Patents by Inventor Yasuhiro Someda

Yasuhiro Someda 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: 6509572
    Abstract: In order to provide a high-speed and high accuracy cell projection exposure apparatus which increases a pattern projection number extremely, a plurality of stencil masks mounting a transferal aperture and a transmission aperture are provided and are positioned by a drive stage, the electron beam passes through a transmission aperture of other stencil masks while selecting the aperture on a stencil mask with a beam deflection device, the transmission aperture is provided for a mask transfer direction in succession, the stencil mask is moved while being transmitted with the beam, and other stencil mask transfer is executed when specified stencil mask aperture group is exposed. These operations are repeated so that all exposure processes are performed.
    Type: Grant
    Filed: March 26, 2002
    Date of Patent: January 21, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Hiroyuki Ito, Yasunari Sohda, Yasuhiro Someda, Yoshinori Nakayama, Masahide Okumura, Hidetoshi Satoh
  • Publication number: 20020179856
    Abstract: In order to provide a high-speed and high accuracy cell projection exposure apparatus which greatly increases a pattern projection speed, a plurality of stencil masks mounting a transferal aperture and a transmission aperture are provided and are positioned by a drive stage, the electron beam passes through a transmission aperture of other stencil masks while selecting the aperture on a stencil mask with a beam deflection device, the transmission aperture is provided for mask transfer direction in succession, the stencil mask is moved while being transmitted with the beam, and other stencil mask transfer is executed when specified stencil mask aperture group is exposed. These operations are repeated so that all exposure processes are performed.
    Type: Application
    Filed: July 15, 2002
    Publication date: December 5, 2002
    Applicant: Hitachi, Ltd.
    Inventors: Hiroyuki Ito, Yasunari Sohda, Yasuhiro Someda, Yoshinori Nakayama, Masahide Okumura, Hidetoshi Satoh
  • Patent number: 6441383
    Abstract: In order to provide a high-speed and high accuracy cell projection exposure apparatus which increases a pattern projection number extremely, a plurality of stencil masks mounting a transferal aperture and a transmission aperture are provided and are positioned by a drive stage, the electron beam passes through a transmission aperture of other stencil masks while selecting the aperture on a stencil masks with a beam deflection device, the transmission aperture is provided for a mask transfer direction in succession, the stencil mask is moved while being transmitted with the beam, and other stencil mask transfer is executed when specified stencil mask aperture group is exposed. These operations are repeated so that all exposure processes are performed.
    Type: Grant
    Filed: March 22, 2001
    Date of Patent: August 27, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Hiroyuki Ito, Yasunari Sohda, Yasuhiro Someda, Yoshinori Nakayama, Masahide Okumura, Hidetoshi Satoh
  • Publication number: 20020100881
    Abstract: In order to provide a high-speed and high accuracy cell projection exposure apparatus which increases a pattern projection number extremely, a plurality of stencil masks mounting a transferal aperture and a transmission aperture are provided and are positioned by a drive stage, the electron beam passes through a transmission aperture of other stencil masks while selecting the aperture on a stencil mask with a beam deflection device, the transmission aperture is provided for a mask transfer direction in succession, the stencil mask is moved while being transmitted with the beam, and other stencil mask transfer is executed when specified stencil mask aperture group is exposed. These operations are repeated so that all exposure processes are performed.
    Type: Application
    Filed: March 26, 2002
    Publication date: August 1, 2002
    Inventors: Hiroyuki Ito, Yasunari Sohda, Yasuhiro Someda, Yoshinori Nakayama, Masahide Okumura, Hidetoshi Satoh
  • Publication number: 20020096651
    Abstract: In order to provide a high-speed and high accuracy cell projection exposure apparatus which increases a pattern projection number extremely, a plurality of stencil masks mounting a transferal aperture and a transmission aperture are provided and are positioned by a drive stage, the electron beam passes through a transmission aperture of other stencil masks while selecting the aperture on a stencil mask with a beam deflection device, the transmission aperture is provided for a mask transfer direction in succession, the stencil mask is moved while being transmitted with the beam, and other stencil mask transfer is executed when specified stencil mask aperture group is exposed. These operations are repeated so that all exposure processes are performed.
    Type: Application
    Filed: March 26, 2002
    Publication date: July 25, 2002
    Inventors: Hiroyuki Ito, Yasunari Sohda, Yasuhiro Someda, Yoshinori Nakayama, Masahide Okumura, Hidetoshi Satoh
  • Patent number: 6329665
    Abstract: In order to provide a high-speed and high accuracy cell projection exposure apparatus which increases a pattern projection number extremely, a plurality of stencil masks mounting a transferal aperture and a transmission aperture are provided and are positioned by a drive stage, the electron beam passes through a transmission aperture of other stencil masks while selecting the aperture on a stencil mask with a beam deflection device, the transmission aperture is provided for a mask transfer direction in succession, the stencil mask is moved while being transmitted with the beam, and other stencil mask transfer is executed when specified stencil mask aperture group is exposed. These operations are repeated so that all exposure processes are performed.
    Type: Grant
    Filed: July 21, 2000
    Date of Patent: December 11, 2001
    Assignee: Hitachi, Ltd.
    Inventors: Hiroyuki Ito, Yasunari Sohda, Yasuhiro Someda, Yoshinori Nakayama, Masahide Okumura, Hidetoshi Satoh
  • Patent number: 6320198
    Abstract: In order to provide a high-speed and high accuracy cell projection exposure apparatus which increases a pattern projection number extremely, a plurality of stencil masks mounting a transferal aperture and a transmission aperture are provided and are positioned by a drive stage, the electron beam passes through a transmission aperture of other stencil masks while selecting the aperture on a stencil mask with a beam deflection device, the transmission aperture is provided for a mask transfer direction in succession, the stencil mask is moved while being transmitted with the beam, and other stencil mask transfer is executed when specified stencil mask aperture group is exposed. These operations are repeated so that all exposure processes are performed.
    Type: Grant
    Filed: July 21, 2000
    Date of Patent: November 20, 2001
    Assignee: Hitachi, Ltd.
    Inventors: Hiroyuki Ito, Yasunari Sohda, Yasuhiro Someda, Yoshinori Nakayama, Masahide Okumura, Hidetoshi Satoh
  • Patent number: 6262428
    Abstract: In order to provide a high-speed and high accuracy cell projection exposure apparatus which increases a pattern projection number extremely, a plurality of stencil masks mounting a transferal aperture and a transmission aperture are provided and are positioned by a drive stage, the electron beam passes through a transmission aperture of other stencil masks while selecting the aperture on a stencil mask with a beam deflection device, the transmission aperture is provided for mask transfer direction in succession, the stencil mask is moved while being transmitted with the beam, and other stencil mask transfer is executed when specified stencil mask aperture group is exposed. These operations are repeated so that all exposure processes are performed.
    Type: Grant
    Filed: July 21, 2000
    Date of Patent: July 17, 2001
    Assignee: Hitachi, Ltd.
    Inventors: Hiroyuki Ito, Yasunari Sohda, Yasuhiro Someda, Yoshinori Nakayama, Masahide Okumura, Hidetoshi Satoh
  • Patent number: 6121625
    Abstract: In order to provide a high-speed and high accuracy cell projection exposure apparatus which increases a pattern projection number extremely, a plurality of stencil masks mounting a transferal aperture and a transmission aperture are provided and are positioned by a drive stage, the electron beam passes through a transmission aperture of other stencil masks while selecting the aperture on a stencil mask with a beam deflection device, the transmission aperture is provided for a mask transfer direction in succession, the stencil mask is moved while being transmitted with the beam, and other stencil mask transfer is executed when specified stencil mask aperture group is exposed. These operations are repeated so that all exposure processes are performed.
    Type: Grant
    Filed: May 29, 1998
    Date of Patent: September 19, 2000
    Assignee: Hitachi, Ltd.
    Inventors: Hiroyuki Ito, Yasunari Sohda, Yasuhiro Someda, Yoshinori Nakayama, Masahide Okumura, Hidetoshi Satoh
  • Patent number: 5831273
    Abstract: A method of adjusting a shaped beam in a charged particle beam writing method of writing a pattern on the surface of a written target using the above shaped beam is disclosed. The above method of adjusting the above shaped beam consists of a process for measuring the point of the center of the intensity of the shaped beam projected on the surface of the written target, a process for calculating a projected position correcting amount for correcting the projected position on the surface of the written target of the shaped beam based upon the measured point of the center of the intensity and a process for correcting the projected position on the surface of the written target of the shaped beam by the obtained projected position correcting amount.
    Type: Grant
    Filed: March 5, 1997
    Date of Patent: November 3, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Yasuhiro Someda, Yasunari Sohda, Yoshinori Nakayama, Hiroyuki Itoh
  • Patent number: 5759423
    Abstract: An electron beam writing apparatus comprises: an electron beam source for projecting an electron beam; a first mask provided with a first rectangular aperture for passing the electron beam projected by the electron beam source to shape the electron beam in a primary shaped beam having a rectangular cross section; a second mask provided with a second rectangular aperture for passing the primary shaped beam to shape the primary shaped beam in a secondary shaped beam having a rectangular cross section, and triangular apertures for passing the primary shaped beam to form a secondary shaped beam having a triangular cross section; a first electron beam deflecting system for moving the primary shaped beam on the surface of the second mask; and a second electron beam deflecting system for moving the secondary shaped beam on the surface of a workpiece on which a pattern is to be written.
    Type: Grant
    Filed: November 28, 1995
    Date of Patent: June 2, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Yasunari Sohda, Yasuhiro Someda, Hiroyuki Itoh, Katsuhiro Kawasaki, Norio Saitou
  • Patent number: 5650631
    Abstract: A blanking array is used for controlling an electron beam in an electron beam writing system. Electrodes in the array are formed in parallel and two sets of the parallel electrodes, orthogonal to one another, are used for dividing the electron beam into a plurality of individual exposure areas. The sets of parallel electrodes can be formed in one array by a wire mesh or in two separate arrays spaced closely together or farther apart at different focal point positions. The electrodes are provided to extend across an aperture, such as a square or triangular aperture. For a triangular aperture, the electrodes are made parallel to the hypotenuse of the triangle. The writing patterns are formed by combining the exposure areas. Control of each exposure area is realized by applying opposite polarity voltage to adjacent electrodes in order to deflect the portion of the beam passing between the adjacent electrodes.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 22, 1997
    Assignee: Hitachi, Ltd.
    Inventors: Yasunari Sohda, Masahide Okumura, Yasuhiro Someda, Hidetoshi Satoh, Yoshinori Nakayama, Norio Saitou
  • Patent number: 5396077
    Abstract: An electron beam apparatus used in a cell projection method has a system for correcting the electron optics. A figured electron beam that has been passed through a cell having a complex figure shape is directed onto a stage on which a substrate is positioned. A fine hole is formed in the substrate and an electron detector is positioned underneath the fine hole to receive the electrons that pass through the fine hole. The output signal of the electron detector is processed to provide a representation of the degree of focus and astigmatism correction of the electron optics. When a line and space pattern is used to shape the electron beam, the output signal from the electron detector has a series of peak intensity values that, when maximized, indicate an optimum correction of the electron optics. Optionally, a limited aperture is positioned between the substrate having a fine hole and the electron detector to limit the detection of scattered electrons that have not passed through the fine hole.
    Type: Grant
    Filed: March 16, 1994
    Date of Patent: March 7, 1995
    Assignee: Hitachi, Ltd.
    Inventors: Yasunari Sohda, Hiroyuki Itoh, Yasuhiro Someda, Yoshinori Nakayama, Hidetoshi Satoh, Genya Matsuoka