Patents by Inventor Harry Christov

Harry Christov 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: 11830726
    Abstract: Various embodiments comprise apparatuses and related methods for cleaning a substrate. In one embodiment, an apparatus includes a substrate holder to hold and rotate the substrate at various speeds. An optional inner shield and an optional outer shield, when in a closed position, surround the substrate holder during operation of the apparatus. Each of the inner shield and the outer shield can operate independently in at least one of rotational speed and direction from the other shield. At least one of a front-side laser and a back-side laser are arranged to clean one or both sides of the substrate and edges of the substrate substantially concurrently or independently by impinging a light onto at least one surface of the substrate. A gas flow, combined with a high rotational-speed of the shields and substrate, assists in removing effluents from the substrate. Additional apparatuses and methods of forming the apparatuses are disclosed.
    Type: Grant
    Filed: June 17, 2021
    Date of Patent: November 28, 2023
    Assignee: Planar Semiconductor Corporation Pte. Ltd.
    Inventors: Rubinder S. Randhawa, Harry Christov
  • Publication number: 20210313173
    Abstract: Various embodiments comprise apparatuses and related methods for cleaning a substrate. In one embodiment, an apparatus includes a substrate holder to hold and rotate the substrate at various speeds. An optional inner shield and an optional outer shield, when in a closed position, surround the substrate holder during operation of the apparatus. Each of the inner shield and the outer shield can operate independently in at least one of rotational speed and direction from the other shield. At least one of a front-side laser and a back-side laser are arranged to clean one or both sides of the substrate and edges of the substrate substantially concurrently or independently by impinging a light onto at least one surface of the substrate. A gas flow, combined with a high rotational-speed of the shields and substrate, assists in removing effluents from the substrate. Additional apparatuses and methods of forming the apparatuses are disclosed.
    Type: Application
    Filed: June 17, 2021
    Publication date: October 7, 2021
    Inventors: Rubinder S. Randhawa, Harry Christov
  • Patent number: 11069521
    Abstract: Various embodiments comprise apparatuses and related methods for cleaning a substrate. In one embodiment, an apparatus includes a substrate holder to hold and rotate the substrate at various speeds. An optional inner shield and an optional outer shield, when in a closed position, surround the substrate holder during operation of the apparatus. Each of the inner shield and the outer shield can operate independently in at least one of rotational speed and direction from the other shield. At least one of a front-side laser and a back-side laser are arranged to clean one or both sides of the substrate and edges of the substrate substantially concurrently or independently by impinging a light onto at least one surface of the substrate. A gas flow, combined with a high rotational-speed of the shields and substrate, assists in removing effluents from the substrate. Additional apparatuses and methods of forming the apparatuses are disclosed.
    Type: Grant
    Filed: February 5, 2018
    Date of Patent: July 20, 2021
    Assignee: Planar Semiconductor, Inc.
    Inventors: Rubinder S. Randhawa, Harry Christov
  • Patent number: 10985039
    Abstract: Various embodiments comprise apparatuses for cleaning and drying a substrate and methods of operating the apparatuses. In one embodiment, an exemplary apparatus includes a vertical substrate holder to hold and rotate the substrate at various speeds. An inner shield and an outer shield, when in a closed position, surround the vertical substrate holder during operation of the apparatus. Each of the inner shield and the outer shield can operate independently in at least one of rotational speed and direction from the other shield. A front-side spray jet and a back-side spray jet are arranged to spray at least one fluid onto both sides of the substrate and edges of the substrate substantially concurrently. A gas flow, combined with a high rotational-speed of the shields and substrate, assist in drying the substrate. Additional apparatuses and methods of forming the apparatuses are disclosed.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: April 20, 2021
    Assignee: Planar Semiconductor, Inc.
    Inventors: Rubinder S. Randhawa, Harry Christov
  • Patent number: 10892172
    Abstract: Various embodiments comprise apparatuses and related method for cleaning and drying a substrate. In one embodiment, an apparatus includes a vertical substrate holder to hold and rotate the substrate at various speeds. An inner shield and outer shield, when in a closed position, surround the vertical substrate holder during operation of the apparatus. Each of the shields can operate independently in at least one of rotational speed and direction from the other shield. A front-side and back-side spray jet are arranged to spray at least one fluid onto both sides of the substrate and edges of the substrate substantially concurrently. A gas flow, combined with a high rotational-speed of the shields and substrate, assists in drying the substrate. At least one turbine disk is coupled in proximity to at least one of the shields to remove excess amounts of fluid. Additional apparatuses and methods of forming the apparatuses are disclosed.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: January 12, 2021
    Assignee: Planar Semiconductor, Inc.
    Inventors: Rubinder S. Randhawa, Harry Christov
  • Publication number: 20200219722
    Abstract: Various embodiments comprise apparatuses and related methods for cleaning a substrate. In one embodiment, an apparatus includes a substrate holder to hold and rotate the substrate at various speeds. An optional inner shield and an optional outer shield, when in a closed position, surround the substrate holder during operation of the apparatus. Each of the inner shield and the outer shield can operate independently in at least one of rotational speed and direction from the other shield. At least one of a front-side laser and a back-side laser are arranged to clean one or both sides of the substrate and edges of the substrate substantially concurrently or independently by impinging a light onto at least one surface of the substrate. A gas flow, combined with a high rotational-speed of the shields and substrate, assists in removing effluents from the substrate. Additional apparatuses and methods of forming the apparatuses are disclosed.
    Type: Application
    Filed: February 5, 2018
    Publication date: July 9, 2020
    Inventors: Rubinder S. Randhawa, Harry Christov
  • Publication number: 20190378729
    Abstract: Various embodiments comprise apparatuses and related method for cleaning and drying a substrate. In one embodiment, an apparatus includes a vertical substrate holder to hold and rotate the substrate at various speeds. An inner shield and outer shield, when in a closed position, surround the vertical substrate holder during operation of the apparatus. Each of the shields can operate independently in at least one of rotational speed and direction from the other shield. A front-side and back-side spray jet are arranged to spray at least one fluid onto both sides of the substrate and edges of the substrate substantially concurrently. A gas flow, combined with a high rotational-speed of the shields and substrate, assists in drying the substrate. At least one turbine disk is coupled in proximity to at least one of the shields to remove excess amounts of fluid. Additional apparatuses and methods of forming the apparatuses are disclosed.
    Type: Application
    Filed: February 6, 2018
    Publication date: December 12, 2019
    Applicant: Planar Semiconductor, Inc.
    Inventors: Rubinder S. RANDHAWA, Harry CHRISTOV
  • Publication number: 20190371629
    Abstract: Various embodiments comprise apparatuses for cleaning and drying a substrate and methods of operating the apparatuses. In one embodiment, an exemplary apparatus includes a vertical substrate holder to hold and rotate the substrate at various speeds. An inner shield and an outer shield, when in a closed position, surround the vertical substrate holder during operation of the apparatus. Each of the inner shield and the outer shield can operate independently in at least one of rotational speed and direction from the other shield. A front-side spray jet and a back-side spray jet are arranged to spray at least one fluid onto both sides of the substrate and edges of the substrate substantially concurrently. A gas flow, combined with a high rotational-speed of the shields and substrate, assist in drying the substrate. Additional apparatuses and methods of forming the apparatuses are disclosed.
    Type: Application
    Filed: January 30, 2018
    Publication date: December 5, 2019
    Inventors: Rubinder S. Randhawa, Harry Christov
  • Patent number: 9418831
    Abstract: Cleaning and drying of semiconductor wafers is carried out in a single-chamber type cleaning/drying apparatus for flat objects such as semiconductor wafer, where cleaning is carried out by impinging both sides of the wafer which rotates at a relatively low speed with jets of a washing liquid and where subsequent drying is carried out in the same chamber by increasing the rotation speed of the wafer and supplying an isopropyl-alcohol (IPA) mist onto the wafer from the top of the chamber. After the IPA forms a solution with the residue of water on the wafer, the drying process is accelerated by supplying gaseous nitrogen through nozzles arranged on both side of the coaxial with the wafer center. As a result, the IPA-water solution quickly evaporates without leaving traces of water drops on the dried surface.
    Type: Grant
    Filed: July 30, 2007
    Date of Patent: August 16, 2016
    Assignee: Planar Semiconductor, Inc.
    Inventors: Rubinder Randhawa, Basha Sajjad, Shmuel Erez, Harry Christov
  • Patent number: 9275849
    Abstract: A single-chamber type cleaning-drying apparatus for flat objects, such as semiconductor wafers, wherein cleaning is carried out by impinging both sides of the wafer, which rotates at a relatively low speed, with jets of a washing liquid and wherein subsequent drying is carried out in the same chamber by increasing the rotation speed of the wafer and supplying isopropyl-alcohol (IPA) mist onto the wafer from the top of the chamber. After the IPA forms a solution with the residue of water on the wafer, the drying process is accelerated by supplying gaseous nitrogen through nozzles arranged on both sides of the wafer he coaxially with the wafer center. As a result, the IPA-water solution quickly evaporates without leaving traces of water drops on the dried surface.
    Type: Grant
    Filed: July 30, 2007
    Date of Patent: March 1, 2016
    Assignee: Planar Semiconductor, Inc.
    Inventors: Rubinder Randhawa, Basha Sajjad, Shmuel Erez, Harry Christov
  • Patent number: 9202725
    Abstract: A substrate holding and rotary driving mechanism, e.g., for a cleaning chamber with vertical orientation of the wafer, that is comprised of a three-armed spider which is rotatingly installed on the outer side of the cleaning chamber and rotatingly supports on the outer ends of its arms outer shafts with eccentrically arranged inner shafts. The inner shafts pass through the outer shafts into the cleaning chamber where they support contact rollers, while the opposite ends of the inner shafts support gears driven into rotation by a synchronous belt. The contact rollers can be moved apart for insertion or removal of wafers from and into the chamber. This is achieved by turning the spider with eccentric inner shafts in one or another direction.
    Type: Grant
    Filed: July 24, 2006
    Date of Patent: December 1, 2015
    Assignee: Planar Semiconductor, Inc.
    Inventors: Rubinder S. Randhawa, Shmuel Erez, Harry Christov, Basha Sajjad
  • Publication number: 20090032070
    Abstract: A single-chamber type cleaning-drying apparatus for flat objects, such as semiconductor wafers, wherein cleaning is carried out by impinging both sides of the wafer, which rotates at a relatively low speed, with jets of a washing liquid and wherein subsequent drying is carried out in the same chamber by increasing the rotation speed of the wafer and supplying isopropyl-alcohol (IPA) mist onto the wafer from the top of the chamber. After the IPA forms a solution with the residue of water on the wafer, the drying process is accelerated by supplying gaseous nitrogen through nozzles arranged on both sides of the wafer he coaxially with the wafer center. As a result, the IPA-water solution quickly evaporates without leaving traces of water drops on the dried surface.
    Type: Application
    Filed: July 30, 2007
    Publication date: February 5, 2009
    Inventors: Rubinder Randhawa, Basha Sajjad, Shmuel Erez, Harry Christov
  • Publication number: 20090032062
    Abstract: Cleaning and drying of semiconductor wafers is carried out in a single-chamber type cleaning/drying apparatus for flat objects such as semiconductor wafer, where cleaning is carried out by impinging both sides of the wafer which rotates at a relatively low speed with jets of a washing liquid and where subsequent drying is carried out in the same chamber by increasing the rotation speed of the wafer and supplying an isopropyl-alcohol (IPA) mist onto the wafer from the top of the chamber. After the IPA forms a solution with the residue of water on the wafer, the drying process is accelerated by supplying gaseous nitrogen through nozzles arranged on both side of the coaxial with the wafer center. As a result, the IPA-water solution quickly evaporates without leaving traces of water drops on the dried surface.
    Type: Application
    Filed: July 30, 2007
    Publication date: February 5, 2009
    Inventors: Rubinder Randhawa, Basha Sajjad, Shmuel Erez, Harry Christov
  • Publication number: 20080017225
    Abstract: A substrate holding and rotary driving mechanism, e.g., for a cleaning chamber with vertical orientation of the wafer, that is comprised of a three-armed spider which is rotatingly installed on the outer side of the cleaning chamber and rotatingly supports on the outer ends of its arms outer shafts with eccentrically arranged inner shafts. The inner shafts pass through the outer shafts into the cleaning chamber where they support contact rollers, while the opposite ends of the inner shafts support gears driven into rotation by a synchronous belt. The contact rollers can be moved apart for insertion or removal of wafers from and into the chamber. This is achieved by turning the spider with eccentric inner shafts in one or another direction.
    Type: Application
    Filed: July 24, 2006
    Publication date: January 24, 2008
    Inventors: Rubinder S. Randhawa, Shmuel Erez, Harry Christov, Basha Sajjad