WO2012026068A1 - 発光素子 - Google Patents
発光素子 Download PDFInfo
- Publication number
- WO2012026068A1 WO2012026068A1 PCT/JP2011/004398 JP2011004398W WO2012026068A1 WO 2012026068 A1 WO2012026068 A1 WO 2012026068A1 JP 2011004398 W JP2011004398 W JP 2011004398W WO 2012026068 A1 WO2012026068 A1 WO 2012026068A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- electrode
- light emitting
- barrier
- light
- Prior art date
Links
- 230000004888 barrier function Effects 0.000 claims abstract description 64
- 239000000758 substrate Substances 0.000 claims abstract description 29
- 239000004065 semiconductor Substances 0.000 claims abstract description 17
- 238000009792 diffusion process Methods 0.000 claims abstract description 5
- 230000003287 optical effect Effects 0.000 claims abstract 2
- 239000010936 titanium Substances 0.000 claims description 32
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 27
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 11
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 239000010948 rhodium Substances 0.000 claims description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- 229910052709 silver Inorganic materials 0.000 claims description 5
- 239000004332 silver Substances 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 229910052715 tantalum Inorganic materials 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 2
- 229910052703 rhodium Inorganic materials 0.000 claims description 2
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 2
- 239000010937 tungsten Substances 0.000 claims description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims 1
- 239000010410 layer Substances 0.000 description 189
- 229910002601 GaN Inorganic materials 0.000 description 20
- 230000007423 decrease Effects 0.000 description 14
- 238000010438 heat treatment Methods 0.000 description 9
- 239000010931 gold Substances 0.000 description 6
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 229910052733 gallium Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000001039 wet etching Methods 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
- H01L33/40—Materials therefor
- H01L33/405—Reflective materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/02—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
- H01L33/26—Materials of the light emitting region
- H01L33/30—Materials of the light emitting region containing only elements of Group III and Group V of the Periodic Table
- H01L33/32—Materials of the light emitting region containing only elements of Group III and Group V of the Periodic Table containing nitrogen
-
- 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
- H01L33/38—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 with a particular shape
- H01L33/385—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 with a particular shape the electrode extending at least partially onto a side surface of the semiconductor body
Definitions
- the present invention relates to a light emitting device, and more particularly to a light emitting device having a reflective electrode and a cover electrode.
- a flip-chip type light emitting device In the flip chip type light emitting device, light emitted from the active layer is emitted not only in the direction of the light-transmitting substrate but also in the direction opposite to the substrate.
- a flip-chip type light emitting device is provided with a reflective electrode that reflects light emitted in a direction opposite to the substrate.
- the p electrode is a laminate of an ohmic electrode made of nickel (Ni) or the like that makes ohmic contact with the p-type contact layer, and a reflective electrode made of a metal layer having a high light reflectance such as aluminum (Al).
- a reflective electrode made of Al is directly laminated on an ohmic electrode made of Ni, interdiffusion of atoms occurs between the Ni layer and the Al layer, and the characteristics of the ohmic electrode may be deteriorated, resulting in an increase in operating voltage. For this reason, it has been studied to form a barrier electrode made of a refractory metal such as molybdenum (Mo) between the ohmic electrode and the reflective electrode (see, for example, Patent Document 1). By forming the barrier electrode, it is expected that interdiffusion of metal atoms between the ohmic electrode and the reflective electrode can be suppressed and an increase in operating voltage can be prevented.
- Mo molybdenum
- the conventional light emitting device in which the reflectance of the ohmic electrode itself is improved has the following problems.
- a cover electrode including an Al layer is formed on the ohmic electrode for bonding or the like.
- the inventors of the present application have found that when the cover electrode is formed, the luminance of the light emitting element decreases when the light emitting element is energized for a long time or when the light emitting element is exposed to a high temperature state. It was also found that the driving voltage increases as the luminance decreases.
- a light emitting element is required to maintain stable luminance. In particular, when used in a lighting device or the like, it is necessary to light for a long time, and a change in luminance with time is a serious problem. Further, when the light emitting element is mounted on a printed wiring board or the like, since it is exposed to a high temperature by a reflow furnace or the like, a decrease in luminance due to the high temperature becomes a big problem.
- the exemplary light emitting device includes a barrier electrode that suppresses interdiffusion between the cover electrode and the reflective electrode between the reflective electrode and the cover electrode.
- an example light-emitting element includes a light-transmitting substrate, a semiconductor layer formed over the substrate, an n-type layer, a light-emitting layer, and a p-type layer, and a semiconductor layer.
- a reflective electrode that reflects light from the layer toward the substrate, a barrier electrode formed on the reflective electrode, and a cover electrode formed on the barrier electrode, the reflective electrode including an Ag layer,
- the electrode includes an Al layer, and the barrier electrode suppresses interdiffusion between Ag atoms and Al atoms.
- the light emitting element of the present disclosure it is possible to suppress a decrease in luminance and an increase in driving voltage due to long-time energization and heating.
- An example light-emitting element includes a light-transmitting substrate, a semiconductor layer formed on the substrate and having an n-type layer, a light-emitting layer, and a p-type layer, and a light emitted from the light-emitting layer.
- the reflective electrode includes an Ag layer, and the cover electrode is an Al layer.
- the barrier electrode suppresses interdiffusion between Ag atoms and Al atoms.
- the inventor of the present application has found that the decrease in luminance and the increase in driving voltage of the light-emitting element are caused by the Al layer diffusing and reaching the Ag layer due to the energization for a long time and the high temperature to denature the Ag layer. It was.
- a barrier electrode is provided between the reflective electrode and the cover electrode, and diffusion of the Al layer can be suppressed. As a result, it is possible to prevent the reflectance of the Ag layer from being lowered due to the modification of the Ag layer, to prevent the brightness from being lowered, and to prevent the drive voltage from being raised.
- the area of the barrier electrode may be equal to or larger than the area of the Ag layer
- the area of the Al layer may be equal to or larger than the area of the barrier electrode.
- the barrier electrode is a single-layer metal layer or a stack of a plurality of metal layers, and the metal layer includes titanium (Ti), nickel (Ni), rhodium (Rh), tantalum (Ta), and tungsten.
- Ti titanium
- Ni nickel
- Rh rhodium
- Ta tantalum
- tungsten tungsten
- a layer including any one of (W) or an alloy layer including two or more may be used.
- the thickness of the metal layer may be 100 nm or more.
- the thickness of the metal layer may be 100 nm or more.
- the reflective electrode includes a Ni layer having the same planar shape and area as the Ag layer, the barrier electrode is made of Ti, and the area of the barrier electrode is larger than that of the reflective electrode and smaller than that of the Al layer. And it is sufficient.
- the barrier electrode is a Ti layer wider than the reflective electrode formed by the Ni layer and the Ag layer having the same contour shape and in a range narrower than the Al layer, the Ni layer, the Ag layer, and the Ti layer are separated.
- the mask pattern can be formed.
- the reflective electrode includes a platinum (Pt) layer having the same planar shape and area as the Ag layer, the barrier electrode is made of titanium, and the planar shape and area of the barrier electrode are equal to those of the reflective electrode. Also good.
- the Pt layer, the Ag layer, and the Ti layer can be formed with the same mask pattern. Therefore, it is possible to omit removing the mask pattern after forming the Pt layer and the Ag layer, or forming a new mask pattern for forming the Ti layer.
- a light emitting device 10 includes a light transmissive substrate 11, a semiconductor layer 12 stacked on the substrate 11, a semiconductor layer 12, and supplies power.
- This is a flip chip type light emitting diode (LED) having an n electrode 13 and a p electrode 14.
- the substrate 11 is described as being a gallium nitride (GaN) substrate.
- GaN gallium nitride
- any substrate may be used as long as light can be transmitted and a semiconductor layer can be grown.
- a sapphire substrate can be used.
- the semiconductor layer 12 has an N-GaN layer 12a that is an n-type layer, a light emitting layer 12b, and a P-GaN layer 12c that is a p-type layer, which are sequentially stacked from the substrate 11 side.
- a buffer layer may be provided between the substrate 11 and the N-GaN layer 12a.
- the n-type dopant of the N-GaN layer 12a may be Si or Ge.
- the film thickness of the N-GaN layer 12a may be about 2 ⁇ m.
- the light emitting layer 12b contains at least Ga and N, and contains an appropriate amount of In as necessary. A desired emission wavelength can be obtained by adjusting the In content.
- the light emitting layer 12b may be a single layer, for example, it may have a multi-quantum well structure in which at least a pair of InGaN layers and GaN layers are alternately stacked. If the light emitting layer 12b has a multi-quantum well structure, the luminance can be further improved.
- the P-GaN layer 12c is laminated on the light emitting layer 12b directly or via a semiconductor layer containing at least Ga and N.
- the p-type dopant of the P-GaN layer 12c may be Mg or the like.
- the thickness of the P-GaN layer 12c may be about 0.1 ⁇ m.
- n electrode 13 and a p electrode 14 are formed on the semiconductor layer 12.
- the n-electrode 13 is provided in a region on the N-GaN layer 12a where the P-GaN layer 12c, the light emitting layer 12b, and a part of the N-GaN layer 12a are exposed by selective etching.
- the n-electrode 13 includes an Al layer 13a, a Ti layer 13b, and a gold (Au) layer 13c that are sequentially stacked from the semiconductor layer 12 side.
- the p electrode 14 is stacked on the P-GaN layer 12c.
- the p-electrode 14 has a Ni layer 14a and an Ag layer 14b that are sequentially stacked from the semiconductor layer 12 side.
- the p-electrode 14 has an Ag layer 14b having a high reflectance and functions as a reflective electrode.
- the Ni layer 14a functions as an adhesive layer that improves the adhesion between the P-GaN layer 12c and the Ag layer 14b.
- the film thickness of the Ni layer 14a may be in the range of about 0.1 nm to about 5 nm.
- the side surface of the P-GaN layer 12c, the side surface of the light emitting layer 12b, and the surface of the N-GaN layer 12a that are exposed by etching around the p-electrode 14 are covered with a silicon oxide (SiO 2 ) layer 15 that is a protective layer. Yes.
- a barrier electrode 17 is formed on the p-electrode 14.
- the barrier electrode 17 in this embodiment is a Ti layer.
- the thickness of the barrier electrode 17 which is a Ti layer is about 100 nm.
- the barrier electrode 17 is formed in a wider range than the p-electrode 14.
- the barrier electrode 17 may be formed as follows. First, after the SiO 2 layer 15 is formed on the selectively etched semiconductor layer 12, the SiO 2 layer 15 is selectively removed to selectively expose the P-GaN layer 12c. Subsequently, a p-electrode 14 is formed on the exposed P-GaN layer 12c using a mask pattern.
- a Ti layer is formed, and unnecessary portions of the Ti layer are selectively removed by wet etching.
- the Ti layer may remain in a wider range than the Ag layer 14b.
- a cover electrode 16 is formed on the barrier electrode 17.
- the cover electrode 16 has an Al layer 16a, a Ti layer 16b, and an Au layer 16c.
- the thickness of the Al layer 16a may be about 250 nm.
- the Al layer 16 a is formed in a wider range than the Ti layer that is the barrier electrode 17. Therefore, the Al layer 16 a is formed in a wider range than the Ag layer 14 b of the p electrode 14.
- the light emitted from the light emitting layer 12b to the p-electrode 14 side is reflected to the substrate 11 side in the Ag layer 14b. Since the Al layer 16a is formed in a wider range than the barrier electrode 17, the light that leaks from the periphery of the Ag layer 14b and reaches the cover electrode 16 is also reflected by the Al layer 16a toward the substrate 11 side. Therefore, the light emitting device 10 of the present embodiment can achieve high light extraction efficiency.
- the thickness of the Ti layer 16b may be about 100 nm.
- the thickness of the Au layer 16c may be about 1300 nm.
- a Ti layer that is a barrier electrode 17 is provided on a p-electrode 14, and is positioned between an Ag layer 14 b that is a reflective electrode and an Al layer 16 a that is a cover electrode 16. Yes.
- the barrier electrode 17 can prevent Al in the Al layer 16a from diffusing and reaching the Ag layer 14b due to energization and high temperature for a long time. Accordingly, it is possible to prevent a decrease in reflectance and an increase in resistance value of the Ag layer 14b, and it is possible to prevent a decrease in luminance and an increase in driving voltage of the light emitting element 10. As a result, a high-quality light emitting device 10 can be realized.
- the barrier electrode 17 is a Ti layer, but it may be a Rh layer, a Ni layer, a Ta layer, a W layer, or the like instead of the Ti layer. Moreover, it is good also as a laminated body containing Ti layer, Rh layer, Ni layer, Ta layer, W layer, etc. Furthermore, it is good also as a layer or laminated body etc. which consist of an alloy containing Ti, Rh, Ni, Ta, and W. In any case, the thickness of the barrier electrode 17 is preferably 100 nm or more.
- the barrier electrode 17 is a Ti layer having a thickness of 100 nm
- the barrier electrode 17 is a laminated film of a Ni layer having a thickness of 100 nm and a Ti layer having a thickness of 100 nm.
- the electrode 17 was an Rh layer having a thickness of 100 nm.
- the light emitting element D did not form the barrier electrode 17, and the light emitting elements E and F respectively formed a Pt layer and a Cr layer having a thickness of 30 nm instead of the barrier electrode 17.
- Two light emitting elements A to C were prepared, and the reflectances before and after heating at 300 ° C. for about 3 minutes were compared.
- the value obtained by dividing the difference between the reflectance before heating and the average value of the reflectance after heating by the reflectance before heating was defined as the reflectance reduction rate.
- the light emitting elements A to C provided with the barrier electrode 17 had a reflectance reduction rate of less than 1%.
- an error of about 1% is included in the reflectance value, although the decrease rate is negative for the light emitting elements A and B, it is considered to be a measurement error. Therefore, it is estimated that the reflectance of the light emitting elements A to C is hardly affected by heating.
- the reflectance is reduced by about 34.5%
- the reflection is about 44.6%.
- a decrease in rate was observed.
- the light emitting element F provided with a Cr layer instead of the barrier electrode 17 a decrease in reflectance exceeding 1% was observed although the decrease in reflectance was small compared to the light emitting elements D and E.
- the light emitting element 10A includes a p-electrode 14A that functions as a reflective electrode, and a barrier electrode 17A.
- the p-electrode is a stacked body of a Ni layer and an Ag layer, but the p-electrode 14A of this modification is a stacked body of a Pt layer 14c and an Ag layer 14b.
- the barrier electrode 17A is a Ti layer and has the same planar shape and size as the p-electrode 14A.
- the Ti layer as the barrier electrode 17A can be formed with the same mask pattern as that used when forming the p electrode 14A. It becomes. For this reason, the removal of the mask pattern for forming the p electrode 14A and the formation of the mask pattern for forming the barrier electrode 17A can be omitted. Therefore, the manufacturing process can be simplified while preventing Al from diffusing from the Al layer 16a to the Ag layer 14b.
- the barrier electrode 17A is formed in the same range as the Ag layer 14b, and the Al layer 16a of the cover electrode 16 is formed in a wider range than the barrier electrode 17A.
- the barrier electrode 17A may be formed in a wider range than the Ag layer 14b.
- the Al layer 16a of the cover electrode 16 may be formed in the same range as the barrier electrode 17A.
- the light-emitting element of the present disclosure can suppress a decrease in luminance and an increase in driving voltage due to a long-time energization and heating, and is particularly useful as a light-emitting element that has a reflective electrode and a cover electrode and extracts light from the substrate side. It is.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Led Devices (AREA)
- Electrodes Of Semiconductors (AREA)
Abstract
Description
図1に示すように、一実施形態に係る発光素子10は、光透過性の基板11と、基板11の上に積層された半導体層12と、半導体層12の上に形成され、電力を供給するn電極13及びp電極14を有するフリップチップタイプの発光ダイオード(LED)である。本実施形態においては、基板11が窒化ガリウム(GaN)基板であるとして説明するが、光が透し、半導体層を成長させられればどのような基板であってもよい。例えば、サファイア基板等を用いることもできる。
図3に示すように変形例に係る発光素子10Aは、反射電極として機能するp電極14Aと、バリア電極17Aとを有している。一実施形態においてはp電極を、Ni層とAg層との積層体としたが、本変形例のp電極14Aは、Pt層14cとAg層14bとの積層体である。バリア電極17Aは、Ti層でありp電極14Aと同じ平面形状及びサイズを有している。
10A 発光素子
11 基板
12 半導体層
12a N-GaN層
12b 発光層
12c P-GaN層
13 n電極
13a Al層
13b Ti層
13c Au層
14 p電極
14A p電極
14a Ni層
14b Ag層
14c Pt層
15 SiO2層
16 カバー電極
16a Al層
16b Ti層
16c Au層
17 バリア電極
17A バリア電極
Claims (6)
- 光透過性を有する基板と、
前記基板の上に形成され、n型層、発光層及びp型層を有する半導体層と、
前記半導体層の上に形成され、前記発光層からの光を前記基板の方向へ反射する反射電極と、
前記反射電極の上に形成されたバリア電極と、
前記バリア電極の上に形成されたカバー電極とを備え、
前記反射電極は銀層を含み、
前記カバー電極はアルミニウム層を含み、
前記バリア電極は、銀原子とアルミニウム原子との相互拡散を抑制する発光素子。 - 前記バリア電極の面積は前記銀層の面積以上であり、
前記アルミニウム層の面積は、前記バリア電極の面積以上である請求項1に記載の発光素子。 - 前記バリア電極は、単層の金属層又は複数の金属層の積層体であり、
前記金属層は、チタン、ニッケル、ロジウム、タンタル及びタングステンのいずれか1つを含む層又は2つ以上を含む合金層である請求項1又は2に記載の発光素子。 - 前記金属層の厚さは、100nm以上である請求項3に記載の発光素子。
- 前記反射電極は、前記銀層と同一の平面形状を有するニッケル層を含み、
前記バリア電極はチタンからなり、
前記バリア電極の面積は、前記反射電極より広く、且つ前記アルミニウム層より狭い請求項1~4のいずれか1項に記載の発光素子。 - 前記反射電極は、前記銀層と同一の平面形状を有する白金層を含み、
前記バリア電極はチタンからなり、
前記バリア電極の面積は前記反射電極と等しい請求項1~4のいずれか1項に記載の発光素子。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/813,842 US20130168721A1 (en) | 2010-08-24 | 2011-08-03 | Light emitting device |
JP2012530511A JPWO2012026068A1 (ja) | 2010-08-24 | 2011-08-03 | 発光素子 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010-186816 | 2010-08-24 | ||
JP2010186816 | 2010-08-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012026068A1 true WO2012026068A1 (ja) | 2012-03-01 |
Family
ID=45723092
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/004398 WO2012026068A1 (ja) | 2010-08-24 | 2011-08-03 | 発光素子 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20130168721A1 (ja) |
JP (1) | JPWO2012026068A1 (ja) |
TW (1) | TW201216516A (ja) |
WO (1) | WO2012026068A1 (ja) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013243253A (ja) * | 2012-05-21 | 2013-12-05 | Nichia Chem Ind Ltd | 半導体発光素子 |
JP2016195275A (ja) * | 2016-07-21 | 2016-11-17 | 日亜化学工業株式会社 | 半導体発光素子 |
CN110993766A (zh) * | 2015-02-17 | 2020-04-10 | 新世纪光电股份有限公司 | 发光元件 |
CN112635629A (zh) * | 2020-12-30 | 2021-04-09 | 深圳第三代半导体研究院 | 一种发光二极管及其制造方法 |
CN112652690A (zh) * | 2020-12-30 | 2021-04-13 | 深圳第三代半导体研究院 | 一种发光二极管及其制造方法 |
CN112652688A (zh) * | 2020-12-30 | 2021-04-13 | 深圳第三代半导体研究院 | 一种发光二极管及其制造方法 |
JP6890707B1 (ja) * | 2020-10-20 | 2021-06-18 | Dowaエレクトロニクス株式会社 | 半導体発光素子及び半導体発光素子の製造方法 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10535804B2 (en) | 2015-07-22 | 2020-01-14 | Lg Innotek Co., Ltd. | Light-emitting device package |
US10522708B2 (en) | 2017-12-14 | 2019-12-31 | Lumileds Llc | Method of preventing contamination of LED die |
WO2019118695A1 (en) * | 2017-12-14 | 2019-06-20 | Lumileds Llc | Method of preventing contamination of led die |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005303287A (ja) * | 2004-03-18 | 2005-10-27 | Showa Denko Kk | Iii族窒化物半導体発光素子、その製造方法及びledランプ |
JP2006024750A (ja) * | 2004-07-08 | 2006-01-26 | Matsushita Electric Ind Co Ltd | 発光素子 |
JP2006245231A (ja) * | 2005-03-02 | 2006-09-14 | Nichia Chem Ind Ltd | 半導体発光素子 |
JP2007103690A (ja) * | 2005-10-05 | 2007-04-19 | Matsushita Electric Ind Co Ltd | 半導体発光装置及びその製造方法 |
JP2007243074A (ja) * | 2006-03-10 | 2007-09-20 | Mitsubishi Cable Ind Ltd | 3族窒化物系発光ダイオード |
JP2008016629A (ja) * | 2006-07-05 | 2008-01-24 | Mitsubishi Cable Ind Ltd | 3族窒化物系発光ダイオード素子の製造方法 |
JP2008103674A (ja) * | 2006-10-18 | 2008-05-01 | Samsung Electro Mech Co Ltd | 多層反射膜電極及びそれを備えた化合物半導体発光素子 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8643046B2 (en) * | 2009-05-14 | 2014-02-04 | Toyoda Gosei Co., Ltd. | Semiconductor light-emitting element, method for producing the same, lamp, lighting device, electronic equipment, mechanical device and electrode |
-
2011
- 2011-08-03 US US13/813,842 patent/US20130168721A1/en not_active Abandoned
- 2011-08-03 JP JP2012530511A patent/JPWO2012026068A1/ja not_active Withdrawn
- 2011-08-03 WO PCT/JP2011/004398 patent/WO2012026068A1/ja active Application Filing
- 2011-08-22 TW TW100130008A patent/TW201216516A/zh unknown
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005303287A (ja) * | 2004-03-18 | 2005-10-27 | Showa Denko Kk | Iii族窒化物半導体発光素子、その製造方法及びledランプ |
JP2006024750A (ja) * | 2004-07-08 | 2006-01-26 | Matsushita Electric Ind Co Ltd | 発光素子 |
JP2006245231A (ja) * | 2005-03-02 | 2006-09-14 | Nichia Chem Ind Ltd | 半導体発光素子 |
JP2007103690A (ja) * | 2005-10-05 | 2007-04-19 | Matsushita Electric Ind Co Ltd | 半導体発光装置及びその製造方法 |
JP2007243074A (ja) * | 2006-03-10 | 2007-09-20 | Mitsubishi Cable Ind Ltd | 3族窒化物系発光ダイオード |
JP2008016629A (ja) * | 2006-07-05 | 2008-01-24 | Mitsubishi Cable Ind Ltd | 3族窒化物系発光ダイオード素子の製造方法 |
JP2008103674A (ja) * | 2006-10-18 | 2008-05-01 | Samsung Electro Mech Co Ltd | 多層反射膜電極及びそれを備えた化合物半導体発光素子 |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013243253A (ja) * | 2012-05-21 | 2013-12-05 | Nichia Chem Ind Ltd | 半導体発光素子 |
CN110993766A (zh) * | 2015-02-17 | 2020-04-10 | 新世纪光电股份有限公司 | 发光元件 |
JP2016195275A (ja) * | 2016-07-21 | 2016-11-17 | 日亜化学工業株式会社 | 半導体発光素子 |
JP6890707B1 (ja) * | 2020-10-20 | 2021-06-18 | Dowaエレクトロニクス株式会社 | 半導体発光素子及び半導体発光素子の製造方法 |
WO2022085231A1 (ja) * | 2020-10-20 | 2022-04-28 | Dowaエレクトロニクス株式会社 | 半導体発光素子、半導体発光素子接続構造及び半導体発光素子の製造方法 |
JP2022067526A (ja) * | 2020-10-20 | 2022-05-06 | Dowaエレクトロニクス株式会社 | 半導体発光素子及び半導体発光素子の製造方法 |
CN112635629A (zh) * | 2020-12-30 | 2021-04-09 | 深圳第三代半导体研究院 | 一种发光二极管及其制造方法 |
CN112652690A (zh) * | 2020-12-30 | 2021-04-13 | 深圳第三代半导体研究院 | 一种发光二极管及其制造方法 |
CN112652688A (zh) * | 2020-12-30 | 2021-04-13 | 深圳第三代半导体研究院 | 一种发光二极管及其制造方法 |
Also Published As
Publication number | Publication date |
---|---|
US20130168721A1 (en) | 2013-07-04 |
TW201216516A (en) | 2012-04-16 |
JPWO2012026068A1 (ja) | 2013-10-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2012026068A1 (ja) | 発光素子 | |
KR101064020B1 (ko) | 발광 소자 및 그 제조방법 | |
JP5719110B2 (ja) | 発光素子 | |
JP4644193B2 (ja) | 半導体発光素子 | |
TWI555231B (zh) | 半導體發光元件 | |
JP5251121B2 (ja) | 窒化ガリウム系半導体発光素子及びその製造方法 | |
JP5179766B2 (ja) | 半導体発光装置およびその製造方法 | |
JP5048960B2 (ja) | 半導体発光素子 | |
US7868344B2 (en) | Nitride semiconductor light emitting device including electrodes of a multilayer structure | |
JP4875361B2 (ja) | 3族窒化物発光素子 | |
JP2008192782A (ja) | 電極及びそれを有するiii族窒化物系化合物半導体発光素子 | |
JP2004179347A (ja) | 半導体発光素子 | |
JP2006303430A (ja) | フリップチップ型の窒化物半導体発光素子 | |
JP2007103689A (ja) | 半導体発光装置 | |
JP5258853B2 (ja) | 半導体発光素子及びその製造方法 | |
KR20130052002A (ko) | Ⅲ족 질화물 반도체 발광 소자의 제조 방법 | |
WO2012077407A1 (ja) | 窒化物系半導体発光素子 | |
WO2011077748A1 (ja) | バーチカル型iii族窒化物半導体発光素子およびその製造方法 | |
JP2005123489A (ja) | 窒化物半導体発光素子およびその製造方法 | |
JP5608340B2 (ja) | 半導体発光素子 | |
US20120223357A1 (en) | Semiconductor Light-Emitting Device | |
JP2007243074A (ja) | 3族窒化物系発光ダイオード | |
JP2011071444A (ja) | 発光素子 | |
JP5353809B2 (ja) | 半導体発光素子及び発光装置 | |
JP5608762B2 (ja) | 半導体発光素子 |
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: 11819545 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2012530511 Country of ref document: JP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13813842 Country of ref document: US |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 11819545 Country of ref document: EP Kind code of ref document: A1 |