WO2010084909A1 - 磁性膜加工チャンバのクリーニング方法、磁性素子の製造方法、および基板処理装置 - Google Patents
磁性膜加工チャンバのクリーニング方法、磁性素子の製造方法、および基板処理装置 Download PDFInfo
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- WO2010084909A1 WO2010084909A1 PCT/JP2010/050704 JP2010050704W WO2010084909A1 WO 2010084909 A1 WO2010084909 A1 WO 2010084909A1 JP 2010050704 W JP2010050704 W JP 2010050704W WO 2010084909 A1 WO2010084909 A1 WO 2010084909A1
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- cleaning
- gas
- plasma
- processing chamber
- magnetic
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- 238000004140 cleaning Methods 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000012545 processing Methods 0.000 title claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 239000000758 substrate Substances 0.000 title claims abstract description 15
- 230000005291 magnetic effect Effects 0.000 title claims description 37
- 239000007789 gas Substances 0.000 claims description 76
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 15
- 229910052760 oxygen Inorganic materials 0.000 claims description 14
- 239000001301 oxygen Substances 0.000 claims description 13
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 12
- 229910001882 dioxygen Inorganic materials 0.000 claims description 12
- 238000001312 dry etching Methods 0.000 claims description 12
- 229910052739 hydrogen Inorganic materials 0.000 claims description 12
- 239000001257 hydrogen Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 5
- 238000005530 etching Methods 0.000 abstract description 61
- 230000000694 effects Effects 0.000 abstract description 5
- 229910003271 Ni-Fe Inorganic materials 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- -1 fluorine ions Chemical class 0.000 description 4
- 150000002894 organic compounds Chemical class 0.000 description 4
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 229910020598 Co Fe Inorganic materials 0.000 description 2
- 229910002519 Co-Fe Inorganic materials 0.000 description 2
- 229910003321 CoFe Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910018516 Al—O Inorganic materials 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229910019041 PtMn Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000005290 antiferromagnetic effect Effects 0.000 description 1
- 229910021386 carbon form Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N50/00—Galvanomagnetic devices
- H10N50/10—Magnetoresistive devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y25/00—Nanomagnetism, e.g. magnetoimpedance, anisotropic magnetoresistance, giant magnetoresistance or tunneling magnetoresistance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/09—Magnetoresistive devices
- G01R33/093—Magnetoresistive devices using multilayer structures, e.g. giant magnetoresistance sensors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/09—Magnetoresistive devices
- G01R33/098—Magnetoresistive devices comprising tunnel junctions, e.g. tunnel magnetoresistance sensors
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N50/00—Galvanomagnetic devices
- H10N50/01—Manufacture or treatment
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
- G11B5/3163—Fabrication methods or processes specially adapted for a particular head structure, e.g. using base layers for electroplating, using functional layers for masking, using energy or particle beams for shaping the structure or modifying the properties of the basic layers
Definitions
- the present invention relates to a method for cleaning a magnetic film processing chamber, a method for manufacturing a magnetic element, and a substrate processing apparatus that are highly productive and excellent in reliability.
- Patent Document 1 there is known a method of cleaning a processing chamber by introducing a cleaning gas and generating plasma without introducing an object to be processed into a processing chamber for dry etching or film formation. It has been. As a result, the film material adhering to the processing chamber during dry etching or film formation is removed and evacuated, and the adhering film material is peeled off during processing to cause particles, plasma density distribution, etc. It is possible to prevent the generation state from changing at each processing time, and it is possible to manufacture highly reliable electronic components.
- Patent Document 1 carbon tetrafluoride gas is used as the cleaning gas. As described above, when the cleaning process is performed using the carbon tetrafluoride gas, the cleaning process takes time and the productivity is lowered.
- the present invention has been made in view of the above-described problems, and an object of the present invention is to provide a magnetic film processing chamber cleaning method, a magnetic element manufacturing method, and a substrate processing apparatus that can shorten the cleaning process time. It is to provide.
- the present invention provides a cleaning method for a magnetic film processing chamber, which forms a plasma of a cleaning gas containing oxygen and hydrogen as elements, and adheres to the chamber by processing the magnetic film. And a cleaning step of removing the metal film constituting the magnetic film.
- the present invention also relates to a method for manufacturing a magnetic element, wherein oxygen and oxygen are contained in the processing chamber in a state where the magnetic multilayer film is retracted from the processing chamber between processing for the magnetic multilayer film including at least the magnetic layer. It is characterized by having a cleaning step of forming a cleaning gas plasma containing hydrogen as an element and removing deposits on the processing chamber caused by the processing.
- the present invention is a substrate processing apparatus capable of performing a dry etching process, comprising: a processing chamber; plasma generating means for generating plasma in the processing chamber; and a cleaning containing oxygen and hydrogen as elements in the processing chamber.
- a gas introducing unit for introducing a gas, the plasma generating unit and the plasma generating unit so as to introduce the cleaning gas into the processing chamber and generate a plasma of the cleaning gas
- control means for controlling the gas introduction means.
- the etching chamber can be cleaned in a short time, and the manufacture of electronic parts such as magnetoresistive elements having high productivity and reliability can be realized.
- a method of manufacturing a magnetic element such as a magnetoresistive element of the present invention will be described by taking as an example a case of manufacturing a TMR (Tunnel Magneto-Resistance) element.
- the TMR element can be used for an MRAM (Magnetic Random Access Memory), a magnetic head sensor, or the like.
- MRAM Magnetic Random Access Memory
- - inserted between metal elements is a notation specifying the composition ratio.
- FIG. 1 is a schematic sectional view showing an example of a manufacturing process of a TMR element made of a magnetic multilayer film
- FIG. 2 is a flowchart showing a method of manufacturing a magnetoresistive element including a cleaning process according to the present embodiment.
- a Ta film 1, an Al film 2 as a lower electrode, a Ta film 3 as an underlayer, an antiferromagnetic layer 4 made of PtMn, and a ferromagnetic material made of Co—Fe are formed on a substrate S.
- the pinned layer 5, the insulating layer 6 made of Al—O, and the ferromagnetic free layer 7 made of Co—Fe are sequentially stacked.
- a Ni—Fe layer 8 as a shield layer and a Ta film 9 as a metal mask layer are laminated on the free layer 7.
- a multilayer film 16 as shown in step 1 of FIG. 1 is prepared.
- all necessary films are stacked by a sputtering apparatus.
- the film configuration is not limited to that shown in FIG. 1, and includes at least an MTJ (Magnetic tunnel Junction) portion including the insulating layer 6 and the ferromagnetic layers (pinned layer 5 and free layer 7) formed on both sides thereof. Anything is acceptable.
- the pinned layer 5 may be a plurality of layers, for example, a pinned layer and a layer having a spacer and a reference layer (for example, CoFe / Ru / CoFe).
- the insulating layer 6 is not limited to the one formed of alumina, and may be magnesium oxide or magnesium oxide added with other elements. That is, in the present invention, the configuration itself of the MTJ portion is not essential, so any specific configuration or material may be used.
- a first etching step is performed in which a metal mask layer is formed on the multilayer film prepared in step 1, and the metal mask layer is processed into a predetermined pattern.
- a resist mask layer 10 for processing the magnetic multilayer film into a predetermined pattern is formed on the Ta film 9, and the resist mask layer 10 formed on the Ta layer 9 by exposure and development is formed into a predetermined pattern.
- step 3 of FIG. 1 using this resist mask layer 10 as a mask, the Ta film 9 is processed into a predetermined pattern by a dry etching process (step S101 of FIG. 2: first etching step).
- a gas having a higher etching rate with respect to the Ta film 9 than the resist mask layer 10 is used as an etching gas.
- a halogen-based gas such as carbon tetrafluoride gas (CF 4 gas) is used as an etching gas used in the first etching step.
- the gas introduction system 23 is operated, and from a cylinder 23c storing a gas containing CF 4 gas as an etching gas in the first etching process, through a pipe 23b, valves 23a, 23d, 23f, and a flow rate regulator 23e. Then, an etching gas (CF 4 ) having a predetermined flow rate is introduced into the vacuum vessel 33.
- the introduced etching gas diffuses into the dielectric wall container 24 through the vacuum container 33.
- plasma is generated in the vacuum vessel 33.
- the exhaust system 21 is also activated.
- the mechanism for generating plasma includes a dielectric wall container 24, a one-turn antenna 25 that generates a dielectric magnetic field in the dielectric wall container 24, a high-frequency power source 27 for plasma, and a predetermined magnetic field in the dielectric wall container 24. Electromagnets 28, 29 and the like.
- the dielectric container 24 is hermetically connected to the vacuum container 33 so that the internal space is in communication, and the plasma high-frequency power source 27 is connected to the antenna 25 by a transmission line 26 via a matching unit (not shown). .
- a large number of side wall magnets 22 are arranged outside the side wall of the vacuum vessel 33 in a circumferential direction so that adjacent magnets have different magnetic poles on the side where the side wall of the vacuum vessel 33 is desired. .
- a cusp magnetic field is continuously formed along the inner surface of the side wall of the vacuum vessel 33 in the circumferential direction, and plasma diffusion to the inner surface of the side wall of the vacuum vessel 33 is prevented or reduced.
- the bias high-frequency power supply 30 is operated to apply a bias voltage, which is a negative DC component voltage, to the multilayer film 16 that is the object to be etched, and the ion incident energy from the plasma to the surface of the substrate 16. Is controlling.
- the plasma formed as described above diffuses from the dielectric wall container 24 into the vacuum container 33, reaches the vicinity of the surface of the multilayer film 16, and reacts with the surface of the multilayer film 16.
- TaF X is a positive number
- carbon and hydrogen in the resist mask layer 10 made of an organic compound also react with fluorine ions and radicals in the plasma, carbon ions and radicals, and become molecules such as CF 4 , HF, and C 2 H 4. And exhausted.
- CF 4 is in equilibrium with the etching gas, the generation rate is slow, and since carbon forms a polymer on the surface of the resist mask layer 10, TaF X is more likely to occur.
- the Ta film 9 is preferentially removed and processed into a pattern of the resist mask layer 10, and a part of the resist mask layer 10 remains on the surface of the Ta film 9a [Step 3 in FIG. 1].
- the Ta film of the Ni—Fe layer 8 which is the lower layer of the Ta film 9a in a state where the resist mask layer 10a is formed on the Ta film 9a patterned in a predetermined pattern by the first etching process. A region where 9a is not formed is exposed.
- the etching apparatus of FIG. 3 includes a controller that controls each component such as the exhaust system 21, the temperature control mechanism 32, the gas introduction system 23, and the plasma high-frequency power source 27.
- a predetermined etching operation (for example, a first etching process, a second etching process, etc.) can be continuously performed according to a predetermined program. Further, the controller can perform a cleaning process in addition to the etching operation according to a predetermined program.
- the resist mask layer 10a remaining on the surface of the Ta film 9a patterned in a predetermined pattern is removed (step S102 in FIG. 2).
- the multilayer film 16 is exhausted while being placed as it is, and the etching gas is switched to the etching gas for the second etching step and introduced. Two etching steps are carried out continuously.
- a gas having a higher etching rate with respect to the resist mask layer 10a than the Ta film 9 and the exposed Ni—Fe layer 8 is used as an etching gas, specifically, for example, oxygen gas.
- the cylinder 23c is switched to a cylinder storing oxygen gas as an etching gas for removing the resist mask layer 10a, and a controller (not shown) controls the exhaust system 21 to exhaust the vacuum container 33,
- the introduction system 23 is controlled to introduce oxygen gas as an etching gas in the second etching process into the vacuum vessel 33.
- the plasma is generated as described above, whereby the resist mask layer 10a remaining on the Ta film 9a reacts with oxygen ions and radicals in the plasma, and CO X It is vaporized and removed as [step 4 in FIG. 1].
- the exposed surface of the Ni—Fe layer 8 is also physically etched by collision with ions in the plasma, and a part of the surface is removed.
- the controller controls the exhaust system 21 to exhaust the inside of the vacuum vessel 33. Then, a part of the material of the etched Ni—Fe layer 8 is exhausted as particles, but a part adheres to the inner wall of the vacuum vessel 33 and remains in the vacuum vessel 33.
- the second etching step (removal of the resist mask layer) is performed.
- the substance removed by the etching gas (oxygen gas) in the step) is vaporized and discharged, and the substance does not adhere to the vacuum vessel 33. That is, in the present embodiment, by using an organic compound as the resist mask layer 10a and using oxygen gas as the etching gas, the resist mask layer 10a to be removed does not become a source of deposits to be removed by cleaning. Can be.
- step S103: NO the next substrate on which the resist mask layer 10 is formed is carried into the etching apparatus as shown in FIG. The first and second etching steps are performed again.
- step S104 the controller performs the cleaning process without introducing the multilayer film 16 into the vacuum vessel 33 (step S104).
- the cleaning timing can be arbitrarily set. For example, the cleaning timing is performed every several tens of dry etching processes.
- a cleaning gas containing hydrogen gas and oxygen gas is introduced into the vacuum vessel 33, and the plasma high frequency power supply 27 is operated to generate plasma. That is, the cylinder 23c is switched to a cylinder in which cleaning gas containing cleaning oxygen and hydrogen as elements is stored, and the controller controls the gas introduction system 23 to introduce the cleaning gas into the vacuum container 33, thereby generating a high-frequency plasma.
- the power source 27 is controlled to form a cleaning gas plasma in the vacuum chamber 33. Deposits adhering to the inside of the vacuum container 33 and the dielectric container 24 are removed by the cleaning gas plasma thus generated.
- the substrate holder 20 can be cleaned at a higher speed by operating the high-frequency power source 30 for bias.
- the multilayer film 16 is not introduced, but the damage to the substrate holder 20 is reduced by performing the cleaning in a state where the substrate S (dummy substrate) in which no film is formed is introduced. be able to. Of course, cleaning may be performed without a dummy substrate.
- the cleaning gas is not limited to a mixed gas of hydrogen gas and oxygen gas as long as it contains oxygen and hydrogen as elements, and may further contain an inert gas.
- O 3 or H 2 O water
- a gas such as alcohol can also be used, but it is preferable to use a gas that does not contain carbon because carbon tends to adhere to the chamber wall and the like and may cause particles.
- the flow rate ratio is not particularly limited, but it is preferable that the ratio of O and H in the cleaning gas is in the range of about 3: 7 to 7: 3 because hydroxide is generated. When there is too much content of O, it will become an oxide and there exists a possibility that it cannot exhaust as a vapor
- the Ni—Fe layer 8 is vaporized as NiOH, Fe (OH) 2 X, etc., and exhausted.
- Other magnetic materials for example, those added with elements such as Co, Fe, Ni, and alloys thereof, and B and C
- the present invention can also be applied to the manufacture of a GMR element using a nonmagnetic conductive layer such as Cu instead of the insulating layer 6.
- the cleaning after removing the resist mask layer in the manufacture of the magnetoresistive effect element has been described.
- the cleaning of the present invention can be applied to other elements.
- an etching process (the first step in FIG. 2) is performed when removing the resist mask layer.
- Cleaning (removal) of deposits for example, Ni—Fe etched from the Ni—Fe layer 8 in FIG. 1) generated in the vacuum chamber as the processing chamber and occurring in the etching chamber in a short time. is important.
- the element to be manufactured is not limited to the magnetoresistive element described above, and any GMR (Giant Magneto-Resistance) element or vertical element can be used as long as it is a multilayer film for which a predetermined pattern is formed by a resist mask layer. It may be a magnetic storage medium or the like.
- the cleaning gas plasma according to the present invention it is necessary for the cleaning gas plasma according to the present invention to remove the deposits in the vacuum vessel generated in the etching process for removing the resist mask layer (for example, the second etching process).
- the deposit may be a material generated by etching the exposed layer in the second etching step, or may be a material generated by etching the resist mask layer. There will be things. Alternatively, the deposit may be both. Therefore, in the present invention, deposits generated in at least one of the resist mask layer and the exposed layer by the etching process for removing the resist mask layer are adhered to the vacuum container according to the present invention. It is vaporized by plasma.
- the deposit generated in the etching process for removing the resist mask layer is caused by dry etching treatment from at least one of the resist mask layer and the exposed layer.
- the material of the layer that adheres to the inside of the vacuum vessel by the etching process and becomes a deposit is a material that vaporizes the deposit by the cleaning gas plasma according to the present invention.
- the layer exposed during the etching process for removing the resist mask layer (For example, the Ni—Fe layer 8 in step 3 of FIG. 1) needs to be a material that can be vaporized by the plasma of the cleaning gas according to the present invention.
- the horizontal axis represents the number of times of cleaning, and indicates the number of times the process of discharging and exhausting the cleaning time after introducing the cleaning gas was repeated. Further, the left side of the vertical axis is a value obtained by measuring the amount of plasma emission of the cleaning gas in the vacuum container 33, and the right side is a change amount (%) for each sheet.
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Abstract
Description
真空容器33内を排気系21によって排気し、ゲートバルブ(不図示)を開けて、図1の工程2にて形成された積層構成を有する多層膜16を真空容器33内に搬入し、基板ホルダー20に保持し、温度制御機構32により所定の温度に維持する。
次に、ガス導入系23を動作させ、第1エッチング工程に係るエッチングガスとしてCF4ガスを含むガスを溜めているボンベ23cから配管23b、バルブ23a,23d,23f、流量調整器23eを介して、所定の流量のエッチングガス(CF4)を真空容器33内に導入する。導入されたエッチングガスは、真空容器33内を経由して誘電体壁容器24内に拡散する。ここで、真空容器33内にプラズマを発生させる。また、排気系21も作動させる。
このように、クリーニングガスとして酸素及び水素を元素として含むガスを用いることで、クリーニング工程に係る時間を短縮化でき、磁気抵抗素子の生産性を向上できる。
なお、上記実施形態では、TMR素子の場合について説明したが、絶縁層6の代わりにCuなどの非磁性導電層を用いたGMR素子の製造においても本発明を適用できる。
次に、本発明の効果を確認すべく行った試験を説明する。
本試験では、図3に示すエッチング装置を用い、第2エッチング工程を所定回数行った後、クリーニング工程を実施した。実施例及び比較例1,2のクリーニング工程の条件は以下の通りである。
クリーニング時間(ガス導入後、放電させる時間):180秒
O2ガスの流量/H2ガスの流量:70sccm/30sccm
プラズマ用電力/バイアス用電力(プラズマ用高周波電源27の電力/バイアス用高周波電源30の電力):2500W/200W
真空容器33内の圧力:0.7Pa
O2ガスの流量:100sccm
その他の条件は、実施例と同じである。
O2ガスの流量/CF4ガスの流量:70sccm/30sccm
その他の条件は、実施例と同じである。
このことから、実施例がクリーニング工程として効果的であることがわかった。
Claims (5)
- 酸素及び水素を元素として含むクリーニングガスのプラズマを形成し、磁性膜の加工処理によりチャンバ内に付着した前記磁性膜を構成する金属膜を除去するクリーニング工程を有することを特徴とする磁性膜加工チャンバのクリーニング方法。
- 前記クリーニングガスは、水素ガスと酸素ガスとを含むことを特徴とする請求項1に記載の磁性膜加工チャンバのクリーニング方法。
- 少なくとも磁性層を含む磁性多層膜に対する加工処理の合間に、処理室から前記磁性多層膜を退避させた状態で、前記処理室内に酸素及び水素を元素として含むクリーニングガスのプラズマを形成し、加工処理により生じた処理室への付着物を除去するクリーニング工程を有することを特徴とする磁性素子の製造方法。
- 前記クリーニングガスは、水素ガスと酸素ガスを含むことを特徴とする請求項3に記載の磁性素子の製造方法。
- ドライエッチング処理を実行可能な基板処理装置であって、
処理室と、
前記処理室内にプラズマを発生させるプラズマ発生手段と、
前記処理室内に、酸素および水素を元素として含むクリーニングガスを導入するガス導入手段と、
前記ドライエッチング処理の後の前記処理室内のクリーニングにおいて、前記処理室内に前記クリーニングガスを導入し、該クリーニングガスのプラズマを生成するように前記プラズマ発生手段および前記ガス導入手段を制御する制御手段と
を備えることを特徴とする基板処理装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2010800032712A CN102224610A (zh) | 2009-01-21 | 2010-01-21 | 磁性膜加工室的清洁方法、磁性器件的制造方法及基板处理设备 |
JP2010547510A JPWO2010084909A1 (ja) | 2009-01-21 | 2010-01-21 | 磁性膜加工チャンバのクリーニング方法、磁性素子の製造方法、および基板処理装置 |
US13/069,635 US20110308544A1 (en) | 2009-01-21 | 2011-03-23 | Cleaning method of processing chamber of magnetic film, manufacturing method of magnetic device, and substrate treatment apparatus |
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Cited By (4)
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US20130048599A1 (en) * | 2011-08-30 | 2013-02-28 | Makoto Satake | Plasma etching method |
KR101266053B1 (ko) * | 2011-12-07 | 2013-05-21 | 가부시키가이샤 히다치 하이테크놀로지즈 | 플라즈마 처리 방법 |
JP2013161912A (ja) * | 2012-02-03 | 2013-08-19 | Hitachi Kokusai Electric Inc | 半導体装置の製造方法、基板処理装置及び基板処理方法 |
JP2015160192A (ja) * | 2014-02-28 | 2015-09-07 | サムコ株式会社 | プラズマ洗浄装置 |
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US20140061827A1 (en) * | 2012-08-29 | 2014-03-06 | Headway Technologies, Inc. | Metal Protection Layer over SiN Encapsulation for Spin-Torque MRAM Device Applications |
KR102138729B1 (ko) * | 2012-10-30 | 2020-07-28 | 도쿄엘렉트론가부시키가이샤 | 에칭 처리 방법 및 기판 처리 장치 |
US9142392B2 (en) * | 2013-04-29 | 2015-09-22 | Varian Semiconductor Equipment Associates, Inc. | Self-cleaning radio frequency plasma source |
US10249479B2 (en) * | 2015-01-30 | 2019-04-02 | Applied Materials, Inc. | Magnet configurations for radial uniformity tuning of ICP plasmas |
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- 2010-01-21 WO PCT/JP2010/050704 patent/WO2010084909A1/ja active Application Filing
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US20130048599A1 (en) * | 2011-08-30 | 2013-02-28 | Makoto Satake | Plasma etching method |
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JP2015160192A (ja) * | 2014-02-28 | 2015-09-07 | サムコ株式会社 | プラズマ洗浄装置 |
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US20110308544A1 (en) | 2011-12-22 |
JPWO2010084909A1 (ja) | 2012-07-19 |
CN102224610A (zh) | 2011-10-19 |
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