Patents by Inventor Toru Kitada
Toru Kitada has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11894222Abstract: A film forming apparatus for forming a film on a substrate by using a magnetron sputtering method. The film forming apparatus includes: a substrate holder configured to hold a substrate; a target holder configured to hold a target made of a ferromagnetic material to face the substrate holder; a magnet provided on a surface of the target holder opposite to the substrate holder, and configured to leak a magnetic field to a front surface of the target held by the target holder that is a surface close to the substrate holder; and a magnetic field strength measurement device configured to measure a strength of the magnetic field.Type: GrantFiled: June 22, 2021Date of Patent: February 6, 2024Assignee: TOKYO ELECTRON LIMITEDInventors: Atsushi Takeuchi, Toru Kitada, Kanto Nakamura, Atsushi Gomi
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Publication number: 20240021423Abstract: There is a film forming apparatus comprising: a first holder holding a first target formed of a first material; a second holder holding a second target formed of a second material different from the first material; and a mounting table holding a substrate, the mounting table rotatable with a central axis of the mounting table as a rotation axis, wherein a distance from the central axis of the mounting table to a center of a sputter surface of the first target is different from a distance from the central axis of the mounting table to a center of a sputter surface of the second target.Type: ApplicationFiled: July 11, 2023Publication date: January 18, 2024Inventors: Yasuhiko KOJIMA, Shota ISHIBASHI, Toru KITADA
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Publication number: 20230175112Abstract: There is a method for forming a film including an alloy film containing multiple types of elements on a surface of a substrate using a film forming target made of the alloy film, comprising: (a) arranging the film forming target and a distribution improvement target; and (b) forming the film on the substrate by simultaneously or alternately sputtering the film forming target and the distribution improvement target, wherein the distribution improvement target is made of a distribution improvement film containing a non-uniform element among the multiple types of elements, and in step (b), a larger amount of the non-uniform element sputtered from the distribution improvement target is supplied to a portion where the distribution amount of the non-uniform element is small compared to a portion where the distribution amount of the non-uniform element is large when the film is formed on the substrate by the film forming target.Type: ApplicationFiled: December 6, 2022Publication date: June 8, 2023Inventors: Shota ISHIBASHI, Toru KITADA
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Publication number: 20230175114Abstract: A sputtering apparatus includes: a processing container; a first target provided inside the processing container and formed of a first material; a second target provided inside the processing container and formed of a second material different from the first material; a stage provided inside the processing container to place a substrate thereon; a shielding plate arranged between the first target and the second target; and a controller, wherein the controller is configured to perform a process of reducing a film stress of a film formed on the shielding plate.Type: ApplicationFiled: December 7, 2022Publication date: June 8, 2023Inventors: Shota ISHIBASHI, Toru KITADA
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Publication number: 20230011226Abstract: There is provided a film thickness measurement method which measures a film thickness of a specific film to be measured in a multilayer film in situ in a film formation system that forms the multilayer film on a substrate, the method comprising: regarding a plurality of films located under the film to be measured as one underlayer film, measuring a film thickness of the underlayer film, and deriving an optical constant of the underlayer film by spectroscopic interferometry; and after the film to be measured is formed, deriving a film thickness of the film to be measured by spectroscopic interferometry using the film thickness and the optical constant of the underlayer film.Type: ApplicationFiled: June 29, 2022Publication date: January 12, 2023Inventors: Kazunaga ONO, Kanto NAKAMURA, Toru KITADA, Atsushi GOMI
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Publication number: 20230005989Abstract: A film forming apparatus for forming a laminated structure on a substrate to form a magnetic tunnel junction element is disclosed. The film forming apparatus comprises: a plurality of processing chambers where a magnetic layer and an insulating layer are formed on the substrate; a heat treatment chamber where a magnetic field is applied to the substrate to perform heat treatment; a vacuum transfer chamber that connects the processing chambers and the heat treatment chamber; and a controller.Type: ApplicationFiled: June 30, 2022Publication date: January 5, 2023Inventors: Keisuke SATO, Toru KITADA, Atsushi GOMI, Kanto NAKAMURA
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Publication number: 20220415634Abstract: A film forming apparatus for forming a film by magnetron sputtering includes a substrate support supporting the substrate, a holder holding a target for emitting sputtered particles, a magnet unit having a magnet, first and second movement mechanisms configured to periodically move the substrate support and the magnet unit, respectively, and a controller. The controller is configured to control the first movement mechanism and the second movement mechanism so that a phase in a periodic movement of the substrate support remains the same at a start of film formation and at an end of film formation, a phase in a periodic movement of the magnet unit remains the same at a start of film formation and at an end of film formation, and the phase in the periodic movement of the substrate support and the phase in the periodic movement of the magnet unit do not match during film formation.Type: ApplicationFiled: June 17, 2022Publication date: December 29, 2022Inventors: Kenichi Imakita, Hiroaki Chihaya, Toru Kitada, Atsushi Gomi
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Publication number: 20220403503Abstract: A film forming apparatus for forming a metal oxide film on a substrate, includes: a substrate support part configured to support the substrate; a heating mechanism configured to heat the substrate supported by the substrate support part; a processing container in which the substrate support part is provided; a holder configured to hold a metal material target inside the processing container and connected to a power source; a gas supply part configured to supply an oxygen gas into the processing container; and a controller, wherein the controller is configured to control the heating mechanism, the power source, and the gas supply part so as to execute alternately and repeatedly: forming a predetermined film on the substrate inside the processing container by reactive sputtering in a metal mode; and forming a target metal oxide film by causing the predetermined film to react with an oxygen gas inside the processing container.Type: ApplicationFiled: June 14, 2022Publication date: December 22, 2022Inventors: Hiroyuki Iwashita, Toru Kitada, Atsushi Shimada
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Publication number: 20220098717Abstract: A film forming apparatus according to the present invention comprises: a processing chamber; a substrate holder for holding a substrate within the processing chamber; a target electrode, disposed above the substrate holder, for holding a metal target and supplying electrical power from a power source to the target; an oxidizing gas introduction mechanism for supplying an oxidizing gas to the substrate; and a gas supply unit for supplying an inert gas to the space where the target is disposed. Constituent metal is discharged from the target in the form of sputter particles, whereby a metal film is deposited on the substrate, and the metal film is oxidized by the oxidizing gas introduced by the oxidizing gas introduction mechanism, thereby forming a metal oxide film. When the oxidizing gas is introduced, the gas supply unit supplies the inert gas to the space where the target is disposed so that the pressure therein is positive with respect to the pressure in a processing space.Type: ApplicationFiled: September 20, 2019Publication date: March 31, 2022Inventors: Kenichi IMAKITA, Kazunaga ONO, Toru KITADA, Keisuke SATO, Atsushi GOMI, Hiroyuki YOKOHARA, Hiroshi SONE
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Publication number: 20210407779Abstract: A film forming apparatus for forming a film on a substrate by using a magnetron sputtering method. The film forming apparatus includes: a substrate holder configured to hold a substrate; a target holder configured to hold a target made of a ferromagnetic material to face the substrate holder; a magnet provided on a surface of the target holder opposite to the substrate holder, and configured to leak a magnetic field to a front surface of the target held by the target holder that is a surface close to the substrate holder; and a magnetic field strength measurement device configured to measure a strength of the magnetic field.Type: ApplicationFiled: June 22, 2021Publication date: December 30, 2021Inventors: Atsushi TAKEUCHI, Toru KITADA, Kanto NAKAMURA, Atsushi GOMI
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Patent number: 10309005Abstract: A deposition device according to one embodiment includes a processing container. A mounting table is installed inside the processing container, and a metal target is installed above the mounting table. Further, a head is configured to inject an oxidizing gas toward the mounting table. This head is configured to move between a first region that is defined between the metal target and a mounting region where a target object is mounted on the mounting table and a second region spaced apart from a space defined between the metal target and the mounting region.Type: GrantFiled: August 28, 2014Date of Patent: June 4, 2019Assignee: TOKYO ELECTRON LIMITEDInventors: Yasuhiko Kojima, Hiroshi Sone, Atsushi Gomi, Kanto Nakamura, Toru Kitada, Yasunobu Suzuki, Yusuke Suzuki, Koichi Takatsuki, Tatsuo Hirasawa, Keisuke Sato, Chiaki Yasumuro, Atsushi Shimada
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Publication number: 20170317273Abstract: A method for forming a perpendicular magnetization type magnetic tunnel junction element includes forming a tunnel barrier layer on a first magnetic layer of a workpiece, cooling the workpiece on which the tunnel barrier layer is formed, and forming a second magnetic layer on the tunnel barrier layer after the cooling.Type: ApplicationFiled: July 18, 2017Publication date: November 2, 2017Inventors: Toru KITADA, Kanto NAKAMURA, Atsushi GOMI, Shinji FURUKAWA, Yusuke SUZUKI
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Patent number: 9790590Abstract: The present disclosure provides a vacuum-processing apparatus for forming a metal film on a substrate by sputtering targets with ions of plasma, and then oxidizing the metal film, the apparatus including: a first target composed of a material having a property of adsorbing oxygen; a second target composed of a metal; a power supply unit configured to apply a voltage to the targets; a shutter configured to prevent particles generated from one of the targets from adhering to the other of the targets; a shielding member; an oxygen supply unit configured to supply an oxygen-containing gas to the substrate mounted on the mounting unit; and a control unit configured to perform supplying a plasma-generating voltage to the targets and sputtering the targets and supplying the oxygen-containing gas from the oxygen supply unit to the substrate.Type: GrantFiled: April 30, 2013Date of Patent: October 17, 2017Assignee: TOKYO ELECTRON LIMITEDInventors: Shinji Furukawa, Atsushi Gomi, Tetsuya Miyashita, Toru Kitada, Kanto Nakamura
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Publication number: 20160251746Abstract: A deposition device according to one embodiment includes a processing container. A mounting table is installed inside the processing container, and a metal target is installed above the mounting table. Further, a head is configured to inject an oxidizing gas toward the mounting table. This head is configured to move between a first region that is defined between the metal target and a mounting region where a target object is mounted on the mounting table and a second region spaced apart from a space defined between the metal target and the mounting region.Type: ApplicationFiled: August 28, 2014Publication date: September 1, 2016Inventors: Yasuhiko KOJIMA, Hiroshi SONE, Atsushi GOMI, Kanto NAKAMURA, Toru KITADA, Yasunobu SUZUKI, Yusuke SUZUKI, Koichi TAKATSUKI, Tatsuo HIRASAWA, Keisuke SATO, Chiaki YASUMURO, Atsushi SHIMADA
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Publication number: 20150187549Abstract: To provide technology that can increase the productivity of an apparatus when magnetron sputtering is carried out using a target formed from magnetic material. The present disclosure is an apparatus provided with: a cylindrical body that is a target formed from magnetic material, disposed above a substrate; a rotating mechanism that rotates this cylindrical body around the axis of the cylindrical body; a magnet array provided inside a hollow part of the cylindrical body; and a power supply that applies voltage to the cylindrical body. Furthermore, the magnet array has a cross sectional profile, orthogonal to the axis of the cylindrical body. Thus, even if a target with a comparatively large thickness is used, reductions in the intensity of the magnetic field that leaks from the target can be suppressed, and local progress in erosion can be suppressed.Type: ApplicationFiled: March 28, 2013Publication date: July 2, 2015Inventors: Toru Kitada, Kanto Nakamura, Atsushi Gomi, Tetsuya Miyashita
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Publication number: 20150187546Abstract: The present disclosure provides a vacuum-processing apparatus for forming a metal film on a substrate by sputtering targets with ions of plasma, and then oxidizing the metal film, the apparatus including: a first target composed of a material having a property of adsorbing oxygen; a second target composed of a metal; a power supply unit configured to apply a voltage to the targets; a shutter configured to prevent particles generated from one of the targets from adhering to the other of the targets; a shielding member; an oxygen supply unit configured to supply an oxygen-containing gas to the substrate mounted on the mounting unit; and a control unit configured to perform supplying a plasma-generating voltage to the targets and sputtering the targets and supplying the oxygen-containing gas from the oxygen supply unit to the substrate.Type: ApplicationFiled: April 30, 2013Publication date: July 2, 2015Inventors: Shinji Furukawa, Atsushi Gomi, Tetsuya Miyashita, Toru Kitada, Kanto Nakamura
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Publication number: 20150136596Abstract: A magnetron sputtering apparatus includes a target disposed to face a substrate mounted on a mounting part in a vacuum vessel and a magnet arrangement assembly installed at a back side of the target and having an array of magnets, the magnetron sputtering apparatus including: a gas supply part configured to supply a plasma generation gas into the vacuum vessel; a rotary mechanism configured to rotate the mounting part; a power supply part configured to apply a voltage to the target; a moving mechanism configured to move the magnet arrangement assembly between a first region and a second region; and a control unit configured to output a control signal, such that an average moving speed of the magnet arrangement assembly is different between the first region and the second region.Type: ApplicationFiled: April 11, 2013Publication date: May 21, 2015Applicant: Tokyo Electron LimitedInventors: Kanto Nakamura, Toru Kitada, Atsushi Gomi, Tetsuya Miyashita
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Patent number: 8968538Abstract: A magnetic film having excellent uniformity in in-plane distribution of film thickness or sheet resistance is formed when the film is formed by forming a magnetic field on a processing surface of a substrate (21) and performing oblique incidence sputtering by using high discharge power. A sputtering apparatus (1) is provided with a substrate holder (22) for holding rotatably the substrate (21) in the surface direction of the processing surface of the substrate; a substrate magnetic field forming device (30) which is disposed to surround the substrate (21) and forms a magnetic field on the processing surface of the substrate (21); cathodes (41) which are arranged diagonally above the substrate (21) and are supplied with electric discharge power; a position detecting device (23) for detecting a rotation position of the substrate (21); and a control device (50) which adjusts the rotation speed of the substrate (21) in accordance with the rotation position detected by the position detecting device (23).Type: GrantFiled: September 29, 2009Date of Patent: March 3, 2015Assignee: Canon Anelva CorporationInventors: Toru Kitada, Naoki Watanabe, Motonobu Nagai, Masahiro Suenaga, Takeo Konno
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Patent number: 8906208Abstract: A sputtering apparatus includes a substrate holder which holds a substrate to be rotatable in the plane direction of the processing surface of the substrate, a substrate-side magnet which is arranged around the substrate and forms a magnetic field on the processing surface of the substrate, a cathode which is arranged diagonally above the substrate and receives discharge power, a position detection unit which detects the rotational position of the substrate, and a controller which controls the discharge power in accordance with the rotational position detected by the position detection unit.Type: GrantFiled: May 10, 2011Date of Patent: December 9, 2014Assignee: Canon Anelva CorporationInventors: Toru Kitada, Naoki Watanabe, Motonobu Nagai
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Publication number: 20110223346Abstract: A magnetic film having excellent uniformity in in-plane distribution of film thickness or sheet resistance is formed when the film is formed by forming a magnetic field on a processing surface of a substrate (21) and performing oblique incidence sputtering by using high discharge power. A sputtering apparatus (1) is provided with a substrate holder (22) for holding rotatably the substrate (21) in the surface direction of the processing surface of the substrate; a substrate magnetic field forming device (30) which is disposed to surround the substrate (21) and forms a magnetic field on the processing surface of the substrate (21); cathodes (41) which are arranged diagonally above the substrate (21) and are supplied with electric discharge power; a position detecting device (23) for detecting a rotation position of the substrate (21) ; and a control device (50) which adjusts the rotation speed of the substrate (21) in accordance with the rotation position detected by the position detecting device (23).Type: ApplicationFiled: September 29, 2009Publication date: September 15, 2011Applicant: CANON ANELVA CORPORATIONInventors: Toru Kitada, Naoki Watanabe, Motonobu Nagai, Masahiro Suenaga, Takeo Konno