Patents by Inventor Yasuhiko Ozawa

Yasuhiko Ozawa 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: 7068834
    Abstract: The present invention has an analyzing unit including an image detection device for producing a plurality of images of a workpiece, a storage for storing detected images produced by the image detection device, and a display having a screen with a first area for displaying a plurality of detected images stored in the storage and a plurality of second areas for classifying the detected images according to features of the detected images, whereby the plurality of detected images are moved on the screen from the first area to selected second areas to classify the plurality of detected images in the second areas.
    Type: Grant
    Filed: December 1, 1999
    Date of Patent: June 27, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Yoko Ikeda, Junko Konishi, Hisafumi Iwata, Yuji Takagi, Kenji Obara, Ryo Nakagaki, Seiji Isogai, Yasuhiko Ozawa
  • Patent number: 7062081
    Abstract: In order to allow critical flaws in an inspected item to be determined early during a production process, the present invention includes the following steps: a step of detecting defects in a production process for the inspected item and storing defect positions; a step of collecting detailed defect information and storing the detailed information in association with defect positions; a step of storing positions at which flaws were generated based on a final inspection of the inspected item; a step of comparing defect positions with positions at which flaws were generated; and a step of classifying and displaying detailed information based on the comparison results.
    Type: Grant
    Filed: February 15, 2001
    Date of Patent: June 13, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Atsushi Shimoda, Ichirou Ishimaru, Yuji Takagi, Takuo Tamura, Yuichi Hamamura, Kenji Watanabe, Yasuhiko Ozawa, Seiji Isogai
  • Publication number: 20060097158
    Abstract: An object of the present invention is to provide a scanning electron microscope for reducing a process concerning inspection positioning or an input operation, thereby functioning with high precision at high speed. To accomplish the above object, the present invention provides a scanning electron microscope having a function for identifying a desired position on the basis of a pattern registered beforehand, which includes a means for setting information concerning the pattern kind, the interval between a plurality of parts constituting the pattern, and the size of parts constituting the pattern and a means for forming a pattern image composed of a plurality of parts on the basis of the information obtained by the concerned means.
    Type: Application
    Filed: December 2, 2005
    Publication date: May 11, 2006
    Inventors: Satoru Yamaguchi, Takashi Iizumi, Osamu Komuro, Hidetoshi Morokuma, Tatsuya Maeda, Juntaro Arima, Yasuhiko Ozawa
  • Patent number: 7026615
    Abstract: An operator-free and fully automated semiconductor inspection system with high throughput is realized. All conditions required for capturing and inspection are generated from design information such as CAD data. In order to perform actual inspection under the conditions, a semiconductor inspection system is composed of a navigation system for generating all the conditions required for capturing and inspection from the design information and a scanning electron microscope system for actually performing capturing and inspection. Moreover, in the case of performing a matching process between designed data and a SEM image, deformed parts are corrected by use of edge information in accordance with multiple directions and smoothing thereof. Furthermore, a SEM image corresponding to a detected position is re-registered as a template, and the matching process is thereby performed.
    Type: Grant
    Filed: February 13, 2003
    Date of Patent: April 11, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Atsushi Takane, Haruo Yoda, Shoji Yoshida, Mitsuji Ikeda, Yasuhiko Ozawa
  • Patent number: 7002151
    Abstract: An object of the present invention is to provide a scanning electron microscope for reducing a process concerning inspection positioning or an input operation, thereby functioning with high precision at high speed. To accomplish the above object, the present invention provides a scanning electron microscope having a function for identifying a desired position on the basis of a pattern registered beforehand, which includes a means for setting information concerning the pattern kind, the interval between a plurality of parts constituting the pattern, and the size of parts constituting the pattern and a means for forming a pattern image composed of a plurality of parts on the basis of the information obtained by the concerned means.
    Type: Grant
    Filed: September 3, 2004
    Date of Patent: February 21, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Satoru Yamaguchi, Takashi Iizumi, Osamu Komuro, Hidetoshi Morokuma, Tatsuya Maeda, Juntaro Arima, Yasuhiko Ozawa
  • Publication number: 20050151078
    Abstract: A method for determining a depression/protrusion, especially of a line and space pattern formed on a sample, and an apparatus therefor. A charged particle beam is scanned with its direction being inclined to the original optical axis of the charged particle beam or a sample stage is inclined, broadening of a detected signal in a line scanning direction of the charged particle beam is measured, the broadening is compared with that when the charged particle beam is scanned with its direction being parallel to the original optical axis of the charged particle beam, and a depression/protrusion of the scanned portion is determined on the basis of increase/decrease of the broadening.
    Type: Application
    Filed: February 14, 2005
    Publication date: July 14, 2005
    Inventors: Atsushi Takane, Satoru Yamaguchi, Osamu Komuro, Yasuhiko Ozawa, Hideo Todokoro
  • Publication number: 20050109937
    Abstract: An object of the present invention is to provide a scanning electron microscope for reducing a process concerning inspection positioning or an input operation, thereby functioning with high precision at high speed. To accomplish the above object, the present invention provides a scanning electron microscope having a function for identifying a desired position on the basis of a pattern registered beforehand, which includes a means for setting information concerning the pattern kind, the interval between a plurality of parts constituting the pattern, and the size of parts constituting the pattern and a means for forming a pattern image composed of a plurality of parts on the basis of the information obtained by the concerned means.
    Type: Application
    Filed: September 3, 2004
    Publication date: May 26, 2005
    Inventors: Satoru Yamaguchi, Takashi Iizumi, Osamu Komuro, Hidetoshi Morokuma, Tatsuya Maeda, Juntaro Arima, Yasuhiko Ozawa
  • Patent number: 6872943
    Abstract: A method for determining a depression/protrusion, especially of a line and space pattern formed on a sample, and an apparatus therefor. A charged particle beam is scanned with its direction being inclined to the original optical axis of the charged particle beam or a sample stage is inclined, broadening of a detected signal in a line scanning direction of the charged particle beam is measured, the broadening is compared with that when the charged particle beam is scanned with its direction being parallel to the original optical axis of the charged particle beam, and a depression/protrusion of the scanned portion is determined on the basis of increase/decrease of the broadening.
    Type: Grant
    Filed: July 11, 2002
    Date of Patent: March 29, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Atsushi Takane, Satoru Yamaguchi, Osamu Komuro, Yasuhiko Ozawa, Hideo Todokoro
  • Patent number: 6864493
    Abstract: An object of the present invention is to provide a charged particle beam apparatus and an alignment method of the charged particle beam apparatus, which make it possible to align an optical axis of a charged particle beam easily even when a state of the charged particle beam changes. The present invention comprises calculation means for calculating a deflection amount of an alignment deflector which performs an axis alignment for an objective lens, a plurality of calculation methods for calculating the deflection amount is memorized in the calculation means, and a selection means for selecting at least one of the calculation methods is provided.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: March 8, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Mitsugu Sato, Tadashi Otaka, Makoto Ezumi, Atsushi Takane, Shoji Yoshida, Satoru Yamaguchi, Yasuhiko Ozawa
  • Patent number: 6803573
    Abstract: An object of the present invention is to provide a scanning electron microscope for reducing a process concerning inspection positioning or an input operation, thereby functioning with high precision at high speed. To accomplish the above object, the present invention provides a scanning electron microscope having a function for identifying a desired position on the basis of a pattern registered beforehand, which includes a means for setting information concerning the pattern kind, the interval between a plurality of parts constituting the pattern, and the size of parts constituting the pattern and a means for forming a pattern image composed of a plurality of parts on the basis of the information obtained by the concerned means.
    Type: Grant
    Filed: July 10, 2003
    Date of Patent: October 12, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Satoru Yamaguchi, Takashi Iizumi, Osamu Komuro, Hidetoshi Morokuma, Tatsuya Maeda, Juntaro Arima, Yasuhiko Ozawa
  • Publication number: 20040124364
    Abstract: An object of the present invention is to provide a charged particle beam apparatus and an alignment method of the charged particle beam apparatus, which make it possible to align an optical axis of a charged particle beam easily even when a state of the charged particle beam changes. The present invention comprises calculation means for calculating a deflection amount of an alignment deflector which performs an axis alignment for an objective lens, a plurality of calculation methods for calculating the deflection amount is memorized in the calculation means, and a selection means for selecting at least one of the calculation methods is provided.
    Type: Application
    Filed: December 15, 2003
    Publication date: July 1, 2004
    Inventors: Mitsugu Sato, Tadashi Otaka, Makoto Ezumi, Atsushi Takane, Shoji Yoshida, Satoru Yamaguchi, Yasuhiko Ozawa
  • Patent number: 6756589
    Abstract: During closer inspection with a local defect area being magnified, it is desirable to reduce image acquisition time by making the number of stage moves as few as possible so that a defect can be observed efficiently.
    Type: Grant
    Filed: January 9, 2001
    Date of Patent: June 29, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Kenji Obara, Yuji Takagi, Atsushi Shimoda, Ryou Nakagaki, Seiji Isogai, Yasuhiko Ozawa, Hideka Banba, Kenji Watanabe, Chie Shishido
  • Publication number: 20040016882
    Abstract: An object of the present invention is to provide a scanning electron microscope for reducing a process concerning inspection positioning or an input operation, thereby functioning with high precision at high speed. To accomplish the above object, the present invention provides a scanning electron microscope having a finction for identifying a desired position on the basis of a pattern registered beforehand, which includes a means for setting information concerning the pattern kind, the interval between a plurality of parts constituting the pattern, and the size of parts constituting the pattern and a means for forming a pattern image composed of a plurality of parts on the basis of the information obtained by the concerned means.
    Type: Application
    Filed: July 10, 2003
    Publication date: January 29, 2004
    Applicant: Hitachi, Ltd,
    Inventors: Satoru Yamaguchi, Takashi Ilzumi, Osamu Komuro, Hidetoshi Morokuma, Tatsuya Maeda, Juntaro Arima, Yasuhiko Ozawa
  • Patent number: 6627888
    Abstract: An object of the present invention is to provide a scanning electron microscope for reducing a process concerning inspection positioning or an input operation, thereby functioning with high precision at high speed. To accomplish the above object, the present invention provides a scanning electron microscope having a function for identifying a desired position on the basis of a pattern registered beforehand, which includes a means for setting information concerning the pattern kind, the interval between a plurality of parts constituting the pattern, and the size of parts constituting the pattern and a means for forming a pattern image composed of a plurality of parts on the basis of the information obtained by the concerned means.
    Type: Grant
    Filed: February 23, 2001
    Date of Patent: September 30, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Satoru Yamaguchi, Takashi Iizumi, Osamu Komuro, Hidetoshi Morokuma, Tatsuya Maeda, Juntaro Arima, Yasuhiko Ozawa
  • Publication number: 20030173516
    Abstract: An operator-free and fully automated semiconductor inspection system with high throughput is realized. All conditions required for capturing and inspection are generated from design information such as CAD data. In order to perform actual inspection under the conditions, a semiconductor inspection system is composed of a navigation system for generating all the conditions required for capturing and inspection from the design information and a scanning electron microscope system for actually performing capturing and inspection. Moreover, in the case of performing a matching process between designed data and a SEM image, deformed parts are corrected by use of edge information in accordance with multiple directions and smoothing thereof Furthermore, a SEM image corresponding to a detected position is re-registered as a template, and the matching process is thereby performed.
    Type: Application
    Filed: February 13, 2003
    Publication date: September 18, 2003
    Inventors: Atsushi Takane, Haruo Yoda, Shoji Yoshida, Mitsuji Ikeda, Yasuhiko Ozawa
  • Patent number: 6553323
    Abstract: The present invention improves inspection efficiency in detailed inspections of defects performed based on inspection information from a defect inspection. Particles and defects are detected by a defect inspection device 1. If the cause of the particles and defects are to be determined by performing a detailed inspection with a details inspection device 3 using an SEM or the like, attributes are determined on the particles and defects detected by the defects inspection device 1 before the detailed inspection is performed. The attributes are determined with an attribute inspection device using an optical microscope or the like. Based on these attributes, the defects and particles are separated into those that require detailed inspection and those that do not require detailed inspection or that cannot be inspected in detail. A details inspection device 3 is used to inspect the particles and defects requiring detailed inspection.
    Type: Grant
    Filed: September 13, 2000
    Date of Patent: April 22, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Kenji Obara, Yuji Takagi, Toshifumi Honda, Ryo Nakagaki, Toshiei Kurosaki, Yasuhiko Ozawa
  • Publication number: 20030015659
    Abstract: An image picked up by a detection system capable of actualizing a three-dimensional inclination is usually poor in the signal-to-noise ratio, and it is difficult to stably detect minute defects. Images that actualize a three-dimensional inclination are picked up from opposed directions. The images are subject to subtraction and addition. The images improved in signal-to-noise ratio as compared with original images are calculated. The images calculated and improved in signal-to-noise ratio respectively of a defect portion and a reference portion are compared with each other. Regions differing in comparison results are detected as defects. As a result, minute defects can be inspected stably.
    Type: Application
    Filed: February 20, 2002
    Publication date: January 23, 2003
    Applicant: Hitachi, Ltd.
    Inventors: Toshifumi Honda, Hirohito Okuda, Yasuhiko Ozawa, Katsuhiro Kitahashi
  • Publication number: 20030010914
    Abstract: A method for determining a depression/protrusion, especially of a line and space pattern formed on a sample, and an apparatus therefor. A charged particle beam is scanned with its direction being inclined to the original optical axis of the charged particle beam or a sample stage is inclined, broadening of a detected signal in a line scanning direction of the charged particle beam is measured, the broadening is compared with that when the charged particle beam is scanned with its direction being parallel to the original optical axis of the charged particle beam, and a depression/protrusion of the scanned portion is determined on the basis of increase/decrease of the broadening.
    Type: Application
    Filed: July 11, 2002
    Publication date: January 16, 2003
    Inventors: Atsushi Takane, Satoru Yamaguchi, Osamu Komuro, Yasuhiko Ozawa, Hideo Todokoro
  • Publication number: 20020179851
    Abstract: An object of the present invention is to provide a charged particle beam apparatus and an alignment method of the charged particle beam apparatus, which make it possible to align an optical axis of a charged particle beam easily even when a state of the charged particle beam changes. The present invention comprises calculation means for calculating a deflection amount of an alignment deflector which performs an axis alignment for an objective lens, a plurality of calculation methods for calculating the deflection amount is memorized in the calculation means, and a selection means for selecting at least one of the calculation methods is provided.
    Type: Application
    Filed: February 26, 2002
    Publication date: December 5, 2002
    Inventors: Mitsugu Sato, Tadashi Otaka, Makoto Ezumi, Atsushi Takane, Shoji Yoshida, Satoru Yamaguchi, Yasuhiko Ozawa
  • Patent number: 6476388
    Abstract: The invention is a scanning electron microscope including a switching control unit for controlling to switch at least scanning unit to switch a digital image signal of a low magnification based on a wide image taking field of view to and from a digital image signal of a high magnification based on a narrow image taking field of view from an A/D conversion unit and a beam spot diameter control unit for controlling to switch a spot diameter of electron beam on a surface of an object substrate in controlling to switch the signals by the switching control unit and a defect portion analyzing method using the scanning electron microscope.
    Type: Grant
    Filed: October 19, 1999
    Date of Patent: November 5, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Ryo Nakagaki, Yuji Takagi, Atsushi Shimoda, Kenji Obara, Yasuhiko Ozawa, Hideka Bamba, Seiji Isogai, Kenji Watanabe, Chie Shishido, Toshiei Kurosaki