Patents by Inventor Nurul Amin

Nurul Amin 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: 20110006276
    Abstract: A switching element that includes a first semiconductor layer, the first semiconductor layer having a first portion and a second portion; a second semiconductor layer, the second semiconductor layer having a first portion and a second portion; an insulating layer disposed between the first semiconductor layer and the second semiconductor layer; a first metal contact in contact with the first portion of the first semiconductor layer forming a first junction and in contact with the first portion of the second semiconductor layer forming a second junction; a second metal contact in contact with the second portion of the first semiconductor layer forming a third junction and in contact with the second portion of the second semiconductor layer forming a fourth junction, wherein the first junction and the fourth junction are Schottky contacts, and the second junction and the third junction are ohmic contacts.
    Type: Application
    Filed: July 13, 2009
    Publication date: January 13, 2011
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Young Pil Kim, Nurul Amin, Dadi Setiadi, Venugopalan Vaithyanathan, Wei Tian, Insik Jin
  • Publication number: 20110002161
    Abstract: A memory cell comprising a phase-change memory cell stacked in series with a resistive switch. The resistive switch has a material switchable between a high resistance state and a low resistance state by the application of a voltage. A plurality of memory cells are used to form a memory array.
    Type: Application
    Filed: July 6, 2009
    Publication date: January 6, 2011
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Insik Jin, Nurul Amin, Wei Tian, Young Pil Kim, Venugopalan Vaithyanathan, Ming Sun, Chulmin Jung
  • Patent number: 7835110
    Abstract: A micro-electromechanical systems (MEMS) disc drive includes high-precision and integrated components to allow for increased functionality, robustness and reduced size as compared to currently produced disc drives. Integrating multiple subcomponents of the disc drive using batch processing provides low manufacturing costs. Furthermore, using MEMS techniques, new features can be added to disc drives. For example, an environmental control component, an accelerometer and/or a thermometer may be integrated into the housing of the disc drive.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: November 16, 2010
    Assignee: Seagate Technology
    Inventors: Alan Johnston, Roger Hipwell, Hans Leuthold, Song S. Xue, Nurul Amin, Andrew White, Patrick Ryan, Bradley Ver Meer, John Pendray, Steven Kalderon, Wayne Bonin, Jeffery Berkowitz
  • Patent number: 7826171
    Abstract: In general, the invention is directed to techniques for integrated interconnects with a set of disc drives. The interconnects allow for a set of disc drives to be positioned in an array; for example, as set of disc drives may be stacked to communicate with a device through a single interface of the device. The interconnects may be formed as vias within the housing of the disc drives. Vias may produced using MEMS techniques, e.g., electroplating, as part of the manufacturing processes of the disc drive itself.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: November 2, 2010
    Assignee: Seagate Technology LLC
    Inventors: Alan Johnston, Roger Hipwell, Hans Leuthold, Song S. Xue, Nurul Amin, Andrew White, Patrick Ryan, Bradley Ver Meer, John Pendray, Steven Kalderon, Wayne Bonin, Jeffery Berkowitz
  • Patent number: 7810373
    Abstract: A shock sensor comprises a substrate and at least one flexure coupled to the substrate and configured to deflect upon an application of force to the shock sensor sufficient to deflect the flexure. Deflection of the at least one flexure produces a detectable change in an electrical property of the shock sensor. Examples of detectable changes in an electrical property of the shock sensor include an open circuit condition, a closed circuit condition, and a variation in voltage of a piezo-electric detector. In some embodiments, the change in the electrical property of the shock sensor may be remotely read by interrogation of a radio frequency identification transponder positioned on the substrate using a remote radio frequency identification transceiver. The disclosure also relates to a shock sensing system and method of shock detection.
    Type: Grant
    Filed: February 22, 2007
    Date of Patent: October 12, 2010
    Assignee: Seagate Technology LLC
    Inventors: Nurul Amin, Song S. Xue, Patrick J. Ryan
  • Publication number: 20100219156
    Abstract: Micro structures and methods for creating complex, 3-dimensional magnetic micro components and their application for batch-level microassembly. Included is a method for making complex, 3-dimensional magnetic structures by depositing a first photoimageable magnet/polymer material on a substrate and patterning to form at least one first active magnetic area and at least one first sacrificial area, then depositing a second photoimageable magnet/polymer material and patterning to form at least one second active magnetic area and at least one second sacrificial area, and then removing the first sacrificial area and the second sacrificial area. Also included is a micro structure self assembly method, the method including providing a substrate having at least one magnetic receptor site, and engaging a 3-dimensional magnetic micro structure having a magnetic micro component with the substrate by aligning the magnetic micro component with the magnetic receptor site.
    Type: Application
    Filed: March 2, 2009
    Publication date: September 2, 2010
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Roger Lee Hipwell, JR., Nurul Amin, Jun Zheng, Ming Sun, Haiwen Xi
  • Publication number: 20100193761
    Abstract: Programmable metallization memory cells having an active electrode, an opposing inert electrode and a variable resistive element separating the active electrode from the inert electrode. The variable resistive element includes a plurality of alternating solid electrolyte layers and electrically conductive layers. The electrically conductive layers electrically couple the active electrode to the inert electrode in a programmable metallization memory cell. Methods to form the same are also disclosed.
    Type: Application
    Filed: January 30, 2009
    Publication date: August 5, 2010
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Nurul Amin, Insik Jin, Wei Tian, Andrew James Wirebaugh, Venugopalan Vaithyanathan, Ming Sun
  • Publication number: 20100110764
    Abstract: An electronic device that includes a first programmable metallization cell (PMC) that includes an active electrode; an inert electrode; and a solid electrolyte layer disposed between the active electrode and the inert electrode; and a second PMC that includes an active electrode; an inert electrode; and a solid electrolyte layer disposed between the active electrode and the inert electrode, wherein the first and second PMCs are electrically connected in anti-parallel.
    Type: Application
    Filed: July 6, 2009
    Publication date: May 6, 2010
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Ming Sun, Nurul Amin, Insik Jin, Young Pil Kim, Chulmin Jung, Venugopalan Vaithyanathan, Wei Tian, Hai Li
  • Publication number: 20100110765
    Abstract: A non-volatile memory cell with a programmable unipolar switching element, and a method of programming the memory element are disclosed. In some embodiments, the memory cell comprises a programmable bipolar resistive sense memory element connected in series with a programmable unipolar resistive sense switching element. The memory element is programmed to a selected resistance state by application of a selected write current in a selected direction through the cell, wherein a first resistance level is programmed by passage of a write current in a first direction and wherein a second resistance level is programmed by passage of a write current in an opposing second direction. The switching element is programmed to a selected resistance level to facilitate access to the selected resistance state of the memory element.
    Type: Application
    Filed: July 6, 2009
    Publication date: May 6, 2010
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Wei Tian, Nurul Amin, Insik Jin, Ming Sun, Venu Vaithyanathan, YoungPil Kim, Chulmin Jung
  • Publication number: 20100102308
    Abstract: Programmable metallization memory cells include an electrochemically active electrode and an inert electrode and an ion conductor solid electrolyte material between the electrochemically active electrode and the inert electrode. An electrically insulating oxide layer separates the ion conductor solid electrolyte material from the electrochemically active electrode.
    Type: Application
    Filed: February 23, 2009
    Publication date: April 29, 2010
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Ming Sun, Michael Xuefei Tang, Insik Jin, Venkatram Venkatasamy, Philip George Pitcher, Nurul Amin
  • Publication number: 20100104115
    Abstract: A micro magnetic device with a micro magnetic speaker unit having a first element, a second element, and a membrane therebetween. Each of the elements comprises a body, a pole of soft magnetic material, an electrically conductive coil positioned around the pole, and a permanent magnet connected to the membrane. The first element and the second element are magnetically identical. A plurality of speaker units can be combined to provide a speaker array.
    Type: Application
    Filed: January 29, 2009
    Publication date: April 29, 2010
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Jun Zheng, Dadi Setiadi, Haiwen Xi, Insik Jin, Nurul Amin
  • Patent number: 7684150
    Abstract: The present invention relates to a head having an air bearing surface for confronting the surface of a storage medium. The head includes a first pole that is spaced apart from a second pole. At least one non-magnetic spacer is positioned between the first pole and the second pole such that the first pole is magnetically decoupled from the second pole. In a further aspect, one or both of the first pole and the second pole can be elliptical in shape.
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: March 23, 2010
    Assignee: Seagate Technology LLC
    Inventors: Taras Grigoryevich Pokhil, Nurul Amin, Steven Paul Bozeman, Steven Albert Kalderon, Andrzej Adam Stankiewicz, Ned Tabat, Pu-Ling Lu, Johannes Van Ek, Janusz Jozef Nowak, Patrick Joseph Ryan
  • Publication number: 20100021767
    Abstract: A method of fabricating a discrete track magnetic recording media. A base layer is provided onto which repeating and alternating magnetic layer and non-magnetic layers are deposited. The thickness of the magnetic layer corresponds to the width of the track of the recording media. A cylindrical rod can be used as the base layer, such that the alternating magnetic and non-magnetic layers spiraling or concentric layers around the rod. The resulting media layer can be cut or sliced into individual magnetic media or used to imprint other media discs with the discrete pattern of the media layer.
    Type: Application
    Filed: July 23, 2008
    Publication date: January 28, 2010
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Nurul Amin, Sining Mao
  • Publication number: 20090251827
    Abstract: The present invention relates to a head having an air bearing surface for confronting the surface of a storage medium. The head includes a first pole that is spaced apart from a second pole. At least one non-magnetic spacer is positioned between the first pole and the second pole such that the first pole is magnetically decoupled from the second pole. In a further aspect, one or both of the first pole and the second pole can be elliptical in shape.
    Type: Application
    Filed: June 30, 2004
    Publication date: October 8, 2009
    Applicant: Seagate Technology LLC
    Inventors: Taras Pokhil, Nurul Amin, Steven Bozeman, Steven Kalderon, Andrzej Stankiewicz, Ned Tabat, Pu-Ling Lu, Johannes Van Ek, Janusz Nowak, Patrick Ryan
  • Publication number: 20090237837
    Abstract: A method of fabricating a recording head includes depositing an insulator material onto at least a portion of a first member, wherein the insulator material forms an insulator film having a film thickness. The method further includes depositing a writer pole material onto the insulator film, wherein the writer pole material forms a writer pole member, and wherein the insulator film is between the writer pole member and a contact layer. Further, in some embodiments, the film thickness determines the distance between the writer pole member and the first contact member and also determines the distance between the writer pole member and the second contact member.
    Type: Application
    Filed: March 19, 2008
    Publication date: September 24, 2009
    Applicant: Seagate Technology LLC
    Inventors: Nurul Amin, Ibro Tabakovic, Eric S. Linville, Ming Sun
  • Patent number: 7561380
    Abstract: A transducing head has a main pole and at least one magnetic element (such as a return pole or a shield) which provides a potential return path for a magnetic field produced by the main pole. The magnetic element is spaced from the main pole. The magnetic element has a first edge closest to the main pole and a second edge furthest from the main pole. Permeability of the magnetic element increases from the first edge to the second edge.
    Type: Grant
    Filed: April 10, 2008
    Date of Patent: July 14, 2009
    Assignee: Seagate Technology LLC
    Inventors: Nurul Amin, Yuming Zhou, Kaizhong Gao, Patrick J. Ryan, Steven Kalderon, Song S. Xue, Shaoping Li, Mark T. Kief
  • Patent number: 7554765
    Abstract: A magnetic head for perpendicular recording having reduced side writing and erasing is disclosed. The writer portion of the magnetic head includes a main pole and a return pole. The main pole includes a multilayer main pole tip and a multilayer yoke. The layers of the main pole tip and the yoke are antiferromagnetically coupled to each other with a non-magnetic metal. Antiferromagnetic coupling between the layers of the main pole tip and the yoke dramatically reduces fringing flux emanated from the sides of the main pole intending to close through an upper portion of the return pole. A biasing antiferromagnetic layer is coupled to the upper portion of the return pole to bias the return pole parallel to the air bearing surface. This prevents or reduces the effect of domain wall formation in the return pole, which results in further reduction in side writing and erasing.
    Type: Grant
    Filed: June 11, 2003
    Date of Patent: June 30, 2009
    Assignee: Seagate Technology LLC
    Inventors: Alexander M. Shukh, Nurul Amin
  • Patent number: 7509748
    Abstract: The disclosure relates to micro-electromechanical systems (MEMS) and magnetic MEMS sensors. The sensors include a substrate having a surface, a first magnetic field detector positioned on the surface, a second magnetic field detector positioned on the surface proximate to the first magnetic field detector, and a third magnetic field detector positioned on the surface proximate to the first and second magnetic field detectors. Each of the first, second and third magnetic field detector is capable of detecting external magnetic fields that are mutually orthogonal along three directions. In certain embodiments, the magnetic MEMS sensors may be useful as electronic compasses. The disclosure also relates to fabricating a magnetic MEMS device, such as an electronic compass, from or on a single wafer, which includes multiple MEMS sensors.
    Type: Grant
    Filed: September 1, 2006
    Date of Patent: March 31, 2009
    Assignee: Seagate Technology LLC
    Inventors: Song Xue, Patrick Ryan, Nurul Amin
  • Patent number: 7474499
    Abstract: The present invention includes a data storage system. The data storage system includes an enclosure and at least one perpendicular recording device positioned within the enclosure and in communication with a recording medium. The recording medium includes a layer of magnetic material that has a permeability that is substantially similar to a permeability of a magnetic material in the recording device. The data storage system also includes a soft magnetic material included in the enclosure for shielding magnetic stray fields from the perpendicular recording device. The soft magnetic material has a permeability that is at least as great as approximately the permeability of the layer of magnetic material of the recording medium.
    Type: Grant
    Filed: July 27, 2005
    Date of Patent: January 6, 2009
    Assignee: Seagate Technology LLC
    Inventors: Shaoping Li, Daniel John Brown, Michael R. Montemorra, Nurul Amin
  • Publication number: 20090002883
    Abstract: A magnetic device includes a write element having a write element tip and a conductive coil for carrying a current to induce a first field from the write element. A conductor proximate the write element tip carries the current to generate a second field that augments the first field. A driver provides the current to the conductive coil and the conductor, and a circuit phase shifts the current through the conductor relative to the current through the conductive coil.
    Type: Application
    Filed: June 27, 2007
    Publication date: January 1, 2009
    Applicant: Seagate Technology LLC
    Inventors: Stefan A. Ionescu, Ladislav R. Pust, Michael T. Johnson, Nurul Amin