Patents by Inventor Mehrdad Mofidi

Mehrdad Mofidi 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: 11923341
    Abstract: An electronic device with embedded access to a high-bandwidth, high-capacity fast-access memory includes (a) a memory circuit fabricated on a first semiconductor die, wherein the memory circuit includes numerous modular memory units, each modular memory unit having (i) a three-dimensional array of storage transistors, and (ii) a group of conductors exposed to a surface of the first semiconductor die, the group of conductors being configured for communicating control, address and data signals associated the memory unit; and (b) a logic circuit fabricated on a second semiconductor die, wherein the logic circuit also includes conductors each exposed at a surface of the second semiconductor die, wherein the first and second semiconductor dies are wafer-bonded, such that the conductors exposed at the surface of the first semiconductor die are each electrically connected to a corresponding one of the conductors exposed to the surface of the second semiconductor die.
    Type: Grant
    Filed: September 3, 2021
    Date of Patent: March 5, 2024
    Assignee: SUNRISE MEMORY CORPORATION
    Inventors: Khandker Nazrul Quader, Robert Norman, Frank Sai-keung Lee, Christopher J. Petti, Scott Brad Herner, Siu Lung Chan, Sayeef Salahuddin, Mehrdad Mofidi, Eli Harari
  • Publication number: 20230260969
    Abstract: An electronic device with embedded access to a high-bandwidth, high-capacity fast-access memory includes (a) a memory circuit fabricated on a first semiconductor die, wherein the memory circuit includes numerous modular memory units, each modular memory unit having (i) a three-dimensional array of storage transistors, and (ii) a group of conductors exposed to a surface of the first semiconductor die, the group of conductors being configured for communicating control, address and data signals associated the memory unit; and (b) a logic circuit fabricated on a second semiconductor die, wherein the logic circuit also includes conductors each exposed at a surface of the second semiconductor die, wherein the first and second semiconductor dies are wafer-bonded, such that the conductors exposed at the surface of the first semiconductor die are each electrically connected to a corresponding one of the conductors exposed to the surface of the second semiconductor die.
    Type: Application
    Filed: April 24, 2023
    Publication date: August 17, 2023
    Inventors: Khandker Nazrul Quader, Robert Norman, Frank Sai-keung Lee, Christopher J. Petti, Scott Brad Herner, Siu Lung Chan, Sayeef Salahuddin, Mehrdad Mofidi, Eli Harari
  • Patent number: 11670620
    Abstract: An electronic device with embedded access to a high-bandwidth, high-capacity fast-access memory includes (a) a memory circuit fabricated on a first semiconductor die, wherein the memory circuit includes numerous modular memory units, each modular memory unit having (i) a three-dimensional array of storage transistors, and (ii) a group of conductors exposed to a surface of the first semiconductor die, the group of conductors being configured for communicating control, address and data signals associated the memory unit; and (b) a logic circuit fabricated on a second semiconductor die, wherein the logic circuit also includes conductors each exposed at a surface of the second semiconductor die, wherein the first and second semiconductor dies are wafer-bonded, such that the conductors exposed at the surface of the first semiconductor die are each electrically connected to a corresponding one of the conductors exposed to the surface of the second semiconductor die.
    Type: Grant
    Filed: January 29, 2020
    Date of Patent: June 6, 2023
    Assignee: SUNRISE MEMORY CORPORATION
    Inventors: Khandker Nazrul Quader, Robert Norman, Frank Sai-keung Lee, Christopher J. Petti, Scott Brad Herner, Siu Lung Chan, Sayeef Salahuddin, Mehrdad Mofidi, Eli Harari
  • Publication number: 20230131169
    Abstract: A high-capacity system memory may be built from both quasi-volatile (QV) memory circuits, logic circuits, and static random-access memory (SRAM) circuits. Using the SRAM circuits as buffers or cache for the QV memory circuits, the system memory may achieve access latency performance of the SRAM circuits and may be used as code memory. The system memory is also capable of direct memory access (DMA) operations and includes an arithmetic logic unit for performing computational memory tasks. The system memory may include one or more embedded processor. In addition, the system memory may be configured for multi-channel memory accesses by multiple host processors over multiple host ports. The system memory may be provided in the dual-in-line memory module (DIMM) format.
    Type: Application
    Filed: December 22, 2022
    Publication date: April 27, 2023
    Inventors: Robert D. Norman, Eli Harari, Khandker Nazrul Quader, Frank Sai-keung Lee, Richard S. Chernicoff, Youn Cheul Kim, Mehrdad Mofidi
  • Patent number: 11580038
    Abstract: A high-capacity system memory may be built from both quasi-volatile (QV) memory circuits, logic circuits, and static random-access memory (SRAM) circuits. Using the SRAM circuits as buffers or cache for the QV memory circuits, the system memory may achieve access latency performance of the SRAM circuits and may be used as code memory. The system memory is also capable of direct memory access (DMA) operations and includes an arithmetic logic unit for performing computational memory tasks. The system memory may include one or more embedded processor. In addition, the system memory may be configured for multi-channel memory accesses by multiple host processors over multiple host ports. The system memory may be provided in the dual-in-line memory module (DIMM) format.
    Type: Grant
    Filed: February 5, 2021
    Date of Patent: February 14, 2023
    Assignee: SUNRISE MEMORY CORPORATION
    Inventors: Robert D. Norman, Eli Harari, Khandker Nazrul Quader, Frank Sai-keung Lee, Richard S. Chernicoff, Youn Cheul Kim, Mehrdad Mofidi
  • Publication number: 20210398949
    Abstract: An electronic device with embedded access to a high-bandwidth, high-capacity fast-access memory includes (a) a memory circuit fabricated on a first semiconductor die, wherein the memory circuit includes numerous modular memory units, each modular memory unit having (i) a three-dimensional array of storage transistors, and (ii) a group of conductors exposed to a surface of the first semiconductor die, the group of conductors being configured for communicating control, address and data signals associated the memory unit; and (b) a logic circuit fabricated on a second semiconductor die, wherein the logic circuit also includes conductors each exposed at a surface of the second semiconductor die, wherein the first and second semiconductor dies are wafer-bonded, such that the conductors exposed at the surface of the first semiconductor die are each electrically connected to a corresponding one of the conductors exposed to the surface of the second semiconductor die.
    Type: Application
    Filed: September 3, 2021
    Publication date: December 23, 2021
    Inventors: Khandker Nazrul Quader, Robert Norman, Frank Sai-keung Lee, Christopher J. Petti, Scott Brad Herner, Siu Lung Chan, Sayeef Salahuddin, Mehrdad Mofidi, Eli Harari
  • Publication number: 20210248094
    Abstract: A high-capacity system memory may be built from both quasi-volatile (QV) memory circuits, logic circuits, and static random-access memory (SRAM) circuits. Using the SRAM circuits as buffers or cache for the QV memory circuits, the system memory may achieve access latency performance of the SRAM circuits and may be used as code memory. The system memory is also capable of direct memory access (DMA) operations and includes an arithmetic logic unit for performing computational memory tasks. The system memory may include one or more embedded processor. In addition, the system memory may be configured for multi-channel memory accesses by multiple host processors over multiple host ports. The system memory may be provided in the dual-in-line memory module (DIMM) format.
    Type: Application
    Filed: February 5, 2021
    Publication date: August 12, 2021
    Inventors: Robert D. Norman, Eli Harari, Khandker Nazrul Quader, Frank Sai-keung Lee, Richard S. Chernicoff, Youn Cheul Kim, Mehrdad Mofidi
  • Publication number: 20200243486
    Abstract: An electronic device with embedded access to a high-bandwidth, high-capacity fast-access memory includes (a) a memory circuit fabricated on a first semiconductor die, wherein the memory circuit includes numerous modular memory units, each modular memory unit having (i) a three-dimensional array of storage transistors, and (ii) a group of conductors exposed to a surface of the first semiconductor die, the group of conductors being configured for communicating control, address and data signals associated the memory unit; and (b) a logic circuit fabricated on a second semiconductor die, wherein the logic circuit also includes conductors each exposed at a surface of the second semiconductor die, wherein the first and second semiconductor dies are wafer-bonded, such that the conductors exposed at the surface of the first semiconductor die are each electrically connected to a corresponding one of the conductors exposed to the surface of the second semiconductor die.
    Type: Application
    Filed: January 29, 2020
    Publication date: July 30, 2020
    Applicant: Sunrise Memory Corporation
    Inventors: Khandker Nazrul Quader, Robert Norman, Frank Sai-keung Lee, Christopher J. Petti, Scott Brad Herner, Siu Lung Chan, Sayeef Salahuddin, Mehrdad Mofidi, Eli Harari
  • Publication number: 20120167100
    Abstract: An external controller has greater control over control circuitry on a memory die in a non-volatile storage system. The external controller can issue a manual suspend command on a communication path which is constantly monitored by the control circuitry. In response, the control circuitry suspends a task immediately, with essentially no delay, or at a next acceptable point in the task. The external controller similarly has the ability to issue a manual resume command, which can be provided on the communication path when that path has a ready status. The control circuitry can also automatically suspend and resume a task. The external controller can cause a task to be suspended by issuing an illegal read command. The external controller can cause a suspended program task to be aborted by issuing a new program command.
    Type: Application
    Filed: December 23, 2010
    Publication date: June 28, 2012
    Inventors: Yan Li, Alon Marcu, Cynthia Hsu, Grishma Shah, Cuong Trinh, Mehrdad Mofidi
  • Patent number: 7890694
    Abstract: An EEPROM system includes flash EEPROM cells organized into subarrays. Pairs of subarrays share row address decoders by sharing word lines, and individual subarrays have dedicated column address decoders and data registers. Each row decoder has an associated row address latch, and each column decoder has an associated column address latch. Multiple data chunks are concurrently written into the subarrays by first latching chunk addresses into the row and column address latches, and corresponding chunks of data into the data registers, then activating a programming signal to initiate concurrent programming and verifying the programming of the data chunks.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: February 15, 2011
    Assignee: SanDisk Corporation
    Inventors: Douglas J. Lee, Mehrdad Mofidi, Sanjay Mehrotra, Raul-Adrian Cernea
  • Publication number: 20090228644
    Abstract: An EEPROM system includes flash EEPROM cells organized into subarrays. Pairs of subarrays share row address decoders by sharing word lines, and individual subarrays have dedicated column address decoders and data registers. Each row decoder has an associated row address latch, and each column decoder has an associated column address latch. Multiple data chunks are concurrently written into the subarrays by first latching chunk addresses into the row and column address latches, and corresponding chunks of data into the data registers, then activating a programming signal to initiate concurrent programming and verifying the programming of the data chunks.
    Type: Application
    Filed: May 20, 2009
    Publication date: September 10, 2009
    Inventors: Douglas J. Lee, Mehrdad Mofidi, Sanjay Mehrotra, Raul-Adrian Cernea
  • Patent number: 7532514
    Abstract: When programming a contiguous page of memory storage units, every time a memory storage unit has reached its targeted state and is program-inhibited or locked out from further programming, it creates a perturbation on an adjacent memory storage unit still under programming. The present invention provides as part of a programming circuit and method in which an offset to the perturbation is added to the adjacent memory storage unit still under programming. The offset is added by a controlled coupling between the adjacent bit lines of the program-inhibited memory storage unit and the still under programming memory storage unit. In this way, an error inherent in programming in parallel high-density memory storage units is eliminated or minimized.
    Type: Grant
    Filed: August 31, 2007
    Date of Patent: May 12, 2009
    Assignee: Sandisk Corporation
    Inventors: Raul-Adrian Cernea, Yan Li, Mehrdad Mofidi, Shahzad Khalid
  • Patent number: 7447093
    Abstract: Method for controlling voltage in a non-volatile memory system is provided. The method includes selecting a first input value for a voltage generator system operating in one of a plurality of modes, the first input value controlling a temperature dependent component of a voltage applied to a memory cell; and selecting a second input value for the voltage generator system operating in one of the plurality of modes, the second input value controlling a temperature independent component of the voltage applied to the memory cell. The temperature dependent component of the voltage applied to the memory cell and the temperature independent component of the voltage applied to the memory cell are controlled independently in response to the first input value and the second input value.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: November 4, 2008
    Assignee: SanDisk Corporation
    Inventors: Jun Li, Prajit Nandi, Mehrdad Mofidi
  • Patent number: 7403434
    Abstract: System for a non-volatile memory system is provided. The non-volatile memory system includes a voltage generator system operating in one of a plurality of modes for generating a voltage applied to a memory cell of the non-volatile memory system. For one of the plurality of modes, a first input value is selected for controlling a temperature dependent component of the voltage and a second input value is selected for controlling a temperature independent component of the voltage. The temperature dependent component of the voltage and the temperature independent component of the voltage are controlled independently in response to the first input value and the second input value.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: July 22, 2008
    Assignee: SanDisk Corporation
    Inventors: Jun Li, Prajit Nandi, Mehrdad Mofidi
  • Publication number: 20080158947
    Abstract: System for a non-volatile memory system is provided. The non-volatile memory system includes a voltage generator system operating in one of a plurality of modes for generating a voltage applied to a memory cell of the non-volatile memory system. For one of the plurality of modes, a first input value is selected for controlling a temperature dependent component of the voltage and a second input value is selected for controlling a temperature independent component of the voltage. The temperature dependent component of the voltage and the temperature independent component of the voltage are controlled independently in response to the first input value and the second input value.
    Type: Application
    Filed: December 29, 2006
    Publication date: July 3, 2008
    Inventors: Jun Li, Prajit Nandi, Mehrdad Mofidi
  • Publication number: 20080159000
    Abstract: Method for controlling voltage in a non-volatile memory system is provided. The method includes selecting a first input value for a voltage generator system operating in one of a plurality of modes, the first input value controlling a temperature dependent component of a voltage applied to a memory cell; and selecting a second input value for the voltage generator system operating in one of the plurality of modes, the second input value controlling a temperature independent component of the voltage applied to the memory cell. The temperature dependent component of the voltage applied to the memory cell and the temperature independent component of the voltage applied to the memory cell are controlled independently in response to the first input value and the second input value.
    Type: Application
    Filed: December 29, 2006
    Publication date: July 3, 2008
    Inventors: Jun Li, Prajit Nandi, Mehrdad Mofidi
  • Publication number: 20070297234
    Abstract: When programming a contiguous page of memory storage units, every time a memory storage unit has reached its targeted state and is program-inhibited or locked out from further programming, it creates a perturbation on an adjacent memory storage unit still under programming. The present invention provides as part of a programming circuit and method in which an offset to the perturbation is added to the adjacent memory storage unit still under programming. The offset is added by a controlled coupling between the adjacent bit lines of the program-inhibited memory storage unit and the still under programming memory storage unit. In this way, an error inherent in programming in parallel high-density memory storage units is eliminated or minimized.
    Type: Application
    Filed: August 31, 2007
    Publication date: December 27, 2007
    Inventors: Raul-Adrian Cernea, Yan Li, Mehrdad Mofidi, Shahzad Khalid
  • Patent number: 7269069
    Abstract: When programming a contiguous page of memory storage units, every time a memory storage unit has reached its targeted state and is program-inhibited or locked out from further programming, it creates a perturbation on an adjacent memory storage unit still under programming. The present invention provides as part of a programming circuit and method in which an offset to the perturbation is added to the adjacent memory storage unit still under programming. The offset is added by a controlled coupling between the adjacent bit lines of the program-inhibited memory storage unit and the still under programming memory storage unit. In this way, an error inherent in programming in parallel high-density memory storage units is eliminated or minimized.
    Type: Grant
    Filed: June 2, 2006
    Date of Patent: September 11, 2007
    Assignee: SanDisk Corporation
    Inventors: Raul-Adrian Cernea, Yan Li, Mehrdad Mofidi, Shahzad Khalid
  • Patent number: 7215574
    Abstract: When programming a contiguous page of memory storage units, every time a memory storage unit has reached its targeted state and is program-inhibited or locked out from further programming, it creates a perturbation on an adjacent memory storage unit still under programming. The present invention provides as part of a programming circuit and method in which an offset to the perturbation is added to the adjacent memory storage unit still under programming. The offset is added as voltage offset to a bit line of a storage unit under programming. The voltage offset is a predetermined function of whether none or one or both of its neighbors are in a mode that creates perturbation, such as in a program inhibit mode. In this way, an error inherent in programming in parallel high-density memory storage units is eliminated or minimized.
    Type: Grant
    Filed: October 13, 2005
    Date of Patent: May 8, 2007
    Assignee: Sandisk Corporation
    Inventors: Shahzad Khalid, Yan Li, Raul-Adrian Cernea, Mehrdad Mofidi
  • Publication number: 20060227614
    Abstract: When programming a contiguous page of memory storage units, every time a memory storage unit has reached its targeted state and is program-inhibited or locked out from further programming, it creates a perturbation on an adjacent memory storage unit still under programming. The present invention provides as part of a programming circuit and method in which an offset to the perturbation is added to the adjacent memory storage unit still under programming. The offset is added by a controlled coupling between the adjacent bit lines of the program-inhibited memory storage unit and the still under programming memory storage unit. In this way, an error inherent in programming in parallel high-density memory storage units is eliminated or minimized.
    Type: Application
    Filed: June 2, 2006
    Publication date: October 12, 2006
    Inventors: Raul-Adrian Cernea, Yan Li, Mehrdad Mofidi, Shahzad Khalid