WO1995034376A1 - Procede de traitement de surfaces par jets de gaz et dispositif associe - Google Patents
Procede de traitement de surfaces par jets de gaz et dispositif associe Download PDFInfo
- Publication number
- WO1995034376A1 WO1995034376A1 PCT/JP1995/000911 JP9500911W WO9534376A1 WO 1995034376 A1 WO1995034376 A1 WO 1995034376A1 JP 9500911 W JP9500911 W JP 9500911W WO 9534376 A1 WO9534376 A1 WO 9534376A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas
- plasma
- surface treatment
- nozzle
- heated
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/26—Deposition of carbon only
- C23C16/27—Diamond only
- C23C16/276—Diamond only using plasma jets
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/50—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating using electric discharges
- C23C16/513—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating using electric discharges using plasma jets
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/54—Plasma accelerators
Definitions
- the present invention relates to a surface treatment method and apparatus by gas injection for performing surface treatment on a processing target by injecting a gas onto the surface of the processing target, and particularly to a method for forming a diamond thin film on a tool chip and various substrates.
- the present invention relates to a surface treatment method and apparatus suitable for applying a semiconductor thin film on a substrate.
- the gas is turned into plasma by the induction plasma method or the DC plasma jet method, and the gas is activated to maintain a state of increasing reactivity with the surface to be processed.
- the technique of performing surface treatment by spraying is already known, and is used for diamond film formation (diamond coating) and the like.
- JP-A-2-26695, JP-A-2-64097, JP-A-2-39421, JP-A-2-296976 For example, this type of technology is disclosed.
- the temperature of the gasified plasma is so high that when the gas is injected onto the object, the temperature must be reduced to a temperature that the object can withstand. If the injection is performed at a high temperature, the thin film processing on the surface to be processed may be defective. It is also required that no impurities be mixed into the highly reactive gas in the form of plasma. This is because if impurities are mixed, the quality of the film is deteriorated.
- the gas is turned into plasma, and then the gas is further introduced downstream of the gas, so that the adiabatic expansion process does not occur. That is, although the cooling is performed by the introduced gas, the flow velocity does not sufficiently increase, so that the above requirement of terminating the injection in a short time is not satisfied.
- the present invention has been made in view of such circumstances, and aims to satisfy all of the requirements when performing a thin film deposition process, etc., thereby improving work efficiency and improving surface treatment quality. It is intended for.
- the object of the present invention is achieved by the following configurations.
- the surface treatment method by gas injection for performing the surface treatment on the object to be treated by injecting a gas onto the surface of the object to be treated, Heating and plasma-converting the gas; adiabatically expanding the heated and plasma-converted gas to a flow velocity greater than the sonic velocity;
- the supersonic nozzle is provided so that the gas passing through the nozzle is adiabatically expanded and injected from the nozzle outlet at a flow velocity larger than the sonic velocity.
- a heating means for heating a gas passing through the inside of the nozzle of the supersonic nozzle and turning it into plasma is provided,
- a gas to be injected onto the surface of the processing target is supplied into the nozzle from a gas supply position on the upstream side of a gas flow path from an inlet of the supersonic nozzle or a position where the heating means is provided, and The heated gas is heated and turned into plasma by the heating means, and the heated and turned gas is jetted from the nozzle outlet toward the surface of the object to be processed.
- the heating means is configured to heat and convert the gas into plasma without using an electrode that directly contacts the plasma gas.
- the gas 6 to be jetted onto the surface of the processing target 15 is heated and turned into plasma by the heating means 5, and the highly reactive state (excitation state) State, active state).
- the heated and plasmaized gas is adiabatically expanded by the supersonic nozzle 1 to have a flow velocity larger than the sonic velocity.
- the gas 7 having a flow velocity higher than the sound velocity is injected toward the surface of the processing target 15. In this way, the gas 7 which has been heated and turned into plasma and has become a highly reactive state reaches the object to be treated 15 to be ejected at a supersonic speed in a short time.
- the gas 7 reacts with the surface of the object 15 while maintaining the highly reactive state (excited state, active state), and the adhesion between the object 15 and the reaction product is maintained. And the inconvenience such as separation of reaction products does not occur.
- the injection is completed in a short time, the film forming speed is increased, and the working efficiency is improved.
- the temperature of the heated and plasma-converted gas 7 is reduced to a temperature that the object 15 can withstand by adiabatic expansion, and the quality of the thin film processing on the surface of the object 15 is improved. You.
- the gas is heated and turned into plasma without using an electrode that directly contacts the plasma gas, so that impurities accompanying the consumption of the electrode are contained in the highly reactive plasma gas. (Electrode material) is not mixed, and the quality of surface treatment such as film formation is improved.
- FIG. 1 is a view showing a configuration of an embodiment of a surface treatment method and apparatus by gas injection according to the present invention.
- FIG. 2 is a diagram showing a configuration of another embodiment. BEST MODE FOR CARRYING OUT THE INVENTION
- Fig. 1 is a view showing the configuration of the apparatus of the embodiment.As shown in the figure, the gas passing through the nozzle is adiabatically expanded and injected from the nozzle outlet 4a at a flow velocity u greater than the sonic velocity a as described later. Under these conditions, a supersonic nozzle, Laparle nozzle (also called Suehiro nozzle) 1 is configured.
- the rubber nozzle 1 is a medium-sized nozzle, and a gas 6 (for example, a mixed gas of CH4 and H2) to be injected onto the surface of the object to be processed (for example, a cutting tool chip) 15 is introduced from the gas inlet 2a.
- the gas introduction pipe 2 is configured so that the cross-sectional area gradually decreases as the gas progresses, and the throat (throat) 3 has the smallest cross-sectional area A1 (diameter dl) over the entire nozzle.
- the Lapearl nozzle 1 is arranged so that the gas 7 injected from the injection port 4a is injected toward the surface of the object 15 to be processed.
- the throat section 3 is provided with an induction plasma device.
- an induction coil 5 is wound around the outer periphery of the throat portion 3, and the induction coil 5 A high-frequency current can be supplied to 5.
- the induction plasma device is an electrodeless plasma device using an induced electromagnetic field, and a plasma gas and an electrode come into direct contact like a DC plasma device, and as a result, the electrode is consumed with the depletion of the electrode. Material (tungsten, etc.) is not mixed into the plasma gas, and contamination of impurities can be prevented.
- a high-density mixed gas 6 to be injected into the processing target 15 is supplied into the Lapearl nozzle 1 from the gas inlet port 2a. Since a high-frequency current is applied to the high-frequency induction coil 5, an induced electromagnetic field is generated in the tube, and the energy of this field heats the high-density gas into a plasma, and then heats and converts the gas into a plasma. The generated high-density gas is expanded and accelerated due to the expansion of the nozzle by the gas ejection pipe 4 on the downstream side, and is injected as a supersonic plasma jet 7 from the gas injection port 4a.
- the ratio P1ZP0 between the stagnation pressure P0 of the introduced gas 6 and the pressure P1 downstream of the injection port 4a is about 0.52 or less
- Ratio of the cross-sectional area A1 of the throat 3 to the cross-sectional area A2 of the injection port 4a (Suehiro ratio)
- A2ZA1 exceeds 1, the gas is adiabatically expanded and the injection flow velocity is supersonic, that is, greater than the sound velocity a.
- the high-density gas that has been heated and turned into plasma is excited by its heat into a highly reactive state, that is, a state in which it reacts easily on the object 15 to be treated.
- this highly reactive gas has a very high temperature. High, and in some cases up to ten thousand degrees, Les directly when jetted onto the treatment surface 1 5 may ejection target 1 5 can not withstand this temperature.
- the Laparl nozzle 1 since the Laparl nozzle 1 is designed to be adiabatically expanded as described above, it is rapidly cooled in the adiabatic expansion process until it reaches the injection target 15. To the appropriate temperature. Since the temperature at this time is determined by the divergent ratio A2ZA1, an arbitrary temperature can be obtained depending on the design conditions of the nozzle 1. As described above, the temperature of the gas 7 injected onto the processing target 15 can be adjusted to a temperature suitable for the processing, so that the quality of the film forming processing and the like can be improved.
- the highly reactive gas 7 moves at a supersonic velocity u, the time required to reach the injection target 15 is extremely short, and by the time the highly reactive gas 7 reaches the injection target 15, it is excited by heating and plasma. It does not return to its original state (reaction hard to occur): In this way, the temperature can be lowered to an appropriate temperature while the so-called excited state is frozen. Therefore, the adhesion between the object 15 to be treated and the reaction product is improved, and problems such as separation of the reaction product do not occur. Therefore, the quality of the film forming process and the like can be improved. Further, since the injection is completed in a short time, the film forming speed is increased, and the working efficiency is also improved.
- T0 T ⁇ (1/2) ⁇ ⁇ (r-1) / (r ⁇ R) ⁇ ⁇ (u) 2].
- T Static temperature of the flow (so-called temperature)
- the value of the total temperature TO is kept constant, so that the static temperature T decreases as the flow velocity u increases. In other words, the higher the flow speed, the more rapid the temperature drops.
- the value of the temperature ratio TO T increases in proportion to the square of the Mach number M-For example, 2
- the temperature ratio is T0ZT-6. That is, by adiabatically expanding and accelerating the reactive plasma heated to a high temperature to a high Mach number using the Rapar nozzle 1, it can be seen that the plasma temperature T can be lowered to a temperature suitable for the object 15 to be processed.
- the low-temperature high-speed plasma flow 7 having high activity is supplied as a highly directional particle bundle to the object 15 to be treated, it also has the feature that the usage efficiency of the source gas is extremely high.
- a highly-reacted, highly-reactive gas having a very small amount of impurities can be reduced to an arbitrary temperature. It can be lowered and sprayed onto the object 15 to be processed. As a result, the working efficiency can be dramatically improved, and the processing quality can be significantly improved.
- the coil 5 is provided in the throat portion 3, but the present invention is not limited to this, and the coil 5 can be provided at any location of the nozzle 1.
- FIG. 2 shows an embodiment in which the outlet pressure P1 of the nozzle 1 can be adjusted to an arbitrary pressure and the pressure ratio P1ZP0 can be set to an arbitrary value.
- the same reference numerals are given and duplicate descriptions are omitted.
- a throat section 3 and a gas injection pipe 4 are provided in a vacuum champ 8, and a support 14 for supporting an object 15 to be processed is provided in the champ 8. .
- the air in the vacuum chamber 8 is exhausted by an exhaust pump 13.
- the amount of gas supplied to the gas introduction pipe 2 is adjusted by the gas supply amount adjustment valve 11 provided in the gas supply pipe 16, and the outlet pressure P 1 of the injection gas 7 is adjusted by the P 1 adjustment valve 12.
- the pressure P0 in the gas introduction pipe 2 is detected by the P0 measurement gauge 9, and the outlet pressure P1 of the gas injection pipe 4 is detected by the P1 measurement gauge 10.
- the adjustment of 12 is performed, and the pressure ratio P1ZP0 is set to a predetermined value.
- Reference numeral 17 denotes a high-frequency power supply that supplies a current to the high-frequency induction coil 5.
- the high-frequency induction coil 5 was supplied with a current of 13.56 MHz at 1 kW while cooling.
- the durability of the tool tip 15 has been dramatically improved by such a diamond thin film deposition (diamond coating).
- a high-density and highly reactive gas mixture containing Si is supplied onto the substrate 15.
- a Si thin film was formed on the ceramic substrate 15.
- This Si thin film was evaluated by SEM observation and X-ray diffraction, it was found to be a dense polycrystalline film.
- the thickness of the Si thin film was about 60 m as a result of spraying (forming) for 30 minutes.
- NH4 gas and B2H6 gas were used as the source gas 6, c -BN can be formed.
- the gas is heated and turned into plasma by the high-frequency induction coil 5.
- Other electrodeless plasma devices such as plasma and helicon plasma may be used.
- a jet shield technique using an inert gas, a raw material gas, a dilution gas, or the like, which is used in ordinary plasma spraying or plasma welding, may be applied.
- all the gases 6 to be injected into the processing target 15 are supplied through the inlet 2 a (first embodiment) which is the inlet of the nozzle 1 or the inlet 2 a via the supply pipe 16.
- the gas 6 is supplied from the second embodiment, the gas 6 is supplied at a position upstream of the gas flow path from a position where the coil 5 where the gas 6 is heated and turned into plasma is disposed. It can be provided at any position.
- a doping material for forming a semiconductor such as a p-type or an n-type is mixed with a gas such as SiH4, and the mixed gas 6 is heated and turned into a plasma at a coil 5.
- the doping material may be supplied from a position further upstream than the above.However, since the doping material is very small, even if only the doping material is supplied from a position downstream from the position where the coil 5 is provided, the other It does not hinder the adiabatic expansion of gases such as SiH4-so doping materials may be supplied from a location downstream of the location where the gas is heated and turned into plasma.
- a highly reactive gas containing less impurities is generated, and the temperature of the gas is reduced to a temperature suitable for processing by the time the gas reaches the object to be processed, and Anti Since the reactive gas can reach the object to be processed in a short time at supersonic speed, the processing must be completed in a short time while maintaining high reactivity. Will be able to As a result, the quality of the thin film processing and the like is dramatically improved, and the work efficiency is dramatically improved.
- the present invention is not limited to the case of forming a thin film, but can be widely applied to industrial fields in which surface treatment is performed by gas injection.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Physics & Mathematics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Inorganic Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical Vapour Deposition (AREA)
- Plasma Technology (AREA)
- Coating By Spraying Or Casting (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP95918180A EP0767001A1 (en) | 1994-06-16 | 1995-05-12 | Surface treatment method by gas jetting and surface treatment device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6/134467 | 1994-06-16 | ||
JP13446794A JPH08990A (ja) | 1994-06-16 | 1994-06-16 | ガス噴射による表面処理方法および表面処理装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995034376A1 true WO1995034376A1 (fr) | 1995-12-21 |
Family
ID=15129009
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1995/000911 WO1995034376A1 (fr) | 1994-06-16 | 1995-05-12 | Procede de traitement de surfaces par jets de gaz et dispositif associe |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0767001A1 (ja) |
JP (1) | JPH08990A (ja) |
CA (1) | CA2192349A1 (ja) |
WO (1) | WO1995034376A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0851040A4 (en) * | 1995-08-29 | 2000-09-06 | Komatsu Mfg Co Ltd | SURFACE TREATMENT DEVICE WITH GASJET |
WO2023248165A1 (en) * | 2022-06-21 | 2023-12-28 | Atmospheric Plasma Solutions Inc. | Chemical conversion systems and methods |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2651481B2 (ja) * | 1987-09-21 | 1997-09-10 | 株式会社 半導体エネルギー研究所 | 超伝導材料の作製方法 |
JPH1050622A (ja) * | 1996-08-05 | 1998-02-20 | Komatsu Ltd | 表面処理装置用ノズル、表面処理装置およびこれを用いた表面処理方法 |
WO1998040533A1 (fr) * | 1997-03-13 | 1998-09-17 | Komatsu Ltd. | Dispositif et procede de traitement de surface |
DE102005004242B4 (de) * | 2005-01-29 | 2008-11-27 | Mtu Aero Engines Gmbh | Verfahren zur Herstellung von Triebwerkteilen |
JP2008052911A (ja) * | 2006-08-22 | 2008-03-06 | Shinku Device:Kk | プラズマ照射装置 |
JP2009082796A (ja) * | 2007-09-28 | 2009-04-23 | Tokyo Institute Of Technology | プラズマ処理装置及びプラズマ処理方法 |
JP6548019B2 (ja) | 2014-10-04 | 2019-07-24 | 三菱マテリアル株式会社 | 高純度銅電解精錬用添加剤と高純度銅製造方法 |
JP6548020B2 (ja) | 2014-10-04 | 2019-07-24 | 三菱マテリアル株式会社 | 高純度銅電解精錬用添加剤と高純度銅製造方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62247836A (ja) * | 1985-12-28 | 1987-10-28 | Canon Inc | 気相励起装置 |
JPH01179789A (ja) * | 1988-01-12 | 1989-07-17 | Fujitsu Ltd | ダイヤモンドの気相成長方法と熱プラズマ堆積方法およびプラズマ噴射装置 |
-
1994
- 1994-06-16 JP JP13446794A patent/JPH08990A/ja active Pending
-
1995
- 1995-05-12 WO PCT/JP1995/000911 patent/WO1995034376A1/ja not_active Application Discontinuation
- 1995-05-12 EP EP95918180A patent/EP0767001A1/en not_active Withdrawn
- 1995-05-12 CA CA 2192349 patent/CA2192349A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62247836A (ja) * | 1985-12-28 | 1987-10-28 | Canon Inc | 気相励起装置 |
JPH01179789A (ja) * | 1988-01-12 | 1989-07-17 | Fujitsu Ltd | ダイヤモンドの気相成長方法と熱プラズマ堆積方法およびプラズマ噴射装置 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0851040A4 (en) * | 1995-08-29 | 2000-09-06 | Komatsu Mfg Co Ltd | SURFACE TREATMENT DEVICE WITH GASJET |
WO2023248165A1 (en) * | 2022-06-21 | 2023-12-28 | Atmospheric Plasma Solutions Inc. | Chemical conversion systems and methods |
Also Published As
Publication number | Publication date |
---|---|
JPH08990A (ja) | 1996-01-09 |
EP0767001A1 (en) | 1997-04-09 |
CA2192349A1 (en) | 1995-12-21 |
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