Patents by Inventor Tsuyoshi Sendoda

Tsuyoshi Sendoda 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: 20230142936
    Abstract: To provide more test data during the manufacture of non-volatile memories and other integrated circuits, machine learning is used to generate virtual test values. Virtual test results are interpolated for one set of tests for devices on which the test is not performed based on correlations with other sets of tests. In one example, machine learning determines a correlation study between bad block values determined at die sort and photo-limited yield (PLY) values determined inline during processing. The correlation can be applied to interpolate virtual inline PLY data for all of the memory dies, allowing for more rapid feedback on the processing parameters for manufacturing the memory dies and making the manufacturing process more efficient and accurate. In another set of embodiments, the machine learning is used to extrapolate limited metrology (e.g., critical dimension) test data to all of the memory die through interpolated virtual metrology data values.
    Type: Application
    Filed: January 10, 2023
    Publication date: May 11, 2023
    Applicant: SanDisk Technologies LLC
    Inventors: Tsuyoshi Sendoda, Yusuke Ikawa, Nagarjuna Asam, Kei Samura, Masaaki Higashitani
  • Publication number: 20230054342
    Abstract: To provide more test data during the manufacture of non-volatile memories and other integrated circuits, machine learning is used to generate virtual test values. Virtual test results are interpolated for one set of tests for devices on which the test is not performed based on correlations with other sets of tests. In one example, machine learning determines a correlation study between bad block values determined at die sort and photo-limited yield (PLY) values determined inline during processing. The correlation can be applied to interpolate virtual inline PLY data for all of the memory dies, allowing for more rapid feedback on the processing parameters for manufacturing the memory dies and making the manufacturing process more efficient and accurate. In another set of embodiments, the machine learning is used to extrapolate limited metrology (e.g., critical dimension) test data to all of the memory die through interpolated virtual metrology data values.
    Type: Application
    Filed: November 2, 2022
    Publication date: February 23, 2023
    Applicant: SanDisk Technologies LLC
    Inventors: Tsuyoshi Sendoda, Yusuke Ikawa, Nagarjuna Asam, Kei Samura, Masaaki Higashitani
  • Publication number: 20220413036
    Abstract: To provide more test data during the manufacture of non-volatile memories and other integrated circuits, machine learning is used to generate virtual test values. Virtual test results are interpolated for one set of tests for devices on which the test is not performed based on correlations with other sets of tests. In one example, machine learning determines a correlation study between bad block values determined at die sort and photo-limited yield (PLY) values determined inline during processing. The correlation can be applied to interpolate virtual inline PLY data for all of the memory dies, allowing for more rapid feedback on the processing parameters for manufacturing the memory dies and making the manufacturing process more efficient and accurate. In another set of embodiments, the machine learning is used to extrapolate limited metrology (e.g., critical dimension) test data to all of the memory die through interpolated virtual metrology data values.
    Type: Application
    Filed: June 28, 2021
    Publication date: December 29, 2022
    Applicant: SanDisk Technologies LLC
    Inventors: Yusuke Ikawa, Tsuyoshi Sendoda, Kei Samura, Masaaki Higashitani
  • Publication number: 20220415718
    Abstract: To provide more test data during the manufacture of non-volatile memories and other integrated circuits, machine learning is used to generate virtual test values. Virtual test results are interpolated for one set of tests for devices on which the test is not performed based on correlations with other sets of tests. In one example, machine learning determines a correlation study between bad block values determined at die sort and photo-limited yield (PLY) values determined inline during processing. The correlation can be applied to interpolate virtual inline PLY data for all of the memory dies, allowing for more rapid feedback on the processing parameters for manufacturing the memory dies and making the manufacturing process more efficient and accurate. In another set of embodiments, the machine learning is used to extrapolate limited metrology (e.g., critical dimension) test data to all of the memory die through interpolated virtual metrology data values.
    Type: Application
    Filed: April 21, 2022
    Publication date: December 29, 2022
    Applicant: SanDisk Technologies LLC
    Inventors: Cheng-Chung Chu, Masaaki Higashitani, Yusuke Ikawa, Seyyed Ehsan Esfahani Rashidi, Kei Samura, Tsuyoshi Sendoda, Yanli Zhang
  • Patent number: 7341644
    Abstract: There is not known a conventional method for predicting the consumed degree of consumable supplies and the thickness of deposited films without opening a processing chamber. A method for predicting the consumed degree of a consumable supply and the thickness of a deposited film according to the present invention is used for a plasma processing system 10 for carrying out a predetermined processing for a wafer W with plasma which is produced from a process gas by applying a high-frequency power, and comprises the steps of: measuring the voltages and currents of a fundamental wave and its integer-times waves of a high-frequency power supply 20, which vary in accordance with the thickness of a focus ring 21 and the thickness of a deposited film, with elapsed time; and using these measured data to carry out a multiple regression analysis to predict the thickness of the focus ring 21 and the thickness of the deposited film.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: March 11, 2008
    Assignee: Tokyo Electron Limited
    Inventors: Shinji Sakano, Tsuyoshi Sendoda
  • Patent number: 7054786
    Abstract: In an operation monitoring method according to the present invention, operation data of a plasma processing system (1) are detected for every wafer (W) by means of a plurality of detectors, and a principal component analysis using the operation data is carried out by means of a controller (10). An operation state of the plasma processing system (1) is evaluated by using the results of the principal component analysis.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: May 30, 2006
    Assignee: Tokyo Electron Limited
    Inventors: Shinji Sakano, Tsuyoshi Sendoda
  • Publication number: 20040254761
    Abstract: In an operation monitoring method according to the present invention, operation data of a plasma processing system (1) are detected for every wafer (W) by means of a plurality of detectors, and a principal component analysis using the operation data is carried out by means of a controller (10). An operation state of the plasma processing system (1) is evaluated by using the results of the principal component analysis.
    Type: Application
    Filed: June 20, 2003
    Publication date: December 16, 2004
    Inventors: Shinji Sakano, Tsuyoshi Sendoda
  • Publication number: 20040007560
    Abstract: There is not known a conventional method for predicting the consumed degree of consumable supplies and the thickness of deposited films without opening a processing chamber.
    Type: Application
    Filed: June 11, 2003
    Publication date: January 15, 2004
    Inventors: Shinji Sakano, Tsuyoshi Sendoda