WO2017073759A1 - 発光素子、受発光素子モジュールおよび光学式センサ - Google Patents
発光素子、受発光素子モジュールおよび光学式センサ Download PDFInfo
- Publication number
- WO2017073759A1 WO2017073759A1 PCT/JP2016/082141 JP2016082141W WO2017073759A1 WO 2017073759 A1 WO2017073759 A1 WO 2017073759A1 JP 2016082141 W JP2016082141 W JP 2016082141W WO 2017073759 A1 WO2017073759 A1 WO 2017073759A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light emitting
- active layers
- electrodes
- light
- emitting element
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 title claims description 27
- 239000004065 semiconductor Substances 0.000 claims abstract description 74
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 7
- 239000000758 substrate Substances 0.000 description 41
- FTWRSWRBSVXQPI-UHFFFAOYSA-N alumanylidynearsane;gallanylidynearsane Chemical compound [As]#[Al].[As]#[Ga] FTWRSWRBSVXQPI-UHFFFAOYSA-N 0.000 description 12
- 239000012535 impurity Substances 0.000 description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 9
- 238000005253 cladding Methods 0.000 description 9
- 229910052710 silicon Inorganic materials 0.000 description 9
- 239000010703 silicon Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 4
- 239000010931 gold Substances 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- 239000011669 selenium Substances 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229920005668 polycarbonate resin Polymers 0.000 description 3
- 239000004431 polycarbonate resin Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920006122 polyamide resin Polymers 0.000 description 2
- 229910052711 selenium Inorganic materials 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 229910002711 AuNi Inorganic materials 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229920000106 Liquid crystal polymer Polymers 0.000 description 1
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
Images
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
- H01L33/36—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 electrodes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
- H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
- H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
- H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/12—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof structurally associated with, e.g. formed in or on a common substrate with, one or more electric light sources, e.g. electroluminescent light sources, and electrically or optically coupled thereto
-
- 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
- H01L33/08—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 plurality of light emitting regions, e.g. laterally discontinuous light emitting layer or photoluminescent region integrated within the semiconductor body
-
- 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
- H01L33/48—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 body packages
- H01L33/58—Optical field-shaping elements
- H01L33/60—Reflective elements
-
- 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
- H01L33/48—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 body packages
- H01L33/62—Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
Definitions
- the present invention relates to a light emitting element, a light emitting / receiving element module, and an optical sensor.
- LED light emitting element
- Japanese Patent Application Laid-Open No. 2007-281426 proposes to use an anode electrode that is elongated in the upper surface of a light emitting element in order to improve unevenness of light emission (Patent Document). 1).
- a light emitting device includes at least one first semiconductor layer having one conductivity type, a plurality of active layers stacked on the first semiconductor layer, and the plurality of active layers.
- a plurality of second semiconductor layers which are stacked and have another conductivity type, and a plurality of electrodes connected to the first semiconductor layer and the second semiconductor layer are provided.
- a part of the plurality of electrodes is opposed to each other across the plurality of active layers, and another part of the plurality of electrodes is located in a region between the parts.
- FIG. 2 is a top view of the light emitting element shown in FIG. 1. It is a top view which shows the light emitting element concerning one Embodiment of this invention.
- FIG. 4 is a top view showing a part of the light emitting element shown in FIG. It is a top view which shows the light emitting element concerning one Embodiment of this invention.
- FIG. 6 is a top view showing a part of the light emitting element shown in FIG. It is a top view which shows the light emitting element concerning one Embodiment of this invention.
- FIG. 8 is a top view illustrating a part of the light emitting device illustrated in FIG.
- FIG. 7 It is sectional drawing when the light emitting element shown in FIG. 7 is cut
- FIG. 13 is a top view showing a part of the light emitting element shown in FIG. It is sectional drawing when the light emitting / receiving element module concerning one Embodiment of this invention is cut
- the light emitting element 1 can emit light when a current flows. As shown in FIG. 1, the light emitting element 1 includes a plurality of semiconductor layers 2 and a plurality of electrodes 3 electrically connected to the plurality of semiconductor layers 2. As a result, the light emitting element 1 can emit a part of the plurality of semiconductor layers 2 by applying a voltage to the plurality of semiconductor layers 2 using the plurality of electrodes 3.
- FIG. 1 shows a part of a cross section when the light emitting element 1 in FIG. 2 is cut along the line II.
- the light emitting element 1 is supported by the substrate 4.
- the substrate 4 is, for example, a semiconductor substrate.
- the material of the substrate 4 is, for example, silicon (Si) or gallium arsenide (GaAs).
- the substrate 4 can be formed by, for example, slicing a silicon (Si) ingot into a wafer.
- the substrate 4 in this example is a silicon (Si) substrate.
- the plurality of semiconductor layers 2 of the light emitting element 1 are stacked on the substrate 4.
- the plurality of semiconductor layers 2 are stacked on the buffer layer 5 stacked on the top surface of the substrate 4, the first semiconductor layer 6 stacked on the top surface of the buffer layer 5, and the top surface of the first semiconductor layer 6.
- the active layer 7 has a second semiconductor layer 8 stacked on the upper surface of the active layer 7.
- the first semiconductor layer 6 has one conductivity type, and the second semiconductor layer 8 has another conductivity type.
- the planar shape of each of the plurality of semiconductor layers 2 may be a rectangular shape, for example.
- the plurality of electrodes 3 of the light emitting element 1 include at least one first electrode 9 and at least one second electrode 10.
- the first electrode 9 is connected to the first semiconductor layer 6, and the second electrode 10 is connected to the second semiconductor layer 8.
- an insulating layer 11 may be disposed on the surfaces of the plurality of semiconductor layers 2 except for the connection portions with the plurality of electrodes 3 for the purpose of preventing a short circuit between the plurality of electrodes 3.
- the insulating layer 11 may be disposed on the upper surface of the substrate 4.
- the plurality of electrodes 3 may be, for example, gold (Au) or aluminum (Al).
- the insulating layer 11 may be, for example, silicon nitride (SiN) or silicon dioxide (SiO 2 ).
- one conductivity type is assumed to be n-type, and the other conductivity type is assumed to be p-type.
- one conductivity type may be p-type and the other conductivity type may be n-type.
- the buffer layer 5 can buffer the difference in lattice constant between the substrate 4 and the plurality of semiconductor layers 2. As a result, lattice defects or crystal defects in the entire semiconductor layer 2 can be reduced.
- the buffer layer 5 may be, for example, gallium arsenide (GaAs).
- the first semiconductor layer 6 includes a first contact layer 12 stacked on the upper surface of the buffer layer 5 and a first cladding layer 13 stacked on a part of the upper surface of the first contact layer 12. Yes.
- the first electrode 9 of the present embodiment is a cathode electrode and is disposed on the other part of the upper surface of the first contact layer 12.
- the active layer 7 is disposed on the upper surface of the first cladding layer 13.
- the first contact layer 12 can reduce electrical contact resistance with the first electrode 9.
- the first contact layer 12 may be formed by doping n-type impurities into gallium arsenide (GaAs).
- the n-type impurity for gallium arsenide (GaAs) may be, for example, silicon (Si) or selenium (Se).
- the first cladding layer 13 can confine holes in the active layer 7.
- the first cladding layer 13 may be formed, for example, by doping an aluminum gallium arsenide (AlGaAs) with an n-type impurity.
- AlGaAs aluminum gallium arsenide
- the n-type impurity for aluminum gallium arsenide (AlGaAs) may be, for example, silicon (Si) or selenium (Se).
- the active layer 7 can emit light when electrons and holes are concentrated and they are recombined.
- the active layer 7 may be, for example, aluminum gallium arsenide (AlGaAs).
- the second semiconductor layer 8 has a second cladding layer 14 stacked on the upper surface of the active layer 7 and a second contact layer 15 stacked on the upper surface of the second cladding layer 14.
- the second electrode 10 of the present embodiment is an anode electrode and is disposed on the upper surface of the second contact layer 15.
- the second cladding layer 14 can confine electrons in the active layer 7.
- the second cladding layer 14 may be formed by doping p-type impurities into aluminum gallium arsenide (AlGaAs), for example.
- the p-type impurity for aluminum gallium arsenide (AlGaAs) may be, for example, zinc (Zn) or magnesium (Mg).
- the second contact layer 15 can reduce electrical contact resistance with the second electrode 10.
- the second contact layer 15 may be formed, for example, by doping aluminum gallium arsenide (AlGaAs) with a p-type impurity.
- AlGaAs aluminum gallium arsenide
- the second contact layer 15 is set to have a higher carrier density than the second cladding layer 14 in order to reduce the contact resistance with the electrode.
- the light emitting element 1 can be formed by the following method, for example. First, a plurality of semiconductor layers 2 are formed by sequentially epitaxially growing on the upper surface of the substrate 4 using, for example, a MOCVD (Metal Organic Chemical Vapor Deposition) method. Next, the insulating layer 11 is formed on the surfaces of the plurality of semiconductor layers 2 by using, for example, a P-CVD (Plasma Chemical Vapor Deposition) method. Next, the plurality of electrodes 3 are formed on a part of the semiconductor layers of the plurality of semiconductor layers 2 using, for example, vapor deposition, sputtering, plating, or the like. The light emitting element 1 can be formed by the above method.
- MOCVD Metal Organic Chemical Vapor Deposition
- the light-emitting element 1 includes a plurality of first semiconductor layers 6 arranged in the first direction D ⁇ b> 1 and a plurality of layers stacked on the plurality of first semiconductor layers 6. Active layer 7 and a plurality of second semiconductor layers 8 stacked on the plurality of active layers 7.
- the light emitting element 1 further includes a plurality of first electrodes 9, and the plurality of first electrodes 9 are disposed between the plurality of active layers 7.
- a plurality of second electrodes 10 are arranged on the plurality of second semiconductor layers 8.
- FIG. 2 shows a configuration excluding the insulating layer 11.
- At least one second electrode 10 has a plurality of second electrodes 10 and is opposed to each other.
- a plurality of active layers 7 are located in a region between the plurality of second electrodes 10.
- the plurality of second electrodes 10 of the present embodiment are routed from one place and bent in the middle, and as a result, face each other.
- the plurality of active layers 7 are located in a region where the plurality of second electrodes 10 face each other (region between the plurality of second electrodes 10).
- the cause of uneven light emission is that current diffusion becomes non-uniform.
- the light emission unevenness of the light emitting element is caused by the length of the anode electrode. Therefore, the current passes through the plurality of semiconductor layers toward the cathode electrode for the first time at the tip of the anode electrode, with priority given to the anode electrode having a lower electrical resistance than the p-type semiconductor layer, and only the corresponding part emits light. It is guessed.
- the light-emitting element 1 of the present disclosure has the above-described configuration.
- some of the plurality of electrodes 3 face each other across the plurality of active layers 7, and the other part of the plurality of electrodes (the plurality of first electrodes 9). Is located in a region between a part of the plurality of electrodes 3 (a plurality of second electrodes 10).
- the plurality of active layers 7 and the first electrodes 9 are located in the facing region A where the plurality of second electrodes 10 are opposed to each other.
- the light emitting element 1 unevenness of light emission as a whole of the single light emitting element 1 composed of the plurality of active layers 7 can be reduced. That is, by dividing the active layer 7 of the light-emitting element 1 and disposing the second electrode 10 in each of the divided active layers 7 (a plurality of active layers 7), each of the divided active layers 7 can be effectively used. Can emit light. As a result, light emission unevenness of the light emitting element 1 can be reduced.
- the light emitting element 1 of the present embodiment has two second semiconductor layers 8 and has two active layers 7 corresponding to the two second semiconductor layers 8. .
- the active layer 7 is divided into two.
- the area that is effectively utilized out of the total area of the plurality of active layers 7 can be approximately double that of the case where the active layer 7 is not divided, and the ratio of the dark part of the light-emitting element 1 is reduced, and the light emission unevenness is reduced. can do.
- light emission unevenness means that light emission appears uneven when the light emission surface of the light emitting element 1 is viewed. For example, a part of the light emission surface of the light emitting element 1 emits light compared to other parts. It means having a dark part with low intensity. “Improving light emission unevenness” means that the above-described dark portion ratio is reduced and light emission approaches uniformly.
- the first electrode 9 is disposed between the plurality of active layers 7.
- the current density in the center part of the light emitting element 1 can be enlarged, and the emitted light intensity of a center part can be improved. Accordingly, light is not emitted between the plurality of active layers 7, but light emission unevenness of the entire light emitting element 1 can be reduced by improving light emission intensity in a region including between the plurality of active layers 7.
- the plurality of first electrodes 9 are straight in the region between the plurality of active layers 7. As a result, the current diffusion between the first electrode 9 and the second electrode 10 can be easily made uniform, and light emission unevenness can be reduced.
- the plurality of second electrodes 10 further includes a plurality of main portions 10 a extending along the extending direction of the first electrode 9, and extends from the plurality of main portions 10 a toward the first electrode 9. And a plurality of extending portions 10b.
- the current density can be increased between the tips of the plurality of extending portions 10 b and the first electrode 9.
- the 2nd electrode 10 has the main part 10a and the extension part 10b, a part of several electrode 3 which opposes on both sides of several active layer 7 is one end part of several main part 10a. Point to each other.
- the plurality of main parts 10 a may be arranged on the substrate 4.
- the plurality of main portions 10 a may not be connected to the plurality of semiconductor layers 2.
- the regions of the plurality of second electrodes 10 located on the plurality of second semiconductor layers 8 can be reduced, and the light emission unevenness of the light emitting element 1 can be reduced.
- the plurality of main portions 10 a may be disposed on the upper surface of the substrate 4 via the insulating layer 11.
- each of the plurality of extending portions 10b may be smaller than the width of each of the plurality of main portions 10a.
- the first electrode pad 16 and the second electrode pad 17 are disposed on the substrate 4.
- the first electrode 9 is connected to the first electrode pad 16, and the plurality of second electrodes 10 are connected to the second electrode pad 17 and are electrically connected.
- the plurality of electrodes 3 may include a plurality of first electrodes 9 or a plurality of second electrodes 10, and all or a plurality of second electrodes of the plurality of first electrodes 9. All of 10 may be connected to the first electrode pad 16 or the second electrode pad 17.
- a plurality of active layers 7 can be operated at the same time, and the plurality of active layers 7 can easily function as one light emitting element 1.
- the plurality of active layers 7 are connected in parallel. That is, the increase in junction temperature can be reduced, and the applied current can be increased. Thereby, the light emitting element 1 which has high light emission intensity can be provided.
- a plurality of first electrode pads 16 or a plurality of second electrode pads 17 may be disposed on the upper surface of the substrate 4.
- the plurality of electrodes 3 include the plurality of first electrodes 9 or the plurality of second electrodes 10, and the plurality of first electrodes 9 or the plurality of second electrodes 10 are respectively connected to the plurality of first electrodes.
- the pad 16 or the plurality of second electrode pads 17 may be connected to each other.
- each of the plurality of first electrodes 9 or the plurality of second electrodes 10 may be electrically independent.
- some of the active layers 7 among the plurality of active layers 7 can be illuminated, or the plurality of active layers 7 can be illuminated sequentially. Therefore, the light emitting element 1 can be used properly according to the application.
- the insulating layer 11 When the insulating layer 11 is disposed on the upper surface of the substrate 4, the first electrode pad 16, the second electrode pad 17, and the plurality of electrodes 3 disposed on the upper surface of the substrate 4 are connected to the substrate 4. An insulating layer 11 may be interposed therebetween.
- the first electrode pad 16 and the second electrode pad 17 are, for example, AuNi in which gold (Au) or aluminum (Al) is combined with nickel (Ni), chromium (Cr), or titanium (Ti) as an adhesion layer.
- AuCr, AuTi, AlCr alloy or the like may be used.
- Second Embodiment 3 and 4 are top views of the light emitting device 1A of the second embodiment.
- FIG. 3 shows a configuration excluding the insulating layer 11.
- 4 shows the arrangement of the plurality of active layers 7 from the light emitting element 1A shown in FIG. 3 to the second semiconductor layer 8, the first electrode 9A, the plurality of second electrodes 10, and the first electrode pad.
- the configuration excluding 16 and the second electrode pad 17 is shown.
- the light emitting element 1A is different from the other embodiments in that it includes one first semiconductor layer 6A and one first electrode 9A.
- the plurality of active layers 7 share the first electrode 9A with each other. More specifically, one buffer layer 5 ⁇ / b> A and one first contact layer 12 ⁇ / b> A common to the plurality of active layers 7 are provided on the substrate 4.
- the light emitting element 1A can bring the plurality of active layers 7 close to each other by having the above-described configuration. As a result, it is possible to reduce a decrease in light emission intensity at the central portion of the light emitting element 1A.
- the plurality of extending portions 10b of the plurality of second electrodes 10 may be positioned symmetrically about the first electrode 9A. As a result, light emission unevenness of the light emitting element 1A can be reduced.
- FIG. 5 and 6 are top views of the light emitting device 1B according to the third embodiment.
- FIG. 5 shows a configuration excluding the insulating layer 11.
- 6 shows the arrangement of the plurality of active layers 7B, from the light emitting element 1B shown in FIG. 5 to the second semiconductor layer 8, the plurality of first electrodes 9, the plurality of second electrodes 10B, and the first electrode.
- the configuration excluding the pad 16 and the second electrode pad 17 is shown.
- the light emitting element 1B includes a plurality of first active layers 71B in which a plurality of active layers 7B are arranged in the first direction D1, and a second direction D2 perpendicular to the first direction D1 with respect to the plurality of first active layers 71B. It differs from other embodiment by the point which has several 2nd active layer 72B arrange
- the plurality of second active layers 72B are arranged in the first direction D1. In other words, the light emitting element 1B has a plurality of active layers 7B arranged in a matrix.
- the light emitting element 1B has a plurality of first electrodes 9 and a plurality of second electrodes 10B as the plurality of electrodes 3B.
- the plurality of first electrodes 9 may be disposed on the central portion side of the structure formed by an assembly of the plurality of active layers 7B.
- the plurality of second electrodes 10B only need to be arranged outside the structure. As a result, it is possible to provide the light-emitting element 1B in which the occurrence of unevenness in light emission is reduced and the decrease in the light emission intensity at the center of the element is suppressed even when the light-emitting area is increased.
- the plurality of second electrodes 10B have a plurality of extending portions 10Bb corresponding to the number of the plurality of active layers 7B.
- One first electrode may be arranged instead of the plurality of first electrodes 9.
- the distance between the plurality of first active layers 71B is larger than the distance between the plurality of first active layers 71B and the plurality of second active layers 72B. As a result, the non-light emitting region of the light emitting element 1B can be reduced, and uneven light emission can be reduced.
- the plurality of first electrodes 9 may not be disposed between the plurality of first active layers 71B and the plurality of second active layers 72B. As a result, the distance between the plurality of first active layers 71B and the plurality of second active layers 72B can be effectively reduced.
- the plurality of first electrodes 9 may intersect with virtual lines extending from the tips of the plurality of extending portions 10Bb of the plurality of second electrodes 10B in the longitudinal direction of the plurality of extending portions 10Bb. As a result, light emission unevenness of the light emitting element 1B can be reduced.
- two rows are arranged along the second direction, but three or more rows may be arranged.
- FIG. 7 shows a configuration excluding the substrate 4 and the insulating layer 11.
- 8 shows the arrangement of the plurality of active layers 7C from the light emitting element 1C shown in FIG. 7 to the second semiconductor layer 8C, the first electrode 9C, the plurality of second electrodes 10C, and the first electrode pads.
- the configuration excluding 16 and the second electrode pad 17 is shown.
- FIG. 9 is a cross-sectional view of the light emitting element 1C shown in FIG. 7 cut along the line IX-IX in FIG.
- each light emitting element 1C has a plurality of active layers 7C each having a triangular shape. Further, the plurality of active layers 7C are arranged so that their sides face each other in a top view, and the plurality of active layers 7C as a whole form a rhombus.
- the plurality of second semiconductor layers 8C also have a triangular planar shape.
- the plurality of first semiconductor layers 6C also have a triangular planar shape. Note that these planar shapes need not be limited to triangles.
- the plurality of electrodes 3C include a plurality of first electrodes 9C and second electrodes 10C.
- the plurality of first electrodes 9C are arranged to surround the periphery of the plurality of active layers 7C.
- the second electrode 10C includes a main portion 10Ca disposed between the plurality of active layers 7C and an extending portion 10Cb extending from the top of each of the plurality of second semiconductor layers 8C. is doing.
- FIG. 10 and 11 are top views of the light emitting device 1D of the fifth embodiment.
- FIG. 10 shows a configuration excluding the substrate 4 and the insulating layer 11.
- FIG. 11 shows the arrangement of the plurality of active layers 7D from the light emitting element 1D shown in FIG. The configuration excluding 16 and the second electrode pad 17 is shown.
- the light emitting element 1D includes a plurality of first active layers along a plurality of first active layers 71D in which a plurality of active layers 7D are arranged in the first direction D1 and a second direction D2 orthogonal to the first direction D1. It is different from the other embodiments in that it has a plurality of second active layers 72D arranged so as to sandwich 71D.
- the plurality of electrodes 3D include a plurality of first electrodes 9D and a plurality of second electrodes 10D.
- the plurality of first electrodes 9D and the plurality of second electrodes 10D are arranged so as to sandwich the plurality of first active layers 71D.
- the plurality of first active layers 7D can be arranged with high density.
- FIG. 12 shows a configuration excluding the substrate 4 and the insulating layer 11.
- 13 shows the arrangement of the plurality of active layers 7 from the light emitting element 1E shown in FIG. 12 to the second semiconductor layer 8, the first electrode 9E, the plurality of second electrodes 10E, and the first electrode pad.
- the configuration excluding 16 and the second electrode pad 17 is shown.
- the plurality of electrodes 3E includes a plurality of first electrodes 9E and a plurality of second electrodes 10E.
- One of the plurality of first electrodes 9E and one of the plurality of second electrodes 10E sandwich the plurality of active layers 7E.
- another implementation is that the other one of the plurality of first electrodes 9E and the other one of the plurality of second electrodes 10E are disposed between the plurality of active layers 7.
- the light emitting element 1E is in a region between a part of the plurality of electrodes 3E (one of the plurality of first electrodes 9E and one of the plurality of second power countries 10E). It has a plurality of active layers 7 and another part of the plurality of electrodes 3E (the other one of the plurality of first electrodes 9E and the other one of the plurality of second electric countries 10E).
- FIG. 14 shows an outline of the light emitting / receiving element module 18.
- the light emitting / receiving element module 18 includes the light emitting element 1, the light receiving element 19, and the wiring board 20 on which the light emitting element 1 and the light receiving element 19 are mounted.
- the light emitting / receiving element module 18 can sense the irradiated object by irradiating the irradiated object (not shown) with light from the light emitting element 1 and receiving the reflected light from the irradiated object with the light receiving element 19. it can. Therefore, as described later, the light emitting / receiving element module 18 is incorporated in an image forming apparatus such as a copier or a printer, and detects position information, distance information, density information, or the like of an irradiated object such as toner or media. can do.
- the light receiving element 19 is formed on the substrate 4 supporting the light emitting element 1.
- the substrate 4 according to the present embodiment is made of one conductivity type semiconductor material.
- an n-type silicon (Si) substrate is used as the substrate 4, for example, an n-type silicon (Si) substrate is used. That is, the substrate 4 is a silicon (Si) substrate doped with n-type impurities.
- the n-type impurity for the silicon (Si) substrate is, for example, phosphorus (P) or nitrogen (N).
- the light receiving element 19 is formed by providing a semiconductor region 21 of another conductivity type in a region away from the light emitting element 1 on the upper surface of the substrate 4. That is, the pn junction is formed by forming the semiconductor region 21 of another conductivity type on the substrate 4 of one conductivity type, and the light emitting element 19 is configured.
- the other conductivity type semiconductor region 21 can be formed by doping the substrate 4 with p-type impurities. Since the substrate 4 of this example is a silicon (Si) substrate, examples of p-type impurities include boron (B), zinc (Zn), and magnesium (Mg).
- the planar shape of the semiconductor region 21 is, for example, a polygonal shape or a circular shape. Desirably, as shown in FIG. 17, the semiconductor region 21 may be circular. Particularly desirably, the semiconductor region 21 may be a perfect circle.
- the planar shape of the semiconductor region 21 refers to the shape of the outer edge of the semiconductor region 21 when the upper surface of the substrate 4 is viewed.
- a waveform in which an output waveform of a current value of the light receiving element 19 is set in advance. May be registered.
- the planar shape of the semiconductor region 21 is a polygonal shape, the position of the corner in the planar shape of the semiconductor region 21 may be shifted due to manufacturing variations.
- the registration mark may be deviated. .
- the planar shape of the semiconductor region 21 is a circular shape (particularly a perfect circle), the axis extending in the normal direction of the substrate 4 from the central portion of the semiconductor region 21 as compared with the rectangular shape. It is possible to reduce the manufacturing variation in the rotation direction when using as the rotation axis. Therefore, the registration accuracy can be improved.
- the size of the light receiving element 19 may be smaller than the irradiated object. That is, the plane area of the light receiving element 19 is smaller than the plane area of the irradiated object.
- the size of the registration mark is generally 2 mm or more and 15 mm or less
- the size of one side of the light receiving element 19 is For example, it is set to 0.5 mm or more and 10 mm or less.
- the planar shape of the light emitting element 1 may be circular, and the following light passing part 26 may be circular. Further, the diameter in the case where the light emitting element 1 or the light passing portion 26 is circular is set to a size approximately equal to one side of the light receiving element.
- the area of the upper surface of the active layer 7 located on the light receiving element 19 side is smaller than the area of the upper surface of the other active layer 7. Also good.
- the light emitting element 1B shown in FIG. 6 will be described as an example.
- the area of the upper surface of the second active layer 72B located on the light receiving element 19 side is smaller than the area of the upper surface of the first active layer 71A located on the opposite side. May be.
- the light emitted from the second active layer 72B (hereinafter referred to as a plurality of third active layers 7X) positioned on the light receiving element 19 side and the first active layer 71A (
- the optical path length is different from the light emitted from the plurality of fourth active layers 7Y)
- the irradiation area when reaching the irradiation object is different.
- a difference between the output waveform at the rise and the output waveform at the fall of the current value of the light receiving element 19 is likely to occur, and for example, the registration accuracy is likely to be lowered.
- the area of the spot on the irradiated object can be made closer, for example, the accuracy of registration can be improved.
- magnification K
- projection distance L
- incident angle ⁇
- the irradiation area (A 1 ) of light emitted from the plurality of fourth active layers 7Y is, for example, the area of the upper surface of each of the plurality of fourth active layers 7Y being A 0, and the magnification at the irradiated object is K,
- the projection distance is L and the incident angle is ⁇ , it can be expressed by the following mathematical formula.
- the difference between the irradiation area (A 2 ) of light emitted from the plurality of third active layers 7X and the irradiation area (A 1 ) of light emitted from the plurality of fourth active layers 7Y can be expressed by the following mathematical formula. .
- the irradiation area (A 2 ) of light emitted from the plurality of third active layers 7X is larger than the irradiation area (A 2 ) of light emitted from the plurality of fourth active layers 7Y by the amount of the above formula (3).
- the area of the upper surface of each of the layers 7X is the amount of the following equation (4) obtained by dividing the magnification of the irradiated object (K) by the equation (3) from the area of the upper surface of each of the plurality of fourth active layers 7. Only need to be small.
- the area of the upper surface of each of the plurality of third active layers 7X or the area of the upper surface of each of the plurality of fourth active layers 7 is set to, for example, 9 ⁇ 10 ⁇ 10 m 2 or more and 2.5 ⁇ 10 ⁇ 5 m 2 or less. Is done.
- the area of the spot light is set to, for example, 2.25 ⁇ 10 ⁇ 8 m 2 or more and 4 ⁇ 10 ⁇ 6 m 2 or less.
- the area of the upper surface of each of the plurality of third active layers 7X is set to be 0.1 times or more and 0.99 times or less of the area of each upper surface of the plurality of fourth active layers 7.
- the second active layer 72B located on the light receiving element 19 side is expressed as “a plurality of third active layers 7X”.
- the plurality of third active layers 7X “Means” the active layer 7 located on the light receiving element 19 side among the plurality of active layers 7 ". That is, the plurality of third active layers 7X may include only the plurality of first active layers 71A, may include the plurality of second active layers 72B, and may include the first active layer 71A and the second active layer 72B. It may be.
- the plurality of fourth active layers 7Y are also interpreted in the same manner as the plurality of third active layers 7X.
- the distance between the plurality of third active layers 7X and the distance between the plurality of fourth active layers 7Y be approximately the same. It becomes easy to make the light quantity distribution in the center of the light emitting element 1B uniform.
- the plurality of fourth active layers 7Y may have a size along a third direction D3 of a later-described transporter 32 smaller than a size along a fourth direction D4 orthogonal to the third direction D3.
- the wiring board 20 is formed in a rectangular shape, for example.
- a resin substrate or a ceramic substrate can be used as the wiring substrate 20, for example.
- the wiring board 20 according to the present embodiment is a resin board.
- the wiring board 20 can be formed by a conventionally known method.
- the light emitting / receiving element module 18 further includes a light shield 22 and a lens member 23.
- the light blocking body 22 has a function of blocking stray light so that the light receiving element 19 does not receive unintended light (stray light) from the outside, for example.
- the lens member 23 has a function of guiding light from the light emitting element 1 to the irradiated object and guiding reflected light from the irradiated object to the light receiving element 19.
- the light shield 22 is arranged so as to cover a frame-like wall portion 24 surrounding the light emitting element 1 and the light receiving element 19 and an area provided on the inner surface of the wall portion 24 and surrounded by the wall portion 24. And a lid portion 25.
- the light emitting element 1 and the light receiving element 19 are accommodated in a region surrounded by the inner surface of the wall portion 24 and the lower surface of the lid portion 25.
- the light shield 22 has a plurality of light passage portions 26 through which the light from the light emitting element 1 passes.
- the light passage part 26 concerning this embodiment is formed of the some hole.
- the material of the light shield 22 is, for example, a resin material such as polypropylene resin (PP), polyamide resin (PA), polycarbonate resin (PC), or liquid crystal polymer, or a metal material such as aluminum (Al) or titanium (Ti). .
- the light shield 22 is formed by, for example, injection molding.
- the lens member 23 has a lens part 27 through which light passes and a support part 28 that supports the lens part 27.
- the lens member 23 is fitted in a region surrounded by the inner surface of the wall portion 24 of the light shielding body 22 and the upper surface of the lid portion 25 via the support portion 28.
- the lens member 23 is formed of a translucent material.
- the material of the lens member 23 is, for example, a resin material such as silicone resin, epoxy resin, or polycarbonate resin, or sapphire and inorganic glass.
- the lens member 23 is formed by, for example, injection molding.
- the lens unit 27 has a function of collecting and guiding the light emitted from the light emitting element 1 and the reflected light from the irradiated object.
- the lens unit 27 includes a first lens 29 that condenses the light emitted from the light emitting element 1 and a second lens 30 that condenses the reflected light from the irradiated object.
- Each of the first lens 29 and the second lens 30 according to the present embodiment is, for example, a convex lens, a spherical lens, or an aspheric lens.
- the support portion 28 has a function of holding the lens portion 27.
- the support part 28 is formed in a plate shape, for example.
- the support portion 28 may be formed integrally with the lens portion 27 to hold the lens portion 27, and the first lens 29 and the second lens 30 of the lens portion 27 are fitted into the support portion 28.
- the lens unit 27 may be held by
- FIG. 15 shows an outline of the optical sensor 31.
- the optical sensor 31 includes the light emitting / receiving element module 18 and a pedestal that faces the light emitting / receiving element module 18.
- the pedestal part supports the irradiated object.
- the optical sensor 31 may have a pedestal as an irradiated object.
- the transporter 32 is provided as a pedestal portion will be described.
- the transporter 32 has a function of transporting an object placed on the surface. Further, the surface (conveying surface) on which the object of the transporter 32 is placed faces the light emitting portion of the light receiving and emitting element module 18.
- the optical sensor 31 is mounted on, for example, an image forming apparatus such as a copying machine and a printer, a conveying apparatus such as a belt conveyor and a roller conveyor, an FA (Factory Automation) device, a scanner, or the like, and a moving object 33
- the position information of (irradiation object) is detected.
- the moving object 33 is a print sheet or the like when the image forming apparatus is taken as an example, and a transported object or the like when the transport device is taken as an example.
- the transport device 32 is a transfer belt when an image forming apparatus is taken as an example, and a transport belt when a transport device is taken as an example.
- the above-mentioned “may have a pedestal as an object to be irradiated” refers to a case where the surface state or the like of the transporter 32 itself is detected.
- the 1st direction D1 concerning this embodiment corresponds with the 3rd direction D3
- the 2nd direction D2 is orthogonal to the 3rd direction D3.
- the light emitting / receiving element module 18 has two active layers 7 arranged along the first direction D1.
- FIG. 16 is a graph showing an outline of fluctuations in the output value (current value) of the light receiving element 19 when the moving object 33 passes.
- the moving object 33 moves in the positive direction of the X axis in FIG. 15, and the horizontal axis of the graph in FIG. 16 corresponds to the X axis in FIG.
- the output of the light receiving element 19 starts to rise after the moving object 33 reaches the first active layer 7 (point P1 in FIG. 16).
- the inclination of the output increase of the light receiving element 19 is temporarily reduced.
- the inclination of the output increase of the light receiving element 19 becomes large again.
- the first electrode 9 is disposed between the plurality of active layers 7 and becomes a slight dark portion of the light emitting element 1. Therefore, the inclination of the output value of the light receiving element 19 when the moving object 33 passes between the plurality of active layers 7 is the output value of the light receiving element 19 when the moving object passes through each of the plurality of active layers 7. It becomes smaller than the slope of. In other words, if the slope of an output value of the light receiving element 19 is smaller than before and after, the moving object has passed between the plurality of active layers 7.
- the optical sensor 1 can grasp the position of the moving object 33 in small increments.
- the recognition position accuracy of 33 can be improved.
- the optical sensor 1 according to the present embodiment is mounted on an image forming apparatus, it is useful for color alignment in color matching.
- the light-emitting element 1 of the optical sensor 1 may include a plurality of first active layers 71A and a plurality of second active layers 72B.
- the moving object 33 having an oblique shape with respect to the second direction D2 passes over the plurality of active layers 7, and includes the plurality of first active layers 71A and the plurality of second active layers 72B.
- the plurality of first active layers 71A are the two first active layers 71A
- the plurality of second active layers 72B are the two second active layers 72B.
- outputs corresponding to the plurality of first active layers 71A (hereinafter referred to as first outputs) or outputs corresponding to the plurality of second active layers 72B (hereinafter referred to as second outputs).
- first outputs or outputs corresponding to the plurality of second active layers 72B
- second outputs are the same as the fluctuations in the output value described in FIG. If there is a difference between the first output and the second output, for example, if the second output is smaller than the first output, the moving object 33 has a plurality of first active layers 72B before the plurality of second active layers 72B. This means that it has reached the active layer 71A. On the other hand, for example, when the first main force is smaller than the second output, the moving object 33 has reached the plurality of second active layers 72B before the plurality of first active layers 71A.
- the optical sensor 1 includes the plurality of first active layers 71A and the plurality of second active layers 72B, thereby providing a fourth direction D4 (second direction in this example) orthogonal to the third direction D3.
- a change in (same as D2) can also be detected.
- the moving object 33 is intentionally arranged so as not to pass over the plurality of second active layers 72B, and it is confirmed that the second output is 0. It can also be applied to control.
- the optical sensor 1 may have a plurality of light receiving elements 19. As a result, for example, by comparing the first output and the second output with the output of one light receiving element 19, the light receiving elements 19 corresponding to the first output and the second output respectively can One output and the second output can be seen intermittently. Therefore, the recognition position accuracy of the optical sensor 1 can be improved.
- the light emission order of the plurality of active layers 7 may be clockwise or counterclockwise.
- the light emitting element, the light emitting / receiving element module, and the optical sensor according to the present invention are not limited to the above-described embodiments, and various modifications and improvements can be made without departing from the gist of the present invention. .
- the configurations described in the respective embodiments can be combined as appropriate.
- the optical sensor 1 is not limited to the image forming apparatus.
- the optical sensor 1 is applicable as long as it reflects light when reflected, and may be used, for example, for measuring the surface roughness of a metal molded body or a tablet.
- the irradiated object is a metal molded body or a tablet.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- Manufacturing & Machinery (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Health & Medical Sciences (AREA)
- Led Devices (AREA)
- Photo Coupler, Interrupter, Optical-To-Optical Conversion Devices (AREA)
Abstract
Description
<第1の実施形態>
発光素子1は、電流が流れることによって発光することができる。発光素子1は、図1に示すように、複数の半導体層2と、複数の半導体層2に電気的に接続している複数の電極3とを有している。その結果、発光素子1は、複数の電極3を使用して複数の半導体層2に電圧を印加することによって、複数の半導体層2の一部を発光させることができる。
図3、4に、第2実施形態の発光素子1Aの上面図を示す。なお、説明の便宜上、図3では、絶縁層11を除いた構成を示している。また、図4は、複数の活性層7の配置を示すために、図3に示した発光素子1Aから、第2半導体層8、第1電極9A、複数の第2電極10、第1電極パッド16および第2電極パッド17を除いた構成を示している。
図5、6に、第3実施形態に係る発光素子1Bの上面図を示す。なお、説明の便宜上、図5では、絶縁層11を除いた構成を示している。また、図6は、複数の活性層7Bの配置を示すために、図5に示した発光素子1Bから第2半導体層8、複数の第1電極9、複数の第2電極10B、第1電極パッド16および第2電極パッド17を除いた構成を示している。
図7,8、9に、第4実施形態の発光素子1Cの上面図を示す。なお、説明の便宜上、図7では、基板4、絶縁層11を除いた構成を示している。また、図8は、複数の活性層7Cの配置を示すために、図7に示した発光素子1Cから、第2半導体層8C、第1電極9C、複数の第2電極10C、第1電極パッド16および第2電極パッド17を除いた構成を示している。また、図9は、図7に示した発光素子1Cを、図7のIX-IX線で切断したときの断面図を示している。
図10、11に、第5実施形態の発光素子1Dの上面図を示す。なお、説明の便宜上、図10では、基板4、絶縁層11を除いた構成を示している。また、図11は、複数の活性層7Dの配置を示すために、図10に示した発光素子1Dから、第2半導体層8、第1電極9D、複数の第2電極10D、第1電極パッド16および第2電極パッド17を除いた構成を示している。
図12、13に、第6実施形態の発光素子1Eの上面図を示す。なお、説明の便宜上、図12では、基板4、絶縁層11を除いた構成を示している。また、図13は、複数の活性層7の配置を示すために、図12に示した発光素子1Eから、第2半導体層8、第1電極9E、複数の第2電極10E、第1電極パッド16および第2電極パッド17を除いた構成を示している。
図14に、受発光素子モジュール18の概要を示す。
図15に、光学式センサ31の概要を示す。
Claims (9)
- 一導電型を有した、少なくとも1つの第1半導体層と、
前記第1半導体層上に積層された複数の活性層と、
前記複数の活性層上に積層され、他導電型を有した、複数の第2半導体層と、
前記第1半導体層および前記第2半導体層に接続された複数の電極とを備え、
前記複数の電極の一部は、前記複数の活性層を挟んで、互いに対向しており、
前記複数の電極の他の一部は、前記一部の間の領域に位置している、発光素子。 - 前記複数の活性層は、第1方向に並んでおり、
前記複数の電極は、前記複数の活性層同士の間に配され、且つ前記第1半導体層上に配されている少なくとも1つの第1電極と、前記複数の第2半導体層上に配されている複数の第2電極と、をさらに有している、請求項1に記載の発光素子。 - 前記少なくとも1つの第1電極は、一直線状であり、
前記複数の第2電極は、前記少なくとも1つの第1電極の伸長方向に沿って伸びている複数の主部と、前記複数の主部から前記第1電極に向かって伸びている延在部とを有している、請求項2に記載の発光素子。 - 前記複数の活性層を複数の第1活性層としたときに、
前記複数の第1活性層のそれぞれに対して、前記第1方向と交わる第2方向に並んでいる複数の第2活性層をさらに有している、請求項2または3に記載の発光素子。 - 前記複数の第1活性層同士の間の距離は、前記複数の第1活性層と前記複数の第2活性層との距離よりも大きい、請求項4に記載の発光素子。
- 前記複数の第2電極は、それぞれ電気的に独立している、請求項2~5のいずれかに記載の発光素子。
- 請求項1~6のいずれかに記載の発光素子と、
少なくとも1つの受光素子と、を有している、受発光素子モジュール。 - 請求項7に記載の受発光素子モジュールと、
前記受発光素子モジュールの発光部に対向するように位置している台座部とを備える、光学式センサ。 - 前記台座部として搬送器を有しており、
前記搬送器の搬送面が前記受発光素子モジュールの発光部に対向するように位置しており、
前記受発光素子モジュールは、前記搬送器の搬送方向と前記第1方向に直交する第2方向が交わるように配されている、請求項8に記載の光学式センサ。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017547907A JP6578368B2 (ja) | 2015-10-29 | 2016-10-28 | 発光素子、受発光素子モジュールおよび光学式センサ |
EP16859987.6A EP3370266B1 (en) | 2015-10-29 | 2016-10-28 | Light-emitting element, light receiving and emitting element module, and optical sensor |
US15/768,819 US20180309025A1 (en) | 2015-10-29 | 2016-10-28 | Light-emitting device, light receiving and emitting device module, and optical sensor |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015212483 | 2015-10-29 | ||
JP2015-212483 | 2015-10-29 | ||
JP2015247117 | 2015-12-18 | ||
JP2015-247117 | 2015-12-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017073759A1 true WO2017073759A1 (ja) | 2017-05-04 |
Family
ID=58631570
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2016/082141 WO2017073759A1 (ja) | 2015-10-29 | 2016-10-28 | 発光素子、受発光素子モジュールおよび光学式センサ |
Country Status (4)
Country | Link |
---|---|
US (1) | US20180309025A1 (ja) |
EP (1) | EP3370266B1 (ja) |
JP (1) | JP6578368B2 (ja) |
WO (1) | WO2017073759A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2022086655A (ja) * | 2020-11-30 | 2022-06-09 | 聯嘉光電股▲ふん▼有限公司 | 発光ダイオードのチップ構造 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04207079A (ja) * | 1990-11-30 | 1992-07-29 | Hitachi Ltd | 受発光複合素子 |
JP2003031858A (ja) * | 2001-05-15 | 2003-01-31 | Lumileds Lighting Us Llc | 低屈折率の充填物を有する半導体ledフリップチップ |
JP2003347589A (ja) * | 2002-05-28 | 2003-12-05 | Matsushita Electric Works Ltd | Ledチップ |
JP2006005215A (ja) * | 2004-06-18 | 2006-01-05 | Stanley Electric Co Ltd | 半導体発光素子及びその製造方法 |
JP2010056488A (ja) * | 2008-08-29 | 2010-03-11 | Oki Data Corp | 表示装置 |
JP2013072843A (ja) * | 2011-09-29 | 2013-04-22 | Dainippon Screen Mfg Co Ltd | 半導体検査方法および半導体検査装置 |
JP2013115245A (ja) * | 2011-11-29 | 2013-06-10 | Kyocera Corp | 受発光素子 |
JP2015060998A (ja) * | 2013-09-19 | 2015-03-30 | パナソニック株式会社 | センサモジュールおよび当該センサモジュールに用いられる立体配線回路基板 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101007128B1 (ko) * | 2009-02-19 | 2011-01-10 | 엘지이노텍 주식회사 | 발광소자 및 그 제조방법 |
KR20110098600A (ko) * | 2010-02-26 | 2011-09-01 | 삼성엘이디 주식회사 | 멀티셀 어레이를 갖는 반도체 발광장치 및 이의 제조방법 |
KR101649267B1 (ko) * | 2010-04-30 | 2016-08-18 | 서울바이오시스 주식회사 | 복수개의 발광셀들을 갖는 발광 다이오드 |
JP5633477B2 (ja) * | 2010-08-27 | 2014-12-03 | 豊田合成株式会社 | 発光素子 |
US20120269520A1 (en) * | 2011-04-19 | 2012-10-25 | Hong Steve M | Lighting apparatuses and led modules for both illumation and optical communication |
KR20130128841A (ko) * | 2012-05-18 | 2013-11-27 | 삼성전자주식회사 | 멀티셀 어레이를 갖는 반도체 발광장치 및 그 제조방법, 그리고 발광모듈 및 조명장치 |
JP2015028997A (ja) * | 2013-07-30 | 2015-02-12 | 日亜化学工業株式会社 | 発光装置及びその製造方法 |
JP2015052707A (ja) * | 2013-09-06 | 2015-03-19 | 株式会社リコー | 画像形成装置 |
-
2016
- 2016-10-28 EP EP16859987.6A patent/EP3370266B1/en active Active
- 2016-10-28 WO PCT/JP2016/082141 patent/WO2017073759A1/ja active Application Filing
- 2016-10-28 US US15/768,819 patent/US20180309025A1/en not_active Abandoned
- 2016-10-28 JP JP2017547907A patent/JP6578368B2/ja active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04207079A (ja) * | 1990-11-30 | 1992-07-29 | Hitachi Ltd | 受発光複合素子 |
JP2003031858A (ja) * | 2001-05-15 | 2003-01-31 | Lumileds Lighting Us Llc | 低屈折率の充填物を有する半導体ledフリップチップ |
JP2003347589A (ja) * | 2002-05-28 | 2003-12-05 | Matsushita Electric Works Ltd | Ledチップ |
JP2006005215A (ja) * | 2004-06-18 | 2006-01-05 | Stanley Electric Co Ltd | 半導体発光素子及びその製造方法 |
JP2010056488A (ja) * | 2008-08-29 | 2010-03-11 | Oki Data Corp | 表示装置 |
JP2013072843A (ja) * | 2011-09-29 | 2013-04-22 | Dainippon Screen Mfg Co Ltd | 半導体検査方法および半導体検査装置 |
JP2013115245A (ja) * | 2011-11-29 | 2013-06-10 | Kyocera Corp | 受発光素子 |
JP2015060998A (ja) * | 2013-09-19 | 2015-03-30 | パナソニック株式会社 | センサモジュールおよび当該センサモジュールに用いられる立体配線回路基板 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2022086655A (ja) * | 2020-11-30 | 2022-06-09 | 聯嘉光電股▲ふん▼有限公司 | 発光ダイオードのチップ構造 |
Also Published As
Publication number | Publication date |
---|---|
EP3370266A1 (en) | 2018-09-05 |
US20180309025A1 (en) | 2018-10-25 |
JPWO2017073759A1 (ja) | 2018-06-21 |
JP6578368B2 (ja) | 2019-09-18 |
EP3370266B1 (en) | 2020-06-17 |
EP3370266A4 (en) | 2019-06-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10121930B2 (en) | Light receiving and emitting element module and sensor device using same | |
JP6495988B2 (ja) | 受発光素子およびこれを用いたセンサ装置 | |
JP6215728B2 (ja) | 受発光素子モジュール | |
JP5692971B2 (ja) | 受発光素子及びその製造方法、並びに受発光素子を備えた光センサ装置 | |
JP5882720B2 (ja) | 受発光素子モジュールおよびこれを用いたセンサ装置 | |
US20170294426A1 (en) | Light-emitting-and-receiving element module and sensor device using the same | |
WO2013065731A1 (ja) | センサ装置 | |
WO2013065668A1 (ja) | 受発光一体型素子を用いた受発光装置およびセンサ装置 | |
US10374116B2 (en) | Light receiving and emitting element module and sensor device | |
KR20200137540A (ko) | 수직형 발광 다이오드 | |
US7361935B2 (en) | Semiconductor device, LED print head, that uses the semiconductor, and image forming apparatus that uses the LED print head | |
JP2010034352A (ja) | 受発光素子アレイ及びこれを備えたセンサ装置 | |
JP6578368B2 (ja) | 発光素子、受発光素子モジュールおよび光学式センサ | |
US9018654B2 (en) | Semiconductor light emitting device and light emitting apparatus | |
JP5822688B2 (ja) | 受発光素子 | |
JP2016009817A (ja) | 発光素子 | |
JP6616369B2 (ja) | 受発光素子モジュール | |
JP6117635B2 (ja) | 受発光素子、および受発光素子の製造方法 | |
JP5279616B2 (ja) | 発光装置並びにこれを備える露光装置、画像形成装置及び光照射ヘッド | |
JP2017135276A (ja) | 受発光素子、受発光素子モジュールおよびセンサ装置 | |
JP2017085022A (ja) | 受発光素子、受発光素子モジュールおよびセンサ装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 16859987 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2017547907 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 15768819 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2016859987 Country of ref document: EP |