JP2002185042A - Semiconductor light-emitting element - Google Patents

Semiconductor light-emitting element

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Publication number
JP2002185042A
JP2002185042A JP2001306429A JP2001306429A JP2002185042A JP 2002185042 A JP2002185042 A JP 2002185042A JP 2001306429 A JP2001306429 A JP 2001306429A JP 2001306429 A JP2001306429 A JP 2001306429A JP 2002185042 A JP2002185042 A JP 2002185042A
Authority
JP
Japan
Prior art keywords
layer
gan
semiconductor light
light emitting
quartz substrate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2001306429A
Other languages
Japanese (ja)
Other versions
JP3387491B2 (en
Inventor
Michio Kadota
道雄 門田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
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Priority to JP2001306429A priority Critical patent/JP3387491B2/en
Publication of JP2002185042A publication Critical patent/JP2002185042A/en
Application granted granted Critical
Publication of JP3387491B2 publication Critical patent/JP3387491B2/en
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Expired - Fee Related legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To form a high-quality InxGayAlzN film on a cheap crystal substrate. SOLUTION: A hexagonal system n-GaN film 3 is oriented to the axis (c) on a plane Z of a Z-cut crystal substrate 2; an n-AlGaN layer 4, InGaN layer 5, p-AlGaN layer 6 and p-GaN layer 7 are grown in this order on the n-GaN layer 3 and then etched to partly expose the n-GaN layer 3; an upper electrode 8 is provided on the upside of the p-GaN layer 7; and a lower electrode 9 is formed on the upside of the n-GaN layer 3.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は半導体発光素子に関
する。特に、III−V族化合物のGaN、InGaN、
GaAlN、InGaAlN等を用いた半導体発光素子
に関する。
[0001] The present invention relates to a semiconductor light emitting device. In particular, III-V compounds of GaN, InGaN,
The present invention relates to a semiconductor light emitting device using GaAlN, InGaAlN, or the like.

【0002】[0002]

【従来の技術】青色光ないし紫外線を発生する発光ダイ
オード(LED)やレーザーダイオード(LD)等の半
導体発光素子の材料としては、一般式InxGayAlz
N(ただし、x+y+z=1、0≦x≦1、0≦y≦
1、0≦z≦1)で表わされるIII−V族化合物半導体
が知られている。この化合物半導体は、直接遷移型であ
ることから発光効率が高く、また、In濃度によって発
光波長を制御できることから、発光素子用材料として注
目されている。
2. Description of the Related Art As a material of a semiconductor light emitting device such as a light emitting diode (LED) or a laser diode (LD) that generates blue light or ultraviolet light, a general formula InxGayAlz is used.
N (however, x + y + z = 1, 0 ≦ x ≦ 1, 0 ≦ y ≦
III-V group compound semiconductors represented by 1, 0 ≦ z ≦ 1) are known. Since this compound semiconductor is a direct transition type, it has high luminous efficiency, and its emission wavelength can be controlled by the In concentration.

【0003】このInxGayAlzNは大型の単結晶を
作製することが困難であるため、その結晶膜の製作にあ
たっては、異なる材料の基板上に成長させる、いわゆる
ヘテロエピタキシャル成長法が用いられており、一般に
はC面サファイア基板の上で成長させられる。しかし、
C面サファイア基板は高価であり、そのうえ大きな格子
不整合があり、成長した結晶中には転移密度108/c
m2〜1011/cm2という多数の結晶欠陥が生じてしま
い、結晶性に優れた良質の結晶膜を得ることができない
という問題があった。
[0003] Since it is difficult to produce a large single crystal of InxGayAlzN, a so-called heteroepitaxial growth method for growing a crystal film on a substrate of a different material is used. Grown on planar sapphire substrate. But,
C-plane sapphire substrates are expensive, have large lattice mismatch, and have a transition density of 10 8 / c
A large number of crystal defects of m @ 2 to 10 @ 11 / cm @ 2 are generated, and there is a problem that a high quality crystal film having excellent crystallinity cannot be obtained.

【0004】そこで、C面サファイア基板上にInxG
ayAlzNを成長させる際の格子不整合を小さくし、欠
陥の少ない結晶を得るため、C面サファイア基板の上に
多結晶又は非晶質のAlNバッファ層や低温成長GaN
バッファ層を設ける方法が提案されている。例えば、六
方晶系のGaNのa軸方向の格子定数(以下、格子定数
aという)が3.189Åであるのに対し、AlNの格
子定数aは3.1113ÅであってGaNに近い格子定
数を有しているので、この方法によれば、C面サファイ
ア基板とバッファ層の間の格子不整合を小さくできると
共にバッファ層とInxGayAlzNの格子不整合も小
さくできるので、欠陥の少ない結晶膜を得ることができ
る。しかし、この方法では、高価なC面サファイア基板
に加え、構造が複雑になることからいっそうコスト高に
なるという問題があった。
Therefore, InxG is deposited on a C-plane sapphire substrate.
In order to reduce lattice mismatch when growing ayAlzN and obtain a crystal with few defects, a polycrystalline or amorphous AlN buffer layer or a low-temperature grown GaN is formed on a C-plane sapphire substrate.
A method of providing a buffer layer has been proposed. For example, the lattice constant of the hexagonal GaN in the a-axis direction (hereinafter, referred to as lattice constant a) is 3.189 °, whereas the lattice constant a of AlN is 3.1113 °, which is a lattice constant close to GaN. Therefore, according to this method, the lattice mismatch between the C-plane sapphire substrate and the buffer layer can be reduced, and the lattice mismatch between the buffer layer and InxGayAlzN can be reduced. Can be. However, this method has a problem that the cost is further increased due to the complicated structure in addition to the expensive C-plane sapphire substrate.

【0005】また、基板としてSiC基板も検討されて
おり、SiC基板では格子不整合が小さい。しかし、S
iC基板は、C面サファイア基板と比較してもより高価
につく(C面サファイア基板の価格の10倍程度)とい
う欠点があった。
Further, a SiC substrate has been studied as a substrate, and the lattice mismatch of the SiC substrate is small. However, S
The iC substrate has a disadvantage that it is more expensive than the C-plane sapphire substrate (about 10 times the price of the C-plane sapphire substrate).

【0006】[0006]

【発明が解決しようとする課題】本発明は上述の技術的
問題点を解決するためになされたものであり、その目的
とするところは、安価な水晶基板を用いてその上に良質
なInxGayAlzN薄膜を形成することにある。
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned technical problems, and it is an object of the present invention to provide a high quality InxGayAlzN thin film on an inexpensive quartz substrate. Is to form

【0007】[0007]

【発明の開示】本発明の半導体発光素子は、InxGay
AlzN(ただし、x+y+z=1、0≦x≦1、0≦
y≦1、0≦z≦1)で表わされる化合物半導体を用い
た半導体発光素子において、Zカット水晶基板の上方に
InxGayAlzN層を形成したことを特徴としてい
る。
DISCLOSURE OF THE INVENTION The semiconductor light emitting device of the present invention has an InxGay
AlzN (where x + y + z = 1, 0 ≦ x ≦ 1, 0 ≦
In a semiconductor light emitting device using a compound semiconductor represented by y ≦ 1, 0 ≦ z ≦ 1), an InxGayAlzN layer is formed above a Z-cut quartz substrate.

【0008】水晶基板の[1000]方向における格子
定数aに対するInxGayAlzNの[1000]方向
における格子定数aの比(すなわち、各[1000]方
向の格子定数aの比)と、水晶基板の(101*0)の
距離に対するInxGayAlzNの(101*0)の距離
の比(すなわち、各[101*0]方向における(10
1*0)の距離の比)とは互いにほぼ等しい整数比とな
っているから、Zカット水晶基板上にInxGayAlz
N層を形成すれば、水晶基板上にInxGayAlzNを
c軸配向させることができ、格子不整合の小さな良質の
InxGayAlzN層を得ることができる。
The ratio of the lattice constant a of InxGayAlzN in the [1000] direction to the lattice constant a of the quartz substrate in the [1000] direction (ie, the ratio of the lattice constant a in each [1000] direction) and the (101 *) of the quartz substrate 0) to the (101 * 0) distance of InxGayAlzN (ie, (10 * 0) in each [101 * 0] direction).
1 * 0) is an integer ratio substantially equal to each other, so that InxGayAlz is placed on the Z-cut quartz substrate.
By forming the N layer, InxGayAlzN can be c-axis oriented on the quartz substrate, and a high quality InxGayAlzN layer with small lattice mismatch can be obtained.

【0009】なお、この明細書及び図面の全体を通じ
て、右肩の記号*は、結晶軸の負の方向を示している。
従って、通常の記法によれば、例えば[101*0]、
[112*0]、(101*0)は、次の(1)〜(3)式のよ
うに書くことができる。
Throughout the specification and drawings, the symbol * on the right shoulder indicates the negative direction of the crystal axis.
Therefore, according to the usual notation, for example, [101 * 0],
[112 * 0] and (101 * 0) can be written as the following equations (1) to (3).

【0010】[0010]

【数1】 (Equation 1)

【0011】したがって、Zカット水晶基板を用いれ
ば、安価な水晶基板の上にInxGayAlzN層を形成
することが可能になり、青色光や紫外線を出射する発光
ダイオードやレーザーダイオード等の半導体発光素子を
安価に製造することができる。
Therefore, if a Z-cut quartz substrate is used, an InxGayAlzN layer can be formed on an inexpensive quartz substrate, and semiconductor light-emitting elements such as light-emitting diodes and laser diodes that emit blue light or ultraviolet light can be manufactured at low cost. Can be manufactured.

【0012】また、本発明の半導体発光素子は、Inx
GayAlzN(ただし、x+y+z=1、0≦x≦1、
0≦y≦1、0≦z≦1)で表わされる化合物半導体を
用いた半導体発光素子において、Zカット水晶基板の上
にZnO薄膜又はAlN薄膜を形成し、当該薄膜の上に
InxGayAlzN層を形成したことを特徴としてい
る。
Further, the semiconductor light emitting device of the present invention comprises Inx
GayAlzN (where x + y + z = 1, 0 ≦ x ≦ 1,
In a semiconductor light emitting device using a compound semiconductor represented by 0 ≦ y ≦ 1, 0 ≦ z ≦ 1), a ZnO thin film or an AlN thin film is formed on a Z-cut quartz substrate, and an InxGayAlzN layer is formed on the thin film. It is characterized by doing.

【0013】この半導体発光装置にあっては、Zカット
水晶基板の上にバッファ層としてZnO薄膜又はAlN
薄膜を形成しているので、その上に形成されるInxG
ayAlzN層の格子不整合をよりいっそう小さくするこ
とができる。よって、青色光や紫外線を出射する、より
いっそう良質な発光ダイオードやレーザーダイオード等
の半導体発光素子を製造することができる。
In this semiconductor light emitting device, a ZnO thin film or AlN is used as a buffer layer on a Z-cut quartz substrate.
Since a thin film is formed, InxG
The lattice mismatch of the ayAlzN layer can be further reduced. Therefore, a semiconductor light-emitting element such as a light-emitting diode or a laser diode, which emits blue light or ultraviolet light, of higher quality can be manufactured.

【0014】[0014]

【発明の実施の形態】(第1の実施形態)図1は本発明
の一実施形態による半導体発光素子1であって、InG
aN層5を発光層とする発光ダイオードや面発光型レー
ザーダイオード等を表わしている。この半導体発光素子
1は、Zカット水晶基板2の上に六方晶系のn−GaN
薄膜3を形成し、n−GaN層3の上にn−AlGaN
層4、InGaN層5、p−AlGaN層6、p−Ga
N層7を順次成長させている。n−AlGaN層4、I
nGaN層5、p−AlGaN層6及びGaN層7をエ
ッチングすることによりn−GaN層3を一部露出さ
せ、p−GaN層7の上面に上部電極8を設け、n−G
aN層3の上面に下部電極9を形成している。しかし
て、p−AlGaN層6に設けられた上部電極8とn−
GaN層3に設けられた下部電極9との間に直流電圧を
印加すると、上部電極8と下部電極9の間に電流が流
れ、上部電極8からInGaN層5に電流が注入されて
発光し、InGaN層5から出た光はp−GaN層7の
上面の上部電極8が設けられていない領域から外部へ出
射される。
(First Embodiment) FIG. 1 shows a semiconductor light emitting device 1 according to an embodiment of the present invention.
A light emitting diode or a surface emitting laser diode using the aN layer 5 as a light emitting layer is shown. This semiconductor light emitting device 1 has a hexagonal n-GaN
A thin film 3 is formed, and n-AlGaN is formed on the n-GaN layer 3.
Layer 4, InGaN layer 5, p-AlGaN layer 6, p-Ga
The N layer 7 is sequentially grown. n-AlGaN layer 4, I
By etching the nGaN layer 5, the p-AlGaN layer 6, and the GaN layer 7, the n-GaN layer 3 is partially exposed, and an upper electrode 8 is provided on the upper surface of the p-GaN layer 7, and the n-G
A lower electrode 9 is formed on the upper surface of the aN layer 3. Thus, the upper electrode 8 provided on the p-AlGaN layer 6 and the n-
When a DC voltage is applied between the lower electrode 9 provided on the GaN layer 3 and a current flows between the upper electrode 8 and the lower electrode 9, a current is injected from the upper electrode 8 into the InGaN layer 5 to emit light, Light emitted from the InGaN layer 5 is emitted to the outside from a region on the upper surface of the p-GaN layer 7 where the upper electrode 8 is not provided.

【0015】ここで、Zカット水晶基板とGaNとの格
子定数と面間隔について述べる。図2(b)に示すよう
に、六方晶系のGaN薄膜の[1000]方向の格子定
数aと[0100]方向の格子定数b(b軸方向の格子
定数)は、a=b=3.1860Åで、[101*0]方
向の長さmと[112*0]方向の長さnは、それぞれ
m=2.7592Å、n=1.5930Åである。また、
三方晶系の水晶は、六方晶と同じように六回対称軸をも
ち、図2(a)に示すように六方晶系と同じように表わ
されるため、ここでの方位のとり方も六方晶系と同じ表
わし方をする。Zカット水晶の[1000]方向の格子
定数A(a軸方向の格子定数)と[0100]方向の格
子定数B(b軸方向の格子定数)は、A=B=4.91
31Å、[101*0]方向の長さMと[112*0]方
向の長さNはそれぞれM=4.2549Å、N=2.45
66Åである。よって、[1000]方向及び[010
0]方向においては、Zカット水晶基板の格子定数Aと
GaNの格子定数aの比は、小さな整数比でほぼA:a
=3:2で表され、(101*0)の距離と(112*
0)の距離についても、Zカット水晶基板の格子定数B
とGaNの格子定数bの比は、同じくほぼB:b=3:
2で表される。言い換えると、六方晶系のGaN薄膜の
(2000)の距離(矢印の長さ:a/2)は1.59
30Å、Zカット水晶基板2の(3000)の距離(矢
印の長さ:A/3)における格子定数は1.6377Å
と、ほぼ等しくなる。同様に、六方晶系のGaN薄膜の
(202*0)の距離(矢印の長さ:m/2)は1.37
95Å、Zカット水晶基板2の(303*0)の距離
(矢印の長さ:M/3)は1.4183Åと、ほぼ等し
くなる。また、GaNの(224*0)の距離(矢印の
長さ:n/2)は0.7965Å、Zカット水晶の(3
36*0)の距離(矢印の長さ:N/3)は0.8189
Åとほぼ等しくなる。したがって、Zカット水晶基板の
(3000)の距離とGaN薄膜の(2000)の距離
とは、3%以内で一致する。また、Zカット水晶基板の
(303*0)の距離とGaN薄膜の(202*0)の距
離も、3%以内で一致する。さらに、GaNの(224
*0)の距離とZカット水晶基板の(336*0)の距離
も3%以内で一致する。
Here, the lattice constant and the spacing between the Z-cut quartz substrate and GaN will be described. As shown in FIG. 2B, the lattice constant a in the [1000] direction and the lattice constant b in the [0100] direction (lattice constant in the b-axis direction) of the hexagonal GaN thin film are a = b = 3. At 1860 °, the length m in the [101 * 0] direction and the length n in the [112 * 0] direction are m = 2.7592 ° and n = 1.5930 °, respectively. Also,
The trigonal crystal has a six-fold symmetry axis similarly to the hexagonal crystal, and is represented in the same manner as the hexagonal crystal as shown in FIG. 2 (a). The same notation is used. The lattice constant A (lattice constant in the a-axis direction) of the Z-cut quartz crystal in the [1000] direction and the lattice constant B (lattice constant in the b-axis direction) in the [0100] direction are A = B = 4.91.
31 °, the length M in the [101 * 0] direction and the length N in the [112 * 0] direction are M = 4.2549 ° and N = 2.45, respectively.
66 °. Therefore, [1000] direction and [010]
In the [0] direction, the ratio between the lattice constant A of the Z-cut quartz substrate and the lattice constant a of GaN is approximately A: a with a small integer ratio.
= 3: 2, the distance of (101 * 0) and (112 *
0), the lattice constant B of the Z-cut quartz substrate
And the lattice constant b of GaN is also approximately B: b = 3:
It is represented by 2. In other words, the distance of (2000) (length of arrow: a / 2) of the hexagonal GaN thin film is 1.59.
The lattice constant of the Z-cut quartz substrate 2 at a distance of (3000) (length of an arrow: A / 3) of 30 ° is 1.6377 °.
And it is almost equal. Similarly, the distance (length of arrow: m / 2) of (202 * 0) of the hexagonal GaN thin film is 1.37.
95 °, the distance (length of arrow: M / 3) of (303 * 0) of the Z-cut quartz substrate 2 is almost equal to 1.4183 °. Further, the distance of 224 * 0 (length of arrow: n / 2) of GaN is 0.7965 °, and the distance of Z
36 * 0) (length of arrow: N / 3) is 0.8189
It is almost equal to Å. Therefore, the distance of (3000) of the Z-cut quartz substrate and the distance of (2000) of the GaN thin film match within 3%. Also, the distance of (303 * 0) of the Z-cut quartz substrate and the distance of (202 * 0) of the GaN thin film match within 3%. Furthermore, GaN (224
The distance of (* 0) and the distance of (336 * 0) of the Z-cut quartz substrate also match within 3%.

【0016】従って、Zカット水晶基板2のZ面上にc
軸配向の六方晶系GaN薄膜を成長させることにより、
図3に示すように良質な結晶性のn−GaN層3を得る
ことができる。そして、このいずれかのn−GaN層3
の上にn−AlGaN層4、InGaN層5、p−Al
GaN層6、p−GaN層7を成長させることにより、
安価な水晶基板2を用いて効率のよい青色ダイオードや
紫外線ダイオード等の半導体発光素子1を製造すること
が可能になる。
Therefore, c is placed on the Z surface of the Z-cut quartz substrate 2.
By growing an axially oriented hexagonal GaN thin film,
As shown in FIG. 3, a high-quality crystalline n-GaN layer 3 can be obtained. Then, any of the n-GaN layers 3
N-AlGaN layer 4, InGaN layer 5, p-Al
By growing the GaN layer 6 and the p-GaN layer 7,
It is possible to manufacture an efficient semiconductor light emitting device 1 such as a blue diode or an ultraviolet diode using an inexpensive crystal substrate 2.

【0017】(第2の実施形態)図4に示すものは本発
明の別な実施形態による半導体発光素子11を示す断面
図である。この半導体発光素子11にあっては、Zカッ
ト水晶基板2の上にZnO膜12を形成し、ZnO膜1
2の上にn−GaN層3、n−AlGaN層4、InG
aN層5、p−AlGaN層6、p−GaN層7を順次
成長させている。さらに、n−AlGaN層4、InG
aN層5、p−AlGaN層6及びp−GaN層7をエ
ッチングすることによりn−GaN層3を一部露出さ
せ、p−GaN層7の上面に上部電極8を設け、n−G
aN層3の上面に下部電極9を形成している(あるい
は、ZnO膜12を不純物ドープにより低抵抗化し、Z
nO膜12の上に下部電極9を形成してもよい)。
(Second Embodiment) FIG. 4 is a sectional view showing a semiconductor light emitting device 11 according to another embodiment of the present invention. In this semiconductor light emitting device 11, a ZnO film 12 is formed on a Z-cut quartz substrate 2, and a ZnO film 1 is formed.
2, n-GaN layer 3, n-AlGaN layer 4, InG
The aN layer 5, the p-AlGaN layer 6, and the p-GaN layer 7 are sequentially grown. Further, the n-AlGaN layer 4, InG
The n-GaN layer 3 is partially exposed by etching the aN layer 5, the p-AlGaN layer 6, and the p-GaN layer 7, and the upper electrode 8 is provided on the upper surface of the p-GaN layer 7, and the n-G
The lower electrode 9 is formed on the upper surface of the aN layer 3 (or the resistance of the ZnO film 12 is reduced by impurity doping,
The lower electrode 9 may be formed on the nO film 12).

【0018】六方晶系のZnO膜12の格子定数aは
3.24265ÅでGaNの格子定数(a定数:3.18
6Å)に近いので、Zカット水晶基板2の上にバッファ
層としてZnO膜12を形成することにより、よりいっ
そう良好なn−GaN層3を形成することができ、より
良好な青色ないし紫外線ダイオード等の発光素子11を
製造することができる。
The lattice constant a of the hexagonal ZnO film 12 is 3.24265 ° and the lattice constant of GaN (a constant: 3.18)
6Å), a better n-GaN layer 3 can be formed by forming the ZnO film 12 as a buffer layer on the Z-cut quartz substrate 2, and a better blue or ultraviolet diode or the like can be formed. Can be manufactured.

【0019】(第3の実施形態)図5に示すものは本発
明のさらに別な実施形態による半導体発光素子13を示
す断面図である。この半導体発光素子13にあっては、
Zカット水晶基板2の上にAlN膜14を形成し、Al
N膜14の上にn−GaN層3、n−AlGaN層4、
InGaN層5、p−AlGaN層6、p−GaN層7
を順次成長させている。さらに、n−AlGaN層4、
InGaN層5、p−AlGaN層6及びp−GaN層
7をエッチングすることによりn−GaN層3を一部露
出させ、p−GaN層7の上面に上部電極8を設け、n
−GaN層3の上面に下部電極9を形成している(ある
いは、AlN膜14を不純物ドープにより低抵抗化し、
AlN膜14の上に下部電極9を形成してもよい)。
(Third Embodiment) FIG. 5 is a sectional view showing a semiconductor light emitting device 13 according to still another embodiment of the present invention. In this semiconductor light emitting element 13,
An AlN film 14 is formed on a Z-cut quartz substrate 2,
On the N film 14, the n-GaN layer 3, the n-AlGaN layer 4,
InGaN layer 5, p-AlGaN layer 6, p-GaN layer 7
Are growing sequentially. Further, the n-AlGaN layer 4,
The n-GaN layer 3 is partially exposed by etching the InGaN layer 5, p-AlGaN layer 6, and p-GaN layer 7, and an upper electrode 8 is provided on the upper surface of the p-GaN layer 7,
Forming a lower electrode 9 on the upper surface of the GaN layer 3 (or lowering the resistance of the AlN film 14 by impurity doping,
The lower electrode 9 may be formed on the AlN film 14).

【0020】AlN膜14の格子定数は3.1113Å
でGaNの格子定数(a定数:3.186Å)に近いの
で、Zカット水晶基板2の上にバッファ層としてAlN
膜14を形成することにより、よりいっそう良好なn−
GaN層3を形成することができ、より良好な青色ない
し紫外線ダイオード等の発光素子13を製造することが
できる。
The lattice constant of the AlN film 14 is 3.1113 °
Is close to the lattice constant of GaN (a constant: 3.186 °).
By forming the film 14, an even better n-
The GaN layer 3 can be formed, and a better light emitting element 13 such as a blue or ultraviolet diode can be manufactured.

【0021】なお、上記各実施形態では、面発光型の発
光素子を図示したが、レーザーダイオードや端面出射型
の発光ダイオードにも本発明を適用できることはいうま
でもない。
In each of the above embodiments, the surface-emitting type light-emitting element is illustrated, but it is needless to say that the present invention can be applied to a laser diode or an edge-emitting type light-emitting diode.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の一実施形態による半導体発光素子を示
す断面図である。
FIG. 1 is a cross-sectional view illustrating a semiconductor light emitting device according to an embodiment of the present invention.

【図2】(a)はZカット水晶基板の単位格子を示す
図、(b)はGaNの単位格子を示す図である。
2A is a diagram illustrating a unit lattice of a Z-cut quartz substrate, and FIG. 2B is a diagram illustrating a unit lattice of GaN.

【図3】Zカット水晶基板の上に成長したGaNの結晶
構造を示す図である。
FIG. 3 is a diagram showing a crystal structure of GaN grown on a Z-cut quartz substrate.

【図4】本発明の別な実施形態による半導体発光素子を
示す断面図である。
FIG. 4 is a sectional view showing a semiconductor light emitting device according to another embodiment of the present invention.

【図5】本発明のさらに別な実施形態による半導体発光
素子を示す断面図である。
FIG. 5 is a cross-sectional view illustrating a semiconductor light emitting device according to another embodiment of the present invention.

【符号の説明】[Explanation of symbols]

2 Zカット水晶基板 3 n−GaN層 5 InGaN層(発光層) 12 ZnO膜 14 AlN膜 2 Z-cut quartz substrate 3 n-GaN layer 5 InGaN layer (light emitting layer) 12 ZnO film 14 AlN film

─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───

【手続補正書】[Procedure amendment]

【提出日】平成13年10月3日(2001.10.
3)
[Submission date] October 3, 2001 (2001.10.
3)

【手続補正1】[Procedure amendment 1]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】発明の名称[Correction target item name] Name of invention

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【発明の名称】半導体発光素子 [Title of the Invention] Semiconductor light emitting device

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 InxGayAlzN(ただし、x+y+
z=1、0≦x≦1、0≦y≦1、0≦z≦1)で表わ
される化合物半導体を用いた半導体発光素子において、
Zカット水晶基板の上にZnO薄膜又はAlN薄膜を形
成し、当該薄膜の上にInxGayAlzN層を形成した
ことを特徴とする半導体発光素子。
1. InxGayAlzN (where x + y +
In a semiconductor light emitting device using a compound semiconductor represented by z = 1, 0 ≦ x ≦ 1, 0 ≦ y ≦ 1, 0 ≦ z ≦ 1,
A semiconductor light emitting device comprising: a ZnO thin film or an AlN thin film formed on a Z-cut quartz substrate; and an InxGayAlzN layer formed on the thin film.
JP2001306429A 2001-10-02 2001-10-02 Semiconductor light emitting device Expired - Fee Related JP3387491B2 (en)

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JP2001306429A JP3387491B2 (en) 2001-10-02 2001-10-02 Semiconductor light emitting device

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP23059998A Division JP3289682B2 (en) 1998-08-17 1998-08-17 Semiconductor light emitting device

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Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8866374B2 (en) 2010-04-09 2014-10-21 Lg Innotek Co., Ltd. Light emitting device having a multilayer re-emission layer and light emitting device package including the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8866374B2 (en) 2010-04-09 2014-10-21 Lg Innotek Co., Ltd. Light emitting device having a multilayer re-emission layer and light emitting device package including the same

Also Published As

Publication number Publication date
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