Patents by Inventor Susumu Gotoh

Susumu Gotoh 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).

  • Patent number: 7049607
    Abstract: Electron beam writing equipment has an electron source and an electron optics system for scanning an electron beam emitted from the electron source on a sample via deflection means having at least two different deflection speeds. An objective lens is used to form a desired pattern on the sample The electron beam is moved by high speed scanning with the deflection means to repeat formation of a patterned beam. The electron beam is moved on the mark for beam correction by low speed scanning with the deflection means in synchronization with one cycle of the repetition. The position or the deflection distance of the electron beam or blanking time is corrected using detectors for back scattered or secondary electrons.
    Type: Grant
    Filed: September 29, 2004
    Date of Patent: May 23, 2006
    Assignees: Hitachi High-Technologies Corporation, Canon Kabushiki Kaisha
    Inventors: Yasunari Sohda, Hiroya Ohta, Osamu Kamimura, Susumu Gotoh
  • Publication number: 20050040343
    Abstract: Electron beam writing equipment has an electron source and an electron optics system for scanning an electron beam emitted from the electron source on a sample via deflection means having at least two different deflection speeds. An objective lens is used to form a desired pattern on the sample The electron beam is moved by high speed scanning with the deflection means to repeat formation of a patterned beam. The electron beam is moved on the mark for beam correction by low speed scanning with the deflection means in synchronization with one cycle of the repetition. The position or the deflection distance of the electron beam or blanking time is corrected using detectors for back scattered or secondary electrons.
    Type: Application
    Filed: September 29, 2004
    Publication date: February 24, 2005
    Inventors: Yasunari Sohda, Hiroya Ohta, Osamu Kamimura, Susumu Gotoh
  • Patent number: 6838682
    Abstract: There is provided an electron beam exposure technique which permits optical adjustment in an electron optics system using a doublet lens necessary for large field projection. Electron beam exposure equipment having a part forming one image by at least two electromagnetic lenses, has means measuring the position of an electron beam near an image plane with changing excitation of at least two lenses at the same time; and control means feeding back the measured result to aligners or the intensity of the lenses.
    Type: Grant
    Filed: August 6, 2003
    Date of Patent: January 4, 2005
    Assignees: Hitachi High-Technologies Corporation, Canon Kabushiki Kaisha
    Inventors: Yasunari Sohda, Osamu Kamimura, Hiroya Ohta, Susumu Gotoh
  • Patent number: 6809319
    Abstract: Electron beam writing equipment has an electron source and an electron optics system for scanning an electron beam emitted from the electron source on a sample via deflection means having at least two different deflection speeds. An objective lens is used to form a desired pattern on the sample. The electron beam is moved by high speed scanning with the deflection means to repeat formation of a patterned beam. The electron beam is moved on the mark for beam correction by low speed scanning with the deflection means in synchronization with one cycle of the repetition. The position or the deflection distance of the electron beam or blanking time is corrected using detectors for back scattered or secondary electrons.
    Type: Grant
    Filed: July 30, 2003
    Date of Patent: October 26, 2004
    Assignees: Hitachi High-Technologies Corporation, Canon Kabushiki Kaisha
    Inventors: Yasunari Sohda, Hiroya Ohta, Osamu Kamimura, Susumu Gotoh
  • Publication number: 20040129898
    Abstract: There is provided an electron beam wiring technique which can correct deflection for a micro field used in electron beam writing equipment with high precision.
    Type: Application
    Filed: July 30, 2003
    Publication date: July 8, 2004
    Inventors: Yasunari Sohda, Hiroya Ohta, Osamu Kamimura, Susumu Gotoh
  • Publication number: 20040119026
    Abstract: There is provided an electron beam exposure technique which permits optical adjustment in an electron optics system using a doublet lens necessary for large field projection.
    Type: Application
    Filed: August 6, 2003
    Publication date: June 24, 2004
    Inventors: Yasunari Sohda, Osamu Kamimura, Hiroya Ohta, Susumu Gotoh
  • Patent number: 6323499
    Abstract: An electron beam exposure apparatus which minimizes the influence of the space charge effect and aberrations of a reduction electron optical system, and simultaneously, increases the exposure area which can be exposed at once, thereby increasing the throughput. An electron beam exposure apparatus having a source for emitting an electron beam and a reduction electron optical system for reducing and projecting, on a target exposure surface, an image of the source, includes a correction electron optical system which is arranged between the source and the reduction electron optical system to form a plurality of intermediate images of the source along a direction perpendicular to the optical axis of the reduction electron optical system, and corrects in advance aberrations generated when the intermediate images are reduced and projected on the target exposure surface by the reduction electron optical system.
    Type: Grant
    Filed: June 16, 2000
    Date of Patent: November 27, 2001
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masato Muraki, Susumu Gotoh
  • Patent number: 6166387
    Abstract: An electron beam exposure apparatus which minimizes the influence of the space charge effect and aberrations of a reduction electron optical system, and simultaneously, increases the exposure area which can be exposed at once, thereby increasing the throughput. An electron beam exposure apparatus having a source for emitting an electron beam and a reduction electron optical system for reducing and projecting, on a target exposure surface, an image of the source, includes a correction electron optical system which is arranged between the source and the reduction electron optical system to form a plurality of intermediate images of the source along a direction perpendicular to the optical axis of the reduction electron optical system, and corrects in advance aberrations generated when the intermediate images are reduced and projected on the target exposure surface by the reduction electron optical system.
    Type: Grant
    Filed: May 17, 1999
    Date of Patent: December 26, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masato Muraki, Susumu Gotoh
  • Patent number: 5973332
    Abstract: An electron beam exposure apparatus which minimizes the influence of the space charge effect and aberrations of a reduction electron optical system, and simultaneously, increases the exposure area which can be exposed at once, thereby increasing the throughput. An electron beam exposure apparatus having a source for emitting an electron beam and a reduction electron optical system for reducing and projecting, on a target exposure surface, an image of the source, includes a correction electron optical system which is arranged between the source and the reduction electron optical system to form a plurality of intermediate images of the source along a direction perpendicular to the optical axis of the reduction electron optical system, and corrects in advance aberrations generated when the intermediate images are reduced and projected on the target exposure surface by the reduction electron optical system.
    Type: Grant
    Filed: June 17, 1998
    Date of Patent: October 26, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masato Muraki, Susumu Gotoh
  • Patent number: 5834783
    Abstract: An electron beam exposure apparatus which minimizes the influence of the space charge effect and aberrations of a reduction electron optical system, and simultaneously, increases the exposure area which can be exposed at once, thereby increasing the throughput. An electron beam exposure apparatus having a source for emitting an electron beam and a reduction electron optical system for reducing and projecting, on a target exposure surface, an image of the source, includes a correction electron optical system which is arranged between the source and the reduction electron optical system to form a plurality of intermediate images of the source along a direction perpendicular to the optical axis of the reduction electron optical system, and corrects in advance aberrations generated when the intermediate images are reduced and projected on the target exposure surface by the reduction electron optical system.
    Type: Grant
    Filed: March 4, 1997
    Date of Patent: November 10, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masato Muraki, Susumu Gotoh
  • Patent number: 5164974
    Abstract: An X-ray exposure apparatus wherein a member sensitive to X-ray is exposed to a pattern formed on a mask with the X-rays, includes an X-ray source for emitting X-rays, an irradiation chamber for accommodating the mask and the sensitive member and exposing them to the X-rays emitted by the X-ray source within the chamber and a vacuum pump for evacuating the chamber to effect the exposure operation in a vacuum.
    Type: Grant
    Filed: June 12, 1991
    Date of Patent: November 17, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takao Kariya, Yasuo Kawai, Masahiko Okunuki, Susumu Gotoh