Patents by Inventor David DeKraker

David DeKraker 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: 20180190517
    Abstract: An apparatus for cleaning a microelectronic workpiece and a method of operating is described. The apparatus includes a workpiece holding mechanism to support and hold a workpiece, a chemical supply mechanism configured to supply multiple chemical fluids including gas-phase components and liquid-phase components, a dispense mechanism arranged to dispense one or more chemical compositions onto the workpiece, and a valve mechanism fluidically disposed between the chemical supply mechanism and the dispense mechanism. A control circuit is coupled to the valve mechanism, and configured to (i) flow at least one gas-phase chemical component to a first nozzle array and at least one liquid-phase chemical component to a second nozzle array, and (ii) flow at least one gas-phase chemical component from the chemical supply mechanism to the second nozzle array and at least one liquid-phase chemical component from the chemical supply mechanism to the first nozzle array.
    Type: Application
    Filed: December 20, 2017
    Publication date: July 5, 2018
    Inventors: David DeKraker, Jeffrey M. Lauerhaas, Jeffery W. Butterbaugh, Alan D. Rose
  • Patent number: 9887107
    Abstract: Rinsing methodologies and components to accomplish rinsing of tool surfaces in tools that are used to process one or more microelectronic workpieces. The invention can be used to rinse structures that overlie a workpiece being treated in such a manner to function in part as a lid over the process chamber while also defining a tapering flow channel over the workpiece. Rather than spray rinsing liquid onto the surface in a manner that generates undue splashing, droplet, or mist generation, a swirling flow of rinse liquid is generated on a surface of at least one fluid passage upstream from the surface to be rinsed. The swirling flow then provides smooth, uniform wetting and sheeting action to accomplish rinsing with a significantly reduced risk of generating particle contamination.
    Type: Grant
    Filed: February 15, 2016
    Date of Patent: February 6, 2018
    Assignee: TEL FSI, INC.
    Inventors: Mark A. Stiyer, David Dekraker
  • Publication number: 20180025904
    Abstract: Disclosed herein are systems and methods for treating the surface of a microelectronic substrate, and in particular, relate to an apparatus and method for scanning the microelectronic substrate through a cryogenic fluid mixture used to treat an exposed surface of the microelectronic substrate. The fluid mixture may be expanded through a nozzle to form an aerosol spray or gas cluster jet (GCJ) spray may impinge the microelectronic substrate and remove particles from the microelectronic substrate's surface. In one embodiment, the process conditions may be varied between subsequent treatments of a single substrate to target different types of particles with each treatment.
    Type: Application
    Filed: September 29, 2017
    Publication date: January 25, 2018
    Inventor: David DeKraker
  • Patent number: 9831107
    Abstract: A method and processing system are provided for independent temperature and hydration control for an etching solution used for treating a wafer in process chamber. The method includes circulating the etching solution in a circulation loop, maintaining the etching solution at a hydration setpoint by adding or removing water from the etching solution, maintaining the etching solution at a temperature setpoint that is below the boiling point of the etching solution in the circulation loop, and dispensing the etching solution into the process chamber for treating the wafer. In one embodiment, the dispensing includes dispensing the etching solution into a processing region proximate the wafer in the process chamber, introducing steam into an exterior region that is removed from the wafer in the process chamber, and treating the wafer with the etching solution and the steam.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: November 28, 2017
    Assignee: TEL FSI, INC.
    Inventors: Kevin L Siefering, William P Inhofer, David DeKraker
  • Publication number: 20160284535
    Abstract: A method for stripping material from a microelectronic workpiece is described. The method includes receiving a workpiece having a surface exposing a layer composed of silicon and organic material, and placing the workpiece in a wet clean chamber. In the wet clean chamber, the layer composed of silicon and organic material is removed from the workpiece by exposing the surface of the workpiece to a first stripping agent containing a sulfuric acid composition, and then optionally exposing the surface of the workpiece to a second stripping agent containing dilute hydrofluoric acid (dHF).
    Type: Application
    Filed: March 27, 2015
    Publication date: September 29, 2016
    Inventors: Jeffrey M. Lauerhaas, Anthony S. Ratkovich, Erik R. Berg, Jeffery W. Butterbaugh, Robert Thomas John Matz, David DeKraker
  • Patent number: 9412639
    Abstract: Embodiments of the invention are directed towards improving on-wafer process performance and processing at increased processing fluid/wafer temperature while maintaining good process performance. A method for processing a wafer in a process chamber is described where the process chamber includes a wafer holder having first and second sets of edge grippers for independently securing the wafer at the wafer edge during processing, treating the wafer with a first processing fluid while securing the wafer with the first set of edge grippers, but not with the second set of edge grippers, treating the wafer with a second processing fluid while securing the wafer with the first set of edge grippers, but not with the second set of edge grippers, and treating the wafer with a third processing fluid while securing the wafer with the second set of edge grippers, but not with the first set of edge grippers.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: August 9, 2016
    Assignee: TEL FSI, INC.
    Inventors: Kevin L. Siefering, David DeKraker
  • Publication number: 20160163568
    Abstract: Rinsing methodologies and components to accomplish rinsing of tool surfaces in tools that are used to process one or more microelectronic workpieces. The invention can be used to rinse structures that overlie a workpiece being treated in such a manner to function in part as a lid over the process chamber while also defining a tapering flow channel over the workpiece. Rather than spray rinsing liquid onto the surface in a manner that generates undue splashing, droplet, or mist generation, a swirling flow of rinse liquid is generated on a surface of at least one fluid passage upstream from the surface to be rinsed. The swirling flow then provides smooth, uniform wetting and sheeting action to accomplish rinsing with a significantly reduced risk of generating particle contamination.
    Type: Application
    Filed: February 15, 2016
    Publication date: June 9, 2016
    Applicant: TEL FSI, Inc.
    Inventors: Mark A. Stiyer, David Dekraker
  • Patent number: 9263303
    Abstract: Rinsing methodologies and components to accomplish rinsing of tool surfaces in tools that are used to process one or more microelectronic workpieces. The invention can be used to rinse structures that overlie a workpiece being treated in such a manner to function in part as a lid over the process chamber while also defining a tapering flow channel over the workpiece. Rather than spray rinsing liquid onto the surface in a manner that generates undue splashing, droplet, or mist generation, a swirling flow of rinse liquid is generated on a surface of at least one fluid passage upstream from the surface to be rinsed. The swirling flow then provides smooth, uniform wetting and sheeting action to accomplish rinsing with a significantly reduced risk of generating particle contamination.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: February 16, 2016
    Assignee: TEL FSI, INC.
    Inventors: Mark A. Stiyer, David Dekraker
  • Publication number: 20150162207
    Abstract: Embodiments of the invention are directed towards improving on-wafer process performance and processing at increased processing fluid/wafer temperature while maintaining good process performance. A method for processing a wafer in a process chamber is described where the process chamber includes a wafer holder having first and second sets of edge grippers for independently securing the wafer at the wafer edge during processing, treating the wafer with a first processing fluid while securing the wafer with the first set of edge grippers, but not with the second set of edge grippers, treating the wafer with a second processing fluid while securing the wafer with the first set of edge grippers, but not with the second set of edge grippers, and treating the wafer with a third processing fluid while securing the wafer with the second set of edge grippers, but not with the first set of edge grippers.
    Type: Application
    Filed: December 5, 2014
    Publication date: June 11, 2015
    Inventors: Kevin L. Siefering, David DeKraker
  • Patent number: 8920577
    Abstract: A method of treating a substrate comprises, in one aspect, placing a substrate having material on a surface thereof in a treatment chamber; directing a stream of a liquid treatment composition to impinge the substrate surface; and directing a stream of water vapor to impinge the substrate surface and/or to impinge the liquid treatment composition. A preferred aspect of this invention is the removal of materials, and preferably photoresist, from a substrate, wherein the treatment composition is a liquid sulfuric acid composition comprising sulfuric acid and/or its desiccating species and precursors.
    Type: Grant
    Filed: September 1, 2010
    Date of Patent: December 30, 2014
    Assignee: Tel FSI, Inc.
    Inventors: David DeKraker, Jeffery W. Butterbaugh, Richard E. Williamson
  • Publication number: 20140277682
    Abstract: A method and processing system are provided for independent temperature and hydration control for an etching solution used for treating a wafer in process chamber. The method includes circulating the etching solution in a circulation loop, maintaining the etching solution at a hydration setpoint by adding or removing water from the etching solution, maintaining the etching solution at a temperature setpoint that is below the boiling point of the etching solution in the circulation loop, and dispensing the etching solution into the process chamber for treating the wafer. In one embodiment, the dispensing includes dispensing the etching solution into a processing region proximate the wafer in the process chamber, introducing steam into an exterior region that is removed from the wafer in the process chamber, and treating the wafer with the etching solution and the steam.
    Type: Application
    Filed: March 13, 2014
    Publication date: September 18, 2014
    Applicant: TEL FSI, Inc.
    Inventors: Kevin L. Siefering, William P. Inhofer, David DeKraker
  • Patent number: 8387635
    Abstract: The present invention provides a tool for treating microelectronic workpieces with one or more treatment materials, including liquids, gases, fluidized solids, dispersions, combinations of these, and the like.
    Type: Grant
    Filed: June 20, 2007
    Date of Patent: March 5, 2013
    Assignee: Tel FSI, Inc.
    Inventors: Jimmy D. Collins, David DeKraker, Tracy A. Gast, Alan D. Rose
  • Patent number: 8142571
    Abstract: A process is provided for treating a semiconductor wafer at a target wafer temperature. This process includes the following steps: a) determining the target wafer temperature of the semiconductor wafer during a given wafer treatment process step; b) providing a treatment chamber having at least one semiconductor wafer disposed therein; c) dispensing water vapor into the treatment chamber in an amount to provide the chamber with an atmospheric environment having a dew point sufficiently close to the target wafer temperature to provide a temperature regulating effect; and d) initiating the given wafer treatment process step when the atmospheric environment of the treatment chamber is at the dew point of step c).
    Type: Grant
    Filed: May 6, 2009
    Date of Patent: March 27, 2012
    Assignee: FSI International, Inc.
    Inventors: Kurt K. Christenson, David DeKraker
  • Publication number: 20110303246
    Abstract: Rinsing methodologies and components to accomplish rinsing of tool surfaces in tools that are used to process one or more microelectronic workpieces. The invention can be used to rinse structures that overlie a workpiece being treated in such a manner to function in part as a lid over the process chamber while also defining a tapering flow channel over the workpiece. Rather than spray rinsing liquid onto the surface in a manner that generates undue splashing, droplet, or mist generation, a swirling flow of rinse liquid is generated on a surface of at least one fluid passage upstream from the surface to be rinsed. The swirling flow then provides smooth, uniform wetting and sheeting action to accomplish rinsing with a significantly reduced risk of generating particle contamination.
    Type: Application
    Filed: June 10, 2011
    Publication date: December 15, 2011
    Inventors: Mark A. Stiyer, David DeKraker
  • Publication number: 20110259376
    Abstract: The present invention provides methods and apparatuses for controlling the transition between first and second treatment fluids during processing of microelectronic devices using spray processor tools
    Type: Application
    Filed: April 11, 2011
    Publication date: October 27, 2011
    Inventors: Thomas J. Wagener, Jeffery W. Butterbaugh, David DeKraker
  • Patent number: 7913706
    Abstract: Tool for treating microelectronic workpieces with one or more treatment materials, including liquids, gases, fluidized solids, dispersions, combinations of these, and the like. The invention provides an approach for rapid, efficient rinsing of wetted surface(s), and is particularly advantageous when used to rinse the lower surface of moveable barrier structures such as a barrier plate that overlies a workpiece being treated in such a manner to define a tapering flow channel over the workpiece. Rather than spray rinsing liquid onto the surface in a manner that generates undue splashing, droplet, or mist generation, the liquid is flowingly dispensed, preferably under laminar flow conditions, onto a surface that is in fluid communication with the surface to be rinsed. A smooth, uniform wetting and sheeting action results to accomplish rinsing with a significantly reduced risk of generating particle contamination.
    Type: Grant
    Filed: July 29, 2008
    Date of Patent: March 29, 2011
    Assignee: FSI International, Inc.
    Inventors: David DeKraker, Jimmy D. Collins, Tracy A. Gast, Alan D. Rose, Richard E. Williamson
  • Publication number: 20100326477
    Abstract: A method of treating a substrate comprises, in one aspect, placing a substrate having material on a surface thereof in a treatment chamber; directing a stream of a liquid treatment composition to impinge the substrate surface; and directing a stream of water vapor to impinge the substrate surface and/or to impinge the liquid treatment composition. A preferred aspect of this invention is the removal of materials, and preferably photoresist, from a substrate, wherein the treatment composition is a liquid sulfuric acid composition comprising sulfuric acid and/or its desiccating species and precursors.
    Type: Application
    Filed: September 1, 2010
    Publication date: December 30, 2010
    Inventors: David DeKraker, Jeffery W. Butterbaugh, Richard E. Williamson
  • Patent number: 7819984
    Abstract: A method of treating a substrate comprises, in one aspect, placing a substrate having material on a surface thereof in a treatment chamber; directing a stream of a liquid treatment composition to impinge the substrate surface; and directing a stream of water vapor to impinge the substrate surface and/or to impinge the liquid treatment composition. A preferred aspect of this invention is the removal of materials, and preferably photoresist, from a substrate, wherein the treatment composition is a liquid sulfuric acid composition comprising sulfuric acid and/or its desiccating species and precursors.
    Type: Grant
    Filed: May 15, 2008
    Date of Patent: October 26, 2010
    Assignee: FSI International, Inc.
    Inventors: David DeKraker, Jeffery W. Butterbaugh, Richard E. Williamson
  • Publication number: 20090286334
    Abstract: A process is provided for treating a semiconductor wafer at a target wafer temperature. This process includes the following steps: a) determining the target wafer temperature of the semiconductor wafer during a given wafer treatment process step; b) providing a treatment chamber having at least one semiconductor wafer disposed therein; c) dispensing water vapor into the treatment chamber in an amount to provide the chamber with an atmospheric environment having a dew point sufficiently close to the target wafer temperature to provide a temperature regulating effect; and d) initiating the given wafer treatment process step when the atmospheric environment of the treatment chamber is at the dew point of step c).
    Type: Application
    Filed: May 6, 2009
    Publication date: November 19, 2009
    Applicant: FSI INTERNATIONAL, INC.
    Inventors: Kurt K. Christenson, David DeKraker
  • Publication number: 20090038647
    Abstract: Tool for treating microelectronic workpieces with one or more treatment materials, including liquids, gases, fluidized solids, dispersions, combinations of these, and the like. The invention provides an approach for rapid, efficient rinsing of wetted surface(s), and is particularly advantageous when used to rinse the lower surface of moveable barrier structures such as a barrier plate that overlies a workpiece being treated in such a manner to define a tapering flow channel over the workpiece. Rather than spray rinsing liquid onto the surface in a manner that generates undue splashing, droplet, or mist generation, the liquid is flowingly dispensed, preferably under laminar flow conditions, onto a surface that is in fluid communication with the surface to be rinsed. A smooth, uniform wetting and sheeting action results to accomplish rinsing with a significantly reduced risk of generating particle contamination.
    Type: Application
    Filed: July 29, 2008
    Publication date: February 12, 2009
    Inventors: David DeKraker, Jimmy D. Collins, Tracy A. Gast, Alan D. Rose, Richard E. Williamson