WO1997008759A1 - Dispositif emetteur de lumiere bleue et son procede de fabrication - Google Patents
Dispositif emetteur de lumiere bleue et son procede de fabrication Download PDFInfo
- Publication number
- WO1997008759A1 WO1997008759A1 PCT/JP1996/002434 JP9602434W WO9708759A1 WO 1997008759 A1 WO1997008759 A1 WO 1997008759A1 JP 9602434 W JP9602434 W JP 9602434W WO 9708759 A1 WO9708759 A1 WO 9708759A1
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- WO
- WIPO (PCT)
- Prior art keywords
- gallium nitride
- layer
- blue light
- conductivity type
- based semiconductor
- Prior art date
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 239000004065 semiconductor Substances 0.000 claims abstract description 134
- 229910002601 GaN Inorganic materials 0.000 claims abstract description 108
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 claims abstract description 95
- 238000000034 method Methods 0.000 claims abstract description 32
- 239000012535 impurity Substances 0.000 claims abstract description 26
- 239000011261 inert gas Substances 0.000 claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000002230 thermal chemical vapour deposition Methods 0.000 claims abstract description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 35
- 239000000758 substrate Substances 0.000 claims description 28
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 19
- 239000007789 gas Substances 0.000 claims description 18
- 229910052757 nitrogen Inorganic materials 0.000 claims description 18
- 229910052594 sapphire Inorganic materials 0.000 claims description 13
- 239000010980 sapphire Substances 0.000 claims description 13
- 238000005253 cladding Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000012495 reaction gas Substances 0.000 claims description 6
- 230000004913 activation Effects 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000012159 carrier gas Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 112
- 150000001875 compounds Chemical class 0.000 description 19
- 229910052739 hydrogen Inorganic materials 0.000 description 10
- 239000001257 hydrogen Substances 0.000 description 9
- 229910021529 ammonia Inorganic materials 0.000 description 8
- 150000004767 nitrides Chemical class 0.000 description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 7
- 238000000137 annealing Methods 0.000 description 6
- 239000013078 crystal Substances 0.000 description 6
- 239000010931 gold Substances 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 229910052737 gold Inorganic materials 0.000 description 5
- 239000011777 magnesium Substances 0.000 description 4
- -1 gallium nitride compound Chemical class 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000001020 plasma etching Methods 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 229910052790 beryllium Inorganic materials 0.000 description 2
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- LPIQUOYDBNQMRZ-UHFFFAOYSA-N cyclopentene Chemical compound C1CC=CC1 LPIQUOYDBNQMRZ-UHFFFAOYSA-N 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 229910052738 indium Inorganic materials 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 229910052711 selenium Inorganic materials 0.000 description 2
- 239000011669 selenium Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 241000287463 Phalacrocorax Species 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002488 metal-organic chemical vapour deposition Methods 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- RGSFGYAAUTVSQA-UHFFFAOYSA-N pentamethylene Natural products C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier 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 with at least one potential-jump barrier or surface barrier 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 system
- H01L33/32—Materials of the light emitting region containing only elements of group III and group V of the periodic system containing nitrogen
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S438/00—Semiconductor device manufacturing: process
- Y10S438/93—Ternary or quaternary semiconductor comprised of elements from three different groups, e.g. I-III-V
Definitions
- the present invention relates to a blue light-emitting device using a gallium nitride-based compound semiconductor and a method for manufacturing the same.
- gallium nitride compound semiconductors such as GAN, InGAN, and GAIN have been developed using blue light emitting diodes (LEDs) and blue laser diodes. It has been noted as a material for LD (LD). The use of this compound semiconductor has made it possible to emit blue light of sufficient intensity, which has been difficult so far.
- FIG. 7 shows the basic structure of such a conventional LED. That is, the blue light-emitting element 2 includes an N-type GaN semiconductor layer 202, which is stacked on a suffix substrate 200 via a buffer layer 201. The P-type GaN semiconductor layer 203 is formed. Light is emitted by pouring a carrier into a depletion layer between the N-type GaN semiconductor layer 202 and the P-type GaN semiconductor layer 203. Power.
- a CVD method is used.
- a sapphire substrate is formed by the above method, and a gallium nitride semiconductor forming each layer is laminated thereon. Then, separate the individual chips by cutting them into appropriate sizes. Finally, connect the chip to the wireframe and wire as necessary to make the product
- an object of the present invention is to provide a gallium nitride-based blue light-emitting element requiring a small number of manufacturing steps and a method for manufacturing the same.
- An object of the present invention is to provide a gallium nitride-based blue light-emitting element having high strength and low power consumption and a method for manufacturing the same.
- a blue light-emitting device includes a first gallium nitride-based semiconductor layer to which a first conductivity type impurity is added, and a substantially genuine semiconductor layer.
- a gallium nitride-based semiconductor active layer and a second gallium nitride-based semiconductor layer to which an impurity of a second conductivity type opposite to the first conductivity type is added are laminated. ing .
- the first and second gallium nitride-based semiconductor layers and the gallium nitride-based semiconductor active layer are naturally cooled in an inert gas after being formed by thermal CVD. Re — More than 7% of the added impurities are activated.
- the first gallium nitride-based semiconductor layer to which the impurity of the first conductivity type is added, and the substantially true gallium nitride semiconductor layer are formed.
- the lithium-based semiconductor active layer has a second conductivity type opposite to the first conductivity type.
- the second gallium nitride-based semiconductor layer to which the pure substance is added is formed by thermal CVD in a vacuum chamber, and then naturally cooled in an inert gas.
- a thermal annealing process is not required, the manufacturing process is simplified, and the yield is improved.
- a gallium nitride-based compound semiconductor blue light-emitting element having high emission intensity and low power consumption can be realized.
- FIG. 1 is a sectional view showing a layer structure of a semiconductor chip of a gallium nitride-based compound semiconductor blue light emitting diode according to the present invention.
- FIG. 2 is a sectional view showing a gallium nitride according to the present invention.
- FIG. 1 is a schematic diagram showing a CDV device for forming a layer structure of a semiconductor chip of a blue compound light emitting diode.
- FIG. 3 is a diagram showing a temperature change in a manufacturing process of a gallium nitride-based compound semiconductor blue light emitting diode according to the present invention.
- FIG. 4 is a diagram showing a gallium nitride according to the present invention.
- FIG. 4 is a diagram showing another example of a blue light emitting diode based on a compound semiconductor.
- FIG. 5 shows an example of using a gallium nitride-based compound semiconductor-semiconductor laser of a blue-color light emitting diode according to the present invention.
- FIG. 6 shows a gallium nitride compound semiconductor according to the present invention.
- FIG. 5 is a diagram showing another example using a semiconductor laser of a blue-emitting diode of a compound semiconductor.
- FIG. 7 is a cross-sectional view showing a conventional example of a layer structure of a semiconductor chip of a gallium nitride-based compound semiconductor blue light emitting diode.
- the gallium nitride-based compound semiconductor blue light emitting diode 1 is composed of a gallium nitride-based semiconductor buffer layer 101, a gallium nitride
- the N-type semiconductor three-layered semiconductor layer 102 is formed thereon, and the nitrided N-type semiconductor cladding layer 103 is formed thereon.
- An electrode 108 connected to the semiconductor contact layer 102 and an electrode 107 connected to the gallium nitride-based P-type semiconductor clad layer 105 are formed. You.
- an InA1GaN compound semiconductor is used as a gallium nitride-based semiconductor.
- a wide range of blue light emission is realized.
- the following is an example of a specific composition.
- G is I n A
- the nitrided N-type semiconductor buffer layer 101 is formed of a nitrided N-type semiconductor buffer layer. This is intended to reduce lattice mismatch between the gallium-based semiconductor contact layer 1-2 and the sapphire substrate 1 ⁇ 0.
- I n (x) A 1 (y) G a (1-xy) N The value of each parameter over time is, for example, 0 ⁇ x ⁇ K 0 ⁇ y ⁇ 1 or preferably 0 ⁇ X ⁇ 0.5, 0 ⁇ y ⁇ 0.5 o
- the gallium nitride-based N-type semiconductor contact layer 1-2 is for providing a contact surface to the electrode 108.
- the value of the laminating value is, for example, 0 ⁇ X ⁇ 1, 0 ⁇ y ⁇ 1 or 0 ⁇ X ⁇ 1 for the gallium nitride N-type semiconductor contact layer 102. It is selected as X ⁇ 0.3 and 0 ⁇ y ⁇ 0.3.
- impurities such as silicon and selenium have been added. However, the impurity concentration is 6 Xio 18 cffl " 3-
- the gallium nitride-based N-type semiconductor cladding layer 103 constitutes the N side of the PIN junction forming the light emitting region. I n (x)
- each parameter of A 1 (y) G a (1-xy) N is appropriately adjusted according to the wavelength to be emitted, for example, 0 ⁇ X ⁇ 1, 0 ⁇ y ⁇ 1 Preferably, 0 ⁇ X ⁇ 0.3 s 0.1 ⁇ y ⁇ 1. After all, some impurities such as silicon and selenium have been added to make them N-type, but the impurity concentration is 3 ⁇ 10 18 cm— ⁇ .
- the gallium nitride-based semiconductor active layer 104 is a layer of substantially an intrinsic semiconductor that forms a central region of the light emitting region.
- 0 ⁇ ⁇ 1, 0 ⁇ y ⁇ 1 preferably, 0 ⁇ X ⁇ 0
- Gallium nitride-based p-type semiconductor node, layer 1-5 is composed of In (XN A 1 (y) G a (1) which constitutes the P side of the PIN junction forming the light emitting region. - ⁇ -y)
- the value of each parameter of N depends on the relationship between the gallium nitride-based semiconductor layer 101 and the gallium nitride-based semiconductor active layer 104.
- Is adjusted appropriately according to the wavelength to be emitted for example, 0 ⁇ X ⁇ 1, 0 ⁇ y ⁇ 1, preferably 0 ⁇ X ⁇ 0.3, 0.1 ⁇ y ⁇ 1.0 o
- impurities such as magnesium, beryllium, and zinc have been added to make it a P-type. Ru Oh at 3 X 10 lo cm one 3.
- the gallium nitride based P-type semiconductor contact layer 106 is for providing a contact surface to the electrode 107.
- each layer over time is the case of a nitrided N-type semiconductor contact layer 102.
- 0 ⁇ X ⁇ K 0 ⁇ y ⁇ 1 preferably 0
- impurities such as magnesium, beryllium, and zinc are added in order to obtain a P-type. No! The concentration of the substance is 8 10 18 cm- 3 o
- the electrode 107 is a transparent electrode for emitting light from the gallium nitride based semiconductor active layer 104.
- metals and acids such as IT0 (indium ⁇ tin oxide) It is formed from elemental compounds, but may be formed sufficiently thin of metals such as Al and Ni.
- Electrode 108 is the other electrode, but need not be particularly transparent.
- it may be formed of a metal such as T i, A 1, and N i.
- the values of the parameters In (x) A1 (y) Ga (1-xy) N are the same as those of the gallium nitride-based N-type semiconductor cladding layer 1.
- the band gap of the N 3 and the P-type semiconductor nitride layer 105 is larger than the band gap of the active N 4 semiconductor layer 104. Is also decided to be large. By doing so, the amount of carrier injected into the gallium nitride based semiconductor active layer 104 can be increased, and the emission intensity can be further improved. And can be done.
- FIG. 2 shows an outline of the CVD device.
- This apparatus includes a vacuum chamber 20, a substrate holder 21 provided therein, a reaction gas introduction pipe 22, an exhaust pipe 23, and a substrate holder 21. It consists of a high-frequency coil (not shown) and a power to heat the placed substrate.
- the substrate 100 is placed on the substrate holder 21, and the inside of the vacuum chamber 20 is exhausted to a pressure of 760 to 1 Torr. After that, high-frequency heating is started and a reaction gas containing an organic metal is introduced.
- a reaction gas for example, Ga (CH 3 ) 3 and In (CH 3 ). , A 1 (CH n) 3 and NH 3, introduced together with a carrier gas consisting of hydrogen, nitrogen, etc. 7/08759
- the reaction pressure is about 760 Torr.
- the substrate temperature is set to 10 ⁇ 0 to 140 0.
- the temperature for forming a gallium nitride based semiconductor buffer layer is set at 50 ° C. C to 200,000, i.e., 800 to
- Lower to 1200 ° C o For example, at 1200 ° C 100. Lower the temperature to C to form an N-type contact layer or N-type clad layer doped with an appropriate impurity.o In the formation of the active layer, raise the temperature further from 300 V to 6 Decrease by 0 0 c. That is, 0 0 immediately. In the case of C, lower it from, for example, 600 ° C to 900 ° C. Finally, the substrate temperature is raised again to the initial temperature, for example, 0 ° C, and the necessary laminate is completed by forming the P-type cladding layer and the P-type u-contact layer.
- the reaction gas inside the vacuum chamber 20 is completely replaced with an inert gas.
- the inert gas it is preferable to use nitrogen, but other inert gases such as H and Ar may be used.
- the internal pressure is adjusted to 600 to 900 Torr, for example, 760 Torr, and in that state, 2 to 3 hours put .
- the substrate temperature drops to the room temperature level (for example, about 25.C), so the sapphire substrate is removed from the vacuum chamber 20.
- the sapphire substrate taken out of the vacuum chamber 20 is cut to a suitable size as it is with a diamond cutter. Divide and get many chips. When a blue light-emitting element is fabricated with that chip, light emission with sufficient intensity can be seen, and it is a component that the heat annealing as post-processing is not required.
- the present invention it is not necessary to perform thermal annealing as post-processing on the sapphire substrate taken out from the vacuum chamber 20, and the process is simplified, The time required for manufacturing is also reduced.
- the formed device itself tends to have a higher luminous intensity than before.
- FIG. 4 is a structural sectional view of a light emitting diode 500 according to another embodiment of the present invention. A method for manufacturing the light emitting diode 500 without using this structural sectional view will be described in order.
- a sapphire substrate 501 having a c-plane as a main surface subjected to organic cleaning and acid cleaning is placed on a heatable susceptor in a MOCVD apparatus.
- the heating method may be either a resistor heater or an induction heating method.
- N buffer layer 502 formed 0
- the supply of TMG was stopped, and the temperature was reduced to 110 ° C. at a rate of 50 ° C. or less. The temperature rose to C. If the heating rate force at this time is larger than 50 ° C., the surface force of the buffer layer 502 is increased, and irregularities occur on the surface of the single crystal layer.
- the thickness of the buffer layer 503 of the crystal semiconductor (GaN) is 1.8
- N contact / injection layer 504 was formed with a thickness of 4 m.
- the temperature was raised to 110 ° C by applying nitrogen at 20 LZ, hydrogen at 10 L / oCc, and ammonia at 10 L / division, and the temperature was raised to 7 * -0.
- the P-type layer is a single layer.
- the contact layer is G aN and the injection layer is AlG aN, and the carrier concentration is higher in the contact layer than in the injection layer.
- the supply gas was switched to 30 LZ of nitrogen, and the temperature was lowered to room temperature.
- the activation rate was 8% in the P-type GaN layer for the Mg concentration of 3 ⁇ 10 19 cm ⁇ 13.
- the activation rate in this case is defined as the value obtained by normalizing the receptor concentration with the Mg concentration.
- the atmosphere is 20 LZ for nitrogen up to 400 ° C, the ammonia is 10 L / min, and the nitrogen is only 40 ° C to room temperature.
- the activation rate can be maintained at 7% or more even when the operation is performed at 0 L.
- the heat treatment for 1 minute can further increase the carrier concentration of the P-type layer 506, and realizes a 2 xlO 1 'cnT 3 P-type crystal. We were able to .
- Ni was set to 20 nm
- gold was set to 400 nm (510 in the figure)
- a well-known vacuum evaporation method and a sputtering method were used.
- the electrode for the N-type layer 504 was formed to have a Ti of 200 nm and a gold of 400 nm (511 in the figure).
- the electrodes for the P-type layer include the Ni / Au laminated structure, the single layer of Pd, Ti, Pt, and In, or Ni and Au. A laminated structure or alloy is also possible.
- As the electrode for the N-type layer in addition to T i and A u, a single layer of A 1 and 1 n, or a laminated structure or alloy containing T i and A u is also possible. You.
- a protective film such as SiO 2 was formed on the P-type electrode 5 10 to complete the formation of the device.
- the light emitting diode has been described.
- the gist of the present invention is the manufacturing process of the P-type layer, Ga is not deviated from the gist unless the gist is deviated.
- Semiconductor lasers using N-type are also possible.
- a gallium nitride-based semiconductor buffer layer 702 As shown in FIG. 5, on a sapphire substrate 701, a gallium nitride-based semiconductor buffer layer 702, a gallium nitride-based N -Type semiconductor contact layer 703, gallium nitride-based N-type semiconductor layer 704, gallium nitride-based N-type semiconductor clad layer 7.0
- gallium nitride-based semiconductor active layer layer 706 gallium nitride-based semiconductor active layer 706. gallium nitride-based P-type semiconductor clad layer 707, gallium nitride-based P-type semiconductor layer 708, gallium nitride A lithium-based P-type semiconductor layer 709 and a gallium nitride-based P-type semiconductor contact layer 710 are stacked.
- the negative portion is formed by the reactive ion etching method until the gallium nitride-based N-type semiconductor contact layer 703 appears on the surface.
- ⁇ -type electrode formed by laminating Ti, Au, Ti, and Au in this order from below on the exposed surface. 200 £ m, 4
- the thicknesses of the P-type electrodes 71 1, which are 200 ⁇ m, 400 A, and 200 Um ⁇ 1 ⁇ m, respectively, are the lower forces, Pd, T i , P t, and T i may be stacked in this order.
- the thicknesses are 200 m ⁇ 4 m and 400 m, respectively.
- Gallium nitride-based semiconductor used for the gallium nitride-based semiconductor active layer 706 includes In (x) G a (l
- the other gallium nitride-based semiconductor layers are based on GaN, and the thickness is, for example, a sapphire substrate.
- Buffer layer 70 2 force ⁇ 50 ⁇ A
- gallium nitride-based N-type semiconductor contact layer 70 3 force m gallium nitride-based N-type semiconductor layer m
- gallium nitride-based N-type semiconductor cladding layer 705 ⁇ 0.2 m
- the impurity concentration is, for example, nitride gas re U beam based N-type semiconductor material co te click coat layer 7 0 3 Chikaraku 2 XloiocnT 3 nitride gas re U beam system N-type semiconductor layer 7 0 4 5 x10 17 cnT 3 , Gallium nitride based N-type semiconductor cladding layer 705 is 5 xl0 17 cm " 3.
- Gallium nitride based P-type semiconductor cladding layer 707 is 5 xl0 17 cnT 3, nitride gas re U beam based P-type semiconductor layer 7 0 8 5 x10 17 cnt 3, nitride gas re U beam based P-type semiconductor layer 7 0 9 3 X 10 1 ° cm- 3, nitride gas re ⁇ beam System P-type semiconductor contact layer 7 10 is 2 xl0 19 cm _3
- the reactive ion etching is performed up to the gallium nitride-based N-type semiconductor contact layer 703.
- Etching is performed by the etching method, and the GaN layer, which has been made high resistance by Zn, is buried in the etched portion.
- the resonance portion may be limited.
- Figure 6 shows such a structure.
- the high resistance G a N layer 8 0 0 In here, X 1 0 1 8 cm " 3 of Z n is that introduces.
- the manufacturing process is simplified, and the yield is improved.
- a gallium nitride-based compound semiconductor blue light-emitting device having high emission intensity and low power consumption can be realized.
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19680872T DE19680872B4 (de) | 1995-08-31 | 1996-08-30 | Verfahren zur Herstellung eines Licht emittierenden Elements |
US08/817,159 US6258617B1 (en) | 1995-08-31 | 1996-08-30 | Method of manufacturing blue light emitting element |
EP96928701A EP0805500A4 (en) | 1995-08-31 | 1996-08-30 | BLUE LIGHT-EMITTING DEVICE AND PRODUCTION METHOD |
KR1019970702866A KR100326101B1 (ko) | 1995-08-31 | 1996-08-30 | 반도체장치의제조방법및질화갈륨계반도체의성장방법 |
GB9708875A GB2310083B (en) | 1995-08-31 | 1996-08-30 | Blue light emitting element and method of manufacturing same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22399395 | 1995-08-31 | ||
JP7/223993 | 1995-08-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997008759A1 true WO1997008759A1 (fr) | 1997-03-06 |
Family
ID=16806911
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1996/002434 WO1997008759A1 (fr) | 1995-08-31 | 1996-08-30 | Dispositif emetteur de lumiere bleue et son procede de fabrication |
Country Status (7)
Country | Link |
---|---|
US (1) | US6258617B1 (ja) |
EP (1) | EP0805500A4 (ja) |
KR (1) | KR100326101B1 (ja) |
CN (1) | CN1132253C (ja) |
DE (1) | DE19680872B4 (ja) |
GB (1) | GB2310083B (ja) |
WO (1) | WO1997008759A1 (ja) |
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- 1996-08-30 EP EP96928701A patent/EP0805500A4/en not_active Withdrawn
- 1996-08-30 DE DE19680872T patent/DE19680872B4/de not_active Expired - Fee Related
- 1996-08-30 GB GB9708875A patent/GB2310083B/en not_active Expired - Fee Related
- 1996-08-30 US US08/817,159 patent/US6258617B1/en not_active Expired - Fee Related
- 1996-08-30 WO PCT/JP1996/002434 patent/WO1997008759A1/ja not_active Application Discontinuation
- 1996-08-30 KR KR1019970702866A patent/KR100326101B1/ko not_active IP Right Cessation
- 1996-08-30 CN CN96191004A patent/CN1132253C/zh not_active Expired - Fee Related
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US20140077157A1 (en) * | 1997-07-25 | 2014-03-20 | Nichia Corporation | Nitride semiconductor device |
Also Published As
Publication number | Publication date |
---|---|
GB2310083B (en) | 1999-07-28 |
KR970707594A (ko) | 1997-12-01 |
CN1132253C (zh) | 2003-12-24 |
GB9708875D0 (en) | 1997-06-25 |
EP0805500A1 (en) | 1997-11-05 |
EP0805500A4 (en) | 2001-10-24 |
DE19680872T1 (de) | 1997-10-16 |
CN1164934A (zh) | 1997-11-12 |
US6258617B1 (en) | 2001-07-10 |
KR100326101B1 (ko) | 2002-10-09 |
GB2310083A (en) | 1997-08-13 |
DE19680872B4 (de) | 2009-01-08 |
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