WO2010035718A1 - 円筒形スパッタリングターゲット及びその製造方法 - Google Patents
円筒形スパッタリングターゲット及びその製造方法 Download PDFInfo
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- WO2010035718A1 WO2010035718A1 PCT/JP2009/066399 JP2009066399W WO2010035718A1 WO 2010035718 A1 WO2010035718 A1 WO 2010035718A1 JP 2009066399 W JP2009066399 W JP 2009066399W WO 2010035718 A1 WO2010035718 A1 WO 2010035718A1
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- cylindrical
- target
- sputtering
- outer peripheral
- peripheral surface
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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
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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
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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
- H01J37/3411—Constructional aspects of the reactor
- H01J37/3414—Targets
- H01J37/3423—Shape
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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
- H01J37/3411—Constructional aspects of the reactor
- H01J37/3435—Target holders (includes backing plates and endblocks)
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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
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
Definitions
- the present invention relates to a cylindrical sputtering target and a manufacturing method thereof.
- a cylindrical target having a length of more than 3 m is required.
- Such a long cylindrical sputtering target is used in a magnetron rotary cathode sputtering apparatus.
- the cylindrical sputtering target is usually formed by fixing a cylindrical target material on a long cylindrical base material, and a metal seamless tube is generally used as the cylindrical base material. Grinding the entire surface of a long cylindrical base material is not economical because of the cost, and there is a problem in processing accuracy. Therefore, only the portions at both ends of the cylindrical base material are ground for mounting on the sputtering device, and the portion to which the cylindrical target material is fixed remains the seamless tube, so it is not a perfect circle, but undulates. And warp.
- a long cylindrical sputtering target 10 or more small cylindrical target materials may be stacked, and displacement due to stacking may cause a step on the outer peripheral surface of the cylindrical target material.
- multi-split cylindrical sputtering targets made up of a plurality of cylindrical target materials are used in order to prevent the cylindrical target materials from thermally expanding due to the plasma being sputtered and causing the targets to collide and crack.
- a dividing part in which the materials are arranged at intervals is required. In particular, in such a divided portion, a step is likely to occur on the outer peripheral surface of the adjacent cylindrical target material.
- the outer peripheral surface of the cylindrical base material and the target material are used by using a spacer that is slightly thinner than the distance between the cylindrical base material and the cylindrical target material.
- a method of aligning the center on the inner peripheral surface see, for example, Patent Documents 2 and 3.
- the cylindrical target material cannot be inserted into the cylindrical base material, or the position of the cylindrical target material is restricted by the shape of the cylindrical base material, In some cases, a step is generated on the outer peripheral surface of the adjacent cylindrical target material.
- JP 2000-204468 A Japanese Patent Laid-Open No. 08-060351 JP 2005-281862 A
- An object of the present invention is to provide a cylindrical sputtering target having a high production yield in a film forming process even when sputter film formation is performed using a long cylindrical sputtering target made of a plurality of cylindrical target materials. .
- the present inventors suppress a step on the outer peripheral surface of adjacent cylindrical target materials in a cylindrical sputtering target composed of a plurality of cylindrical target materials.
- the inventors have found that abnormal discharge and generation of particles during sputtering film formation can be suppressed, and the present invention has been completed.
- the present invention is formed by joining a plurality of stacked cylindrical target materials to the outer peripheral surface of a cylindrical base material using a joining material, and adjacent cylindrical target materials are spaced apart.
- a cylindrical sputtering target having a divided portion arranged and having a step of 0.5 mm or less on an outer peripheral surface of a cylindrical target material adjacent in the divided portion.
- the present invention manufactures a cylindrical sputtering target by bonding a plurality of stacked cylindrical target materials to the outer peripheral surface of the cylindrical base material using a bonding material, and uses the cylindrical base material as a reference.
- the other cylinder When arranging a plurality of cylindrical target materials, the other cylinder based on the outer peripheral surface of one cylindrical target material so that the step between the outer peripheral surfaces of adjacent cylindrical target materials is 0.5 mm or less.
- a method of manufacturing a cylindrical sputtering target, comprising fixing a shaped target material.
- various materials generally used in sputtering can be used, for example, metals such as In, Sn, Zn, Al, Nb, Ti, or Examples thereof include alloys containing these metals, or one or more oxides or nitrides of these metals.
- the oxide include ITO (Indium Tin Oxide), AZO (Aluminum Zinc Oxide), IZO (Indium Zinc Oxide), SnO 2 , In 2 O 3 , Al 2 O 3 , TiO 2 , and ZnO. In the case of such a brittle ceramic material, the effect of the present invention can be obtained.
- Various materials can be used as the cylindrical substrate 1 used in the cylindrical sputtering target of the present invention.
- this material when performing sputtering using a target, heat conduction is performed so that the bonding material for bonding the cylindrical base material 1 and the cylindrical target material 2 can be sufficiently cooled so as not to deteriorate or melt. It is sufficient if it has electrical conductivity such that it can be discharged from the target material 2 at the time of sputtering and has a strength capable of supporting the target. Examples of such materials include Cu, Ti, Al, Mo, alloys containing these metals, and SUS.
- the length of the cylindrical base material 1 is not particularly limited. In this embodiment, even with a cylindrical sputtering target using a cylindrical substrate having a length of 1000 mm or more, film formation can be performed with high yield.
- the bonding material As a bonding material used for the cylindrical sputtering target of the present embodiment, when sputtering is performed using the target, the bonding material has sufficient heat conductivity so that the bonding material can be sufficiently cooled so as not to deteriorate or melt. Any material may be used as long as it has electrical conductivity that enables discharge from the target material 2 at the time of sputtering and has a strength that can support the target. For example, a solder material or a conductive resin can be used.
- solder material any material generally used as a solder material can be used.
- it is a low melting point solder, for example, In, In alloy, Sn, Sn alloy etc. are mentioned. More preferred is In or In alloy solder.
- In or In alloy solders have a good track record with flat-type targets, and because they have a high degree of spreadability, distortion such as thermal expansion between the target material 2 heated during sputtering and the base material 1 being cooled. It also has the effect of relaxing.
- the conductive resin examples include a mixture of a thermosetting resin such as epoxy, acrylic, polyester, urethane, and phenol and a conductive material such as Ag, C, or Cu as a filler.
- the cylindrical sputtering target of this embodiment has a divided portion in which a plurality of cylindrical target materials 2 are joined to a cylindrical base material 1 and adjacent cylindrical target materials 2 are arranged at intervals. And the level
- segmentation part is 0.5 mm or less. This step is preferably 0.3 mm or less, more preferably 0.2 mm or less.
- segmentation part is a "deviation" part which the arrow of FIG. 3 shows, and is the largest value in the cylindrical sputtering target. Say. That is, in this embodiment, it means that the deviation is 0.5 mm or less in all the divided parts.
- the cylindrical sputtering target of the present embodiment has a divided portion in which adjacent cylindrical target materials 2 are arranged at intervals, so that thermal expansion of the cylindrical target material 2 due to plasma during sputtering. Thus, it is possible to prevent the target materials 2 from colliding and breaking. However, if there is a distribution in the interval between the divided portions, a positional shift of the cylindrical target material 2 is caused, which causes a step on the outer peripheral surface of the cylindrical target material 2. Therefore, the distribution of the interval between the divided portions is preferably ⁇ 0.1 mm or less, and more preferably ⁇ 0.05 mm or less.
- the distribution of the intervals between the divided portions in this embodiment is a difference between the maximum value and the minimum value with respect to the average value when eight or more intervals are measured evenly in the circumferential direction in the divided portions. If there is a part, it means the maximum value.
- the interval between the divided portions is not 0, and an optimal value can be designed appropriately from the length of the cylindrical target material 2 and the thermal expansion coefficient. However, if the interval is narrow, the thermal expansion of the cylindrical target material 2 due to plasma during sputtering causes The target materials may collide and break. Therefore, it is preferable that the interval between the portions where the adjacent target materials 2 are closest to each other is 0.1 mm or more. Further, when the interval between the divided portions is large, the bonding material may be sputtered. Therefore, it is preferable that the interval between the divided portions is determined to a value at which the bonding material of the divided portions is not sputtered in consideration of the mean free path of the sputtering gas used and the usage efficiency of the target. As described above, when the average value of the interval between the divided portions is obtained, the average value in any divided portion is preferably 0.5 mm or less, and more preferably 0.4 mm or less.
- the cylindrical target material 2 used in the present embodiment preferably chamfers the edge portion of the outer peripheral surface of the adjacent cylindrical target material 2.
- the size (width or depth) of the chamfer is preferably 2 mm or less, more preferably 1 mm or less from the influence on the film thickness distribution.
- the shape of the chamfer is not particularly limited as long as the concentration of the electric field at the time of sputtering film formation can be reduced, and may be a C surface, an R surface, or a step shape.
- a method of filling the bonding material in the gap between the cylindrical base material 1 and the plurality of cylindrical target materials 2 and bonding them can be exemplified.
- the cylindrical target material 2 is arranged on the basis of the cylindrical substrate 1.
- a plurality of cylindrical target materials 2 are stacked in advance on the outside of the cylindrical substrate 1.
- the lower part of the gap between the cylindrical base material 1 and the cylindrical target material 2 is sealed to form a space for filling the bonding material.
- alignment with the cylindrical base material 1 is performed on the basis of the outer peripheral surface of the cylindrical target material 2.
- Such a cylindrical sputtering target is preferably assembled using a jig.
- the material of the jig used at this time is not particularly limited as long as it is a material that can withstand heating during solder filling. Examples thereof include metals such as aluminum and geralumin.
- the cylindrical base material 1 was placed by being fitted into a recess provided in the base material holder 6a, and was fixed by a sealing jig 4 through a silicon O-ring. Both end portions of the cylindrical base material 1 become vacuum seal portions using an O-ring or the like for mounting to a sputtering apparatus, and the outer peripheral surface and / or the inner peripheral surface thereof are precisely ground, so this portion Is preferably a reference plane for positioning. Further, by placing a block 8 having an arbitrary size under the sealing jig 4, the cylindrical target material 2 can be arranged at an arbitrary distance from the end surface of the cylindrical base material 1.
- the cylindrical target material 2 is stacked and arranged on the sealing jig 4 on the outer peripheral surface of the cylindrical base material 1 to form a space 3 filled with the bonding material.
- the cylindrical target material 2 is preferably concentric with the cylindrical base material 1.
- the space between the cylindrical target material 2 and the substrate pressing member 6b is sealed with a sealing material 5.
- the bonding material is a low melting point solder or conductive resin, heat treatment is performed.
- the sealing material 5 in which case Teflon (registered trademark), silicon, or the like is used.
- Teflon registered trademark
- the material is usable.
- the sealing material 5 between the plurality of cylindrical target materials 2 a predetermined interval can be formed in the divided portions, and the distribution can be made extremely small.
- the thickness of the sealing material 5 to be inserted is a predetermined thickness corresponding to the desired design value of the interval.
- the base material holder 6 b was placed on the uppermost target material 2 via the seal material 5, and the upper and lower base material holders 6 a and 6 b were connected by the connecting shaft 9. Then, the cylindrical target material 2 has a spring (not shown) and a screw (not shown) so that, for example, the outer peripheral surface is aligned and the displacement at the divided portion is suppressed as much as possible with the outer peripheral surface as a reference.
- the target presser 7 is fixed and the target presser 7 is fixed to the connecting shaft 9.
- the target holder 7 can be adjusted to an arbitrary position with respect to the substrate holders 6a and 6b, and as shown in the drawing, the structure may be such that the outer peripheral surface of the target material 2 to be joined is held by a single rod-like body, Moreover, the structure which hold
- at least two target holders 7 are necessary, preferably three, more preferably four as shown in FIG. Or, even numbered lines more than that are arranged evenly at positions facing each other. By doing in this way, it becomes possible to suppress the level
- the entire cylindrical sputtering target assembled as shown in FIG. 1 is heated to a temperature equal to or higher than the melting point of the solder, and the molten solder is poured into the space 3 from the upper part of the substrate holder 6b. Fill. After completion of the filling, the cylindrical base material 1 and the cylindrical target material 2 are joined by cooling and solidifying the solder. At this time, if the temperature is too high, the solder may be oxidized and the adhesive strength may be lowered. Therefore, the heating temperature is preferably in the range of the melting point of the solder to the melting point of the solder + 100 ° C., more preferably the melting point of the solder.
- the bonding material is a conductive resin
- the space 3 of the cylindrical sputtering target assembled as shown in FIG. 1 is filled with the conductive resin and subjected to a curing process such as heating in accordance with the curing conditions of the resin.
- the target material 2 and the cylindrical base material 1 are joined.
- the joint surface of the cylindrical base material 1 and the cylindrical target material 2 is subjected to a process of wetting the joining surfaces in advance.
- any treatment that improves the wettability of the bonding material may be used, and examples thereof include UV irradiation, Ni plating, vapor deposition, and surface treatment by ultrasonic soldering.
- a desired cylindrical sputtering target can be obtained by removing a jig or an extra bonding material.
- the sealing material 5 between the adjacent cylindrical target materials 2 is heated after joining the cylindrical base material 1 and the cylindrical target material 2 to heat the cylindrical base material 1 and the cylindrical target material 2. It can be easily removed using the differential expansion.
- the interval distribution and the average value of the intervals in the divided portions are obtained by measuring the intervals at eight locations as described above.
- Example 1 Twelve ITO cylindrical target materials (outer diameter: 150 mm ⁇ , inner diameter: 133 mm ⁇ , length: 260 mm) are prepared, and the joint surface of the cylindrical target material is masked with heat-resistant tape, and the soldering surface is coated with an ultrasonic soldering iron. Then, In solder was primed. On the other hand, one SUS cylindrical substrate (outer diameter: 130 mm ⁇ , inner diameter: 120 mm ⁇ , length 3200 mm) is prepared and masked with heat-resistant tape to prevent the bonding material from adhering to surfaces other than the bonding surface. Then, In solder was primed on the bonding surface with an ultrasonic soldering iron.
- the cylindrical base material 1 and the 12 cylindrical target materials 2 that have been subjected to the above-described treatment, a duralumin sealing jig 4, base material pressers 6a and 6b, a target presser 7, and a block 8 were assembled as shown in FIG.
- the cylindrical substrate 1 was placed on the substrate holder 6a and fixed by the sealing jig 4 through a silicon O-ring.
- the base material holder 6 b was placed on the cylindrical target material 2 via the sealing material 5.
- the upper and lower substrate holders 6 a and 6 b were connected by the connecting shaft 9 to fix the cylindrical target material 2.
- the alignment and fixing of the cylindrical target material 2 were performed using four target pressers 7.
- an annular Teflon (registered trademark) sheet is used between the adjacent cylindrical target materials 2 and between the cylindrical target material 2 and the sealing jig 4.
- a silicon O-ring was used between the fixing jigs 4.
- the entire assembled cylindrical sputtering target was heated to 180 ° C., and molten In solder (melting point 156 ° C.) was poured into the space 3 from above. After completion of the pouring of the In solder, it is cooled to 120 ° C, and after confirming that the In solder is completely solidified, it is heated again to 130 ° C and a Teflon (registered trademark) sheet between the adjacent cylindrical target materials 2 is attached. It cut and removed, and the division part which has a space
- molten In solder melting point 156 ° C.
- the step of the outer peripheral surface in the divided part of the obtained cylindrical sputtering target was 0.2 mm, and the distribution of the distance between the divided parts was ⁇ 0.05 mm.
- the average value of the interval in each divided portion was 0.29 to 0.36 mm.
- Example 1 A cylindrical base material 1 and a cylindrical target material 2 were prepared in the same manner as in Example 1. As shown in FIG. 4, eight copper wires (0. 7 mm ⁇ ) were arranged at equal intervals. Next, as shown in the assembly diagram of FIG. 5, 12 cylindrical target materials 2 were used and the cylindrical target material 2 was fitted and inserted into the cylindrical base material 1. Was unable to move and was not assembled as a cylindrical sputtering target.
- Comparative Example 2 Except that the diameter of the copper wire that is the spacer 10 of Comparative Example 1 is 0.6 mm ⁇ , the same method as in Comparative Example 1 is used as shown in FIG. 5 except that 12 cylindrical target materials are used and a cylindrical sputtering target is used. Assembled. Thereafter, similarly to Example 1, the cylindrical base material 1 and the cylindrical target material 2 were joined with In solder to produce a cylindrical target material. The step of the outer peripheral surface in the divided part of the obtained cylindrical sputtering target was 0.8 mm, and the distribution of the distance between the divided parts was ⁇ 0.13 mm. In addition, the average value of the intervals in each divided portion was 0.30 to 0.39 mm.
- Example 2 Two ITO cylindrical target materials (outer diameter: 93.0 mm ⁇ , inner diameter: 78.5 mm ⁇ , length: 175 mm) are prepared, and other than the joining surface of the cylindrical target material is masked with heat-resistant tape, and the joining surface is super In solder was primed with a sonic soldering iron.
- one SUS cylindrical base material (outer diameter: 75.5 mm ⁇ , inner diameter: 70 mm ⁇ , length 490 mm) is prepared, and heat resistant tape is used to prevent the bonding material from adhering to surfaces other than the bonding surface. Then, the soldering surface was coated with In solder with an ultrasonic soldering iron.
- Example 1 Thereafter, in the same manner as in Example 1, except that two cylindrical target materials were used, a target I having a divided portion shown in Table 1 was produced. Further, in the same manner as in Example 1, except that two cylindrical target materials were used, targets II to IV having divided portions shown in Table 1 were produced.
- Comparative Example 3 Except for not using a copper wire, the same method as in Comparative Example 2, except that two ITO cylindrical target materials (outer diameter: 93.0 mm ⁇ , inner diameter: 78.5 mm ⁇ , length: 175 mm) and SUS Using one cylindrical substrate (outer diameter: 75.5 mm ⁇ , inner diameter: 70 mm ⁇ , length 490 mm), targets V to VII having the divided portions shown in Table 1 were produced.
- the thus produced cylindrical sputtering target was subjected to 20 kWh sputtering under the following sputtering conditions, and the number of occurrences of abnormal discharge (arc) was measured.
- the measurement of the number of occurrences of arc is divided into a small arc (2 ⁇ sec or more and less than 20 ⁇ sec) and a large arc (20 ⁇ sec or more) using a micro arc monitor (manufactured by Landmark Technology Co., Ltd.) on the basis of the discharge voltage drop time.
- the measurement was performed under the following measurement conditions.
- the obtained discharge results are shown in Table 1.
- the present invention uses a cylindrical sputtering target and a method for manufacturing the same, and even when sputter film formation is performed using a long cylindrical sputtering target made of a plurality of cylindrical target materials, the production yield of the film forming process can be improved.
- a high cylindrical sputtering target can be provided.
Abstract
Description
ITO円筒形ターゲット材(外径:150mmφ、内径:133mmφ、長さ:260mm)を12個用意し、円筒形ターゲット材の接合面以外を耐熱性テープでマスキングし、接合面に超音波半田鏝にてIn半田を下塗した。一方、SUS製円筒形基材(外径:130mmφ、内径:120mmφ、長さ3200mm)を1個用意し、接合面以外の面を接合材が付着するのを防止するために耐熱性テープでマスキングし、接合面に超音波半田鏝にてIn半田を下塗した。
実施例1と同様に円筒形基材1と円筒形ターゲット材2を準備し、図4に示すように、円筒形基材1の外周面上に、スペーサー10として8本の銅ワイヤー(0.7mmφ)を等間隔に配置した。次に、図5の組立図になるように、但し円筒形ターゲット材2を12個用いて、円筒形ターゲット材2を円筒形基材1に嵌め込み挿入して行ったが、円筒形ターゲット材2が途中で動かなくなり、円筒形スパッタリングターゲットとして組立てられなかった。
比較例1のスペーサー10である銅ワイヤーの径を0.6mmφとした以外は比較例1と同様の方法で図5のように、但し円筒形ターゲット材を12個用いて、円筒形スパッタリングターゲットを組立てた。その後、実施例1と同様に、In半田で円筒形基材1と円筒形ターゲット材2を接合し、円筒形ターゲット材を製造した。得られた円筒形スパッタリングターゲットの分割部における外周面の段差は、0.8mmで、分割部の間隔の分布は±0.13mmであった。また各分割部における間隔の平均値は0.30~0.39mmであった。
ITO円筒形ターゲット材(外径:93.0mmφ、内径:78.5mmφ、長さ:175mm)を2個用意し、円筒形ターゲット材の接合面以外を耐熱性テープでマスキングし、接合面に超音波半田鏝にてIn半田を下塗した。一方、SUS製円筒形基材(外径:75.5mmφ、内径:70mmφ、長さ490mm)を1個用意し、接合面以外の面を接合材が付着するのを防止するために耐熱性テープでマスキングし、接合面に超音波半田鏝にてIn半田を下塗した。その後、実施例1と同様の方法にて、但し円筒形ターゲット材を2個用いて、表1に示す分割部を有するターゲットIを製造した。又、実施例1と同様の方法にて、但し円筒形ターゲット材を2個用いて、表1に示す分割部を有するターゲットII~IVを製造した。
銅ワイヤーを使用しなかった以外は比較例2と同様な方法で、但し、ITO円筒形ターゲット材(外径:93.0mmφ、内径:78.5mmφ、長さ:175mm)2個と、SUS製円筒形基材(外径:75.5mmφ、内径:70mmφ、長さ490mm)1個を用いて、表1に示す分割部を有するターゲットV~VIIを製造した。
こうして作製された円筒形スパッタリングターゲットを以下のスパッタリング条件で20kWhスパッタリングを行い、異常放電(アーク)の発生回数を測定した。アークの発生回数の測定は、マイクロアークモニター(ランドマークテクノロジ社製)を用いて、放電電圧の降下時間を基準に、小アーク(2μsec以上20μsec未満)と大アーク(20μsec以上)に分けて、以下の測定条件で行った。得られた放電結果を表1に示す。
DC電力 :15W/cm2(マグネット面積に対して)
ターゲット回転数 :6rpm
スパッタガス :Ar+O2
ガス圧 :0.5Pa
アーク測定条件
検出電圧 :300V
小アーク :2μsec以上20μsec未満
大アーク :20μsec以上
2 円筒形ターゲット材
3 空間
4 封止治具
5 シール材
6a、6b 基材押さえ
7 ターゲット押さえ
8 ブロック
9 連結軸
10 スペーサー
Claims (8)
- 円筒形基材の外周面に対して、複数の積み重ねられた円筒形ターゲット材を、接合材を用いて接合してなり、
隣り合う円筒形ターゲット材が間隔を有して配置されている分割部を有し、かつ分割部において隣り合う円筒形ターゲット材の外周面の段差が0.5mm以下であることを特徴とする、
円筒形スパッタリングターゲット。 - 分割部の間隔の分布が±0.1mm以下であることを特徴とする請求項1記載の円筒形スパッタリングターゲット。
- 分割部において隣り合う円筒形ターゲット材の外周面のエッジ部を面取りすることを特徴とする請求項1又は2に記載の円筒形スパッタリングターゲット。
- 円筒形基材の長さが1000mm以上であることを特徴とする請求項1~3いずれかに記載の円筒形スパッタリングターゲット。
- 円筒形基材の外周面に対して、複数の積み重ねられた円筒形ターゲット材を、接合材を用いて接合することによって円筒形スパッタリングターゲットを製造し、円筒形基材を基準として複数の円筒形ターゲット材を配置する際に、隣り合う円筒形ターゲット材の外周面の段差が0.5mm以下となるように、一方の円筒形ターゲット材の外周面を基準にして他方の円筒形ターゲット材を固定することを特徴とする円筒形スパッタリングターゲットの製造方法。
- 円筒形基材の少なくとも一方の端部の外周面および/又は内周面を円筒形基材の基準面として用い、前記基準面を基準にして前記複数の円筒形ターゲット材を固定することを特徴とする請求項5記載の円筒形スパッタリングターゲットの製造方法。
- 前記複数の円筒形ターゲット材を固定する際には、前記円筒形基材に対して固定されたターゲット押さえによって、前記複数の円筒形ターゲット材の外周面を揃えるように固定することを特徴とする請求項5又は6記載の円筒形スパッタリングターゲットの製造方法。
- 前記複数の円筒形ターゲット材を固定する際には、偶数本の前記ターゲット押さえを、前記円筒形ターゲット材に対してお互いに向かい合う位置に配置することを特徴とする請求項7記載の円筒形スパッタリングターゲットの製造方法。
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EP20090816133 EP2339046B1 (en) | 2008-09-25 | 2009-09-18 | Cylindrical sputtering target, and method for manufacturing same |
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US13/120,863 US9127352B2 (en) | 2008-09-25 | 2009-09-18 | Cylindrical sputtering target, and method for manufacturing same |
KR1020117008863A KR101896701B1 (ko) | 2008-09-25 | 2009-09-18 | 원통형 스퍼터링 타겟 및 그 제조방법 |
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US9127352B2 (en) | 2015-09-08 |
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EP2339046B1 (en) | 2014-02-12 |
JP5482020B2 (ja) | 2014-04-23 |
MY162610A (en) | 2017-06-30 |
US20110240467A1 (en) | 2011-10-06 |
CN102165092A (zh) | 2011-08-24 |
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CN102165092B (zh) | 2014-07-23 |
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TWI491750B (zh) | 2015-07-11 |
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