Patents by Inventor John T. Pham

John T. Pham 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: 20240149573
    Abstract: Multilayer films comprising polyolefins and products comprising the multilayer films are disclosed. These multilayer films have fewer defects, especially optical defects.
    Type: Application
    Filed: February 28, 2022
    Publication date: May 9, 2024
    Inventors: Venu M. KONDURU, John E. KOVALCHUK, Meng LI, Hoang T. PHAM, Jihui SHANG
  • Patent number: 7271019
    Abstract: Disclosed are a semiconductor device and method of manufacturing the same comprising a substrate, a mesa region adjacent to the substrate, an electroplated metal layer, for reducing the thermal resistance of the device, surrounding the mesa region, an insulator layer separating a side portion of the mesa region from the electroplated metal layer, a heat sink, a bonding layer adjacent to the heat sink, and a second metal layer in between the substrate and the heat sink, wherein the substrate is adjacent to the bonding layer, and wherein the electroplated metal layer dimensioned and configured to have a thickness of at least half a thickness of the mesa region; and to laterally spread heat away from the mesa region. The mesa region comprises a first cladding layer adjacent to the substrate, an active region adjacent the first cladding layer, and a second cladding layer adjacent to the active region.
    Type: Grant
    Filed: June 9, 2006
    Date of Patent: September 18, 2007
    Assignee: United States of America as represented by the Secretary of the Army
    Inventors: John T. Pham, John D. Bruno, Richard L. Tober
  • Patent number: 7061022
    Abstract: Disclosed are a semiconductor device and method of manufacturing the same comprising a substrate, a mesa region adjacent to the substrate, an electroplated metal layer, for reducing the thermal resistance of the device, surrounding the mesa region, an insulator layer separating a side portion of the mesa region from the electroplated metal layer, a heat sink, a bonding layer adjacent to the heat sink, and a second metal layer in between the substrate and the heat sink, wherein the substrate is adjacent to the bonding layer, and wherein the electroplated metal layer dimensioned and configured to have a thickness of at least half a thickness of the mesa region; and to laterally spread heat away from the mesa region. The mesa region comprises a first cladding layer adjacent to the substrate, an active region adjacent the first cladding layer, and a second cladding layer adjacent to the active region.
    Type: Grant
    Filed: August 24, 2004
    Date of Patent: June 13, 2006
    Assignee: United States of America as Represented by the Secretary of the Army
    Inventors: John T. Pham, John D. Bruno, Richard L. Tober
  • Patent number: 6500688
    Abstract: An interband cascade (IC) light emitting device having narrow ridges, and a method of growing and fabricating the IC light emitting device is disclosed. The IC light emitting device produced by the method of the present invention has 18 active regions separated by n-type injection regions and a plurality of coupled quantum wells of Al(In)Sb, InAs, and Ga(In)Sb layers. The IC light emitting device produced according to the present method has a differential external quantum efficiency of at least 500%, a peak power output of at least 4W/facet, a power conversion efficiency of at least 14% in continuous wave at 80K, a power conversion efficiency of at least 18% in pulsed wave operation at 80K, a continuous wave operation temperature of 142 K or less, a thermal resistance of from about 24-29 K*cm2/kW and continuous wave output powers of at least 100 mW/facet at temperatures above 77K.
    Type: Grant
    Filed: March 14, 2001
    Date of Patent: December 31, 2002
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: John D. Bruno, John T. Pham
  • Publication number: 20020131463
    Abstract: An interband cascade (IC) light emitting device having narrow ridges, and a method of growing and fabricating the IC light emitting device is disclosed. The IC light emitting device produced by the method of the present invention has 18 active regions separated by n-type injection regions and a plurality of coupled quantum wells of Al(In)Sb, InAs, and Ga(In)Sb layers. The IC light emitting device produced according to the present method has a differential external quantum efficiency of at least 500%, a peak power output of at least 4W/facet, a power conversion efficiency of at least 14% in continuous wave at 80K, a power conversion efficiency of at least 18% in pulsed wave operation at 80K, a continuous wave operation temperature of 142 K or less, a thermal resistance of from about 24-29 K*cm2/kW and continuous wave output powers of at least 100 mW/facet at temperatures above 77K.
    Type: Application
    Filed: March 14, 2001
    Publication date: September 19, 2002
    Inventors: John D. Bruno, John T. Pham