JPS6369288A - Manufacture of semiconductor laser device - Google Patents
Manufacture of semiconductor laser deviceInfo
- Publication number
- JPS6369288A JPS6369288A JP21483186A JP21483186A JPS6369288A JP S6369288 A JPS6369288 A JP S6369288A JP 21483186 A JP21483186 A JP 21483186A JP 21483186 A JP21483186 A JP 21483186A JP S6369288 A JPS6369288 A JP S6369288A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- type
- becomes
- etching
- semiconductor layer
- 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.)
- Pending
Links
- 239000004065 semiconductor Substances 0.000 title claims description 26
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 238000005530 etching Methods 0.000 claims abstract description 29
- 239000000758 substrate Substances 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 2
- 229910001218 Gallium arsenide Inorganic materials 0.000 abstract description 3
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 238000005253 cladding Methods 0.000 description 10
- 239000000243 solution Substances 0.000 description 8
- 229920002120 photoresistant polymer Polymers 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 230000010261 cell growth Effects 0.000 description 1
- 238000000407 epitaxy Methods 0.000 description 1
- 230000012010 growth Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
Landscapes
- Semiconductor Lasers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、半導体レーザ装置の製造に係υ、特に電流
狭窄層のエツチング材に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to the manufacture of semiconductor laser devices, and particularly to an etching material for a current confinement layer.
第3図は従来の実屈折率導波形半導体レーザ装置の構造
を示すVr面図である。N形GaAs基板(1)上にク
ラッド層となるN形Ga1−zAlzAs、す(2)、
活性層となるGa1−yAlyAs 層[3)、クラッ
ド】となるP形Gax−zAl xAa )J (41
、電流狭窄層となるN形Ga l−u At uAsM
l+51(ただし、O≦y<x、x、uかつz(u)を
順次Jピタ+シャル成長により形成し、このN形Ga1
−uAlu〜8層(5)上にフォトレジストによりパタ
ーニンジを行ない、H2SO,系等のエツチング液によ
りp形Gal−mA1gAs層(4)が露出するまで除
去し、フォトレジストを除去した後にP形Ga1−マA
1vAs層(v<u)(7)をエピタ+シャル成長させ
、内部ストライプ構造を形成した。FIG. 3 is a Vr plane view showing the structure of a conventional real refractive index waveguide semiconductor laser device. N-type Ga1-zAlzAs, which becomes a cladding layer, on the N-type GaAs substrate (1) (2),
Ga1-yAlyAs layer [3) which becomes the active layer, P-type Gax-zAl xAa ) J (41
, N-type Ga lu At uAsM which becomes the current confinement layer
l+51 (where O≦y<x, x, u and z(u) are sequentially formed by J pita + crystal growth, and this
-UAlu ~ 8 layer (5) is patterned with photoresist, and removed with an etching solution such as H2SO, etc. until the p-type Gal-mA1gAs layer (4) is exposed, and after removing the photoresist, the P-type Ga1 - Ma A
A 1vAs layer (v<u) (7) was epitetally grown to form an internal stripe structure.
上記のような従来の実屈折率導波形半導体レーザ装置の
製造方法では、クラッド層であるP形Gax−xAlx
As層(4)と電流狭窄層であるN形Ga1−uAlu
As層(5)に対してエツチングレートのないH2SO
4系等のエツチング液を使用している念め、エツチング
量を時間で制御することになシ、P形G魯l−2Alx
As層(4)まで侵されたシ、逆に電流狭窄層であるN
形Ga1−uAluAs層(5)が除去しきれなかつf
c勺する事態が発生し、内部ストライプ構造を再現性良
く作製することが極めて困難であった。In the conventional manufacturing method of a real refractive index waveguide semiconductor laser device as described above, the cladding layer P-type Gax-xAlx
As layer (4) and current confinement layer N-type Ga1-uAlu
H2SO with no etching rate for As layer (5)
If you are using an etching solution such as 4 series, do not control the etching amount by time.
The As layer (4) was also attacked, and conversely, the N layer, which is the current confinement layer,
If the Ga1-uAluAs layer (5) is not completely removed and f
This resulted in an extremely difficult situation in which the internal stripe structure was produced with good reproducibility.
この発明は、上記のような従来の欠点を解決するために
なされたもので、良質な電流狭窄層を再現性良く作製す
ることを目的とする。This invention was made to solve the above-mentioned conventional drawbacks, and aims to produce a high-quality current confinement layer with good reproducibility.
この半導体レーザ装置に係る半導体レーザ装置の製造方
法は、クラッド層となるP形Ge1−zAlxAs層よ
りも電流狭窄層となるN形Ga1−uAluAs層に対
して大きなエツチングレートを示すエツチング材を用い
て、P形Ga 1−xAl xAs層の少なくとも一部
分をエツチング液去することで内部ストライプ構造を形
成するものである。A method for manufacturing a semiconductor laser device according to this semiconductor laser device uses an etching material that exhibits a larger etching rate for an N-type Ga1-uAluAs layer that will become a current confinement layer than for a P-type Ge1-zAlxAs layer that will become a cladding layer. , an internal stripe structure is formed by removing at least a portion of the P-type Ga 1-xAl xAs layer with an etching solution.
この発明においては、クラッド層となるP形G@x−x
AlzAs層よりも電流狭窄層となるN形Ga l −
uAluAs層に対して大きなエツチングレートを示す
エツチング材を用いるので、電流狭窄層となるN形G5
1−uAluAs層のみを選択的にエツチングすること
ができる。In this invention, P-type G@x-x which becomes the cladding layer
N-type Gal − becomes a current confinement layer rather than the AlzAs layer.
Since an etching material with a large etching rate is used for the uAluAs layer, the N-type G5 which becomes the current confinement layer is used.
Only the 1-uAluAs layer can be selectively etched.
以下、この発明の一実施例を図について説明する。第1
図は本発明の一実施例による半導体レーザ装置の製造方
法を工程順に示す。第1図(、)に示すようにN形Ga
As基板tll上に、順次、クラッド層となるN形Ga
1−!AILka(2)、活性層となるGa : −y
AlyAs層(3)、クラッド層となるP形Ga1−s
AlzAs層(4)、電流狭窄層となるN形Ga1−u
AluAs層(6)(ただし、0≦yくx、かつy=0
.1.かつs−0,5,かつu=0.3)を順次エピタ
キシセル成長によシ形成し、このN形GILI−uAl
uAs層(5)上にフォトレジストによシパターニンジ
を行う。次に第1図(b)に示すように28%もとてP
形GAI−gAlzAa層(4)が露出するまでエツチ
ング液去する。さらに、第1図(6)に示すように、フ
ォトレジストを除去した後にP形Ga1−vAlvAs
層(Y<u)(7)を成長させ、内部ストライプ構造を
形成する。An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure shows a method of manufacturing a semiconductor laser device according to an embodiment of the present invention in the order of steps. As shown in Figure 1(,), N-type Ga
On the As substrate tll, N-type Ga is sequentially formed as a cladding layer.
1-! AILka (2), Ga forming active layer: -y
AlyAs layer (3), P-type Ga1-s that becomes the cladding layer
AlzAs layer (4), N-type Ga1-u which becomes the current confinement layer
AluAs layer (6) (0≦yx, and y=0
.. 1. and s-0.5, and u=0.3) by epitaxy cell growth, and this N-type GILI-uAl
A photoresist patterning is performed on the uAs layer (5). Next, as shown in Figure 1(b), 28%
The etching solution is removed until the GAI-gAlzAa layer (4) is exposed. Furthermore, as shown in FIG. 1 (6), after removing the photoresist, P-type Ga1-vAlvAs
A layer (Y<u) (7) is grown to form an internal stripe structure.
上記のような工程を含んだ半導体レーザ装置の製造方法
を用いると、第2図に示すように、前述のNH2OH−
H2o2系エッチング液(γ=20)がN形Ga1−u
AluAs層+5Bu=0.3)に対しては、5.2μ
m/―という速いエツチング液度を示すのに対し、P形
Ga 1−zAl xAs Rf4) (z = 0.
5 )に対しては0.15μm/mとなりほとんどエツ
チングしない(電子通信学会技術研究報告SSD 73
−80よシ引用)。このため、クラッド層であるP形G
a1−xAlzAs層(4)をほとんど侵すことなく、
電流狭窄層であるN形Ga1−uAluAs、寮(6)
を確実に除去することができ、再現性よく内部ストライ
プ構造を形成できる。When the method for manufacturing a semiconductor laser device including the steps described above is used, as shown in FIG.
H2o2 based etching solution (γ=20) is N type Ga1-u
5.2 μ for AluAs layer + 5Bu = 0.3)
m/-, whereas P-type Ga 1-zAl x As Rf4) (z = 0.
5), it is 0.15 μm/m and there is almost no etching (IEICE technical research report SSD 73
-80 (quote). For this reason, the P-type G which is the cladding layer
without almost attacking the a1-xAlzAs layer (4),
N-type Ga1-uAluAs current confinement layer, dormitory (6)
can be removed reliably and an internal stripe structure can be formed with good reproducibility.
なお、上記実施例では、エツチング液として28%Nf
!4OH水溶液と30%H,02水溶液を容積比で1
: 20に混合したものを例に挙げたが、異なる濃度の
水溶液を用いた場合でも、また異なる混合比を用いた場
合でも同様の効果が得られる場合がある。また、上記例
では、A1組成比としてx=0.5 、 u=0.3と
したが、実際には工Nuである場合のすべてに適用し得
る。エツチング材の液温においても、30℃以外でも有
効である。また、材料やエツチング液法はこれに限るも
のではない。In the above example, 28%Nf was used as the etching solution.
! 4OH aqueous solution and 30% H,02 aqueous solution at a volume ratio of 1
: 20 was taken as an example, but the same effect may be obtained even if an aqueous solution of a different concentration or a different mixing ratio is used. Further, in the above example, the A1 composition ratio is x=0.5 and u=0.3, but it can actually be applied to all cases where the A1 composition ratio is 0.5 and u=0.3. It is also effective at liquid temperatures of etching materials other than 30°C. Furthermore, the materials and etching solution methods are not limited to these.
この発明は以上説明したとお9、クラッド層となるP形
Ga1−vAlzAs層よ)も電流狭窄層となるN形G
ax−uAluAs層に対して大きなエツチングレート
を示すエツチング材を用いるので、電流狭窄層となるN
形Ga1−uAluAa層のみを選択的にエッチツクで
きる効果がある。As explained above, in this invention, the P-type Ga1-vAlzAs layer which becomes the cladding layer also has an N-type G layer which becomes the current confinement layer.
Since an etching material with a large etching rate is used for the ax-uAluAs layer, N
This has the effect of selectively etching only the Ga1-uAluAa layer.
第1図は、この発明の一実施例による半導体レーザ装置
の製造方法を示す工程別断面図、第2図d NH4OH
−H,02系x ツチ:/ジ液(r=20)のエツチン
グレートのグラフ、第3図は従来の実屈折率導波形半導
体レーザ装置の断面図である。1はN形GaAs基板、
2はクラッド層となるN形Ga1−話1xAa層、3は
活性層となるGa1−yAlyAs層、4はクラッド層
となるGal−gAlxA一層、5は電流狭窄層となる
N形Ga1−uAluAs層、6は7オトレジストマス
ク、7はP形GBx−vAlvAs層である。なお、各
図中の同一符号は同一または相当部分を示す。FIG. 1 is a cross-sectional view of each process showing a method for manufacturing a semiconductor laser device according to an embodiment of the present invention, and FIG. 2d is a NH4OH
FIG. 3 is a graph of the etching rate of -H,02 series x ts/di solution (r=20), and is a cross-sectional view of a conventional real refractive index waveguide semiconductor laser device. 1 is an N-type GaAs substrate,
2 is an N-type Ga1-1xAa layer which becomes a cladding layer, 3 is a Ga1-yAlyAs layer which is an active layer, 4 is a Gal-gAlxA layer which is a cladding layer, 5 is an N-type Ga1-uAluAs layer which is a current confinement layer, Reference numeral 6 indicates a 7 photoresist mask, and 7 indicates a P-type GBx-vAlvAs layer. Note that the same reference numerals in each figure indicate the same or corresponding parts.
Claims (4)
体層と、前記第1の禁制帯幅よりも小さい第2の禁制帯
幅を持つ第2の半導体層と、前記第2の禁制帯幅よりも
大きい第3の禁制帯幅を持つ第3の半導体層と、前記第
2の禁制帯幅よりも大きい第4の禁制帯幅を持つ第4の
半導体層を順次形成する工程と、前記第3の半導体層よ
りも前記第4の半導体層に対して大きなエッチングレー
トを示すエッチング材を用いて、前記第4の半導体層の
少なくとも一部分をエッチング除去する工程を含む半導
体レーザ装置の製造方法。(1) A first semiconductor layer having a first forbidden band width, a second semiconductor layer having a second forbidden band width smaller than the first forbidden band width, and a first semiconductor layer having a first forbidden band width, on a substrate crystal; A third semiconductor layer having a third forbidden band width larger than the second forbidden band width and a fourth semiconductor layer having a fourth forbidden band width larger than the second forbidden band width are sequentially formed. and a step of etching away at least a portion of the fourth semiconductor layer using an etching material that exhibits a higher etching rate for the fourth semiconductor layer than for the third semiconductor layer. manufacturing method.
なるように形成する工程を含む特許請求の範囲第1項記
載の半導体レーザ装置の製造方法。(2) The method for manufacturing a semiconductor laser device according to claim 1, which includes the step of forming the fourth forbidden band width to be smaller than the third forbidden band width.
、第2の半導体層をGa_1_−_yAl_yAs、第
3の半導体層をGa_1_−_zAl_zAs、第4の
半導体層をGa_1_−_uAl_uAs(ただし、0
≦y<x、z、uかつu<z)で形成する工程を含む特
許請求の範囲第2項記載の半導体レーザ装置の製造方法
。(3) The first semiconductor layer is made of Ga_1_-_xAl_xAs
, the second semiconductor layer is Ga_1_-_yAl_yAs, the third semiconductor layer is Ga_1_-_zAl_zAs, and the fourth semiconductor layer is Ga_1_-_uAl_uAs (however, 0
3. The method of manufacturing a semiconductor laser device according to claim 2, including a step of forming a semiconductor laser device such that ≦y<x, z, u and u<z.
2系エッチング液を用いる工程を含む特許請求の範囲第
3項記載の半導体レーザ装置の製造方法。(4) As an etching material, NH_4OH-H_2O_
4. The method of manufacturing a semiconductor laser device according to claim 3, which includes a step of using a two-system etching solution.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21483186A JPS6369288A (en) | 1986-09-10 | 1986-09-10 | Manufacture of semiconductor laser device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21483186A JPS6369288A (en) | 1986-09-10 | 1986-09-10 | Manufacture of semiconductor laser device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6369288A true JPS6369288A (en) | 1988-03-29 |
Family
ID=16662260
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21483186A Pending JPS6369288A (en) | 1986-09-10 | 1986-09-10 | Manufacture of semiconductor laser device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6369288A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010048085A (en) * | 2009-12-04 | 2010-03-04 | Oiles Eco Corp | Louver device |
-
1986
- 1986-09-10 JP JP21483186A patent/JPS6369288A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010048085A (en) * | 2009-12-04 | 2010-03-04 | Oiles Eco Corp | Louver device |
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