WO2006049328A1 - プラズマ発生方法及び装置並びに該方法及び装置を利用した低圧マグネトロンスパッタリング方法及び装置 - Google Patents
プラズマ発生方法及び装置並びに該方法及び装置を利用した低圧マグネトロンスパッタリング方法及び装置 Download PDFInfo
- Publication number
- WO2006049328A1 WO2006049328A1 PCT/JP2005/020673 JP2005020673W WO2006049328A1 WO 2006049328 A1 WO2006049328 A1 WO 2006049328A1 JP 2005020673 W JP2005020673 W JP 2005020673W WO 2006049328 A1 WO2006049328 A1 WO 2006049328A1
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- WO
- WIPO (PCT)
- Prior art keywords
- magnetic field
- electrode
- vacuum chamber
- plasma
- pressure
- 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.)
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Classifications
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- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/35—Sputtering by application of a magnetic field, e.g. magnetron sputtering
Definitions
- the present invention relates to a plasma generation method and apparatus, and a low-pressure magneto-sputtering method and apparatus using the method and apparatus.
- Non-Patent Document 1 it is also known that the amount of sputtering gas taken into the film decreases during film deposition.
- the plasma is confined by a magnetic field by using a magnetron sputtering method in which a magnetic circuit is formed on the back surface of the force sword and a leakage magnetic field is generated on the cathode surface.
- the influence of the plasma on the substrate to be formed can be reduced, and the film deposition rate can be increased.
- the plasma formation pressure for performing magnetron sputtering was high, so it could not be used under low pressure conditions.
- a magneto-sputtering method under a low-pressure condition can be achieved by increasing the leakage magnetic field from a permanent magnet or an electromagnet provided on the back of the target in order to form a magneto-plasma under a low-pressure condition.
- a permanent magnet instead of a Ferai ⁇ magnet, a material with a strong coercive force such as S m Co or N d F e B is used, and a leakage magnetic field on the cathode surface is used. I try to increase the amount.
- a third electrode capable of supplying thermionic electrons in the vicinity of the magnetron force sword is provided independently of the force sword and the anode so that the electron density necessary for magneto-mouth discharge can be maintained even under a low pressure.
- thermionic sputtering is performed under low pressure conditions by supplying thermal electrons to the substrate.
- the discharge pressure obtained may not be at a low pressure level that can sufficiently satisfy the required film densification and film surface smoothness.
- the elements for generating plasma include pressure P, magnetic field ⁇ , and voltage V applied to the electrodes.
- the lower discharge pressure P for plasma generation decreases.
- the lower limit pressure at which plasma discharge does not occur is expressed as a function of the magnetic field (zero) and the voltage V applied to the electrode. Since the voltage V can be changed relatively freely, it is said that the strength of the magnetic field dominates the discharge lower limit pressure.
- the present invention solves the problems of the prior art as described above, It is also possible to generate plasma and use this to form a dense and smooth film.
- a first object of the present invention is to provide a plasma generation method and apparatus capable of generating plasma even in an extremely low pressure space.
- a second object of the present invention is to provide a low-pressure magnetron sputtering method and apparatus capable of forming a dense and smooth film using the plasma generation method and apparatus.
- the plasma generation method according to the first invention of the present invention generates a magnetic field of at least 2000 ellsted or more at a plasma generation position in a vacuum chamber as an inert gas species.
- 0 X 10- 3 P a ⁇ l. 2X 10 2 and by sea urchin set becomes P a is characterized in that a plasma is generated.
- a voltage is applied to an electrode disposed in a vacuum chamber, a magnetic field is generated in a vacuum chamber by a magnetic field generating means, and an inert gas species is introduced to generate plasma.
- a plasma generation method that uses xenon or krypton in a pressure region where no plasma is generated even when the voltage is increased with respect to a predetermined magnetic field when argon is used as the inert gas species. It is characterized by that.
- the plasma generator according to the third aspect of the present invention includes an electrode disposed in a vacuum chamber, a power source for applying a voltage to the electrode, and a magnetic field of at least 2000 Kersted at a plasma generation position in the vacuum chamber. a magnetic field generating means for generating a gas pressure in the vacuum chamber 5. 0 X 10 _3 P a ⁇ l. gas introduction to introduce xenon or krypton gas into the vacuum chamber so as to 2X 10- 2 P a Means.
- an electrode is provided in a vacuum chamber, a target is mounted on the surface of the electrode, and the back surface of the electrode
- a magnetic field is generated on the target surface by the magnetic field generating means to generate plasma, and the target is sputtered, a magnetic field of at least 200 elsted or more at the plasma generation position
- the gas pressure is set to 5.0 X 1 0— 3 P a to l. 2 X 1 0 2 Pa, and the plasma And sputtering the target.
- an electrode to which a voltage is applied is provided in a vacuum chamber, a target is mounted on the surface of the electrode, magnetic field generating means is provided on the back side of the electrode, and the magnetic field generating means
- a low-pressure magnetron sputtering method that forms a magnetic field on the target surface, introduces an inert gas species, generates plasma, and then sputters the target, when argon is used as the inert gas species for a given magnetic field.
- the plasma is generated using xenon or krypton in a pressure region in which plasma is not generated even when the voltage applied to the electrode is increased.
- a low-pressure magnetron sputtering apparatus includes an electrode disposed in a vacuum chamber, a power source for applying a voltage to the electrode, a target mounted on the surface of the electrode, A magnetic field generating means that is mounted on the back side of the electrode and generates a magnetic field of at least 200 ° Oersted at the plasma generation position on the target surface, and the gas pressure in the vacuum chamber is 5.0 X 1 0— 3 P a to l. 2 X 1 0— 2 Pa, and a gas introduction means for introducing xenon gas into the vacuum chamber.
- the low-pressure magnetron sputtering apparatus includes an electrode disposed in a vacuum chamber, a power source for applying a voltage to the electrode, a target mounted on the surface of the electrode, Mounted on the back side, target table A magnetic field generating means for generating at least 2250 Erusutetsudo more magnetic field to the plasma generation position on the surface, so that the gas pressure in the vacuum chamber is 5. 0X 10- 3 P a ⁇ l. 2 X 10- 2 P a And a gas introducing means for introducing krypton gas into the vacuum chamber.
- a magnetic field of at least 2000 Elsted is generated at the plasma generation position in the vacuum chamber, xenon or krypton gas is used as the inert gas species, and the gas pressure is 5 . 0X 10 one 3 P to l.
- a magnetic field of at least 2000 Elsted is generated at the plasma generation position, xenon or krypton gas is used as the inert gas species, and the gas pressure is 5.0X 1 0 1 3 Pa ⁇ ; 1.
- an electrode disposed in a vacuum chamber, a power source for applying a voltage to the electrode, a target mounted on the surface of the electrode, and the electrode And a magnetic field generating means for generating a magnetic field of at least 2 0,000 Elsted and at least 2 2 5 0 Oersted at the plasma generation position on the target surface, respectively, and a gas pressure in the vacuum chamber of 5 0 X 1 0 to 3 Pa to 1.2 X 1 0 2 It has a gas introduction means for introducing xenon gas or krypton gas into the vacuum chamber so that the pressure becomes 2 Pa, so low pressure conditions Thus, it is possible to provide a low-pressure magnetron sputtering apparatus capable of generating plasma and forming a dense and smooth film.
- FIG. 1 is a schematic diagram of a low-pressure gun-net sputtering apparatus according to an embodiment of the present invention.
- FIG. 2 is a graph showing the relationship between the discharge lower limit pressure and the leakage magnetic field in the operation of the apparatus of FIG.
- Figure 3 is a diagram showing the relationship between the gas pressure and the voltage applied to the cathode electrode body.
- FIG. 1 schematically shows the overall configuration of a magneto-mouth sputtering apparatus according to an embodiment of the present invention.
- reference numeral 1 denotes a vacuum chamber
- a cathode electrode assembly 2 is disposed in the vacuum chamber 1.
- the cathode electrode assembly 2 has a force sword electrode body 3, and a voltage is applied to the cathode electrode body 3 from an external power source 4.
- a magnet 5 is disposed on the back side of the cathode electrode body 3, and a target 6 is mounted on the surface of the force sword electrode body 3.
- a film-forming substrate 7 is disposed in the vacuum chamber 1 so as to face the surface of the force sword electrode body 3, that is, the target 6. Further, the gas introduction system 8 is set vignetting in the vacuum chamber 1, the gas introduction system 8, the gas pressure in the vacuum chamber 1 is 5. 0 X 1 0- 3 P a ⁇ l. 2 X 1 0- 2 Xenon gas or krypton gas is introduced into the vacuum chamber 1 so as to be Pa.
- the vacuum chamber 1 is connected to a vacuum exhaust system 9.
- Figure 2 shows the relationship between the discharge lower limit pressure and the leakage magnetic field. It is recognized that the discharge lower limit pressure decreases as the amount of leakage magnetic field (parallel component) increases.
- xenon gas used as the sputter gas
- the magnetronsno and the discharge lower limit pressure at which tattering is possible are 1.3.
- an X 1 0 one 1 P a the discharge lower limit pressure when the leakage magnetic field amount obtained in the region of the upper 1 O mm 2 5 5 0 Erusutetsudo target 6 was 6 X 1 0- 3 P a.
- the discharge lower limit pressure at which magneto-open sputtering is possible is 2. 4 X 1 0- 1 P a der is, the discharge lower limit pressure when the leakage magnetic field amount obtained in the region of the upper 1 O mm 2 5 5 0 El Sutetsudo target 6 is met 8 X 1 0- 3 P a It was.
- the discharge lower limit pressure at which magneto-sputtering can be performed is 3.4 5 X 1 0 1 2 Pa, above 1 0 fringing field amount obtained in the region of mm 2 5 target 6 - discharge lower limit pressure at the time of 5 0 Erusutetsudo was 1 2 X 1 0- 2 P a ..
- magnetron sputtering can be performed even if a magnet having a maximum leakage magnetic field in the region of 1 O mm above the target 6 is, for example, 2600 est. possible discharge lower limit pressure is 1.
- a 2 X 1 0- 2 P a blind, but from lower discharge is not Erare it, when the xenon gas or krypton gas was used as sputtering gas, argon gas
- the discharge could be maintained even at a pressure lower than the discharge lower limit pressure at which the discharge could not be maintained, and the pressure at that time was on the order of 10 _ 3 Pa.
- the xenon gas or krypton gas has a lower discharge lower pressure than the anoregon gas at the same leakage magnetic field amount. Therefore, it is possible to discharge in a low pressure range that is not discharged with argon gas.
- FIG. 3 shows the relationship between the gas pressure of xenon gas and krypton gas and the voltage V applied to the force sword electrode body 3 in comparison with the case where argon gas is used as the sputtering gas.
- Table 1 shows the measured values of the graph shown in Fig. 3.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physical Vapour Deposition (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004-321839 | 2004-11-05 | ||
| JP2004321839 | 2004-11-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006049328A1 true WO2006049328A1 (ja) | 2006-05-11 |
Family
ID=36319317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2005/020673 Ceased WO2006049328A1 (ja) | 2004-11-05 | 2005-11-04 | プラズマ発生方法及び装置並びに該方法及び装置を利用した低圧マグネトロンスパッタリング方法及び装置 |
Country Status (2)
| Country | Link |
|---|---|
| TW (1) | TW200622016A (ja) |
| WO (1) | WO2006049328A1 (ja) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61223178A (ja) * | 1985-03-29 | 1986-10-03 | Toshio Sugita | 皮膜形成装置 |
| JPH03279294A (ja) * | 1990-03-29 | 1991-12-10 | Mitsubishi Materials Corp | エピタキシャル層の成長方法 |
| JPH05263226A (ja) * | 1992-03-17 | 1993-10-12 | Fujitsu Ltd | 薄膜形成方法 |
| JPH07305166A (ja) * | 1993-09-03 | 1995-11-21 | Inst Of Physics Of Acad Of Sciences Of Czecho Republic | マグネトロンスパッタリング方法 |
| JPH10140332A (ja) * | 1996-11-08 | 1998-05-26 | Anelva Corp | 非晶質ito膜の作製方法 |
| JP2004331998A (ja) * | 2003-04-30 | 2004-11-25 | Nikon Corp | 多層膜成膜方法、反射鏡及び露光装置 |
-
2005
- 2005-11-04 TW TW094138868A patent/TW200622016A/zh unknown
- 2005-11-04 WO PCT/JP2005/020673 patent/WO2006049328A1/ja not_active Ceased
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61223178A (ja) * | 1985-03-29 | 1986-10-03 | Toshio Sugita | 皮膜形成装置 |
| JPH03279294A (ja) * | 1990-03-29 | 1991-12-10 | Mitsubishi Materials Corp | エピタキシャル層の成長方法 |
| JPH05263226A (ja) * | 1992-03-17 | 1993-10-12 | Fujitsu Ltd | 薄膜形成方法 |
| JPH07305166A (ja) * | 1993-09-03 | 1995-11-21 | Inst Of Physics Of Acad Of Sciences Of Czecho Republic | マグネトロンスパッタリング方法 |
| JPH10140332A (ja) * | 1996-11-08 | 1998-05-26 | Anelva Corp | 非晶質ito膜の作製方法 |
| JP2004331998A (ja) * | 2003-04-30 | 2004-11-25 | Nikon Corp | 多層膜成膜方法、反射鏡及び露光装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200622016A (en) | 2006-07-01 |
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