Patents by Inventor Yasushi Toma

Yasushi Toma 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: 20230393085
    Abstract: Provided is a method of evaluating a deviation of a trajectory of a primary electron beam in a primary optical system in an electron beam observation device including the primary optical system that irradiates a sample with the primary electron beam including a plurality of primary electrons and a secondary optical system that detects, by a detector, a secondary electron beam including a plurality of secondary electrons emitted from the sample irradiated with the primary electron beam.
    Type: Application
    Filed: May 31, 2023
    Publication date: December 7, 2023
    Inventors: Kenji WATANABE, Takeshi MURAKAMI, Yasushi TOMA, Ryo TAJIMA, Tsutomu KARIMATA
  • Patent number: 10157722
    Abstract: An inspection device for inspecting a surface of an inspection object using a beam includes a beam generator capable of generating one of either charge particles or an electromagnetic wave as a beam, a primary optical system capable of guiding and irradiating the beam to the inspection object supported within a working chamber, a secondary optical system capable of including a first movable numerical aperture and a first detector which detects secondary charge particles generated from the inspection object, the secondary charge particles passing through the first movable numerical aperture, an image processing system capable of forming an image based on the secondary charge particles detected by the first detector; and a second detector arranged between the first movable numerical aperture and the first detector and which detects a location and shape at a cross over location of the secondary charge particles generated from the inspection object.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: December 18, 2018
    Assignee: EBARA CORPORATION
    Inventors: Masahiro Hatakeyama, Shoji Yoshikawa, Takeshi Murakami, Kenji Watanabe, Yoshihiko Naito, Yasushi Toma, Tsutomu Karimata, Takehide Hayashi, Kiwamu Tsukamoto, Tatsuya Kohama, Noboru Kobayashi
  • Patent number: 10002740
    Abstract: An electron beam inspection device includes: a primary electron optical system that irradiates the surface of a sample with an electron beam; and a secondary electron optical system that gathers secondary electrons emitted from the sample and forms an image on the sensor surface of a detector. An electron image of the surface of the sample is obtained from a signal detected by the detector, and the sample is inspected. A cylindrical member that is formed with conductors stacked as an inner layer and an outer layer, and an insulator stacked as an intermediate layer is provided inside a lens tube into which the secondary electron optical system is incorporated. An electron orbital path is formed inside the cylindrical member, and the members constituting the secondary electron optical system are arranged outside the cylindrical member.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: June 19, 2018
    Assignee: EBARA CORPORATION
    Inventors: Masahiro Hatakeyama, Ryo Tajima, Kenichi Suematsu, Kenji Watanabe, Yasushi Toma, Kenji Terao, Takeshi Murakami
  • Publication number: 20180040452
    Abstract: An electron beam inspection device includes: a primary electron optical system that irradiates the surface of a sample with an electron beam; and a secondary electron optical system that gathers secondary electrons emitted from the sample and forms an image on the sensor surface of a detector. An electron image of the surface of the sample is obtained from a signal detected by the detector, and the sample is inspected. A cylindrical member that is formed with conductors stacked as an inner layer and an outer layer, and an insulator stacked as an intermediate layer is provided inside a lens tube into which the secondary electron optical system is incorporated. An electron orbital path is formed inside the cylindrical member, and the members constituting the secondary electron optical system are arranged outside the cylindrical member.
    Type: Application
    Filed: August 2, 2017
    Publication date: February 8, 2018
    Inventors: Masahiro HATAKEYAMA, Ryo TAJIMA, Kenichi SUEMATSU, Kenji WATANABE, Yasushi TOMA, Kenji TERAO, Takeshi MURAKAMI
  • Publication number: 20160307726
    Abstract: An inspection device for inspecting a surface of an inspection object using a beam includes a beam generator capable of generating one of either charge particles or an electromagnetic wave as a beam, a primary optical system capable of guiding and irradiating the beam to the inspection object supported within a working chamber, a secondary optical system capable of including a first movable numerical aperture and a first detector which detects secondary charge particles generated from the inspection object, the secondary charge particles passing through the first movable numerical aperture, an image processing system capable of forming an image based on the secondary charge particles detected by the first detector; and a second detector arranged between the first movable numerical aperture and the first detector and which detects a location and shape at a cross over location of the secondary charge particles generated from the inspection object.
    Type: Application
    Filed: June 28, 2016
    Publication date: October 20, 2016
    Applicant: EBARA CORPORATION
    Inventors: Masahiro Hatakeyama, Shoji Yoshikawa, Takeshi Murakami, Kenji Watanabe, Yoshihiko Naito, Yasushi Toma, Tsutomu Karimata, Takehide Hayashi, Kiwamu Tsukamoto, Tatsuya Kohama, Noboru Kobayashi
  • Publication number: 20150097116
    Abstract: An inspection apparatus includes: beam generation means for generating any of charged particles and electromagnetic waves as a beam; a primary optical system that guides the beam into an inspection object held in a working chamber and irradiates the inspection object with the beam; a secondary optical system that detects secondary charged particles occurring from the inspection object; and an image processing system that forms an image on the basis of the detected secondary charged particles. The primary optical system includes a photoelectron generator having a photoelectronic surface. The base material of the photoelectronic surface is made of material having a higher thermal conductivity than the thermal conductivity of quartz.
    Type: Application
    Filed: December 16, 2014
    Publication date: April 9, 2015
    Inventors: Masahiro HATAKEYAMA, Yasushi TOMA, Shoji YOSHIKAWA, Kiwamu TSUKAMOTO
  • Patent number: 8946629
    Abstract: An inspection apparatus includes: beam generation means for generating any of charged particles and electromagnetic waves as a beam; a primary optical system that guides the beam into an inspection object held in a working chamber and irradiates the inspection object with the beam; a secondary optical system that detects secondary charged particles occurring from the inspection object; and an image processing system that forms an image on the basis of the detected secondary charged particles. The primary optical system includes a photoelectron generator having a photoelectronic surface. The base material of the photoelectronic surface is made of material having a higher thermal conductivity than the thermal conductivity of quartz.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: February 3, 2015
    Assignee: Ebara Corporation
    Inventors: Masahiro Hatakeyama, Yasushi Toma, Shoji Yoshikawa, Kiwamu Tsukamoto
  • Publication number: 20140319345
    Abstract: An inspection apparatus includes: beam generation means for generating any of charged particles and electromagnetic waves as a beam; a primary optical system that guides the beam into an inspection object held in a working chamber and irradiates the inspection object with the beam; a secondary optical system that detects secondary charged particles occurring from the inspection object; and an image processing system that forms an image on the basis of the detected secondary charged particles. The primary optical system includes a photoelectron generator having a photoelectronic surface. The base material of the photoelectronic surface is made of material having a higher thermal conductivity than the thermal conductivity of quartz.
    Type: Application
    Filed: April 22, 2014
    Publication date: October 30, 2014
    Applicant: EBARA CORPORATION
    Inventors: Masahiro HATAKEYAMA, Yasushi TOMA, Shoji YOSHIKAWA, Kiwamu TSUKAMOTO
  • Patent number: 8742344
    Abstract: An inspection apparatus includes: beam generation means for generating any of charged particles and electromagnetic waves as a beam; a primary optical system that guides the beam into an inspection object held in a working chamber and irradiates the inspection object with the beam; a secondary optical system that detects secondary charged particles occurring from the inspection object; and an image processing system that forms an image on the basis of the detected secondary charged particles. The primary optical system includes a photoelectron generator having a photoelectronic surface. The base material of the photoelectronic surface is made of material having a higher thermal conductivity than the thermal conductivity of quartz. A central portion of the inspection object is provided with a central flat portion 390. The periphery of the central flat portion 390 is provided with peripheral flat portion 392 via a step 391. The periphery of the step 391 is provided with an electric field correction plate 400.
    Type: Grant
    Filed: September 13, 2013
    Date of Patent: June 3, 2014
    Assignee: Ebara Corporation
    Inventors: Masahiro Hatakeyama, Yasushi Toma, Shoji Yoshikawa, Kiwamu Tsukamoto
  • Publication number: 20140077078
    Abstract: An inspection apparatus includes: beam generation means for generating any of charged particles and electromagnetic waves as a beam; a primary optical system that guides the beam into an inspection object held in a working chamber and irradiates the inspection object with the beam; a secondary optical system that detects secondary charged particles occurring from the inspection object; and an image processing system that forms an image on the basis of the detected secondary charged particles. The primary optical system includes a photoelectron generator having a photoelectronic surface. The base material of the photoelectronic surface is made of material having a higher thermal conductivity than the thermal conductivity of quartz.
    Type: Application
    Filed: September 13, 2013
    Publication date: March 20, 2014
    Inventors: Masahiro HATAKEYAMA, Yasushi TOMA, Shoji YOSHIKAWA, Kiwamu TSUKAMOTO
  • Publication number: 20140014848
    Abstract: An inspection device for inspecting a surface of an inspection object using a beam includes a beam generator capable of generating one of either charge particles or an electromagnetic wave as a beam, a primary optical system capable of guiding and irradiating the beam to the inspection object supported within a working chamber, a secondary optical system capable of including a first movable numerical aperture and a first detector which detects secondary charge particles generated from the inspection object, the secondary charge particles passing through the first movable numerical aperture, an image processing system capable of forming an image based on the secondary charge particles detected by the first detector; and a second detector arranged between the first movable numerical aperture and the first detector and which detects a location and shape at a cross over location of the secondary charge particles generated from the inspection object.
    Type: Application
    Filed: July 19, 2013
    Publication date: January 16, 2014
    Applicant: EBARA CORPORATION
    Inventors: Masahiro Hatakeyama, Shoji Yoshikawa, Takeshi Murakami, Kenji Watanabe, Yoshihiko Naito, Yasushi Toma, Tsutomu Karimata, Takehide Hayashi, Kiwamu Tsukamoto, Tatsuya Kohama, Noboru Kobayashi
  • Patent number: 8497476
    Abstract: An inspection device for inspecting a surface of an inspection object using a beam includes a beam generator capable of generating one of either charge particles or an electromagnetic wave as a beam, a primary optical system capable of guiding and irradiating the beam to the inspection object supported within a working chamber, a secondary optical system capable of including a first movable numerical aperture and a first detector which detects secondary charge particles generated from the inspection object, the secondary charge particles passing through the first movable numerical aperture, an image processing system capable of forming an image based on the secondary charge particles detected by the first detector; and a second detector arranged between the first movable numerical aperture and the first detector and which detects a location and shape at a cross over location of the secondary charge particles generated from the inspection object.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: July 30, 2013
    Assignee: Ebara Corporation
    Inventors: Masahiro Hatakeyama, Shoji Yoshikawa, Takeshi Murakami, Kenji Watanabe, Yoshihiko Naito, Yasushi Toma, Tsutomu Karimata, Takehide Hayashi, Kiwamu Tsukamoto, Tatsuya Kohama, Noboru Kobayashi
  • Publication number: 20120235036
    Abstract: An inspection device for inspecting a surface of an inspection object using a beam includes a beam generator capable of generating one of either charge particles or an electromagnetic wave as a beam, a primary optical system capable of guiding and irradiating the beam to the inspection object supported within a working chamber, a secondary optical system capable of including a first movable numerical aperture and a first detector which detects secondary charge particles generated from the inspection object, the secondary charge particles passing through the first movable numerical aperture, an image processing system capable of forming an image based on the secondary charge particles detected by the first detector; and a second detector arranged between the first movable numerical aperture and the first detector and which detects a location and shape at a cross over location of the secondary charge particles generated from the inspection object.
    Type: Application
    Filed: March 15, 2012
    Publication date: September 20, 2012
    Applicant: EBARA CORPORATION
    Inventors: Masahiro Hatakeyama, Shoji Yoshikawa, Takeshi Murakami, Kenji Watanabe, Yoshihiko Naito, Yasushi Toma, Tsutomu Karimata, Takehide Hayashi, Kiwamu Tsukamoto, Tatsuya Kohama, Noboru Kobayashi
  • Patent number: 8133380
    Abstract: A method and device for regenerating an ion exchanger can regenerate an ion exchanger easily and quickly, and can minimize a load upon cleaning of the regenerated ion exchanger and disposal of waste liquid. A method for regenerating a contaminated ion exchanger includes: providing a pair of a regeneration electrode and a counter electrode, a partition disposed between the electrodes, and an ion exchanger to be regenerated disposed between the counter electrode and the partition; and applying a voltage between the regeneration electrode and the counter electrode while supplying a liquid between the partition and the regeneration electrode and also supplying a liquid between the partition and the counter electrode.
    Type: Grant
    Filed: August 14, 2008
    Date of Patent: March 13, 2012
    Assignee: Ebara Corporation
    Inventors: Takayuki Saito, Tsukuru Suzuki, Yuji Makita, Kaoru Yamada, Masayuki Kumekawa, Hozumi Yasuda, Osamu Nabeya, Kazuto Hirokawa, Mitsuhiko Shirakashi, Yasushi Toma, Itsuki Kobata
  • Publication number: 20100325913
    Abstract: A substrate processing method dose not use or only use the least possible amount of an organic solvent, and can quickly and completely remove a liquid from a wet substrate surface without allowing the liquid to remain on the substrate surface. The substrate processing method for drying a substrate surface which is wet with a liquid, includes: removing the liquid from the substrate surface and sucking the liquid together with its surrounding gas into a gas/liquid suction nozzle, disposed opposite the substrate surface, while relatively moving the gas/liquid suction nozzle and the substrate parallel to each other; and blowing a dry gas from a dry gas supply nozzle, disposed opposite the substrate surface, toward that area of the substrate surface from which the liquid has been removed while relatively moving the dry gas supply nozzle and the substrate parallel to each other.
    Type: Application
    Filed: June 23, 2010
    Publication date: December 30, 2010
    Inventors: Xinming WANG, Kazuo Yamauchi, Akira Kodera, Tsukuru Suzuki, Yasushi Toma, Takayuki Saito, Hirokuni Hiyama
  • Patent number: 7638030
    Abstract: An electrolytic processing apparatus which, while eliminating a CMP processing entirely or reducing a load on a CMP processing to the least possible extent, can process and flatten a conductive material formed in the surface of a substrate, or can remove (clean) extraneous matter adhering to the surface of a workpiece such as a substrate. The present invention includes an electrode section including a plurality of electrode members disposed in parallel, each electrode member including an electrode and an ion exchanger covering the surface of the electrode, a holder for holding a workpiece, which is capable of bringing the workpiece close to or into contact with the ion exchanger of the electrode member, and a power source to be connected to the electrode of each electrode member of the electrode section. The ion exchanger of the electrode member includes an ion exchanger having an excellent surface smoothness and an ion exchanger having a large ion exchange capacity.
    Type: Grant
    Filed: September 25, 2003
    Date of Patent: December 29, 2009
    Assignee: Ebara Corporation
    Inventors: Osamu Nabeya, Masayuki Kumekawa, Hozumi Yasuda, Itsuki Kobata, Takeshi Iizumi, Nobuyuki Takada, Koichi Fukaya, Mitsuhiko Shirakashi, Takayuki Saito, Yasushi Toma, Tsukuru Suzuki, Kaoru Yamada, Yuji Makita
  • Patent number: 7563356
    Abstract: A composite processing apparatus which can securely process a conductive material, such as a copper film, at a low surface pressure and a high rate while effectively preventing the formation of pits is disclosed. The composite processing apparatus includes: a substrate holder for holding a substrate; a processing table including a mechanical processing section for processing a surface of the substrate by a processing method involving a mechanical action; and an electrolytic processing section which is separate from the mechanical processing section. The electrolytic processing section includes a processing electrode with an ion exchanger, for processing the substrate by applying a voltage between the processing electrode and the substrate while keeping the ion exchanger (92) in contact with the substrate.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: July 21, 2009
    Assignee: Ebara Corporation
    Inventors: Osamu Nabeya, Takayuki Saito, Tsukuru Suzuki, Yasushi Toma, Ikutaro Noji
  • Patent number: 7527723
    Abstract: An electrolytic processing apparatus can increase the efficiency of the dissociation reaction of water and efficiently perform electrolytic processing, and can eliminate the need for an operation of a change of ion exchanger. The electrolytic processing apparatus includes: a processing electrode and a feeding electrode; a liquid supply section for supplying a liquid containing an ion-exchange material between the workpiece and at least one of the processing electrode and the feeding electrode; a power source for applying a voltage between the processing electrode and the feeding electrode; and a drive section for moving the workpiece and at least one of the processing electrode and the feeding electrode relative to each other; wherein electrolytic processing of the workpiece is carried out while keeping the workpiece not in contact with but close to the processing electrode at a distance of not more than 10 ?m.
    Type: Grant
    Filed: January 14, 2005
    Date of Patent: May 5, 2009
    Assignee: Ebara Corporation
    Inventors: Itsuki Kobata, Yutaka Wada, Hirokuni Hiyama, Takayuki Saito, Yasushi Toma, Tsukuru Suzuki, Akira Kodera
  • Publication number: 20090107851
    Abstract: An electrolytic polishing method of a substrate having a barrier film and an interconnect metal layer on a surface to be processed under the presence of an electrolytic solution, including a barrier film electrolytic polishing process which removes the barrier film by applying a voltage between a cathode and an anode, with the surface to be processed serving as the cathode, and causing relative motion between the surface to be processed and a polishing pad which faces and makes contact with the surface to be processed.
    Type: Application
    Filed: October 9, 2008
    Publication date: April 30, 2009
    Inventors: Akira Kodera, Xinming Wang, Itsuki Kobata, Yasushi Toma
  • Publication number: 20090095637
    Abstract: The present invention provides an electrochemical polishing method capable of increasing a polishing speed while preventing excessive polishing, such as dishing or erosion. In the electrochemical polishing method, when a voltage applied to a conductive film formed on the surface of a substrate is increased at a contact surface pressure of 0 between the surface of the substrate and a polishing pad, a voltage at a first change point C that allows a current density to start to decrease after an increase is referred to as a minimum voltage. In addition, when the voltage is increased at a contact surface pressure having a finite value, a voltage at a second change point B that allows the current density to be maintained constant after the decrease is referred to as a maximum voltage. In this case, the surface of the conductive film is polished while maintaining the voltage to be not lower than the minimum voltage and not higher than the maximum voltage.
    Type: Application
    Filed: October 8, 2008
    Publication date: April 16, 2009
    Inventors: Yasushi Toma, Akira Kodera, Hirokuni Hiyama