Patents by Inventor Robert F. Donadio

Robert F. Donadio 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).

  • MBE deposition method employing effusion cell having a unibody crucible
    Patent number: 5932294
    Abstract: A unibody, monolithic, one-piece negative draft crucible for a MBE effusion cell. The crucible maximizes capacity, uniformity and long term flux stability, and minimizes oval defects, depletion effects, and short term shutter-related flux transients. The invention also provides a method and mandrel apparatus for making a unibody containment structure, such as a crucible formed of PBN, having a negative draft, via chemical vapor deposition.
    Type: Grant
    Filed: March 12, 1997
    Date of Patent: August 3, 1999
    Assignee: Chorus Corporation
    Inventors: Paul E. Colombo, Robert F. Donadio
  • Unibody crucible and effusion source employing such a crucible
    Patent number: 5827371
    Abstract: A unibody, monolithic, one-piece negative draft crucible for an MBE effusion source. The crucible maximizes capacity, uniformity and long term flux stability, and minimizes oval defects, depletion effects, and short term shutter-related flux transients. The invention also includes an effusion source employing such a crucible, as well as a method and mandrel apparatus for making a unibody containment structure, such as a crucible formed of PBN, having a negative draft, via chemical vapor deposition.
    Type: Grant
    Filed: August 29, 1996
    Date of Patent: October 27, 1998
    Assignee: Chorus Corporation
    Inventors: Paul E. Colombo, Robert F. Donadio
  • Unibody crucible and effusion cell employing such a crucible
    Patent number: 5820681
    Abstract: A unibody, monolithic, one-piece negative draft crucible for a MBE effusion cell. The crucible maximizes capacity, uniformity and long term flux stability, and minimizes oval defects, depletion effects, and short term shutter-related flux transients. The invention also provides a method and mandrel apparatus for making a unibody containment structure, such as a crucible formed of PBN, having a negative draft, via chemical vapor deposition.
    Type: Grant
    Filed: May 3, 1995
    Date of Patent: October 13, 1998
    Assignee: Chorus Corporation
    Inventors: Paul E. Colombo, Robert F. Donadio
  • Chemical vapor deposition method
    Patent number: 5800753
    Abstract: A method and mandrel apparatus for making a unibody containment structure, such as an molecular beam epitaxy cell crucible, with a negative draft portion, via chemical vapor deposition.
    Type: Grant
    Filed: October 31, 1996
    Date of Patent: September 1, 1998
    Assignee: Performance Materials, Inc.
    Inventor: Robert F. Donadio