Sarita Thakoor

age ~68

from Covina, CA

Also known as:
  • Santa Thakoor
Phone and address:
688 N Rimsdale Ave APT 32, Covina, CA 91722
6263405281

Sarita Thakoor Phones & Addresses

  • 688 N Rimsdale Ave APT 32, Covina, CA 91722 • 6263405281
  • 688 Rimsdale Ave, Covina, CA 91722 • 6263397085
  • Pasadena, CA
  • 688 N Rimsdale Ave APT 32, Covina, CA 91722 • 6263397085

Work

  • Position:
    Professional/Technical

Education

  • Degree:
    Graduate or professional degree

Us Patents

  • Thin Film Ferroelectric Electro-Optic Memory

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  • US Patent:
    52068293, Apr 27, 1993
  • Filed:
    Oct 24, 1990
  • Appl. No.:
    7/603935
  • Inventors:
    Sarita Thakoor - Pasadena CA
    Anilkumar P. Thakoor - Pasadena CA
  • International Classification:
    G11C 1142
  • US Classification:
    365117
  • Abstract:
    An electrically programmable, optically readable data or memory cell is configured from a thin film of ferroelectric material, such as PZT, sandwiched between a transparent top electrode and a bottom electrode. The output photoresponse, which may be a photocurrent or photo-emf, is a function of the product of the remanent polarization from a previously applied polarization voltage and the incident light intensity. The cell is useful for analog and digital data storage as well as opto-electric computing. The optical read operation is non-destructive of the remanent polarization. The cell provides a method for computing the product of stored data and incident optical data by applying an electrical signal to store data by polarizing the thin film ferroelectric material, and then applying an intensity modulated optical signal incident onto the thin film material to generate a photoresponse therein related to the product of the electrical and optical signals.
  • Deposition Of Thin Films Of Multicomponent Materials

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  • US Patent:
    51961016, Mar 23, 1993
  • Filed:
    Feb 5, 1991
  • Appl. No.:
    7/651329
  • Inventors:
    Sarita Thakoor - Pasadena CA
  • Assignee:
    Califoria Institute of Technology - Pasadena CA
  • International Classification:
    C23C 1434
  • US Classification:
    20419226
  • Abstract:
    Composite films of multicomponent materials, such as oxides and nitrides, e. g. , lead zirconate titanate, are deposited by dc magnetron sputtering, employing a rotating substrate holder, which rotates relative to a plurality of targets, one target for each metal element of the multicomponent material. The sputtering is carried out in a reactive atmosphere. The substrates on which the layers are deposited are at ambient temperature. Following deposition of the composite film, the film is heated to a temperature sufficient to initiate a solid state reaction and form the final product, which is substantially single phase and substantially homogeneous.
  • Enhanced Fatigue And Retention In Ferroelectric Thin Film Memory Capacitors By Post-Top Electrode Anneal Treatment

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  • US Patent:
    53728599, Dec 13, 1994
  • Filed:
    Oct 20, 1992
  • Appl. No.:
    7/963974
  • Inventors:
    Sarita Thakoor - Covina CA
  • Assignee:
    The United States of America as represented by the Administrator of the
    National Aeronautics and Space Administration - Washington DC
  • International Classification:
    B05D 306
    B05D 512
    B05D 302
  • US Classification:
    427551
  • Abstract:
    Thin film ferroelectric capacitors (10) comprising a ferroelectric film (18) sandwiched between electrodes (16 and 20) for nonvolatile memory operations are rendered more stable by subjecting the capacitors to an anneal following deposition of the top electrode (20). The anneal is done so as to form the interface (22) between the ferroelectric film and the top electrode. Heating in an air oven, laser annealing, or electron bombardment may be used to form the interface. Heating in an air oven is done at a temperature at least equal to the crystallization temperature of the ferroelectric film. Where the ferroelectric film comprises lead zirconate titanate, annealing is done at about 550. degree. to 600. degree. C. for about 10 to 15 minutes. The formation treatment reduces the magnitude of charge associated with the non-switching pulse in the thin film ferroelectric capacitors.
  • Ferroelectric Optical Computing Device With Low Optical Power Non-Destructive Read-Out

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  • US Patent:
    61081116, Aug 22, 2000
  • Filed:
    Feb 6, 1997
  • Appl. No.:
    8/795954
  • Inventors:
    Sarita Thakoor - Covina CA
    Anilkumar P. Thakoor - Covina CA
  • Assignee:
    California Institute of Technology - Pasadena CA
  • International Classification:
    G11C 1122
    H01G 706
  • US Classification:
    359107
  • Abstract:
    Photoresponse from a ferroelectric optical computing device, such as a memory cell or a logic switch, is increased by either illuminating the regions of the ferroelectric crystal under the electrode edges in a sandwich structure device or by aligning the principal axis of the ferroelectric crystal parallel to the linear polarization vector of the optical beam. Device density is increased by reducing the beam size using a small near-field optical fiber. Device evaluation including imprint failure susceptibility is performed by illuminating each ferroelectric optical computing device in a large array of such devices and storing the device address of any device whose response departs from a normal range.
  • Solid-State Non-Volatile Electronically Programmable Reversible Variable Resistance Device

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  • US Patent:
    48397008, Jun 13, 1989
  • Filed:
    Dec 16, 1987
  • Appl. No.:
    7/133897
  • Inventors:
    Sarita Thakoor - Pasadena CA
    Taher Daud - La Crescenta CA
    Aniklumar P. Thakoor - Pasadena CA
  • Assignee:
    California Institute of Technology - Pasadena CA
  • International Classification:
    H01L 4500
    H01L 2712
    H01L 4902
    H01L 2912
  • US Classification:
    357 2
  • Abstract:
    A solid-state variable resistance device (10) whose resistance can be repeatedly altered by a control signal over a wide range, and which will remain stable after the signal is removed, is formed on an insulated layer (14), supported on a substrate (12) and comprises a set of electrodes (16a, 16b) connected by a layer (18) of material, which changes from an insulator to a conductor upon the injection of ions, covered by a layer (22) of material with insulating properties which permit the passage of ions, overlaid by an ion donor material (20). The ion donor material is overlaid by an insulating layer (24) upon which is deposited a control gate (26) located above the contacts. In a preferred embodiment, the variable resistance material comprises WO. sub. 3, the ion donor layer comprises Cr. sub. 2 O. sub. 3, and the layers sandwiching the ion donor layer comprise silicon monoxide.
  • Method Of Producing High T.sub.c Superconducting Nbn Films

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  • US Patent:
    47268905, Feb 23, 1988
  • Filed:
    Aug 12, 1985
  • Appl. No.:
    6/764812
  • Inventors:
    Sarita Thakoor - Pasadena CA
    James L. Lamb - Los Angeles CA
    Anilkumar P. Thakoor - Pasadena CA
    Satish K. Khanna - Pasadena CA
  • Assignee:
    The United States of America as represented by the Administrator of the
    National Aeronautics and Space Administration - Washington DC
  • International Classification:
    C23C 1434
  • US Classification:
    20419224
  • Abstract:
    Thin films of niobium nitride with high superconducting temperature (T. sub. c) of 15. 7. degree. K. are deposited on substrates held at room temperature (. about. 90. degree. C. ) by heat sink throughout the sputtering process. Films deposited at P. sub. Ar >12. 9. +-. 2 mTorr exhibit higher T. sub. c with increasing P. sub. N2,I, with the highest T. sub. c achieved at P. sub. N2,I =3. 7. +-. 2 mTorr and total sputtering pressure P. sub. tot =16. 6. +-. 4. Further increase of N. sub. 2 injection starts decreasing T. sub. c.
  • Ferroelectric Optical Computing Device With Low Optical Power Non-Destructive Read-Out

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  • US Patent:
    59231823, Jul 13, 1999
  • Filed:
    May 23, 1996
  • Appl. No.:
    8/652841
  • Inventors:
    Sarita Thakoor - Covina CA
    Anilkumar P. Thakoor - Covina CA
  • Assignee:
    California Institute of Technology - Pasadena CA
  • International Classification:
    G11C 700
  • US Classification:
    324765
  • Abstract:
    Photoresponse from a ferroelectric optical computing device, such as a memory cell or a logic switch, is increased by either illuminating the regions of the ferroelectric crystal under the electrode edges in a sandwich structure device or by aligning the principal axis of the ferroelectric crystal parallel to the linear polarization vector of the optical beam. Device density is increased by reducing the beam size using a small near-field optical fiber. Device evaluation including imprint failure susceptibility is performed by illuminating each ferroelectric optical computing device in a large array of such devices and storing the device address of any device whose response departs from a normal range.
  • Ferroelectric Optical Computing Device With Low Optical Power Non-Destructive Read-Out

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  • US Patent:
    56215592, Apr 15, 1997
  • Filed:
    Apr 18, 1994
  • Appl. No.:
    8/228730
  • Inventors:
    Sarita Thakoor - Covina CA
    Anilkumar P. Thakoor - Covina CA
  • Assignee:
    California Institute of Technology - Pasadena CA
  • International Classification:
    G11C 1122
    H01G 706
  • US Classification:
    359107
  • Abstract:
    Photoresponse from a ferroelectric optical computing device, such as a memory cell or a logic switch, is increased by either illuminating the regions of the ferroelectric crystal under the electrode edges in a sandwich structure device or by aligning the principal axis of the ferroelectric crystal parallel to the linear polarization vector of the optical beam. Device density is increased by reducing the beam size using a small near-field optical fiber. Device evaluation including imprint failure susceptibility is performed by illuminating each ferroelectric optical computing device in a large array of such devices and storing the device address of any device whose response departs from a normal range.

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