Patents by Inventor Stanislav S. Todorov

Stanislav S. Todorov 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: 11830739
    Abstract: Provided herein are approaches for forming an image sensor with increased well depth due to cryogenic ion channeling of ultra-high energy (UHE) ions. In some embodiments, a method may include providing a wafer of a semiconductor device, the semiconductor device including a photoelectric conversion region, and cooling the wafer to a temperature less than ?50° C. The method may further include performing an ion implant to the photoelectric conversion region to form a photodiode well after cooling the wafer.
    Type: Grant
    Filed: October 7, 2020
    Date of Patent: November 28, 2023
    Assignee: Applied Materials, Inc.
    Inventors: Hans-Joachim L. Gossmann, Stanislav S. Todorov, Hiroyuki Ito
  • Publication number: 20230287561
    Abstract: A system comprising a spinning disk is disclosed. The system comprises a semiconductor processing system, such as a high energy implantation system. The semiconductor processing system produces a spot ion beam, which is directed to a plurality of workpieces, which are disposed on the spinning disk. The spinning disk comprises a rotating central hub with a plurality of platens. The spinning disk rotates about a central axis. The spinning disk is also translated linearly in a directional perpendicular to the central axis. The spot ion beam strikes the spinning disk at a distance from the central axis, referred to as the radius of impact. The rotation rate and the scan velocity may both vary inversely with the radius of impact.
    Type: Application
    Filed: March 14, 2022
    Publication date: September 14, 2023
    Inventors: Stanislav S. Todorov, Robert J. Mitchell, Joseph C. Olson, Frank Sinclair
  • Publication number: 20230016122
    Abstract: A method of operating a beamline ion implanter may include performing, in an ion implanter, a first implant procedure to implant a dopant of a first polarity into a given semiconductor substrate, and generating an estimated implant dose of the dopant of the first polarity based upon a set of filtered information, generated by the first implant procedure. The method may also include calculating an actual implant dose of the dopant of the first polarity using a predictive model based upon the estimated implant dose, and performing, in the ion implanter, an adjusted second implant procedure to implant a dopant of a second polarity into a select semiconductor substrate, based upon the actual implant dose.
    Type: Application
    Filed: December 23, 2021
    Publication date: January 19, 2023
    Applicant: Applied Materials, Inc.
    Inventors: Alexander K. Eidukonis, Hans-Joachim L. Gossmann, Dennis Rodier, Stanislav S. Todorov, Richard White, Wei Zhao, Wei Zou, Supakit Charnvanichborikarn
  • Publication number: 20220108893
    Abstract: Provided herein are approaches for forming an image sensor with increased well depth due to cryogenic ion channeling of ultra-high energy (UHE) ions. In some embodiments, a method may include providing a wafer of a semiconductor device, the semiconductor device including a photoelectric conversion region, and cooling the wafer to a temperature less than ?50° C. The method may further include performing an ion implant to the photoelectric conversion region to form a photodiode well after cooling the wafer.
    Type: Application
    Filed: October 7, 2020
    Publication date: April 7, 2022
    Applicant: Applied Materials, Inc.
    Inventors: Hans-Joachim L. Gossmann, Stanislav S. Todorov, Hiroyuki Ito
  • Patent number: 10658156
    Abstract: A system and method for generating a plurality of scan profiles based on a desired implant pattern and the uniformity of the spot beam is disclosed. The system scans the spot beam and records the number of ions as a function of position. This is referred to as the linear uniformity array. The desired implant pattern and the linear uniformity array are then combined to generate a composite pattern array. This array contemplates the non-uniformity of the scanned beam and allows the system to create scan profiles that compensate for this. The software may be executed on the controller disposed in the implantation system, or may be executed on a different computing device.
    Type: Grant
    Filed: February 1, 2019
    Date of Patent: May 19, 2020
    Assignee: Applied Materials, Inc.
    Inventors: Stanislav S. Todorov, Jeffrey Morse, John Sawyer
  • Patent number: 10081861
    Abstract: Methods for the selective processing of the outer portion of a workpiece are disclosed. The outer portion is processed by directing an ion beam toward the workpiece, where the ion beam extends beyond the outer edge of the workpiece at two locations. The workpiece is then rotated relative to the ion beam about the center so that all regions of the outer portion are exposed to the ion beam. The workpiece may be rotated an integral number of rotations. The ion beam may perform any process, such as ion implantation, etching or deposition. The outer portion may be an annular ring having an outer diameter equal to that of the workpiece and having a width of 1 to 30 millimeters. The rotation of the workpiece may be aligned with a notch on the outer edge of the workpiece.
    Type: Grant
    Filed: April 8, 2015
    Date of Patent: September 25, 2018
    Assignee: Varian Semiconductor Equipment Associates, Inc.
    Inventors: Morgan D. Evans, Daniel Distaso, Stanislav S. Todorov, Mark R. Amato, William Davis Lee, Jillian Reno
  • Patent number: 9738968
    Abstract: An apparatus includes a beam scanner applying, during a non-uniform scanning mode, a plurality of different waveforms generating a scan of an ion beam along a scan direction, wherein a given waveform comprises a plurality of scan segments, wherein a first scan segment comprises a first scan rate and a second scan segment comprises a second scan rate different from the first scan rate; a current detector intercepting the ion beam outside of a substrate region and recording a measured integrated current of the ion beam for a given waveform; and a scan adjustment component coupled to the beam scanner and comprising logic to determine: when a beam width of the ion beam along the scan direction exceeds a threshold; and a plurality of current ratios based on the measured integrated current of the ion beam for at least two different waveforms of the plurality of waveforms.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: August 22, 2017
    Assignee: Varian Semiconductor Equipment Associates, Inc.
    Inventors: George M. Gammel, Morgan D. Evans, Stanislav S. Todorov, Norman E. Hussey, Gregory R. Gibilaro
  • Publication number: 20160312357
    Abstract: An apparatus includes a beam scanner applying, during a non-uniform scanning mode, a plurality of different waveforms generating a scan of an ion beam along a scan direction, wherein a given waveform comprises a plurality of scan segments, wherein a first scan segment comprises a first scan rate and a second scan segment comprises a second scan rate different from the first scan rate; a current detector intercepting the ion beam outside of a substrate region and recording a measured integrated current of the ion beam for a given waveform; and a scan adjustment component coupled to the beam scanner and comprising logic to determine: when a beam width of the ion beam along the scan direction exceeds a threshold; and a plurality of current ratios based on the measured integrated current of the ion beam for at least two different waveforms of the plurality of waveforms.
    Type: Application
    Filed: April 18, 2016
    Publication date: October 27, 2016
    Inventors: George M. Gammel, Morgan D. Evans, Stanislav S. Todorov, Norman E. Hussey, Gregory R. Gibilaro
  • Publication number: 20160298229
    Abstract: Methods for the selective processing of the outer portion of a workpiece are disclosed. The outer portion is processed by directing an ion beam toward the workpiece, where the ion beam extends beyond the outer edge of the workpiece at two locations. The workpiece is then rotated relative to the ion beam about the center so that all regions of the outer portion are exposed to the ion beam. The workpiece may be rotated an integral number of rotations. The ion beam may perform any process, such as ion implantation, etching or deposition. The outer portion may be an annular ring having an outer diameter equal to that of the workpiece and having a width of 1 to 30 millimeters. The rotation of the workpiece may be aligned with a notch on the outer edge of the workpiece.
    Type: Application
    Filed: April 8, 2015
    Publication date: October 13, 2016
    Inventors: Morgan D. Evans, Daniel Distaso, Stanislav S. Todorov, Mark R. Amato, William Davis Lee, Jillian Reno
  • Patent number: 9299564
    Abstract: Various methods for implanting dopant ions into a three dimensional feature of a semiconductor wafer are disclosed. The implant temperature may be varied to insure that the three dimensional feature, after implant, has a crystalline inner core, which is surrounded by an amorphized surface layer. The crystalline core provides a template from which the crystalline structure for the rest of the feature can be regrown. In some embodiments, the implant energy and the implant temperature may each be modified to achieve the desired crystalline inner core with the surrounding amorphized surface layer.
    Type: Grant
    Filed: May 20, 2013
    Date of Patent: March 29, 2016
    Assignee: Varian Semiconductor Equipment Associates, Inc.
    Inventors: Andrew M. Waite, Stanislav S. Todorov
  • Patent number: 9006692
    Abstract: A system to control an ion beam in an ion implanter includes a detector to perform a plurality of beam current measurements of the ion beam along a first direction perpendicular to a direction of propagation of the ion beam. The system also includes an analysis component to determine a beam current profile based upon the plurality of beam current measurements, the beam current profile comprising a variation of beam current along the first direction; and an adjustment component to adjust a height of the ion beam along the first direction when the beam current profile indicates the beam height is below a threshold.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: April 14, 2015
    Assignee: Varian Semiconductor Equipment Associates, Inc.
    Inventors: Stanislav S. Todorov, George M. Gammel, Richard Allen Sprenkle, Norman E. Hussey, Frank Sinclair, Shengwu Chang, Joseph C. Olson, David Roger Timberlake, Kurt T. Decker-Lucke
  • Publication number: 20140326179
    Abstract: A system to control an ion beam in an ion implanter includes a detector to perform a plurality of beam current measurements of the ion beam along a first direction perpendicular to a direction of propagation of the ion beam. The system also includes an analysis component to determine a beam current profile based upon the plurality of beam current measurements, the beam current profile comprising a variation of beam current along the first direction; and an adjustment component to adjust a height of the ion beam along the first direction when the beam current profile indicates the beam height is below a threshold.
    Type: Application
    Filed: September 25, 2013
    Publication date: November 6, 2014
    Applicant: Varian Semiconductor Equipment Associates, Inc.
    Inventors: Stanislav S. Todorov, George M. Gammel, Richard Allen Sprenkle, Norman E. Hussey, Frank Sinclair, Shengwu Chang, Joseph C. Olson, David Roger Timberlake, Kurt T. Decker-Lucke
  • Patent number: 8853653
    Abstract: A system to control an ion beam in an ion implanter includes a detector system to detect a plurality of beam current measurements of the ion beam at a first frequency and an analysis component to determine a variation of the ion beam based upon the plurality of beam current measurements, the variation corresponding to a beam current variation of the ion beam at a second frequency different from the first frequency. The system also includes an adjustment component to adjust the ion beam in response to an output of the analysis component to reduce the variation, wherein the analysis component and the adjustment component are configured to dynamically reduce the variation of the ion beam below a threshold value while the ion beam is generated in the ion implanter.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: October 7, 2014
    Assignee: Varian Semiconductor Equipment Associates, Inc.
    Inventors: Stanislav S. Todorov, George M. Gammel, Richard Allen Sprenkle, Norman E. Hussey, Frank Sinclair, Shengwu Chang, Joseph C. Olson, David Roger Timberlake, Kurt T. Decker-Lucke
  • Publication number: 20140162435
    Abstract: Various methods for implanting dopant ions into a three dimensional feature of a semiconductor wafer are disclosed. The implant temperature may be varied to insure that the three dimensional feature, after implant, has a crystalline inner core, which is surrounded by an amorphized surface layer. The crystalline core provides a template from which the crystalline structure for the rest of the feature can be regrown. In some embodiments, the implant energy and the implant temperature may each be modified to achieve the desired crystalline inner core with the surrounding amorphized surface layer.
    Type: Application
    Filed: May 20, 2013
    Publication date: June 12, 2014
    Applicant: Varian Semiconductor Equipment Associates, Inc.
    Inventors: Andrew M. Waite, Stanislav S. Todorov
  • Patent number: 8722431
    Abstract: A method of forming a FinFET device. The method may include providing a substrate having a single crystalline region, heating the substrate to a substrate temperature effective for dynamically removing implant damage during ion implantation, implanting ions into the substrate while the substrate is maintained at the substrate temperature, and patterning the single crystalline region so as to form a single crystalline fin.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: May 13, 2014
    Inventors: Nilay Anil Pradhan, Stanislav S. Todorov, Kurt Decker-Lucke, Klaus Petry, Benjamin Colombeau, Baonian Guo
  • Publication number: 20130252349
    Abstract: A method of forming a FinFET device. The method may include providing a substrate having a single crystalline region, heating the substrate to a substrate temperature effective for dynamically removing implant damage during ion implantation, implanting ions into the substrate while the substrate is maintained at the substrate temperature, and patterning the single crystalline region so as to form a single crystalline fin.
    Type: Application
    Filed: March 22, 2012
    Publication date: September 26, 2013
    Applicant: Varian Semiconductor Equipment Associates, Inc.
    Inventors: Nilay Anil Pradhan, Stanislav S. Todorov, Kurt Decker-Lucke, Klaus Petry, Benjamin Colombeau, Baonian Guo
  • Patent number: 7413596
    Abstract: The present invention provides methods and apparatus for the production of liquids and vapors that are free of, or substantially free of, dissolved or trapped gases. In one embodiment, a liquid is placed in a sealed vessel and subjected to a temperature below the freezing point of the liquid for sufficient time to substantially, if not completely, turn the liquid into a solid. Concurrent with or subsequent to the cooling of the liquid, the interior of the vessel is subjected to a vacuum so as to evacuate all or substantially all of the gaseous atmosphere. Thereafter, the vessel is heated to a temperature above the melting point of the liquid, allowing the frozen material to return to its liquid form or sublimate to form a vapor.
    Type: Grant
    Filed: November 5, 2004
    Date of Patent: August 19, 2008
    Assignee: Varian Semiconductor Equipment Associates, Inc.
    Inventors: Wilhelm P. Platow, John B. Cracchiolo, Stanislav S. Todorov, Jaime M. Reyes
  • Patent number: 7397049
    Abstract: A system, method and program product for determining parallelism of an ion beam using a refraction method, are disclosed. One embodiment includes determining a first test position of the ion beam while not exposing the ion beam to an acceleration/deceleration electrical field, determining a second test position of the ion beam while exposing the ion beam to an acceleration/deceleration electrical field, and determining the parallelism of the ion beam based on the first test position and the second test position. The acceleration/deceleration electrical field acts to refract the ion beam between the two positions when the beam is not parallel, hence magnifying any non-parallelism. The amount of refraction, or lateral shift, can be used to determine the amount of non-parallelism of the ion beam. An ion implanter system and adjustments of the ion implanter system based on the parallelism determination are also disclosed.
    Type: Grant
    Filed: March 22, 2006
    Date of Patent: July 8, 2008
    Assignee: Varian Semiconductor Equipment Associates, Inc.
    Inventors: Raymond Callahan, David Olson, Wilhelm P. Platow, Stanislav S. Todorov
  • Publication number: 20070221871
    Abstract: A system, method and program product for determining parallelism of an ion beam using a refraction method, are disclosed. One embodiment includes determining a first test position of the ion beam while not exposing the ion beam to an acceleration/deceleration electrical field, determining a second test position of the ion beam while exposing the ion beam to an acceleration/deceleration electrical field, and determining the parallelism of the ion beam based on the first test position and the second test position. The acceleration/deceleration electrical field acts to refract the ion beam between the two positions when the beam is not parallel, hence magnifying any non-parallelism. The amount of refraction, or lateral shift, can be used to determine the amount of non-parallelism of the ion beam. An ion implanter system and adjustments of the ion implanter system based on the parallelism determination are also disclosed.
    Type: Application
    Filed: March 22, 2006
    Publication date: September 27, 2007
    Applicant: Varian Semiconductor Equipment Associates, Inc.
    Inventors: Raymond Callahan, David Olson, Wilhelm P. Platow, Stanislav S. Todorov