Patents by Inventor Mayuka Iwasaki

Mayuka Iwasaki 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: 8502145
    Abstract: The invention provides a system for achieving detection and measurement of film thickness reduction of a resist pattern with high throughput which can be applied to part of in-line process management. By taking into consideration the fact that film thickness reduction of the resist pattern leads to some surface roughness of the upper surface of the resist, a film thickness reduction index value is calculated by quantifying the degree of roughness of the part corresponding to the upper surface of the resist on an electron microscope image of the resist pattern which has been used in the conventional line width measurement. The amount of film thickness reduction of the resist pattern is estimated by applying the calculated index value to a database previously made for relating a film thickness reduction index value to an amount of film thickness reduction of the resist pattern.
    Type: Grant
    Filed: July 5, 2012
    Date of Patent: August 6, 2013
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Mayuka Iwasaki, Chie Shishido, Maki Tanaka
  • Patent number: 8357897
    Abstract: A charged particle beam device enabling prevention of degradation of reproducibility of measurement caused by an increase of the beam diameter attributed to an image shift and having a function of dealing with device-to-device variation. The charged particle beam device is used for measuring the dimensions of a pattern on a specimen using a line profile obtained by detecting secondary charged particles emitted from the specimen when the specimen is scanned with a primary charged particle beam converged on the specimen. A lookup table in which the position of image shift and the variation of the beam diameter are associated is prepared in advance by actual measurement or calculation and registered. When the dimensions are measured, image processing is carried out so as to correct the line profile for the variation of the beam diameter while the lookup table is referenced, and thereby the situation where the beam diameter is effectively equal is produced irrespective of the position of the image shift.
    Type: Grant
    Filed: January 26, 2010
    Date of Patent: January 22, 2013
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Chie Shishido, Atsushi Miyamoto, Mayuka Iwasaki, Tomofumi Nishiura, Go Kotaki
  • Publication number: 20120267529
    Abstract: The invention provides a system for achieving detection and measurement of film thickness reduction of a resist pattern with high throughput which can be applied to part of in-line process management. By taking into consideration the fact that film thickness reduction of the resist pattern leads to some surface roughness of the upper surface of the resist, a film thickness reduction index value is calculated by quantifying the degree of roughness of the part corresponding to the upper surface of the resist on an electron microscope image of the resist pattern which has been used in the conventional line width measurement. The amount of film thickness reduction of the resist pattern is estimated by applying the calculated index value to a database previously made for relating a film thickness reduction index value to an amount of film thickness reduction of the resist pattern.
    Type: Application
    Filed: July 5, 2012
    Publication date: October 25, 2012
    Inventors: Mayuka Iwasaki, Chie Shishido, Maki Tanaka
  • Patent number: 8217348
    Abstract: The invention provides a system for achieving detection and measurement of film thickness reduction of a resist pattern with high throughput which can be applied to part of in-line process management. By taking into consideration the fact that film thickness reduction of the resist pattern leads to some surface roughness of the upper surface of the resist, a film thickness reduction index value is calculated by quantifying the degree of roughness of the part corresponding to the upper surface of the resist on an electron microscope image of the resist pattern which has been used in the conventional line width measurement. The amount of film thickness reduction of the resist pattern is estimated by applying the calculated index value to a database previously made for relating a film thickness reduction index value to an amount of film thickness reduction of the resist pattern.
    Type: Grant
    Filed: January 16, 2009
    Date of Patent: July 10, 2012
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Mayuka Iwasaki, Chie Shishido, Maki Tanaka
  • Publication number: 20120104254
    Abstract: A charged particle beam device enabling prevention of degradation of reproducibility of measurement caused by an increase of the beam diameter attributed to an image shift and having a function of dealing with device-to-device variation. The charged particle beam device is used for measuring the dimensions of a pattern on a specimen using a line profile obtained by detecting secondary charged particles emitted from the specimen when the specimen is scanned with a primary charged particle beam converged on the specimen. A lookup table in which the position of image shift and the variation of the beam diameter are associated is prepared in advance by actual measurement or calculation and registered. When the dimensions are measured, image processing is carried out so as to correct the line profile for the variation of the beam diameter while the lookup table is referenced, and thereby the situation where the beam diameter is effectively equal is produced irrespective of the position of the image shift.
    Type: Application
    Filed: January 26, 2010
    Publication date: May 3, 2012
    Inventors: Chie Shishido, Atsushi Miyamoto, Mayuka Iwasaki, Tomofumi Nishiura, Go Kotaki
  • Patent number: 7817860
    Abstract: Disclosed is a scanning electron microscope (SEM) for realizing high-precision dimension measurement of a sample, such as an ArF exposure photoresist, that requires the measurement of a dimension by a low S/N signal waveform. To this end, partial waveforms (or partial images) of sample signal waveforms (or an images) acquired from a dimension measurement target sample and a sample material of the same kind are registered in advance, a measurement target signal waveform (or an image) obtained from the dimension measurement target sample and the sample registration waveform are combined, and a dimension of the dimension measurement target pattern is calculated based on the combination result.
    Type: Grant
    Filed: December 2, 2008
    Date of Patent: October 19, 2010
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Chie Shishido, Mayuka Iwasaki, Hiroki Kawada
  • Publication number: 20090224152
    Abstract: Disclosed is a scanning electron microscope (SEM) for realizing high-precision dimension measurement of a sample, such as an ArF exposure photoresist, that requires the measurement of a dimension by a low S/N signal waveform. To this end, partial waveforms (or partial images) of sample signal waveforms (or an images) acquired from a dimension measurement target sample and a sample material of the same kind are registered in advance, a measurement target signal waveform (or an image) obtained from the dimension measurement target sample and the sample registration waveform are combined, and a dimension of the dimension measurement target pattern is calculated based on the combination result.
    Type: Application
    Filed: December 2, 2008
    Publication date: September 10, 2009
    Inventors: Chie SHISHIDO, Mayuka IWASAKI, Hiroki KAWADA
  • Publication number: 20090212211
    Abstract: The invention provides a system for achieving detection and measurement of film thickness reduction of a resist pattern with high throughput which can be applied to part of in-line process management. By taking into consideration the fact that film thickness reduction of the resist pattern leads to some surface roughness of the upper surface of the resist, a film thickness reduction index value is calculated by quantifying the degree of roughness of the part corresponding to the upper surface of the resist on an electron microscope image of the resist pattern which has been used in the conventional line width measurement. The amount of film thickness reduction of the resist pattern is estimated by applying the calculated index value to a database previously made for relating a film thickness reduction index value to an amount of film thickness reduction of the resist pattern.
    Type: Application
    Filed: January 16, 2009
    Publication date: August 27, 2009
    Inventors: Mayuka IWASAKI, Chie Shishido, Maki Tanaka
  • Patent number: 7460714
    Abstract: Disclosed is a scanning electron microscope (SEM) for realizing high-precision dimension measurement of a sample, such as an ArF exposure photoresist, that requires the measurement of a dimension by a low S/N signal waveform. To this end, partial waveforms (or partial images) of sample signal waveforms (or an images) acquired from a dimension measurement target sample and a sample material of the same kind are registered in advance, a measurement target signal waveform (or an image) obtained from the dimension measurement target sample and the sample registration waveform are combined, and a dimension of the dimension measurement target pattern is calculated based on the combination result.
    Type: Grant
    Filed: April 20, 2007
    Date of Patent: December 2, 2008
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Chie Shishido, Mayuka Iwasaki, Hiroki Kawada
  • Publication number: 20070286494
    Abstract: Disclosed is a scanning electron microscope (SEM) for realizing high-precision dimension measurement of a sample, such as an ArF exposure photoresist, that requires the measurement of a dimension by a low S/N signal waveform. To this end, partial waveforms (or partial images) of sample signal waveforms (or an images) acquired from a dimension measurement target sample and a sample material of the same kind are registered in advance, a measurement target signal waveform (or an image) obtained from the dimension measurement target sample and the sample registration waveform are combined, and a dimension of the dimension measurement target pattern is calculated based on the combination result.
    Type: Application
    Filed: April 20, 2007
    Publication date: December 13, 2007
    Inventors: Chie Shishido, Mayuka Iwasaki, Hiroki Kawada
  • Patent number: 7269287
    Abstract: Disclosed is a scanning electron microscope (SEM) for realizing high-precision dimension measurement of a sample, such as an ArF exposure photoresist, that requires the measurement of a dimension by a low S/N signal waveform. To this end, partial waveforms (or partial images) of sample signal waveforms (or an images) acquired from a dimension measurement target sample and a sample material of the same kind are registered in advance, a measurement target signal waveform (or an image) obtained from the dimension measurement target sample and the sample registration waveform are combined, and a dimension of the dimension measurement target pattern is calculated based on the combination result.
    Type: Grant
    Filed: January 3, 2006
    Date of Patent: September 11, 2007
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Chie Shishido, Mayuka Iwasaki, Hiroki Kawada
  • Publication number: 20070092130
    Abstract: Disclosed is a scanning electron microscope (SEM) for realizing high-precision dimension measurement of a sample, such as an ArF exposure photoresist, that requires the measurement of a dimension by a low S/N signal waveform. To this end, partial waveforms (or partial images) of sample signal waveforms (or an images) acquired from a dimension measurement target sample and a sample material of the same kind are registered in advance, a measurement target signal waveform (or an image) obtained from the dimension measurement target sample and the sample registration waveform are combined, and a dimension of the dimension measurement target pattern is calculated based on the combination result.
    Type: Application
    Filed: January 3, 2006
    Publication date: April 26, 2007
    Inventors: Chie Shishido, Mayuka Iwasaki, Hiroki Kawada