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7593250 |
Ferroelectric nanostructure having switchable multi-stable vortex states
A ferroelectric nanostructure formed as a low dimensional nano-scale ferroelectric material having at least one vortex ring of polarization generating an ordered toroid moment switchable between...
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7525864 |
Memory data inversion architecture for minimizing power consumption
A method for conserving power in a device is disclosed. The method generally includes the steps of (A) storing a plurality of data items in a plurality of bit cells in the device such that a...
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7345907 |
Apparatus and method for reading an array of nonvolatile memory cells including switchable resistor memory elements
A non-volatile memory cell includes a switch able resistor memory element in series with a switch device. An array of such cells may be programmed using only positive voltages. A method for...
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6970356 |
Heat sink system
A heat sink assembly is provided to afford cooling for electronic components mounted on a circuit board. The assembly consists of a thermal conducting substrate base with a top and bottom side....
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6940801 |
Optical recording medium, optical recording and reproducing method and apparatus
An optical recording medium, an optical recording and reproducing method, and an apparatus that can record and reproduce multilevel information at a high density and with a high S/N ratio....
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6912148 |
Magnetic semiconductor memory and the reading method using spin-polarized electron beam
A system for writing data to and reading data from a magnetic semiconductor memory utilizing a spin polarized electron beam. The magnetic semiconductor memory comprises a plurality of storage...
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6900486 |
Ferroelectric memory and method for manufacturing same
Ferroelectric memory includes a hollow formed in a first insulation film. A lower electrode is formed in this hollow by sol-gel method including an application process due to a spin coat method. In...
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6867408 |
Erasable/rewritable optical data storage with photorefractive polymers
A method of erasable/rewritable optical data storage is provided in which a laser beam from a laser ( 10 ) operated in either a pulsed or continuous wave mode is focussed by an optical system (...
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6791857 |
Method and article for concentrating fields at sense layers
A write line structure for a magnetic memory cell includes a write conductor having a front surface facing the memory cell, a back surface and two sides surfaces. A cladding layer is disposed...
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6606261 |
Method for performing write and read operations in a passive matrix memory, and apparatus for performing the method
A method and apparatus for performing read and write operations in matrix-addressed memory array of memory cells is described. The memory cells comprising an electrically polarizable material...
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6304481 |
Method and apparatus for storing data using spin-polarized electrons
A data storage device including a substrate, a data storage layer on the substrate, and a spin-polarized electron source. The data storage layer comprises a fixed number of atomic layers of a...
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6274279 |
Preparations of bacteriorhodopsin variants having increased memory time, and their use
Compositions of bacteriorhodopsin variants with increased memory time and their use for reversible optical information recording are disclosed. The compositions are characterized in that the...
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6246602 |
Ferroelectric storage device
An object of the present invention is to provide a ferroelectric storage device which has long life in use. A switch-signal generating portion 40 automatically generates switch signals in...
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6141244 |
Multi level sensing of NAND memory cells by external bias current
A method and circuit for sensing multi states of a NAND memory cell by applying plurality of external sensing bias current at a constant positive gate and bias voltage and detecting a cell current...
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5946224 |
Ferroelectric memory device, a method for read out stored data and a method for standing-by
It is an object of the present invention to provide a ferroelectric memory device having a high integration and capable of maintaining nonvolatility. A threshold voltage V th of a ferroelectric...
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5940314 |
Ultra-high density memory device
A ultra-high density memory device utilizing a photoinductive ferromagnetic thin film. A photoinductive ferromagnetic thin film is formed on a GaAs substrate, and a tip is arranged so as to face...
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5854710 |
Optical fourier processing
The invention relates to systems and methods for optical Fourier processing and logic operations based on the discovery that the photoinduced anisotropy of photochromic materials such as...
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5838607 |
Spin polarized apparatus
Spin polarized apparatus includes a spin polarizing section of magnetic material with an electron input port and a polarized electron port and a transport section of magnetic material with a...
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5790418 |
Adaptive polarizing memory voltage time constant
At least two different time constants are used to produce the polarizing memory reference voltage which in turn is used in a protective relay for power transmission lines. For most conditions, a...
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5726964 |
Scanning head including a magneto-optical element and scanning device including the scanning head
Scanning head including a magneto-optical element and scanning device including the scanning head. A scanning head having a head face (1) comprises flux-guiding elements (3a, 3b) and a...
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5604706 |
Data storage medium for storing data as a polarization of a data magnetic field and method and apparatus using spin-polarized electrons for storing the data onto the data storage medium and reading the stored data therefrom
A data storage medium comprising a substrate and a data storage layer formed on the substrate. The data storage layer comprises a fixed number of atomic layers of a magnetic material which provide...
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5581499 |
Micro information storage system
A device for optically storing and retrieving information incorporating a cadmium fluoride crystal. Using focused ionizing radiation, patterns can be formed in the crystal by the creation of color...
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5568460 |
Optical recording and/or reproducing apparatus and method utilizing stimulated photon echo
The recording method and apparatus according to this invention is an "optical recording method utilizing a simulated photon echo" in which information is recorded by irradiating data and record...
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5384221 |
Birefringent azo dye polymer erasable optical storage medium
An optical storage medium including a transparent polymer and an isomerizable AZO dye, the optical storage medium being coated as a water miscible solution on a substrate so as to form a film...
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5325324 |
Three-dimensional optical memory
Selected domains, normally 10 3 ×10 3 such domains arrayed in a plane, within a three-dimensional (3-D) volume of active medium, typically 1 cm 3 of spirobenzopyran containing 10 2 such...
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5316900 |
Optical recording medium having a constant birefringent property and an alterable photochromic property
A recording medium comprises a recording layer, a birefringent layer, and a reflecting layer. The recording layer is formed of a material whose optical rotatory power is alterable such that in one...
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5311474 |
Random access optical storage
This application concerns an optical storage with an optical storage medium having a plurality of storage fields arranged in matrix fashion, wherein each storage field of this storage field matrix...
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5239504 |
Magnetostrictive/electrostrictive thin film memory
A data storage system is described which includes a magnetostrictive, anisotropic, ferromagnetic film whose domains exhibit a preferred orientation and are initially poled in one direction along...
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4977540 |
Spin glass type associative processor system
An associative data processor including a spin glass type amorphous magnetic film has input areas, output areas, and "hidden" or associative areas. A coil provides selective magnetic biasing, and...
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4953124 |
Opto-magnetic signal reproducing apparatus for reading, by differential detection using a magneto-optical effect, information magnetically recorded on a record medium
An opto-magnetic signal reproducing apparatus includes a light source unit for applying a linearly polarized light beam to a recording medium having magnetically recorded information, a splitter...
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4945514 |
Method of bistable optical information storage using antiferroelectric phase PLZT ceramics
A method for bistable storage of binary optical information includes an antiferroelectric (AFE) lead lanthanum zirconate titanate (PLZT) layer having a stable antiferroelectric first phase and a...
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4864537 |
Polymers and dye combinations and methods for their use in optical recording
A polymer and dye combination suitable for use in optically recording information. The present invention includes a material which may exhibit the property of birefringence under selected...
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4789965 |
Methods and compositions for recording optical information employing molecular pseudorotation
Methods and compositions for use in optically recording information. The present invention includes incorporating solute molecules within an extremely viscous medium. The solute molecules may be...
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4731754 |
Erasable optical memory material from a ferroelectric polymer
An electro-optic memory effect providing for storing, erasing and rewriting igital information relies upon a ferroelectric polymer, polyvinylidene fluoride. Recent development of tri-fluoroethylene...
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4672594 |
Magneto-optical recording system utilizing a leakage magnetic field of focusing actuator
In a magneto-optical file memory wherein a storage medium having a vertical magnetic film is irradiated with a laser beam to reverse a magnetization direction of the magnetic film, thereby to write...
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4654837 |
Magneto-optic transducer with enhanced signal performance
A magneto-optic transducer for providing an optical indication of variations in magnetization in a magnetic storage medium located along a predetermined path. The transducer has a thin film of...
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4551819 |
Optical recording method and apparatus utilizing polymeric birefringent materials
An optical recording media as well as methods and apparatus for reading and writing on the novel media are provided. The novel media has the property of birefringence, and information is stored...
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4449204 |
Information processing apparatus using a semiconductor laser diode
An optical information processing apparatus comprises an information recording medium, a semiconductor laser diode for issuing a laser beam and an optical system adapted to direct the issued laser...
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4424580 |
Method and apparatus for generating electron spin reversal in ferrimagnetic material
Methods and apparatus for reversibly altering magnetic characteristics or domains of ferrimagnetic material by photomagnetic means, particularly by electron spin reversal (spin-flip). Photomagnetic...
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4296479 |
Method for optical recording in photo-dichroic glass surfaces
The instant invention is directed to a method for writing and erasing images in the surface of a photosensitive glass which demonstrates photoanisotropic behavior at a mega Hz or higher rate. This...
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4167024 |
System for recording or reproduction of signals by means of polarized light beams
Information is converted from electrical-signal form to recorded form, or from recorded form to electrical-signal form. A beam of light emitted by a light source is split into two component light...
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4158433 |
Method of and apparatus for securing and storing personal information
Secured computerized credit cards of the ferromagnetic storage variety, and a computer system that makes use of such cards at more than one location. The card comprises a plurality of ferromagnetic...
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4079429 |
Optical detector for magnetic fields employing feedback circuitry
An optical detector for magnetic fields detects rotations in the polarization of a beam of polarized light caused by the magnetic fields. A modulator responsive to a fixed frequency signal...
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4005275 |
Wideband analog photorecording apparatus and method
A wideband analog photorecorder comprises a transparent Bragg cell as an acousto-optic transducer and a pulsed laser positioned to sequentially illuminate a moving recording medium (photographic...
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3998523 |
Electro-optic ceramic material
An electro-optic ceramic material useful for electro-optic applications comprising an anti-ferroelectric phase (or para-electric phase) and a ferroelectric phase, the two phases of which coexist...
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3990770 |
Electro-optic picture display and memory device
An electro-optic picture display and memory device employs a material which has the property of field-induced ferroelectricity such as lanthanum-containing mixed crystals of lead zirconate and lead...
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RE28971 |
Light modulator element
A device for modulating and a nondestructive readout storage device employing modulation of light transmitted through an irregular ferroelectric crystal before and after the rotation of the...
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3945715 |
Electro-optical birefringence device employing edge effect
An electro-optical transducer and data storage device is operated by electrically establishing different electric field levels in a retentive ferroelectric PLZT crystal. The crystal may have a...
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3934234 |
Photodichroic readout device using circularly polarized light
A unique photodichroic readout device composed of photodichroic material u which is passed a circularly polarized light beam that is horizontally or vertically polarized dependent upon the storage...
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3902788 |
Optical memory system for reading, writing and erasing information
A planar erasable memory material including a sandwich of a ferroelectric element and a photoconductor is addressed by a laser beam emitted from a single two dimensionally scannable electron beam...
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