WO2013047232A1 - スパッタリング用タンタル製コイルの再生方法及び該再生方法によって得られたタンタル製コイル - Google Patents
スパッタリング用タンタル製コイルの再生方法及び該再生方法によって得られたタンタル製コイル Download PDFInfo
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- WO2013047232A1 WO2013047232A1 PCT/JP2012/073586 JP2012073586W WO2013047232A1 WO 2013047232 A1 WO2013047232 A1 WO 2013047232A1 JP 2012073586 W JP2012073586 W JP 2012073586W WO 2013047232 A1 WO2013047232 A1 WO 2013047232A1
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- coil
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- tantalum
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- regenerating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/34—Gas-filled discharge tubes operating with cathodic sputtering
- H01J37/3476—Testing and control
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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
-
- 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
- C23C14/56—Apparatus specially adapted for continuous coating; Arrangements for maintaining the vacuum, e.g. vacuum locks
- C23C14/564—Means for minimising impurities in the coating chamber such as dust, moisture, residual gases
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/32798—Further details of plasma apparatus not provided for in groups H01J37/3244 - H01J37/32788; special provisions for cleaning or maintenance of the apparatus
- H01J37/32853—Hygiene
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/32798—Further details of plasma apparatus not provided for in groups H01J37/3244 - H01J37/32788; special provisions for cleaning or maintenance of the apparatus
- H01J37/3288—Maintenance
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/34—Gas-filled discharge tubes operating with cathodic sputtering
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/34—Gas-filled discharge tubes operating with cathodic sputtering
- H01J37/3411—Constructional aspects of the reactor
- H01J37/3447—Collimators, shutters, apertures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49718—Repairing
- Y10T29/49748—Repairing by shaping, e.g., bending, extruding, turning, etc.
Definitions
- a coil in order to prevent generation of particles and arcing, a coil is arranged so as to surround a space between the substrate and the sputtering target in the sputtering apparatus.
- the present invention relates to a method for regenerating a tantalum coil for sputtering, which regenerates the coil by removing sputtered particles deposited on the surface of a used coil, and a regenerated tantalum coil.
- the tantalum coil for sputtering has a curved surface as shown in the drawings, which will be described later, but the surface of the coil can be an inner surface or an outer surface. Therefore, “the surface of the coil” described below means both the inner surface and the outer surface of the coil. The same applies hereinafter.
- a sputtering method capable of easily controlling the film thickness and components has been frequently used as one of film forming methods for materials for electronic and electrical parts.
- a target composed of a positive electrode and a negative electrode is opposed to each other, and an electric field is generated by applying a high voltage between the substrate and the target in an inert gas atmosphere.
- Ionized electrons collide with inert gas to form a plasma, and cations in the plasma collide with the target (negative electrode) surface to strike out target constituent atoms, and the surface of the substrate where the ejected atoms face each other
- This is based on the principle that a film is formed by adhering to the film.
- a coil is arranged in a space portion between a sputtering target and a substrate to increase the density of plasma and to make the flying sputtered particles face the substrate as much as possible.
- the sputtering rate is increased, the uniformity of the film is improved, and the quality of the film deposited on the substrate can be improved comprehensively.
- This coil may be sputtered and eroded, but may not be sputtered and sputtered particles may come and adhere (a redeposited film may be formed). This changes according to the bias to the coil (see Patent Documents 1 and 2).
- the coil material is often the same material as the target material or a material constituting a part of the material constituting the sputtered film deposited on the substrate.
- the shape of the coil ranges from a circular shape to a spiral type (see Patent Documents 1, 2, and 3), and there are examples in which these are arranged in multiple stages.
- the coil as described above is arranged between the target and the substrate to increase the plasma density and to make the flying sputtered particles face the substrate as much as possible
- the thin film forming apparatus other than the substrate Although the amount of flight to the inner wall and the equipment inside is reduced, there is a problem that it accumulates on the coil itself.
- Patent Document 3 proposes that the upper end on the inner surface side of the coil is scraped to reduce the thickness of the inner periphery.
- the upper end of the coil is sharply pointed upward, so that deposits that should accumulate on the top of the coil will not be washed off and collected, and new sputtered particles will collide and clean.
- the upper part of the coil is not the only part deposited by sputtering. It can also deposit on the surface of the coil, ie the outer and inner surfaces. In this case, the flakes peeled off from the surface of the coil on which the sputtered particles are deposited are scattered and adhered directly to the substrate surface, causing the generation of particles, but this measure is not taken. As described above, the generation of particles from such locations is also a major problem because of the demand for higher integration and miniaturization of electronic device circuits.
- Patent Document 4 discloses that a diamond-like or cross-hatch-like (mesh-like) pattern is formed by knurling on a coil used for a flange, a side wall, a shield, a cover ring and the like of a target.
- the depth is 0.350 mm to 1.143 mm.
- the unevenness of the processed surface is a simple shape, there is a possibility that a sufficient anchor effect cannot be obtained.
- Patent Document 5 proposes that the deposited material is exposed to at least one etching solution selected from the group consisting of H 3 PO 4 , HNO 3 and HF in order to extend the reuse life of the processing kit.
- Patent Document 6 and Patent Document 7 propose to remove particles (redeposited film) attached by etching or pickling. In order to remove the redeposite membrane stably and efficiently with these techniques, there are still further improvements.
- an object of the present invention is to efficiently regenerate a tantalum coil, thereby eliminating the waste of manufacturing a new coil, improving productivity, and providing a technique that can stably provide the coil. If the coil can be regenerated, it is possible to improve the quality and productivity of electronic components and provide a technology that can stably provide semiconductor elements and devices.
- the present invention is 1) A method for regenerating a tantalum coil for sputtering disposed between a substrate and a sputtering target, wherein a used tantalum coil is cut entirely or partially to form irregularities and knurling on a redeposited film or an erosion part.
- the tantalum for sputtering is characterized by removing the redeposition film formed during sputtering by cutting until a smooth surface is obtained after removing the processing trace, and then applying new knurling to the cut location.
- a method for regenerating a coil is defined as Ra ⁇ 1.6 ⁇ m.
- the present invention also provides: 2) Cutting and cutting conditions of 0.4 to 0.8 mm, feed 0.05 to 0.2 mm / rev, and rotation speed 20 to 80 rpm eliminate the unevenness and knurling marks on the redeposited film or erosion part, and smooth
- the method for regenerating a tantalum coil for sputtering according to any one of claims 1 to 4) 4)
- the roughness of the new knurling process is Ra ⁇ 15 ⁇ m.
- Regeneration method of tantalum coil for sputtering 5) Variation in coil thickness after newly knurled coiling (difference between maximum thickness and minimum thickness) The method for regenerating a tantalum coil for sputtering according to any one of 1 to 4 above, wherein the cutting amount is adjusted according to the thickness of the redeposited film, The method for regenerating a tantalum coil for sputtering according to any one of 1 to 5 above. 7) The tantalum coil for sputtering obtained by the method for regenerating a tantalum coil for sputtering according to any one of 1 to 6 above. Coil.
- sputtered particles are deposited (redeposited) on the surface of a tantalum coil placed between the substrate and the sputtering target.
- the sputtered particles deposited on the used coil are cut after the sputtering is completed.
- coil reproduction can be performed easily and with high accuracy, so that it is possible to improve the quality and productivity of electronic components and provide a technology that can stably provide semiconductor elements and devices.
- the sputtered particles deposited on the surface of the coil are peeled off, and the flakes are scattered and attached to the substrate surface, preventing the generation of particles, The occurrence of arcing can be suppressed, and the removal of sputtered particles deposited on the surface of the coil can be effectively suppressed.
- particles sputtered from the tantalum target are not only on the wafer but also on the surface of the tantalum coil around the target.
- Deposit and deposit form redepo film. Also, this coil expands upon receiving heat during sputtering.
- the film peels off due to an increase in stress, and the film flies and adheres to the substrate, causing particles and arcing.
- the coil is knurled, the surface is roughened, and the peeling resistance is improved.
- This knurling process is to form irregularities by strongly pressing the knurl against the work or cutting the work with the knurl.
- the present invention can perform such a knurling coil regeneration process.
- a typical example of a knurled coil is shown in FIG.
- the used tantalum coil As described above, particles scattered by sputtering adhere to the used tantalum coil. In general, this is called a redepo film.
- the cost can be reduced.
- the entire surface or a part of the used tantalum coil is drawn by cutting to remove the redeposit film formed during sputtering.
- One surface drawing in this case means cutting until the unevenness of the redeposited film or the erosion part and the knurling trace are eliminated, that is, until a smooth surface is obtained.
- the cutting conditions in this case are as follows.
- the cutting depth is 0.4 to 0.8 mm
- the feed is 0.05 to 0.2 mm / rev
- the rotation speed is 20 to 80 rpm.
- a new knurling is applied to the cut portion to regenerate the tantalum coil for sputtering.
- the variation in the coil thickness after the new knurling process difference between the maximum thickness and the minimum thickness
- the variation in the coil thickness is large, the coil may be deformed into a deformed shape due to the thermal effects of sputtering when reused, and the thickness of the redeposited film or the erosion part of the coil is likely to fluctuate. It is.
- the amount of cutting can be adjusted by the thickness of the redeposition film or the thickness of the coil portion that has undergone erosion.
- the present invention can provide a tantalum coil for sputtering obtained by the method for regenerating a tantalum coil for sputtering as described above.
- a tantalum coil regenerated under the conditions of the present invention can ensure the same quality as a new coil.
- Example 2 For a coil in which a redepo film is attached to a part of the coil and half of the coil is subjected to erosion, the inner surface, the upper and lower edge portions, and the outer surface are cut into 0.8 mm, the feed is 0.2 mm / rev, and the rotational speed is 20 to 50 rpm.
- One surface was drawn by cutting. That is, cutting was performed until the redeposited film and the knurling trace disappeared and became smooth. Next, a new knurling process was performed on the cut portion.
- sputter particles are deposited (redeposited) on the surface of a tantalum coil disposed between a substrate and a sputtering target during sputtering. It is possible to cut the sputtered particles and efficiently regenerate the tantalum coil, thereby eliminating the waste of new coil production, improving productivity, and providing an excellent effect that can stably provide the coil. Have.
- coil reproduction can be performed easily and with high accuracy, so that it is possible to improve the quality and productivity of electronic components and provide a technology that can stably provide semiconductor elements and devices.
- this regenerative coil as with a new coil, the sputtered particles deposited on the surface of the coil are peeled off, and the flakes are scattered and attached to the substrate surface, preventing the generation of particles, Since arcing can be suppressed and the spattering of the sputtered particles deposited on the surface of the coil can be effectively suppressed, it is useful for a sputtering apparatus using a tantalum coil.
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Abstract
Description
このスパッタリング法は正の電極と負の電極とからなるターゲットとを対向させ、不活性ガス雰囲気下でこれらの基板とターゲットの間に高電圧を印加して電場を発生させるものであり、この時電離した電子と不活性ガスが衝突してプラズマが形成され、このプラズマ中の陽イオンがターゲット(負の電極)表面に衝突してターゲット構成原子を叩きだし、この飛び出した原子が対向する基板表面に付着して膜が形成されるという原理を用いたものである。
しかし、この場合、ブラスト材の残留による製品への汚染の問題、残留ブラスト材上に堆積した付着粒子の剥離の問題、さらには付着膜の選択的かつ不均一な成長による剥離の問題が新たに生じ、根本的解決にはならない。特に、コイルがタンタルのような硬質の材料では、ブラスト処理する程度では、凹凸を設けることすら困難であり、効果的な付着力の増強効果を得ることはできない。
このようなスパッタリング法による薄膜の形成において、スパッタリングが終了した後、使用済みのコイルからリデポ膜を効率よく除去し、コイルを再生できれば、大きくコストダウンを図ることができる。
コイルの再生が可能となれば、電子部品の品質と生産性を向上させ、半導体素子及びデバイスを、安定して提供できる技術を提供することが可能となる。
1)基板とスパッタリングターゲットとの間に配置するスパッタリング用タンタル製コイルの再生方法であって、使用済みのタンタル製コイルをコイル全面あるいは一部を切削加工により、リデポ膜又はエロージョン部の凹凸及びナーリング加工跡がなくなり、平滑な面が得られるまでの切削を行って、スパッタリング中に形成されたリデポ膜を除去し、その後、切削した箇所に、新たにナーリングをかけることを特徴とするスパッタリング用タンタル製コイルの再生方法、を提供する。この場合の平滑な面とは、Ra≦1.6μmと定義する。
2)切込み量0.4~0.8mm、送り0.05~0.2mm/rev、回転数20~80rpmという条件の切削加工により、リデポ膜又はエロージョン部の凹凸及びナーリング加工跡がなくなり、平滑な面が得られるまでの切削を行うことを特徴とする上記1)に記載のスパッタリング用タンタル製コイルの再生方法
3)タンタル製コイルが新たにナーリング加工した凹凸を備えることを特徴とする上記1~2のいずれか一項に記載のスパッタリング用タンタル製コイルの再生方法
4)新たなナーリング加工の粗さがRa≧15μmであることを特徴とする上記1~3のいずれか一項に記載のスパッタリング用タンタル製コイルの再生方法
5)新たにナーリング加工したナーリング加工後のコイル厚みのばらつき(最大厚みと最小厚みの差)が0.5mm以下であることを特徴とする上記1~4のいずれか一項に記載のスパッタリング用タンタル製コイルの再生方法
6)リデポ膜の厚さにより、切削量を調節することを特徴とする上記1~5のいずれか一項記載のスパッタリング用タンタル製コイルの再生方法
7)上記1~6のいずれか一項に記載のスパッタリング用タンタル製コイルの再生方法により得られたスパッタリング用タンタル製コイル、を提供する。
再生に際しては、使用済みのタンタル製コイルの全面あるいは一部を切削加工により、一面引きして、スパッタリング中に形成されたリデポ膜を除去する。この場合の一面引きは、リデポ膜又はエロージョン部の凹凸及びナーリング加工跡がなくなるまで、すなわち平滑な面が得られるまでの切削を意味する。
切込み量0.4~0.8mm、送り0.05~0.2mm/rev、回転数20~80rpmとする。
コイル全域がエロージョンされているTaコイルについて、内面と上下エッジ部、外面を切込み量0.6mm、送り0.1mm/rev、回転数25~63rpmという条件の切削加工により一面引きを行った。すなわち、エロージョン部及びナーリング加工跡がなくなり、平滑になるまでの切削を行った。次に、この切削した部分に、新たに再ナーリング加工を行った。
ナーリングの表面粗さはRa=18.5μmとなり、コイル厚みのばらつき(最大厚みと最小厚みの差)は0.25mmであった。この結果、新品同様のコイルが得られた。
コイルの一部にリデポ膜が付着し、半分がエロージョンを受けているコイルについて、内面と上下エッジ部、外面を切込み量0.8mm、送り0.2mm/rev、回転数20~50rpmという条件の切削加工により一面引きを行った。すなわち、リデポ膜及びナーリング加工跡がなくなり、平滑になるまでの切削を行った。次に、この切削した部分に、新たに再ナーリング加工を行った。
ナーリングの表面粗さはRa=17.6μmであり、コイル厚みのばらつき(最大厚みと最小厚みの差)は0.31mmであった。この結果、新品同様のコイルが得られた。
コイル全域がエロージョンされているTaコイルについて、内面と上下エッジ部、外面を切込み量1.0mm、送り0.2mm/rev、回転数65~80rpmという条件の切削加工により一面引きを行った。すなわち、リデポ膜及びナーリング加工跡がなくなるまでの切削を行った。表面粗さはRa=2.5μmであり、平滑な面は得られなかった。そして、その箇所に、新たに再ナーリング加工を行った。
ナーリングの表面粗さはRa=17.8μmであったが、切削加工の制御が十分でなかったために、コイル厚みのばらつき(最大厚みと最小厚みの差)は、0.51mmとなり、適切なコイルを得ることができなかった。
コイル全域がエロージョンされているTaコイルについて、内面と上下エッジ部、外面を切込み量0.6mm、送り0.3mm/rev、回転数25~60rpmという条件の切削加工により一面引きを行った。すなわち、リデポ膜及びナーリング加工跡がなくなるまでの切削を行った。表面粗さはRa=2.1μmであり平滑な面は得られなかった。そして、その箇所に、新たに再ナーリング加工を行った。
ナーリングの表面粗さはRa=18.3μmであったが、切削加工の制御が十分でなかったために、コイル厚みのばらつき(最大厚みと最小厚みの差)は、6.3mmとなり、適切なコイルを得ることができなかった。
Claims (7)
- 基板とスパッタリングターゲットとの間に配置するスパッタリング用タンタル製コイルの再生方法であって、使用済みのタンタル製コイルを、コイル全面あるいは一部を切削加工により、リデポ膜又はエロージョン部の凹凸及びナーリング加工跡がなくなり、平滑な面が得られるまでの切削を行って、スパッタリング中に形成されたリデポ膜を除去し、その後、切削した箇所に、新たにナーリングをかけることを特徴とするスパッタリング用タンタル製コイルの再生方法。
- 切込み量0.4~0.8mm、送り0.05~0.2mm/rev、回転数20~80rpmという条件の切削加工により、リデポ膜又はエロージョン部の凹凸及びナーリング加工跡がなくなり、平滑な面が得られるまでの切削を行うことを特徴とする請求項1に記載のスパッタリング用タンタル製コイルの再生方法
- タンタル製コイルが新たにナーリング加工した凹凸を備えることを特徴とする請求項1~2のいずれか一項に記載のスパッタリング用タンタル製コイルの再生方法。
- 新たにナーリング加工したナーリング加工後の粗さがRa≧15μmであることを特徴とする請求項1~3のいずれか一項に記載のスパッタリング用タンタル製コイルの再生方法。
- 新たにナーリング加工したナーリング加工後のコイル厚みのばらつき(最大厚みと最小厚みの差)が0.5mm以下であることを特徴とする請求項1~4のいずれか一項に記載のスパッタリング用タンタル製コイルの再生方法。
- リデポ膜の厚さにより、切削量を調節することを特徴とする請求項1~5のいずれか一項記載のスパッタリング用タンタル製コイルの再生方法。
- 請求項1~6のいずれか一項に記載のスパッタリング用タンタル製コイルの再生方法により得られたスパッタリング用タンタル製コイル。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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KR1020167013884A KR20160067188A (ko) | 2011-09-30 | 2012-09-14 | 스퍼터링용 탄탈제 코일의 재생 방법 및 그 재생 방법에 의해서 얻어진 탄탈제 코일 |
KR1020137034112A KR20140071969A (ko) | 2011-09-30 | 2012-09-14 | 스퍼터링용 탄탈제 코일의 재생 방법 및 그 재생 방법에 의해서 얻어진 탄탈제 코일 |
JP2012554904A JP5280589B1 (ja) | 2011-09-30 | 2012-09-14 | スパッタリング用タンタル製コイルの再生方法及び該再生方法によって得られたタンタル製コイル |
CN201280040678.1A CN103748258A (zh) | 2011-09-30 | 2012-09-14 | 溅射用钽制线圈的再生方法及通过该再生方法得到的钽制线圈 |
US14/234,699 US9536715B2 (en) | 2011-09-30 | 2012-09-14 | Recycling method for tantalum coil for sputtering and tantalum coil obtained by the recycling method |
EP12835348.9A EP2719793B1 (en) | 2011-09-30 | 2012-09-14 | Regeneration method for tantalum coil for sputtering |
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CN107541706A (zh) * | 2016-06-29 | 2018-01-05 | 宁波江丰电子材料股份有限公司 | 滚花轮和滚花方法 |
US10662520B2 (en) | 2017-03-29 | 2020-05-26 | Applied Materials, Inc. | Method for recycling substrate process components |
US11183373B2 (en) | 2017-10-11 | 2021-11-23 | Honeywell International Inc. | Multi-patterned sputter traps and methods of making |
CN112958997A (zh) * | 2021-02-18 | 2021-06-15 | 宁波江丰电子材料股份有限公司 | 一种80tpi钽环件修复再利用的方法 |
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JP5280589B1 (ja) | 2013-09-04 |
TWI602938B (zh) | 2017-10-21 |
EP2719793B1 (en) | 2017-11-08 |
US9536715B2 (en) | 2017-01-03 |
US20140174917A1 (en) | 2014-06-26 |
EP2719793A4 (en) | 2014-11-19 |
TW201315829A (zh) | 2013-04-16 |
CN103748258A (zh) | 2014-04-23 |
KR20140071969A (ko) | 2014-06-12 |
JPWO2013047232A1 (ja) | 2015-03-26 |
KR20160067188A (ko) | 2016-06-13 |
EP2719793A1 (en) | 2014-04-16 |
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