WO2004008551A1 - 窒化ガリウム系化合物半導体装置 - Google Patents
窒化ガリウム系化合物半導体装置 Download PDFInfo
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- WO2004008551A1 WO2004008551A1 PCT/JP2003/008365 JP0308365W WO2004008551A1 WO 2004008551 A1 WO2004008551 A1 WO 2004008551A1 JP 0308365 W JP0308365 W JP 0308365W WO 2004008551 A1 WO2004008551 A1 WO 2004008551A1
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- Prior art keywords
- layer
- ingan
- less
- composition ratio
- light emitting
- Prior art date
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- 229910002601 GaN Inorganic materials 0.000 title claims description 49
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 title claims description 31
- 239000004065 semiconductor Substances 0.000 title claims description 19
- 150000001875 compounds Chemical class 0.000 title claims description 17
- 230000004888 barrier function Effects 0.000 claims abstract description 38
- 239000000758 substrate Substances 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims description 63
- 239000010410 layer Substances 0.000 description 199
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 0.000 description 15
- 238000005253 cladding Methods 0.000 description 12
- 230000007423 decrease Effects 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 230000005428 wave function Effects 0.000 description 3
- 229910002704 AlGaN Inorganic materials 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000004807 localization Effects 0.000 description 2
- 238000002488 metal-organic chemical vapour deposition Methods 0.000 description 2
- 229920002120 photoresistant polymer Polymers 0.000 description 2
- 230000005701 quantum confined stark effect Effects 0.000 description 2
- 230000006798 recombination Effects 0.000 description 2
- 238000005215 recombination Methods 0.000 description 2
- 229910052594 sapphire Inorganic materials 0.000 description 2
- 239000010980 sapphire Substances 0.000 description 2
- XCZXGTMEAKBVPV-UHFFFAOYSA-N trimethylgallium Chemical compound C[Ga](C)C XCZXGTMEAKBVPV-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 240000002329 Inga feuillei Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- UIUXUFNYAYAMOE-UHFFFAOYSA-N methylsilane Chemical compound [SiH3]C UIUXUFNYAYAMOE-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- 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
- H01L33/02—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 characterised by the semiconductor bodies
- H01L33/26—Materials of the light emitting region
- H01L33/30—Materials of the light emitting region containing only elements of Group III and Group V of the Periodic Table
- H01L33/32—Materials of the light emitting region containing only elements of Group III and Group V of the Periodic Table containing nitrogen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
-
- 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
- H01L33/02—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 characterised by the semiconductor bodies
- H01L33/04—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 characterised by the semiconductor bodies with a quantum effect structure or superlattice, e.g. tunnel junction
- H01L33/06—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 characterised by the semiconductor bodies with a quantum effect structure or superlattice, e.g. tunnel junction within the light emitting region, e.g. quantum confinement structure or tunnel barrier
Definitions
- the present invention relates to a gallium nitride (GaN) -based compound semiconductor device, and more particularly to a structure of a light-emitting element that mainly emits light in a wavelength band of about 375 nm or less.
- GaN gallium nitride
- the wavelength 375 ⁇ with InG aN as the light emitting layer! LEDs in the ⁇ 600 nm band have been developed.
- UV LEDs with a wavelength of 375 nm or less have been actively developed.
- the demand for such short-wavelength LEDs is extremely large, for example, it is possible to apply a white light source in combination with a phosphor and use a bactericidal action.
- the InGaN As a light emitting layer, when the emission wavelength is 375 nm or less, the In composition X becomes very small, and the fluctuation of the In composition is reduced, resulting in a significant decrease in luminous efficiency.
- light emission at a wavelength of 363 nm or less is in principle impossible if InGaN is used as the light emitting layer. Disclosure of the invention
- the present invention mainly provides a GaN-based compound semiconductor device having excellent luminous efficiency even at a wavelength of 375 nm or less.
- the present invention provides a gallium nitride-based compound semiconductor device having a GaN-based light-emitting layer formed on a substrate, wherein the light-emitting layer is a multilayer quantum well layer in which an InGaN well layer and an A 1 InGaN barrier layer are stacked. MQW).
- the band gap of the Al InGa N barrier layer is wider than the band gap of InGaN.
- the effective band gap of the N-well layer is enlarged, and the emission wavelength is shortened.
- a 1 InGaN as a barrier layer, lattice mismatch with the InGaN well layer is reduced, thereby reducing distortion and improving luminous efficiency.
- the In composition ratio of the InGaN well layer can be, for example, 5% or more and 15% or less.
- the thickness of the InGaN well layer can be, for example, 1 nm or more and 2 nm or less.
- the A 1 composition ratio of the A 1 InGaN barrier layer can be, for example, 14% or more and 40% or less.
- the In composition ratio of the A1InGaN barrier layer can be, for example, 0.1% or more and 5% or less.
- the device may further include an Al InGaN buffer layer adjacent to the light emitting layer.
- an AlInGaN buffer layer adjacent to the light emitting layer the carrier is efficiently injected into the light emitting layer to improve the light emitting efficiency.
- the A 1 composition ratio of the A 1 InGaN buffer layer can be, for example, 0.5% or more and 40% or less.
- the Iri composition ratio of the AlInGaN buffer layer can be, for example, 0.1% or more and 5% or less.
- FIG. 1 is a configuration diagram of an LED according to the embodiment.
- FIG. 2 is a detailed configuration diagram of the light emitting layer in FIG.
- FIG. 3 is a graph showing the relationship between the flow rate of TMA flowing in the barrier layer and the output power.
- FIG. 4 is a graph showing the relationship between the flow rate of TMA flowing in the buffer layer and the output power.
- FIG. 1 shows the configuration of an LED according to the present embodiment.
- Sin buffer layer 12, low temperature (LT) growth buffer layer 14, An AND GaN layer 16 is formed. These are layers for reducing dislocations.
- An n-GaN layer 18 for lowering the operating voltage is formed on the AND GaN layer 16.
- SLS Simulation Layer Superlattice: SLS
- SLS relaxed Layer Superlattice: SLS
- A1 GaN n-GaN / n-A1GaN
- AlInGaN buffer layer 22 and a light emitting layer 24 are formed on the n- clad layer 20.
- the light emitting layer 24 is composed of a multilayer quantum well MQW in which an InGaN well layer and an AlInGaN barrier layer are stacked.
- an SLS layer p-GaN / p_Al GaN in which GaN and AlGaN are stacked is formed as a p-cladding layer 26. That is, the LED of the present embodiment has a configuration in which the AlInGaN buffer layer 22 and the MQW light emitting layer 24 are sandwiched between the n-layer 20 and the p-layer 26.
- a p-GaN layer 28 for lowering the operating voltage is formed on the p-cladding layer 26, and a p-electrode 30 is formed on the p-GaN layer 28.
- a part of the n-GaN layer 18 is exposed, and an n-electrode 32 is formed thereon.
- Each layer is grown by MOCVD using a MOCVD apparatus.
- InGaN or the like is used as the light-emitting layer 24, but in the present embodiment, a multilayer quantum well MQW in which an InGaN well layer and an AlInGaN barrier layer are alternately stacked is used as the light-emitting layer 24. Further, when the light emitting layer 24 is sandwiched between the n-type cladding layer 20 and the p-type cladding layer 26, an A 1 InGaN buffer layer 22 is formed adjacent to the light emitting layer 24.
- FIG. 2 shows the configuration of the light emitting layer 24 in FIG. Emitting layer 24, I The InGaN well layer 24 b and A 1 x I n y G a x - constituted by alternately laminating y N barrier layer 24 a.
- the thickness of the InGaN well layer 24b is, for example, 1.5 nm
- the thickness of the A1InGaN barrier layer 24a is, for example, 12 nm.
- the number of repetitions is, for example, 7 pairs (14 layers).
- the band gap of the Al InGaN barrier layer 24a is wider than the band gap of the InGaN well layer 24b.
- a lx ln y Ga les y N barrier layer 24 a also (y> 0) for containing I n, resulting in composition fluctuations of I n, localization Kiyaria occurs for the same reason as the well layer 24 b Irrespective of the presence of dislocations, a decrease in luminous efficiency is suppressed.
- the lattice mismatch between the A 1 InGaN and the InGaN well layer 24 b is smaller, and lattice mismatch dislocation is less likely to occur. It has the advantage of high crystallinity.
- the strain generated in the well layer 24b and the barrier layer 24a in A 1 InGaN is small.
- the hexagonal nitride semiconductor When these layers are grown on the c-plane and a compressive or tensile stress is applied in the plane, the hexagonal nitride semiconductor generates an electric field in the c-axis direction due to piezoelectricity. This electric field moves the electron-hole pairs injected into the well layer 24b in the opposite direction, thereby reducing the spatial overlap of their wave functions and reducing the recombination rate. That is, if the well layer 24b is distorted, the luminous efficiency decreases.
- Such an effect is particularly prominent when the well layer 24b is wide, but there may be some influence even when the well layer 24b is narrow.
- Al InGaN is used as the barrier layer 24a to reduce lattice mismatch and suppress the distortion of the well layer 24b, so that a decrease in luminous efficiency due to the quantum confined Stark effect is also suppressed.
- the effective band of the InGaN well layer 2b is formed by the quantum effect.
- the emission wavelength can be reduced to 360 nm or less by widening the gap. In this respect, it is essentially different from LEDs with a wavelength of 380 nm or less, for example, in which Al InGaN is used as the light emitting layer instead of InGaN.
- the thickness of the InGaN layer should be 2 nm or less.
- the luminous efficiency decreases. This is because the wave functions of electrons and holes confined in the well layer seep into the barrier (outside the well), and the contribution of recombination in the barrier increases.
- the InGaN well layer 24b needs to be thinned to 2 nm or less (for example, 1.5 nm) in order to generate a quantum effect, but the light emitting layer 24 of the present embodiment emits light from an InGaN thin film. There is no decrease in the luminous efficiency that occurs when a layer is formed.
- A1 InG aN is used as the noria layer 24a, so that the band gap of the InGaN well layer 24b is effectively widened as described above, and the wave function is applied to the barrier layer 24a. This is because the bleeding has become smaller.
- the growth temperature of A 1 InGaN which is the barrier layer 24a, is higher than the growth temperature of InGaN (650 ° C. to 750 ° C.) (eg, 800 ° C.) because A 1 InGaN contains A1. It is necessary to By growing the substrate at a temperature of 750 ° C. or higher, the crystallinity of the barrier layer 24a also increases.
- the buffer layer 22 is made of AlInGaN. Since the buffer layer 22 contains A 1, the band gap is widened, and is wider than the well layer 24b made of InGaN. The layer 22 improves the efficiency of injecting electrons into the well layer 24b, and conversely reduces the amount of holes flowing into the buffer layer 22 to efficiently confine electrons and holes in the well layer 24b.
- the A1 composition of the buffer layer 22 can be set to, for example, about 40%.
- the LED of this embodiment is manufactured through the following process. That is, the sapphire c-plane substrate 10 is placed on a susceptor in a reaction tube using a normal pressure MOC VD. Apparatus, and is heat-treated at 110 ° C. in a hydrogen atmosphere for 10 minutes. Then reduce the temperature to 500 ° C. A monomethylsilane gas and an ammonia gas are flowed from the gas inlet tube for 100 seconds, and the SiN buffer layer 12 is grown discontinuously (or in an island shape) on the substrate 10.
- a GaN buffer layer (LT buffer layer) 14 having a thickness of 25 nm is grown at the same temperature by supplying trimethyl gallium and ammonia gas from a gas inlet tube. Then, the temperature was raised to 10 ⁇ 5 ° C., and trimethylgallium and ammonia gas were supplied again to grow an undoped GaN layer 16 having a thickness of 2 ⁇ m.
- the Si-doped n-GaN layer (n-electrode layer) 18 to which run gas is added is grown 1.0 m.
- the carrier density in the n—GaN layer 18 is approximately 5 ⁇ 10 18 cm— 3 .
- the same temperature in the S i de one flop n- A lo. IGao.
- Trimethylaluminum (TMA) is used as the raw material for A1.
- the average electron density of the n-cladding layer 20 is 5 ⁇ 10 18 cm— 3 .
- the temperature is lowered to about 800 ° C., and an Alo.051 no. OiGao. 94 N buffer layer 22 is grown.
- the thickness of the buffer layer 22 is 36 nm. Since the growth temperature is as low as 800 ° C, its resistivity is high. After growing al I The InGaN buffer layer 22, and one-flop I n 0 at the same 800 ° C Gao 9 N (1.
- the MQW light emitting layer 24 is grown by growing 7 pairs of N (95 nm). The total thickness of the light emitting layer 24 is 95 nm.
- Table 1 shows the structure, composition, film thickness, and growth temperature of each layer.
- Emitting layer (well layer Z barrier layer) InGaN1.5nm / AIInGaN 12nm well (In: ⁇ 10%), 95nm 800
- Buffer layer SI-AIInGaN 36nm In: 1%, Al ⁇ 5% 36nm 800 n Clut layer n- (GaN2nm / AIGaN2nm) Al: ⁇ 10% 200nm 1075
- n-A1 of Si-do as n-class layer 20.
- Gao. 9 N (1.6 nm) / Si-doped n-GaN (1.6 nm) was grown in 50 pairs to form an SLS structure.
- CuG a 0. 59 N was 20 nm formed, In 0. 05 Ga 0. 95 N quantum well layer as a light emitting layer 24 (1. ⁇ , ⁇ ⁇ .4 I no. OiG ao. 59 N
- the growth temperature when growing each layer is also an example, and for example, the buffer layer 22 and the light emitting layer 24 may be grown at 840 ° C.
- the wafer Is removed from the MO CVD device Ni (10 nm) and Au (10 nm) are sequentially vacuum-deposited to form on the surface, and heat-treated at 520 ° C in a nitrogen gas atmosphere containing 5% oxygen to form a deposited metal film. Is referred to as a p-transparent electrode 30.
- n-electrode 32 is formed on the entire surface, and etching for forming an n-electrode is performed using the photoresist as a mask.
- Ti 5 nm
- a 1 5 nm
- Ti 5 nm
- a 1 5 nm
- p-electrode 30 and n-electrode 32 A gold pad with a thickness of 500 nm for wire bonding is formed in the portion, the back surface of the substrate 10 is polished to 100 m, and chips are cut out by scrubbing and mounted to obtain an LED device.
- the LED device created as described above was placed in an integrating sphere, current was injected, and the total light output from the LED device was measured.
- the light output was about 1.6 mW at an injection current of 2 OmA.
- the emission wavelength was in the range of 5 nm at 360 nm, although there was some variation within the plane of the 2-inch diameter wafer.
- FIG. 3 shows the results.
- the horizontal axis is the TMA flow rate (flow rate: s c.cm) during the growth of the barrier layer 24a, and indicates the relative flow rate of the gas flowing into the container. It is something.
- the vertical axis is the relative value of the emission intensity, which is approximately the value measured using an integrating sphere.
- the composition of the barrier layer 24a grown in this state has an In composition ratio of about 1% and an A1 composition ratio of about 20%. Since the A1 composition ratio is almost proportional to the TMA flow rate, it is desirable from the viewpoint of luminous efficiency that the A1 composition ratio of the ammonia layer 24a be greater than 14% (20 ⁇ 7 sccm / 10 scom). On the other hand, if the A1 composition ratio is too large, current injection becomes difficult, and the operating voltage increases. Accordingly, the lower limit of the A1 composition ratio of the barrier layer 24a is determined by the luminous efficiency, and the upper limit is determined by the operating voltage. Specifically, the upper limit is preferably 14% or more and 40% or less, more preferably 16% or more. Less than 40% is more desirable.
- the band gap becomes narrower as the In composition ratio increases, so it is desirable that the In composition ratio is smaller, but the In composition ratio is zero. In this case, the luminous efficiency is drastically reduced. This is because the fluctuation of the In composition is
- the lower limit of the In composition ratio of the barrier layer 24a is determined by the amount of composition fluctuation, and the upper limit is determined by the band gap. Specifically, 0.1% or more and 5% or less are desirable. , 0.1% or more and 3% or less are more preferable.
- One example of the composition of the barrier layer 24 a is a composition ratio of A 1 40%, Al was a l% composition ratio of I n 0. A 4 In 0. 01 Ga 0. 59 N.
- the optimum In composition ratio is determined depending on the required emission wavelength and the thickness of the well layer 24b. For example, when the emission wavelength is 36 Onm, 5% or more and 15% or less are desirable, and 5% or more and 13% or less are more desirable.
- An example of the composition of the well layer 24b is In, where the composition ratio of In is 5%. .. 5 Ga. 95 N.
- the thickness is preferably 1 nm or more and 2 nm or less so that the quantum effect appears.
- the growth temperature of the well layer 24b and the barrier layer 24a is desirably 750 ° C or higher as described above, and is preferably 770 ° C. The above (for example, 800 ° C) is more desirable.
- the TMA flow rate during the growth of the barrier layer 24a in the light-emitting layer 24 was fixed at 10 sccm, and the change in luminous efficiency was measured by changing the TMA flow during the growth of the AlGaN buffer layer 22. did.
- FIG. 4 shows the results.
- the horizontal axis is the TMA flow rate (flow rate), which is a relative value.
- the vertical axis is the relative value of the output power.
- the Al composition ratio of the Al InGaN buffer layer 22 is preferably 0.5% or more and 400% or less, more preferably 1% or more and 40% or less.
- the In composition ratio of the Al InGaN buffer layer 22 it has been confirmed that the luminous efficiency is drastically reduced when the In composition ratio is zero. This is probably because the fluctuation of the In composition occurs in the buffer layer 22 and contributes to the improvement of the luminous efficiency. Therefore, the In composition ratio of the Al InGaN buffer layer 22 is preferably 0.1% or more and 5% or less, and more preferably 0.1% or more and 3% or less.
- One example of the composition of al I The InGaN buffer layer 22, the A1 composition ratio of 40%, and I n composition ratio was 1% A lo.41 no. 01 Ga 0.
- the effective band gap of InGaN is enlarged by using a multilayer quantum well structure in which InGaN wells and AlInGaN barrier layers of a predetermined composition range are alternately stacked as the light emitting layer 24. 340 ⁇ ! To 375 nm, improving the luminous efficiency by using Al InGaN as the barrier layer, and providing the A 1 InGaN buffer layer 22 of a specified composition range adjacent to the luminescent layer. Can be efficiently injected to improve luminous efficiency As described above, the embodiments of the present invention have been described. However, the present invention is not limited to the embodiments, and various modifications are possible.
- the SiN buffer layer 12 is formed. However, this is for suppressing dislocation, and the SiN buffer layer 12 may not be formed as necessary.
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Abstract
Description
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2004521142A JP4234101B2 (ja) | 2002-07-16 | 2003-07-01 | 窒化ガリウム系化合物半導体装置 |
EP03738612A EP1536486A4 (en) | 2002-07-16 | 2003-07-01 | COMPOSITE SEMICONDUCTOR ELEMENT ON GALLIUM NITRID BASE |
US10/521,544 US7700940B2 (en) | 2002-07-16 | 2003-07-01 | Gallium nitride-based compound semiconductor device |
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JP2002-206581 | 2002-07-16 | ||
JP2002206581 | 2002-07-16 |
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WO2004008551A1 true WO2004008551A1 (ja) | 2004-01-22 |
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PCT/JP2003/008365 WO2004008551A1 (ja) | 2002-07-16 | 2003-07-01 | 窒化ガリウム系化合物半導体装置 |
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US (1) | US7700940B2 (ja) |
EP (1) | EP1536486A4 (ja) |
JP (1) | JP4234101B2 (ja) |
KR (1) | KR101002271B1 (ja) |
CN (1) | CN100521260C (ja) |
TW (1) | TWI292629B (ja) |
WO (1) | WO2004008551A1 (ja) |
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WO2010024436A1 (ja) * | 2008-08-29 | 2010-03-04 | 株式会社 東芝 | 半導体装置 |
US20120187366A1 (en) * | 2004-08-13 | 2012-07-26 | Seoul National University Industry Foundation | Growth method of nitride semiconductor layer and light emitting device using the growth method |
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JP4234101B2 (ja) | 2009-03-04 |
US7700940B2 (en) | 2010-04-20 |
JPWO2004008551A1 (ja) | 2005-11-17 |
EP1536486A4 (en) | 2006-11-08 |
CN100521260C (zh) | 2009-07-29 |
TWI292629B (en) | 2008-01-11 |
TW200405591A (en) | 2004-04-01 |
KR101002271B1 (ko) | 2010-12-20 |
KR20050026473A (ko) | 2005-03-15 |
EP1536486A1 (en) | 2005-06-01 |
CN1669158A (zh) | 2005-09-14 |
US20050236642A1 (en) | 2005-10-27 |
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