Patents by Inventor Chitra Subramanian

Chitra Subramanian 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: 10388578
    Abstract: A chip intermediate body includes a semiconductor region including plural chip areas. The chip areas respectively are cut out as semiconductor chips. A cut region is provided along edges of the chip areas, the cut region being cut to cut out the semiconductor chips. A contact region is provided opposite to the chip areas across the cut region, the contact region being configured to be contacted by a probe of a test unit to test the chip areas, and electric wiring is provided continuously with the cut region to connect the chip areas and the contact region.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: August 20, 2019
    Assignee: International Business Machines Corporation
    Inventors: Akihiro Horibe, Yasuteru Kohda, Seiji Munetoh, Chitra Subramanian, Kuniaki Sueoka
  • Publication number: 20190156878
    Abstract: A memory device is configured to identify a set of bit cells to be changed from a first state to a second state. In some examples, the memory device may apply a first voltage to the set of bit cells to change a least a first portion of the set of bit cells to the second state. In some cases, the memory device may also identify a second portion of the bit cells that remained in the first state following the application of the first voltage. In these cases, the memory device may apply a second voltage having a greater magnitude, duration, or both to the second portion of the set of bit cells in order to set the second portion of bit cells to the second state.
    Type: Application
    Filed: December 12, 2018
    Publication date: May 23, 2019
    Applicant: EVERSPIN TECHNOLOGIES, INC.
    Inventors: Thomas ANDRE, Dimitri HOUSSAMEDDINE, Syed M. ALAM, Jon SLAUGHTER, Chitra SUBRAMANIAN
  • Publication number: 20190139840
    Abstract: A chip intermediate body includes a semiconductor region including plural chip areas. The chip areas respectively are cut out as semiconductor chips. A cut region is provided along edges of the chip areas, the cut region being cut to cut out the semiconductor chips. A contact region is provided opposite to the chip areas across the cut region, the contact region being configured to be contacted by a probe of a test unit to test the chip areas, and electric wiring is provided continuously with the cut region to connect the chip areas and the contact region.
    Type: Application
    Filed: December 28, 2018
    Publication date: May 9, 2019
    Inventors: Akihiro Horibe, Yasuteru Kohda, Seiji Munetoh, Chitra Subramanian, Kuniaki Sueoka
  • Patent number: 10268591
    Abstract: A memory having a delayed write-back to the array of data corresponding to a previously opened page allows delays associated with write-back operations to be avoided. After an initial activation opens a first page and the read/write operations for that page are complete, write-back of the open page to the array of memory cells is delayed until after completion of a subsequent activate operation that opens a new page. Techniques to force a write-back in the absence of another activate operation are also disclosed.
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: April 23, 2019
    Assignee: Everspin Technologies Inc.
    Inventors: Thomas Andre, Syed M. Alam, Chitra Subramanian, Javed S. Barkatullah
  • Patent number: 10269405
    Abstract: A memory device is configured to identify a set of bit cells to be changed from a first state to a second state. In some examples, the memory device may apply a first voltage to the set of bit cells to change a least a first portion of the set of bit cells to the second state. In some cases, the memory device may also identify a second portion of the bit cells that remained in the first state following the application of the first voltage. In these cases, the memory device may apply a second voltage having a greater magnitude, duration, or both to the second portion of the set of bit cells in order to set the second portion of bit cells to the second state.
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: April 23, 2019
    Assignee: Everspin Technologies, Inc.
    Inventors: Thomas Andre, Dimitri Houssameddine, Syed M. Alam, Jon Slaughter, Chitra Subramanian
  • Publication number: 20190103327
    Abstract: A chip intermediate body includes a semiconductor region including plural chip areas. The chip areas respectively are cut out as semiconductor chips. A cut region is provided along edges of the chip areas, the cut region being cut to cut out the semiconductor chips. A contact region is provided opposite to the chip areas across the cut region, the contact region being configured to be contacted by a probe of a test unit to test the chip areas, and electric wiring is provided continuously with the cut region to connect the chip areas and the contact region.
    Type: Application
    Filed: October 2, 2017
    Publication date: April 4, 2019
    Inventors: Akihiro Horibe, Yasuteru Kohda, Seiji Munetoh, Chitra Subramanian, Kuniaki Sueoka
  • Publication number: 20190103328
    Abstract: A chip intermediate body includes a semiconductor region including plural chip areas. The chip areas respectively are cut out as semiconductor chips. A cut region is provided along edges of the chip areas, the cut region being cut to cut out the semiconductor chips. A contact region is provided opposite to the chip areas across the cut region, the contact region being configured to be contacted by a probe of a test unit to test the chip areas, and electric wiring is provided continuously with the cut region to connect the chip areas and the contact region.
    Type: Application
    Filed: October 27, 2017
    Publication date: April 4, 2019
    Inventors: Akihiro Horibe, Yasuteru Kohda, Seiji Munetoh, Chitra Subramanian, Kuniaki Sueoka
  • Patent number: 10220046
    Abstract: Provided herein are compositions and methods for the treatment of diseases, such as hyperproliferative diseases, employing compounds formulated for pharmaceutical and research use via nanoparticles.
    Type: Grant
    Filed: July 14, 2015
    Date of Patent: March 5, 2019
    Assignee: THE REGENTS OF THE UNIVERSITY OF MICHIGAN
    Inventors: Anna Schwendeman, Mark Cohen, Chitra Subramanian, Rui Kuai, Dan Li, Peter White, James Moon
  • Publication number: 20180342276
    Abstract: Precharging circuits and techniques are presented for use with magnetic memory devices in order to speed up access to the memory cells for reading and writing. Including precharging in the sense amplifiers used to access the memory cells enables self-referenced read operations to be completed more quickly than is possible without precharging. Similarly, precharging can also be used in conjunction with write-back operations in order to allow the data state stored by magnetic tunnel junctions included in the memory cells to be changed more rapidly.
    Type: Application
    Filed: June 5, 2018
    Publication date: November 29, 2018
    Applicant: EVERSPIN TECHNOLOGIES, INC.
    Inventors: Syed M. Alam, Chitra Subramanian
  • Publication number: 20180267899
    Abstract: A memory having a delayed write-back to the array of data corresponding to a previously opened page allows delays associated with write-back operations to be avoided. After an initial activation opens a first page and the read/write operations for that page are complete, write-back of the open page to the array of memory cells is delayed until after completion of a subsequent activate operation that opens a new page. Techniques to force a write-back in the absence of another activate operation are also disclosed.
    Type: Application
    Filed: May 22, 2018
    Publication date: September 20, 2018
    Applicant: Everspin Technologies, Inc.
    Inventors: Thomas Andre, Syed M. Alam, Chitra Subramanian, Javed S. Barkatullah
  • Patent number: 9990300
    Abstract: A memory having a delayed write-back to the array of data corresponding to a previously opened page allows delays associated with write-back operations to be avoided. After an initial activation opens a first page and the read/write operations for that page are complete, write-back of the open page to the array of memory cells is delayed until after completion of a subsequent activate operation that opens a new page. Techniques to force a write-back in the absence of another activate operation are also disclosed.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: June 5, 2018
    Assignee: EVERSPIN TECHNOLOGIES, INC.
    Inventors: Thomas Andre, Syed M. Alam, Chitra Subramanian, Javed S. Barkatullah
  • Patent number: 9972373
    Abstract: An apparatus used in a self-referenced read of a memory bit cell includes circuitry including a plurality of transistors that includes an NMOS-follower transistor for applying a read voltage to a first end of the bit cell. An offset current is applied by an offset current transistor. A transmission gate allows for isolation of a capacitor used to store a sample voltage corresponding to the read voltage applied across the memory bit cell.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: May 15, 2018
    Assignee: EVERSPIN TECHNOLOGIES, INC.
    Inventors: Thomas Andre, Syed M. Alam, Chitra Subramanian
  • Publication number: 20170315920
    Abstract: A memory having a delayed write-back to the array of data corresponding to a previously opened page allows delays associated with write-back operations to be avoided. After an initial activation opens a first page and the read/write operations for that page are complete, write-back of the open page to the array of memory cells is delayed until after completion of a subsequent activate operation that opens a new page. Techniques to force a write-back in the absence of another activate operation are also disclosed.
    Type: Application
    Filed: April 28, 2016
    Publication date: November 2, 2017
    Inventors: Thomas Andre, Syed M. Alam, Chitra Subramanian, Javed S. Barkatullah
  • Publication number: 20170301384
    Abstract: An apparatus used in a self-referenced read of a memory bit cell includes circuitry including a plurality of transistors that includes an NMOS-follower transistor for applying a read voltage to a first end of the bit cell. An offset current is applied by an offset current transistor. A transmission gate allows for isolation of a capacitor used to store a sample voltage corresponding to the read voltage applied across the memory bit cell.
    Type: Application
    Filed: June 29, 2017
    Publication date: October 19, 2017
    Applicant: Everspin Technologies, Inc.
    Inventors: Thomas ANDRE, Syed M. ALAM, Chitra SUBRAMANIAN
  • Publication number: 20170263300
    Abstract: A memory device is configured to identify a set of bit cells to be changed from a first state to a second state. In some examples, the memory device may apply a first voltage to the set of bit cells to change a least a first portion of the set of bit cells to the second state. In some cases, the memory device may also identify a second portion of the bit cells that remained in the first state following the application of the first voltage. In these cases, the memory device may apply a second voltage having a greater magnitude, duration, or both to the second portion of the set of bit cells in order to set the second portion of bit cells to the second state.
    Type: Application
    Filed: May 25, 2017
    Publication date: September 14, 2017
    Applicant: EVERSPIN TECHNOLOGIES, INC.
    Inventors: Thomas ANDRE, Dimitri HOUSSAMEDDINE, Syed M. ALAM, Jon SLAUGHTER, Chitra SUBRAMANIAN
  • Patent number: 9697880
    Abstract: Self-referenced reading of a memory cell in a memory includes first applying a read voltage across the memory cell to produce a sample voltage. After applying the read voltage, a write current is applied to the memory cell to write a first state to the memory cell. After applying the write current, the read voltage is reapplied across the memory cell. An offset current is also applied while the read voltage is reapplied, and the resulting evaluation voltage from reapplying the read voltage with the offset current is compared with the sample voltage to determine the state of the memory cell.
    Type: Grant
    Filed: June 25, 2016
    Date of Patent: July 4, 2017
    Assignee: Everspin Technologies, Inc.
    Inventors: Thomas Andre, Syed M. Alam, Chitra Subramanian
  • Patent number: 9679627
    Abstract: A memory device is configured to identify a set of bit cells to be changed from a first state to a second state. In some examples, the memory device may apply a first voltage to the set of bit cells to change a least a first portion of the set of bit cells to the second state. In some cases, the memory device may also identify a second portion of the bit cells that remained in the first state following the application of the first voltage. In these cases, the memory device may apply a second voltage having a greater magnitude, duration, or both to the second portion of the set of bit cells in order to set the second portion of bit cells to the second state.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: June 13, 2017
    Assignee: Everspin Technologies, Inc.
    Inventors: Thomas Andre, Dimitri Houssameddine, Syed M. Alam, Jon Slaughter, Chitra Subramanian
  • Publication number: 20170157149
    Abstract: Provided herein are compositions and methods for the treatment of diseases, such as hyperproliferative diseases, employing compounds formulated for pharmaceutical and research use via nanoparticles.
    Type: Application
    Filed: July 14, 2015
    Publication date: June 8, 2017
    Inventors: Anna SCHWENDEMAN, Mark COHEN, Chitra SUBRAMANIAN, Rui KUAI, Dan LI, Peter WHITE, James MOON
  • Patent number: 9502093
    Abstract: A spin-torque magnetoresistive memory includes array read circuits and array write circuits coupled to an array of magnetic bits. The array read circuits sample magnetic bits in the array, apply a write current pulse to the magnetic bits to set them to a first logic state, resample the magnetic bits using an additional offset current, and compare the results of sampling and resampling to determine the bit state for each magnetic bit. For each of the magnetic bits in the page having the second logic state, the array write circuits initiate a write-back, wherein the write-back includes applying a second write current pulse having opposite polarity in comparison with the first write current pulse to set the magnetic bit to the second state. A read or write operation may be received after initiation of the write-back where the write-back can be aborted for a portion of the bits in the case of a write operation.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: November 22, 2016
    Assignee: Everspin Technologies, Inc.
    Inventors: Syed M. Alam, Thomas Andre, Matthew R. Croft, Chitra Subramanian, Halbert Lin
  • Publication number: 20160307615
    Abstract: Self-referenced reading of a memory cell in a memory includes first applying a read voltage across the memory cell to produce a sample voltage. After applying the read voltage, a write current is applied to the memory cell to write a first state to the memory cell. After applying the write current, the read voltage is reapplied across the memory cell. An offset current is also applied while the read voltage is reapplied, and the resulting evaluation voltage from reapplying the read voltage with the offset current is compared with the sample voltage to determine the state of the memory cell.
    Type: Application
    Filed: June 25, 2016
    Publication date: October 20, 2016
    Inventors: Thomas Andre, Syed M. Alam, Chitra Subramanian