WO2006095642A1 - ターゲット製造方法 - Google Patents
ターゲット製造方法 Download PDFInfo
- Publication number
- WO2006095642A1 WO2006095642A1 PCT/JP2006/304048 JP2006304048W WO2006095642A1 WO 2006095642 A1 WO2006095642 A1 WO 2006095642A1 JP 2006304048 W JP2006304048 W JP 2006304048W WO 2006095642 A1 WO2006095642 A1 WO 2006095642A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- atmosphere
- primary
- alloy
- additive
- target
- 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.)
- Ceased
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
-
- 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
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
-
- 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
- C23C14/3407—Cathode assembly for sputtering apparatus, e.g. Target
- C23C14/3414—Metallurgical or chemical aspects of target preparation, e.g. casting, powder metallurgy
Definitions
- the present invention relates to the technical field of sputtering targets, and more particularly to a technique for manufacturing a target in which an additive is added to a main material such as aluminum.
- A1 or using A1 alloy target if any force s to create a wiring thin film or reflective film.
- A1 alloy target with additive added to A1 is also a force Al1Cu target such as Al-Cu, the additive is dissolved in A1, so the resistivity of the formed A1 alloy thin film Will be higher than the A1 film.
- an alloy film such as Al_Nd can be annealed at high temperature while suppressing the occurrence of hillocks, and can reduce the specific resistance by annealing.
- a target in which an additive composed of a rare earth element is added to a main material having A1 force is described in, for example, the following document.
- Patent Document 1 Japanese Patent Laid-Open No. 2001-073124
- the present invention was created to solve the inconvenience when a target is produced by adding an additive to a main material by melting, and the target structure can be obtained without using a large vacuum chamber. Providing technology that can produce composite materials.
- the present invention creates a primary alloy in a molten state by adding an additive to a main metal in a primary atmosphere, and adds the main material to the primary alloy in a secondary atmosphere.
- the present invention is also a target manufacturing method in which the secondary atmosphere is an air atmosphere. Further, the present invention is the target manufacturing method in which the primary atmosphere is set to a pressure lower than that of the air atmosphere.
- the present invention is a target manufacturing method using aluminum (A1) as the main material.
- the present invention is a target manufacturing method using a combustible metal that ignites when dissolved in air in the additive. .
- any one or two or more substances of Ce, Pr, Dy, or Y are used for the additive, and the additive is included in the sputtering target in an amount of 0.5 atomic% to 5 atomic%. It is a target manufacturing method.
- the present invention also provides a target manufacturing method wherein the oxygen partial pressure in the primary atmosphere is set to a pressure of 0.2 Pa or less.
- the present invention is a target manufacturing method in which the primary atmosphere is set to a pressure of 130 Pa or more.
- the temporary atmosphere is formed in a vacuum chamber, and the main material is formed in the vacuum chamber.
- a target manufacturing method for adding the additive to a material wherein after depressurizing the inside of the vacuum chamber to a pressure of 1 Pa or less, an inert gas is introduced to a pressure of 130 Pa or more, and the primary pressure is set in the vacuum chamber. It is the target manufacturing method which forms atmosphere.
- the present invention is configured as described above, and an additive that easily ignites when heated in the atmosphere is melted in a primary atmosphere of low oxygen and mixed with a molten main material to form a primary alloy. ing.
- the additive may be melted by covering the molten main material with the solid state additive.
- the main material may be melted by adding a small amount of the solid main material to the additive.
- the primary alloy in the molten state is cooled in the primary atmosphere to be solid, and the primary alloy is stable in the atmosphere even if it contains a high concentration of the additive. Cool down.
- the primary alloy does not ignite even when melted in the atmosphere, the primary material can be added to the molten primary alloy in the atmosphere, and the amount of the primary alloy can be increased to form a secondary alloy. it can. Therefore, since a large amount of secondary alloy can be obtained from a small amount of primary alloy in the atmosphere, a vacuum chamber that forms a primary atmosphere for the primary alloy as compared with the case where all the additives and main materials are melted in a vacuum chamber. Is small.
- the obtained secondary alloy is a target material, and when the secondary alloy is formed into a desired shape such as a square plate shape or a disk shape, a sputtering target is obtained. It may be attached to a copper backing plate.
- the oxygen partial pressure is theoretically sufficient to prevent oxidation of the additive and the main material.
- the inventors of the present invention have experimentally confirmed that when the additive is Ce, ignition does not occur if the oxygen partial pressure in the primary atmosphere is 0.2 Pa or less. The same is expected for other substances (Pr, Dy or Me).
- the pressure of the primary atmosphere may be atmospheric pressure, but in order to remove the gas released from the molten main material and the molten additive, a vacuum chamber is used. It is desirable to evacuate the inside. For this purpose, it is easy to set the primary atmosphere to a pressure lower than atmospheric pressure.
- the primary atmosphere is too low, from the molten main material and the molten additive, The vapor of the main material and additives is generated, and the composition of the primary alloy is stable.
- the primary atmosphere should have a pressure of 130 Pa or higher.
- the atmospheric pressure in order to suppress the vapor release of Ce, which is the main material, anoreminium, and to keep the composition ratio of the primary metal constant, It is desirable to set the atmospheric pressure to 2600Pa or higher.
- an inert gas is introduced into the vacuum chamber and the pressure is increased to an inert gas with a pressure of 130 Pa or more, or 2600 Pa or more.
- a primary atmosphere consisting of an atmosphere is formed.
- a flammable additive is added in a low oxygen atmosphere such as a vacuum atmosphere or an inert gas atmosphere lower than atmospheric pressure, there is no risk of ignition.
- the main material is covered and increased in the atmosphere, so that a large amount of target material can be obtained without using a large vacuum chamber.
- FIG. 1 is a diagram for explaining a production process of a primary alloy.
- Reference numeral 10 in FIG. 1 denotes a primary melting apparatus, which has a vacuum chamber 11.
- a primary melting crucible 12 is disposed inside the vacuum chamber 11.
- the vacuum chamber 11 has an inert gas introduction system 1
- a main material here, aluminum: A1
- an additive here, cerium: Ce
- a vacuum exhaust system 17 Is evacuated to a pressure below lPa.
- an inert gas (in this case, argon gas) is introduced from the inert gas introduction system 15 into the vacuum chamber 11, the pressure inside the vacuum chamber 11 is increased to 2600Pa, and the pressure is lower than that of the atmosphere. A primary atmosphere at an oxygen pressure is formed.
- argon gas in this case, argon gas
- Main materials in the primary melting crucible 12 are energized through the induction induction heating coil 14 while maintaining the primary atmosphere at a lower pressure and lower oxygen pressure by continuously evacuating and introducing inert gas. And the additive is heated and melted to obtain a molten primary alloy 13.
- the molten primary alloy 13 was poured into a mold 16 disposed inside the vacuum chamber 11, and a solid primary alloy (primary alloy ingot) 18 was obtained.
- the focus was on Mold 16 in the primary atmosphere.
- Reference numeral 20 in FIG. 2 denotes a secondary melting apparatus, which has a secondary melting crucible 21.
- the secondary melting crucible 21 is placed in a secondary atmosphere composed of atmospheric components and atmospheric pressure.
- a primary alloy 18 in a solid state is placed in a secondary melting crucible 21, and a main material is added at a predetermined ratio.
- the heater 29 is energized to generate heat, and the primary alloy 18 and the main material are melted in a secondary atmosphere. As a result, the molten secondary alloy 22 is obtained. Since the main material is added to the primary alloy 18, the ratio of the additive in the secondary alloy 22 to the main material is lower than the ratio of the additive in the primary alloy 13, 18 to the main material. .
- the main material to be added is an amount so that the additive in the secondary alloy 22 is contained in a desired ratio.
- the molten secondary alloy 22 is poured into the water-cooled mold 24, and a solid state secondary alloy (secondary alloy ingot) is obtained by the continuous forging device 26.
- the secondary alloy in the solid state is homogenized by a plastic cage, and then subjected to mechanical processing such as cutting to obtain a sputtering target of a predetermined size.
- a thin film sample was formed by sputtering a target obtained from a secondary alloy in which A1 is the main material and the additive is Ce.
- the resistance value decreased by annealing the obtained thin film.
- the main material is not limited to A1, but includes a wide range of meltable materials in addition to Cu and other metals.
- the method of the present invention is suitable when an additive that ignites at a low temperature in the atmosphere and cannot be melted in the atmosphere is added.
- the additive is not limited to Ce, but rare earth elements such as Y, Pr, and Dy are suitable as targets for preventing hillocks.
- the above is a force that uses argon gas as an inert gas.
- an inert gas for forming a low oxygen atmosphere an inert gas such as nitrogen gas can be widely used in addition to a rare gas such as argon. .
- the additive when a target was prepared by using A1 as the main material and any one of rare earth elements of Ce, Y, Pr, or Dy as an additive, and a thin film was formed, the additive was For the target of 5 atomic% or less, the resistance value of the thin film was 5 ⁇ cm or less, which was sufficiently low compared with 3 ⁇ cm in the case of the thin film made of the aluminum target.
- an alloy with 5 atomic% Ce added to A1 is different from an alloy with Nd added in the same amount. Normal discharge was low. Furthermore, in the alloy added with 5 atomic% of any one of Ce, Y, Pr, and Dy, the generation of foreign matter was less than when adding more than that.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physical Vapour Deposition (AREA)
- Electrodes Of Semiconductors (AREA)
Abstract
Description
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200680006500XA CN101133181B (zh) | 2005-03-10 | 2006-03-03 | 靶的制造方法 |
| JP2007507078A JP4676487B2 (ja) | 2005-03-10 | 2006-03-03 | ターゲット製造方法 |
| EP06715131A EP1860207B1 (en) | 2005-03-10 | 2006-03-03 | Process for target production |
| NO20074376A NO20074376L (no) | 2005-03-10 | 2007-08-28 | Fremgangsmate for a produsere et mal |
| US11/896,124 US20080069724A1 (en) | 2005-03-10 | 2007-08-29 | Method for producing a target |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005-066721 | 2005-03-10 | ||
| JP2005066721 | 2005-03-10 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US11/896,124 Continuation US20080069724A1 (en) | 2005-03-10 | 2007-08-29 | Method for producing a target |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006095642A1 true WO2006095642A1 (ja) | 2006-09-14 |
Family
ID=36953242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2006/304048 Ceased WO2006095642A1 (ja) | 2005-03-10 | 2006-03-03 | ターゲット製造方法 |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20080069724A1 (ja) |
| EP (1) | EP1860207B1 (ja) |
| JP (1) | JP4676487B2 (ja) |
| KR (1) | KR20070113209A (ja) |
| CN (1) | CN101133181B (ja) |
| NO (1) | NO20074376L (ja) |
| TW (1) | TWI361841B (ja) |
| WO (1) | WO2006095642A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111593216A (zh) * | 2020-06-03 | 2020-08-28 | 福建阿石创新材料股份有限公司 | 一种铝钪合金靶材的及其制备方法和应用及真空自耗电弧炉 |
| JP2021023967A (ja) * | 2019-08-05 | 2021-02-22 | 株式会社神戸製鋼所 | Ti−Al基合金の鋳造方法 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113106407B (zh) * | 2021-03-26 | 2022-07-26 | 福建省长汀金龙稀土有限公司 | 一种稀土金属及稀土合金旋转靶材的制造装置及方法 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10317082A (ja) * | 1997-05-20 | 1998-12-02 | Sumitomo Metal Mining Co Ltd | ターゲット材用Al系合金とその製造方法 |
| WO1999034028A1 (fr) * | 1997-12-24 | 1999-07-08 | Kabushiki Kaisha Toshiba | CIBLE DE PULVERISATION, FILM D'INTERCONNEXION A BASE D'Al ET COMPOSANT ELECTRONIQUE |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4080200A (en) * | 1977-02-23 | 1978-03-21 | A. Johnson & Co. Inc. | Process for alloying metals |
| JPH10270446A (ja) * | 1997-03-24 | 1998-10-09 | Internatl Business Mach Corp <Ibm> | 多層配線層および金属配線層の形成方法 |
| JP2001073124A (ja) * | 1999-09-06 | 2001-03-21 | Honeywell Electronics Japan Kk | スパッタリングターゲット |
| US20040191111A1 (en) * | 2003-03-14 | 2004-09-30 | Beijing University Of Technology | Er strengthening aluminum alloy |
-
2006
- 2006-03-03 EP EP06715131A patent/EP1860207B1/en not_active Ceased
- 2006-03-03 WO PCT/JP2006/304048 patent/WO2006095642A1/ja not_active Ceased
- 2006-03-03 KR KR1020077019544A patent/KR20070113209A/ko not_active Ceased
- 2006-03-03 CN CN200680006500XA patent/CN101133181B/zh not_active Expired - Fee Related
- 2006-03-03 JP JP2007507078A patent/JP4676487B2/ja not_active Expired - Lifetime
- 2006-03-09 TW TW095107960A patent/TWI361841B/zh not_active IP Right Cessation
-
2007
- 2007-08-28 NO NO20074376A patent/NO20074376L/no not_active Application Discontinuation
- 2007-08-29 US US11/896,124 patent/US20080069724A1/en not_active Abandoned
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10317082A (ja) * | 1997-05-20 | 1998-12-02 | Sumitomo Metal Mining Co Ltd | ターゲット材用Al系合金とその製造方法 |
| WO1999034028A1 (fr) * | 1997-12-24 | 1999-07-08 | Kabushiki Kaisha Toshiba | CIBLE DE PULVERISATION, FILM D'INTERCONNEXION A BASE D'Al ET COMPOSANT ELECTRONIQUE |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021023967A (ja) * | 2019-08-05 | 2021-02-22 | 株式会社神戸製鋼所 | Ti−Al基合金の鋳造方法 |
| CN111593216A (zh) * | 2020-06-03 | 2020-08-28 | 福建阿石创新材料股份有限公司 | 一种铝钪合金靶材的及其制备方法和应用及真空自耗电弧炉 |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200702470A (en) | 2007-01-16 |
| EP1860207A1 (en) | 2007-11-28 |
| EP1860207B1 (en) | 2011-07-27 |
| NO20074376L (no) | 2007-10-22 |
| CN101133181A (zh) | 2008-02-27 |
| JPWO2006095642A1 (ja) | 2008-08-14 |
| TWI361841B (en) | 2012-04-11 |
| CN101133181B (zh) | 2012-01-25 |
| KR20070113209A (ko) | 2007-11-28 |
| US20080069724A1 (en) | 2008-03-20 |
| JP4676487B2 (ja) | 2011-04-27 |
| EP1860207A4 (en) | 2009-09-16 |
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