JPH0568865A - Gas supply system - Google Patents

Gas supply system

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Publication number
JPH0568865A
JPH0568865A JP25857791A JP25857791A JPH0568865A JP H0568865 A JPH0568865 A JP H0568865A JP 25857791 A JP25857791 A JP 25857791A JP 25857791 A JP25857791 A JP 25857791A JP H0568865 A JPH0568865 A JP H0568865A
Authority
JP
Japan
Prior art keywords
gas
valve
stainless steel
gas supply
weight
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
Application number
JP25857791A
Other languages
Japanese (ja)
Inventor
Takenobu Matsuo
剛伸 松尾
Takeshi Wakabayashi
剛 若林
Shuji Moriya
修司 守谷
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.)
Tokyo Electron Ltd
Original Assignee
Tokyo Electron Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tokyo Electron Ltd filed Critical Tokyo Electron Ltd
Priority to JP25857791A priority Critical patent/JPH0568865A/en
Priority to US07/942,501 priority patent/US5307568A/en
Publication of JPH0568865A publication Critical patent/JPH0568865A/en
Pending legal-status Critical Current

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  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

PURPOSE:To extremely inhibit contaminant from being mixed with a body to be treated in the case of treating the wafer for a semiconductor by using austenitic stainless steel containing >=6wt.% molybdenum for all parts or one part of a gas passage part for passing corrosive gas. CONSTITUTION:Austenitic stainless steel containing 6.0-6.5wt.% Mo, 17.5-18.5wt.% Ni, 19.5-20.5wt.% Cr and furthermore Cu and N is used as a gas pipeline 2. One end side of the gas pipeline 2 is connected to a cylinder 1 filled with gaseous chlorine of corrosive gas. Successively a ball valve BV1, a reducing valve RV, a valve V1, a check valve CV1, a valve V2, a mass flow controller MFC, a check valve CV2, a band valve HV and a gas filter F or the like are interposed. An injector 31 is connected to the other end side via a 'Teflon(R)' tube 3. Gaseous chlorine is supplied into the reaction pipe 5 of a heat-treating device 4.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、ガス供給システムに関
する。
FIELD OF THE INVENTION The present invention relates to a gas supply system.

【0002】[0002]

【従来の技術】半導体デバイスが高集積化、高性能化す
るにつれて、マイクロコンタミネーションが製品の歩留
まりや品質、信頼性に増々大きな影響を与えるようにな
ってきている。マイクロコンタミネーションによるデバ
イスの不良原因としては、粒子状レベルの汚染物質(パ
ーティクル)によるパターン欠陥や、原子、分子レベル
の汚染物質例えば重金属による電気的特性劣化などがあ
る。
2. Description of the Related Art As semiconductor devices have become highly integrated and have high performance, microcontamination has a great influence on the yield, quality and reliability of products. Causes of device defects due to microcontamination include pattern defects due to particle-level contaminants (particles) and deterioration of electrical characteristics due to atomic- and molecular-level contaminants such as heavy metals.

【0003】こうしたことから半導体ウエハの製造工程
においては、搬送系、処理系、洗浄系などの各方面から
トータルクリーン化を図らなければならず、このため処
理装置のガス供給システムにおいても、処理の種類によ
っては塩素ガスやシラン系のガスなど腐食性の強いガス
が使用されるため、ガス配管材料として耐食性の大きい
例えばSUS316Lを用い、また溶接部が腐食しやす
いことから溶接方法についても特殊な方法を採用するな
ど、クリーン化を図るために種々の工夫がなされてい
る。
For this reason, in the manufacturing process of semiconductor wafers, it is necessary to achieve total cleanliness from various aspects such as the transfer system, the processing system, and the cleaning system. Therefore, even in the gas supply system of the processing apparatus, the processing can be performed. Corrosive gas such as chlorine gas or silane-based gas is used depending on the type, so SUS316L, which has a high corrosion resistance, is used as the gas pipe material, and the welding method is also a special method because the welded portion is easily corroded. Various measures have been taken to achieve cleanliness, such as adoption of.

【0004】[0004]

【発明が解決しようとする課題】ところで、ガス配管に
おける腐食を完全に抑えることはできず、特に溶接部か
らの粒子レベルの汚染物質や重金属イオンの発生を10
0%防止することはできないため、こうした汚染物質が
ミクロレベルで見ればウエハの処理装置例えば熱処理装
置内に導入されている。
By the way, it is not possible to completely suppress the corrosion in the gas pipe, and in particular, the generation of particle-level pollutants and heavy metal ions from the welded portion can be suppressed.
Since 0% cannot be prevented, such contaminants are introduced into a wafer processing apparatus such as a heat treatment apparatus at a micro level.

【0005】一方例えばDRAMを例にとると、メモリ
容量が16M、32M更には64Mへと移行しつつあ
り、ガス供給システムから発生するパーティクルや重金
属イオンの量が従来の例えば4M程度の集積度のDRA
Mに対しては問題にならなかったとしても、このような
高集積度になると、デバイスに悪影響を及ぼすおそれが
ある。即ちガス供給システムの従来のガス配管材料例え
ばSUS316Lは、上述のようなデバイスの高集積度
を想定して選定されたものではないため、ここから発生
する汚染物質、特に溶接部における腐食性の低下により
発生した汚染物質の量は今後のデバイスに対しては許容
範囲を越えるおそれが強い。
On the other hand, taking a DRAM as an example, the memory capacity is shifting to 16M, 32M and even 64M, and the amount of particles and heavy metal ions generated from the gas supply system is about 4M, which is the conventional level. DRA
Even if it is not a problem for M, such a high degree of integration may adversely affect the device. That is, the conventional gas piping material of the gas supply system, for example, SUS316L, was not selected in view of the high degree of integration of the device as described above. It is highly possible that the amount of pollutants generated by will exceed the allowable range for future devices.

【0006】しかしながら半導体ウエハの処理装置のガ
ス配管として従来広く使用されているSUS316Lに
代わる適切な材料の選定についてまで検討されていない
のが実情であり、ガス配管材料も含めて、いわゆる次世
代のデバイスに対応したガス供給システムの確立が望ま
れている。
However, the fact is that the selection of an appropriate material in place of SUS316L, which has been widely used in the past as a gas pipe for a semiconductor wafer processing apparatus, has not been studied yet. The establishment of a gas supply system compatible with devices is desired.

【0007】本発明は、このような事情のもとになされ
たものであり、その目的は,半導体ウエハなどの処理を
行うにあたって、被処理体に対する汚染物質の混入を極
力抑えることのできるガス供給システムを提供すること
にある。
The present invention has been made under such circumstances, and an object thereof is to supply a gas capable of suppressing contamination of contaminants into an object to be processed when processing a semiconductor wafer or the like. To provide a system.

【0008】[0008]

【課題を解決するための手段】本発明は、ガス供給源か
ら通気路部を介して処理ガスを処理部に供給するガス供
給システムにおいて、腐食性ガスが通流する通気路部の
全部または一部を、6重量%以上のモリブデンを含むオ
ーステナイトステンレス鋼により構成したことを特徴と
する。
DISCLOSURE OF THE INVENTION The present invention is a gas supply system for supplying a processing gas from a gas supply source to a processing section via a ventilation path section, and all or one of the ventilation path section through which corrosive gas flows. The part is made of austenitic stainless steel containing 6% by weight or more of molybdenum.

【0009】オ−ステナイトステンレス鋼としては、例
えばMoを6.0〜6.5重量%、Niを17.5〜1
8.5重量%、Crを19.5〜20.5重量%含有
し、更に少なくともCu及びNを含有するものを用いる
ことができる。
As the austenitic stainless steel, for example, Mo is 6.0 to 6.5% by weight and Ni is 17.5 to 1.
A material containing 8.5% by weight, 19.5 to 20.5% by weight of Cr, and further containing at least Cu and N can be used.

【0010】[0010]

【作用】ガス供給源から処理ガスがガス配管及びバルブ
やマスフロメータなどの制御機器を介して熱処理装置内
に導入される。処理ガスが腐食性ガスである場合、これ
に接触する通気路部の内表面特に溶接部は、ミクロレベ
ルで見れば腐食されるが、例えばガス配管の全部を6重
量%以上のモリブテンを含むオーステナイトステンレス
鋼により構成することによりその腐食の進行は極めて遅
くなる。従って通気路部におけるパーティクルや重金属
イオンの発生は極力抑えられ、汚染物質の許容範囲が相
当狭い被処理体に対しても悪影響を避けることができ
る。
The processing gas is introduced from the gas supply source into the heat treatment apparatus through the gas pipe and the control device such as the valve and the mass flow meter. When the process gas is a corrosive gas, the inner surface of the air passage part in contact with the gas, particularly the welded part, is corroded at a micro level, but for example, the entire gas pipe contains austenite containing 6 wt% or more of molybdenum. By using stainless steel, the progress of corrosion is extremely slow. Therefore, the generation of particles and heavy metal ions in the ventilation path can be suppressed as much as possible, and the adverse effect can be avoided even on the object to be processed having a considerably narrow range of contaminants.

【0011】[0011]

【実施例】図1は本発明の実施例を示す図であり、腐食
性ガス例えば塩素ガスを充填したボンベよりなるガス供
給源1にガス配管2の一端側が接続されており、このガ
ス配管2には、例えばボールバルブBV1、減圧弁R
V、バルブV1、逆止弁CV1、バルブV2、マスフロ
コントローラMFC、逆止弁CV2、ハンドバルブH
V、及びガスフィルタFなどの制御機器がこの順に上流
側から介装されている。前記ガス配管2の他端側はテフ
ロンチューブ3を介してインジェクタ31に接続されて
おり、ガス配管2中を通ってきた塩素ガスを熱処理部を
形成する熱処理装置4の反応管5内に供給するようにな
っている。
FIG. 1 is a view showing an embodiment of the present invention, in which one end side of a gas pipe 2 is connected to a gas supply source 1 consisting of a cylinder filled with a corrosive gas such as chlorine gas. Includes, for example, a ball valve BV1 and a pressure reducing valve R
V, valve V1, check valve CV1, valve V2, mass flow controller MFC, check valve CV2, hand valve H
Control devices such as the V and the gas filter F are provided in this order from the upstream side. The other end of the gas pipe 2 is connected to an injector 31 via a Teflon tube 3, and the chlorine gas that has passed through the gas pipe 2 is supplied into a reaction tube 5 of a heat treatment device 4 that forms a heat treatment section. It is like this.

【0012】そして前記ガス配管2としては、Mo(モ
リブテン)を6.0重量%以上含有するオーステナイト
ステンレス鋼、例えばCを0.020重量%以下、Si
を0.80重量%以下、Mnを1.00重量%以下、P
を0.25重量%以下、Sを0.01重量%以下、Cu
を0.5〜1.0重量%、Niを17.5〜18.5重
量%、Crを19.5〜20.5重量%、Moを6.0
〜6.5重量%、Nを0.18〜0.22重量%含有す
る完全オーステナイトステンレス鋼(以下ステンレス鋼
Aという。)により構成する。
As the gas pipe 2, an austenitic stainless steel containing Mo (molybdenum) in an amount of 6.0 wt% or more, for example, C in an amount of 0.020 wt% or less, Si
Is 0.80% by weight or less, Mn is 1.00% by weight or less, P
0.25 wt% or less, S 0.01 wt% or less, Cu
Is 0.5 to 1.0% by weight, Ni is 17.5 to 18.5% by weight, Cr is 19.5 to 20.5% by weight, and Mo is 6.0.
.About.6.5% by weight and 0.18 to 0.22% by weight of N, and is composed of completely austenitic stainless steel (hereinafter referred to as stainless steel A).

【0013】前記ステンレス鋼Aの含有成分のうち、熱
処理装置のガス供給システムに最も要求される耐食性に
大きく関連する成分に関して述べると、Crは耐食性、
特に耐孔食性に優れているので溶接部の耐食性を確保す
るのに重要な成分であり、またNiは耐食性を得、かつ
Crとの混合比を調節して完全オーステナイト相を得る
ために必要な成分である。そしてMoについては、孔
食、スキ間腐食防止に有効に作用し、溶接部の耐孔食性
を向上させるために6重量%以上含有することが必要で
ある。更にNは耐孔食性を得、かつオーステナイト相安
定化のために含有されており、CuはMoを含有したオ
ーステナイトステンレス鋼において耐酸性を向上するた
めに添加されている。
Of the components contained in the stainless steel A, the components most closely related to the corrosion resistance most required for the gas supply system of the heat treatment apparatus will be described. Cr is the corrosion resistance,
In particular, since it has excellent pitting corrosion resistance, it is an important component for ensuring the corrosion resistance of the welded portion, and Ni is necessary for obtaining the corrosion resistance and adjusting the mixing ratio with Cr to obtain the complete austenite phase. It is an ingredient. Mo is required to be contained in an amount of 6% by weight or more in order to effectively prevent pitting corrosion and inter-gap corrosion and to improve pitting corrosion resistance of the welded portion. Further, N is contained for obtaining pitting corrosion resistance and stabilizing the austenite phase, and Cu is added for improving acid resistance in the austenitic stainless steel containing Mo.

【0014】次に上述実施例の作用について述べると、
熱処理装置4の反応管5内にウエハボート6により多数
のウエハWをロードした後、反応管5内を所定の真空度
に減圧すると共に、ヒータ7により所定温度の均熱状態
とし、次いでガス供給源1よりの例えば塩素ガスを配管
1内を通流させると共に、減圧弁RG及びマスフロコン
トローラMFCにより夫々圧力及び流量を制御して、イ
ンジェクタ31を介して反応管5内に導入し、反応管5
内を所定の圧力に維持してウエハWに対して熱処理であ
る例えばエッチング処理を行う。
Next, the operation of the above embodiment will be described.
After loading a large number of wafers W into the reaction tube 5 of the heat treatment apparatus 4 by the wafer boat 6, the inside of the reaction tube 5 is depressurized to a predetermined degree of vacuum, and the heater 7 is brought to a soak state of a predetermined temperature, and then gas is supplied. For example, chlorine gas from the source 1 is caused to flow through the pipe 1, and the pressure and the flow rate are controlled by the pressure reducing valve RG and the mass flow controller MFC, respectively, and introduced into the reaction pipe 5 through the injector 31. 5
The inside of the wafer W is maintained at a predetermined pressure, and the wafer W is subjected to heat treatment, for example, etching treatment.

【0015】ここでガス配管2においては、非溶接継手
の場合シール部材の劣化や構造が複雑であるなどの問題
があることから溶接部の個所が多くあり、これら溶接部
に例えば塩素ガスが接触しているが、ガス配管2は、上
述のように溶接部の耐孔食性に有効なMoを6.00〜
6.50重量%含有した完全オーステナイトステンレス
鋼により構成されているため、母体については勿論のこ
と、溶接部においても腐食は事実上起こらず、従って粒
子レベルや原子、分子レベルの汚染物質の発生は極力抑
えられるので、ガス供給システムから取り込まれる汚染
物質がウエハWの信頼性に影響を及ぼすおそれはない。
In the case of the non-welded joint, the gas pipe 2 has many welded portions due to problems such as deterioration of the sealing member and complicated structure. For example, chlorine gas comes into contact with these welded portions. However, the gas pipe 2 contains 6.00 Mo which is effective for the pitting corrosion resistance of the welded portion as described above.
Since it is composed of completely austenitic stainless steel containing 6.50% by weight, virtually no corrosion occurs not only in the base material but also in the welded portion, so that the generation of contaminants at the particle level, atomic level and molecular level is prevented. Since it is suppressed as much as possible, there is no possibility that the contaminants taken in from the gas supply system affect the reliability of the wafer W.

【0016】ここで半導体ウエハの熱処理のために用い
られる処理ガスの中でも腐食性の極めて大きいガスの一
つである塩素ガスを用いて、上述実施例でガス配管2に
使用したステンレス鋼Aの溶接部の耐食性を次のように
して調べた。即ち溶接部を有するステンレス鋼Aよりな
る内径1/4インチのパイプ中に水分を100ppm含
む塩素ガスを封じ込めて3日間放置し、その後パイプを
解放して溶接部の表面観察を行った。その結果溶接部に
おける腐食はまったく観察されなかった。
Welding of the stainless steel A used for the gas pipe 2 in the above-mentioned embodiment using chlorine gas, which is one of the processing gases used for the heat treatment of semiconductor wafers, is one of the most corrosive gases. The corrosion resistance of the parts was examined as follows. That is, chlorine gas containing 100 ppm of water was enclosed in a pipe made of stainless steel A having a welded portion and having an inner diameter of 1/4 inch, and the pipe was left for 3 days, and then the pipe was released to observe the surface of the welded portion. As a result, no corrosion was observed in the weld.

【0017】また表1に示す比較鋼1〜比較鋼4を用い
て同様の試験を行ったところ、いずれもわずかに腐食が
認められた。
Further, when the same test was performed using Comparative Steels 1 to 4 shown in Table 1, slight corrosion was observed in all of them.

【0018】[0018]

【表1】 なお表1中ステンレス鋼Aについての含有成分を本発明
の鋼として表示してある。
[Table 1] In Table 1, the components contained in stainless steel A are shown as the steel of the present invention.

【0019】以上の実験結果からステンレス鋼Aは、溶
接部においても大きな耐食性があり、例えば半導体ウエ
ハの熱処理装置に用いられるガス供給システムの配管材
料として好適であることが理解される。この理由は、ス
テンレス鋼Aが耐食性の大きなオーステナイトステンレ
ス鋼をベースとして、孔食、スキ間腐食に最も有効なM
oを比較鋼1〜4に比べて多く含有していることに基づ
くものと推察される。そして本発明ではガス配管に用い
るオーステナイトステンレス鋼中のMoの含有量は、上
述の実施例に限定されないが、配管中の溶接部において
ウエハの信頼性を確保するに十分な耐食性を得るために
は、6重量%以上であることが必要である。
From the above experimental results, it is understood that stainless steel A has a high corrosion resistance even in the welded portion and is suitable as a piping material for a gas supply system used in a heat treatment apparatus for semiconductor wafers, for example. The reason for this is that stainless steel A is based on austenitic stainless steel, which has high corrosion resistance, and is the most effective M for pitting and inter-gap corrosion.
It is presumed that it is based on the fact that O is contained in a larger amount than in Comparative Steels 1 to 4. And in the present invention, the content of Mo in the austenitic stainless steel used for the gas pipe is not limited to the above-mentioned examples, but in order to obtain sufficient corrosion resistance to secure the reliability of the wafer in the welded portion in the pipe. , 6% by weight or more.

【0020】以上において本発明では、6重量%以上の
Moを含むオーステナイトステンレス鋼をガス配管の全
部に使用してもよいし、その一部例えば溶接部を有する
配管部のみに使用してもよく、更にはバルブなどの制御
機器における通気路部に用いてもよい。
In the above, in the present invention, the austenitic stainless steel containing 6% by weight or more of Mo may be used for all of the gas pipes, or a part thereof, for example, only for the pipe portion having the welded portion. Further, it may be used for a ventilation path portion in a control device such as a valve.

【0021】また本発明で用いるオーステナイトステン
レス鋼は、全部がオーステナイト相でなくとも、一部が
オーステナイト相であるもの、例えばフェライトオース
テナイト二相ステンレス鋼なども含むものである。
The austenitic stainless steel used in the present invention includes austenitic stainless steel having a part of austenitic phase, for example, ferritic austenitic duplex stainless steel, if not all.

【0022】また、本発明は熱処理装置に限らず、エッ
チング装置、イオン注入装置、プラズマCVD装置など
に適用してもよい。
The present invention is not limited to the heat treatment apparatus, but may be applied to an etching apparatus, an ion implantation apparatus, a plasma CVD apparatus and the like.

【0023】[0023]

【発明の効果】本発明によれば、腐食性ガスが通流する
通気路部の一部または全部をMoを6重量%以上含有す
るオーステナイトステンレス鋼により構成したので通気
路部の耐食性特に溶接部の耐食性が大きく、この結果粒
子レベル、あるいは分子、原子レベルの汚染物質の発生
を極力抑えることができる。従って熱処理装置内の被処
理体に対する汚染物質による信頼性の低下を防止し、例
えば今後一層高集積化が図られる半導体デバイスの製造
に有効であり、歩留まりの向上に寄与するものである。
According to the present invention, since a part or all of the air passage portion through which corrosive gas flows is made of austenitic stainless steel containing 6% by weight or more of Mo, the corrosion resistance of the air passage portion, especially the welded portion. Corrosion resistance is high, and as a result, generation of pollutants at the particle level, molecular level, or atomic level can be suppressed as much as possible. Therefore, it is possible to prevent the reliability of the object to be processed in the heat treatment apparatus from being deteriorated due to contaminants, and it is effective, for example, in the manufacture of a semiconductor device in which higher integration will be achieved in the future, and contributes to the improvement of the yield.

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

【図1】本発明の実施例を示す説明図である。FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1 ガス供給源 2 ガス配管 3 テフロンチューブ 31 インジェクタ 4 熱処理装置 5 反応管 1 Gas Supply Source 2 Gas Pipe 3 Teflon Tube 31 Injector 4 Heat Treatment Device 5 Reaction Tube

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 ガス供給源から通気路部を介して処理ガ
スを処理部に供給するガス供給システムにおいて、 腐食性ガスが通流する通気路部の全部または一部を、6
重量%以上のモリブデンを含むオーステナイトステンレ
ス鋼により構成したことを特徴とするガス供給システ
ム。
1. A gas supply system for supplying a processing gas from a gas supply source to a processing section via a ventilation path section, wherein all or part of the ventilation path section through which the corrosive gas flows is
A gas supply system comprising an austenitic stainless steel containing molybdenum by weight or more.
【請求項2】 オ−ステナイトステンレス鋼はMoを
6.0〜6.5重量%、Niを17.5〜18.5重量
%、Crを19.5〜20.5重量%含有し、更に少な
くともCu及びNを含有するものであることを特徴とす
る請求項1記載のガス供給システム。
2. Austenitic stainless steel contains 6.0 to 6.5% by weight of Mo, 17.5 to 18.5% by weight of Ni and 19.5 to 20.5% by weight of Cr, and The gas supply system according to claim 1, wherein the gas supply system contains at least Cu and N.
JP25857791A 1991-09-09 1991-09-09 Gas supply system Pending JPH0568865A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP25857791A JPH0568865A (en) 1991-09-09 1991-09-09 Gas supply system
US07/942,501 US5307568A (en) 1991-09-09 1992-09-09 Gas supply system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25857791A JPH0568865A (en) 1991-09-09 1991-09-09 Gas supply system

Publications (1)

Publication Number Publication Date
JPH0568865A true JPH0568865A (en) 1993-03-23

Family

ID=17322185

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25857791A Pending JPH0568865A (en) 1991-09-09 1991-09-09 Gas supply system

Country Status (1)

Country Link
JP (1) JPH0568865A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6984267B2 (en) * 1998-06-30 2006-01-10 Fujitsu Limited Manufacture system for semiconductor device with thin gate insulating film
US20100212593A1 (en) * 2009-02-23 2010-08-26 Hitachi Kokusai Electric Inc. Substrate processing apparatus
US7862638B2 (en) 2007-04-10 2011-01-04 Tokyo Electron Limited Gas supply system for semiconductor manufacturing apparatus
JP2021153119A (en) * 2020-03-24 2021-09-30 信越半導体株式会社 Piping connection method and semiconductor wafer heat treatment device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6984267B2 (en) * 1998-06-30 2006-01-10 Fujitsu Limited Manufacture system for semiconductor device with thin gate insulating film
US7862638B2 (en) 2007-04-10 2011-01-04 Tokyo Electron Limited Gas supply system for semiconductor manufacturing apparatus
US20100212593A1 (en) * 2009-02-23 2010-08-26 Hitachi Kokusai Electric Inc. Substrate processing apparatus
US8343277B2 (en) * 2009-02-23 2013-01-01 Hitachi Kokusai Electric Inc. Substrate processing apparatus
JP2021153119A (en) * 2020-03-24 2021-09-30 信越半導体株式会社 Piping connection method and semiconductor wafer heat treatment device

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