Patents by Inventor Fardad Hashemi

Fardad Hashemi 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: 11788833
    Abstract: Method and system for defining basis functions for fitting distortions of profiles of objects in a batch, that has undergone a fabrication process, in a manner adaptable to the fabrication process to reduce the errors between profiles approximated with the use of such basis functions and actual object profiles. Process-specific individual basis functions are defined based on spatially-dense measurement of objects from training sub-set of the batch and applying learning algorithm to results of such measurement. Advantages of process-adaptable basis functions over generic basis functions for fitting distortion shapes of objects include higher accuracy of fitting either at larger or a fewer locations across the object.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: October 17, 2023
    Assignee: Nikon Corporation
    Inventors: Travis D. Bow, Henry Pang, Fardad A. Hashemi
  • Patent number: 10990024
    Abstract: Lithographic exposure tool and method for operating thereof are provided that includes modification of the tool (assessed based on the measurements of geometrical distortions caused, in the tool, by the exposure process and used to train the exposure tool) to ensure that such geometrical distortions are reduced for any chosen exposure process. The method includes processing first data (representing distortions caused by initial exposure run(s)) to estimate second data (representing distortions that would occur for another exposure run); and forming a modified exposure tool by changing at least one of a) a geometrical path or a path along which the workpiece stage is repositioned during the operation of the exposure tool; b) one or more of a presence, position, orientation, size and shape of an optical component of an optical projection sub-system of the optical system of the exposure tool; and c) a parameter of scanning synchronization of the exposure tool.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: April 27, 2021
    Assignee: Nikon Research Corporation of America
    Inventors: Travis Bow, Fardad Hashemi, Henry Kin Heng Pang
  • Publication number: 20200292304
    Abstract: Method and system for defining basis functions for fitting distortions of profiles of objects in a batch, that has undergone a fabrication process, in a manner adaptable to the fabrication process to reduce the errors between profiles approximated with the use of such basis functions and actual object profiles. Process-specific individual basis functions are defined based on spatially-dense measurement of objects from training sub-set of the batch and applying learning algorithm to results of such measurement. Advantages of process-adaptable basis functions over generic basis functions for fitting distortion shapes of objects include higher accuracy of fitting either at larger or a fewer locations across the object.
    Type: Application
    Filed: May 29, 2020
    Publication date: September 17, 2020
    Inventors: Travis D. Bow, Henry Pang, Fardad A. Hashemi
  • Patent number: 10718606
    Abstract: Method and system for defining basis functions for fitting distortions of profiles of objects in a batch, that has undergone a fabrication process, in a manner adaptable to the fabrication process to reduce the errors between profiles approximated with the use of such basis functions and actual object profiles. Process-specific individual basis functions are defined based on spatially-dense measurement of objects from training sub-set of the batch and applying learning algorithm to results of such measurement. Advantages of process-adaptable basis functions over generic basis functions for fitting distortion shapes of objects include higher accuracy of fitting either at larger or a fewer locations across the object.
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: July 21, 2020
    Assignee: Nikon Corporation
    Inventors: Travis D. Bow, Henry Pang, Fardad A. Hashemi
  • Publication number: 20200096872
    Abstract: Lithographic exposure tool and method for operating thereof are provided that includes modification of the tool (assessed based on the measurements of geometrical distortions caused, in the tool, by the exposure process and used to train the exposure tool) to ensure that such geometrical distortions are reduced for any chosen exposure process. The method includes processing first data (representing distortions caused by initial exposure run(s)) to estimate second data (representing distortions that would occur for another exposure run); and forming a modified exposure tool by changing at least one of a) a geometrical path or a path along which the workpiece stage is repositioned during the operation of the exposure tool; b) one or more of a presence, position, orientation, size and shape of an optical component of an optical projection sub-system of the optical system of the exposure tool; and c) a parameter of scanning synchronization of the exposure tool.
    Type: Application
    Filed: August 29, 2019
    Publication date: March 26, 2020
    Inventors: Travis Bow, Fardad Hashemi, Henry Kin Heng Pang
  • Patent number: 10444643
    Abstract: Lithographic exposure tool and method for operating thereof that includes modification of the tool (assessed based on the measurements of geometrical distortions caused, in the tool, by the exposure process and used to train the exposure tool) to ensure that such geometrical distortions are reduced for any chosen exposure process. The method includes processing first data (representing distortions caused by initial exposure run(s)) to estimate second data representing distortions that would occur for another exposure run); and forming a modified exposure tool by changing at least one of a) a geometrical path is a path along which the workpiece stage is repositioned during the operation of the exposure tool; b) one or more of a presence, position, orientation, size and shape of an optical component of an optical projection sub-system of the optical system of the exposure tool; and c) a parameter of scanning synchronization of the exposure tool.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: October 15, 2019
    Assignee: Nikon Research Corporation of America
    Inventors: Travis Bow, Fardad Hashemi, Henry Kin Heng Pang
  • Patent number: 10259104
    Abstract: A clamp for selectively inhibiting movement of a first object relative to a second object includes (i) a first clamp component coupled to the first object; (ii) a second clamp component coupled to the second object; and (iii) a fluid source that directs a fluid to the second clamp component to create a fluid bearing between the first clamp component and the second clamp component that allows for movement of the first clamp component relative to the second clamp component, and wherein the fluid source directs less fluid to the second clamp component to inhibit relative movement.
    Type: Grant
    Filed: October 28, 2014
    Date of Patent: April 16, 2019
    Assignee: NIKON CORPORATION
    Inventors: Fardad A. Hashemi, Travis D. Bow, Patrick Chang
  • Publication number: 20180275525
    Abstract: Lithographic exposure tool and method for operating thereof that includes modification of the tool (assessed based on the measurements of geometrical distortions caused, in the tool, by the exposure process and used to train the exposure tool) to ensure that such geometrical distortions are reduced for any chosen exposure process. The method includes processing first data (representing distortions caused by initial exposure run(s)) to estimate second data representing distortions that would occur for another exposure run); and forming a modified exposure tool by changing at least one of a) a geometrical path is a path along which the workpiece stage is repositioned during the operation of the exposure tool; b) one or more of a presence, position, orientation, size and shape of an optical component of an optical projection sub-system of the optical system of the exposure tool; and c) a parameter of scanning synchronization of the exposure tool.
    Type: Application
    Filed: March 26, 2018
    Publication date: September 27, 2018
    Applicant: NIKON RESEARCH CORPORATION OF AMERICA
    Inventors: Travis Bow, Fardad Hashemi, Henry Kin Heng Pang
  • Patent number: 9947637
    Abstract: A system and method for clamping wafers together in alignment using pressure. The system and method involves holding a first wafer and a second wafer together in alignment using a wafer clamp within an ambient environment maintained at a first pressure and creating a second pressure at least partially around and between the first wafer and the second wafer held together by the wafer clamp, wherein the first pressure is greater than the second pressure. The first wafer and the second wafer are clamped together in alignment using a pneumatic force created by a pressure differential between the first pressure and the second pressure.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: April 17, 2018
    Assignee: NIKON CORPORATION
    Inventors: Alton H. Phillips, Fardad A. Hashemi
  • Publication number: 20160305772
    Abstract: Method and system for defining basis functions for fitting distortions of profiles of objects in a batch, that has undergone a fabrication process, in a manner adaptable to the fabrication process to reduce the errors between profiles approximated with the use of such basis functions and actual object profiles. Process-specific individual basis functions are defined based on spatially-dense measurement of objects from training sub-set of the batch and applying learning algorithm to results of such measurement. Advantages of process-adaptable basis functions over generic basis functions for fitting distortion shapes of objects include higher accuracy of fitting either at larger or a fewer locations across the object.
    Type: Application
    Filed: April 14, 2016
    Publication date: October 20, 2016
    Inventors: Travis D. Bow, Henry Pang, Fardad A. Hashemi
  • Patent number: 9341942
    Abstract: A chamber assembly (26) for providing a sealed chamber (40) adjacent to a workpiece (28) to counteract the influence of gravity on the workpiece (28) includes a chamber housing (244), and a seal assembly (33) that expands and/or contracts to better seal against the workpiece (28). Further, the chamber assembly (26) can include one or more transducer assemblies (34) that expand or contract to quickly respond to leaks or injections of fluid in chamber assembly (26) to maintain a constant and stable chamber pressure in the chamber assembly (26). Moreover, the chamber assembly (26) can utilize a pressure source (35) that directs a lager amount of fluid (374) through a fluid passageway (368) to accurately maintain the pressure within the chamber assembly (26).
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: May 17, 2016
    Assignee: Nikon Research Corporation of America
    Inventors: Fardad Hashemi, Douglas C. Watson, Lorri L. Watson
  • Publication number: 20150122412
    Abstract: A system and method for clamping wafers together in alignment using pressure. The system and method involves holding a first wafer and a second wafer together in alignment using a wafer clamp within an ambient environment maintained at a first pressure and creating a second pressure at least partially around and between the first wafer and the second wafer held together by the wafer clamp, wherein the first pressure is greater than the second pressure. The first wafer and the second wafer are clamped together in alignment using a pneumatic force created by a pressure differential between the first pressure and the second pressure.
    Type: Application
    Filed: October 21, 2014
    Publication date: May 7, 2015
    Inventors: Alton H. PHILLIPS, Fardad A. HASHEMI
  • Publication number: 20150115513
    Abstract: A clamp for selectively inhibiting movement of a first object relative to a second object includes (i) a first clamp component coupled to the first object; (ii) a second clamp component coupled to the second object; and (iii) a fluid source that directs a fluid to the second clamp component to create a fluid bearing between the first clamp component and the second clamp component that allows for movement of the first clamp component relative to the second clamp component, and wherein the fluid source directs less fluid to the second clamp component to inhibit relative movement.
    Type: Application
    Filed: October 28, 2014
    Publication date: April 30, 2015
    Inventors: Fardad A. Hashemi, Travis D. Bow, Patrick Chang
  • Patent number: 8941814
    Abstract: An exemplary device includes first and second portions that are movably connected together by first and second sets, respectively, of multiple blades interleaved with each other at an overlap region. When the overlap region is compressed, displacement of the first and second portions relative to each other is prevented so as to provide relatively high stiffness in first and second orthogonal directions (e.g., z- and y-directions) and relatively low stiffness in a third orthogonal direction (e.g., x-direction). The device can be used in coordination with an actuator, wherein operation of the actuator and compression of the overlap region are automated.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: January 27, 2015
    Assignee: Nikon Corporation
    Inventors: Fardad Hashemi, Christopher S. Margeson, Lorri L. Watson
  • Patent number: 8772999
    Abstract: An electromechanical resonating structure, including: first level major elements coupled to each other to form a second or higher level hierarchy; and first level sub-micron size minor elements with a characteristic frequency and coupled to each of the first level major elements to form a second level hierarchy in which a signal is effectively amplified by vibrating each of the plurality of major elements in at least one mode determined by the geometry and dimensions of the first level sub-micron minor elements.
    Type: Grant
    Filed: October 11, 2007
    Date of Patent: July 8, 2014
    Assignee: Sand 9, Inc.
    Inventors: Pritiraj Mohanty, Alexei Gaidarzhy, Guiti Zolfagharkhani, Fardad Hashemi
  • Publication number: 20130250271
    Abstract: A stage assembly (10) that moves a device (22) includes a device holder (20) that selectively retains the device (22). The device holder (20) includes a pivot (330) that engages the device (22), and a pressure source (326) that creates (i) a pressure controlled, distal zone (336A) that is at a distal pressure, and (ii) a pressure controlled, proximal zone (338A) that is at a proximal pressure. The distal zone (336A) generates a distal moment (344A) and the proximal zone (336B) generates a proximal moment (346A) that can be used to control the shape of the device (22).
    Type: Application
    Filed: February 15, 2013
    Publication date: September 26, 2013
    Applicant: NIKON CORPORATION
    Inventors: Alton H. Phillips, Fardad Hashemi, Takeshi Matsuda
  • Publication number: 20130155385
    Abstract: A chamber assembly (26) for providing a sealed chamber (40) adjacent to a workpiece (28) to counteract the influence of gravity on the workpiece (28) includes a chamber housing (244), and a seal assembly (33) that expands and/or contracts to better seal against the workpiece (28). Further, the chamber assembly (26) can include one or more transducer assemblies (34) that expand or contract to quickly respond to leaks or injections of fluid in chamber assembly (26) to maintain a constant and stable chamber pressure in the chamber assembly (26). Moreover, the chamber assembly (26) can utilize a pressure source (35) that directs a lager amount of fluid (374) through a fluid passageway (368) to accurately maintain the pressure within the chamber assembly (26).
    Type: Application
    Filed: August 23, 2011
    Publication date: June 20, 2013
    Applicant: NIKON CORPORATION
    Inventors: Fardad Hashemi, Douglas C. Watson
  • Patent number: 8441615
    Abstract: A precision assembly (10) for fabricating a substrate (42) includes a precision fabrication apparatus (12), a pedestal assembly (14) and a suspension system (16). The precision fabrication apparatus (12) fabricates the substrate (42). The pedestal assembly (14) supports at least a portion of the fabrication apparatus (12). The suspension system (16) inhibits the transfer of motion between the mounting base (20) and the pedestal assembly (14). The suspension system (16) can include (i) a first boom (380) that is coupled to the mounting base (20) and the pedestal assembly (14), the first boom (380) being pivotable coupled to at least one of the mounting base (20) and the pedestal assembly (14), and (ii) a first resilient assembly (382) that is coupled between the mounting base (20) and at least one of the first boom (380) and the pedestal assembly (14). The first resilient assembly (382) can function similar to a zero length spring over an operational range of the resilient assembly (382).
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: May 14, 2013
    Assignee: Nikon Corporation
    Inventors: Fardad A. Hashemi, Douglas C. Watson, Christopher Margeson
  • Publication number: 20120320362
    Abstract: An exemplary device includes first and second portions that are movably connected together by first and second sets, respectively, of multiple blades interleaved with each other at an overlap region. When the overlap region is compressed, displacement of the first and second portions relative to each other is prevented so as to provide relatively high stiffness in first and second orthogonal directions (e.g., z- and y-directions) and relatively low stiffness in a third orthogonal direction (e.g., x-direction). The device can be used in coordination with an actuator, wherein operation of the actuator and compression of the overlap region are automated.
    Type: Application
    Filed: June 19, 2012
    Publication date: December 20, 2012
    Inventors: Douglas C. Watson, Fardad Hashemi, Christopher S. Margeson, Lorri L. Watson
  • Publication number: 20110121682
    Abstract: An electromechanical resonating structure, including: first level major elements coupled to each other to form a second or higher level hierarchy; and first level sub-micron size minor elements with a characteristic frequency and coupled to each of the first level major elements to form a second level hierarchy in which a signal is effectively amplified by vibrating each of the plurality of major elements in at least one mode determined by the geometry and dimensions of the first level sub-micron minor elements.
    Type: Application
    Filed: October 11, 2007
    Publication date: May 26, 2011
    Applicant: Sand9, Inc.
    Inventors: Pritiraj Mohanty, Alexei Gaidarzhy, Guiti Zolfagharkhani, Fardad Hashemi