Patents by Inventor Allan T. Hurst

Allan T. Hurst 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: 7821048
    Abstract: The semiconductor industry seeks to replace traditional volatile memory devices with improved non-volatile memory devices. The increased demand for a significantly advanced, efficient, and non-volatile data retention technique has driven the development of integrated magnetic memory structures. In one aspect, the present teachings relate to magnetic memory structure fabrication techniques in a high density configuration that includes an efficient means for programming high density magnetic memory structures.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: October 26, 2010
    Assignee: Micron Technology, Inc.
    Inventors: Allan T. Hurst, Jeffrey Sather, Jason B. Gadbois
  • Publication number: 20090073757
    Abstract: The semiconductor industry seeks to replace traditional volatile memory devices with improved non-volatile memory devices. The increased demand for a significantly advanced, efficient, and non-volatile data retention technique has driven the development of integrated magnetic memory structures. In one aspect, the present teachings relate to magnetic memory structure fabrication techniques in a high density configuration that includes an efficient means for programming high density magnetic memory structures.
    Type: Application
    Filed: November 25, 2008
    Publication date: March 19, 2009
    Applicant: Micron Technology, Inc.
    Inventors: Allan T. Hurst, Jeffrey Sather, Jason B. Gadbois
  • Patent number: 7459739
    Abstract: The semiconductor industry seeks to replace traditional volatile memory devices with improved non-volatile memory devices. The increased demand for a significantly advanced, efficient, and non-volatile data retention technique has driven the development of integrated magnetic memory structures. In one aspect, the present teachings relate to magnetic memory structure fabrication techniques in a high density configuration that includes an efficient means for programming high density magnetic memory structures.
    Type: Grant
    Filed: April 10, 2006
    Date of Patent: December 2, 2008
    Assignee: Micron Technology, Inc.
    Inventors: Allan T. Hurst, Jeffrey Sather, Jason B. Gadbois
  • Patent number: 7029926
    Abstract: The semiconductor industry seeks to replace traditional volatile memory devices with improved non-volatile memory devices. The increased demand for a significantly advanced, efficient, and non-volatile data retention technique has driven the development of integrated magnetic memory structures. In one aspect, the present teachings relate to magnetic memory structure fabrication techniques in a high density configuration that includes an efficient means for programming high density magnetic memory structures.
    Type: Grant
    Filed: November 18, 2004
    Date of Patent: April 18, 2006
    Assignee: Micron Technology, Inc.
    Inventors: Allan T. Hurst, Jeffrey Sather, Jason B. Gadbois
  • Patent number: 7020004
    Abstract: The semiconductor industry seeks to replace traditional volatile memory devices with improved non-volatile memory devices. The increased demand for a significantly advanced, efficient, and non-volatile data retention technique has driven the development of integrated magnetic memory structures. In one aspect, the present teachings relate to magnetic memory structure fabrication techniques in a high density configuration that includes an efficient means for programming high density magnetic memory structures.
    Type: Grant
    Filed: August 29, 2003
    Date of Patent: March 28, 2006
    Assignee: Micron Technology, Inc.
    Inventors: Allan T. Hurst, Jeffrey Sather, Jason B. Gadbois
  • Patent number: 6593150
    Abstract: Methods and systems are provided for depositing a magnetic film using one or more long throw magnetrons, and in some embodiments, an ion assist source and/or ion beam source. The long throw magnetrons are used to deposit particles at low energy and low pressure, which can be useful when, for example, depositing interfacial layers or the like. An ion assist source can be added to increase the energy of the particles provided by the long throw magnetrons, and/or modify or clean the layers on the surface of the substrate. An ion beam source can also be added to deposit layers at a higher energies and lower pressures to, for example, provide layers with increased crystallinity. By using a long throw magnetron, an ion assist source and/or an ion beam source, magnetic films can be advantageously provided.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: July 15, 2003
    Assignee: Honeywell International Inc.
    Inventors: Randy J. Ramberg, Allan T. Hurst, Mark J. Jenson
  • Publication number: 20030038023
    Abstract: Methods and systems are provided for depositing a magnetic film using one or more long throw magnetrons, and in some embodiments, an ion assist source and/or ion beam source. The long throw magnetrons are used to deposit particles at low energy and low pressure, which can be useful when, for example, depositing interfacial layers or the like. An ion assist source can be added to increase the energy of the particles provided by the long throw magnetrons, and/or modify or clean the layers on the surface of the substrate. An ion beam source can also be added to deposit layers at a higher energies and lower pressures to, for example, provide layers with increased crystallinity. By using a long throw magnetron, an ion assist source and/or an ion beam source, magnetic films can be advantageously provided.
    Type: Application
    Filed: September 30, 2002
    Publication date: February 27, 2003
    Inventors: Randy J. Ramberg, Allan T. Hurst, Mark L. Jenson
  • Patent number: 6269027
    Abstract: In one aspect of the present invention, a non-volatile latching element is provided that includes one or more magnetic elements therein. By programming the magnetic elements to appropriate resistance values, the latching element assumes a pre-programmed state upon power up. The magnetic elements are preferably programmed using either a one or two layer word line. In another aspect of the present invention, the magnetic elements are formed as pseudo-spin valve structures utilizing only CoFe as the active ferromagnetic layers, with one ferromagnetic layer thinner than the other. This simplifies the design while maintaining the high moment material to achieve large GMR ratios.
    Type: Grant
    Filed: April 14, 1998
    Date of Patent: July 31, 2001
    Assignee: Honeywell, Inc.
    Inventors: Allan T. Hurst, Jr., Jeff S. Sather, Jason B. Gadbois
  • Patent number: 6147922
    Abstract: In one aspect of the present invention, a non-volatile latching element is provided that includes one or more magnetic elements therein. By programming the magnetic elements to appropriate resistance values, the latching element assumes a pre-programmed state upon power up. The magnetic elements are preferably programmed using either a one or two layer word line. In another aspect of the present invention, the magnetic elements are formed as pseudo-spin valve structures utilizing only CoFe as the active ferromagnetic layers, with one ferromagnetic layer thinner than the other. This simplifies the design while maintaining the high moment material to achieve large GMR ratios.
    Type: Grant
    Filed: September 14, 1999
    Date of Patent: November 14, 2000
    Assignee: Honeywell, Inc.
    Inventors: Allan T. Hurst, Jr., Jeff S. Sather, Jason B. Gadbois
  • Patent number: 6048739
    Abstract: A high density magnetic memory device and method of manufacture therefor, wherein the magnetic bit region is provided after selected higher temperature processing steps are performed. Illustrative higher temperature processing steps include those that are performed above for example 400.degree. C., any may include contact and via plug processing. The present invention may allow, for example, contact and via plug processing to be used to form magnetic RAM devices. As indicated above, contact and/or via plug processing typically allows the size of the contacts and vias to be reduced, and the packing density of the resulting memory device to be increased.
    Type: Grant
    Filed: December 18, 1997
    Date of Patent: April 11, 2000
    Assignee: Honeywell Inc.
    Inventors: Allan T. Hurst, Jeffrey S. Sather, William F. Witcraft, Cheisan J. Yue
  • Patent number: 6027948
    Abstract: A method for performing an elevated temperature process on an integrated device whereby a magnetic field is used to maintain the alignment of magnetic domains in magnetically sensitive materials.
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: February 22, 2000
    Assignee: Honeywell International Inc.
    Inventors: Ronald J. Jensen, Richard K. Spielberger, Allan T. Hurst, Jeff Sather
  • Patent number: 5982658
    Abstract: A magnetoresistive memory array which has a row of active sense lines with each sense line including magnetoresistive bits and word lines extending over the bits. Each active sense line ending in a termination bit having a configuration selected to cause an adjacent bit to experience a magnetic field similar to that experienced by the remaining bits in the sense line. An inactive sense line located at each end of the row of active sense lines.
    Type: Grant
    Filed: October 31, 1997
    Date of Patent: November 9, 1999
    Assignee: Honeywell Inc.
    Inventors: Lonny L. Berg, Paul W. Cravens, Allan T. Hurst, Tangshiun Yeh
  • Patent number: 5956267
    Abstract: A word line structure, and method of manufacture therefor, for a monolithically formed magnetoresistive memory device having a magnetic field sensitive bit region. In a preferred embodiment, the word line structure includes a dielectric layer having an etched cavity formed therein, wherein the cavity has a bottom surface and two spaced side surfaces. A magnetic field keeper is provided adjacent to the back and/or side surfaces of the cavity. A conductive word line is also provided in the cavity and adjacent to the magnetic field keeper to at least substantially fill the cavity. A polishing step may be used to remove any portion of the magnetic field keeper and/or conductive word line that lie above the top surface of the dielectric layer to provide a planer top surface.
    Type: Grant
    Filed: December 18, 1997
    Date of Patent: September 21, 1999
    Assignee: Honeywell Inc
    Inventors: Allan T. Hurst, William Vavra
  • Patent number: 5939772
    Abstract: A package for shielding a circuit containing magnetically sensitive materials from external magnetic fields. A shield attached to a base of the package is connected by vias to a first conductive plane. A shield attached to a lid of the package is connected by vias to a second conductive plane. The first shield and the second shield are electrically interconnected. Conductive leads extend from the package and are connected internally to the circuit.
    Type: Grant
    Filed: October 31, 1997
    Date of Patent: August 17, 1999
    Assignee: Honeywell Inc.
    Inventors: Allan T. Hurst, Richard K. Spielberger
  • Patent number: 5756366
    Abstract: Magnetoresistive random access memory bit edges are magnetically hardened to prevent bit edge reversal.
    Type: Grant
    Filed: December 21, 1995
    Date of Patent: May 26, 1998
    Assignee: Honeywell Inc.
    Inventors: Lonny L. Berg, Allan T. Hurst, Jr., Tangshiun Yeh, Paul W. Cravens
  • Patent number: 5569617
    Abstract: In a magnetoresistive random access memory device, a spacer material is deposited at the edges of a memory bit to maintain magnetization at the edges in a direction along the edges.
    Type: Grant
    Filed: December 21, 1995
    Date of Patent: October 29, 1996
    Assignee: Honeywell Inc.
    Inventors: Tangshiun Yeh, Allan T. Hurst, Huang-Joung Chen, Lonny L. Berg, William F. Witcraft
  • Patent number: 5496759
    Abstract: A process for forming a magnetoresistive bit and an interconnection to an underlying component forms a pattern in an amorphous dielectric overlying the magnetic materials. Portions of the magnetic materials are removed to form a bit having a smooth bit edge profile by ion milling. The bit has a bit end located over the underlying component. A second amorphous dielectric layer is deposited and etched at the bit end to form a via at the underlying component. Conventional first metal is used to form the interconnection.
    Type: Grant
    Filed: December 29, 1994
    Date of Patent: March 5, 1996
    Assignee: Honeywell Inc.
    Inventors: Jerry Yue, Allan T. Hurst, Tangshiun Yeh, Huang-Joung Chen
  • Patent number: 5060193
    Abstract: A method for storing selected magnetic states in magnetic bit structures so as to assure establishment of the desired state therein. A first word line current, used for storing a magnetic state, is followed by providing a second word line current. The second line current assures establishment of the desired state in the magnetic bit structure by overcoming any pinning of a magnetic wall.
    Type: Grant
    Filed: April 4, 1990
    Date of Patent: October 22, 1991
    Assignee: Honeywell Inc.
    Inventors: James M. Daughton, Allan T. Hurst, Jr., Arthur V. Pohm
  • Patent number: 5012444
    Abstract: A method for sensing magnetic states of magnetic bit structures formed of separated double layer, magnetoresistive, ferromagnetic memory films through providing a word line current in a direction which results in a magnetic field due thereto, in the memory films of these bit structures, that is oriented in a direction opposite a common direction followed at least partially by orientations of edge magnetizations in these films that are parallel to the edges thereof, and sensing a change in electrical resistance of these bit structures as a result of that current.
    Type: Grant
    Filed: April 4, 1990
    Date of Patent: April 30, 1991
    Assignee: Honeywell Inc.
    Inventors: Allan T. Hurst, Jr., Arthur V. Pohm