Patents by Inventor Nicholas A. Fichtenbaum

Nicholas A. Fichtenbaum 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: 20140099757
    Abstract: A III-N device is described with a III-N layer, an electrode thereon, a passivation layer adjacent the III-N layer and electrode, a thick insulating layer adjacent the passivation layer and electrode, a high thermal conductivity carrier capable of transferring substantial heat away from the III-N device, and a bonding layer between the thick insulating layer and the carrier. The bonding layer attaches the thick insulating layer to the carrier. The thick insulating layer can have a precisely controlled thickness and be thermally conductive.
    Type: Application
    Filed: December 11, 2013
    Publication date: April 10, 2014
    Applicant: Transphorm Inc.
    Inventors: Primit Parikh, Yuvaraj Dora, Yifeng Wu, Umesh Mishra, Nicholas Fichtenbaum, Rakesh K. Lal
  • Publication number: 20140094010
    Abstract: An electronic component includes a depletion-mode transistor, an enhancement-mode transistor, and a resistor. The depletion-mode transistor has a higher breakdown voltage than the enhancement-mode transistor. A first terminal of the resistor is electrically connected to a source of the enhancement-mode transistor, and a second terminal of the resistor and a source of the depletion-mode transistor are each electrically connected to a drain of the enhancement-mode transistor. A gate of the depletion-mode transistor can be electrically connected to a source of the enhancement-mode transistor.
    Type: Application
    Filed: October 31, 2013
    Publication date: April 3, 2014
    Applicant: Transphorm Inc.
    Inventors: Rakesh L. Lal, Robert Coffie, Yifeng Wu, Primit Parikh, Yuvaraj Dora, Umesh Mishra, Srabanti Chowdhury, Nicholas Fichtenbaum
  • Patent number: 8643062
    Abstract: A III-N device is described with a III-N layer, an electrode thereon, a passivation layer adjacent the III-N layer and electrode, a thick insulating layer adjacent the passivation layer and electrode, a high thermal conductivity carrier capable of transferring substantial heat away from the III-N device, and a bonding layer between the thick insulating layer and the carrier. The bonding layer attaches the thick insulating layer to the carrier. The thick insulating layer can have a precisely controlled thickness and be thermally conductive.
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: February 4, 2014
    Assignee: Transphorm Inc.
    Inventors: Primit Parikh, Yuvaraj Dora, Yifeng Wu, Umesh Mishra, Nicholas Fichtenbaum, Rakesh K. Lal
  • Patent number: 8598937
    Abstract: An electronic component includes a depletion-mode transistor, an enhancement-mode transistor, and a resistor. The depletion-mode transistor has a higher breakdown voltage than the enhancement-mode transistor. A first terminal of the resistor is electrically connected to a source of the enhancement-mode transistor, and a second terminal of the resistor and a source of the depletion-mode transistor are each electrically connected to a drain of the enhancement-mode transistor. A gate of the depletion-mode transistor can be electrically connected to a source of the enhancement-mode transistor.
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: December 3, 2013
    Assignee: Transphorm Inc.
    Inventors: Rakesh K. Lal, Robert Coffie, Yifeng Wu, Primit Parikh, Yuvaraj Dora, Umesh Mishra, Srabanti Chowdhury, Nicholas Fichtenbaum
  • Publication number: 20130200495
    Abstract: Embodiments of the present disclosure include a buffer structure suited for III-N device having a foreign substrate. The buffer structure can include a first buffer layer having a first aluminum composition and a second buffer layer formed on the first buffer layer, the second buffer layer having a second aluminum composition. The buffer structure further includes a third buffer layer formed on the second buffer layer at a second interface, the third buffer layer having a third aluminum composition. The first aluminum composition decreases in the first buffer layer towards the interface and the second aluminum composition throughout the second buffer layer is greater than the first aluminum composition at the interface.
    Type: Application
    Filed: February 3, 2012
    Publication date: August 8, 2013
    Applicant: TRANSPHORM INC.
    Inventors: Stacia Keller, Brian L. Swenson, Nicholas Fichtenbaum
  • Patent number: 8455885
    Abstract: Methods for the heteroepitaxial growth of smooth, high quality films of N-face GaN film grown by MOCVD are disclosed. Use of a misoriented substrate and possibly nitridizing the substrate allow for the growth of smooth N-face GaN and other Group III nitride films as disclosed herein. The present invention also avoids the typical large (?m sized) hexagonal features which make N-face GaN material unacceptable for device applications. The present invention allows for the growth of smooth, high quality films which makes the development of N-face devices possible.
    Type: Grant
    Filed: April 11, 2012
    Date of Patent: June 4, 2013
    Assignee: The Regents of the University of California
    Inventors: Stacia Keller, Umesh K. Mishra, Nicholas A. Fichtenbaum
  • Publication number: 20130088280
    Abstract: An electronic component includes a depletion-mode transistor, an enhancement-mode transistor, and a resistor. The depletion-mode transistor has a higher breakdown voltage than the enhancement-mode transistor. A first terminal of the resistor is electrically connected to a source of the enhancement-mode transistor, and a second terminal of the resistor and a source of the depletion-mode transistor are each electrically connected to a drain of the enhancement-mode transistor. A gate of the depletion-mode transistor can be electrically connected to a source of the enhancement-mode transistor.
    Type: Application
    Filed: October 7, 2011
    Publication date: April 11, 2013
    Applicant: TRANSPHORM INC.
    Inventors: Rakesh K. Lal, Robert Coffie, Yifeng Wu, Primit Parikh, Yuvaraj Dora, Umesh Mishra, Srabanti Chowdhury, Nicholas Fichtenbaum
  • Publication number: 20130062621
    Abstract: Embodiments of the present disclosure includes a III-N device having a substrate layer, a first III-N material layer on one side of the substrate layer, a second III-N material layer on the first III-N material layer, and a barrier layer disposed on another side of the substrate layer, the barrier layer being less electrically conductive than the substrate layer.
    Type: Application
    Filed: September 13, 2011
    Publication date: March 14, 2013
    Applicant: TRANSPHORM INC.
    Inventors: Nicholas Fichtenbaum, Lee McCarthy, Yifeng Wu
  • Publication number: 20120193638
    Abstract: Methods for the heteroepitaxial growth of smooth, high quality films of N-face GaN film grown by MOCVD are disclosed. Use of a misoriented substrate and possibly nitridizing the substrate allow for the growth of smooth N-face GaN and other Group III nitride films as disclosed herein. The present invention also avoids the typical large (?m sized) hexagonal features which make N-face GaN material unacceptable for device applications. The present invention allows for the growth of smooth, high quality films which makes the development of N-face devices possible.
    Type: Application
    Filed: April 11, 2012
    Publication date: August 2, 2012
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Stacia Keller, Umesh K. Mishra, Nicholas A. Fichtenbaum
  • Publication number: 20120193677
    Abstract: A III-N device is described with a III-N layer, an electrode thereon, a passivation layer adjacent the III-N layer and electrode, a thick insulating layer adjacent the passivation layer and electrode, a high thermal conductivity carrier capable of transferring substantial heat away from the III-N device, and a bonding layer between the thick insulating layer and the carrier. The bonding layer attaches the thick insulating layer to the carrier. The thick insulating layer can have a precisely controlled thickness and be thermally conductive.
    Type: Application
    Filed: February 2, 2011
    Publication date: August 2, 2012
    Applicant: TRANSPHORM INC.
    Inventors: Primit Parikh, Yuvaraj Dora, Yifeng Wu, Umesh Mishra, Nicholas Fichtenbaum
  • Publication number: 20120126239
    Abstract: A III-N layer structure is described that includes a III-N buffer layer on a foreign substrate, an additional III-N layer, a first III-N structure, and a second III-N layer structure. The first III-N structure atop the III-N buffer layer includes at least two III-N layers, each having an aluminum composition, and the III-N layer of the two III-N layers that is closer to the III-N buffer layer having the larger aluminum composition. The second III-N structure includes a III-N superlattice, the III-N superlattice including at least two III-N well layers interleaved with at least two III-N barrier layer. The first III-N structure and the second III-N structure are between the additional III-N layer and the foreign substrate.
    Type: Application
    Filed: November 24, 2010
    Publication date: May 24, 2012
    Applicant: TRANSPHORM INC.
    Inventors: Stacia Keller, Nicholas Fichtenbaum
  • Publication number: 20100289067
    Abstract: A III-N device is described has a buffer layer, a first III-N material layer on the buffer layer, a second III-N material layer on the first III-N material layer on an opposite side from the buffer layer and a dispersion blocking layer between the buffer layer and the channel layer. The first III-N material layer is a channel layer and a compositional difference between the first III-N material layer and the second III-N material layer induces a 2DEG channel in the first III-N material layer. A sheet or a distribution of negative charge at an interface of the channel layer and the dispersion blocking layer confines electrons away from the buffer layer.
    Type: Application
    Filed: May 14, 2009
    Publication date: November 18, 2010
    Applicant: TRANSPHORM INC.
    Inventors: Umesh Mishra, Lee McCarthy, Nicholas Fichtenbaum
  • Patent number: 7566580
    Abstract: Methods for the heteroepitaxial growth of smooth, high quality films of N-face GaN film grown by MOCVD are disclosed. Use of a misoriented substrate and possibly nitridizing the substrate allow for the growth of smooth N-face GaN and other Group III nitride films as disclosed herein. The present invention also avoids the typical large (?m sized) hexagonal features which make N-face GaN material unacceptable for device applications. The present invention allows for the growth of smooth, high quality films which makes the development of N-face devices possible.
    Type: Grant
    Filed: September 14, 2007
    Date of Patent: July 28, 2009
    Assignee: The Regents of the University of California
    Inventors: Stacia Keller, Umesh Kumar Mishra, Nicholas A. Fichtenbaum
  • Publication number: 20080111144
    Abstract: The present invention allows the growth of InGaN with greater compositions of Indium than traditionally available now, which pushes LED and LD wavelengths into the yellow and red portions of the color spectrum. The ability to grow with Indium at higher temperatures leads to a higher quality AlInGaN. This also allows for novel polarization-based band structure designs to create more efficient devices. Additionally, it allows the fabrication of p-GaN layers with increased conductivity, which improves device performance.
    Type: Application
    Filed: November 15, 2007
    Publication date: May 15, 2008
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Nicholas A. Fichtenbaum, Umesh K. Mishra, Stacia Keller
  • Publication number: 20080113496
    Abstract: Methods for the heteroepitaxial growth of smooth, high quality films of N-face GaN film grown by MOCVD are disclosed. Use of a misoriented substrate and possibly nitridizing the substrate allow for the growth of smooth N-face GaN and other Group III nitride films as disclosed herein. The present invention also avoids the typical large (?m sized) hexagonal features which make N-face GaN material unacceptable for device applications. The present invention allows for the growth of smooth, high quality films which makes the development of N-face devices possible.
    Type: Application
    Filed: September 14, 2007
    Publication date: May 15, 2008
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Stacia Keller, Umesh Kumar Mishra, Nicholas A. Fichtenbaum