Patents by Inventor Keita Yagi

Keita Yagi 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).

  • Publication number: 20220048160
    Abstract: A substrate processing apparatus that polishes a substrate by sliding the substrate on a polishing member, the substrate processing apparatus including a dresser that dresses the polishing member by swinging on the polishing member, the dresser being enabled to adjust a swing speed in a plurality of scanning areas set on the polishing member along a radial direction, a height detection section that measures a surface height of the polishing member along the radial direction of the polishing member and thereby generates a pad profile, a dresser load setting section that sets a dresser load to be applied by the dresser to the polishing member, a pad height correction section that calculates an amount of correction of the surface height of the polishing member according to an amount of variation from a reference load of the dresser load over the radial direction, corrects the measured value of the surface height with the amount of correction and thereby corrects the pad profile, and a moving speed calculation se
    Type: Application
    Filed: August 10, 2021
    Publication date: February 17, 2022
    Inventors: Yasumasa Hiroo, Keita Yagi
  • Publication number: 20220012997
    Abstract: A monitoring system (10) including: an information accumulation program (32) configured to accumulate position information of a user terminal (100) carried by a watched person, the position information being determined based on information uploaded from the user terminal; a living area determination program (33) configured to determine a living area of the watched person, based on position information accumulated in a predetermined period among pieces of the accumulated position information; a determination program (37) configured to determine a positional relationship between a position of the user terminal, which is determined based on the position information of the first terminal, and the living area; and a notification program (28) configured to notify a guardian terminal (209) of a determination result.
    Type: Application
    Filed: September 27, 2021
    Publication date: January 13, 2022
    Inventor: Keita Yagi
  • Publication number: 20210402550
    Abstract: A polishing method capable of measuring a film thickness of a substrate, such as a semiconductor wafer, having various structural elements on its surface with high accuracy is disclosed. The polishing method includes: generating spectra of reflected lights from measurement points on a substrate; classifying the spectra based on a shape of each spectrum into primary spectra belonging to a first group and a secondary spectrum belonging to a second group; determining film thicknesses of the substrate from the primary spectra; and determining a film thickness at a measurement point corresponding to the secondary spectrum using the primary spectra or the film thicknesses.
    Type: Application
    Filed: June 7, 2021
    Publication date: December 30, 2021
    Inventors: Yoichi Shiokawa, Keita Yagi, Yuki Watanabe, Nachiketa Chauhan
  • Patent number: 11195729
    Abstract: A substrate polishing apparatus includes a top ring for pressing a substrate against a polishing pad to perform substrate polishing; a spectrum generating unit that directs light onto a surface of the substrate of interest for polishing, receives reflected light, and calculates a reflectivity spectrum corresponding to the wavelength of the reflected light; and a storage that stores a plurality of thickness estimating algorithms for estimating the thickness of the polished surface in accordance with the reflectivity spectrum. A plurality of thickness estimating algorithms is selected among the thickness estimating algorithms stored in the storage, and a switching condition is set. The thickness of the polished surface is estimated by using the set thickness estimating algorithms, and if the switching condition is satisfied, the thickness estimating algorithm to be applied is switched.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: December 7, 2021
    Assignee: EBARA CORPORATION
    Inventors: Yuki Watanabe, Keita Yagi
  • Patent number: 11121798
    Abstract: A method of controlling a communication device including a communication interface that communicates with a wireless terminal includes successively selecting one transmission scheme included in a plurality of transmission schemes according to schedule information and using the selected one transmission scheme for a trial of communications with the wireless terminal via a communication interface in a first period; determining which transmission scheme of the plurality of transmission schemes has succeeded in communicating with the wireless terminal in the first period; and adjusting the schedule information so that a trial of communications using a transmission scheme determined as having succeeded in communicating with the wireless terminal is started earlier in a second period subsequent to the first period than in the first period.
    Type: Grant
    Filed: October 22, 2018
    Date of Patent: September 14, 2021
    Assignee: Murata Machinery, Ltd.
    Inventors: Yasuhiro Kuratani, Ryuji Shimoji, Keita Yagi
  • Publication number: 20210170544
    Abstract: A substrate polishing method capable of reducing an influence of variation in spectrum of reflected light from a substrate, such as a wafer, and determining an accurate film thickness is disclosed. The method includes: polishing a surface of a substrate by pressing the substrate against a polishing pad on a rotating polishing table; producing a spectrum of reflected light from the surface of the substrate each time the polishing table makes one rotation; creating a three-dimensional data containing a plurality of spectra arranged along polishing time; and determining a film thickness of the substrate based on the three-dimensional data.
    Type: Application
    Filed: December 3, 2020
    Publication date: June 10, 2021
    Inventors: Keita Yagi, Yoichi Shiokawa, Toshimitsu Sasaki, Yuki Watanabe, Nachiketa Chauhan
  • Publication number: 20210101250
    Abstract: To measure thickness in a polishing treatment more efficiently. A substrate polishing apparatus comprises a rotatably configured polishing table provided with a sensor that outputs a signal related to a thickness, a rotatably configured polishing head that faces the polishing table, a substrate being attachable to a face of the polishing head that faces the polishing table, and a controller. The controller acquires a signal from the sensor when the sensor passes over a surface to be polished of the substrate, specifies an orbit of the sensor with respect to the substrate on a basis of a profile of the signal, calculates a thickness of the substrate at each point on the orbit on a basis of the signal, and creates a thickness map on a basis of the calculated thickness at each point on a plurality of orbits of the sensor.
    Type: Application
    Filed: September 22, 2020
    Publication date: April 8, 2021
    Inventors: Katsuhide Watanabe, Yoichi Shiokawa, Keita Yagi, Akira Nakamura
  • Patent number: 10916455
    Abstract: A flattening method, by utilizing the advantages of the CARE method and making up for the disadvantages, can perform removal processing of a surface of a workpiece at a sufficient processing rate and can provide a processed surface having enhanced flatness without leaving damage in the processed surface. A flattening method comprises at least two surface removal steps and at least two cleaning steps, the final surface removal step being a catalyst-referred etching step comprising immersing a workpiece in a processing solution containing at least one of hydrohalic acid, hydrogen peroxide water and ozone water, and bringing a surface of a catalyst platen into contact with or close proximity to a surface to be processed of the workpiece to process the surface, said catalyst platen having in a surface a catalyst selected from the group consisting of platinum, gold, a ceramic solid catalyst, a transition metal, glass, and an acidic or basic solid catalyst.
    Type: Grant
    Filed: April 1, 2019
    Date of Patent: February 9, 2021
    Assignee: EBARA CORPORATION
    Inventors: Kazuto Yamauchi, Yasuhisa Sano, Hideyuki Hara, Junji Murata, Keita Yagi
  • Publication number: 20200358551
    Abstract: A method of controlling a communication device including a communication interface that communicates with a wireless terminal includes successively selecting one transmission scheme included in a plurality of transmission schemes according to schedule information and using the selected one transmission scheme for a trial of communications with the wireless terminal via a communication interface in a first period; determining which transmission scheme of the plurality of transmission schemes has succeeded in communicating with the wireless terminal in the first period; and adjusting the schedule information so that a trial of communications using a transmission scheme determined as having succeeded in communicating with the wireless terminal is started earlier in a second period subsequent to the first period than in the first period.
    Type: Application
    Filed: October 22, 2018
    Publication date: November 12, 2020
    Inventors: Yasuhiro Kuratani, Ryuji Shimoji, Keita Yagi
  • Patent number: 10828747
    Abstract: A polishing apparatus comprises a dresser that can adjust swing speed in the scanning areas set on a polishing member along a swing direction, a height detection section that measures a surface height of the polishing member in a plurality of monitoring areas set on the polishing member along the swing direction of the dresser, a dress model matrix creation section that creates a dress model matrix defined from a plurality of monitoring areas, scanning areas and a dress model, an evaluation index creation section that calculates a height profile predicted value using the dress model, the swing speed in each scanning area or a staying time and sets evaluation index based on a difference from a target value of height profile of the polishing member and a moving speed calculation section that calculates the swing speed in each scanning area of the dresser based on the evaluation index.
    Type: Grant
    Filed: July 2, 2018
    Date of Patent: November 10, 2020
    Assignee: EBARA CORPORATION
    Inventors: Yasumasa Hiroo, Keita Yagi
  • Publication number: 20200243364
    Abstract: An object of the present invention is to improve a substrate processing apparatus using the CARE method. The present invention provides a substrate processing apparatus for polishing a processing target region of a substrate by bringing the substrate and a catalyst into contact with each other in the presence of processing liquid. The substrate processing apparatus includes a substrate holding unit configured to hold the substrate, a catalyst holding unit configured to hold the catalyst, and a driving unit configured to move the substrate holding unit and the catalyst holding unit relative to each other with the processing target region of the substrate and the catalyst kept in contact with each other. The catalyst is smaller than the substrate.
    Type: Application
    Filed: April 10, 2020
    Publication date: July 30, 2020
    Inventors: Itsuki Kobata, Keita Yagi, Katsuhide Watanabe, Yoichi Shiokawa, Toru Maruyama, Nobuyuki Takahashi
  • Publication number: 20200198094
    Abstract: A dresser is enabled to adjust a swing speed in scanning areas set on a polishing member along a swing direction. A surface height of the polishing member in monitoring areas set in advance on the polishing member along the swing direction of the dresser is measured. A dress model matrix defined from the monitoring areas, the scanning areas and a dress model is created. Height profile predicted value is calculated using the dress model and the swing speed in each scanning area or a staying time. Evaluation index is set based on a difference from a target value of a height profile of the polishing member and a step of setting the swing speed in each scanning area of the dresser based on the evaluation index. At least one of parameters to determine the target value or the evaluation index of the height profile is made to change automatically.
    Type: Application
    Filed: December 19, 2019
    Publication date: June 25, 2020
    Inventors: Keita Yagi, Yasumasa Hiroo
  • Patent number: 10665487
    Abstract: An object of the present invention is to improve a substrate processing apparatus using the CARE method. The present invention provides a substrate processing apparatus for polishing a processing target region of a substrate by bringing the substrate and a catalyst into contact with each other in the presence of processing liquid. The substrate processing apparatus includes a substrate holding unit configured to hold the substrate, a catalyst holding unit configured to hold the catalyst, and a driving unit configured to move the substrate holding unit and the catalyst holding unit relative to each other with the processing target region of the substrate and the catalyst kept in contact with each other. The catalyst is smaller than the substrate.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: May 26, 2020
    Assignee: EBARA CORPORATION
    Inventors: Itsuki Kobata, Keita Yagi, Katsuhide Watanabe, Yoichi Shiokawa, Toru Maruyama, Nobuyuki Takahashi
  • Publication number: 20200102988
    Abstract: In a vehicle cam damper structure, a drive shaft includes a cam damper at a midway portion thereof. The cam damper integrates a cam reception portion with a cam via a shaft member. The cam reception portion is connected relatively rotatably with the shaft member. The cam and the shaft member, while being integrally rotatable, are connected with each other axially slidably. The shaft member includes an enlarged-diameter portion. An elastic member that presses the cam toward a side of the cam reception portion is disposed between the enlarged-diameter portion and the cam. An outer cylinder extends across the cam reception portion and the shaft member. A drive-side shaft and a driven-side shaft of the drive shaft are each connected with corresponding one of the cam reception portion and the shaft member.
    Type: Application
    Filed: September 19, 2019
    Publication date: April 2, 2020
    Inventors: Koji Sato, Akio Handa, Keita Yagi, Dai Arai, Eiichi Suzuki, Takeyuki Kariyasu
  • Patent number: 10556314
    Abstract: According to one aspect, a substrate processing apparatus is provided. The substrate processing apparatus includes a table provided with a substrate holding surface for holding a substrate, a pad for processing the substrate held on the table, a head for holding the pad, an actuator for moving the head in a direction perpendicular to the substrate holding surface of the table, and a mechanical stopper device for stopping a movement of the head in the direction perpendicular to the substrate holding surface.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: February 11, 2020
    Assignee: EBARA CORPORATION
    Inventors: Suguru Sakugawa, Toru Maruyama, Nobuyuki Takahashi, Zhongxin Wen, Yoichi Shiokawa, Keita Yagi, Itsuki Kobata, Tomohiko Takeuchi
  • Patent number: 10399203
    Abstract: The present invention relates to a polishing method and a polishing apparatus for polishing a substrate such as a wafer while measuring a film thickness based on optical information included in reflected light from the substrate.
    Type: Grant
    Filed: April 10, 2015
    Date of Patent: September 3, 2019
    Assignee: EBARA CORPORATION
    Inventors: Yoichi Kobayashi, Keita Yagi, Masaki Kinoshita, Yoichi Shiokawa
  • Publication number: 20190228994
    Abstract: A flattening method, by utilizing the advantages of the CARE method and making up for the disadvantages, can perform removal processing of a surface of a workpiece at a sufficient processing rate and can provide a processed surface having enhanced flatness without leaving damage in the processed surface. A flattening method comprises at least two surface removal steps and at least two cleaning steps, the final surface removal step being a catalyst-referred etching step comprising immersing a workpiece in a processing solution containing at least one of hydrohalic acid, hydrogen peroxide water and ozone water, and bringing a surface of a catalyst platen into contact with or close proximity to a surface to be processed of the workpiece to process the surface, said catalyst platen having in a surface a catalyst selected from the group consisting of platinum, gold, a ceramic solid catalyst, a transition metal, glass, and an acidic or basic solid catalyst.
    Type: Application
    Filed: April 1, 2019
    Publication date: July 25, 2019
    Inventors: Kazuto YAMAUCHI, Yasuhisa SANO, Hideyuki HARA, Junji MURATA, Keita YAGI
  • Publication number: 20190160626
    Abstract: A substrate processing apparatus includes a polishing head defining plural pressure chambers D1 to D5 for pressing a wafer W on a polishing pad 42, a pressure control unit performing pressure feedback control by individually controlling pressures in the pressure chambers D1 to D5, a film thickness measurement unit measuring a film thickness distribution of the wafer W being polished, a storage unit storing multiple pieces of information on a preset pressure of the pressure chambers D1 to D5, and a response characteristic acquisition unit changing the preset pressure every time a predetermined condition is satisfied during polishing of the wafer W, measuring a polishing rate applied to the wafer W, and acquiring a response characteristic of the polishing of the wafer W. The response characteristic indicates responsiveness of the polishing of the wafer W to the pressure feedback. The response characteristic is acquired based on the obtained polishing rates.
    Type: Application
    Filed: November 27, 2018
    Publication date: May 30, 2019
    Inventors: Yuki WATANABE, Keita YAGI
  • Patent number: 10297475
    Abstract: A flattening method, by utilizing the advantages of the CARE method and making up for the disadvantages, can perform removal processing of a surface of a workpiece at a sufficient processing rate and can provide a processed surface having enhanced flatness without leaving damage in the processed surface. A flattening method comprises at least two surface removal steps and at least two cleaning steps, the final surface removal step being a catalyst-referred etching step comprising immersing a workpiece in a processing solution containing at least one of hydrohalic acid, hydrogen peroxide water and ozone water, and bringing a surface of a catalyst platen into contact with or close proximity to a surface to be processed of the workpiece to process the surface, said catalyst platen having in a surface a catalyst selected from the group consisting of platinum, gold, a ceramic solid catalyst, a transition metal, glass, and an acidic or basic solid catalyst.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: May 21, 2019
    Assignee: Ebara Corporation
    Inventors: Kazuto Yamauchi, Yasuhisa Sano, Hideyuki Hara, Junji Murata, Keita Yagi
  • Publication number: 20190134774
    Abstract: A polishing method capable of improving a spatial resolution of a film-thickness measurement without changing a measuring cycle of a film-thickness sensor and without increasing an amount of measurement data is disclosed.
    Type: Application
    Filed: November 2, 2018
    Publication date: May 9, 2019
    Inventors: Keita YAGI, Toshimitsu SASAKI