Patents by Inventor Gunnar Barnhart

Gunnar Barnhart 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: 20060205324
    Abstract: Systems and methods for activating end effectors used to condition microfeature workpiece polishing pads are disclosed. A system in accordance with one embodiment of the invention includes a rotatable end effector having a conditioning surface configured to condition a microfeature workpiece polishing medium, and a driver coupled to the end effector to rotate the end effector. The driver does not include a flexible, continuous belt coupled to the end effector. For example, the driver can include a motor-driven worm meshed with a worm gear. The system can further include a forcing element coupled to the end effector to apply a force to the end effector that is at least approximately normal to a conditioning surface of the end effector. The forcing element can include a first generally rigid member and a second generally rigid member coupled to the end effector and movable relative to the first generally rigid member to apply the force.
    Type: Application
    Filed: May 15, 2006
    Publication date: September 14, 2006
    Applicant: Micron Technology, Inc.
    Inventors: Brett Mayes, Gunnar Barnhart, Michael Meadows, Charles Dringle
  • Patent number: 7077722
    Abstract: Systems and methods for activating end effectors used to condition microfeature workpiece polishing pads are disclosed. A system in accordance with one embodiment of the invention includes a rotatable end effector having a conditioning surface configured to condition a microfeature workpiece polishing medium, and a driver coupled to the end effector to rotate the end effector. The driver does not include a flexible, continuous belt coupled to the end effector. For example, the driver can include a motor-driven worm meshed with a worm gear. The system can further include a forcing element coupled to the end effector to apply a force to the end effector that is at least approximately normal to a conditioning surface of the end effector. The forcing element can include a first generally rigid member and a second generally rigid member coupled to the end effector and movable relative to the first generally rigid member to apply the force.
    Type: Grant
    Filed: August 2, 2004
    Date of Patent: July 18, 2006
    Assignee: Micron Technology, Inc.
    Inventors: Brett A. Mayes, Gunnar A. Barnhart, Michael E. Meadows, Charles K. Dringle
  • Publication number: 20060025054
    Abstract: Systems and methods for activating end effectors used to condition microfeature workpiece polishing pads are disclosed. A system in accordance with one embodiment of the invention includes a rotatable end effector having a conditioning surface configured to condition a microfeature workpiece polishing medium, and a driver coupled to the end effector to rotate the end effector. The driver does not include a flexible, continuous belt coupled to the end effector. For example, the driver can include a motor-driven worm meshed with a worm gear. The system can further include a forcing element coupled to the end effector to apply a force to the end effector that is at least approximately normal to a conditioning surface of the end effector. The forcing element can include a first generally rigid member and a second generally rigid member coupled to the end effector and movable relative to the first generally rigid member to apply the force.
    Type: Application
    Filed: August 2, 2004
    Publication date: February 2, 2006
    Inventors: Brett Mayes, Gunnar Barnhart, Michael Meadows, Charles Dringle
  • Patent number: 6632743
    Abstract: Washing a microelectronic substrate with an ozonated solution following planarization and proceeding removal of a native oxide layer through acid etching.
    Type: Grant
    Filed: August 7, 2000
    Date of Patent: October 14, 2003
    Assignee: Micron Technology, Inc.
    Inventors: Eric K. Grieger, Tim J. Kennedy, Robert H. Whitney, Gunnar A. Barnhart
  • Patent number: 6568999
    Abstract: A method and apparatus for cleaning a surface of a microelectronic substrate. In one embodiment, the apparatus can include a support member having a manifold in fluid communication with a source of liquid and in fluid communication with at least one exit aperture. A porous brush member can be coupled to the support member such that a contact portion of the brush is positioned against the exit aperture to receive liquid directly from the exit aperture. The liquid can flow from the exit aperture through the contact member and to the surface of the microelectronic substrate to keep the contact portion moist. The contact portion can be moistened as it cleans the microelectronic substrate or between cleaning cycles. The liquid can also be supplied to the contact portion at a rate sufficient to remove particulates and other contaminants from a porous outer surface of the contact portion.
    Type: Grant
    Filed: October 9, 2001
    Date of Patent: May 27, 2003
    Assignee: Micron Technology, Inc.
    Inventors: Gunnar A. Barnhart, Eric K. Grieger, Greg S. Green
  • Patent number: 6406358
    Abstract: A method and apparatus for cleaning a surface of a microelectronic substrate. In one embodiment, the apparatus can include a support member having a manifold in fluid communication with a source of liquid and in fluid communication with at least one exit aperture. A porous brush member can be coupled to the support member such that a contact portion of the brush is positioned against the exit aperture to receive liquid directly from the exit aperture. The liquid can flow from the exit aperture through the contact member and to the surface of the microelectronic substrate to keep the contact portion moist. The contact portion can be moistened as it cleans the microelectronic substrate or between cleaning cycles. The liquid can also be supplied to the contact portion at a rate sufficient to remove particulates and other contaminants from a porous outer surface of the contact portion.
    Type: Grant
    Filed: August 5, 1999
    Date of Patent: June 18, 2002
    Assignee: Micron Technology, Inc.
    Inventors: Gunnar A. Barnhart, Eric K. Grieger, Greg S. Green
  • Publication number: 20020028640
    Abstract: A method and apparatus for cleaning a surface of a microelectronic substrate. In one embodiment, the apparatus can include a support member having a manifold in fluid communication with a source of liquid and in fluid communication with at least one exit aperture. A porous brush member can be coupled to the support member such that a contact portion of the brush is positioned against the exit aperture to receive liquid directly from the exit aperture. The liquid can flow from the exit aperture through the contact member and to the surface of the microelectronic substrate to keep the contact portion moist. The contact portion can be moistened as it cleans the microelectronic substrate or between cleaning cycles. The liquid can also be supplied to the contact portion at a rate sufficient to remove particulates and other contaminants from a porous outer surface of the contact portion.
    Type: Application
    Filed: October 9, 2001
    Publication date: March 7, 2002
    Inventors: Gunnar A. Barnhart, Eric K. Grieger, Greg S. Green
  • Patent number: 6100198
    Abstract: Washing a microelectronic substrate with an ozonated solution following planarization and proceeding removal of a native oxide layer through acid etching.
    Type: Grant
    Filed: February 27, 1998
    Date of Patent: August 8, 2000
    Assignee: Micron Technology, Inc.
    Inventors: Eric K. Grieger, Tim J. Kennedy, Robert H. Whitney, Gunnar A. Barnhart