WO2012008545A1 - 窒化アルミニウム結晶の製造方法 - Google Patents
窒化アルミニウム結晶の製造方法 Download PDFInfo
- Publication number
- WO2012008545A1 WO2012008545A1 PCT/JP2011/066146 JP2011066146W WO2012008545A1 WO 2012008545 A1 WO2012008545 A1 WO 2012008545A1 JP 2011066146 W JP2011066146 W JP 2011066146W WO 2012008545 A1 WO2012008545 A1 WO 2012008545A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- aluminum nitride
- aln
- crystal
- substrate
- sapphire
- Prior art date
Links
- 239000013078 crystal Substances 0.000 title claims abstract description 104
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 title claims abstract description 48
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 239000000758 substrate Substances 0.000 claims abstract description 72
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 229910052594 sapphire Inorganic materials 0.000 claims description 41
- 239000010980 sapphire Substances 0.000 claims description 41
- 150000004767 nitrides Chemical class 0.000 claims description 36
- 150000001875 compounds Chemical class 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 17
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 37
- 229910001873 dinitrogen Inorganic materials 0.000 abstract description 7
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 229910000838 Al alloy Inorganic materials 0.000 abstract 2
- 239000010408 film Substances 0.000 description 30
- 230000004907 flux Effects 0.000 description 27
- 239000007789 gas Substances 0.000 description 19
- 229910052782 aluminium Inorganic materials 0.000 description 16
- 229910052757 nitrogen Inorganic materials 0.000 description 15
- 229910052733 gallium Inorganic materials 0.000 description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 12
- 238000004943 liquid phase epitaxy Methods 0.000 description 12
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 10
- 230000008018 melting Effects 0.000 description 8
- 238000002844 melting Methods 0.000 description 8
- 239000007791 liquid phase Substances 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 238000004719 convergent beam electron diffraction Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 239000013598 vector Substances 0.000 description 5
- 229910002704 AlGaN Inorganic materials 0.000 description 4
- 238000000137 annealing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 238000005121 nitriding Methods 0.000 description 4
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- 238000002441 X-ray diffraction Methods 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 3
- 239000013081 microcrystal Substances 0.000 description 3
- 239000012299 nitrogen atmosphere Substances 0.000 description 3
- 238000010587 phase diagram Methods 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 229910002056 binary alloy Inorganic materials 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000002411 thermogravimetry Methods 0.000 description 2
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 235000015220 hamburgers Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000004678 hydrides Chemical class 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 125000002524 organometallic group Chemical group 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 238000000927 vapour-phase epitaxy Methods 0.000 description 1
- 238000001947 vapour-phase growth Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B19/00—Liquid-phase epitaxial-layer growth
- C30B19/12—Liquid-phase epitaxial-layer growth characterised by the substrate
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B9/00—Single-crystal growth from melt solutions using molten solvents
- C30B9/04—Single-crystal growth from melt solutions using molten solvents by cooling of the solution
- C30B9/06—Single-crystal growth from melt solutions using molten solvents by cooling of the solution using as solvent a component of the crystal composition
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B19/00—Liquid-phase epitaxial-layer growth
- C30B19/02—Liquid-phase epitaxial-layer growth using molten solvents, e.g. flux
- C30B19/04—Liquid-phase epitaxial-layer growth using molten solvents, e.g. flux the solvent being a component of the crystal composition
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
- C30B29/40—AIIIBV compounds wherein A is B, Al, Ga, In or Tl and B is N, P, As, Sb or Bi
- C30B29/403—AIII-nitrides
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B9/00—Single-crystal growth from melt solutions using molten solvents
- C30B9/04—Single-crystal growth from melt solutions using molten solvents by cooling of the solution
- C30B9/08—Single-crystal growth from melt solutions using molten solvents by cooling of the solution using other solvents
- C30B9/10—Metal solvents
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02367—Substrates
- H01L21/0237—Materials
- H01L21/0242—Crystalline insulating materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02436—Intermediate layers between substrates and deposited layers
- H01L21/02439—Materials
- H01L21/02455—Group 13/15 materials
- H01L21/02458—Nitrides
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02518—Deposited layers
- H01L21/02521—Materials
- H01L21/02538—Group 13/15 materials
- H01L21/0254—Nitrides
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02612—Formation types
- H01L21/02617—Deposition types
- H01L21/02623—Liquid deposition
- H01L21/02625—Liquid deposition using melted materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/005—Processes
- H01L33/0062—Processes for devices with an active region comprising only III-V compounds
- H01L33/0066—Processes for devices with an active region comprising only III-V compounds with a substrate not being a III-V compound
- H01L33/007—Processes for devices with an active region comprising only III-V compounds with a substrate not being a III-V compound comprising nitride compounds
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
Definitions
- the present invention relates to a method for producing an aluminum nitride crystal in which AlN is epitaxially grown by liquid phase growth (LPE).
- LPE liquid phase growth
- Ultraviolet light emitting devices are attracting widespread attention as next-generation light sources such as fluorescent lamp replacement, high-density DVD, biochemical laser, decomposition of pollutants by photocatalyst, He-Cd laser, and mercury lamp replacement.
- This ultraviolet light-emitting element is made of an AlGaN-based nitride semiconductor called a wide gap semiconductor, and is stacked on different substrates such as sapphire, 4H—SiC, and GaN as shown in Table 1.
- 4H—SiC and GaN have high lattice matching but are expensive. Further, 4H—SiC and GaN absorb ultraviolet rays having wavelengths of 380 nm and 365 nm or less, respectively.
- AlN has a lattice constant close to that of AlGaN and is transparent to the ultraviolet region of 200 nm. Therefore, it is possible to efficiently extract ultraviolet light to the outside without absorbing emitted ultraviolet light. That is, by using AlN single crystal as a substrate and quasi-homoepitaxial growth of an AlGaN-based light emitting device, an ultraviolet light emitting device with a low crystal defect density can be manufactured.
- Patent Document 1 discloses that in a liquid phase growth method of a group III nitride crystal, pressure is applied to increase the amount of nitrogen dissolved in the flux, and an alkali metal such as sodium is added to the flux.
- Patent Document 2 proposes a method for producing AlN microcrystals by injecting a gas containing nitrogen atoms into an Al melt.
- JP 2004-224600 A Japanese Patent Laid-Open No. 11-189498
- the present invention has been proposed in view of such a conventional situation, and provides an inexpensive and high-quality method for producing an aluminum nitride crystal.
- the present inventors have been able to grow AlN crystals at a low temperature by using a Ga—Al compound financial liquid as a flux in the liquid phase growth method, and take over the crystallinity of the substrate surface. And it discovered that the favorable AlN crystal
- a gas containing N atoms is introduced into a Ga—Al compound liquid, and an aluminum nitride crystal is epitaxially grown on a seed crystal substrate in the Ga—Al compound liquid. It is characterized by letting.
- the crystal substrate according to the present invention is characterized in that an Al-polar aluminum nitride crystal is epitaxially grown on a nitrogen-polar aluminum nitride film formed on a sapphire nitride substrate.
- a high-quality AlN crystal can be grown at a low temperature, and the manufacturing cost can be reduced.
- an AlN crystal having Al polarity can be grown on a sapphire nitride substrate having nitrogen polarity.
- MOCVD Metal Organic Chemical Vapor Deposition
- the growth conditions of the MOCVD method optimized for the Al polar substrates currently used are used in LED (Light Emitting Diode) and LD (Laser Diode) devices. Necessary multiple quantum well structures can be produced.
- FIG. 1 is a graph showing the temperature dependence of the weight change of GaN and GaN + Ga in a nitrogen atmosphere.
- FIG. 2 is a binary alloy phase diagram of Ga and Al.
- FIG. 3 is a diagram illustrating a configuration example of an AlN crystal manufacturing apparatus.
- FIG. 4 is a graph showing measurement results of X-ray diffraction.
- FIG. 5 is a SEM observation photograph showing a cross section of the seed substrate after epitaxial growth.
- FIG. 6A is a TEM observation photograph showing a cross section of the sapphire nitride layer and the LPE layer.
- FIG. 6B is a TEM observation photograph in which the interface between the sapphire nitride layer and the LPE layer is enlarged.
- FIG. 1 is a graph showing the temperature dependence of the weight change of GaN and GaN + Ga in a nitrogen atmosphere.
- FIG. 2 is a binary alloy phase diagram of Ga and Al.
- FIG. 3 is a diagram illustrating a configuration example of
- FIG. 8A is a schematic diagram showing a CBED pattern and a simulation pattern of an AlN layer obtained by a sapphire nitriding method.
- FIG. 8B is a schematic diagram showing a CBED pattern and a simulation pattern of an AlN layer grown by LPE (liquid phase epitaxy).
- FIG. 1 is a graph showing the temperature dependence of the weight change of GaN and GaN + Ga in a nitrogen atmosphere. Differential thermogravimetry was performed in an atmosphere of N 2 (manufactured by Taiyo Toyo Oxygen Co., Ltd., purity 99.99995 vol%). As the sample, GaN powder (manufactured by Showa Chemical Co., Ltd., purity 99 mass%) and GaN + Ga (manufactured by Niraco Co., Ltd., purity 99.9999 mass%) were used, and measurement was performed at a temperature increase rate of 1075 K to 5 K / min.
- FIG. 2 is a binary alloy phase diagram of Ga and Al (see H. Okamoto, “Desk Handbook:“ Phase Diagrams ”for“ Binary ”Alloys,“ Asm International (2000) ”p31). As can be seen from FIG. 2, by using a flux of a mixture of Ga and Al, the liquidus temperature of the flux falls below the melting point of Al (660 ° C.).
- the inventors of the present invention can grow AlN crystals at a low temperature by using a Ga—Al compound financial liquid as a flux in the liquid phase growth method, and take over the crystallinity of the substrate surface. It was found that good AlN crystals can be obtained.
- a gas containing N atoms is introduced into a Ga—Al compound liquid and nitrided on a seed crystal substrate in the Ga—Al compound liquid.
- Epitaxial growth of aluminum crystals Thereby, crystal growth of AlN at a low temperature is possible, and an expensive furnace equipped with special heat-resistant equipment is not required, so that the manufacturing cost can be reduced.
- FIG. 3 is a diagram showing a configuration example of an AlN crystal manufacturing apparatus.
- This AlN crystal manufacturing apparatus includes a gas introduction tube 1, a crucible 2, a heater 5 for heating the seed substrate 3 and the Ga—Al compound liquid 4 in the crucible 2, a gas discharge tube 6, and a thermocouple 7. Prepare.
- the gas introduction tube 1 is movable up and down, and the tip can be inserted into the Ga—Al compound liquid 4 in the crucible 2. That is, the Ga—Al compound financial liquid 4 can be bubbled with a nitrogen-containing gas.
- the crucible 2 has a high temperature resistance, and for example, a ceramic such as alumina or zirconia can be used.
- the seed substrate 3 is a lattice matching substrate having a small lattice mismatch rate with the AlN crystal.
- a sapphire nitride substrate, SiC substrate, GaN substrate or the like having an AlN thin film formed on the surface thereof is used.
- the sapphire nitride substrate can be obtained by a method disclosed in, for example, Japanese Patent Application Laid-Open Nos. 2005-104829, 2006-213586, and 2007-39292.
- the c-plane sapphire substrate is held for 1 hour at a nitrogen partial pressure of 0.9 atm / CO partial pressure of 0.1 atm, and then held at a nitrogen partial pressure of 1.0 atm for 5 hours, whereby the crystallinity of the AlN thin film is obtained. Therefore, an excellent sapphire nitride substrate can be obtained.
- This sapphire nitride substrate has a nitrogen polarity in which the AlN film on the surface is a c-axis oriented single crystal film and is terminated with nitrogen.
- the sapphire nitride substrate be annealed at a temperature of 900 ° C. or higher and 1500 ° C. or lower in advance.
- the Ga—Al compound financial liquid 4 a liquid in which the molar ratio of Ga to Al is in the range of 99: 1 to 1:99 can be used.
- the molar ratio of Ga to Al is preferably in the range of 98: 2 to 40:60, more preferably in the range of 98: 2 to 50:50. .
- N 2 , NH 3 or the like can be used as the nitrogen-containing gas, but N 2 is preferably used from the viewpoint of safety.
- the nitrogen partial pressure of the nitrogen-containing gas is usually 0.01 MPa or more and 1 MPa or less.
- the temperature rise is started in an atmosphere in which Ga and Al do not form a compound (for example, argon gas), and after reaching the melting point of Al, a nitrogen-containing gas is injected into the Ga—Al compound liquid 4. Then, the temperature of the Ga—Al compound liquid 4 in the crucible 2 is kept at 1000 ° C. or more and 1500 ° C. or less, and the seed substrate 3 is immersed in the Ga—Al compound liquid 4 to generate an AlN crystal on the seed substrate 3.
- a compound for example, argon gas
- the sapphire nitride substrate When a sapphire nitride substrate is used as the seed substrate 3, the sapphire nitride substrate is held immediately above the melt 4 immediately before being immersed in the Ga—Al compound financial solution 4, thereby annealing the sapphire nitride substrate with an AlN crystal. It can be carried out in the production equipment.
- the substrate temperature during the annealing process is equal to that of the melt 4 because the substrate is held immediately above the melt 4.
- the GaN and AlN microcrystals formed by combining the injected nitrogen with each of the gallium and aluminum in the melt are dissociated and decomposed into gallium and nitrogen. For this reason, AlN crystal growth is not inhibited.
- the melting point of the AlN crystal is 2000 ° C. or higher, and is stable at 1500 ° C. or lower.
- the AlN crystal can be grown under normal pressure conditions of 1 atm, and may be pressurized when the solubility of nitrogen is low.
- the seed substrate 3 is taken out from the Ga—Al compound liquid 4 and gradually cooled.
- the seed substrate 3 may be gradually cooled to a melting point of 660 ° C. of the aluminum simple substance while being immersed in the Ga—Al compound financial liquid 4, and AlN crystals may be generated during the slow cooling.
- gallium and aluminum having a low melting point and a high boiling point are used for the flux of the liquid phase growth method, and by injecting nitrogen gas into the flux, AlN is obtained at a temperature much lower than the melting point of aluminum nitride. Crystals can be grown in a liquid phase.
- the equipment for gas purification, exhaust gas treatment, etc. is not required, and a pressurized reaction vessel is not required, and the apparatus configuration is simplified, thereby reducing costs. it can.
- gallium is known as an element that can be easily recycled, and it contributes to energy saving and environmental conservation by recycling flux.
- this AlN crystal production method uses an expensive organometallic gas used in the MOVPE (Metal-Organic-Vapor-Phase Epitaxy) method, or a chlorine gas or hydrogen chloride gas used in the HVPE (Halide-Vapor Phase Epitixy) method. It is safe because there is no need to use raw materials.
- MOVPE Metal-Organic-Vapor-Phase Epitaxy
- HVPE Halide-Vapor Phase Epitixy
- Example 1 First, the c-plane sapphire substrate was held at a nitrogen partial pressure of 0.9 atm / CO partial pressure of 0.1 atm for 1 hour, and then held at a nitrogen partial pressure of 1.0 atm for 5 hours to obtain a sapphire nitride substrate.
- the crystallinity of the tilt component (the fluctuation of the crystal plane perpendicular to the crystal sample surface) is expressed by the half-value width of the X-ray diffraction rocking curve of the AlN crystal (002) plane, and the twist component (crystal The crystallinity of the fluctuation in the rotation direction in the sample plane is expressed by the half-value width of the rocking curve of the AlN crystal (102) plane.
- the half width of the AlN crystal (002) plane tilt was 83 arcsec
- the AlN crystal (102) plane twist was 407 arcsec.
- a flux composed of a Ga—Al compound financial liquid having a molar ratio of gallium to aluminum of 70:30 was heated in argon gas. After reaching the melting point of aluminum, 0.1 MPa of nitrogen gas was blown into the flux at a flow rate of 20 cc / min. And the temperature of the flux in a crucible was maintained at 1300 degreeC, and the said aluminum nitride board
- FIG. 4 is a graph showing measurement results of X-ray diffraction. Although c-plane peaks of the AlN (002) plane and sapphire (006) plane were observed, no peaks attributable to GaN and metal Ga were observed. The half width of the AlN crystal (002) plane tilt was 288 arcsec, and the half width of the (102) plane twist was 670 arcsec.
- FIG. 5 is a SEM observation photograph showing a cross section of the seed substrate after epitaxial growth.
- the film thickness of the AlN crystal was 2 ⁇ m, and an excellent AlN crystal with high orientation inheriting the quality of the nitride film on the sapphire nitride substrate could be epitaxially grown by 1 ⁇ m or more.
- FIG. 6A is a photograph of a cross section of a sapphire nitride substrate and an epitaxially grown AlN crystal observed with a transmission electron microscope.
- FIG. 6B shows a TEM observation photograph in which the interface between the sapphire nitride layer and the LPE layer is enlarged.
- an AlN film formed by nitriding the substrate and an AlN film epitaxially grown thereon were observed.
- the polarity of these AlN films was determined by the CBED (Convergent-beam electron diffraction) method.
- the AlN film formed by nitriding the sapphire substrate has a nitrogen polarity, but the AlN film epitaxially grown thereon is an AlN film. It was confirmed to be polar. That is, it was found that the polarity was reversed at the interface between the AlN film of the sapphire nitride substrate and the epitaxially grown AlN film.
- Example 2 A sapphire nitride substrate having an AlN crystal (002) plane tilt half-width of 36 arcsec and a (102) plane twist half-width of 461 arcsec was used except that this aluminum nitride substrate was immersed in the flux at normal pressure for 5 hours.
- aluminum nitride crystals were produced.
- the half width of the AlN crystal (002) plane tilt was 79 arcsec, and the half width of the (102) plane twist was 576 arcsec.
- the film thickness of the AlN crystal was 0.7 ⁇ m.
- Example 3 A sapphire nitride substrate having an AlN crystal (002) plane tilt half-width of 36 arcsec and a (102) plane twist half-width of 461 arcsec is used, and the aluminum nitride substrate is placed in a flux having a molar ratio of gallium to aluminum of 60:40.
- An aluminum nitride crystal was produced in the same manner as in Example 1 except that it was immersed for 5 hours at normal pressure.
- the half width of the AlN crystal (002) plane tilt was 50 arcsec, and the half width of the (102) plane twist was 544 arcsec.
- the film thickness of the AlN crystal was 1.0 ⁇ m.
- Example 4 A sapphire nitride substrate having an AlN crystal (002) plane tilt half width of 54 arcsec and a (102) plane twist half width of 439 arcsec is used, and the aluminum nitride substrate is placed in a flux with a gallium to aluminum molar ratio of 50:50.
- An aluminum nitride crystal was produced in the same manner as in Example 1 except that it was immersed for 5 hours at normal pressure.
- the half width of the AlN crystal (002) plane tilt was 68 arcsec, and the half width of the (102) plane twist was 698 arcsec.
- the film thickness of the AlN crystal was 0.3 ⁇ m.
- Example 5 A sapphire nitride substrate having an AlN crystal (002) plane tilt half-width of 43 arcsec and a (102) plane twist half-width of 443 arcsec is used, and the aluminum nitride substrate is placed in a flux having a molar ratio of gallium to aluminum of 40:60.
- An aluminum nitride crystal was produced in the same manner as in Example 1 except that it was immersed for 5 hours at normal pressure.
- the half width of the AlN crystal (002) plane tilt was 374 arcsec, and the half width of the (102) plane twist was 896 arcsec.
- the film thickness of the AlN crystal was 1.2 ⁇ m.
- Example 6 A flux having a molar ratio of gallium to aluminum of 98: 2 was heated in argon gas. After reaching the melting point of aluminum, 0.1 MPa of nitrogen gas was blown into the furnace at a flow rate of 20 cc / min. Then, the temperature of the flux in the crucible is kept at 1200 ° C., and an aluminum nitride substrate having an AlN crystal (002) plane tilt half width of 57 arcsecc and a (102) plane twist half width of 392 arcsec at normal pressure is immersed in the flux. I let you. After 6 hours, the aluminum nitride substrate was taken out of the flux and gradually cooled to produce aluminum nitride crystals.
- the half width of the AlN crystal (002) plane tilt was 238 arcsec, and the half width of the (102) plane twist was 417 arcsec.
- the film thickness of the AlN crystal was 1.2 ⁇ m.
- Table 2 lists the experimental conditions of Examples 1 to 6 and the evaluation of the AlN crystal film. From these results, it is possible to grow AlN crystals at a low temperature by using a Ga—Al compound liquid having a molar ratio of Ga to Al of 98: 2 to 40:60 as a flux. It was found that a good AlN crystal having Al polarity on a nitrogen polar substrate can be obtained. In particular, with a flux in which the molar ratio of Ga to Al is in the range of 98: 2 to 50:50, an excellent AlN crystal having an AlN crystal (002) plane half-width of 300 arcsec or less could be obtained. It was also found that excellent AlN crystals can be obtained even at normal pressure by injecting nitrogen gas into the flux (bubbling).
- Example 7 As an evaluation of the epitaxially grown AlN film, dislocation analysis and polarity determination were performed.
- an AlN film grown on a sapphire nitride substrate was used at 1300 ° C. for 5 h using a Ga—Al compound financial solution having a molar ratio of Ga to Al of 60:40 as a flux.
- the half width of the X-ray rocking curve was 50 arcsec for 0002 diffraction and 590 arcsec for 10-12 diffraction.
- the electron beam was incident from the [11-20] direction of the sample.
- the polarity was determined by comparing with the pattern obtained by simulation.
- the threading dislocation lines visible in FIGS. 7B and 7C are completely lost in the image of FIG. 7A. From this comparison, it was found that all the dislocations visible in the visual field of FIGS. 7A to 7C are edge dislocations, and the screw dislocations are extremely few compared to the edge dislocations. This coincided with the result estimated from the half-value width of XRC.
- FIG. 8A and 8B also show the CBED figure obtained in the experiment and the simulation pattern.
- FIG. 8A is an image of an AlN layer obtained by sapphire nitriding
- FIG. 8B is an image of an AlN layer grown by LPE (liquid phase epitaxy).
- LPE liquid phase epitaxy
- Example 8 Aluminum nitride was treated in the same manner as in Example 3 except that the aluminum nitride substrate was held at a position 3 cm immediately above the Ga—Al compound financial solution for 2 hours before being immersed in a flux having a molar ratio of gallium to aluminum of 60:40. Crystals were formed. The temperature of the aluminum nitride substrate held immediately above the Ga—Al compound liquid was 1300 ° C.
- the half width of the (002) plane tilt of the AlN crystal grown on the aluminum nitride substrate was 208 arcsec, and the half width of the (102) plane twist was 668 arcsec.
- the film thickness of the AlN crystal was 1.0 ⁇ m. Further, as a result of determining the polarity of the epitaxially grown AlN film, there was no Al domain, and there was no rotation domain shifted about 1 degree around the c axis as seen in Example 3. It seems that the AlN thin film of the aluminum nitride substrate is made into a single domain due to the annealing effect.
- thermocouple 1 gas introduction tube, 2 crucible, 3 seed substrate, 4 Ga-Al melt, 5 heater, 6 gas discharge tube, 7 thermocouple
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- Manufacturing & Machinery (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Physics & Mathematics (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Inorganic Chemistry (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
Description
1.本発明の概要
2.窒化アルミニウム結晶の製造方法
3.実施例
本件発明者らは、窒素雰囲気下におけるGaNの示差熱重量測定結果を報告している(清水圭一、平成14年東京工業大学大学院理工学研究科物質科学専攻修士論文)。
次に、本実施の形態における窒化アルミニウム結晶の製造方法について説明する。
以下、実施例を用いて本発明を説明するが、本発明はこれらの実施例に限定されるものではない。
先ず、c面サファイア基板を窒素分圧0.9atm/CO分圧0.1atmで1時間保持した後、窒素分圧1.0atmで5時間保持し、窒化サファイア基板を得た。c軸配向したAlN結晶について、チルト成分(結晶試料面に垂直な方向の結晶面の揺らぎ)の結晶性はAlN結晶(002)面のX線回折ロッキングカーブの半値幅で表し、ツィスト成分(結晶試料面内における回転方向の揺らぎ)の結晶性はAlN結晶(102)面のロッキングカーブの半値幅で表す。AlN結晶(002)面チルトの半値幅は、83arcsecであり、AlN結晶(102)面ツィストは、407arcsecであった。
AlN結晶(002)面チルトの半値幅が36arcsec、(102)面ツィストの半値幅が461arcsecである窒化サファイア基板を用い、この窒化アルミニウム基板をフラックス中に常圧で5時間浸漬させた以外は、実施例1と同様にして窒化アルミニウム結晶を生成させた。AlN結晶(002)面チルトの半値幅は79arcsecであり、(102)面ツィストの半値幅は576arcsecであった。また、AlN結晶の膜厚は0.7μmであった。また、エピタキシャル成長したAlN膜の極性を判定した結果Al極性であった。
AlN結晶(002)面チルトの半値幅が36arcsec、(102)面ツィストの半値幅が461arcsecである窒化サファイア基板を用い、この窒化アルミニウム基板をガリウムとアルミニウムのモル比率が60:40のフラックス中に常圧で5時間浸漬させた以外は、実施例1と同様にして窒化アルミニウム結晶を生成させた。AlN結晶(002)面チルトの半値幅は50arcsecであり、(102)面ツィストの半値幅は544arcsecであった。また、AlN結晶の膜厚は1.0μmであった。また、エピタキシャル成長したAlN膜の極性を判定した結果Al極性であった。
AlN結晶(002)面チルトの半値幅が54arcsec、(102)面ツィストの半値幅が439arcsecである窒化サファイア基板を用い、この窒化アルミニウム基板をガリウムとアルミニウムのモル比率が50:50のフラックス中に常圧で5時間浸漬させた以外は、実施例1と同様にして窒化アルミニウム結晶を生成させた。AlN結晶(002)面チルトの半値幅は68arcsecであり、(102)面ツィストの半値幅は698arcsecであった。また、AlN結晶の膜厚は0.3μmであった。また、エピタキシャル成長したAlN膜の極性を判定した結果Al極性であった。
AlN結晶(002)面チルトの半値幅が43arcsec、(102)面ツィストの半値幅が443arcsecである窒化サファイア基板を用い、この窒化アルミニウム基板をガリウムとアルミニウムのモル比率が40:60のフラックス中に常圧で5時間浸漬させた以外は、実施例1と同様にして窒化アルミニウム結晶を生成させた。AlN結晶(002)面チルトの半値幅は374arcsecであり、(102)面ツィストの半値幅は896arcsecであった。また、AlN結晶の膜厚は1.2μmであった。また、エピタキシャル成長したAlN膜の極性を判定した結果Al極性であった。
ガリウムとアルミニウムのモル比率が98:2のフラックスをアルゴンガス中で昇温させた。アルミニウムの融点に達した後、炉内に0.1MPaの窒素ガスを20cc/minの流速で吹き込んだ。そして、坩堝内のフラックスの温度を1200℃に保ち、常圧でAlN結晶(002)面チルトの半値幅が57arcsecc、(102)面ツィストの半値幅が392arcsecである窒化アルミニウム基板をフラックス中に浸漬させた。6時間経過した後、窒化アルミニウム基板をフラックス中から取り出して徐冷を行い、窒化アルミニウム結晶を生成させた。AlN結晶(002)面チルトの半値幅は238arcsecであり、(102)面ツィストの半値幅は417arcsecであった。また、AlN結晶の膜厚は1.2μmであった。また、エピタキシャル成長したAlN膜の極性を判定した結果Al極性であった。
次に、エピタキシャル成長したAlN膜の評価として、転位解析及び極性判定を行った。転位の観察及び極性判定の試料には、フラックスとしてGaとAlとのモル比が60:40のGa-Al合金融液を用い、1300℃で5h、窒化サファイア基板上に成長させたAlN膜を用いた。このAlN膜の結晶性をX線ロッキングカーブ測定により評価した結果、X線ロッキングカーブの半値幅は、0002回折で50arcsec、10-12回折で590arcsecであった。
窒化アルミニウム基板をガリウムとアルミニウムのモル比率が60:40のフラックスに浸漬する前に、Ga-Al合金融液の直上3cmの位置に2時間保持した以外は、実施例3と同様にして窒化アルミニウム結晶を生成させた。Ga-Al合金融液の直上に保持した窒化アルミニウム基板の温度は、1300℃であった。
Claims (8)
- Ga-Al合金融液にN原子を含有するガスを導入し、該Ga-Al合金融液中の種結晶基板上に窒化アルミニウム結晶をエピタキシャル成長させる窒化アルミニウム結晶の製造方法。
- 前記種結晶基板が、窒化サファイア基板であることを特徴とする請求項1記載の窒化アルミニウム結晶の製造方法。
- 前記窒化サファイア基板を900℃以上1500℃以下の温度でアニール処理することを特徴とする請求項2記載の窒化アルミニウム結晶の製造方法。
- 前記窒化サファイア基板に形成された窒素極性の窒化アルミニウム膜上に、Al極性の窒化アルミニウム結晶をエピタキシャル成長させることを特徴とする請求項2又は3記載の窒化アルミニウム結晶の製造方法。
- 前記Ga-Al合金融液にN2ガスを注入しながら、窒化アルミニウム結晶をエピタキシャル成長させることを特徴とする請求項1乃至4のいずれか1項に記載の窒化アルミニウム結晶の製造方法。
- 前記Ga-Al合金融液の温度を1000℃以上1500℃以下とし、窒化アルミニウム結晶をエピタキシャル成長させることを特徴とする請求項1乃至5のいずれか1項に記載の窒化アルミニウム結晶の製造方法。
- 前記Ga-Al合金融液のGaとAlとのモル比が98:2~40:60の範囲であることを特徴とする請求項1乃至6のいずれか1項に記載の窒化アルミニウム結晶の製造方法。
- 窒化サファイア基板に形成された窒素極性の窒化アルミニウム膜上に、Al極性の窒化アルミニウム結晶がエピタキシャル成長されてなる結晶基板。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201180034602.3A CN103052739B (zh) | 2010-07-14 | 2011-07-14 | 氮化铝晶体的制造方法 |
US13/809,261 US8735905B2 (en) | 2010-07-14 | 2011-07-14 | Method for producing aluminum nitride crystals |
KR1020137003253A KR101733838B1 (ko) | 2010-07-14 | 2011-07-14 | 질화알루미늄 결정의 제조 방법 |
EP11806875.8A EP2594666B1 (en) | 2010-07-14 | 2011-07-14 | Method for producing aluminum nitride crystals |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010159973 | 2010-07-14 | ||
JP2010-159973 | 2010-07-14 | ||
JP2011012770 | 2011-01-25 | ||
JP2011-012770 | 2011-01-25 | ||
JP2011050415A JP5656697B2 (ja) | 2010-07-14 | 2011-03-08 | 窒化アルミニウム結晶の製造方法 |
JP2011-050415 | 2011-03-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012008545A1 true WO2012008545A1 (ja) | 2012-01-19 |
Family
ID=45469540
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/066146 WO2012008545A1 (ja) | 2010-07-14 | 2011-07-14 | 窒化アルミニウム結晶の製造方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US8735905B2 (ja) |
EP (1) | EP2594666B1 (ja) |
JP (1) | JP5656697B2 (ja) |
KR (1) | KR101733838B1 (ja) |
CN (1) | CN103052739B (ja) |
TW (1) | TWI554658B (ja) |
WO (1) | WO2012008545A1 (ja) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013173638A (ja) * | 2012-02-24 | 2013-09-05 | Sumitomo Metal Mining Co Ltd | 窒化アルミニウム結晶の製造方法 |
JP2015024940A (ja) * | 2013-07-29 | 2015-02-05 | 住友金属鉱山株式会社 | 窒化アルミニウム結晶の製造方法 |
JP2015117151A (ja) * | 2013-12-18 | 2015-06-25 | 住友金属鉱山株式会社 | 窒化アルミニウム結晶の製造方法 |
JP2015189651A (ja) * | 2014-03-28 | 2015-11-02 | 住友金属鉱山株式会社 | 窒化アルミニウム結晶の製造方法 |
JP2016141575A (ja) * | 2015-01-30 | 2016-08-08 | 住友金属鉱山株式会社 | エピタキシャル成長用基板及びその製造方法 |
US10100426B2 (en) * | 2014-03-18 | 2018-10-16 | Ricoh Company, Ltd. | Method for producing gallium nitride crystal |
WO2019189378A1 (ja) * | 2018-03-27 | 2019-10-03 | 日本碍子株式会社 | 窒化アルミニウム板 |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6235398B2 (ja) * | 2013-05-27 | 2017-11-22 | 住友金属鉱山株式会社 | 窒化アルミニウム結晶の製造方法及び製造装置 |
JP6373615B2 (ja) * | 2014-03-28 | 2018-08-15 | 住友金属鉱山株式会社 | 窒化アルミニウム結晶の製造方法及び製造装置 |
JP6362555B2 (ja) * | 2015-02-25 | 2018-07-25 | 住友金属鉱山株式会社 | 窒化アルミニウム結晶の製造方法 |
USD768694S1 (en) | 2015-02-27 | 2016-10-11 | Samsung Electronics Co., Ltd. | Display screen or portion thereof with animated graphical user interface |
TWI576311B (zh) * | 2015-10-14 | 2017-04-01 | 國立清華大學 | 一種生產氮化鋁的鐵介質熔湯法及其生產設備 |
USD791828S1 (en) | 2015-12-23 | 2017-07-11 | Samsung Electronics Co., Ltd. | Display screen or portion thereof with graphical user interface |
CN105489723B (zh) * | 2016-01-15 | 2018-08-14 | 厦门市三安光电科技有限公司 | 氮化物底层及其制作方法 |
CN107305918B (zh) * | 2016-04-21 | 2019-04-12 | 元鸿(山东)光电材料有限公司 | 用于紫外光发光二极管的基板及该基板的制造方法 |
CN109994377A (zh) * | 2019-03-27 | 2019-07-09 | 北京大学 | 一种高质量AlN外延薄膜及其制备方法和应用 |
US11944956B2 (en) * | 2019-05-02 | 2024-04-02 | The Regents Of The University Of California | Room temperature liquid metal catalysts and methods of use |
KR102345481B1 (ko) | 2019-12-30 | 2022-01-03 | 주식회사 씽크풀 | 인공지능 기반의 종목연관 키워드 결정방법 및 그 시스템 |
KR102517743B1 (ko) | 2019-12-30 | 2023-04-05 | 주식회사 씽크풀 | 인공지능 기반의 투자지표 결정방법 및 그 시스템 |
KR20220073356A (ko) | 2020-11-26 | 2022-06-03 | 주식회사 씽크풀 | 인공지능 기반의 이슈 금융종목 결정방법 및 그 시스템 |
KR20230078153A (ko) | 2021-11-26 | 2023-06-02 | 주식회사 씽크풀 | 인공지능 기반의 예약주문 관리방법 및 그 시스템 |
CN114318502A (zh) * | 2021-12-31 | 2022-04-12 | 武汉锐科光纤激光技术股份有限公司 | AlGaN材料的生长方法 |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11189498A (ja) | 1997-06-11 | 1999-07-13 | Hitachi Cable Ltd | 窒化物結晶の製造方法、混合物、液相成長方法、窒化物結晶、窒化物結晶粉末、および気相成長方法 |
JP2004224600A (ja) | 2003-01-20 | 2004-08-12 | Matsushita Electric Ind Co Ltd | Iii族窒化物基板の製造方法および半導体装置 |
JP2005104829A (ja) | 2003-09-12 | 2005-04-21 | Tokuyama Corp | 高結晶性窒化アルミニウム積層基板およびその製造方法 |
WO2006030718A1 (ja) * | 2004-09-16 | 2006-03-23 | Ngk Insulators, Ltd. | AlN単結晶の製造方法およびAlN単結晶 |
JP2006213586A (ja) | 2005-02-07 | 2006-08-17 | Tokyo Institute Of Technology | 窒化アルミニウム単結晶積層基板 |
JP2006306638A (ja) * | 2005-04-26 | 2006-11-09 | Sumitomo Metal Ind Ltd | AlN単結晶の製造方法 |
JP2007039292A (ja) | 2005-08-04 | 2007-02-15 | Tohoku Univ | 窒化アルミニウム単結晶積層基板 |
JP2008266067A (ja) * | 2007-04-19 | 2008-11-06 | Ngk Insulators Ltd | 窒化アルミニウム単結晶の製造方法 |
JP2010159973A (ja) | 2009-01-06 | 2010-07-22 | Panasonic Corp | 流量計測装置 |
JP2011012770A (ja) | 2009-07-02 | 2011-01-20 | Aisin Ai Co Ltd | トランスミッションのリバースアイドラギヤ |
JP2011050415A (ja) | 2009-08-31 | 2011-03-17 | Nidek Co Ltd | 眼内レンズ |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6270569B1 (en) * | 1997-06-11 | 2001-08-07 | Hitachi Cable Ltd. | Method of fabricating nitride crystal, mixture, liquid phase growth method, nitride crystal, nitride crystal powders, and vapor phase growth method |
KR101167732B1 (ko) * | 2003-03-17 | 2012-07-23 | 오사카 유니버시티 | Ⅲ족 원소 질화물 단결정의 제조 방법 및 이것에 이용하는장치 |
US7338555B2 (en) * | 2003-09-12 | 2008-03-04 | Tokuyama Corporation | Highly crystalline aluminum nitride multi-layered substrate and production process thereof |
JPWO2006022302A1 (ja) * | 2004-08-24 | 2008-05-08 | 国立大学法人大阪大学 | 窒化アルミニウム結晶の製造方法およびそれにより得られた窒化アルミニウム結晶 |
JP2008266607A (ja) * | 2007-03-23 | 2008-11-06 | Nippon Shokubai Co Ltd | イソインドール類重合体の製造方法 |
CA2712148C (en) * | 2008-01-16 | 2012-08-07 | National University Corporation Tokyo University Of Agriculture And Tech Nology | Method for producing a laminated body having a1-based group-iii nitride single crystal layer, laminated body produced by the method, method for producing a1-based group-iii nitride single crystal substrate employing the laminated body, and aluminum nitride single crystal substrate |
-
2011
- 2011-03-08 JP JP2011050415A patent/JP5656697B2/ja active Active
- 2011-07-14 US US13/809,261 patent/US8735905B2/en active Active
- 2011-07-14 TW TW100124976A patent/TWI554658B/zh active
- 2011-07-14 KR KR1020137003253A patent/KR101733838B1/ko active IP Right Grant
- 2011-07-14 CN CN201180034602.3A patent/CN103052739B/zh active Active
- 2011-07-14 WO PCT/JP2011/066146 patent/WO2012008545A1/ja active Application Filing
- 2011-07-14 EP EP11806875.8A patent/EP2594666B1/en active Active
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11189498A (ja) | 1997-06-11 | 1999-07-13 | Hitachi Cable Ltd | 窒化物結晶の製造方法、混合物、液相成長方法、窒化物結晶、窒化物結晶粉末、および気相成長方法 |
JP2004224600A (ja) | 2003-01-20 | 2004-08-12 | Matsushita Electric Ind Co Ltd | Iii族窒化物基板の製造方法および半導体装置 |
JP2005104829A (ja) | 2003-09-12 | 2005-04-21 | Tokuyama Corp | 高結晶性窒化アルミニウム積層基板およびその製造方法 |
WO2006030718A1 (ja) * | 2004-09-16 | 2006-03-23 | Ngk Insulators, Ltd. | AlN単結晶の製造方法およびAlN単結晶 |
JP2006213586A (ja) | 2005-02-07 | 2006-08-17 | Tokyo Institute Of Technology | 窒化アルミニウム単結晶積層基板 |
JP2006306638A (ja) * | 2005-04-26 | 2006-11-09 | Sumitomo Metal Ind Ltd | AlN単結晶の製造方法 |
JP2007039292A (ja) | 2005-08-04 | 2007-02-15 | Tohoku Univ | 窒化アルミニウム単結晶積層基板 |
JP2008266067A (ja) * | 2007-04-19 | 2008-11-06 | Ngk Insulators Ltd | 窒化アルミニウム単結晶の製造方法 |
JP2010159973A (ja) | 2009-01-06 | 2010-07-22 | Panasonic Corp | 流量計測装置 |
JP2011012770A (ja) | 2009-07-02 | 2011-01-20 | Aisin Ai Co Ltd | トランスミッションのリバースアイドラギヤ |
JP2011050415A (ja) | 2009-08-31 | 2011-03-17 | Nidek Co Ltd | 眼内レンズ |
Non-Patent Citations (1)
Title |
---|
See also references of EP2594666A4 |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013173638A (ja) * | 2012-02-24 | 2013-09-05 | Sumitomo Metal Mining Co Ltd | 窒化アルミニウム結晶の製造方法 |
JP2015024940A (ja) * | 2013-07-29 | 2015-02-05 | 住友金属鉱山株式会社 | 窒化アルミニウム結晶の製造方法 |
JP2015117151A (ja) * | 2013-12-18 | 2015-06-25 | 住友金属鉱山株式会社 | 窒化アルミニウム結晶の製造方法 |
US10100426B2 (en) * | 2014-03-18 | 2018-10-16 | Ricoh Company, Ltd. | Method for producing gallium nitride crystal |
JP2015189651A (ja) * | 2014-03-28 | 2015-11-02 | 住友金属鉱山株式会社 | 窒化アルミニウム結晶の製造方法 |
JP2016141575A (ja) * | 2015-01-30 | 2016-08-08 | 住友金属鉱山株式会社 | エピタキシャル成長用基板及びその製造方法 |
WO2019189378A1 (ja) * | 2018-03-27 | 2019-10-03 | 日本碍子株式会社 | 窒化アルミニウム板 |
JPWO2019189378A1 (ja) * | 2018-03-27 | 2020-10-22 | 日本碍子株式会社 | 窒化アルミニウム板 |
US11383981B2 (en) | 2018-03-27 | 2022-07-12 | Ngk Insulators, Ltd. | Aluminum nitride plate |
Also Published As
Publication number | Publication date |
---|---|
EP2594666B1 (en) | 2017-05-10 |
EP2594666A1 (en) | 2013-05-22 |
KR20140003377A (ko) | 2014-01-09 |
US20130187170A1 (en) | 2013-07-25 |
CN103052739A (zh) | 2013-04-17 |
US8735905B2 (en) | 2014-05-27 |
JP2012167001A (ja) | 2012-09-06 |
CN103052739B (zh) | 2015-08-19 |
TW201221708A (en) | 2012-06-01 |
EP2594666A4 (en) | 2014-04-09 |
KR101733838B1 (ko) | 2017-05-08 |
JP5656697B2 (ja) | 2015-01-21 |
TWI554658B (zh) | 2016-10-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5656697B2 (ja) | 窒化アルミニウム結晶の製造方法 | |
KR101669259B1 (ko) | 적층체의 제조방법 | |
WO2009090821A1 (ja) | Al系III族窒化物単結晶層を有する積層体の製造方法、該製法で製造される積層体、該積層体を用いたAl系III族窒化物単結晶基板の製造方法、および、窒化アルミニウム単結晶基板 | |
JP5197283B2 (ja) | 窒化アルミニウム単結晶基板、積層体、およびこれらの製造方法 | |
WO2007015572A1 (ja) | 窒化アルミニウム単結晶膜、窒化アルミニウム単結晶積層基板およびそれらの製造方法 | |
JP6189664B2 (ja) | 窒化アルミニウム結晶の製造方法 | |
JP6362378B2 (ja) | 窒化アルミニウム結晶の製造方法 | |
JP6491488B2 (ja) | エピタキシャル成長用基板及びその製造方法 | |
JP6143148B2 (ja) | Iii族窒化物結晶の製造方法および半導体装置の製造方法 | |
JP5144192B2 (ja) | Iii族窒化物結晶の成長方法 | |
JP5865728B2 (ja) | 窒化アルミニウム結晶の製造方法 | |
JP2009018975A (ja) | 非極性面iii族窒化物単結晶の製造方法 | |
JP2008285401A (ja) | Iii族窒化物単結晶基板の製造方法、および該基板を積層した積層基板 | |
JP4481118B2 (ja) | 高結晶性窒化アルミニウム積層基板の製造方法 | |
JP6235398B2 (ja) | 窒化アルミニウム結晶の製造方法及び製造装置 | |
JP2008273768A (ja) | Iii族窒化物結晶の成長方法およびiii族窒化物結晶基板 | |
WO2023162936A1 (ja) | AlN単結晶の製造方法、AlN単結晶、およびAlN単結晶製造装置 | |
JP2015189650A (ja) | 窒化アルミニウム結晶の製造方法及び製造装置 | |
JP7448925B2 (ja) | AlN単結晶の製造方法、AlN単結晶、およびAlN単結晶製造装置 | |
ソンイェリン | Growth of GaN and AlN crystals by the flux film coating technique | |
JP6159245B2 (ja) | 窒化アルミニウム結晶の製造方法 | |
JP2006069814A (ja) | 窒化アルミニウム積層基板 | |
Mokhov et al. | Ioffe Physical-Technical Institute of the Russian Academy of Sciences, St. Petersburg, Russia | |
Onuma et al. | Structural, optical, and homoepitaxial studies on the bulk GaN single crystals spontaneously nucleated by the Na-flux method | |
Kubo et al. | Homoepitaxial growth of GaN layers by reactive molecular-beam epitaxy on bulk GaN single crystals prepared by pressure-controlled solution growth |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201180034602.3 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11806875 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
REEP | Request for entry into the european phase |
Ref document number: 2011806875 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2011806875 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 20137003253 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13809261 Country of ref document: US |