Patents by Inventor Tadashi Kawashima
Tadashi Kawashima 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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Publication number: 20240220174Abstract: A processing system includes a support table with a support surface to support a processing target and including a type mark that includes information on a type of processing, and a controller configured or programmed to include a storage to store a processing image showing contents of processing for each type of processing, an acquirer to acquire a captured image of the support surface including the type mark, an identifier to identify the type of processing included in the type mark in the captured image, a processing image acquirer to acquire a processing image corresponding to the type of processing identified by the identifier as an identified processing image, and a display controller to display the captured image and the identified processing image in an overlapping manner.Type: ApplicationFiled: December 20, 2023Publication date: July 4, 2024Inventors: Shinya YAMAMOTO, Tadashi KAWASHIMA, Motohiro IKEMURA, Hikaru HASEGAWA
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Patent number: 11462409Abstract: An epitaxial silicon wafer includes: a silicon wafer doped with phosphorus as a dopant and having an electrical resistivity of less than 1.0 m ?·cm; and an epitaxial film formed on the silicon wafer. The silicon wafer includes: a main surface to which a (100) plane is inclined; and a [100] axis that is perpendicular to the (100) plane and inclined at an angle ranging from 0°30? to 0°55? in any direction with respect to an axis perpendicular to the main surface. The epitaxial silicon wafer has at most 1/cm2 of a density of a hillock defect generated thereon.Type: GrantFiled: August 7, 2017Date of Patent: October 4, 2022Assignee: SUMCO CORPORATIONInventors: Naoya Nonaka, Tadashi Kawashima, Katsuya Ookubo
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Patent number: 10867791Abstract: A manufacturing method of an epitaxial silicon wafer uses a silicon wafer containing phosphorus, having a resistivity of less than 1.0 m?·cm. The silicon wafer has a main surface to which a (100) plane is inclined and a [100] axis that is perpendicular to the (100) plane and inclined at an angle ranging from 0°5? to 0°25? with respect to an axis orthogonal to the main surface. The manufacturing method includes: annealing the silicon wafer at a temperature from 1200 degrees C. to 1220 degrees C. for 30 minutes or more under argon gas atmosphere (argon-annealing step); etching a surface of the silicon wafer (prebaking step); and growing the epitaxial film at a growth temperature ranging from 1100 degrees C. to 1165 degrees C. on the surface of the silicon wafer (epitaxial film growth step).Type: GrantFiled: March 28, 2018Date of Patent: December 15, 2020Assignee: SUMCO CORPORATIONInventors: Naoya Nonaka, Tadashi Kawashima, Kenichi Mizogami
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Publication number: 20200027727Abstract: A manufacturing method of an epitaxial silicon wafer uses a silicon wafer containing phosphorus, having a resistivity of less than 1.0 m?·cm. The silicon wafer has a main surface to which a (100) plane is inclined and a [100] axis that is perpendicular to the (100) plane and inclined at an angle ranging from 0°5? to 0°25? with respect to an axis orthogonal to the main surface. The manufacturing method includes: annealing the silicon wafer at a temperature from 1200 degrees C. to 1220 degrees C. for 30 minutes or more under argon gas atmosphere (argon-annealing step); etching a surface of the silicon wafer (prebaking step); and growing the epitaxial film at a growth temperature ranging from 1100 degrees C. to 1165 degrees C. on the surface of the silicon wafer (epitaxial film growth step).Type: ApplicationFiled: March 28, 2018Publication date: January 23, 2020Applicant: SUMCO CORPORATIONInventors: Naoya NONAKA, Tadashi KAWASHIMA, Kenichi MIZOGAMI
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Publication number: 20190181007Abstract: An epitaxial silicon wafer includes: a silicon wafer doped with phosphorus as a dopant and having an electrical resistivity of less than 1.0 m ?·cm; and an epitaxial film formed on the silicon wafer. The silicon wafer includes: a main surface to which a (100) plane is inclined; and a [100] axis that is perpendicular to the (100) plane and inclined at an angle ranging from 0°30? to 0°55? in any direction with respect to an axis perpendicular to the main surface. The epitaxial silicon wafer has at most 1/cm2 of a density of a hillock defect generated thereon.Type: ApplicationFiled: August 7, 2017Publication date: June 13, 2019Applicant: SUMCO CORPORATIONInventors: Naoya NONAKA, Tadashi KAWASHIMA, Katsuya OOKUBO
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Patent number: 10253429Abstract: A method includes: a step of forming an oxide film on a backside of a silicon wafer; a step of removing the oxide film present at an outer periphery of the silicon wafer; a step of argon annealing in which a heat treatment is performed in an argon gas atmosphere; and a step of forming an epitaxial film on a surface of the silicon wafer, the step of forming the epitaxial film including: a step of pre-baking in which the silicon wafer is subjected to a heat treatment in an gas atmosphere containing hydrogen and hydrogen chloride to etch an outer layer of the silicon wafer; and a step of growing the epitaxial film on the surface of the silicon wafer.Type: GrantFiled: April 5, 2016Date of Patent: April 9, 2019Assignee: SUMCO CORPORATIONInventors: Naoya Nonaka, Tadashi Kawashima
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Patent number: 10005196Abstract: A cutting apparatus includes a first motor to move a carriage, a second motor to cause a cutter to approach a work material, and a controller configured or programmed to control the first motor and the second motor. The controller includes a load detector to detect a load of the first motor, a storage storing a first relationship between the load of the first motor and a supply signal to the second motor, and a cutting pressure controller configured or programmed to control a cutting pressure applied from the cutter to the work material based on the first relationship and the load of the first motor detected by the load detector.Type: GrantFiled: September 1, 2016Date of Patent: June 26, 2018Assignee: ROLAND DG CORPORATIONInventors: Shinya Yamamoto, Takeshi Tozuka, Yuichi Kitagawa, Tadashi Kawashima
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Publication number: 20180087184Abstract: A method includes: a step of forming an oxide film on a backside of a silicon wafer; a step of removing the oxide film present at an outer periphery of the silicon wafer; a step of argon annealing in which a heat treatment is performed in an argon gas atmosphere; and a step of forming an epitaxial film on a surface of the silicon wafer, the step of forming the epitaxial film including: a step of pre-baking in which the silicon wafer is subjected to a heat treatment in an gas atmosphere containing hydrogen and hydrogen chloride to etch an outer layer of the silicon wafer; and a step of growing the epitaxial film on the surface of the silicon wafer.Type: ApplicationFiled: April 5, 2016Publication date: March 29, 2018Applicant: SUMCO CORPORATIONInventors: Naoya NONAKA, Tadashi KAWASHIMA
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Patent number: 9902165Abstract: In an ink supply system, a main ink tank and an ink head are connected together via a main supply channel. A sub-ink tank is connected to the main supply channel via a sub-supply channel. An upstream-side valve is provided on an upstream-side portion of the main supply channel. During standby, a first standby setting processor of a controller sets a first standby state in which a first upstream-side valve is open, and a second standby setting processor sets a second standby state in which the first upstream-side valve is closed. A standby state determination processor determines whether or not the amount of time elapsed from when a setting operation was done by the first standby setting processor or the second standby setting processor is greater than or equal to a first amount of time. The standby state switching processor switches between the first standby state and the second standby state when it is determined that the elapsed time is greater than or equal to the first amount of time.Type: GrantFiled: March 16, 2017Date of Patent: February 27, 2018Assignee: ROLAND DG CORPORATIONInventors: Tadashi Kawashima, Yasuhiko Kobayashi, Takefumi Endo, Yusuke Takano, Teppei Sawada
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Publication number: 20170274668Abstract: In an ink supply system, a main ink tank and an ink head are connected together via a main supply channel. A sub-ink tank is connected to the main supply channel via a sub-supply channel. An upstream-side valve is provided on an upstream-side portion of the main supply channel. During standby, a first standby setting processor of a controller sets a first standby state in which a first upstream-side valve is open, and a second standby setting processor sets a second standby state in which the first upstream-side valve is closed. A standby state determination processor determines whether or not the amount of time elapsed from when a setting operation was done by the first standby setting processor or the second standby setting processor is greater than or equal to a first amount of time. The standby state switching processor switches between the first standby state and the second standby state when it is determined that the elapsed time is greater than or equal to the first amount of time.Type: ApplicationFiled: March 16, 2017Publication date: September 28, 2017Inventors: Tadashi KAWASHIMA, Yasuhiko KOBAYASHI, Takefumi ENDO, Yusuke TAKANO, Teppei SAWADA
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Patent number: 9755022Abstract: An epitaxial silicon wafer includes a silicon wafer added with phosphorus so that resistivity of the silicon wafer falls at or below 0.9 m?·cm, an epitaxial film formed on a first side of the silicon wafer, and an oxidation film formed on a second side of the silicon wafer opposite to the first side, wherein an average number of Light Point Defect of a size of 90 nm or more observed on a surface of the epitaxial film is one or less per square centimeter.Type: GrantFiled: September 10, 2015Date of Patent: September 5, 2017Assignees: SUMCO TECHXIV CORPORATION, SUMCO CORPORATIONInventors: Tadashi Kawashima, Naoya Nonaka, Masayuki Shinagawa, Gou Uesono
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Publication number: 20170066152Abstract: A cutting apparatus includes a first motor to move a carriage, a second motor to cause a cutter to approach a work material, and a controller configured or programmed to control the first motor and the second motor. The controller includes a load detector to detect a load of the first motor, a storage storing a first relationship between the load of the first motor and a supply signal to the second motor, and a cutting pressure controller configured or programmed to control a cutting pressure applied from the cutter to the work material based on the first relationship and the load of the first motor detected by the load detector.Type: ApplicationFiled: September 1, 2016Publication date: March 9, 2017Inventors: Shinya YAMAMOTO, Takeshi TOZUKA, Yuichi KITAGAWA, Tadashi KAWASHIMA
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Patent number: 9425264Abstract: A method includes: a backside-oxidation-film-formation step in which an oxidation film is formed on a backside of a silicon wafer; a backside-oxidation-film-removal step in which the oxidation film provided at an outer periphery of the silicon wafer is removed; an argon-annealing step in which the silicon wafer after the backside-oxidation-film-removal step is subjected to a heat treatment in an argon gas atmosphere at a temperature in a range from 1200 to 1220 degrees C. for 60 minutes or more and 120 minutes or less; and an epitaxial-film-formation step in which an epitaxial film is formed on a surface of the silicon wafer after the argon-annealing step.Type: GrantFiled: June 24, 2013Date of Patent: August 23, 2016Assignees: SUMCO CORPORATION, SUMCO TECHXIV CORPORATIONInventors: Tadashi Kawashima, Naoya Nonaka, Masayuki Shinagawa, Gou Uesono
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Publication number: 20150380493Abstract: An epitaxial silicon wafer includes a silicon wafer added with phosphorus so that resistivity of the silicon wafer falls at or below 0.9 m?·cm, an epitaxial film formed on a first side of the silicon wafer, and an oxidation film formed on a second side of the silicon wafer opposite to the first side, wherein an average number of Light Point Defect of a size of 90 nm or more observed on a surface of the epitaxial film is one or less per square centimeter.Type: ApplicationFiled: September 10, 2015Publication date: December 31, 2015Applicants: SUMCO CORPORATION, SUMCO TECHXIV CORPORATIONInventors: Tadashi KAWASHIMA, Naoya NONAKA, Masayuki SHINAGAWA, Gou UESONO
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Patent number: 8956927Abstract: A method of manufacturing an epitaxial silicon wafer including a silicon wafer having a surface added with phosphorus and an epitaxial film provided on the surface includes adjusting an in-plane thickness distribution of the epitaxial film formed on the surface of the silicon wafer based on an in-plane resistivity distribution of the silicon wafer before an epitaxial growth treatment.Type: GrantFiled: June 13, 2013Date of Patent: February 17, 2015Assignee: Sumco Techxiv CorporationInventors: Tadashi Kawashima, Naoya Nonaka
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Patent number: 8659020Abstract: It is an object to provide an epitaxial silicon wafer that is provided with an excellent gettering ability in which a polysilicon layer is formed on the rear face side of a silicon crystal substrate into which phosphorus (P) and germanium (Ge) have been doped. A silicon epitaxial layer is grown by a CVD method on the surface of a silicon crystal substrate into which phosphorus and germanium have been doped at a high concentration. After that, a PBS forming step for growing a polysilicon layer is executed on the rear face side of a silicon crystal substrate. By the above steps, the number of LPDs (caused by an SF) that occur on the surface of the epitaxial silicon wafer due to the SF can be greatly reduced.Type: GrantFiled: May 28, 2010Date of Patent: February 25, 2014Assignee: Sumco CorporationInventors: Tadashi Kawashima, Masahiro Yoshikawa, Akira Inoue, Yoshiya Yoshida
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Publication number: 20140001605Abstract: A method includes: a backside-oxidation-film-formation step in which an oxidation film is formed on a backside of a silicon wafer; a backside-oxidation-film-removal step in which the oxidation film provided at an outer periphery of the silicon wafer is removed; an argon-annealing step in which the silicon wafer after the backside-oxidation-film-removal step is subjected to a heat treatment in an argon gas atmosphere at a temperature in a range from 1200 to 1220 degrees C. for 60 minutes or more and 120 minutes or less; and an epitaxial-film-formation step in which an epitaxial film is formed on a surface of the silicon wafer after the argon-annealing step.Type: ApplicationFiled: June 24, 2013Publication date: January 2, 2014Inventors: Tadashi Kawashima, Naoya Nonaka, Masayuki Shinagawa, Gou Uesono
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Publication number: 20130337638Abstract: A method of manufacturing an epitaxial silicon wafer including a silicon wafer having a surface added with phosphorus and an epitaxial film provided on the surface includes adjusting an in-plane thickness distribution of the epitaxial film formed on the surface of the silicon wafer based on an in-plane resistivity distribution of the silicon wafer before an epitaxial growth treatment.Type: ApplicationFiled: June 13, 2013Publication date: December 19, 2013Inventors: Tadashi KAWASHIMA, Naoya NONAKA
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Patent number: 8420514Abstract: It is an object to provide an epitaxial silicon wafer that is provided with an excellent gettering ability in which a polysilicon layer is formed on the rear face side of a silicon crystal substrate into which phosphorus (P) and germanium (Ge) have been doped. A PBS forming step for growing a polysilicon layer is executed on the rear face side of a silicon crystal substrate into which phosphorus and germanium have been doped at a high concentration to execute a baking treatment. After a surface layer of the silicon crystal substrate is then polished up to a predetermined amount, a silicon epitaxial layer is grown by a CVD method. By the above steps, the number of LPDs (caused by an SF) that occur on the surface of the epitaxial silicon wafer due to the SF can be greatly reduced.Type: GrantFiled: July 1, 2010Date of Patent: April 16, 2013Assignee: Sumco CorporationInventors: Tadashi Kawashima, Masahiro Yoshikawa, Akira Inoue, Yoshiya Yoshida, Kazuhiro Iriguchi, Toshiyuki Isami
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Publication number: 20120112190Abstract: It is an object to provide an epitaxial silicon wafer that is provided with an excellent gettering ability in which a polysilicon layer is formed on the rear face side of a silicon crystal substrate into which phosphorus (P) and germanium (Ge) have been doped. A silicon epitaxial layer is grown by a CVD method on the surface of a silicon crystal substrate into which phosphorus and germanium have been doped at a high concentration. After that, a PBS forming step for growing a polysilicon layer is executed on the rear face side of a silicon crystal substrate. By the above steps, the number of LPDs (caused by an SF) that occur on the surface of the epitaxial silicon wafer due to the SF can be greatly reduced.Type: ApplicationFiled: May 28, 2010Publication date: May 10, 2012Applicant: SUMCO CORPORATIONInventors: Tadashi Kawashima, Masahiro Yoshikawa, Akira Inoue, Yoshiya Yoshida