Patents by Inventor John T. Chaffee

John T. Chaffee 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: 20070148890
    Abstract: A method for pseudomorphic growth and integration of a strain-compensated metastable and/or unstable compound base having incorporated oxygen and an electronic device incorporating the base is described. The strain-compensated base is doped by substitutional and/or interstitial placement of a strain-compensating atomic species. The electronic device may be, for example, a SiGe NPN HBT.
    Type: Application
    Filed: December 27, 2005
    Publication date: June 28, 2007
    Inventors: Darwin G. Enicks, John T. Chaffee, Damian A. Carver
  • Patent number: 6855618
    Abstract: A method for manufacturing a radiation hardened semiconductor device, having defined active region and isolation region. The isolation region containing an isolation material and active region containing a transition region between active and isolation region, sometimes denoted a bird's beak region. Wherein the transition region is implanted with germanium and boron, to prevent formation of leakage paths between active devices, or within an active device. The implanted area can be further limited to that area of the transition region that is adapted to be covered by a gate material, such as polysilicon.
    Type: Grant
    Filed: October 30, 2002
    Date of Patent: February 15, 2005
    Assignee: Aeroflex Colorado Springs, Inc.
    Inventors: Richard L. Woodruff, Scott M. Tyson, John T. Chaffee, David B. Kerwin
  • Publication number: 20040166648
    Abstract: A method for manufacturing a radiation hardened semiconductor device, having defined active region and isolation region. The isolation region containing an isolation material and active region containing a transition region between active and isolation region, sometimes denoted a bird's beak region. Wherein the transition region is doped with germanium and boron, to prevent formation of leakage paths between active devices, or within an active device. The doped area can be further limited to that area of the transition region that is adapted to be covered by a gate material, such as polysilicon.
    Type: Application
    Filed: October 30, 2002
    Publication date: August 26, 2004
    Inventors: Richard L. Woodruff, Scott M. Tyson, John T. Chaffee, David B. Kerwin
  • Patent number: 6511893
    Abstract: A method for manufacturing a radiation hardened semiconductor device, having defined active region and isolation region. The isolation region containing an isolation material and active region containing a transition region between active and isolation region, sometimes denoted a bird's beak region. Wherein the transition region is implanted with germanium and boron, to prevent formation of leakage paths between active devices, or within an active device. The implanted area can be further limited to that area of the transition region that is adapted to be covered by a gate material, such as polysilicon.
    Type: Grant
    Filed: May 5, 1998
    Date of Patent: January 28, 2003
    Assignee: Aeroflex UTMC Microelectronics, Inc.
    Inventors: Richard L. Woodruff, Scott M. Tyson, John T. Chaffee, David B. Kerwin
  • Patent number: 6063690
    Abstract: A method of forming a recessed electrically-insulating field oxide region in a semiconductor substrate is disclosed.
    Type: Grant
    Filed: December 29, 1997
    Date of Patent: May 16, 2000
    Assignee: UTMC Microelectronics Systems Inc.
    Inventors: Richard L. Woodruff, David B. Kerwin, John T. Chaffee
  • Patent number: 5037781
    Abstract: A radiation-hardened field oxide comprises a thin layer of high-quality thermal oxide, a thick layer of borophosphosilica glass and a diffusion barrier layer of undoped oxide, with the boron and phosphorous provising recombination sites for electron-hole pairs.
    Type: Grant
    Filed: July 5, 1988
    Date of Patent: August 6, 1991
    Assignee: United Technologies Corporation
    Inventors: Richard L. Woodruff, John T. Chaffee, Craig Hafer