Patents by Inventor Koji Mahara
Koji Mahara 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: 20240009949Abstract: A die cushion control device for controlling a die cushion mechanism includes: a pressure command generation unit that outputs a first pressure command on pressure or force to be generated between the die cushion mechanism and a slide; a deviation prediction unit that predicts a pressure deviation that is the difference between the pressure or the force in the first pressure command and a detected pressure caused when the die cushion mechanism is controlled according to the first pressure command, and outputs the predicted pressure deviation as a correction pressure command; a pressure command correction unit that corrects the first pressure command with the correction pressure command to calculate a second pressure command; and a pressure control unit that calculates a speed command to cause the detected pressure to follow the second pressure command, and outputs the speed command to a speed control unit.Type: ApplicationFiled: June 4, 2021Publication date: January 11, 2024Applicant: Mitsubishi Electric CorporationInventors: Koichiro UEDA, Koji MAHARA
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Patent number: 8890460Abstract: A servo control device includes a follow-up control unit that controls a control target that drives a mechanical system by a motor, a command function unit that has input therein a phase signal ? indicating a phase of a cyclic operation performed by the control target, and that calculates a machine motion command according to the phase signal ? by a preset first function, a second derivative unit that uses a second function obtained by second-order differentiating the first function with respect to the phase signal to calculate a value of the second function according to the phase signal as a second-order differential base signal, a correction-value computation unit that computes a first command correction value for correcting the motor motion command by using a product of a square value of the phase velocity, the second-order differential base signal, and a first constant, and a correction-value addition unit that calculates the motor motion command based on an added value of the first command correction valType: GrantFiled: October 25, 2012Date of Patent: November 18, 2014Assignee: Mitsubishi Electric CorporationInventors: Hidetoshi Ikeda, Yoshihiro Marushita, Koji Mahara, Kiyoshi Hasegawa, Hidemasa Ogi
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Patent number: 8749257Abstract: A position alignment of a transfer point of a transfer arm is performed by using a position detecting method. The method includes: detecting electrostatic capacitances in relation with a reference object for position alignment by a plurality of electrostatic capacitance detecting electrodes provided on a surface of the substrate body; communicating with each electrostatic capacitance detecting electrode and controlling a detection of each electrostatic capacitance detecting electrode; and calculating coordinates (x, y) of the reference object with respect to the substrate body based on a preset relationship between electrostatic capacitance values of multiple electrostatic capacitance detecting electrodes and a position of the reference object with respect to the substrate body.Type: GrantFiled: February 27, 2012Date of Patent: June 10, 2014Assignee: Tokyo Electron LimitedInventors: Toshiyuki Matsumoto, Tomohide Minami, Yuichi Douki, Koji Mahara
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Publication number: 20140117919Abstract: A servo control device includes a follow-up control unit that controls a control target that drives a mechanical system by a motor, a command function unit that has input therein a phase signal ? indicating a phase of a cyclic operation performed by the control target, and that calculates a machine motion command according to the phase signal ? by a preset first function, a second derivative unit that uses a second function obtained by second-order differentiating the first function with respect to the phase signal to calculate a value of the second function according to the phase signal as a second-order differential base signal, a correction-value computation unit that computes a first command correction value for correcting the motor motion command by using a product of a square value of the phase velocity, the second-order differential base signal, and a first constant, and a correction-value addition unit that calculates the motor motion command based on an added value of the first command correction valType: ApplicationFiled: October 25, 2012Publication date: May 1, 2014Applicant: Mitsubishi Electric CorporationInventors: Hidetoshi Ikeda, Yoshihiro Marushita, Koji Mahara, Kiyoshi Hasegawa, Hidemasa Ogi
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Publication number: 20120158355Abstract: A position alignment of a transfer point of a transfer arm is performed by using a position detecting method. The method includes: detecting electrostatic capacitances in relation with a reference object for position alignment by a plurality of electrostatic capacitance detecting electrodes provided on a surface of the substrate body; communicating with each electrostatic capacitance detecting electrode and controlling a detection of each electrostatic capacitance detecting electrode; and calculating coordinates (x, y) of the reference object with respect to the substrate body based on a preset relationship between electrostatic capacitance values of multiple electrostatic capacitance detecting electrodes and a position of the reference object with respect to the substrate body.Type: ApplicationFiled: February 27, 2012Publication date: June 21, 2012Applicant: TOKYO ELECTRON LIMITEDInventors: Toshiyuki Matsumoto, Tomohide Minami, Yuichi Douki, Koji Mahara
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Patent number: 8149005Abstract: A position alignment of a transfer point of a transfer arm is performed by using a position detecting wafer capable of being loaded into an apparatus having a thin transfer port. The position detecting wafer S includes an electrostatic capacitance detecting sensor 50 for detecting an electrostatic capacitance in relation with a reference object for the position alignment. The electrostatic capacitance detecting sensor 50 includes a plurality of electrostatic capacitance detecting electrodes 52, each forming the electrostatic capacitance in relation with the reference object; and a control circuit 51 for controlling a detection of the electrostatic capacitance by each electrostatic capacitance detecting electrode 52, while communicating with each electrostatic capacitance detecting electrode 52. The electrostatic capacitance detecting electrodes 52 are provided on a rear surface of the position detecting wafer S, and the control circuit 51 is provided on a front surface of the position detecting wafer S.Type: GrantFiled: July 30, 2008Date of Patent: April 3, 2012Assignee: Tokyo Electron LimitedInventors: Toshiyuki Matsumoto, Tomohide Minami, Yuichi Douki, Koji Mahara
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Patent number: 7994793Abstract: A transfer point of a transfer arm is detected accurately and stably by using a position detecting wafer having an electrostatic capacitance sensor. A position detecting wafer S is formed in a wafer shape transferable by a transfer arm 20 and includes an electrostatic capacitance sensor 50 for detecting a relative position with respect to a reference object by detecting an electrostatic capacitance in relation with the reference object for a position detection. The electrostatic capacitance sensor 50 includes a detection electrode 52 for forming the electrostatic capacitance in relation with the reference object, and the detection electrode 52 is installed on a rear surface of a main body of the wafer shape. Installed on the main body is a guard electrode 100 covering the detecting electrode 52 when viewed from a front surface thereof, for blocking an electric field oriented toward the detection electrode 52 from the front surface.Type: GrantFiled: October 21, 2008Date of Patent: August 9, 2011Assignee: Tokyo Electron LimitedInventors: Toshiyuki Matsumoto, Tomohide Minami, Koji Mahara, Yuichi Douki
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Patent number: 7884622Abstract: In the present invention, a position detecting substrate having a capacitive sensor is supported on a transfer arm and transferred by the transfer arm and mounted on a mounting part. The capacitive sensor on the position detecting substrate then detects a position of a target object on the mounting part to detect a mounting position of the position detecting substrate on the mounting part. Based on the mounting position of the position detecting substrate, the moving position of the transfer arm when transferring a substrate is then adjusted.Type: GrantFiled: August 15, 2008Date of Patent: February 8, 2011Assignee: Tokyo Electron LimitedInventors: Yuichi Doki, Koji Mahara, Tokutarou Hayashi
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Publication number: 20090115422Abstract: A transfer point of a transfer arm is detected accurately and stably by using a position detecting wafer having an electrostatic capacitance sensor. A position detecting wafer S is formed in a wafer shape transferable by a transfer arm 20 and includes an electrostatic capacitance sensor 50 for detecting a relative position with respect to a reference object by detecting an electrostatic capacitance in relation with the reference object for a position detection. The electrostatic capacitance sensor 50 includes a detection electrode 52 for forming the electrostatic capacitance in relation with the reference object, and the detection electrode 52 is installed on a rear surface of a main body of the wafer shape. Installed on the main body is a guard electrode 100 covering the detecting electrode 52 when viewed from a front surface thereof, for blocking an electric field oriented toward the detection electrode 52 from the front surface.Type: ApplicationFiled: October 21, 2008Publication date: May 7, 2009Applicant: TOKYO ELECTRON LIMITEDInventors: Toshiyuki Matsumoto, Tomohide Minami, Koji Mahara, Yuichi Douki
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Publication number: 20090051370Abstract: In the present invention, a position detecting substrate having a capacitive sensor is supported on a transfer arm and transferred by the transfer arm and mounted on a mounting part. The capacitive sensor on the position detecting substrate then detects a position of a target object on the mounting part to detect a mounting position of the position detecting substrate on the mounting part. Based on the mounting position of the position detecting substrate, the moving position of the transfer arm when transferring a substrate is then adjusted.Type: ApplicationFiled: August 15, 2008Publication date: February 26, 2009Applicant: TOKYO ELECTRON LIMITEDInventors: Yuichi Doki, Koji Mahara, Tokutarou Hayashi
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Publication number: 20090033908Abstract: A position alignment of a transfer point of a transfer arm is performed by using a position detecting wafer capable of being loaded into an apparatus having a thin transfer port. The position detecting wafer S includes an electrostatic capacitance detecting sensor 50 for detecting an electrostatic capacitance in relation with a reference object for the position alignment. The electrostatic capacitance detecting sensor 50 includes a plurality of electrostatic capacitance detecting electrodes 52, each forming the electrostatic capacitance in relation with the reference object; and a control circuit 51 for controlling a detection of the electrostatic capacitance by each electrostatic capacitance detecting electrode 52, while communicating with each electrostatic capacitance detecting electrode 52. The electrostatic capacitance detecting electrodes 52 are provided on a rear surface of the position detecting wafer S, and the control circuit 51 is provided on a front surface of the position detecting wafer S.Type: ApplicationFiled: July 30, 2008Publication date: February 5, 2009Applicant: TOKYO ELECTRON LIMITEDInventors: Toshiyuki Matsumoto, Tomohide Minami, Yuichi Douki, Koji Mahara
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Patent number: 6309116Abstract: A substrate processing system for processing a substrate in accordance with a photolithographic process, comprising a cassette section, a process section having a plurality of process units each processing a substrate, main transfer arm mechanism arranged in a transfer space surrounded by the process section and the cassette section, for transporting substrates one by one not only between a cassette of the cassette section and each of the plurality of process units but also between the plurality of process units, and a loop transfer path movably supporting the main transfer arm means in a lower portion of the transfer space and guiding the main transfer arm means so as to face each of the process units and the cassette section.Type: GrantFiled: June 6, 2000Date of Patent: October 30, 2001Assignee: Tokyo Electron LimitedInventors: Koji Mahara, Hiroyuki Kudou, Issei Ueda, Hiroichi Inada