WO2016017432A1 - 防食性の金属とMo又はMo合金を拡散接合したバッキングプレート、及び該バッキングプレートを備えたスパッタリングターゲット-バッキングプレート組立体 - Google Patents
防食性の金属とMo又はMo合金を拡散接合したバッキングプレート、及び該バッキングプレートを備えたスパッタリングターゲット-バッキングプレート組立体 Download PDFInfo
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- WO2016017432A1 WO2016017432A1 PCT/JP2015/070344 JP2015070344W WO2016017432A1 WO 2016017432 A1 WO2016017432 A1 WO 2016017432A1 JP 2015070344 W JP2015070344 W JP 2015070344W WO 2016017432 A1 WO2016017432 A1 WO 2016017432A1
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- backing plate
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- thermal expansion
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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
- H01J37/3435—Target holders (includes backing plates and endblocks)
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/04—Alloys based on tungsten or molybdenum
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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
- H01J37/3417—Arrangements
Definitions
- the present invention relates to a backing plate used when a low thermal expansion material is used as a sputtering target material, in particular, an anticorrosive metal and Mo that can prevent warpage (deformation) at the time of joining or sputtering of the sputtering target and the backing plate.
- the present invention also relates to a backing plate in which Mo alloy is diffusion-bonded and a sputtering target-backing plate assembly including the backing plate.
- the support plate material (backing plate) is selected in consideration of strength, corrosion resistance, and heat transfer characteristics.
- molybdenum having low conductivity is listed as one of the choices of the support plate material (see paragraphs 0007 and 0027).
- rust of the molybdenum oxide will easily occur and the surrounding environment of the sputtering apparatus will be contaminated. No means for improving the corrosion resistance is mentioned.
- Patent Document 3 describes a Si target using Mo or a Mo / Cu composite as a backing plate.
- the backing plate material may be selected from materials that approximate the thermal expansion coefficient (CTE) of silicon.
- CTE thermal expansion coefficient
- various methods are conceivable as a method for manufacturing the Mo / Cu composite material, but there is no description about a specific solution.
- corrosion resistance and the thickness of Mo / Cu there is no description regarding the corrosion resistance and the thickness of Mo / Cu, and it is considered that the required specification of the target sputtering target cannot be achieved by simply combining them.
- the present invention is a backing plate made of Mo or Mo alloy for joining to a target made of a low thermal expansion material, and the entire backing plate is placed on the surface (cooling surface side) for cooling the Mo or Mo alloy backing plate. It is characterized by comprising a layer made of an anticorrosive metal formed by diffusion-bonding one or more metals selected from Cu, Al or Ti having a thickness of 1/40 to 1/8 or an alloy thereof. Problems in sputtering are the strength and cooling ability of the backing plate itself and the bonding strength between the backing plate and the target.
- the anticorrosive metal is one or more metals selected from Cu, Al or Ti, or alloys thereof.
- the target composed of a low thermal expansion material is a single material of 99.99 wt% (4N) or more of silicon, germanium, or carbon, or a composite material containing 95 wt% or more of these.
- the present invention is a backing plate mainly composed of Mo or Mo alloy having a small expansion coefficient for joining to a target made of a low thermal expansion material, and also used as an anti-corrosion of Mo that is easily corroded by cooling water.
- the present invention relates to a backing plate in which an anticorrosive metal having a thickness of 1/40 to 1/8 of the total thickness of the backing plate is formed as a dense and strong layer on the surface of the plate cooling side (cooling surface side).
- the target which consists of a low thermal expansion material and the backing plate made from Mo or Mo alloy with a close thermal expansion coefficient are joined, the curvature of a sputtering target can be reduced as much as possible. Thereby, there are few particles, and a uniform film can be formed on the entire substrate.
- a layer made of an anti-corrosive metal on the cooling surface of molybdenum there is a problem of black powder rust generated by corrosion of conventional molybdenum mixed into the cooling water, and rust in the clean room when removing the target. It became possible to solve the problem of spreading.
- the present invention is effective in that the anticorrosion treatment is performed.
- sputtering with high power becomes possible, and it has a great effect that the defective rate can be reduced and the production efficiency can be increased by uniform film formation.
- an anti-corrosion metal is introduced on the surface of the Mo or Mo alloy backing plate and the cooling side (cooling surface side) of the Mo or Mo alloy backing plate. It is the figure which joined the sputtering target material to. It is sectional explanatory drawing at the time of carrying out diffusion bonding of OFC (Cu) to the surface of the side which cools Mo backing plate and the said Mo backing plate (cooling surface side). It is sectional explanatory drawing at the time of carrying out diffusion bonding of Al to the surface of the side which cools Mo backing plate and the said Mo backing plate (cooling surface side).
- a voltage is applied to both the target side as the cathode and the substrate side as the anode, and the target material is knocked out by impact on the target by Ar ions, and the method of coating the substrate by its flight
- a so-called self-sputtering coating method in which atoms sputtered from a target are ionized and further sputtered is already known as a sputtering method.
- the sputtering target is bonded to the backing plate, and the backing plate is cooled to prevent an abnormal temperature rise of the target, thereby enabling stable sputtering.
- the backing plate is a material having good thermal conductivity and a material having a certain strength. Nevertheless, there is a problem in that a temperature difference occurs between the bonding interface between the target and the backing plate, strain is accumulated in the bonded portion due to a difference in thermal expansion between the two materials, and peeling or deformation (warping) of the target occurs.
- Deformation (warping) of the target causes a phenomenon that the uniformity of the thin film formed by sputtering deteriorates, or arcing occurs and abnormal particles are generated, and in an extreme case, plasma generation stops.
- Warpage also occurs when the target and the backing plate material are bonded and cooled at a temperature equal to or higher than the melting point of the brazing material.
- a Si having a linear expansion coefficient (CTE) of 2.6 ⁇ 10 ⁇ 6 / K at 20 ° C. a copper alloy or oxygen-free copper (CTE at 20 ° C .: about 17 ⁇ 10 -6 / K) was used.
- CTE linear expansion coefficient
- a method of thickening and relaxing the brazing material layer such as metal indium solder used for joining the target member and the backing plate may be taken, but there is a limit in the case of a large-diameter target. It was not enough for suppression.
- molybdenum that is in direct contact with cooling water is easily corroded and black rust is generated, which causes a problem that adversely affects cooling water (circulating water) and peripheral devices. For this reason, it was necessary to improve the corrosion resistance of Mo, but in this case as well, some problems were caused.
- molybdenum is a difficult-to-plat material and cannot be easily plated. Also, since bonding is performed after plating, the plating film is exposed to high temperatures above the melting point of the brazing material, and the plating film is oxidized and discolored. For example, it is necessary to eliminate the pinhole.
- the practical plating thickness is as thin as about 100 ⁇ m, and when pinholes remain, water may reach molybdenum through that part, in the sense of extending the life, There is a problem that it is difficult to take sufficient measures. Further, in the pasting of the copper plate by spot welding, there is a place (cavity) where the adhesion between the molybdenum and the copper plate is insufficient, and there is a problem that the cooling ability from the cooling surface side to the target surface direction is lowered.
- the Mo or Mo alloy backing plate for joining to the target made of a low thermal expansion material is on the surface of the side that cools the Mo or Mo alloy backing plate (cooling surface side: opposite side of the target to be joined),
- One or more metals selected from Cu, Al or Ti having a thickness of 1/40 to 1/8 of the total thickness of the backing plate, or an alloy layer thereof is formed.
- the layer made of the anticorrosive metal since the layer made of the anticorrosive metal is thin, it becomes a backing plate in which the inhibition of the low thermal expansion / contraction behavior of molybdenum serving as the base of the backing plate is small, so that it is possible to reduce the warpage at the time of bonding with the target.
- these anticorrosive metal rust preventive layers can be produced by diffusion bonding plate materials. By diffusion bonding, it is denser and has higher adhesiveness. Therefore, no pinhole is generated, and the corrosion resistance and durability of the cooling surface can be remarkably improved. Since molybdenum and the anticorrosion layer are completely adhered to each other by diffusion bonding, the heat transfer property is good and the cooling efficiency to the target side is high.
- the present invention does not depend on the above-described bonding method, and various bonding methods can be appropriately selected.
- the cooling side surface of the Mo or Mo alloy backing plate can form a step.
- the step of the Mo or Mo alloy backing plate to be joined is 2 mm or more, the backing plate can be efficiently cooled, which is effective.
- Joining another layer with a thickness of 1/40 to 1/8 of the total thickness at the joint interface of the step becomes a technique that has not been conventionally available.
- the back surface of the backing plate has a step as described above, if the corner of the edge portion stands at the stepped portion, the plates may not stick together, so the stepped portion of the backing plate made of Mo or Mo alloy It is preferable to have curved surfaces R1 to R3 at the corners.
- the Mo or Mo alloy backing plate of the present invention can be applied to a square shape, but is usually disk-shaped and is particularly effective for a large backing plate having a diameter of 500 mm or more.
- a diameter 500 mm or more.
- a groove having a depth of 0.08 to 0.4 mm is preferably formed on the anticorrosive metal bonding surface of the Mo or Mo alloy backing plate at the diffusion bonding interface.
- the bonding strength between the backing plate and the anticorrosive metal can be increased by the anchor effect.
- the Mo or Mo alloy is preferably made of an alloy having Mo of 80 wt% or more, and Mo is preferably in the range of 99.999 wt% (5N) pure Mo.
- the alloy element is not particularly limited, but an alloy containing 0.7 to 1.2 wt% Cr can be used. This Mo or Mo alloy is a material having high strength and high thermal conductivity.
- a Mo or Mo alloy backing plate joined with a target made of a low thermal expansion material, and the target made of a low thermal expansion material is 99.99 wt% (4N )
- the Mo or Mo alloy backing plate prepared in this way and provided with a layer made of the corrosion-resistant metal of the present invention suppresses the corrosion of molybdenum that comes into direct contact with cooling water, and adversely affects drainage and peripheral devices. Can be eliminated.
- the strength and cooling capacity of the backing plate itself and the bonding strength between the backing plate and the target can be increased, and the warpage (deformation) is effectively suppressed by the thermal effect during the joining of the sputtering target and the backing plate or during sputtering. This can solve the problem that particles are generated during sputtering.
- the target material to be joined need not be limited to the above. Further, for joining the target and the backing plate, a conventionally known technique can be used, and there is no particular limitation.
- said 4N shows that the quantity of the metal impurity except gas components, such as oxygen, nitrogen, and carbon, is 0.01 wt% or less.
- Example 1 A specific example of the present invention will be described with reference to FIGS. 3N purity Mo was processed into a disk shape with a diameter of 540 mm and a total thickness of 20 mm, and further a countersink with a diameter of 480 mm and a depth of 4 mm was placed on one side to prepare a concave material 1 serving as the base of the backing plate (see FIG. 1 a, b)).
- the edge of the stepped portion was rounded by R1.5, and a groove having a depth of 0.08 mm was regularly inserted in the entire Mo bottom surface to give an anchor effect at the time of joining (see FIG. 2).
- oxygen-free copper (OFC) 2 which is an anticorrosive metal was processed so that the edge of the convex portion was R1.5, the diameter was 480 mm, the outer diameter was 540 mm, and the total thickness was 7 mm ( See a) and b) of FIG. Furthermore, the concave side is processed with a positive tolerance and the convex side is processed with a negative tolerance. The irregularities of the two materials were connected and placed in a SUS metal capsule, and the inside of the SUS capsule was sealed so that a vacuum could be maintained.
- OFC oxygen-free copper
- bonding was performed at 180 ° C. by using this backing plate and silicon, which is a low thermal expansion material, as the target material 3 and indium as the brazing material 4, and cooled to room temperature while controlling the temperature lowering rate.
- the conventional backing plate is a full-surface OFC
- the warp when the straight gauge is applied to the target surface is about 0.5 mm due to the difference in thermal expansion coefficient from silicon.
- the amount of warpage was less than 0.1 mm by controlling the ratio of OFC serving as an anticorrosion layer based on molybdenum with low thermal expansion.
- Sputtering targets joined to a low thermal expansion target material using such a backing plate greatly reduce warpage compared to the conventional method, and also provide low particle characteristics without corrosion even when the backing plate is cooled with water for a long period of time. I was able to put it out.
- Example 2 A specific example of the present invention will be described with reference to FIGS. 3N purity Mo was processed into a disk shape with a diameter of 540 mm and a total thickness of 18 mm, and a countersink with a diameter of 480 mm and a depth of 3 mm was placed on one side to prepare a concave material to be the base of the backing plate (FIG. 1). reference). At this time, the edge of the stepped portion was rounded with R1.5, and a groove having a depth of 0.12 mm was regularly formed in the entire Mo bottom surface to give an anchor effect at the time of joining.
- the capsule was subjected to HIP treatment at 400 ° C. to 150 MPa, and diffusion bonding between Mo and aluminum was performed.
- HIP treatment 400 ° C. to 150 MPa
- diffusion bonding between Mo and aluminum was performed.
- the capsule was opened and machined into a predetermined backing plate shape.
- the total thickness of the backing plate after processing was 17 mm, aluminum was made to cover the bottom surface of the molybdenum with a thickness of 0.57 mm, which is the anticorrosion layer or 1/30 of that.
- An example of the structure of the backing plate that has been processed is shown in FIG.
- the backing plate and silicon which is a low thermal expansion material, were bonded at 180 ° C. using indium as a brazing material, and cooled to room temperature while controlling the temperature lowering rate.
- indium as a brazing material
- warpage occurs when the straight gauge is applied to the target surface by about 0.7 mm due to the difference in thermal expansion coefficient from silicon.
- Sputtering targets joined to a low thermal expansion target material using such a backing plate greatly reduce warpage compared to the conventional method, and also provide low particle characteristics without corrosion even when the backing plate is cooled with water for a long period of time. I was able to put it out.
- the present invention is a backing plate made of Mo or Mo alloy for joining to a target made of a low thermal expansion material, and the backing plate is formed on the surface on the side (opposite to the sputtering surface) that cools the backing plate made of Mo or Mo alloy. It is characterized by comprising a layer made of an anticorrosive metal obtained by joining one or more metals selected from Cu, Al or Ti having a thickness of 1/40 to 1/8 of the total thickness of the above or an alloy thereof.
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Abstract
Description
一方、半導体デバイスはナノ領域への微細化が進み、従来よりも薄い薄膜で、且つ基板全体に均一な膜厚で成膜することが要求され、そのためスパッタリングターゲットの反りの管理がより厳しくなってきている。
低熱膨張材料のターゲットを作製する場合は、大口径になるほどターゲット材料とバッキングプレート材料との熱膨張量の差が大きくなり、反りやすいという問題があった。
特に低熱膨張のターゲット材と、一般に用いられる銅製のバッキングプレートをロウ材の融点以上に加熱しロウ付け後に冷却する際は、膨張係数の大きい銅製のバッキングプレートの方が大きく収縮するためターゲット材側が凸型になる反り(変形)が発生し、これがスパッタ時に均一な膜の形成を阻害してしまう要因になっている。また接合界面においても両材料の収縮量の差は接合強度を低下させる問題となっている。
高品位な薄膜を、より厳しく要求される最近の半導体の用途では、この課題を解決させる必要があった。さらにスパッタ特性だけでなく、クリーンルーム内や冷却水を汚染させない耐食性に優れたバッキングプレートを有するスパッタリングターゲットが必要となっている。
しかし、モリブデンのバッキングプレートを使用して、もしそのモリブデンに直接触れるように冷却水を流す場合は、容易に酸化モリブデンの錆が発生し、スパッタ装置の周辺環境を汚染するはずだが、文献2ではその耐食性を改善する手段については全く触れていない。
また耐食性やMo/Cuの厚みに関する記述はなく、単純に複合化しただけでは、目標とするスパッタリングターゲットの要求仕様を達成しえないと考えられる。
熱膨張差を緩和させるためにモリブデンをバッキングプレートに用いて水冷する場合に錆の発生を防止する処理が必要となる。本願発明は、これらの問題を解決することを課題とする。
1)ターゲットに接合するためのMo又はMo合金製バッキングプレートであって、当該Mo又はMo合金製バッキングプレートの冷却する側(冷却面側)の表面に、バッキングプレートの総厚の1/40~1/8の厚みを有する防食性の金属からなる層を備えることを特徴とするMo又はMo合金製バッキングプレート。
2)上記防食性の金属が、Cu、Al又はTiから選択した一種以上の金属又はこれらの合金であることを特徴とする1)に記載のMo又はMo合金製バッキングプレート。
4)Mo又はMo合金製バッキングプレートの防食性金属と接合する面の段差部が、R1~R3の曲面を有することを特徴とする前記1~3)に記載のMo又はMo合金製バッキングプレート。
6)前記拡散接合界面のMo又はMo合金製バッキングプレートの防食性金属の接合面に、深さ0.08~0.4mmの溝を有することを特徴とする前記1)~5)のいずれか一項に記載のMo又はMo合金製バッキングプレート。
8)前記1)~7)のいずれか一項に記載のMo又はMo合金製バッキングプレートと低熱膨張材料からなるターゲットを接合したことを特徴とするスパッタリングターゲット-バッキングプレート組立体。
また、モリブデンの冷却面側に防食性の金属からなる層を備えることにより、従来のモリブデンの腐食で発生する黒い粉状の錆が冷却水に混入する問題や、ターゲットの取り外し時にクリーンルーム内に錆が拡散する、という問題を解決することが可能となった。
多くの場合、スパッタリングターゲットはバッキングプレートに接合し、かつ該バッキングプレートを冷却して、ターゲットの異常な温度上昇を防止し、安定したスパッタリングが可能なように構成されている。
このような問題の解決のため、バッキングプレートの強度を高める、あるいは材質を変更して熱応力を軽減させる等の対策をとることが考えられるが、ターゲットの材質である低熱膨張材料との適合性の問題があり、これまで適切な解決方法が見出されていなかった。
従来は、線膨張係数(CTE)が20℃で2.6×10-6/KであるSiに対して、バッキングプレートに、銅合金や無酸素銅(20℃でのCTE:約17×10-6/K)が使用されていた。そのためバッキングプレート側が大きく収縮し、スパッタリング材料側に凸型に変形していた。
その対策として、ターゲット部材とバッキングプレートの接合で使用される金属インジウム半田等のロウ材の層を厚くして緩和させる方法がとられることもあるが、大口径のターゲットでは限界があり、反りの抑制に十分とは言えなかった。
また、スポット溶接での銅板の貼り付けでは、モリブデンと銅板との密着が不十分なところ(空洞)が存在し、冷却面側からターゲット面方向への冷却能が低下する問題があった。
例えば、これらの防食性の金属の防錆層は板材を拡散接合して作製することができる。拡散接合することにより、より緻密で密着性が高く、そのためピンホールの発生はなく、冷却面の耐食性、耐久性を著しく向上できる効果がある。そして、拡散接合によりモリブデンと防食層は、完全密着しているので、熱伝達性が良く、ターゲット側への冷却効率が高いという特性を有することができる。本発明は、上記接合方法に依存せず、種々の接合方法を適宜選択することができる。
前記Mo又はMo合金は、合金の場合はMoが80wt%以上の合金からなること、またMoは99.999wt%(5N)の純Moの範囲にあるのが望ましい。合金元素に特に制限はないが、Cr0.7~1.2wt%含有する合金を使用することができる。このMo又はMo合金は、強度が高くかつ熱伝導性に富む材料である。
本発明の具体例を、図1、図2を用いて説明する。純度3NのMoを直径540mm、総厚20mmの円盤状に加工し、さらに片方の面に直径480mm、深さ4mmの座繰りを入れ、バッキングプレートのベースになる凹型の材料1を準備した(図1のa、b)参照)。この時、段差部のエッジはR1.5の丸みをつけ、またMo底面全体には接合時にアンカー効果を持たせるために深さ0.08mmの溝を規則的に入れた(図2参照)。
この2つの材料の凹凸を連結させ、SUS製の金属カプセルの中に入れ、SUS製のカプセルの内部が真空を維持できるように封じ込めた。
しかし、今回は、低熱膨張のモリブデンをベースにし、防食層となるOFCの比率を制御することにより、反り量は0.1mm未満になった。ボンディングが完了したスパッタリングターゲットの断面構造の例を、図1のb)に示す。
本発明の具体例を、図1、3を用いて説明する。純度3NのMoを直径540mm、総厚18mmの円盤状に加工し、さらに片方の面に直径480mm、深さ3mmの座繰りを入れ、バッキングプレートのベースになる凹型の材料を準備した(図1参照)。この時、段差部のエッジはR1.5の丸みをつけ、またMo底面全体には接合時にアンカー効果を持たせるために深さ0.12mmの溝を規則的に入れた。
嵌め込み部分の公差は、実施例1と同様に注意した。この2つの材料の凹凸を連結させ、アルミの蓋をかぶせ、真空中でEB溶接して、アルミ容器の内部が真空を維持できるように封じ込めた。
次に、このアルミの面に冷却水が直接触れるように水を循環させ、30日連続運転後に、表面状態を観察した。その結果、アルミの表面はほとんど変化が見られず、下地のMoは完全に保護されており、従来のようにMoが腐食して黒い錆が発生するようなことはなかった。
Claims (9)
- ターゲットに接合するためのMo又はMo合金製バッキングプレートであって、当該Mo又はMo合金製バッキングプレートの冷却する側(冷却面側)の表面に、バッキングプレートの総厚の1/40~1/8の厚みを有する防食性の金属からなる層を備えることを特徴とするMo又はMo合金製バッキングプレート。
- 上記防食性の金属が、Cu、Al又はTiから選択した一種以上の金属又はこれらの合金であることを特徴とする請求項1に記載のMo又はMo合金製バッキングプレート。
- Mo又はMo合金製バッキングプレートの防食性金属と接合する面は、段差を有し、当該段差が2mm以上であることを特徴とする請求項1~2に記載のMo又はMo合金製バッキングプレート。
- Mo又はMo合金製バッキングプレートの防食性金属と接合する面の段差部が、R1~R3の曲面を有することを特徴とする請求項1~3に記載のMo又はMo合金製バッキングプレート。
- Mo又はMo合金製バッキングプレートが円盤状であり、直径が500mm以上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Mo又はMo合金製バッキングプレート。
- 前記拡散接合界面のMo又はMo合金製バッキングプレートの防食性金属の接合面に、深さ0.08~0.4mmの溝を有することを特徴とする請求項1~5のいずれか一項に記載のMo又はMo合金製バッキングプレート。
- 前記Mo合金は、Moを80wt%以上含有する合金であることを特徴とする請求項1~6のいずれか一項に記載のMo合金製バッキングプレート。
- 請求項1~7のいずれか一項に記載のMo又はMo合金製バッキングプレートと低熱膨張材料からなるターゲットを接合したことを特徴とするスパッタリングターゲット-バッキングプレート組立体。
- 低熱膨張材料からなるターゲットが、99.99wt%(4N)以上のシリコン、ゲルマニウム、カーボンのいずれかの単一材料又はこれらを95wt%以上含む複合材料あることを特徴とする請求項8に記載のスパッタリングターゲット-バッキングプレート組立体。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US15/329,339 US10381203B2 (en) | 2014-07-31 | 2015-07-16 | Backing plate obtained by diffusion-bonding anticorrosive metal and Mo or Mo alloy, and sputtering target-backing plate assembly provided with said backing plate |
KR1020167036528A KR101923292B1 (ko) | 2014-07-31 | 2015-07-16 | 방식성의 금속과 Mo 또는 Mo 합금을 확산 접합한 백킹 플레이트, 및 그 백킹 플레이트를 구비한 스퍼터링 타깃-백킹 플레이트 조립체 |
CN201580038825.5A CN106536787B (zh) | 2014-07-31 | 2015-07-16 | 将防腐蚀性金属与Mo或Mo合金扩散接合而得到的背衬板、以及具备该背衬板的溅射靶-背衬板组件 |
JP2016538263A JP6130075B2 (ja) | 2014-07-31 | 2015-07-16 | 防食性の金属とMo又はMo合金を拡散接合したバッキングプレート、及び該バッキングプレートを備えたスパッタリングターゲット−バッキングプレート組立体 |
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JP (1) | JP6130075B2 (ja) |
KR (1) | KR101923292B1 (ja) |
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JP6546953B2 (ja) | 2017-03-31 | 2019-07-17 | Jx金属株式会社 | スパッタリングターゲット−バッキングプレート接合体及びその製造方法 |
JP6854306B2 (ja) | 2019-02-12 | 2021-04-07 | Jx金属株式会社 | スパッタリングターゲット−バッキングプレート接合体 |
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US20170213712A1 (en) | 2017-07-27 |
KR20170012439A (ko) | 2017-02-02 |
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JP6130075B2 (ja) | 2017-05-17 |
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