Robert E Davidson

6704267, Mar 9, 2004

Mar 23, 2001

09/815785

Robert J. Davidson - Boise ID

Hewlett-Packard Development Company, L.P. - Houston TX

G11B 700

369101

Memory storage devices that employ atomic resolution storage technology are provided. A preferred memory storage device includes a storage medium that defines one or more coverage areas. Each of the coverage areas incorporates a storage area that is configurable in one of a plurality of structural states. Typically, the structural states represent information stored in the storage area. Electron beam emitters electrically communicate with the storage medium, with the storage medium and the emitters being configured to move relative to each other. So configured, each emitter is capable of providing a beam of electrons to a respective one of the coverage areas. The memory storage device also includes a first current source that selectively electrically communicates with at least one of the emitters. Additionally, a shield is provided that is configured to reduce an influence of a magnetic field so that a tendency of an electron emitted from one of the emitters to be displaced from an intended trajectory is reduced. Methods also are provided.

7057202, Jun 6, 2006

Sep 26, 2003

10/673003

Gary R. Ashton - Eagle ID, US
Robert J. Davidson - Boise ID, US

Hewlett-Packard Development Company, L.P. - Houston TX

H01L 47/02

257 4, 257 3, 257 5, 257 42, 257 44, 257613, 257614, 257 10, 257 11

An ultra-high density data storage device using phase-change diode memory cells, and having a plurality of emitters for directing beams of directed energy, a layer for forming multiple data storage cells and a layered diode structure for detecting a memory or data state of the storage cells, wherein the device comprises a phase-change data storage layer capable of changing states in response to the beams from the emitters, comprising a material containing copper, indium and selenium. A method of forming a diode structure for a phase-change data storage array, having multiple thin film layers adapted to form a plurality of data storage cell diodes, wherein the method comprises depositing a first diode layer of material on a substrate, and depositing a second diode layer of phase-change material on the first diode layer, the phase-change material containing copper, indium and selenium.

20020095680, Jul 18, 2002

Jan 12, 2001

09/760242

Robert Davidson - Boise ID, US

H04N007/173

725/087000

A personal movie storage module allows an individual to select and store a movie into the module for later retrieval and viewing. The module includes an atomic resolution memory device and a communication interface. The memory device is capable of storing one or more movies while the communication interface permits writing to and reading from the memory device. Using the module, an individual can capture a packet of entertainment media, such as a movie from a purchase center, such as a kiosk in an airport. The movie is retrieved from the module at the individual's convenience using a media player (e.g., DVD-type player, notebook computer, etc.). In one embodiment, the memory device includes an atomic resolution storage device, which is subminiature in size, allowing it to be contained within a small housing, has low power requirements, and provides for non-volatile storage of large amounts of data, including video.

20050185568, Aug 25, 2005

Feb 23, 2004

10/784622

Robert Davidson - Boise ID, US

G11B009/00

369126000

The present invention provides a storage device. The storage device comprises a field emitter, a storage medium having a storage area being in one of at least three states to represent information stored at the storage area, and a read circuit for sensing the state of the storage area and providing an output signal representative of the sensed status.

46814477, Jul 21, 1987

Aug 26, 1986

6/900266

Robert J. Davidson - Boise ID

Hewlett Packard Company - Palo Alto CA

G01B 902
G01B 1102

356351

Interferometer apparatus for determining the spatial relationship of two or more observed points such as the height of a magnetic transducer head as it moves over the surface of a spinning recording disc. A monochromatic light beam having components of characteristic polarization and frequency is separated with one component being directed upon the two observation points one of which may be on the transducer head and other may be on the spinning disc. The other component is simultaneously directed upon a reference surface. The reflected beams are then combined to produce an optical beat frequency which is subsequently detected electronically and converted to a voltage representative of the phase shift between images of the two points and utilized to provide the display of the distance between the two points.

51424258, Aug 25, 1992

Aug 9, 1990

7/564935

Samuel H. Gailbreath - Boise ID
Robert J. Davidson - Eagle ID

Hewlett-Packard Company - Palo Alto CA

G11B 517
G11B 3314
G11B 540
H05F 100

360123

A thin film magnetic data transducer which prevents capacitive coupling between the transducer and the disk of a disk drive system, has a magnetic circuit which is maintained at the same potential as the disk, usually ground potential. With the disk and the magnetic pole tips of the magnetic circuit at the same potential, capacitive charging and consequent current flow or arcing or discharge noise between the two are prevented. Noise from current due to the variable capacitive coupling of the coil to the disk during disk rotation is also eliminated. The thin film magnetic transducer is fabricated by depositing successive layers of an electrical insulating material, a magnetic material, insulating material, electrical conducting material for a planar coil, insulating material and magnetic material, in the order named on a substrate. The planar coil comprises spiral turns and the magnetic material layers are joined with each other within the spiral turns of the coil and encircle the coil, providing a magnetic gap between pole tips outside the of the coil. A thin film extension of the magnetic circuit is part of a circuit which connects the magnetic circuit to the frame of the disk drive as are the disks, which is usually ground potential.

59300620, Jul 27, 1999

Oct 3, 1996

8/725795

Robert J. Davidson - Boise ID

Hewlett-Packard Company - Palo Alto CA

G11B 502
G11B 539

360 66

A computer comprising a data storage device for use with a magnetic storage media, and a magnetoresistive transducer, including at least one magnetoresistive element, selectively reading digital data from the magnetic storage media; a first conductor connected to the magnetoresistive element and supplying current to the magnetoresistive element; a second conductor connected to the magnetoresistive element and transporting current from the magnetoresistive element; a control conductor parallel to the magnetoresistive element; and a magnetic feedback stabilization circuit holding the magnetoresistive transducer in a stable magnetic configuration during reading from the magnetic storage media.