WO2011129089A1 - スパッタリングターゲットの製造方法およびスパッタリングターゲット - Google Patents
スパッタリングターゲットの製造方法およびスパッタリングターゲット Download PDFInfo
- Publication number
- WO2011129089A1 WO2011129089A1 PCT/JP2011/002120 JP2011002120W WO2011129089A1 WO 2011129089 A1 WO2011129089 A1 WO 2011129089A1 JP 2011002120 W JP2011002120 W JP 2011002120W WO 2011129089 A1 WO2011129089 A1 WO 2011129089A1
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- WIPO (PCT)
- Prior art keywords
- metal plate
- sputtering target
- target
- hardness
- manufacturing
- Prior art date
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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
- C23C14/3407—Cathode assembly for sputtering apparatus, e.g. Target
- C23C14/3414—Metallurgical or chemical aspects of target preparation, e.g. casting, powder metallurgy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/14—Spinning
- B21D22/16—Spinning over shaping mandrels or formers
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
Definitions
- the present invention relates to a sputtering target manufacturing method in which a target portion and a backing plate portion are integrally formed, and a sputtering target.
- a sputtering target for forming a thin film has been formed of a flat metal plate having a circular or rectangular shape, and is incorporated into a sputtering apparatus in a state of being integrally bonded to a backing plate.
- the backing plate is a metal member for connecting the sputtering target to the sputtering cathode, and has a cooling water circulation channel formed therein.
- Brazing, electron beam welding, or the like is employed for joining the sputtering target and the backing plate.
- joining by brazing may cause the target and backing plate to peel off due to the temperature rise of the target during sputtering, while joining by electron beam welding creates a pinhole in the backing plate. There is a possibility to make it.
- Patent Document 1 describes a method of manufacturing a sputtering target having a target portion and a support portion that supports the target portion by deep drawing a single plate (blank) made of a metal or an alloy. Has been.
- a sputtering target is required to have a uniform and normal recrystallized structure for sputtering film formation.
- the backing plate is required to have enough strength to withstand the cooling water pressure.
- blanks controlled by the crystal characteristics of the target portion are produced, and the support portion is formed by pressing the peripheral edge of the blank. As a result, plastic working can be performed only on the support portion, and thus the crystal characteristics of the target portion can be maintained well.
- JP-A-6-158297 paragraphs [0016] and [0023], FIG. 1)
- an object of the present invention is to provide a sputtering target having both crystal characteristics required as a target and mechanical strength required as a backing plate, and a method for producing the same.
- a method for producing a sputtering target includes a step of forming a disk-shaped metal plate whose structure is controlled.
- An annular support portion is formed on the peripheral portion of the metal plate by drawing and deforming the peripheral portion of the metal plate by spinning while maintaining the metal plate at a predetermined temperature or lower.
- a sputtering target includes a disk-shaped target portion and an annular support portion.
- the target portion is formed of a metal material whose structure is controlled and has a first hardness.
- the support portion has a second hardness that is 1.2 times or more of the first hardness, and is formed by spinning the periphery of the target portion.
- the manufacturing method of the sputtering target which concerns on one Embodiment of this invention includes the process of forming the disk-shaped metal plate by which structure
- An annular support portion is formed on the peripheral portion of the metal plate by drawing and deforming the peripheral portion of the metal plate by spinning while maintaining the metal plate at a predetermined temperature or lower.
- the disc-shaped metal plate whose structure is controlled means a metal plate whose metal structure, crystal structure, crystal orientation, and the like required as a sputtering target are controlled.
- the metal plate forms a target portion that receives a sputtering action during film formation.
- the said support part is integrally formed in the peripheral part of a metal plate, and functions as a backing plate into which cooling water is introduced.
- the peripheral portion of the metal plate is spun while maintaining the metal plate at a predetermined temperature or lower when the support portion is formed.
- the predetermined temperature is set to an appropriate temperature at which relaxation of internal stress due to the annealing effect can be suppressed, for example.
- the sputtering target manufacturing method it is possible to form a support portion having a hardness of 1.2 times or more with respect to the hardness of the target portion. Thereby, it is possible to obtain a sputtering target having both crystal characteristics required as a target and mechanical strength required as a backing plate.
- the predetermined temperature can be appropriately set depending on the type and composition of the metal material constituting the metal plate.
- the predetermined temperature can be 130 ° C. By spinning the metal plate at 130 ° C. or lower, it is possible to stably form a support portion having a desired hardness or mechanical strength.
- the method of processing the metal plate while controlling the temperature is not particularly limited.
- the peripheral portion of the metal plate is drawn and deformed by spinning, the metal plate is cooled, and the peripheral portion of the metal plate is further The drawing is deformed by spinning. In this way, by alternately performing the processing and cooling, the support portion can be deformed into a desired shape while suppressing a temperature rise associated with the processing.
- the cooling of the metal plate may be performed by directly cooling the metal plate or indirectly cooling the metal plate by cooling a mold that holds the metal plate.
- the target portion is formed of a metal material whose structure is controlled and has a first hardness.
- the support portion has a second hardness that is 1.2 times or more of the first hardness, and is formed by spinning the periphery of the target portion.
- the above sputtering target can satisfy the crystal characteristics required as a target and the mechanical strength of a support required as a backing plate.
- the sputtering target 10 of this embodiment is formed in a substantially shallow dish shape as a whole, and has a target portion 11 and a support portion 12.
- the target portion 11 and the support portion 12 are made of the same metal material, and are integrally formed by drawing and deforming a metal plate.
- the target part 11 has a disk shape and is formed of a metal material whose structure is controlled.
- the target portion 11 is made of aluminum or an aluminum alloy.
- the target portion 11 is made of an aluminum copper alloy (Al-0.5% Cu).
- the metal material which forms the target part 11 is not restricted to said example, The other metal or alloy material used as a sputtering target may be used.
- the target unit 11 is controlled in advance to a crystal structure and crystal orientation required as a sputtering target.
- the crystal structure is typically a fine and uniform recrystallized structure, but is controlled to an optimum structure state according to the required target quality.
- the metal plate whose structure is controlled in this way is manufactured through predetermined plastic processing such as forging and rolling and predetermined heat treatment.
- the diameter of the target unit 11 is set to an appropriate size according to the specification.
- the target portion 11 is formed with a diameter of 300 mm to 700 mm, but of course not limited thereto.
- the thickness of the target portion 11 is not particularly limited, and can be set as appropriate as long as it can withstand the pressure of cooling water introduced during sputtering and does not hinder the formation of the support portion 12 and the like.
- the target portion 11 is formed with a thickness of 20 mm to 50 mm.
- the support part 12 is formed in an annular shape along the periphery of the target part 11.
- the support portion 12 is formed by spinning the periphery of the target portion 11 as will be described later. Therefore, the support portion 12 is subjected to plastic working and has increased in hardness due to work hardening, and the hardness is higher than the hardness of the target portion 11.
- the support part 12 has a hardness of 1.2 times or more of the hardness of the target part 11 by receiving a spinning process in a temperature-controlled state as will be described later.
- the support part 12 has a function as a backing plate for connecting the target part 11 to a cathode of a sputtering apparatus (not shown).
- a space portion 13 having a predetermined volume is formed by the support portion 12.
- the introduction of the cooling water into the space portion 13 suppresses an excessive temperature rise of the target portion 11 during sputtering.
- a flange portion 12 a is formed at the tip of the support portion 12 in order to improve the detachment workability of the sputtering target 10.
- Mounting holes such as bolts are appropriately formed in the flange portion 12a.
- an annular groove in which the seal ring is mounted may be formed on the bottom surface side of the flange portion 12a. The formation of the flange portion 12a is not essential and may be omitted.
- the support portion 12 has a truncated cone shape whose diameter gradually increases from the target portion 11 side, but the shape is not particularly limited, and may be, for example, a cylindrical shape. Moreover, the height of the support part 12 is not specifically limited, It sets suitably according to a specification.
- a disk-shaped metal ingot having a diameter of 200 mm and a thickness of 150 mm is produced.
- the ingot is hot-forged at a temperature of 280 ° C. to 300 ° C. to produce a disk-shaped ingot having a diameter of 190 mm and a thickness of 150 mm.
- the ingot is water-quenched, annealed at 280 ° C. to 300 ° C., and further cold forged to produce a disk-shaped ingot having a diameter of 450 mm and a thickness of 25 mm.
- re-anneal at 280-300 ° C.
- the metal plate 100 whose structure is controlled to a predetermined target characteristic as described above is drawn and deformed by the spinning device 20 shown in FIG.
- the spinning device 20 includes a mold 21 and a motor 24 that rotates the mold 21.
- the metal plate 100 is mounted on the spinning device 20 by being sandwiched between the mold 21 and the holder 22.
- a drive shaft 23 of a motor 24 is coupled to the center of the mold 21, and the mold 21, the metal plate 100, and the holder 22 are integrally rotated by driving the motor 24.
- the mold 21 is arbitrarily determined according to the shape of the sputtering target 10 to be produced.
- the holder 22 presses the central region 101 of the metal plate 100 against the mold 21.
- a central region 101 of the metal plate 100 sandwiched between the mold 21 and the holder 22 forms the target portion 11 of the sputtering target 10.
- the peripheral region 102 of the metal plate 100 located outside the holder 22 is pressed toward the side peripheral surface of the mold 21 by the squeezing roller 30. Thereby, the peripheral area
- peripheral region 102 of the metal plate 100 In the peripheral region 102 of the metal plate 100, internal stress (internal strain) accumulates and hardens due to drawing deformation. That is, the peripheral region 102 of the metal plate 100 is increased in strength by work hardening and has a higher hardness than the central region 101 of the metal plate 100.
- the temperature of the peripheral region 102 of the metal plate 100 rises by converting the processing energy into heat energy.
- the heat generation of the metal plate 100 promotes rearrangement of the crystal structure of the peripheral region 102 and promotes relaxation of internal stress. That is, due to the annealing effect due to heat generation of the metal plate 100, an increase in hardness due to work hardening of the peripheral region 102 is suppressed.
- the temperature of the metal plate 100 is controlled during the spinning process of the metal plate 100, and the cooling process of the metal plate 100 is performed so that the temperature does not reach a predetermined temperature or higher. To do. Thereby, the excessive temperature rise of the peripheral area
- the predetermined temperature can be appropriately set depending on the type and composition of the metal material constituting the metal plate.
- the predetermined temperature can be 130 ° C.
- the temperature management of the metal plate 100 may directly manage the temperature of the metal plate 100 or may manage the temperature of the mold 21. Further, the temperature management of the metal plate 100 may be performed not only by temperature management by temperature measurement but also by, for example, the processing time and the processing rate.
- the cooling method of the metal plate 100 can employ natural cooling of the metal plate 100 or forced cooling such as water cooling or air cooling. Further, the metal plate 100 may be indirectly cooled by cooling the mold 21. In order to maintain the metal plate 100 at a predetermined temperature or less, the drawing of the metal plate 100 may be performed intermittently at appropriate intervals (for example, 10 to 40 minutes), or the metal plate 100 may be cooled. However, continuous processing may be used. Since the heating rate during processing varies depending on the processing speed, the processing rate of the metal plate 100, and the like, the cooling method of the metal plate 100 may be changed according to the progress of processing.
- the drawing process of the metal plate 100 is continued until the peripheral region 102 contacts the side peripheral surface of the mold 21. Thereby, the annular support part 12 surrounding the periphery of the target part 11 is formed.
- the flange portion 12 a of the support portion 12 is formed by pressing the peripheral edge of the metal plate 100 against the flange portion 21 a of the mold 21.
- the sputtering target 10 is manufactured as described above.
- the support portion 12 can be formed without slowing the curing rate.
- the support part 12 can be formed with the hardness of 1.2 times or more of the hardness (for example, Vickers hardness (Hv) 30) of the target part 11.
- Hv Vickers hardness
- the hardness ratio of the support part to the target part when the drawing process was continuously performed without temperature control was 1.1, as described above. It was confirmed that when the support portion was formed while managing the metal plate at 130 ° C. or less, the hardness ratio could be 1.3 or more. It has also been confirmed that a support portion having a hardness ratio of 1.4 could be formed by performing drawing while maintaining a relatively long interval (for example, 40 minutes).
- a spinning method is adopted for forming the support portion 12.
- the peripheral region 102 of the metal plate 100 can be uniformly squeezed over the entire region, and the entire region of the support portion 12 can be finished to a substantially uniform hardness. Therefore, the uniformity of hardness can be improved as compared with a processing method in which deformation stress acts on the bent portion intensively as in the press processing method.
- a highly reliable sputtering target can be manufactured.
- die can be reduced compared with the press processing method, the reduction of the manufacturing cost of the sputtering target 10 can be aimed at.
- the sputtering target 10 having both the target part 11 having desired crystal characteristics and the support part 12 having excellent mechanical strength.
- a large sputtering target can be stably manufactured.
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Abstract
Description
上記金属板を所定温度以下に維持しながら上記金属板の周縁部をスピニング加工によって絞り変形させることで、上記金属板の周縁部に環状の支持部が形成される。
上記ターゲット部は、組織制御された金属材料で形成され、第1の硬度を有する。
上記支持部は、上記第1の硬度の1.2倍以上である第2の硬度を有し、上記ターゲット部の周囲をスピニング加工することで形成される。
上記金属板を所定温度以下に維持しながら上記金属板の周縁部をスピニング加工によって絞り変形させることで、上記金属板の周縁部に環状の支持部が形成される。
上記ターゲット部は、組織制御された金属材料で形成され、第1の硬度を有する。
上記支持部は、上記第1の硬度の1.2倍以上である第2の硬度を有し、上記ターゲット部の周囲をスピニング加工することで形成される。
11…ターゲット部
12…支持部
20…スピニング加工装置
21…金型
100…金属板
Claims (6)
- 組織制御された円盤状の金属板を形成し、
前記金属板を所定温度以下に維持しながら前記金属板の周縁部をスピニング加工によって絞り変形させることで、前記金属板の周縁部に環状の支持部を形成する
スパッタリングターゲットの製造方法。 - 請求項1に記載のスパッタリングターゲットの製造方法であって、
前記所定温度は、130℃である
スパッタリングターゲットの製造方法。 - 請求項1に記載のスパッタリングターゲットの製造方法であって、
前記支持部を形成する工程は、
前記金属板の周縁部をスピニング加工によって絞り変形させる工程と
前記金属板を冷却する工程と、
前記金属板の周縁部を更にスピニング加工によって絞り変形させる工程とを有する
スパッタリングターゲットの製造方法。 - 請求項3に記載のスパッタリングターゲットの製造方法であって、
前記金属板を冷却する工程は、前記金属板を保持する金型を冷却する工程を含む
スパッタリングターゲットの製造方法。 - 組織制御された金属材料で形成され、第1の硬度を有する円板状のターゲット部と、
前記第1の硬度の1.2倍以上である第2の硬度を有し、前記ターゲット部の周囲をスピニング加工することで形成された環状の支持部と
を具備するスパッタリングターゲット。 - 請求項5に記載のスパッタリングターゲットであって、
前記金属材料は、アルミニウム又はアルミニウム合金である
スパッタリングターゲット。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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CN201180009351.3A CN102753722B (zh) | 2010-04-15 | 2011-04-11 | 溅射靶材的制造方法及溅射靶材 |
JP2012510562A JPWO2011129089A1 (ja) | 2010-04-15 | 2011-04-11 | スパッタリングターゲットの製造方法およびスパッタリングターゲット |
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JP2010-093732 | 2010-04-15 | ||
JP2010093732 | 2010-04-15 |
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WO2011129089A1 true WO2011129089A1 (ja) | 2011-10-20 |
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PCT/JP2011/002120 WO2011129089A1 (ja) | 2010-04-15 | 2011-04-11 | スパッタリングターゲットの製造方法およびスパッタリングターゲット |
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JP (1) | JPWO2011129089A1 (ja) |
CN (1) | CN102753722B (ja) |
TW (1) | TW201142060A (ja) |
WO (1) | WO2011129089A1 (ja) |
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CN113718211A (zh) * | 2021-08-25 | 2021-11-30 | 宁波江丰电子材料股份有限公司 | 一种半导体用碗状靶材及其制备方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05104160A (ja) * | 1991-10-07 | 1993-04-27 | Zeppelin Metallwerke Gmbh | 金属スピニング方法および装置 |
US5687600A (en) * | 1994-10-26 | 1997-11-18 | Johnson Matthey Electronics, Inc. | Metal sputtering target assembly |
JP2002161360A (ja) * | 2000-11-24 | 2002-06-04 | Nikko Materials Co Ltd | 底のある円筒状メタルターゲットの製造方法 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US20040016635A1 (en) * | 2002-07-19 | 2004-01-29 | Ford Robert B. | Monolithic sputtering target assembly |
JP5104160B2 (ja) * | 2007-09-26 | 2012-12-19 | Jfeエンジニアリング株式会社 | 包接水和物生成用の水溶液、蓄熱剤、包接水和物又はそのスラリーの製造方法、蓄放熱方法並びに潜熱蓄熱剤又はその主成分を生成するための水溶液の調製方法 |
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2011
- 2011-04-11 JP JP2012510562A patent/JPWO2011129089A1/ja active Pending
- 2011-04-11 CN CN201180009351.3A patent/CN102753722B/zh active Active
- 2011-04-11 WO PCT/JP2011/002120 patent/WO2011129089A1/ja active Application Filing
- 2011-04-13 TW TW100112885A patent/TW201142060A/zh unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05104160A (ja) * | 1991-10-07 | 1993-04-27 | Zeppelin Metallwerke Gmbh | 金属スピニング方法および装置 |
US5687600A (en) * | 1994-10-26 | 1997-11-18 | Johnson Matthey Electronics, Inc. | Metal sputtering target assembly |
JP2002161360A (ja) * | 2000-11-24 | 2002-06-04 | Nikko Materials Co Ltd | 底のある円筒状メタルターゲットの製造方法 |
Also Published As
Publication number | Publication date |
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JPWO2011129089A1 (ja) | 2013-07-11 |
CN102753722B (zh) | 2014-09-03 |
TW201142060A (en) | 2011-12-01 |
CN102753722A (zh) | 2012-10-24 |
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