Patents by Inventor Hikaru Yamamura

Hikaru Yamamura 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: 11556114
    Abstract: A drawing apparatus according to the embodiment includes a chamber configured to house a processing target; a drawing part configured to draw a predetermined pattern on the processing target with a charged particle beam; a resistance measuring part configured to measure a resistance value of the processing target via a grounding member grounding the processing target in the chamber; a receiver configured to receive earthquake information; a controller configured to stop a drawing process in the chamber when the receiver receives the earthquake information; and an arithmetic processor configured to determine whether the processing target is grounded on a basis of the resistance value from the resistance measuring part, wherein the controller resumes the drawing process when the arithmetic processor determines that the processing target is grounded after the drawing process is stopped.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: January 17, 2023
    Assignee: NuFlare Technology, Inc.
    Inventor: Hikaru Yamamura
  • Patent number: 10971331
    Abstract: In one embodiment, a writing data generation method is for generating writing data used by a multi-charged particle beam writing apparatus. The writing data generation method includes referring to library data in which a vertex sequence including a plurality of vertices is registered, and extracting a portion of an outer line of a figure contained in design data, the portion corresponding to the vertex sequence, and representing the extracted portion by information which identifies the vertex sequence and information which indicates a connection method for the plurality of vertices of the vertex sequence, and generating the writing data.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: April 6, 2021
    Assignee: NuFlare Technology, Inc.
    Inventors: Shinji Sakamoto, Kenichi Yasui, Chiaki Inaba, Hikaru Yamamura, Satoru Fukushima, Yoshinori Akahane
  • Publication number: 20200264588
    Abstract: A drawing apparatus according to the embodiment includes a chamber configured to house a processing target; a drawing part configured to draw a predetermined pattern on the processing target with a charged particle beam; a resistance measuring part configured to measure a resistance value of the processing target via a grounding member grounding the processing target in the chamber; a receiver configured to receive earthquake information; a controller configured to stop a drawing process in the chamber when the receiver receives the earthquake information; and an arithmetic processor configured to determine whether the processing target is grounded on a basis of the resistance value from the resistance measuring part, wherein the controller resumes the drawing process when the arithmetic processor determines that the processing target is grounded after the drawing process is stopped.
    Type: Application
    Filed: February 12, 2020
    Publication date: August 20, 2020
    Applicant: NuFlare Technology, Inc.
    Inventor: Hikaru YAMAMURA
  • Publication number: 20200051782
    Abstract: In one embodiment, a writing data generation method is for generating writing data used by a multi-charged particle beam writing apparatus. The writing data generation method includes referring to library data in which a vertex sequence including a plurality of vertices is registered, and extracting a portion of an outer line of a figure contained in design data, the portion corresponding to the vertex sequence, and representing the extracted portion by information which identifies the vertex sequence and information which indicates a connection method for the plurality of vertices of the vertex sequence, and generating the writing data.
    Type: Application
    Filed: June 21, 2019
    Publication date: February 13, 2020
    Applicant: NuFlare Technology, Inc.
    Inventors: Shinji SAKAMOTO, Kenichi Yasui, Chiaki Inaba, Hikaru Yamamura, Satoru Fukushima, Yoshinori Akahane
  • Patent number: 9460892
    Abstract: A charged particle beam writing method according to embodiments of the present disclosure includes: storing in a charged particle beam writing apparatus a position coordinate at which a drift amount is diagnosed; storing in the charged particle beam writing apparatus first and second time interval patterns which define time intervals to diagnose the drift amount of the charged particle beam; performing first writing of irradiating a target object with the charged particle beam, and writing a writing pattern on the target object while diagnosing the drift amount based on the first time interval pattern during the writing; and performing second writing of writing a predetermined writing pattern while diagnosing the drift amount when the writing reaches the position coordinate and diagnosing the drift amount based on the second time interval pattern during the writing after the writing reaches the position coordinate.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: October 4, 2016
    Assignee: NuFlare Technology, Inc.
    Inventors: Sumito Nakada, Hikaru Yamamura, Osamu Iizuka, Hideyuki Tsurumaki
  • Patent number: 9236154
    Abstract: A charged-particle beam drawing method includes: storing a plurality of time interval patterns defining time intervals for performing a diagnosis of a drift amount of charged-particle beam; drawing a predetermined drawing pattern on a sample by irradiating the beam on the sample; receiving first event information including occurrence of event and type of event; acquiring region information specifying a region being drawn by the beam; selecting a specific time interval pattern from the plurality of time interval patterns based on the type of the event of the first event information and the region information; diagnosing the drift amount of the beam based on the specific time interval pattern, until second event information is received, the second event information includes occurrence of event and type of event; and drawing a predetermined drawing pattern on the sample while performing a drift correction of the charged-particle beam, based on the diagnosing.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: January 12, 2016
    Assignee: NUFLARE TECHNOLOGY, INC.
    Inventors: Sumito Nakada, Osamu Iizuka, Hikaru Yamamura
  • Publication number: 20140166869
    Abstract: A charged particle beam writing method according to embodiments of the present disclosure includes: storing in a charged particle beam writing apparatus a position coordinate at which a drift amount is diagnosed; storing in the charged particle beam writing apparatus first and second time interval patterns which define time intervals to diagnose the drift amount of the charged particle beam; performing first writing of irradiating a target object with the charged particle beam, and writing a writing pattern on the target object while diagnosing the drift amount based on the first time interval pattern during the writing; and performing second writing of writing a predetermined writing pattern while diagnosing the drift amount when the writing reaches the position coordinate and diagnosing the drift amount based on the second time interval pattern during the writing after the writing reaches the position coordinate.
    Type: Application
    Filed: November 26, 2013
    Publication date: June 19, 2014
    Applicant: NuFlare Technology, Inc.
    Inventors: Sumito NAKADA, Hikaru Yamamura, Osamu IIzuka, Hideyuki Tsurumaki