Patents by Inventor Yuki Ojima

Yuki Ojima 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: 20230230886
    Abstract: To provide a technique capable of quantitatively grasping a change in three-dimensional shape including a cross-sectional shape of a pattern within a surface of a wafer or between wafers in a non-destructive manner before cross-sectional observation.
    Type: Application
    Filed: December 14, 2022
    Publication date: July 20, 2023
    Applicant: Hitachi High-Tech Corporation
    Inventors: Kenji YASUI, Mayuka OSAKI, Hitoshi NAMAI, Yuki OJIMA, Wataru NAGATOMO, Masami IKOTA, Maki KIMURA
  • Publication number: 20160140287
    Abstract: A template creation device for a sample observation device for creating a template for image processing using design data includes a storage unit for storing process information in which information concerning a plurality of process processings is defined, and a template creation unit for processing the design data using the process information and creating the template for the image processing.
    Type: Application
    Filed: May 19, 2014
    Publication date: May 19, 2016
    Inventors: Yuki OJIMA, Shigeki SUKEGAWA, Yuichi ABE, Toshikazu KAWAHARA, Wataru NAGATOMO, Shinji KUBO
  • Patent number: 8487253
    Abstract: An object of the present invention is to provide a scanning electron microscope suitable for monitoring apparatus conditions of the microscope itself, irrespective of the presence of charge-up, specimen inclination, and the like. In order to achieve the object, proposed is a scanning electron microscope including a function to monitor the apparatus conditions on the basis of information obtained with an electron beam reflected before reaching a specimen. Specifically, for example, while applying a negative voltage to the specimen to reflect the electron beam before the electron beam reaches the specimen, and simultaneously supplying a predetermined signal to a deflector for alignment, the scanning electron microscope monitors changes of the detected positions of the reflected electrons of the electron beam. If the above-mentioned predetermined signal is under the condition where an alignment is properly performed, the changes of the detected positions of the electrons reflect deviation of an axis.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: July 16, 2013
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Minoru Yamazaki, Akira Ikegami, Hideyuki Kazumi, Manabu Yano, Kazunari Asao, Takeshi Mizuno, Yuki Ojima
  • Publication number: 20120061566
    Abstract: An object of the present invention is to provide a scanning electron microscope suitable for monitoring apparatus conditions of the microscope itself, irrespective of the presence of charge-up, specimen inclination, and the like. In order to achieve the object, proposed is a scanning electron microscope including a function to monitor the apparatus conditions on the basis of information obtained with an electron beam reflected before reaching a specimen. Specifically, for example, while applying a negative voltage to the specimen to reflect the electron beam before the electron beam reaches the specimen, and simultaneously supplying a predetermined signal to a deflector for alignment, the scanning electron microscope monitors changes of the detected positions of the reflected electrons of the electron beam. If the above-mentioned predetermined signal is under the condition where an alignment is properly performed, the changes of the detected positions of the electrons reflect deviation of an axis.
    Type: Application
    Filed: November 18, 2011
    Publication date: March 15, 2012
    Applicant: Hitachi High-Technologies Corporation
    Inventors: Minoru YAMAZAKI, Akira IKEGAMI, Hideyuki KAZUMI, Manabu YANO, Kazunari ASAO, Takeshi MIZUNO, Yuki OJIMA
  • Patent number: 8080790
    Abstract: An object of the present invention is to provide a scanning electron microscope suitable for monitoring apparatus conditions of the microscope itself, irrespective of the presence of charge-up, specimen inclination, and the like. In order to achieve the object, proposed is a scanning electron microscope including a function to monitor the apparatus conditions on the basis of information obtained with an electron beam reflected before reaching a specimen. Specifically, for example, while applying a negative voltage to the specimen to reflect the electron beam before the electron beam reaches the specimen, and simultaneously supplying a predetermined signal to a deflector for alignment, the scanning electron microscope monitors changes of the detected positions of the reflected electrons of the electron beam. If the above-mentioned predetermined signal is under the condition where an alignment is properly performed, the changes of the detected positions of the electrons reflect deviation of an axis.
    Type: Grant
    Filed: February 25, 2009
    Date of Patent: December 20, 2011
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Minoru Yamazaki, Akira Ikegami, Hideyuki Kazumi, Manabu Yano, Kazunari Asao, Takeshi Mizuno, Yuki Ojima
  • Patent number: 7723681
    Abstract: For the purpose of repeatedly observing the bottom of a contact hole with a high aspect ratio, the potential of an electrostatic charge in each of a pattern to be observed and a vicinity of a range to be observed is stabilized by pre-charging a range on which to irradiate a beam of electrons while changing the range on a step-by-step basis.
    Type: Grant
    Filed: October 12, 2007
    Date of Patent: May 25, 2010
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Yuki Ojima, Satoru Iwama, Akira Ikegami
  • Publication number: 20090224170
    Abstract: An object of the present invention is to provide a scanning electron microscope suitable for monitoring apparatus conditions of the microscope itself, irrespective of the presence of charge-up, specimen inclination, and the like. In order to achieve the object, proposed is a scanning electron microscope including a function to monitor the apparatus conditions on the basis of information obtained with an electron beam reflected before reaching a specimen. Specifically, for example, while applying a negative voltage to the specimen to reflect the electron beam before the electron beam reaches the specimen, and simultaneously supplying a predetermined signal to a deflector for alignment, the scanning electron microscope monitors changes of the detected positions of the reflected electrons of the electron beam. If the above-mentioned predetermined signal is under the condition where an alignment is properly performed, the changes of the detected positions of the electrons reflect deviation of an axis.
    Type: Application
    Filed: February 25, 2009
    Publication date: September 10, 2009
    Inventors: Minoru YAMAZAKI, Akira Ikegami, Hideyuki Kazumi, Manabu Yano, Kazunari Asao, Takeshi Mizuno, Yuki Ojima
  • Publication number: 20080265160
    Abstract: For the purpose of repeatedly observing the bottom of a contact hole with a high aspect ratio, the potential of an electrostatic charge in each of a pattern to be observed and a vicinity of a range to be observed is stabilized by pre-charging a range on which to irradiate a beam of electrons while changing the range on a step-by-step basis.
    Type: Application
    Filed: October 12, 2007
    Publication date: October 30, 2008
    Applicant: Hitachi High-Technologies Corporation
    Inventors: Yuki OJIMA, Satoru Iwama, Akira Ikegami
  • Patent number: 6929892
    Abstract: In monitoring of an exposure process, a highly isolative pattern greatly changed in a shape of cross section by fluctuations in the exposure dose and the focal position is an observation target. Especially, to detect a change in a resist shape of cross section from a tapered profile to an inverse tapered profile, one of the following observation methods is employed to obtain observation data: (1) a tilt image of a resist pattern is imaged by using tilt imaging electron microscopy, (2) an electron beam image of a resist pattern is imaged under imaging conditions for generating asymmetry on an electron beam signal waveform, and (3) scattering characteristic data of a resist pattern is obtained by an optical measurement system. The observation data is applied to model data created beforehand in accordance with the exposure conditions to estimate fluctuations in the exposure dose and the focal position.
    Type: Grant
    Filed: July 20, 2004
    Date of Patent: August 16, 2005
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Chie Shishido, Hidetoshi Morokuma, Yuki Ojima, Maki Tanaka, Wataru Nagatomo
  • Publication number: 20050037271
    Abstract: In monitoring of an exposure process, a highly isolative pattern greatly changed in a shape of cross section by fluctuations in the exposure dose and the focal position is an observation target. Especially, to detect a change in a resist shape of cross section from a tapered profile to an inverse tapered profile, one of the following observation methods is employed to obtain observation data: (1) a tilt image of a resist pattern is imaged by using tilt imaging electron microscopy, (2) an electron beam image of a resist pattern is imaged under imaging conditions for generating asymmetry on an electron beam signal waveform, and (3) scattering characteristic data of a resist pattern is obtained by an optical measurement system. The observation data is applied to model data created beforehand in accordance with the exposure conditions to estimate fluctuations in the exposure dose and the focal position.
    Type: Application
    Filed: July 20, 2004
    Publication date: February 17, 2005
    Inventors: Chie Shishido, Hidetoshi Morokuma, Yuki Ojima, Maki Tanaka, Wataru Nagatomo