Patents by Inventor Asif Khan

Asif Khan 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: 8304756
    Abstract: An ultra-violet emitting light-emitting device and method for fabricating an ultraviolet light emitting device (LED) with an AlInGaN multiple-quantum-well active region exhibiting stable cw-powers. The LED includes a template with an ultraviolet light-emitting structure on it. The template includes a first buffer layer on a substrate, then a second buffer layer on the first preferably with a strain-relieving layer in both buffer layers. Next there is a semiconductor layer having a first type of conductivity followed by a layer providing a quantum-well region with an emission spectrum ranging from 190 nm to 369 nm. Another semiconductor layer having a second type of conductivity is applied next. Two metal contacts are applied to this construction, one to the semiconductor layer having the first type of conductivity and the other to the semiconductor layer having the second type of conductivity, to complete the LED.
    Type: Grant
    Filed: October 17, 2007
    Date of Patent: November 6, 2012
    Assignee: Nitek, Inc.
    Inventor: Asif Khan
  • Patent number: 8242484
    Abstract: The invention is a vertical geometry light emitting diode capable of emitting light in the electromagnetic spectrum having a substrate, a lift-off layer, a strain relieved superlattice layer, a first doped layer, a multilayer quantum wells comprising alternating layers quantum wells and barrier layers, a second doped layer, a third doped layer and a metallic contact that is in a vertical geometry orientation. The different layers consist of a compound with the formula AlxlnyGa(1-x-y)N, wherein x is more than 0 and less than or equal to 1, y is from 0 to 1 and x+y is greater than 0 and less than or equal to 1. The barrier layer on each surface of the quantum well has a band gap larger than a quantum well bandgap. The first and second doped layers have different conductivities. The contact layer has a different conductivity than the third doped layer.
    Type: Grant
    Filed: October 17, 2007
    Date of Patent: August 14, 2012
    Assignee: Nitek, Inc.
    Inventor: Asif Khan
  • Patent number: 8222669
    Abstract: A device for forming a Group III-V semiconductor on a substrate. The device has a primary chamber comprising a substrate and a heat source for heating the substrate to a first temperature. A secondary chamber comprises a metal source and a second heat source for heating the secondary chamber to a second temperature. A first source is provided which is capable of providing HCl to the secondary chamber wherein the HCl and the metal form metal chloride. A metal-organic source is provided. A metal chloride source is provided which comprises a metal chloride. At least one of the metal chloride, the metal-organic and the second metal chloride react with the nitrogen containing compound to form a Group III-V semiconductor on the substrate.
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: July 17, 2012
    Assignee: Nitek, Inc.
    Inventors: Asif Khan, Qhalid Fareed
  • Publication number: 20120145994
    Abstract: An improved process for forming a UV emitting diode is described. The process includes providing a substrate. A super-lattice is formed directly on the substrate at a temperature of at least 800 to no more than 1,300° C. wherein the super-lattice comprises AlxInyGa1-x-yN wherein 0<x?1, 0?y?1 and 0<x+y?1. A first conductive layer with a first type of conductivity is formed on the super-lattice wherein the first conductive layer comprises AlxInyGa1-x-yN wherein 0<x?1, 0?y?1 and 0<x+y?1. A quantum well region is formed on the first conductive layer wherein the quantum well region comprises AlxInyGa1-x-yN wherein 0<x?1, 0?y?1 and 0<x+y?1. A second conductive layer is formed on the quantum well with a second type of conductivity wherein the second conductive layer comprises AlxInyGa1-x-yN wherein 0<x?1, 0?y?1 and 0<x+y?1.
    Type: Application
    Filed: February 23, 2012
    Publication date: June 14, 2012
    Applicant: Nitek, Inc
    Inventors: Vinod ADIVARAHAN, Qhalid Fareed, Asif Khan
  • Publication number: 20120034718
    Abstract: A vertical geometry light emitting diode with a strain relieved superlattice layer on a substrate comprising doped AlXInYGa1-X-YN. A first doped layer is on the strain relieved superlattice layer AlXInYGa1-X-YN and the first doped layer has a first conductivity. A multilayer quantum well is on the first doped layer comprising alternating layers quantum wells and barrier layers. The multilayer quantum well terminates with a barrier layer on each side thereof. A second doped layer is on the quantum well wherein the second doped layer comprises AlXInYGa1-X-YN and said second doped layer has a different conductivity than said first doped layer. A contact layer is on the third doped layer and the contact layer has a different conductivity than the third doped layer. A metallic contact is in a vertical geometry orientation.
    Type: Application
    Filed: September 7, 2011
    Publication date: February 9, 2012
    Applicant: Nitek, Inc.
    Inventor: Asif Khan
  • Patent number: 8102843
    Abstract: An apparatus and method are provided that enable I/O devices to be shared among multiple operating system domains. The apparatus has a first plurality of I/O ports, a second I/O port, and core logic. The first plurality of I/O ports is coupled to a plurality of operating system domains through a PCI Express fabric. Each of the first plurality of I/O ports is configured to route PCI Express transactions between said plurality of operating system domains and the switching apparatus. The second I/O port is coupled to a first shared input/output endpoint, where the first shared input/output endpoint is configured to request/complete said PCI Express transactions for each of the plurality of operating system domains. The core logic is coupled to the first plurality of I/O ports and the second I/O port. The core logic routes the PCI Express transactions between the first plurality of I/O ports and the second I/O port.
    Type: Grant
    Filed: April 19, 2004
    Date of Patent: January 24, 2012
    Assignee: Emulex Design and Manufacturing Corporation
    Inventors: Christopher J. Pettey, Asif Khan, Annette Pagan, Richard E. Pekkala, Robert Haskell Utley
  • Publication number: 20110220867
    Abstract: A light emitting device with an ultraviolet light-emitting structure having a first layer with a first conductivity, a second layer with a second conductivity; and a light emitting quantum well region between the first layer and second layer. A first electrical contact is in electrical connection with the first layer and a second electrical contact is in electrical connection with the second layer. A template serves as a platform for the light-emitting structure. The template has a micro-undulated buffer layer with AlxInyGa1-x-yN, wherein 0<x?1, 0?y?1 and 0<x+y?1, and a second buffer layer over the micro-undulated buffer layer. The second buffer layer is made of AlxInyGa1-x-yN, wherein 0<x?1, 0?y?1, 0<x+y?1. When an electrical potential is applied to the first electrical contact and the second electrical contact the device emits ultraviolet light.
    Type: Application
    Filed: March 27, 2009
    Publication date: September 15, 2011
    Inventors: Asif Khan, Qhalid Fareed
  • Patent number: 7979592
    Abstract: A computer system includes a shared I/O device including functions providing access to device local memory space, and a plurality of roots coupled to the shared I/O device via a switch fabric. A first root assigns a first address in a first root memory space to a first function. A second root assigns a second address in a second root memory space to a second function. The switch fabric maps the first root memory space to a first portion of device local memory space and the second root memory space to a second portion of device local memory space. Subsequently, the switch receives a data transaction request from the first root targeted to the first address, translates the first address to a corresponding location in the first portion of the device local memory space based on the mapping, and routes the data transaction request to the I/O device.
    Type: Grant
    Filed: February 9, 2008
    Date of Patent: July 12, 2011
    Assignee: Emulex Design and Manufacturing Corporation
    Inventors: Christopher J. Pettey, Stephen Glaser, Asif Khan, Jon Nalley, Stephen Rousset, Tom Saeger, Robert Haskell Utley
  • Publication number: 20110127571
    Abstract: A device for forming a Group III-V semiconductor on a substrate. The device has a primary chamber comprising a substrate and a heat source for heating the substrate to a first temperature. A secondary chamber comprises a metal source and a second heat source for heating the secondary chamber to a second temperature. A first source is provided which is capable of providing HCl to the secondary chamber wherein the HCl and the metal form metal chloride. A metal-organic source is provided. A metal chloride source is provided which comprises a metal chloride. At least one of the metal chloride, the metal-organic and the second metal chloride react with the nitrogen containing compound to form a Group III-V semiconductor on the substrate.
    Type: Application
    Filed: March 27, 2009
    Publication date: June 2, 2011
    Applicant: NITEK, INC.
    Inventors: Asif Khan, Qhalid Fareed
  • Patent number: 7953074
    Abstract: An apparatus and method are provided that enable I/O devices to be shared among multiple operating system domains. The apparatus includes a first plurality of I/O ports, a second I/O port, and a plurality of port initialization logic elements. The first plurality of I/O ports is coupled to a plurality of operating system domains through a load-store fabric. Each of the first plurality of I/O ports routes transactions between the plurality of operating system domains and the switching apparatus. The second I/O port is coupled to a first shared input/output endpoint. The first shared input/output endpoint is configured to request/complete the transactions for each of the plurality of operating system domains. One of the plurality of port initialization logic elements is coupled to the second I/O port and remaining ones of the plurality of port initialization logic elements are each coupled to a corresponding one of the first plurality of I/O ports.
    Type: Grant
    Filed: January 31, 2005
    Date of Patent: May 31, 2011
    Assignee: Emulex Design and Manufacturing Corporation
    Inventors: Christopher J. Pettey, Asif Khan, Annette Pagan, Richard E. Pekkala, Robert Haskell Utley
  • Publication number: 20110108887
    Abstract: An improved high breakdown voltage semiconductor device and method for manufacturing is provided. The device has a substrate and a AlaGa1-aN layer on the substrate wherein 0.1?a?1.00. A GaN layer is on the AlaGa1-aN layer. An In1-bGabN/GaN channel layer is on the GaN layer wherein 0.1?b?1.00. A AlcIndGa1-c-dN spacer layer is on the In1-bGabN/GaN layer wherein 0.1?c?1.00 and 0.0?d?0.99. A AleIn1-eN nested superlattice barrier layer is on the AlcIndGa1-c-dN spacer layer wherein 0.10?e?0.99. A AlfIngGa1-f-gN leakage suppression layer is on the AleIn1-eN barrier layer wherein 0.1?f?0.99 and 0.1?g?0.99 wherein the leakage suppression layer decreases leakage current and increases breakdown voltage during high voltage operation. A superstructure, preferably with metallic electrodes, is on the AlfIngGa1-f-gN leakage suppression layer.
    Type: Application
    Filed: November 8, 2010
    Publication date: May 12, 2011
    Inventors: Qhalid Fareed, Vinod Adivarahan, Asif Khan
  • Publication number: 20110073838
    Abstract: Ultraviolet light emitting illuminator, and method for fabricating same, comprises an array of ultraviolet light emitting diodes and a first and a second terminal. When an alternating current is applied across the first and second terminals and thus to each of the diodes, the illuminator emits ultraviolet light at a frequency corresponding to that of the alternating current. The illuminator includes a template with ultraviolet light emitting quantum wells, a first buffer layer with a first type of conductivity and a second buffer layer with a second type of conductivity, all deposited preferably over a strain-relieving layer. A first and second metal contact are applied to the semiconductor layers having the first and second type of conductivity, respectively, to complete the LED. The emission spectrum ranges from 190 nm to 369 nm. The illuminator may be configured in various materials, geometries, sizes and designs.
    Type: Application
    Filed: June 6, 2009
    Publication date: March 31, 2011
    Inventors: Asif Khan, Vinod Adivarahan, Qhalid Fareed
  • Patent number: 7917658
    Abstract: An apparatus and method are provided that enable I/O devices to be shared among multiple operating system domains. The apparatus has a first plurality of I/O ports, a second I/O port, and link training logic. The first plurality of I/O ports is coupled to a plurality of operating system domains through a load-store fabric. Each of the first plurality of I/O ports is configured to route transactions between the plurality of operating system domains and the switching apparatus. The second I/O port is coupled to a first shared input/output endpoint. The first shared input/output endpoint is configured to request/complete the transactions for each of the plurality of operating system domains. The link training logic is coupled to the second I/O port. The link training logic initializes a link between the second I/O port and the first shared input/output endpoint to support the transactions corresponding to the each of the plurality of operating system domains.
    Type: Grant
    Filed: May 25, 2008
    Date of Patent: March 29, 2011
    Assignee: Emulex Design and Manufacturing Corporation
    Inventors: Christopher J. Pettey, Asif Khan, Annette Pagan, Richard E. Pekkala, Robert Haskell Utley
  • Publication number: 20110017976
    Abstract: A light emitting device with a template comprising a substrate and a nested superlattice. The superlattice has Al1-x-yInyGaxN wherein 0?x?? and 0?y?1 with x increasing with distance from said substrate. An ultraviolet light-emitting structure on the template has a first layer with a first conductivity comprising Al1-x-yInyGaxN wherein ??x; a light emitting quantum well region above the first layer comprising Al1-x-yInyGaxN wherein ??x?b; and a second layer over the light emitting quantum well with a second conductivity comprising Al1-x-yInyGaxN wherein b?x. The light emitting device also has a first electrical contact in electrical connection with the first layer, a second electrical contact in electrical connection with the second layer; and the device emits ultraviolet light.
    Type: Application
    Filed: March 27, 2009
    Publication date: January 27, 2011
    Applicant: NITEK, INC
    Inventors: Asif Khan, Qhalid Fareed
  • Publication number: 20110012089
    Abstract: A low resistance light emitting device with an ultraviolet light-emitting structure having a first layer with a first conductivity, a second layer with a second conductivity; and a light emitting quantum well region between the first layer and second layer. A first electrical contact is in electrical connection with the first layer and a second electrical contact is in electrical connection with the second layer. A template serves as a platform for the light-emitting structure. The ultraviolet light-emitting structure has a first layer having a first portion and a second portion of AlXInYGa(1-X-Y)N with an amount of elemental indium, the first portion surface being treated with silicon and indium containing precursor sources, and a second layer. When an electrical potential is applied to the first layer and the second layer the device emits ultraviolet light.
    Type: Application
    Filed: March 27, 2009
    Publication date: January 20, 2011
    Inventors: Asif Khan, Qhalid Fareed, Vinod Adivarahan
  • Publication number: 20100320440
    Abstract: An ultra-violet emitting light-emitting device and method for fabricating an ultraviolet light emitting device (LED) with an AlInGaN multiple-quantum-well active region exhibiting stable cw-powers. The LED includes a template with an ultraviolet light-emitting structure on it. The template includes a first buffer layer on a substrate, then a second buffer layer on the first preferably with a strain-relieving layer in both buffer layers. Next there is a semiconductor layer having a first type of conductivity followed by a layer providing a quantum-well region with an emission spectrum ranging from 190 nm to 369 nm. Another semiconductor layer having a second type of conductivity is applied next. Two metal contacts are applied to this construction, one to the semiconductor layer having the first type of conductivity and the other to the semiconductor layer having the second type of conductivity, to complete the LED.
    Type: Application
    Filed: October 17, 2007
    Publication date: December 23, 2010
    Inventor: Asif KHAN
  • Publication number: 20100314605
    Abstract: The invention is a vertical geometry light emitting diode capable of emitting light in the electromagnetic spectrum having a substrate, a lift-off layer, a strain relieved superlattice layer, a first doped layer, a multilayer quantum wells comprising alternating layers quantum wells and barrier layers, a second doped layer, a third doped layer and a metallic contact that is in a vertical geometry orientation. The different layers consist of a compound with the formula AlxlnyGa(1-x-y)N, wherein x is more than 0 and less than or equal to 1, y is from 0 to 1 and x+y is greater than 0 and less than or equal to 1. The barrier layer on each surface of the quantum well has a band gap larger than a quantum well bandgap. The first and second doped layers have different conductivities.
    Type: Application
    Filed: October 17, 2007
    Publication date: December 16, 2010
    Inventor: Asif Khan
  • Patent number: 7836211
    Abstract: An apparatus and method are provided that enable I/O devices to be shared and/or partitioned among a plurality of operating system domains within the load-store fabric of each of the operating system domains without requiring modification to the operating system or driver software of the operating system domains. The apparatus includes sharing logic and a first shared input/output (I/O) endpoint. The sharing logic is coupled to a plurality of operating system domains through a load-store fabric. The sharing logic routes transactions between the plurality of operating system domains. The first shared input/output (I/O) endpoint is coupled to the sharing logic. The first shared I/O endpoint requests/completes the transactions for the each of said plurality of operating system domains according to a variant of a protocol that encapsulates an OS domain header within a transaction layer packet.
    Type: Grant
    Filed: March 16, 2004
    Date of Patent: November 16, 2010
    Assignee: Emulex Design and Manufacturing Corporation
    Inventors: Christopher J. Pettey, Asif Khan, Annette Pagan, Richard E. Pekkala, Robert Haskell Utley
  • Publication number: 20100264401
    Abstract: An ultra-violet light-emitting diode (LED) array, 12, and method for fabricating same with an AlInGaN multiple-quantum-well active region, 500, exhibiting stable cw-powers. The LED includes a template, 10, with an ultraviolet light-emitting array structure on it. The template includes a first buffer layer, 321, then a second buffer layer, 421, on the first preferably with a strain-relieving layer in both buffer layers. Next there is a semiconductor layer having a first type of conductivity, 500, followed by a layer providing a quantum-well region, 600, with an emission spectrum ranging from 190 nm to 369 nm. Another semiconductor layer having a second type of conductivity is applied next, 800. A first metal contact, 980, is a charge spreading layer in electrical contact with the first layer and between the array of LED's. A second contact, 990, is applied to the semiconductor layer having the second type of conductivity, to complete the LED.
    Type: Application
    Filed: August 13, 2008
    Publication date: October 21, 2010
    Inventors: Vinod Adivarahan, Asif Khan, Rubina Khan
  • Publication number: 20100213436
    Abstract: An ultra-violet light-emitting device and method for fabricating an ultraviolet light emitting device, 12, (LED or an LD) with an AlInGaN multiple-quantum-well active region, 10, exhibiting stable cw-powers. The device includes a non c-plane template with an ultraviolet light-emitting structure thereon. The template includes a first buffer layer, 321, on a substrate, 100, then a second buffer layer, 421, on the first preferably with a strain-relieving layer, 302, in both buffer layers. Next there is a semi-conductor layer having a first type of conductivity, 500, followed by a layer providing a quantum-well region, 600. Another semi-conductor layer, 700, having a second type of conductivity is applied next. Two metal contacts, 980 and 990, are applied to this construction, one to the semiconductor layer having the first type of conductivity and the other to the semiconductor layer having the second type of conductivity, to complete the light emitting device.
    Type: Application
    Filed: May 8, 2008
    Publication date: August 26, 2010
    Inventor: Asif Khan