WO2006011361A1 - Iii族窒化物単結晶およびその製造方法、ならびに半導体デバイス - Google Patents
Iii族窒化物単結晶およびその製造方法、ならびに半導体デバイス Download PDFInfo
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- WO2006011361A1 WO2006011361A1 PCT/JP2005/012886 JP2005012886W WO2006011361A1 WO 2006011361 A1 WO2006011361 A1 WO 2006011361A1 JP 2005012886 W JP2005012886 W JP 2005012886W WO 2006011361 A1 WO2006011361 A1 WO 2006011361A1
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- 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
- C30B13/00—Single-crystal growth by zone-melting; Refining by zone-melting
- C30B13/02—Zone-melting with a solvent, e.g. travelling solvent process
-
- 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
- C30B7/00—Single-crystal growth from solutions using solvents which are liquid at normal temperature, e.g. aqueous solutions
-
- 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
- C30B7/00—Single-crystal growth from solutions using solvents which are liquid at normal temperature, e.g. aqueous solutions
- C30B7/005—Epitaxial layer growth
-
- 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
Definitions
- the present invention relates to a method for producing an in-group nitride single crystal used for semiconductor devices such as light emitting elements, electronic elements, and semiconductor sensors. Specifically, the present invention relates to a method for producing a group m nitride single crystal with high yield and efficiency.
- Group m nitride single crystals are very useful as materials for forming substrates of semiconductor devices such as light-emitting elements, electronic elements, and semiconductor sensors.
- Such a V group nitride single crystal has hitherto been known as a vapor phase method such as HVPE (hydride vapor phase epitaxy) method, MOCVD (organic metal vapor phase epitaxy) method (for example, see Non-Patent Document 1), or It was grown by a liquid phase method such as a high nitrogen pressure synthesis method or a flux method (see, for example, Patent Document 1 and Non-Patent Document 2).
- a vapor phase method such as HVPE (hydride vapor phase epitaxy) method, MOCVD (organic metal vapor phase epitaxy) method
- a liquid phase method such as a high nitrogen pressure synthesis method or a flux method (see, for example, Patent Document 1 and Non-Patent Document 2).
- a SiC single crystal can be formed at a high crystal growth rate by superimposing a SiC single crystal substrate serving as a seed crystal and a SiC polycrystalline plate via a Si melt layer. It has been proposed to lengthen the length (for example, see Patent Document 2).
- the transport of carbon atoms in the solid phase is a problem
- the transport of nitrogen atoms in the gas phase is a problem. It is different in that it is.
- Patent Document 1 Japanese Patent Laid-Open No. 2001-58900
- Patent Document 2 JP 2002-47100 A
- Non-patent literature 1 H. Morkoc, 'Comprehensive characterization of Hvdnde VPE grown GaN layers and template "," Materials Science and Engineering “, R33, (2001), pl35 -207
- Non-Patent Document 2 Hisanori Yamane and 2 others, “Growth of GaN single crystals by the flux method”, Applied Physics, Japan Society of Applied Physics, 2002, No. 71, No. 5, p548-552
- An object of the present invention is to provide a method for producing a group 111 nitride single crystal with high raw material yield and high crystal growth rate! That is, in order to produce a group III nitride single crystal with a high yield and a high crystal growth rate, it is a problem to transport the group III element atom and the nitrogen atom efficiently.
- a liquid layer having a thickness of 200 m or less is formed between a substrate and a group III nitride material substrate, and a group III nitride single crystal is grown on the surface of the substrate on the liquid layer side. This is a method for producing a group nitride single crystal.
- At least the liquid layer side surface layer of the substrate is formed of an in group nitride single crystal, and the group m nitride raw material substrate is It can be formed of group nitride polycrystal.
- the surface layer on the liquid layer side of the substrate and the in group nitride raw material substrate are formed of the in group nitride single crystal
- the surface on the liquid layer side can be a group m atomic surface
- the surface on the liquid layer side of the group m nitride material substrate can be a nitrogen atom surface.
- the liquid layer can contain at least one element selected from a group force that also has elemental force to form a group m nitride single crystal.
- the present invention is an in-group nitride single crystal obtained by the above-described method for producing a group m nitride single crystal.
- the present invention is a semiconductor device including the group III nitride single crystal described above.
- the yield of the raw material is high and the crystal growth rate is high.
- a method for producing a group III nitride single crystal can be provided.
- FIG. 1A is a schematic diagram for explaining a method for producing a group III nitride single crystal according to the present invention.
- FIG. 1B is a schematic diagram for explaining a method for producing a group III nitride single crystal according to the present invention.
- FIG. 2A is a schematic diagram for explaining one specific example in the method for producing a group III nitride single crystal according to the present invention.
- FIG. 2B is a schematic diagram for explaining one specific example in the method for producing a group III nitride single crystal according to the present invention.
- FIG. 2C is a schematic diagram for explaining one specific example in the method for producing a group III nitride single crystal according to the present invention.
- FIG. 3A is a schematic diagram for explaining another specific example in the method for producing a group III nitride single crystal according to the present invention.
- FIG. 3B is a schematic diagram for explaining another specific example in the method for producing a group III nitride single crystal according to the present invention.
- FIG. 3C is a schematic diagram for explaining another specific example in the method for producing a group III nitride single crystal according to the present invention.
- FIG. 4 is a schematic diagram for explaining one specific example of a semiconductor device according to the present invention.
- a method for producing a group III nitride crystal according to the present invention is described with reference to FIG. 1, as shown in FIG. 1A, with a thickness of 200 m or less between a substrate 1 and a group III nitride material substrate 2.
- a group III nitride single crystal 4 is grown on the surface Is on the liquid layer side of the substrate 1. Make it.
- the group III element and the nitrogen element in the group III nitride material substrate 2 are converted into the group III nitride material substrate 2
- the liquid layer 3 is dissolved into the liquid layer 3 from the surface 2s on the liquid layer side, and is transported by the liquid layer 3 to the surface Is on the liquid layer side of the substrate 1 to grow the group 1 nitride single crystal 4 on the substrate 1.
- this liquid layer is as small as 200 m or less, the transport of nitrogen does not become a rate-limiting step, and the growth rate is determined by the dissolution of nitrogen from the group X-nitride material substrate 2.
- the crystal growth rate of the group III nitride single crystal can be increased.
- At least the liquid layer side surface layer la of substrate 1 is formed of group III nitride single crystal, and group III nitride
- the raw material substrate 2 is preferably formed of group III nitride polycrystal.
- At least the liquid layer side surface layer la of the substrate 1 is formed of a group III nitride single crystal, and the same kind of group IV nitride single crystal is grown on the surface Is of the substrate 1 on the liquid layer side.
- a large group III nitride single crystal with good crystallinity can be obtained.
- the liquid layer side of the substrate 1 is formed.
- the surface Is is a group III nitride single crystal surface
- the surface 2s on the liquid layer side of the group III nitride raw material substrate 2 is a group III nitride polycrystal surface.
- the surface of the group III nitride polycrystal has higher surface energy than the surface of the group III nitride single crystal, so the surface 2s on the liquid layer side of the group III nitride raw material substrate 2 is changed to the surface on the liquid phase side of the substrate 1.
- At least the surface layer Is on the liquid layer side of substrate 1 and the group III nitride raw material substrate 2 are group III. It is preferably formed of a single crystal nitride, the surface Is on the liquid layer side of the substrate 1 is a group III atomic surface, and the surface 2s on the liquid layer side of the group III nitride raw material substrate 2 is a nitrogen atomic surface.
- the surface Is on the liquid layer side of the substrate 1 is the group IV atomic plane of the group X nitride single crystal and the surface 2s on the liquid layer side of the group X nitride raw material substrate 2 is the nitrogen of the group X nitride single crystal.
- the nitrogen atomic plane has a higher surface energy than the group III atomic plane.
- the group X atomic plane is a group of group X element nitrides forming a group III nitride single crystal arranged in one plane, and the plane is defined as the plane X, X, X
- the (oooi) plane corresponds to the nitride single crystal
- the (ill) plane corresponds to the cubic group m nitride single crystal.
- the nitrogen atom plane means that the nitrogen atoms forming the group m nitride single crystal are arranged on one plane.
- the liquid layer 3 is not particularly limited as long as it facilitates transport of the group m nitride raw material. Although it does not exist, it is preferable to include at least one element selected from the group force of elemental force that forms a group m nitride single crystal. By containing at least one element among the elements forming the group m nitride single crystal, the transport of the group-in nitride raw material can be promoted.
- the liquid layer is made of Al, alumina (Al 2 O 3),
- the liquid layer preferably contains Ga or the like. Furthermore, Al Ga N single crystal (0 ⁇ ⁇ 1)
- the liquid layer contains A1 and Z or Ga.
- liquid layer 3 having a thickness of 200 m or less between substrate 1 and group III nitride raw material substrate 2, but the liquid From the viewpoint of easily forming the layer 3, the following two methods are preferably used.
- the first method is as follows. First, referring to FIG. 2A, a solid layer 5 having a thickness T that is melted to form a liquid layer 3 is formed on the surface 2s of the group-II nitride raw material substrate 2, and a crystal growth capacity is formed.
- the group III nitride raw material substrate 2 in which the solid layer 5 is formed on the substrate 1 placed in the vessel 11 is placed so that the solid layer 5 is in contact with the surface Is of the substrate 1.
- a solid layer 5 having a thickness T that is melted on the surface Is of the substrate 1 to form the liquid layer 3 is formed on the surface Is, and III is formed on the solid layer 5.
- Group nitride material substrate 2 is placed. Where the thickness of the group III nitride raw material substrate 2 or substrate 1 is The method for forming the solid layer 5 of T is not particularly limited.
- a sputtering method, a vapor deposition method or the like is preferably used.
- heating the crystal growth vessel 11 causes the solid layer 5 to melt, and the thickness between the substrate 1 and the group III nitride material substrate 2 is reduced.
- the liquid layer 3 is formed. More
- the crystal growth vessel 11 is held at a predetermined temperature (crystal growth temperature) for a predetermined time (crystal growth time), whereby a group III nitride is formed on the surface Is on the liquid layer side of the substrate 1 Single crystal 4 can be grown.
- This method is preferably used when the thickness of the liquid layer is 50 m or less, more preferably 30 m or less.
- the thickness of the liquid layer exceeds 50 m, it becomes difficult for the liquid layer 3 to escape from between the substrate 1 and the II-nitride source substrate 2 and to keep the thickness of the liquid layer 3 constant. It becomes difficult to control the growth rate of group III nitride single crystals.
- the second method is as follows. First, referring to FIG. 3A, for example, the outer circumference of the substrate 1 placed in the crystal growth vessel 11 is divided into four equal parts, and the spacer 12 having a thickness T is provided at four points.
- the group III nitride raw material substrate 2 is placed on the spacer 12, and the solid layer 5 that is melted and becomes the liquid layer 3 is placed on the group III nitride raw material substrate 2. Therefore, at this time, a gap 13 having a distance T between the substrate 1 and the group III nitride raw material substrate 2 is formed.
- the crystal growth vessel 11 is provided with a vacuum pump 14 for evacuating the crystal growth vessel 11.
- the crystal growth vessel 11 is heated and evacuated with the vacuum pump 14, whereby the solid layer 5 is melted to form the liquid layer 3, and the liquid layer 3 is A liquid layer 3 having a thickness T is formed between the substrate 1 and the group VIII nitride raw material substrate 2 and extends to every corner of the void 13.
- Crystal growth vessel 11 by holding the crystal growth vessel 11 at a predetermined temperature (crystal growth temperature) for a predetermined time (crystal growth time), a group III nitride unit is formed on the surface Is on the liquid layer side of the substrate 1. Crystal 4 can be grown.
- the degree of vacuum in the crystal growth vessel 11 is not particularly limited as long as the liquid layer 3 is sufficient to spread to every corner of the gap portion 13.
- lkPa (0. Olatm) or less. can do.
- This method can easily form a liquid layer having a thickness of 50 m or more, and the thickness of the spacer. This is excellent in that the thickness of the liquid layer can be set freely.
- a group III nitride single crystal according to the present invention is obtained by the above-described method for producing a group III nitride single crystal.
- a semiconductor device is a semiconductor device including the above-mentioned group IV nitride single crystal.
- the group III nitride single crystal is included in a semiconductor device as a group III nitride single crystal substrate, for example.
- one semiconductor device includes an n-type GaN layer 22, an InGaN layer 23, and an A1 GaN layer 24 on a group III nitride single crystal substrate 21.
- P-type GaN layer P-type GaN layer
- n-side electrode 31 is formed on the lower surface of the group III nitride single crystal substrate 11 and a p-side electrode 32 is formed on the upper surface of the p-type GaN layer 25. Be emitted.
- a substrate 1 in which an A1N single crystal layer having a thickness of 5 m is grown on a sapphire substrate having a diameter of 15 mm by the MOCVD method, and a group III nitride material substrate 2 having a diameter of 15 mm ⁇ thickness of lmm A1N polycrystalline substrate was prepared.
- an A1 metal layer having a thickness of 10 m was formed as a solid layer 5 on one surface of the group III nitride material substrate 2 by sputtering.
- the crystal growth vessel 11 is heated to melt the A1 metal layer, which is the solid layer 5, and between the substrate 1 and the group III nitride raw material substrate 2.
- An A1 melt layer having a thickness of 10 ⁇ m as the liquid layer 3 was formed.
- the surface of the liquid layer side of substrate 1 is heated by heating crystal growth container 11 to 1800 ° C. (crystal growth temperature) and holding it for 3 hours (crystal growth time).
- crystal growth temperature crystal growth temperature
- crystal growth time 3 hours
- the crystal growth rate was 3 O / z mZhr.
- the single crystals of the examples in the present application were confirmed to be single crystals by XRD (X-ray diffraction) method. The results are summarized in a table. [0041] (Example 2)
- a substrate 1 in which an A1N single crystal layer having a thickness of 5 m is grown on a sapphire substrate having a diameter of 15 mm by MOCVD and a group III nitride material substrate 2 having a diameter of 15 mm ⁇ thickness of 1 mm A1N polycrystalline substrate was prepared.
- a spacer 12 having a thickness of 35 nm is placed on four points on the substrate 1 arranged in the crystal growth vessel 11, for example, on the outer periphery, and the group III nitride is placed on the spacer 12.
- the raw material substrate 2 was placed, and the A1 metal was placed as the solid layer 5 which was melted on the group III nitride raw material substrate 2 to become the liquid layer 3.
- a gap 13 having a distance of 35 nm between the substrate 1 and the group III nitride material substrate 2 was formed.
- the crystal growth vessel 11 is heated to 1000 ° C., and the vacuum pump 14 is used for lkPa (0.
- the A1 metal that is the solid layer 5 is melted to form the liquid layer 3 with the A1 melt, and this liquid layer 3 spreads to every corner of the gap 13 to form the substrate 1 and An A1 melt layer (liquid layer 3) having a thickness of 35 nm is formed between the group III nitride raw material substrate 2 and the substrate.
- the crystal growth vessel 11 is heated to 1800 ° C. and held for 3 hours, whereby a group III nitride single crystal is formed on the surface Is on the liquid layer side of the substrate 1. 4 A1N single crystal with a thickness of 27 m was grown. The crystal growth rate was 9 / z mZhr. The results are summarized in a table.
- A1N single crystal substrate with a diameter of 15 mm and a thickness of 500 m is used as the substrate, and the distance between the substrate and the group III nitride material substrate (equal to the thickness of the liquid layer, the same shall apply hereinafter) is 150; ⁇ ⁇ , crystal growth
- An A1N single crystal having a thickness of 16 ⁇ m was grown in the same manner as in Example 2 except that the temperature was 2100 ° C. and the crystal growth time was 4 hours. The crystal growth rate was 4 ⁇ mZhr. The results are summarized in a table.
- Y O -A1 O (mass ratio 40:60) is used as the material of the solid layer, and the diameter is 15 mm as the substrate.
- Example 2 Same as Example 1 except that a 500 m thick A1N single crystal substrate was used, the distance between the substrate and the group III nitride material substrate was 22 / ⁇ ⁇ , and the crystal growth time was 2 hours. An A1N crystal having a thickness of m was grown. The crystal growth rate was 18 mZhr. Table the results I stopped.
- Gd O -A1 O (mass ratio 15:85) is used as the material of the solid layer, and the diameter is 15 mm as the substrate.
- Example 1 except that a 500 m thick A1N single crystal substrate was used, the distance between the substrate and the group III nitride material substrate was 20 / ⁇ ⁇ , and the crystal growth time was 0.5 hours. Similarly, an A1N crystal having a thickness of 10.5 ⁇ m was grown. The crystal growth rate was 21 ⁇ mZhr. The results are summarized in a table.
- Sm O -A1 O (mass ratio 55:45) is used as the material of the solid layer, and the diameter is 15 mm as the substrate
- Example 1 except that a 500 m thick A1N single crystal substrate was used, the distance between the substrate and the group III nitride material substrate was 20 / ⁇ ⁇ , and the crystal growth time was 0.5 hours. Similarly, an A1N crystal having a thickness of 10.5 ⁇ m was grown. The crystal growth rate was 21 ⁇ mZhr. The results are summarized in a table.
- Sm O -A1 O (mass ratio 55:45) is used as the material of the solid layer, and the diameter is 15 mm as the substrate
- Example 2 Similar to Example 2, except that a 500 m thick A1N single crystal substrate was used and the distance between the substrate and the group III nitride raw material substrate was 200 m. Crystals were grown. The crystal growth rate was 3 mZhr. The results are summarized in a table.
- a hexagonal GaN single crystal substrate having a diameter of 15 mm and a thickness of 350 m was prepared as the substrate 1 and the group III nitride material substrate 2, and the nitrogen of the group III nitride material substrate 2 was prepared.
- a 10 ⁇ m thick Na metal layer was formed as a solid layer 5 by sputtering.
- the group III nitride raw material substrate 2 having the solid layer 5 formed on the group III element surface ((0001) surface) of the substrate 1 placed in the crystal growth vessel 11 such as a crucible is connected to the solid layer 5 and the substrate.
- the plate 1 was placed in contact with the group III element surface ((0001) surface).
- the crystal growth vessel 11 is heated to melt the Na metal layer, which is the solid layer 5, between the substrate 1 and the group III nitride material substrate 2.
- a Na melt layer having a thickness of 10 ⁇ m as the liquid layer 3 was formed.
- the crystal growth vessel 11 is heated to 800 ° C. and held for 2 hours, whereby the surface Is (group III atomic plane, (0001) on the liquid layer side of the substrate 1 A 30 m-thick GaN single crystal, which is a group III nitride single crystal 4, was grown on the surface.
- the crystal growth rate is 15 mZ hr.
- a hexagonal GaN single crystal substrate having a diameter of 15 mm and a thickness of 350 / zm was prepared as substrate 1 and group III nitride material substrate 2.
- a spacer 12 having a thickness of 20 nm is placed on four points, for example, on the outer circumference of the group 1 element atomic plane (Ga plane, (0001) plane) of the substrate 1 placed in the crystal growth vessel 11.
- the group III nitride source substrate 2 is placed on the spacer 12, and the group III element atomic plane (Ga plane) of the group III nitride source substrate 2 is the nitrogen atom plane (N plane, (000-1) plane).
- the crystal growth vessel 11 is heated to 300 ° C. and evacuated to lkPa (0.0 latm) with the vacuum pump 14, so that the Ga metal as the solid layer 5 is melted and dissolved in Ga.
- a liquid layer 3 is formed from the liquid, and this liquid layer 3 extends to every corner of the gap 13, and a Ga melt layer (liquid layer) having a thickness of 20 nm is formed between the substrate 1 and the group III nitride raw material substrate 2. 3) was formed.
- the crystal growth vessel 11 is heated to 800 ° C. and held for 6 hours, whereby a group III nitride single crystal 4 is formed on the surface Is on the liquid layer side of the substrate 1.
- a 48 m thick GaN single crystal was grown.
- the crystal growth rate was 8 / z mZhr. The results are summarized in a table.
- AlGaN calcined body with a diameter of 15 mm and a thickness of 1 mm GaN powder and A1N powder (4 in molar ratio) as a substrate 1 on which a single crystal layer was grown by MOCVD and a group III nitride material substrate 2 : Mixed with 1)
- a Na—Al—Ga alloy layer (mass ratio 5: 2: 3) having a thickness of 20 ⁇ m was formed as a solid layer 5 on one surface of the substrate 1 by sputtering.
- the group III nitride raw material substrate 2 was placed on the solid layer 5 of the substrate 1 placed in the crystal growth vessel 11 such as a crucible.
- the Al—Ga alloy layer was melted to form a 20 ⁇ m thick Na—Al—Ga melt layer as the liquid layer 3 between the substrate 1 and the group III nitride material substrate 2.
- the crystal growth vessel 11 is heated to 800 ° C. (crystal growth temperature).
- Crystal growth time By holding for 6 hours (crystal growth time), a 54 m-thick A1N single crystal, which is a group III nitride single crystal 4, was grown on the surface Is on the liquid layer side of the substrate 1. Crystal growth rate is 90
- A1N crystal with a thickness of 0.6 / zm was obtained in the same way as in Example 1, except that the distance between the substrate and the group IV nitride substrate was 300 m. Also, the crystal growth rate was as low as 0.2 / z mZhr. The results are summarized in a table.
- a liquid with a thickness of 200 m or less between the substrate and the group III nitride material substrate could be obtained with high yield and high crystal growth rate by forming the body layer and growing the group IV nitride single crystal on the surface of the liquid layer side of the substrate. .
- Example 8 the surface of a GaN single crystal having a diameter of 15 mm and a thickness of 30 ⁇ m obtained on the GaN single crystal substrate (Group III nitride single crystal substrate 21) obtained by mirror polishing was obtained.
- MOCVD ⁇ -type GaN layer 22 with a thickness of 5 ⁇ m, InGaN layer 23 with a thickness of 3 nm, Al with a thickness of 60 nm
- a GaN layer 24 and a p-type GaN layer 25 having a thickness of 150 nm were sequentially grown.
- each chip has a minute
- n-side electrode 31 with a diameter of 80 m X and a thickness of lOOnm was formed at the center of the lower surface of the GaN substrate when separated, and a p-side electrode 32 with a thickness of lOOnm was formed on the upper surface of the p-type GaN layer 25 .
- the group III nitride layer 20 was separated into 400 ⁇ 400 / ⁇ m chips to form an LED as the semiconductor device 40.
- the emission spectrum of this LED was measured with a spectrometer, it had an emission spectrum with a peak wavelength of 450 nm!
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EP05759959.9A EP1818430B1 (en) | 2004-07-27 | 2005-07-13 | Method for preparation of iii group nitride single crystal |
CN200580019599.2A CN1969067B (zh) | 2004-07-27 | 2005-07-13 | Ⅲ族氮化物单晶体及其制造方法以及半导体器件 |
US10/569,813 US7534295B2 (en) | 2004-07-27 | 2005-07-13 | III nitride single crystal manufacturing method |
US12/419,310 US8008173B2 (en) | 2004-07-27 | 2009-04-07 | III nitride single crystal and method of manufacturing semiconductor device incorporating the III nitride single crystal |
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JP2004218663A JP4259414B2 (ja) | 2004-07-27 | 2004-07-27 | Iii族窒化物単結晶の製造方法 |
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EP (1) | EP1818430B1 (ja) |
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CN102443842A (zh) * | 2011-05-05 | 2012-05-09 | 中国科学院福建物质结构研究所 | 一种AlGaN单晶制备方法 |
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US7575982B2 (en) * | 2006-04-14 | 2009-08-18 | Applied Materials, Inc. | Stacked-substrate processes for production of nitride semiconductor structures |
US20070241351A1 (en) * | 2006-04-14 | 2007-10-18 | Applied Materials, Inc. | Double-sided nitride structures |
JP4899911B2 (ja) * | 2007-02-16 | 2012-03-21 | 日立電線株式会社 | Iii族窒化物半導体基板 |
US7982409B2 (en) | 2009-02-26 | 2011-07-19 | Bridgelux, Inc. | Light sources utilizing segmented LEDs to compensate for manufacturing variations in the light output of individual segmented LEDs |
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US6328796B1 (en) * | 1999-02-01 | 2001-12-11 | The United States Of America As Represented By The Secretary Of The Navy | Single-crystal material on non-single-crystalline substrate |
JP4011828B2 (ja) | 1999-06-09 | 2007-11-21 | 株式会社リコー | Iii族窒化物結晶の結晶成長方法及びiii族窒化物結晶の製造方法 |
CN1113988C (zh) * | 1999-09-29 | 2003-07-09 | 中国科学院物理研究所 | 一种氮化镓单晶的热液生长方法 |
JP3541789B2 (ja) | 2000-07-31 | 2004-07-14 | 日新電機株式会社 | 単結晶SiCの育成方法 |
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2004
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2005
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- 2005-07-13 WO PCT/JP2005/012886 patent/WO2006011361A1/ja active Application Filing
- 2005-07-13 CN CN200910007530.8A patent/CN101503825B/zh not_active Expired - Fee Related
- 2005-07-13 CN CN200580019599.2A patent/CN1969067B/zh not_active Expired - Fee Related
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EP1017113A1 (en) | 1997-01-09 | 2000-07-05 | Nichia Chemical Industries, Ltd. | Nitride semiconductor device |
WO2002099169A1 (fr) * | 2001-06-04 | 2002-12-12 | The New Industry Research Organization | Carbure de silicium monocristal et son procede de production |
JP2004189549A (ja) * | 2002-12-12 | 2004-07-08 | Sumitomo Metal Mining Co Ltd | 窒化アルミニウム単結晶の製造方法 |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN102443842A (zh) * | 2011-05-05 | 2012-05-09 | 中国科学院福建物质结构研究所 | 一种AlGaN单晶制备方法 |
Also Published As
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CN101503825A (zh) | 2009-08-12 |
US20090197398A1 (en) | 2009-08-06 |
CN101503825B (zh) | 2013-01-23 |
US20080169532A1 (en) | 2008-07-17 |
CN1969067B (zh) | 2012-07-11 |
JP4259414B2 (ja) | 2009-04-30 |
EP1818430A4 (en) | 2010-03-17 |
JP2006036587A (ja) | 2006-02-09 |
EP1818430A1 (en) | 2007-08-15 |
EP1818430B1 (en) | 2013-04-10 |
US7534295B2 (en) | 2009-05-19 |
US8008173B2 (en) | 2011-08-30 |
CN1969067A (zh) | 2007-05-23 |
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