JPH01319673A - Laser beam sputtering method - Google Patents

Laser beam sputtering method

Info

Publication number
JPH01319673A
JPH01319673A JP15311888A JP15311888A JPH01319673A JP H01319673 A JPH01319673 A JP H01319673A JP 15311888 A JP15311888 A JP 15311888A JP 15311888 A JP15311888 A JP 15311888A JP H01319673 A JPH01319673 A JP H01319673A
Authority
JP
Japan
Prior art keywords
target
laser beam
cylindrical lens
sputtering method
film formation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP15311888A
Other languages
Japanese (ja)
Inventor
Masakazu Matsui
正和 松井
Eiki Cho
張 栄基
Keiji Mashita
啓治 真下
Chikushi Hara
原 築志
Okaya Nozaki
野崎 崗哉
Kiyoshi Ogawa
潔 小川
Takeshi Kurihara
武司 栗原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Furukawa Electric Co Ltd
Original Assignee
Furukawa Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Furukawa Electric Co Ltd filed Critical Furukawa Electric Co Ltd
Priority to JP15311888A priority Critical patent/JPH01319673A/en
Publication of JPH01319673A publication Critical patent/JPH01319673A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C14/00Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/22Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
    • C23C14/24Vacuum evaporation
    • C23C14/28Vacuum evaporation by wave energy or particle radiation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physical Vapour Deposition (AREA)

Abstract

PURPOSE:To form a film which is uniform in stoichiometric ratio over a wide region and obviates the generation of a deviation in compsn. by shaping a laser beam to an elliptic sectional plane by a cylindrical lens and irradiating the peripheral face of a target with this laser beam. CONSTITUTION:The laser beam 3 is shaped to the elliptical sectional or rectangular sectional plane to comply with the size of the target 1 by the cylindrical lens 6 and the peripheral face of the rotating target 1 is irradiated with this laser beam in the laser beam sputtering of the material consisting of >=2 components. The area for interaction of the laser beam 3 and the target 1 increases and target atoms 4 of the multicomponent materials deposit efficiently on a substrate. The film formation to obviate the generation of the deviation in the compsn. with time is executed in this way during the film formation using the rotary target 1. In addition, the life of the target 1 is prolonged.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明のレーザビートスパッタ法は、2成分以−1−か
らなる物質をl/−ザスバッタする方法の改良に関する
ものであり、例えば酸化物超伝導膜を得るのに使用され
るものである。
DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The laser beat sputtering method of the present invention relates to an improvement in the method of sputtering a substance consisting of two or more components. It is used to obtain conductive membranes.

(従来の技術) 薄膜の成膜方法としては従来から、マグネトロンスパッ
タリング法、蒸着法、イオンビームスパッタ法、1/−
ザスパッタ法などが知られている。
(Prior art) Conventional methods for forming thin films include magnetron sputtering, vapor deposition, ion beam sputtering, and 1/-
The Zasputter method is known.

この中でレーザスパンク法は成膜速度が大きいことに特
徴がある。
Among these methods, the laser spanking method is characterized by a high film formation rate.

しかし、I/−ザスパッタ法ではレーザエネルキ−が大
きいため、通常の固定ターケラトを用いたのでは、レー
ザを数ショットするだけでターゲットが変質したり、割
れたりして使用不能になる。
However, in the I/-the sputtering method, the laser energy is large, so if a normal fixed target is used, the target will deteriorate or crack after just a few shots of the laser, making it unusable.

そこで近年は多丑に成膜するときは回転ターゲフトが用
いられている。
Therefore, in recent years, a rotating target shaft has been used when depositing a large number of films.

(発明が解決しようとする課題) 回転ターゲットを使用することによりターゲットの寿命
が大幅に延びたが、一方においては、広い領域で化学量
論比が均一で且つ成膜の進行と共に組成がずれないよう
にすることか不可能となった。このため回転ターゲット
を使用すると、線材等のテープ状体への応用、或は3イ
ンチ、5インチウェーハー等への成膜が困難であり、工
業化への妨げとなっていた。
(Problem to be solved by the invention) The life of the target has been significantly extended by using a rotating target, but on the other hand, the stoichiometric ratio is uniform over a wide area and the composition does not shift as film formation progresses. It became impossible to do so. For this reason, when a rotating target is used, it is difficult to apply it to a tape-shaped object such as a wire or to form a film on a 3-inch or 5-inch wafer, which has been an obstacle to industrialization.

これらの聞届を解決する方法として、ターゲットとそれ
と対向する基板との間の距離を大きくしたり、レーザの
パワーを下げたりすることが考えられるか、これでは成
膜速度が大幅に低下し、また真空チャンバーが大型化し
てしまい、工業化への現実的な解決策とはならなかった
Possible ways to solve these problems include increasing the distance between the target and the substrate facing it or lowering the laser power, but this would significantly reduce the deposition rate. In addition, the vacuum chamber became large, and it was not a realistic solution for industrialization.

(発明の目的) 本発明の目的は円柱形のターゲットを回転させると共に
、レーザビームをシリンドリカル−レンズによってター
ゲットの寸法に合わせて、楕円形成は長方形に整形して
ターゲットの周面に照射させて、点蒸発から面蒸発又は
線蒸発にかえることによって、広い領域にわたって化学
量論比が均一で且つ成膜中に時間的に組成ずれがおきず
、またり〜ゲットが長もちするレーザビームスパッタ法
を提供することにある。
(Objective of the Invention) The object of the present invention is to rotate a cylindrical target, adjust the laser beam to the size of the target using a cylindrical lens, shape the ellipse into a rectangle, and irradiate the circumferential surface of the target. By changing from point evaporation to surface evaporation or line evaporation, we provide a laser beam sputtering method in which the stoichiometric ratio is uniform over a wide area, there is no temporal composition shift during film formation, and the target is long-lasting. It's about doing.

(問題点を解決するだめの手段) 本発明のレーザビートスパッタ法は第1図のように、回
転する円柱形のターゲ・ント1の周面2にレーザビー1
・3を照射してターゲットlからターケンl−原子4を
飛散させ、同原了4をターゲット1と対向して配置した
基板5に析出させるようにしたl/−ザビームスバッタ
法において、第2図A部分のように断面円形の17−ザ
ビーム3をシリンドリカル・レンズ6によって第2図B
部分のように断面楕円形に整形して、円柱形のターゲ・
ント1の周面2に照射するようにしたものである。
(Means for Solving the Problems) The laser beam sputtering method of the present invention is as shown in FIG.
・In the l/- the beam scattering method, in which Tarken l-atoms 4 are scattered from the target l by irradiating the target with 17-the beam 3 with a circular cross section as shown in Figure A part is connected to the cylindrical lens 6 in Figure 2B
Shape the cross section into an oval shape like a part, and create a cylindrical target.
The light is irradiated onto the peripheral surface 2 of the lens 1.

(発明の作用) 第1図、第2図は本発明のレーザビームスパッタ法の説
明図である。第1図において、ビーム源7からのレーザ
ビーム3がビームレンズ8を通して導入窓9からチャン
バー10内に導入され、回転するディスク状のターゲッ
ト1の周面2に照射されると、同し−ザビーム3かター
ゲット1に吸収されてターゲット原子4が飛散し、基板
5に析出する。本発明ではこのとき、第2図のように断
面円形であるレーザビーム3がシリンドリカル・レンズ
5により断面楕円形に整形されてターゲット1の周面2
に照射されるため、レーザビーム3とターゲット1との
相互作用面積が増加し、ターゲット原子4(多成分物質
)が効率良く基板5に析出される。
(Operation of the Invention) FIGS. 1 and 2 are explanatory diagrams of the laser beam sputtering method of the present invention. In FIG. 1, a laser beam 3 from a beam source 7 is introduced into a chamber 10 from an introduction window 9 through a beam lens 8 and is irradiated onto the peripheral surface 2 of a rotating disc-shaped target 1. The target atoms 4 are absorbed by the target 1, and the target atoms 4 are scattered and deposited on the substrate 5. In the present invention, at this time, the laser beam 3 having a circular cross section is shaped into an elliptical cross section by the cylindrical lens 5 as shown in FIG.
Therefore, the interaction area between the laser beam 3 and the target 1 increases, and the target atoms 4 (multicomponent substance) are efficiently deposited on the substrate 5.

このときターゲットlの周面2はターゲット原子4が飛
散することにより第3図のように凹凸になったり、変質
したりするので、本発明では回転中のターゲラ)1にl
/−ザビーム3を照射させると同時に、第2図のように
同ターゲット1の反対側にバイト等の切削工具aを当て
るなどして、その凹凸11や変質層12を除去して、タ
ーゲットlの周面2を第4図のようにほぼ平滑にするの
が望ましい。
At this time, the circumferential surface 2 of the target l becomes uneven or altered in quality as shown in FIG. 3 due to the scattering of target atoms 4.
/- At the same time as the beam 3 is irradiated, as shown in FIG. It is desirable that the circumferential surface 2 be substantially smooth as shown in FIG.

(実施例) 本発明の17−ザビームスバツタ法の−・例を図面に基
づいて説明する。第1図はレーザビートスパッタ法のM
略説明IAである。同図ではチャンバー10内を真空に
するための排気系は省略されている。
(Example) An example of the 17-beamsbutter method of the present invention will be described based on the drawings. Figure 1 shows the M of laser beat sputtering method.
This is a brief explanation IA. In the figure, an exhaust system for evacuating the chamber 10 is omitted.

第1図において10は真空チャンバー、1は同チャンバ
ー内に設置されたターゲット、3はターゲット1と対向
して設置された基板である。
In FIG. 1, 10 is a vacuum chamber, 1 is a target placed in the chamber, and 3 is a substrate placed facing the target 1.

ターケラ[1はディスク状であり、中心が回転軸に固定
されて任意のスピードで回転されるようにしである。
Thakera [1 is disk-shaped, and its center is fixed to a rotating shaft so that it can be rotated at any speed.

基板5はホルダー13に支持され、同ホルダー13を必
要に応じてにF動又は回転することにより上ド動又は回
転できるようにしである。また、基板5はホールター1
3に内蔵され、必要温度に加熱される。
The substrate 5 is supported by a holder 13, and can be moved up or rotated by moving or rotating the holder 13 as necessary. Also, the board 5 is the halter 1
3 and is heated to the required temperature.

第2図の6はシリンドリカル・レンズであり、これは断
面円形のビーム3(第2図A部分)を断面楕円形(第2
図B部分)にして、ターゲット1の周面2に照射するも
のである。
6 in Fig. 2 is a cylindrical lens, which converts the beam 3 with a circular cross section (part A in Fig. 2) into an elliptical cross section (the second
(Part B in the figure) and irradiates the peripheral surface 2 of the target 1.

次に本発明の具体的実施例を示す。第1図の設備を使用
して、次のような条件で酸化物超電導体(Y+ Ba2
Cu:+Ox )の成膜を行った。
Next, specific examples of the present invention will be shown. Using the equipment shown in Figure 1, an oxide superconductor (Y+ Ba2
A film of Cu:+Ox) was formed.

チャンバー10内を102torrとし、ターゲット1
としてY:Ba  :C,=1・2:3(モル比)で混
合焼成した30φ×[2oのディスクを用い、このター
ゲット1を6 Or、p、mで回転させた。
The inside of the chamber 10 is set to 102 torr, and the target 1
A disk of 30φ×[2o] mixed and fired with Y:Ba:C,=1·2:3 (molar ratio) was used, and this target 1 was rotated at 6 Or, p, m.

 基板5としてM、0単結晶(100)を用い、それを
ターゲy l−1の上方40mmの位置に設は七つブロ
ックヒータにより600°Cに加熱した。
An M,0 single crystal (100) was used as the substrate 5, and was heated to 600°C using a seven-block heater placed 40 mm above the target Yl-1.

  ビーム源7としてC02l/−ザ(CWl、2 K
讐)を用い、それから発生する15φの断面円形のレー
ザビーム3を、f=1511のシリンドリカル・レンズ
6により長袖15mm、短軸1mmの断面楕円形に整形
して、ターゲラ)lに水平方向に1回転分の昨間だけ照
射した。
As beam source 7 C02l/-the(CWl, 2 K
The generated laser beam 3 with a circular cross section of 15φ is shaped into an elliptical cross section with a long sleeve of 15 mm and a short axis of 1 mm using a cylindrical lens 6 of f=1511, and is I irradiated only the last part of the rotation.

この場合、ターゲフト1を図丞されていない上下機構に
より−1−下動させて、レーザビーム3が常にターゲッ
トlの周面2に当たるようにした。
In this case, the target lift 1 was moved downward by -1 by a vertical mechanism (not shown) so that the laser beam 3 always struck the circumferential surface 2 of the target 1.

前記実施例との比較のため、同実施例のビーム3と同じ
ビームを用い、同ビーム3をf=1511の通常のレン
ズにより、1mmφのスポットに同じエネルギー密度に
なるようにレーザパワーを調整して照射した。
For comparison with the previous example, the same beam as beam 3 of the same example was used, and the laser power was adjusted so that the same energy density was applied to a 1 mmφ spot using a normal lens with f=1511. irradiated.

前記実施例及び比較例において、第5図のようにターゲ
ット1の真1−に基板5aを置き、ターゲフト1の中心
から20mmと40mmの位置にも基板5b、5Cを置
いて、夫々の基板5a、5b、5Cへ成膜し、それらの
各膜の組成の均一性をI CP (inductive
ly coupled plasma)分析法により調
べた。
In the Examples and Comparative Examples, the substrate 5a is placed at the center 1- of the target 1 as shown in FIG. , 5b, and 5C, and the uniformity of the composition of each film was measured using I CP (inductive
ly coupled plasma) analysis method.

次に、ターゲット】を交換せずに同様の実験を繰り返し
て、成膜進度と共に膜組成のずれを調べた。
Next, the same experiment was repeated without replacing the target to examine the film formation progress and deviations in film composition.

」−記実施例と比較例の結果を表1に示す。結果はYを
1としだモル比で表わす。
Table 1 shows the results of Examples and Comparative Examples. The results are expressed as a molar ratio with Y being 1.

上記実施例により臨界温度TC=82k、臨界型Vfi
Jc = 4X 10’ A/cm2(a t 77K
) 、組成Yl  : Ba  : Cu = 1 :
 2.0  : 3.1の酸化物超電導膜を作成するこ
とができた。
According to the above embodiment, critical temperature TC=82k, critical type Vfi
Jc = 4X 10' A/cm2 (at 77K
), composition Yl: Ba: Cu = 1:
An oxide superconducting film of 2.0:3.1 was able to be created.

なお、レーザのエネルギー密度を変えても、ターゲラ)
・1の組成を調整すれば同様な効果が得られることもわ
かった。
Note that even if the energy density of the laser is changed, the
・It was also found that similar effects can be obtained by adjusting the composition of 1.

表1 (発明の効果) 本発明のレーザビームスパッタ法によれば、表1から明
らかなように、ターゲットの1回転1]も50回転[1
も従来例に比してバラツキが少ない。
Table 1 (Effects of the Invention) According to the laser beam sputtering method of the present invention, as is clear from Table 1, one rotation of the target is 50 rotations [1].
Also, there is less variation compared to the conventional example.

従って広い領域に化学量論比が均一・で目−つ成膜中に
時間的に組成ずれをおこさない成膜を行なうことができ
る。
Therefore, it is possible to form a film in which the stoichiometric ratio is uniform over a wide area and no compositional deviation occurs over time during film formation.

また、本発明によればターゲットlの寿命も長くなる。Furthermore, according to the present invention, the life of the target l is also extended.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明のレーザビームスパッタ法の概略説明図
、第2図は同法におけるレーザビームのデフォーカスの
説明図、第3図はターゲットの周面の凹凸及び変質状態
を示す説明図、第4図はターゲットの凹凸及び変質部を
除去した状態の説明図、第5図は本発明の詳細な説明図
である。 1はターゲット 2は周面 3はI/−ザビーム 4はターゲット原子 5は基板 6はシリンドリカル・レンズ
FIG. 1 is a schematic explanatory diagram of the laser beam sputtering method of the present invention, FIG. 2 is an explanatory diagram of the defocusing of the laser beam in the same method, and FIG. 3 is an explanatory diagram showing the unevenness and altered state of the peripheral surface of the target. FIG. 4 is an explanatory view of the target with the unevenness and altered parts removed, and FIG. 5 is a detailed explanatory view of the present invention. 1 is a target 2 is a peripheral surface 3 is an I/-the beam 4 is a target atom 5 is a substrate 6 is a cylindrical lens

Claims (1)

【特許請求の範囲】[Claims] 回転するターゲット1の周面2にレーザビーム3を照射
してターゲット1からターゲット原子4を飛散させ、同
原子4をターゲット1と対向して配置された基板5に析
出させるようにしたレーザビームスパッタ法において、
レーザビーム3をシリンドリカル・レンズ6によって楕
円断面或は長方断面に整形集束してターゲット1の周面
2に照射させるようにしたことを特徴とするレーザビー
ムスパッタ法。
Laser beam sputtering in which target atoms 4 are scattered from the target 1 by irradiating the peripheral surface 2 of a rotating target 1 with a laser beam 3, and the same atoms 4 are deposited on a substrate 5 placed opposite the target 1. In law,
A laser beam sputtering method characterized in that a laser beam 3 is shaped and focused into an elliptical or rectangular cross section by a cylindrical lens 6 and is irradiated onto the circumferential surface 2 of a target 1.
JP15311888A 1988-06-21 1988-06-21 Laser beam sputtering method Pending JPH01319673A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15311888A JPH01319673A (en) 1988-06-21 1988-06-21 Laser beam sputtering method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15311888A JPH01319673A (en) 1988-06-21 1988-06-21 Laser beam sputtering method

Publications (1)

Publication Number Publication Date
JPH01319673A true JPH01319673A (en) 1989-12-25

Family

ID=15555366

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15311888A Pending JPH01319673A (en) 1988-06-21 1988-06-21 Laser beam sputtering method

Country Status (1)

Country Link
JP (1) JPH01319673A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5405659A (en) * 1993-03-05 1995-04-11 University Of Puerto Rico Method and apparatus for removing material from a target by use of a ring-shaped elliptical laser beam and depositing the material onto a substrate
EP2159300A1 (en) * 2008-08-25 2010-03-03 Solmates B.V. Method for depositing a material

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5405659A (en) * 1993-03-05 1995-04-11 University Of Puerto Rico Method and apparatus for removing material from a target by use of a ring-shaped elliptical laser beam and depositing the material onto a substrate
US5557471A (en) * 1993-03-05 1996-09-17 University Of Puerto Rico Lens for depositing target material on a substrate
EP2159300A1 (en) * 2008-08-25 2010-03-03 Solmates B.V. Method for depositing a material
WO2010023174A1 (en) * 2008-08-25 2010-03-04 Solmates B.V. Method for depositing a material
JP2012500901A (en) * 2008-08-25 2012-01-12 ソルマテス・ベスローテン・フェンノートシャップ How to deposit materials
KR101307592B1 (en) * 2008-08-25 2013-09-12 솔마이츠 비.브이. Method for depositing a material
US9074282B2 (en) 2008-08-25 2015-07-07 Solmates B.V. Method for depositing a material

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