Patents by Inventor Masamichi Oi

Masamichi Oi 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: 7339383
    Abstract: A fixed electrode and a movable electrode used to drive each arm are disposed at a drive unit. As a voltage is applied between the fixed electrode and the movable the electrode, a coulomb force causes the movable the electrode to move, thereby driving the arms along the closing direction. The dimensions of a sample can be measured based upon the electrostatic capacity achieved between the electrodes when the sample becomes gripped by the arms.
    Type: Grant
    Filed: July 14, 2005
    Date of Patent: March 4, 2008
    Assignees: AOI Electronics Co., Ltd., SII Nano Technology Inc.
    Inventors: Takashi Konno, Hiroki Hayashi, Toshihide Tani, Masamichi Oi, Masanao Munekane, Koji Iwasaki
  • Patent number: 7154106
    Abstract: A composite system of a scanning electron microscope (SEM) and a focused ion beam apparatus (FIB) has an FIB lens barrel for irradiating a focused ion beam to an irradiating position on a sample surface and an SEM lens barrel for observing a machining state of the machined sample surface. The FIB lens barrel has an aperture defining at least one slit of a preselected pattern so that during irradiation of the sample surface with the focused ion beam, the aperture is irradiated by the focused ion beam with a width covering the slit to thereby machine the sample surface in the form of the preselected pattern of the slit.
    Type: Grant
    Filed: February 16, 2005
    Date of Patent: December 26, 2006
    Assignee: SII NanoTechnology Inc.
    Inventors: Masamichi Oi, Takashi Ogawa
  • Publication number: 20060220659
    Abstract: A fixed electrode and a movable electrode used to drive each arm are disposed at a drive unit. As a voltage is applied between the fixed electrode and the movable the electrode, a coulomb force causes the movable the electrode to move, thereby driving the arms along the closing direction. The dimensions of a sample can be measured based upon the electrostatic capacity achieved between the electrodes when the sample becomes gripped by the arms.
    Type: Application
    Filed: July 14, 2005
    Publication date: October 5, 2006
    Applicants: AOI ELECTRONICS CO., LTD., SII NANO TECHNOLOGY INC.
    Inventors: Takashi Konno, Hiroki Hayashi, Toshihide Tani, Masamichi Oi, Masanao Munekane, Koji Iwasaki
  • Patent number: 7060397
    Abstract: A method of correcting a defective portion of an exposure window in a lithography mask, such as an EPL mask, includes a first step of irradiating a defective portion of the exposure window using a charge particle beam to perform correction processing, and a second step of irradiating another portion of the exposure window with the charged particle beam to eliminate attached matter therefrom, the attached matter consisting of particles ejected from the defective portion of the exposure window as a result of irradiation with the charged particle beam during the first step. The first step and the second step are sequentially repeated N times, wherein N is an integer of 2 or more, to thereby reduce the time needed for eliminating the attached matter.
    Type: Grant
    Filed: June 2, 2003
    Date of Patent: June 13, 2006
    Assignee: SII NanoTechnology Inc.
    Inventors: Yo Yamamoto, Kouji Iwasaki, Masamichi Oi
  • Publication number: 20050184251
    Abstract: In a complex apparatus including an FIB lens-barrel and an SEM lens-barrel, a slit of a desired shape is provided as an aperture for FIB, an ion beam of a beam width covering the slit is irradiated on a sample surface to transfer a pattern of the slit onto the sample surface to thereby perform ion beam machining.
    Type: Application
    Filed: February 16, 2005
    Publication date: August 25, 2005
    Inventors: Masamichi Oi, Takashi Ogawa
  • Patent number: 6934920
    Abstract: In a sample analysis method, positional coordinates of reference points on a surface of the sample are measured using a first device. Positional coordinates of an object on the surface of the sample to be analyzed are also measured using the first device. A sample piece containing on a surface thereof a preselected number of the reference points and the object is removed from the sample. The sample piece is then mounted on a second device different from the first device. The positional coordinates of the reference points on the surface of the sample piece are then measured using the second device. The positional coordinates of the object on the surface of the sample piece are then calculated using the positional coordinates of the reference points measured by the second device and the positional coordinates of the object measured by the first device. The object on the surface of the sample piece is then analyzed.
    Type: Grant
    Filed: October 5, 2001
    Date of Patent: August 23, 2005
    Assignee: SII NanoTechnology Inc.
    Inventors: Toshiaki Fujii, Masamichi Oi, Atsushi Yamauchi
  • Patent number: 6825468
    Abstract: A fine stencil structure correction device has a charged particle beam microscope lens-barrel which scans and corrects shapes of defect portions of a fine stencil structure sample using an etching or deposition function, and the fine stencil structure correction device further comprises transmitted beam detecting means for detecting a transmitted beam which is the charged particle beam penetrating the sample provided on a sample stage when the sample is scanned by the charged particle beam.
    Type: Grant
    Filed: July 2, 2003
    Date of Patent: November 30, 2004
    Assignee: SII NanoTechnology Inc.
    Inventors: Masamichi Oi, Tatsuya Asahata
  • Publication number: 20040031936
    Abstract: A fine stencil structure correction device has a charged particle beam microscope lens-barrel which scans and corrects shapes of defect portions of a fine stencil structure sample using an etching or deposition function, and the fine stencil structure correction device further comprises transmitted beam detecting means for detecting a transmitted beam which is the charged particle beam penetrating the sample provided on a sample stage when the sample is scanned by the charged particle beam.
    Type: Application
    Filed: July 2, 2003
    Publication date: February 19, 2004
    Inventors: Masamichi Oi, Tatsuya Asahata
  • Publication number: 20030232258
    Abstract: When amounts of re-attached matter caused by a process are caused to be deposited on pattern wiring every time processing employing a charged particle beam is carried out on a window for exposure formed on an EPL mask, elimination of such deposits is time-consuming. There is therefore provided a correction step for performing correction processing on a part to be corrected of a window 400 using a charged particle beam and an elimination step for eliminating attached matter 310 formed as a result of splashed particles from the portion to be corrected becoming attached to a region different to the part to be corrected of the window 400 during correction using a charged particle beam, with a sequential cycle of this correction step and elimination step being repeated N times (where N is an integer of 2 or more).
    Type: Application
    Filed: June 2, 2003
    Publication date: December 18, 2003
    Inventors: Yo Yamamoto, Kouji Iwasaki, Masamichi Oi
  • Publication number: 20030145291
    Abstract: In keeping with an increase of the size of wafers, etc. used in a fabrication process, a device used for inspection also becomes large, and as a result, more installation space is needed. In addition, due to the increase in the device size, there is a problem that the device becomes expensive and investment in equipment rises. The object of the present investment is to solve these problems. A sample having foreign matter or defects 4 that has already been inspected is divided so as to include a plurality of reference points 3 where positional coordinates can be determined. The divided sample 2 is inspected using a compact inspection device. At this time, the positional coordinates of the foreign matter or defects 4 are calculated from the positional coordinates of reference points 3 on the divided sample 2, are then inspected.
    Type: Application
    Filed: July 17, 2002
    Publication date: July 31, 2003
    Inventors: Toshiaki Fujii, Masamichi Oi, Atsushi Yamauchi
  • Patent number: 6486471
    Abstract: A charged particle beam apparatus has a plurality of charged particle beam generating systems disposed in a chamber and a neutralizing coil for neutralizing a first charged particle beam generating system to control the magnetic field in the path of a charged particle beam generated by a second charged particle beam system. The first charged particle beam generating system comprises one or more electron beam lens barrels, and the second charged particle beam generating system comprises one or more focused ion beam lens barrels. The neutralizing coil controls an excitation current of the objective lens of a first electron beam lens barrel.
    Type: Grant
    Filed: May 17, 1999
    Date of Patent: November 26, 2002
    Assignee: Seiko Instruments Inc.
    Inventor: Masamichi Oi
  • Patent number: 6472881
    Abstract: A liquid metal ion source has an emitter electrode for emitting ions, an extraction electrode, proximate the emitter electrode for generating a focused electric field at a tip of the emitter electrode, and a suppression electrode proximate the extraction electrode for adjusting the strength of the focused electric field generated at the tip of the emitter electrode so that metal ions are extracted from liquid metal covering the tip of the emitter electrode at a desired emission current value. A storage device stores a function defining a relationship between variation (&Dgr;Ie) in current of the emitter electrode and variation (&Dgr;Vsup) in voltage of the suppression electrode as a function &Dgr;Ie=F(&Dgr;Vsup), with the voltage (Vext) of the extraction electrode being at a fixed value.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: October 29, 2002
    Assignee: Seiko Instruments Inc.
    Inventors: Yasuhiko Sugiyama, Masamichi Oi
  • Patent number: 6452172
    Abstract: A method of controlling a magnetic field in the path of a focused charged particle beam of a composite charged particle beam apparatus having at least one focused ion beam lens barrel and at least one electron beam lens barrel comprises the steps of measuring a residual magnetic field within a sample chamber housing the lens barrels, and controlling the magnetic field in the path of the focused charged particle beam so that the magnetic field is maintained at a previously measured value.
    Type: Grant
    Filed: May 17, 1999
    Date of Patent: September 17, 2002
    Assignee: Seiko Instruments Inc.
    Inventor: Masamichi Oi
  • Patent number: 6452173
    Abstract: A magnetism preventive cylinder is provided at a focused ion beam irradiating lens barrel tip, and an electricity preventive cylinder is mounted at an electron beam irradiating lens barrel tip. Also, the magnetism preventive cylinder is provided at the electron beam irradiating lens barrel tip in place of electricity preventive cylinder. The magnetism preventive cylinder at the focused ion beam irradiating lens barrel tip prevents a focused ion beam from being affected by a magnetic field from a focused ion beam. The electricity preventive cylinder at the electron beam irradiating lens barrel tip prevents against a magnetic field from the electron beam irradiating lens barrel tip.
    Type: Grant
    Filed: May 20, 1999
    Date of Patent: September 17, 2002
    Assignee: Seiko Instruments Inc.
    Inventor: Masamichi Oi