JPH06216045A - Vapor growth device - Google Patents
Vapor growth deviceInfo
- Publication number
- JPH06216045A JPH06216045A JP802493A JP802493A JPH06216045A JP H06216045 A JPH06216045 A JP H06216045A JP 802493 A JP802493 A JP 802493A JP 802493 A JP802493 A JP 802493A JP H06216045 A JPH06216045 A JP H06216045A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- reaction
- wall
- vapor phase
- crystal 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
Links
Landscapes
- Chemical Vapour Deposition (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、例えばヘテロ構造の化
合物半導体等の製造に用いられる気相成長装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vapor phase growth apparatus used for manufacturing, for example, a compound semiconductor having a hetero structure.
【0002】[0002]
【従来の技術】図3は、従来の気相成長装置の構造を示
す概略図である。従来の気相成長装置は、反応管1と下
部フランジ8により構成される反応炉内に結晶基板2を
載置するサセプタ3と、一端にサセプタ3を着脱自在に
支持し、他端が回転駆動装置(図示省略)に接続される
支持棒4と、結晶基板2を加熱するために設けられるヒ
ータ5とを具備する。また、反応管1内の結晶基板2の
上方にはハニカム等の整流板6が配設され、さらにその
上方には、ガス導入口7が設けられている。一方、反応
管1は下部フランジ8上にOリング9を介して着脱自在
に密着されており、この下部フランジ8には排気口10
が設けられ、この排気口10の一端には排気装置(図示
省略)が接続されている。2. Description of the Related Art FIG. 3 is a schematic view showing the structure of a conventional vapor phase growth apparatus. A conventional vapor phase growth apparatus includes a susceptor 3 for mounting a crystal substrate 2 in a reaction furnace composed of a reaction tube 1 and a lower flange 8, and a susceptor 3 detachably supported at one end and rotationally driven at the other end. It comprises a support rod 4 connected to a device (not shown) and a heater 5 provided for heating the crystal substrate 2. A rectifying plate 6 such as a honeycomb is provided above the crystal substrate 2 in the reaction tube 1, and a gas inlet 7 is provided above the rectifying plate 6. On the other hand, the reaction tube 1 is detachably attached to the lower flange 8 through an O-ring 9, and the exhaust port 10 is attached to the lower flange 8.
Is provided, and an exhaust device (not shown) is connected to one end of the exhaust port 10.
【0003】上記のように構成された気相成長装置にお
いて、結晶基板2をヒータ5の加熱により所定の温度に
上昇させるとともに、回転駆動装置により所定の回転数
で回転させ、ガス導入口7より反応管1内に供給され、
整流板6を介して整流された原料ガス(例えばAs
H3 ,PH3 )及びキャリアガス(例えばH2 )によ
り、結晶基板2上に、半導体の薄膜を気相成長させる。In the vapor phase growth apparatus constructed as described above, the crystal substrate 2 is heated to a predetermined temperature by heating by the heater 5 and is rotated at a predetermined rotation speed by the rotation driving device, and the gas is introduced from the gas introduction port 7. Is supplied into the reaction tube 1,
Raw gas rectified via the rectifying plate 6 (for example, As
H 3 and PH 3 ) and a carrier gas (for example, H 2 ) are used to vapor-deposit a semiconductor thin film on the crystal substrate 2.
【0004】ところで、上記した気相成長時には、反応
管1の内壁も加熱されて高温となるので、反応管1の内
壁にも反応生成物11が堆積し、成長回数を重ねるごと
に厚くなる。そして、堆積した反応生成物11の一部が
剥離し、粉塵となって、気相成長中の結晶基板2上に落
下し、薄膜の膜厚が不均一となったり、薄膜の組成が変
わってしまう。このため、所定回数気相成長を行った後
に、反応管1を下部フランジ8から分割し取り外して、
その内壁を洗浄し、堆積した反応生成物11を除去した
後再び下部フランジ8に接続し、吸着ガスを脱ガスする
必要がある。この脱ガスを行うのは、気相成長中に原料
ガス以外に、例えば、空気中の酸素が反応管1内に取り
込まれることにより、薄膜の組成が変わってしまうのを
防止するためである。また、反応管1が例えば金属製の
場合は、重量が重く取扱いが厄介なため、反応管1の内
壁面に堆積した有害な反応生成物11が大気中に拡散さ
れる危険性があり、安全性に問題がある。By the way, during the vapor phase growth, the inner wall of the reaction tube 1 is also heated to a high temperature, so that the reaction product 11 is deposited on the inner wall of the reaction tube 1 and becomes thicker as the number of times of growth increases. Then, a part of the deposited reaction product 11 is peeled off, becomes dust, and falls onto the crystal substrate 2 undergoing vapor phase growth, resulting in nonuniform film thickness or change in thin film composition. I will end up. Therefore, after performing the vapor phase growth a predetermined number of times, the reaction tube 1 is divided from the lower flange 8 and removed,
It is necessary to wash the inner wall thereof, remove the deposited reaction product 11, and then connect the lower flange 8 again to degas the adsorbed gas. This degassing is performed to prevent the composition of the thin film from being changed by the incorporation of oxygen in the air into the reaction tube 1 in addition to the source gas during vapor phase growth. If the reaction tube 1 is made of metal, for example, it is heavy and difficult to handle, and there is a risk that harmful reaction products 11 deposited on the inner wall surface of the reaction tube 1 may diffuse into the atmosphere. There is a problem with sex.
【0005】そこで、本発明者は、先に(特願平3−3
07917号)、図4に示すように、反応管1の内壁近
傍に反応生成物11を堆積させるための遮蔽管12を設
けることを提案している。遮蔽管12は、石英ガラス等
からなる円筒構造を有し、反応管1の内壁にネジ止め等
により固定されている支持板13により支持されてい
る。これにより、気相成長時には、上記した遮蔽管12
が加熱されて高温になるため、遮蔽管12上で結晶成長
して反応生成物11が堆積し、反応管1の内壁に直接反
応生成物11が堆積するのを防止することができる。し
かも、気相成長を所定回数行った後、反応管1を下部フ
ランジ8から分離し、遮蔽管12のみを取り外して洗浄
するだけでよいので、反応生成物11の洗浄が容易かつ
安全に行うことが可能になる。Therefore, the inventor of the present invention first (Japanese Patent Application No. 3-3
No. 07917), as shown in FIG. 4, it is proposed to provide a shielding tube 12 for depositing the reaction product 11 near the inner wall of the reaction tube 1. The shield tube 12 has a cylindrical structure made of quartz glass or the like, and is supported by a support plate 13 fixed to the inner wall of the reaction tube 1 by screwing or the like. As a result, during vapor phase growth, the above-mentioned shield tube 12
It is possible to prevent the reaction product 11 from depositing directly on the inner wall of the reaction tube 1 because the crystal is grown on the shielding tube 12 and the reaction product 11 is deposited because it is heated to a high temperature. Moreover, after the vapor phase growth is performed a predetermined number of times, the reaction tube 1 may be separated from the lower flange 8 and only the shielding tube 12 may be removed for cleaning, so that the reaction product 11 can be easily and safely cleaned. Will be possible.
【0006】しかし、上記したように、反応管1よりも
内側に遮蔽管12を設けると、整流板6により整流され
極めて流れの良い層流となっている成長ガスの流れが、
遮蔽管12の影響を受けるため(図中の矢印)、結晶基
板2上に気相成長する半導体の薄膜をより良質なものと
するためには、更なる工夫が必要とされる。However, as described above, when the shielding tube 12 is provided inside the reaction tube 1, the flow of the growth gas which is rectified by the rectifying plate 6 and has a very good laminar flow,
Because of the influence of the shielding tube 12 (arrow in the figure), further improvement is required to improve the quality of the semiconductor thin film vapor-deposited on the crystal substrate 2 with higher quality.
【0007】[0007]
【発明が解決しようとする課題】以上説明したように、
従来の気相成長装置にあっては、反応炉を構成する反応
管よりも内側に遮蔽管を設ける必要があるため、成長ガ
スの流れが遮蔽管の影響を受け、結晶基板上に気相成長
する半導体の薄膜の品質の向上に限界が生じていた。As described above,
In a conventional vapor phase growth apparatus, it is necessary to provide a shielding tube inside the reaction tube that constitutes the reaction furnace, so the flow of growth gas is affected by the shielding tube, and vapor phase growth on the crystal substrate occurs. There has been a limit to the improvement of the quality of the semiconductor thin film.
【0008】そこで、本発明では、上記問題を解決し、
反応生成物の洗浄が容易かつ安全に実施でき、しかも、
結晶基板上に気相成長する薄膜の品質向上が図れる気相
成長装置を提供することを目的とする。Therefore, the present invention solves the above problems,
The reaction products can be easily and safely washed, and
It is an object of the present invention to provide a vapor phase growth apparatus capable of improving the quality of a thin film vapor phase grown on a crystal substrate.
【0009】[0009]
【課題を解決するための手段】上記目的を達成するため
に、本発明では、反応炉内に配設されたサセプタ上に載
置された基板を加熱手段により加熱し、前記基板に半導
体の薄膜を気相成長させる気相成長装置において、前記
反応炉の内壁に設けられる陥凹部と、この陥凹部に着脱
自在に配設される遮蔽部材とを具備し、前記反応炉の内
壁面と、前記遮蔽部材の内壁面とが略同一面をなすよう
に構成されることを特徴とする気相成長装置を提供す
る。In order to achieve the above object, according to the present invention, a substrate placed on a susceptor arranged in a reaction furnace is heated by a heating means, and a semiconductor thin film is formed on the substrate. In a vapor phase growth apparatus for performing vapor phase growth of a reaction furnace, the apparatus includes: a recess provided in an inner wall of the reaction furnace; and a shield member detachably disposed in the recess, the inner wall surface of the reaction furnace, and Provided is a vapor phase growth apparatus characterized in that the shielding member is configured to be substantially flush with the inner wall surface.
【0010】[0010]
【作用】反応炉の内壁に遮蔽部材を設けることにより、
気相成長時には、上記した遮蔽部材が加熱されて高温に
なるため、遮蔽部材上に結晶成長して反応生成物が堆積
し、反応炉の内壁に直接反応生成物が堆積するのを防止
することができる。[Operation] By providing a shielding member on the inner wall of the reactor,
During vapor phase growth, the above shielding member is heated to a high temperature, so that it is possible to prevent the reaction product from depositing directly on the inner wall of the reactor by crystal growth on the shielding member and deposition of reaction products. You can
【0011】また、反応炉の内壁に陥凹部を設け、この
陥凹部に上記遮蔽部材を配設し、反応炉の内壁面と、前
記遮蔽部材の内壁面とが略同一面をなすような構成とす
ることにより、成長ガスを極めて流れの良い層流の状態
に維持することができる。Further, a recess is provided in the inner wall of the reaction furnace, and the shielding member is disposed in the recess, and the inner wall surface of the reaction furnace and the inner wall surface of the shielding member are substantially flush with each other. By setting the above, the growth gas can be maintained in a laminar flow state in which the flow is extremely good.
【0012】[0012]
【実施例】本発明の実施例について、図面を参照しつつ
詳細に説明する。図1は、本発明に係る気相成長装置の
第1実施例を示したものである。ここで、図3に示した
部分と同一部分については、同一番号を付すこととす
る。Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a first embodiment of a vapor phase growth apparatus according to the present invention. Here, the same parts as those shown in FIG. 3 are designated by the same reference numerals.
【0013】本実施例に係る気相成長装置は、反応管1
と下部フランジ8により構成される反応炉内に結晶基板
2を載置するサセプタ3と、一端にサセプタ3を着脱自
在に支持し、他端が回転駆動装置(図示省略)に接続さ
れる支持棒4と、結晶基板2を加熱するために設けられ
るヒータ5を具備する。また、反応管1内の結晶基板2
の上方にはハニカム等の整流板6が配設され、さらにそ
の上方には、ガス導入口7が設けられている。一方、反
応管1は下部フランジ8上にOリング9を介して着脱自
在に密着されており、この下部フランジ8には、排気口
10が設けられ、この排気口10の一端には排気装置
(図示省略)が接続されている。The vapor phase growth apparatus according to this embodiment comprises a reaction tube 1
A susceptor 3 for mounting the crystal substrate 2 in a reaction furnace constituted by a lower flange 8 and a support rod that detachably supports the susceptor 3 at one end and is connected to a rotation driving device (not shown) at the other end. 4 and a heater 5 provided to heat the crystal substrate 2. In addition, the crystal substrate 2 in the reaction tube 1
A rectifying plate 6 such as a honeycomb is disposed above, and a gas inlet 7 is provided above the rectifying plate 6. On the other hand, the reaction tube 1 is detachably attached to the lower flange 8 via an O-ring 9, and an exhaust port 10 is provided in the lower flange 8, and an exhaust device ( (Not shown) is connected.
【0014】また、反応管1の内壁には、反応生成物1
1を堆積させるための遮蔽管12を配設するための陥凹
部14が設けられている。遮蔽管12は、石英ガラス等
からなる円筒構造を有し、その外壁面12aと前記陥凹
部14の内壁面14aとがほとんど隙間のないように前
記陥凹部14に配設される。ここで、遮蔽管12は、反
応管1の内壁にネジ止め等により固定されている支持板
13により支持されている。一方、遮蔽管12の内壁面
12bは、反応管1の内壁面1aと略同一面をなすよう
に構成されている。On the inner wall of the reaction tube 1, the reaction product 1
A recess 14 is provided for disposing a shield tube 12 for depositing 1. The shield tube 12 has a cylindrical structure made of quartz glass or the like, and is arranged in the recess 14 such that the outer wall surface 12a thereof and the inner wall surface 14a of the recess 14 have almost no gap. Here, the shield tube 12 is supported by a support plate 13 fixed to the inner wall of the reaction tube 1 by screwing or the like. On the other hand, the inner wall surface 12b of the shield tube 12 is configured to be substantially flush with the inner wall surface 1a of the reaction tube 1.
【0015】上記した本実施例に係る気相成長装置にお
いて、結晶基板2をヒータ5の加熱により所定の温度に
上昇させるとともに、回転駆動装置により所定の回転数
で回転させ、ガス導入口7より反応管1内に供給され、
整流板6を介して整流された原料ガス(例えばAs
H3 ,PH3 )及びキャリアガス(例えばH2 )によ
り、結晶基板2上に、半導体の薄膜を気相成長させる。In the vapor phase growth apparatus according to this embodiment described above, the crystal substrate 2 is heated to a predetermined temperature by heating by the heater 5 and is rotated at a predetermined rotation speed by the rotation driving device so that the gas is introduced from the gas inlet 7. Is supplied into the reaction tube 1,
Raw gas rectified via the rectifying plate 6 (for example, As
H 3 and PH 3 ) and a carrier gas (for example, H 2 ) are used to vapor-deposit a semiconductor thin film on the crystal substrate 2.
【0016】以上のような構成によれば、気相成長時に
は、上記した遮蔽管12が加熱されて高温になるため、
遮蔽管12上で結晶成長して反応生成物11が堆積し、
反応管1の内壁に直接反応生成物11が堆積するのを防
止することができる。しかも、気相成長を所定回数行っ
た後、反応管1を下部フランジ8から分離し、遮蔽管1
2のみを取り外して洗浄するだけでよいので、反応生成
物11の洗浄が容易かつ安全に行うことが可能になる。According to the above-mentioned structure, during the vapor phase growth, the shielding tube 12 is heated to a high temperature.
Crystals grow on the shield tube 12 to deposit the reaction product 11,
It is possible to prevent the reaction product 11 from directly depositing on the inner wall of the reaction tube 1. Moreover, after the vapor phase growth is performed a predetermined number of times, the reaction tube 1 is separated from the lower flange 8 and the shield tube 1
Since it suffices to remove only 2 for cleaning, the reaction product 11 can be easily and safely cleaned.
【0017】また、遮蔽管12は、その外壁面12aと
反応管1の陥凹部14の内壁面14aとがほとんど隙間
のないように配設されていることから、この部分に存在
する残留ガスの影響により、結晶基板2上に気相成長す
る半導体の薄膜の組成が変化するようなこともない。Further, since the outer wall surface 12a of the shield tube 12 and the inner wall surface 14a of the recess 14 of the reaction tube 1 are arranged so that there is almost no gap between them, residual gas existing in this portion can be eliminated. The influence does not change the composition of the semiconductor thin film vapor-deposited on the crystal substrate 2.
【0018】さらに、遮蔽管12の内壁面12bと、反
応管1の内壁面1bとが略同一面をなすように構成され
ていることから、整流板6により整流された成長ガスの
流れを極めて流れの良い層流の状態に維持することがで
きるため、結晶基板2上に気相成長する半導体の薄膜を
より良質なものとすることが可能となり、特に、半導体
の薄膜の組成並びに膜厚の均一化に効果がある。Further, since the inner wall surface 12b of the shield tube 12 and the inner wall surface 1b of the reaction tube 1 are configured to be substantially flush with each other, the flow of the growth gas rectified by the rectifying plate 6 is extremely high. Since it is possible to maintain a good laminar flow state, it is possible to improve the quality of the semiconductor thin film vapor-deposited on the crystal substrate 2, and particularly to improve the composition and thickness of the semiconductor thin film. Effective for homogenization.
【0019】図2は、本発明に係る気相成長装置の第2
実施例を示したものである。ここで、図1に示した部分
と同一部分または同一機能を有する部分については、同
一番号を付すことにより、重複説明を省略する。FIG. 2 shows a second vapor phase growth apparatus according to the present invention.
It shows an example. Here, the same parts as those shown in FIG. 1 or parts having the same functions are designated by the same reference numerals, and a duplicate description will be omitted.
【0020】本実施例においては、遮蔽管12の外壁面
12aおよび反応管1の内壁に設けられた陥凹部14の
内壁面14aとにネジ部を設け、遮蔽管12を反応管1
の陥凹部14に螺合する構成としている。これにより、
両者の隙間をほぼ零とすることができるとともに、遮蔽
管12を支持するための支持板13を設ける必要がな
い。このため、反応間1と遮蔽管12との隙間に存在す
る残留ガスを最小限にすることができ、半導体の薄膜を
良質なものとすることができる。また、このような構成
によっても、第1実施例と同様の効果を得ることができ
る。In this embodiment, a screw is provided on the outer wall surface 12a of the shield tube 12 and the inner wall surface 14a of the recessed portion 14 provided on the inner wall of the reaction tube 1, and the shield tube 12 is attached to the reaction tube 1.
It is configured to be screwed into the recess 14 of the. This allows
The gap between the two can be made substantially zero, and it is not necessary to provide the support plate 13 for supporting the shield tube 12. Therefore, the residual gas existing in the gap between the reaction chamber 1 and the shield tube 12 can be minimized, and the semiconductor thin film can be of good quality. Also, with such a configuration, the same effect as that of the first embodiment can be obtained.
【0021】[0021]
【発明の効果】以上説明したように、本発明によれば、
反応管1の内壁に直接反応生成物11が堆積するのを防
止することができ、しかも、気相成長を所定回数行った
後、反応管1を下部フランジ8から分離し、遮蔽管12
のみを取り外して洗浄するだけでよいので、反応生成物
11の洗浄が容易かつ安全に行うことが可能になる。As described above, according to the present invention,
It is possible to prevent the reaction product 11 from directly depositing on the inner wall of the reaction tube 1, and further, after the vapor phase growth is performed a predetermined number of times, the reaction tube 1 is separated from the lower flange 8 and the shield tube 12 is formed.
Since it is only necessary to remove and wash the reaction product 11, the reaction product 11 can be easily and safely washed.
【0022】また、整流板6により整流された成長ガス
の流れを極めて流れの良い層流の状態に維持することが
できるため、結晶基板2上に気相成長する化合物半導体
の薄膜をより良質なものとすることが可能となり、特
に、半導体の薄膜の組成並びに膜厚の均一化に効果があ
る。Further, since the flow of the growth gas rectified by the rectifying plate 6 can be maintained in a laminar flow state in which the flow is very good, the thin film of the compound semiconductor which is vapor-phase grown on the crystal substrate 2 can be improved. In particular, it is effective in uniformizing the composition and film thickness of the semiconductor thin film.
【図1】本発明の第1実施例に係る気相成長装置。FIG. 1 is a vapor phase growth apparatus according to a first embodiment of the present invention.
【図2】本発明の第2実施例に係る気相成長装置。FIG. 2 is a vapor phase growth apparatus according to a second embodiment of the present invention.
【図3】従来の気相成長装置。FIG. 3 is a conventional vapor phase growth apparatus.
【図4】遮蔽管を設けた気相成長装置。FIG. 4 is a vapor phase growth apparatus provided with a shield tube.
1 反応管 2 結晶基板 3 サセプタ 4 支持棒 5 ヒータ 6 整流板 7 ガス導入口 8 下部フランジ 9 Oリング 10 排気口 11 反応生成物 12 遮蔽管 13 支持板 14 陥凹部 1 Reaction Tube 2 Crystal Substrate 3 Susceptor 4 Support Rod 5 Heater 6 Rectifier Plate 7 Gas Inlet Port 8 Lower Flange 9 O-Ring 10 Exhaust Port 11 Reaction Product 12 Shielding Tube 13 Support Plate 14 Cavity
Claims (1)
された基板を加熱手段により加熱し、前記基板に半導体
の薄膜を気相成長させる気相成長装置において、前記反
応炉の内壁に設けられる陥凹部と、この陥凹部に着脱自
在に配設される遮蔽部材とを具備し、前記反応炉の内壁
面と、前記遮蔽部材の内壁面とが略同一面をなすように
構成されることを特徴とする気相成長装置。1. An inner wall of the reaction furnace in a vapor phase growth apparatus for heating a substrate placed on a susceptor arranged in the reaction furnace by a heating means to vapor-deposit a semiconductor thin film on the substrate. And a shield member detachably arranged in the recess, and the inner wall surface of the reactor and the inner wall surface of the shield member are substantially flush with each other. A vapor phase growth apparatus characterized in that
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP00802493A JP3214750B2 (en) | 1993-01-21 | 1993-01-21 | Vapor phase growth equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP00802493A JP3214750B2 (en) | 1993-01-21 | 1993-01-21 | Vapor phase growth equipment |
Publications (2)
Publication Number | Publication Date |
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JPH06216045A true JPH06216045A (en) | 1994-08-05 |
JP3214750B2 JP3214750B2 (en) | 2001-10-02 |
Family
ID=11681772
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP00802493A Expired - Fee Related JP3214750B2 (en) | 1993-01-21 | 1993-01-21 | Vapor phase growth equipment |
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JP (1) | JP3214750B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6059885A (en) * | 1996-12-19 | 2000-05-09 | Toshiba Ceramics Co., Ltd. | Vapor deposition apparatus and method for forming thin film |
JP2009027021A (en) * | 2007-07-20 | 2009-02-05 | Nuflare Technology Inc | Vapor-phase growing device and vapor-phase growing method |
JP2014520201A (en) * | 2011-03-23 | 2014-08-21 | ピルキントン グループ リミテッド | Apparatus for coating thin film coating and coating method using such apparatus |
-
1993
- 1993-01-21 JP JP00802493A patent/JP3214750B2/en not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6059885A (en) * | 1996-12-19 | 2000-05-09 | Toshiba Ceramics Co., Ltd. | Vapor deposition apparatus and method for forming thin film |
JP2009027021A (en) * | 2007-07-20 | 2009-02-05 | Nuflare Technology Inc | Vapor-phase growing device and vapor-phase growing method |
JP2014520201A (en) * | 2011-03-23 | 2014-08-21 | ピルキントン グループ リミテッド | Apparatus for coating thin film coating and coating method using such apparatus |
JP2017040004A (en) * | 2011-03-23 | 2017-02-23 | ピルキントン グループ リミテッド | Device for covering thin film coating, and coating method using such device |
Also Published As
Publication number | Publication date |
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JP3214750B2 (en) | 2001-10-02 |
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