It is also possible to use.
- a gate electrode in which a plurality of conductive films is stacked can be formed by performing film formation of a conductive material by a droplet discharge method or various printing methods a plurality of times.
- the composition to be discharged from the discharge port is preferably a material obtained by dissolving or dispersing any of Au, Ag, and Cu in a solvent in consideration of the specific resistance value. It is good to use low resistance silver and copper.
- a barrier film may be provided together to prevent impurities.
- a silicon nitride film or nickel boron (NiB) can be used.
- insulating films 903 and 904 are formed so as to cover the gate electrode 901 and the wiring 902 (FIG. 9A).
- the insulating films 903 and 904 can be formed by selectively discharging an insulating solution.
- the method for forming the insulating film is not limited to this, and the insulating film may be formed by a plasma CVD method, a sputtering method, or the like. In addition, a single-layer insulating film may be used, or a plurality of insulating films may be stacked.
- the first semiconductor film 905 can be formed of an amorphous (amorphous) semiconductor or a semi-amorphous semiconductor (SAS). Further, a polycrystalline semiconductor film may be used. In this embodiment mode, a semi-amorphous semiconductor is used as the first semiconductor film 905.
- a semi-amorphous semiconductor has higher crystallinity than an amorphous semiconductor and thus has high mobility. Unlike a polycrystalline semiconductor, a semi-amorphous semiconductor can be formed without increasing the number of steps for crystallization.
- a protective film 906 is formed over the first semiconductor film 905 so as to overlap with a portion to be a channel formation region in the first semiconductor film 905.
- the protective film 906 may be formed by a droplet discharge method, or may be formed by a CVD method, a sputtering method, or the like.
- an inorganic insulating film of silicon oxide, silicon nitride, silicon nitride oxide, or the like, a siloxane-based insulating film, or the like can be used. Alternatively, these films may be stacked and used as the protective film 906.
- a silicon nitride film formed by a plasma CVD method and a siloxane-based insulating film formed by a droplet discharge method are stacked and used as a protective film 906.
- the silicon nitride patterning is performed by masking the siloxane-based insulating film formed by the droplet discharging method. Can be used.
- a second semiconductor film 907 is formed so as to cover the first semiconductor film 905 (FIG. 9C).
- An impurity imparting one conductivity type is added to the second semiconductor film 907.
- an impurity gas such as B 2 H 6 or BF 3 is preferably mixed with a silicide gas as an impurity imparting p-type conductivity.
- the concentration of the boron is preferably set to 1 ⁇ 10 14 to 6 ⁇ 10 16 atoms / cm 3 .
- an impurity imparting N-type conductivity for example, phosphorus may be added to the second semiconductor film 907.
- an impurity gas such as PH 3 may be added to a silicide gas to form the second semiconductor film 907.
- the second semiconductor film 907 having one conductivity type can be formed using a semi-amorphous semiconductor or an amorphous semiconductor similarly to the first semiconductor film 905.
- the first semiconductor film 905 and the second semiconductor film 907 are patterned using a resist 908 formed by a droplet discharge method as a mask (FIG. 9D).
- 909 corresponds to the first semiconductor film after patterning
- 910 corresponds to the second semiconductor film after patterning.
- a source wiring 911 and a drain wiring 912 are formed by a droplet discharge method. Then, by using the source wiring 911 and the drain wiring 912 as a mask and further patterning the second semiconductor film 910, the second semiconductor functioning as a source region or a drain region is formed. Membrane 91 3, 9 14 Is formed. Thereafter, the drain wiring is connected to pixel electrodes corresponding to various elements such as a light emitting element or a liquid crystal element, and a protective film is formed on the entire surface to complete the TFT substrate.
- a scan line driver circuit can be formed over the same substrate as the pixel portion.
- a pixel portion may be formed using TFT using an amorphous semiconductor, and a driver circuit separately formed may be attached to a substrate on which the pixel portion is formed.
- D VD digital versatile discs
- FIG. 6 shows specific examples of these electronic devices.
- FIG. 6A illustrates a display device, which includes a housing 6001, a support base 6002, a display portion 6003, a part of speakers 6004, a video input terminal 6005, and the like.
- the present invention can be used for an electric circuit included in the display portion 6003. According to the present invention, the display device shown in FIG. 6A is completed.
- the display device contains all information such as for personal computers, for receiving 20-80 inch TV broadcasts, and for displaying advertisements.
- a display device for display is included.
- FIG. 6B shows a digital still camera, which includes a main body 610 1, a display section 6 102, an image receiving section 6 103, operation keys 61 04, an external connection port 6 105, and a shirt 6106.
- the present invention can be used for an electric circuit included in the display portion 6102. According to the present invention, a digital still camera shown in FIG. 6B is completed.
- FIG. 6C illustrates a laptop personal computer, which includes a main body 6201, a housing 6202, a display portion 6203, a keypad 6204, an external connection port 6205, a pointing mouse 6206, and the like.
- the present invention can be used for an electric circuit included in the display portion 6203. According to the present invention, a notebook personal computer shown in FIG. 6C is completed.
- FIG. 6D shows a mopile computer, which includes a main body 630 1, a display portion 630 2 switch 6303, operation keys 6304, an infrared port 6305, and the like.
- the present invention can be used for an electric circuit included in the display portion 6302. According to the present invention, the mobile computer shown in FIG. 6D is completed.
- FIG. 6 (E) shows a portable image reproducing device (specifically, a DVD reproducing device) provided with a recording medium, and includes a main body 640 1, a housing 6402, a display portion A 6403, a display portion B 6404, a recording medium ( DVD, etc.) Includes a reading unit 6405, operation keys 640 6, a speaker part 6407, and the like.
- the display portion A 6403 mainly displays image information
- the display portion B 6404 mainly displays character information.
- the present invention can be used for electric circuits forming the display portions A, B 6403, and 6404.
- the image reproducing device provided with the recording medium includes a home game machine and the like. Further, according to the present invention, the DVD reproducing apparatus shown in FIG. 6 (E) is completed.
- FIG. 6F shows a goggle-type display (head-mounted display), which includes a main body 6501, a display section 6502, and an arm section 6503.
- the present invention can be used for an electric circuit included in the display portion 6502. Further, according to the present invention, a goggle type display shown in FIG. 6 (F) is completed.
- Figure 6 (G) shows a video camera, with a main unit 6601, a display unit 6602, a housing 6603, an external connection port 6604, a remote control receiving unit 6605, and an image receiving unit 6.
- the present invention can be used for an electric circuit included in the display portion 6602. According to the present invention, a video camera shown in FIG. 6 (G) is completed.
- Figure 6 (H) shows a mobile phone, with a main body 6701, a housing 6702, a display section 6703, an audio input section 6704, an audio output section 6705, and an operation key. Includes 670, external connection port 670, antenna 670, etc.
- the present invention can be used for an electric circuit included in the display portion 6703.
- the display portion 6703 displays white characters on a black background, so that power consumption of the mobile phone can be suppressed.
- the mobile phone shown in FIG. 6 (H) is completed.
- the applicable range of the present invention is extremely wide, and the present invention can be used for electronic devices in all fields. Further, the electronic device shown here may use the semiconductor device having any configuration shown in the present invention.
Landscapes
- Thin Film Transistor (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Formation Of Insulating Films (AREA)
- Liquid Crystal (AREA)
- Electrodes Of Semiconductors (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004564054A JP4869601B2 (ja) | 2003-03-26 | 2004-03-19 | 半導体装置および半導体装置の作製方法 |
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| JP2003086425 | 2003-03-26 | ||
| JP2003-086425 | 2003-03-26 |
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| WO2004086487A1 true WO2004086487A1 (ja) | 2004-10-07 |
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| PCT/JP2004/003715 Ceased WO2004086487A1 (ja) | 2003-03-26 | 2004-03-19 | 半導体装置およびその作製方法 |
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| US (2) | US7554117B2 (ja) |
| JP (1) | JP4869601B2 (ja) |
| CN (1) | CN100552893C (ja) |
| TW (1) | TWI340471B (ja) |
| WO (1) | WO2004086487A1 (ja) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN1765009A (zh) | 2006-04-26 |
| US20090325376A1 (en) | 2009-12-31 |
| TWI340471B (en) | 2011-04-11 |
| JPWO2004086487A1 (ja) | 2006-06-29 |
| US7554117B2 (en) | 2009-06-30 |
| US20070181945A1 (en) | 2007-08-09 |
| CN100552893C (zh) | 2009-10-21 |
| JP4869601B2 (ja) | 2012-02-08 |
| TW200428667A (en) | 2004-12-16 |
| US7955910B2 (en) | 2011-06-07 |
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