Patents by Inventor Kamal Tabatabaie-Alavi

Kamal Tabatabaie-Alavi 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).

  • Patent number: 11239326
    Abstract: A Field Effect Transistor (FET) structure having: a semiconductor; a first electrode structure; a second electrode structure; and a third electrode structure for controlling a flow of carriers in the semiconductor between the first electrode structure and the second electrode structure; a dielectric structure disposed over the semiconductor and extending horizontally between first electrode structure, the second electrode structure and the third electrode structure; and a fourth electrode passing into the dielectric structure and terminating a predetermined, finite distance above the semiconductor for controlling an electric field in the semiconductor under the fourth electrode structure.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: February 1, 2022
    Assignee: RAYTHEON COMPANY
    Inventors: Jeffrey R. LaRoche, Kelly P. Ip, Thomas E. Kazior, Kamal Tabatabaie Alavi
  • Patent number: 11038030
    Abstract: A Field Effect Transistor (FET) having a source, drain, and gate disposed laterally along a surface of a semiconductor and a field plate structure: having one end connected to the source; and having a second end disposed between the gate and the drain and separated from the drain by a gap. A dielectric structure is disposed over the semiconductor, having: a first portion disposed under the second end of the field plate structure; and, a second, thinner portion under the gap.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: June 15, 2021
    Assignee: Raytheon Company
    Inventors: Christopher J. MacDonald, Kenneth A. Wilson, Kamal Tabatabaie Alavi, Adrian D. Williams
  • Patent number: 10840114
    Abstract: Apparatus and method for heating a wafer having semiconductor material. The apparatus includes: a chamber, a source of radiant heat; a source of gas; and a susceptor disposed in the chamber to receive and absorb heat radiated by the source of radiant heat; the susceptor having an opening therein to allow a flow of gas to pass from the source of gas to pass through an interior region of the susceptor and over the wafer.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: November 17, 2020
    Assignee: Raytheon Company
    Inventors: Kezia Cheng, Christopher J. MacDonald, Kamal Tabatabaie Alavi, Adrian D. Williams
  • Publication number: 20200243652
    Abstract: A Field Effect Transistor (FET) having a source, drain, and gate disposed laterally along a surface of a semiconductor and a field plate structure: having one end connected to the source; and having a second end disposed between the gate and the drain and separated from the drain by a gap. A dielectric structure is disposed over the semiconductor, having: a first portion disposed under the second end of the field plate structure; and, a second, thinner portion under the gap.
    Type: Application
    Filed: April 13, 2020
    Publication date: July 30, 2020
    Applicant: Raytheon Company
    Inventors: Christopher J. MacDonald, Kenneth A. Wilson, Kamal Tabatabaie Alavi, Adrian D. Williams
  • Patent number: 10720497
    Abstract: A Field Effect Transistor (FET) having a source, drain, and gate disposed laterally along a surface of a semiconductor and a field plate structure: having one end connected to the source; and having a second end disposed between the gate and the drain and separated from the drain by a gap. A dielectric structure is disposed over the semiconductor, having: a first portion disposed under the second end of the field plate structure; and, a second, thinner portion under the gap.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: July 21, 2020
    Assignee: Raytheon Company
    Inventors: Christopher J. MacDonald, Kenneth A. Wilson, Kamal Tabatabaie Alavi, Adrian D. Williams
  • Patent number: 10541148
    Abstract: A stack of layers providing an ohmic contact with the semiconductor, a lower metal layer of the stack is disposed in direct contact with the semiconductor; and a radiation absorption control layer disposed over the lower layer for controlling an amount of the radiant energy to be absorbed in the radiation absorption control layer during exposure of the stack to the radiation during a process used to alloy the stack with the semiconductor to form the ohmic contact.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: January 21, 2020
    Assignee: Raytheon Company
    Inventors: Kezia Cheng, Kamal Tabatabaie Alavi, Adrian D. Williams, Christopher J. MacDonald, Kiuchul Hwang
  • Patent number: 10439035
    Abstract: A Schottky contact structure for a semiconductor device having a Schottky contact and an electrode for the contact structure disposed on the contact. The Schottky contact comprises: a first layer of a first metal in Schottky contact with a semiconductor; a second layer of a second metal on the first layer; a third layer of the first metal on the second layer; and a fourth layer of the second metal on the third layer. The electrode for the Schottky contact structure disposed on the Schottky contact comprises a third metal, the second metal providing a barrier against migration between the third metal and the first metal.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: October 8, 2019
    Assignee: Raytheon Company
    Inventors: Kamal Tabatabaie-Alavi, Kezia Cheng, Christopher J. MacDonald
  • Publication number: 20190237554
    Abstract: A Field Effect Transistor (FET) structure having: a semiconductor; a first electrode structure; a second electrode structure; and a third electrode structure for controlling a flow of carriers in the semiconductor between the first electrode structure and the second electrode structure; a dielectric structure disposed over the semiconductor and extending horizontally between first electrode structure, the second electrode structure and the third electrode structure; and a fourth electrode passing into the dielectric structure and terminating a predetermined, finite distance above the semiconductor for controlling an electric field in the semiconductor under the fourth electrode structure.
    Type: Application
    Filed: April 11, 2019
    Publication date: August 1, 2019
    Applicant: Raytheon Company
    Inventors: Jeffrey R. LaRoche, Kelly P. Ip, Thomas E. Kazior, Kamal Tabatabaie Alavi
  • Publication number: 20190198346
    Abstract: A stack of layers providing an ohmic contact with the semiconductor, a lower metal layer of the stack is disposed in direct contact with the semiconductor; and a radiation absorption control layer disposed over the lower layer for controlling an amount of the radiant energy to be absorbed in the radiation absorption control layer during exposure of the stack to the radiation during a process used to alloy the stack with the semiconductor to form the ohmic contact.
    Type: Application
    Filed: December 14, 2018
    Publication date: June 27, 2019
    Applicant: Raytheon Company
    Inventors: Kezia Cheng, Kamal Tabatabaie Alavi, Adrian D. Williams, Christopher J. MacDonald, Kiuchul Hwang
  • Publication number: 20190123150
    Abstract: A Field Effect Transistor (FET) having a source, drain, and gate disposed laterally along a surface of a semiconductor and a field plate structure: having one end connected to the source; and having a second end disposed between the gate and the drain and separated from the drain by a gap. A dielectric structure is disposed over the semiconductor, having: a first portion disposed under the second end of the field plate structure; and, a second, thinner portion under the gap.
    Type: Application
    Filed: October 24, 2017
    Publication date: April 25, 2019
    Applicant: Raytheon Company
    Inventors: Christopher J. MacDonald, Kenneth A. Wilson, Kamal Tabatabaie Alavi, Adrian D. Williams
  • Publication number: 20190097001
    Abstract: A Field Effect Transistor (FET) structure having: a semiconductor; a first electrode structure; a second electrode structure; and a third electrode structure for controlling a flow of carriers in the semiconductor between the first electrode structure and the second electrode structure; a dielectric structure disposed over the semiconductor and extending horizontally between first electrode structure, the second electrode structure and the third electrode structure; and a fourth electrode passing into the dielectric structure and terminating a predetermined, finite distance above the semiconductor for controlling an electric field in the semiconductor under the fourth electrode structure.
    Type: Application
    Filed: September 25, 2017
    Publication date: March 28, 2019
    Applicant: Raytheon Company
    Inventors: Jeffrey R. LaRoche, Kelly P. Ip, Thomas E. Kazior, Kamal Tabatabaie Alavi
  • Publication number: 20180323274
    Abstract: A Schottky contact structure for a semiconductor device having a Schottky contact and an electrode for the contact structure disposed on the contact. The Schottky contact comprises: a first layer of a first metal in Schottky contact with a semiconductor; a second layer of a second metal on the first layer; a third layer of the first metal on the second layer; and a fourth layer of the second metal on the third layer. The electrode for the Schottky contact structure disposed on the Schottky contact comprises a third metal, the second metal providing a barrier against migration between the third metal and the first metal.
    Type: Application
    Filed: July 12, 2018
    Publication date: November 8, 2018
    Applicant: Raytheon Company
    Inventors: Kamal Tabatabaie-Alavi, Kezia Cheng, Christopher J. MacDonald
  • Patent number: 10026823
    Abstract: A Schottky contact structure for a semiconductor device having a Schottky contact and an electrode for the contact structure disposed on the contact. The Schottky contact comprises: a first layer of a first metal in Schottky contact with a semiconductor; a second layer of a second metal on the first layer; a third layer of the first metal on the second layer; and a fourth layer of the second metal on the third layer. The electrode for the Schottky contact structure disposed on the Schottky contact comprises a third metal, the second metal providing a barrier against migration between the third metal and the first metal.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: July 17, 2018
    Assignee: Raytheon Company
    Inventors: Kamal Tabatabaie-Alavi, Kezia Cheng, Christopher J. MacDonald
  • Patent number: 10014266
    Abstract: A method and structure, the structure having a substrate, an active device in an active device semiconductor region; of the substrate, a microwave transmission line, on the substrate, electrically connected to the active device, and microwave energy absorbing “dummy” fill elements on the substrate. The method includes providing a structure having a substrate, an active device region on a surface of the structure, an ohmic contact material on the active device region, and a plurality of “dummy” fill elements on the surface to provide uniform heating of the substrate during a rapid thermal anneal process, the ohmic contact material and the “dummy” fill elements having the same radiant energy reflectivity. The rapid thermal anneal processing forms an ohmic contact between an ohmic contact material and the active device region and simultaneously converts the “dummy” fill elements into microwave lossy “dummy” fill elements.
    Type: Grant
    Filed: July 26, 2016
    Date of Patent: July 3, 2018
    Assignee: Raytheon Company
    Inventors: Fikret Altunkilic, Adrian D. Williams, Christopher J. MacDonald, Kamal Tabatabaie Alavi
  • Publication number: 20180033744
    Abstract: A method and structure, the structure having a substrate, an active device in an active device semiconductor region; of the substrate, a microwave transmission line, on the substrate, electrically connected to the active device, and microwave energy absorbing “dummy” fill elements on the substrate. The method includes providing a structure having a substrate, an active device region on a surface of the structure, an ohmic contact material on the active device region, and a plurality of “dummy” fill elements on the surface to provide uniform heating of the substrate during a rapid thermal anneal process, the ohmic contact material and the “dummy” fill elements having the same radiant energy reflectivity. The rapid thermal anneal processing forms an ohmic contact between an ohmic contact material and the active device region and simultaneously converts the “dummy” fill elements into microwave lossy “dummy” fill elements.
    Type: Application
    Filed: July 26, 2016
    Publication date: February 1, 2018
    Applicant: Raytheon Company
    Inventors: Fikret Altunkilic, Adrian D. Williams, Christopher J. MacDonald, Kamal Tabatabaie Alavi
  • Patent number: 7902083
    Abstract: According to one embodiment of the disclosure, a method for passivating a circuit device generally includes providing a substrate having a substrate surface, forming an electrical component on the substrate surface, and coating the substrate surface and the electrical component with a first protective dielectric layer. The first protective dielectric layer is made of a generally moisture insoluble material having a moisture permeability less than 0.01 gram/meter2/day, a moisture absorption less than 0.04 percent, a dielectric constant less than 10, a dielectric loss less than 0.005, a breakdown voltage strength greater than 8 million volts/centimeter, a sheet resistivity greater than 1015 ohm-centimeter, and a defect density less than 0.5/centimeter2.
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: March 8, 2011
    Assignee: Raytheon Company
    Inventors: John M. Bedinger, Michael A. Moore, Robert B. Hallock, Kamal Tabatabaie Alavi, Thomas E. Kazior
  • Patent number: 7767589
    Abstract: According to one embodiment of the disclosure, a method for passivating a circuit device generally includes providing a substrate having a substrate surface, forming an electrical component on the substrate surface, and coating the substrate surface and the electrical component with a first protective dielectric layer. The first protective dielectric layer is made of a generally moisture insoluble material having a moisture permeability less than 0.01 gram/meter2/day, a moisture absorption less than 0.04 percent, a dielectric constant less than 10, a dielectric loss less than 0.005, a breakdown voltage strength greater than 8 million volts/centimeter, a sheet resistivity greater than 1015 ohm-centimeter, and a defect density less than 0.5/centimeter2.
    Type: Grant
    Filed: August 31, 2007
    Date of Patent: August 3, 2010
    Assignee: Raytheon Company
    Inventors: John M. Bedinger, Michael A. Moore, Robert B. Hallock, Kamal Tabatabaie Alavi, Thomas E. Kazior
  • Publication number: 20100120254
    Abstract: According to one embodiment of the disclosure, a method for passivating a circuit device generally includes providing a substrate having a substrate surface, forming an electrical component on the substrate surface, and coating the substrate surface and the electrical component with a first protective dielectric layer. The first protective dielectric layer is made of a generally moisture insoluble material having a moisture permeability less than 0.01 gram/meter2/day, a moisture absorption less than 0.04 percent, a dielectric constant less than 10, a dielectric loss less than 0.005, a breakdown voltage strength greater than 8 million volts/centimeter, a sheet resistivity greater than 1015 ohm-centimeter, and a defect density less than 0.5/centimeter2.
    Type: Application
    Filed: January 21, 2010
    Publication date: May 13, 2010
    Applicant: Raytheon Company
    Inventors: John M. Bedinger, Michael A. Moore, Robert B. Hallock, Kamal Tabatabaie Alavi, Thomas E. Kazior
  • Publication number: 20080185174
    Abstract: According to one embodiment of the disclosure, a method for passivating a circuit device generally includes providing a substrate having a substrate surface, forming an electrical component on the substrate surface, and coating the substrate surface and the electrical component with a first protective dielectric layer. The first protective dielectric layer is made of a generally moisture insoluble material having a moisture permeability less than 0.01 gram/meter2/day, a moisture absorption less than 0.04 percent, a dielectric constant less than 10, a dielectric loss less than 0.005, a breakdown voltage strength greater than 8 million volts/centimeter, a sheet resistivity greater than 1015 ohm-centimeter, and a defect density less than 0.5/centimeter2.
    Type: Application
    Filed: August 31, 2007
    Publication date: August 7, 2008
    Inventors: John M. Bedinger, Michael A. Moore, Robert B. Hallock, Kamal Tabatabaie Alavi, Thomas E. Kazior
  • Patent number: 5986324
    Abstract: A bipolar transistor having a pair of transistor cells formed on a single crystal substrate. Each one of the cells including a collector electrode, an elongated emitter electrode and a base electrode disposed over a first surface of the substrate. The base electrode is adapted to control a flow of carriers between the collector and emitter electrodes. An emitter pad is disposed over the first surface of the substrate. A pair of conductive, air-bridge members is provided. First ends of the bridge members are connected to the emitter pad and second ends of the bridge members are connected along a length of the elongated emitter electrode. The substrate has an emitter contact disposed on a second surface of the substrate. The emitter pad and the emitter contact are electrically connected by an electrically conductive via passing through the substrate between the first and second surfaces of the substrate.
    Type: Grant
    Filed: April 11, 1997
    Date of Patent: November 16, 1999
    Assignee: Raytheon Company
    Inventors: Michael G. Adlerstein, Mark P. Zaitlin, Kamal Tabatabaie-Alavi