Patents by Inventor Michael A. Ziegerhofer

Michael A. Ziegerhofer 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: 11295829
    Abstract: A BIST engine configured to store a per pattern based fail status during memory BIST run and related processes thereof are provided. The method includes testing a plurality of patterns in at least one memory device and determining which of the plurality of patterns has detected a fail during execution of each pattern. The method further includes storing a per pattern based fail status of each of the detected failed patterns.
    Type: Grant
    Filed: November 6, 2019
    Date of Patent: April 5, 2022
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Aravindan J. Busi, John R. Goss, Paul J. Grzymkowski, Krishnendu Mondal, Kiran K. Narayan, Michael R. Ouellette, Michael A. Ziegerhofer
  • Patent number: 11288120
    Abstract: Embodiments of the present disclosure provide an a circuit including: first logic to compare output data from the shift register with output data from error correcting code circuitry (ECC), to output an error signal in response to a data bit output from the shift register being different from a data bit output from the ECC; second logic for receiving the error signal from the first logic gate, and a correctability signal from the ECC, to output an overwrite signal in response to receiving the error signal and the correctability signal; and a selector receiving the overwrite signal and the data bit of the output data from the ECC, and coupled between a data source and an input line to the shift register. The selector causes the shift register to receive the ECC output in response to receiving the overwrite signal.
    Type: Grant
    Filed: March 13, 2020
    Date of Patent: March 29, 2022
    Assignee: MARVELL ASIA PTE LTD.
    Inventor: Michael A. Ziegerhofer
  • Publication number: 20210286672
    Abstract: Embodiments of the present disclosure provide an a circuit including: first logic to compare output data from the shift register with output data from error correcting code circuitry (ECC), to output an error signal in response to a data bit output from the shift register being different from a data bit output from the ECC; second logic for receiving the error signal from the first logic gate, and a correctability signal from the ECC, to output an overwrite signal in response to receiving the error signal and the correctability signal; and a selector receiving the overwrite signal and the data bit of the output data from the ECC, and coupled between a data source and an input line to the shift register. The selector causes the shift register to receive the ECC output in response to receiving the overwrite signal.
    Type: Application
    Filed: March 13, 2020
    Publication date: September 16, 2021
    Inventor: Michael A. Ziegerhofer
  • Patent number: 10971243
    Abstract: A BIST engine configured to store a per pattern based fail status during memory BIST run and related processes thereof are provided. The method includes testing a plurality of patterns in at least one memory device and determining which of the plurality of patterns has detected a fail during execution of each pattern. The method further includes storing a per pattern based fail status of each of the detected failed patterns.
    Type: Grant
    Filed: August 22, 2019
    Date of Patent: April 6, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Aravindan J. Busi, John R. Goss, Paul J. Grzymkowski, Krishnendu Mondal, Kiran K. Narayan, Michael R. Ouellette, Michael A. Ziegerhofer
  • Patent number: 10950325
    Abstract: The present disclosure relates to a structure including a memory built-in self test (MBIST) circuit which is configured to repair a multi-cell failure for a plurality of patterns in a single wordline of a sliding window of a memory.
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: March 16, 2021
    Assignee: Marvell Asia Pte., Ltd.
    Inventors: Deepak I. Hanagandi, Igor Arsovski, Michael A. Ziegerhofer, Valerie H. Chickanosky, Kalpesh R. Lodha
  • Patent number: 10839931
    Abstract: The present disclosure relates to a structure which includes a memory which is configured to enable zero test time built-in self-test (BIST) at a read/write port while concurrently performing at least one functional read operation at a read port.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: November 17, 2020
    Assignee: MARVELL ASIA PTE, LTD.
    Inventors: Igor Arsovski, Eric D. Hunt-Schroeder, Michael A. Ziegerhofer
  • Publication number: 20200321070
    Abstract: The present disclosure relates to a structure including a memory built-in self test (MBIST) circuit which is configured to repair a multi-cell failure for a plurality of patterns in a single wordline of a sliding window of a memory.
    Type: Application
    Filed: April 4, 2019
    Publication date: October 8, 2020
    Inventors: Deepak I. HANAGANDI, Igor ARSOVSKI, Michael A. ZIEGERHOFER, Valerie H. CHICKANOSKY, Kalpesh R. LODHA
  • Patent number: 10692584
    Abstract: A BIST engine configured to store a per pattern based fail status during memory BIST run and related processes thereof are provided. The method includes testing a plurality of patterns in at least one memory device and determining which of the plurality of patterns has detected a fail during execution of each pattern. The method further includes storing a per pattern based fail status of each of the detected failed patterns.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: June 23, 2020
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Aravindan J. Busi, John R. Goss, Paul J. Grzymkowski, Krishnendu Mondal, Kiran K. Narayan, Michael R. Ouellette, Michael A. Ziegerhofer
  • Publication number: 20200075119
    Abstract: A BIST engine configured to store a per pattern based fail status during memory BIST run and related processes thereof are provided. The method includes testing a plurality of patterns in at least one memory device and determining which of the plurality of patterns has detected a fail during execution of each pattern. The method further includes storing a per pattern based fail status of each of the detected failed patterns.
    Type: Application
    Filed: November 6, 2019
    Publication date: March 5, 2020
    Inventors: Aravindan J. BUSI, John R. GOSS, Paul J. GRZYMKOWSKI, Krishnendu MONDAL, Kiran K. NARAYAN, Michael R. OUELLETTE, Michael A. ZIEGERHOFER
  • Patent number: 10553302
    Abstract: A BIST engine configured to store a per pattern based fail status during memory BIST run and related processes thereof are provided. The method includes testing a plurality of patterns in at least one memory device and determining which of the plurality of patterns has detected a fail during execution of each pattern. The method further includes storing a per pattern based fail status of each of the detected failed patterns.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: February 4, 2020
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Aravindan J. Busi, John R. Goss, Paul J. Grzymkowski, Krishnendu Mondal, Kiran K. Narayan, Michael R. Ouellette, Michael A. Ziegerhofer
  • Publication number: 20190378587
    Abstract: A BIST engine configured to store a per pattern based fail status during memory BIST run and related processes thereof are provided. The method includes testing a plurality of patterns in at least one memory device and determining which of the plurality of patterns has detected a fail during execution of each pattern. The method further includes storing a per pattern based fail status of each of the detected failed patterns.
    Type: Application
    Filed: August 22, 2019
    Publication date: December 12, 2019
    Inventors: Aravindan J. BUSI, John R. GOSS, Paul J. GRZYMKOWSKI, Krishnendu MONDAL, Kiran K. NARAYAN, Michael R. OUELLETTE, Michael A. ZIEGERHOFER
  • Patent number: 10490296
    Abstract: Approaches for a memory built-in self-test (MBIST) are provided. The MBIST circuit includes a fail status register which receives a new fail signal value in response to a detection of a unique fail in a pattern, and a pattern mask register which stores at an end of the pattern a different value of the new fail signal value representative of the unique fail.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: November 26, 2019
    Assignee: GLOBALFOUNDRIES U.S. INC.
    Inventors: Michael R. Ouellette, Deepak I. Hanagandi, Aravindan J. Busi, Kiran K. Narayan, Michael A. Ziegerhofer
  • Publication number: 20190348137
    Abstract: The present disclosure relates to a structure which includes a memory which is configured to enable zero test time built-in self-test (BIST) at a read/write port while concurrently performing at least one functional read operation at a read port.
    Type: Application
    Filed: July 24, 2019
    Publication date: November 14, 2019
    Inventors: Igor ARSOVSKI, Eric D. HUNT-SCHROEDER, Michael A. ZIEGERHOFER
  • Patent number: 10438678
    Abstract: The present disclosure relates to a structure which includes a memory which is configured to enable zero test time built-in self-test (BIST) at a read/write port while concurrently performing at least one functional read operation at a read port.
    Type: Grant
    Filed: April 4, 2017
    Date of Patent: October 8, 2019
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Igor Arsovski, Eric D. Hunt-Schroeder, Michael A. Ziegerhofer
  • Publication number: 20180286491
    Abstract: The present disclosure relates to a structure which includes a memory which is configured to enable zero test time built-in self-test (BIST) at a read/write port while concurrently performing at least one functional read operation at a read port.
    Type: Application
    Filed: April 4, 2017
    Publication date: October 4, 2018
    Inventors: Igor ARSOVSKI, Eric D. HUNT-SCHROEDER, Michael A. ZIEGERHOFER
  • Publication number: 20180061509
    Abstract: A BIST engine configured to store a per pattern based fail status during memory BIST run and related processes thereof are provided. The method includes testing a plurality of patterns in at least one memory device and determining which of the plurality of patterns has detected a fail during execution of each pattern. The method further includes storing a per pattern based fail status of each of the detected failed patterns.
    Type: Application
    Filed: November 2, 2017
    Publication date: March 1, 2018
    Inventors: Aravindan J. BUSI, John R. GOSS, Paul J. GRZYMKOWSKI, Krishnendu MONDAL, Kiran K. NARAYAN, Michael R. OUELLETTE, Michael A. ZIEGERHOFER
  • Publication number: 20180053566
    Abstract: A BIST engine configured to store a per pattern based fail status during memory BIST run and related processes thereof are provided. The method includes testing a plurality of patterns in at least one memory device and determining which of the plurality of patterns has detected a fail during execution of each pattern. The method further includes storing a per pattern based fail status of each of the detected failed patterns.
    Type: Application
    Filed: October 31, 2017
    Publication date: February 22, 2018
    Inventors: Aravindan J. BUSI, John R. GOSS, Paul J. GRZYMKOWSKI, Krishnendu MONDAL, Kiran K. NARAYAN, Michael R. OUELLETTE, Michael A. ZIEGERHOFER
  • Patent number: 9881694
    Abstract: A BIST engine configured to store a per pattern based fail status during memory BIST run and related processes thereof are provided. The method includes testing a plurality of patterns in at least one memory device and determining which of the plurality of patterns has detected a fail during execution of each pattern. The method further includes storing a per pattern based fail status of each of the detected failed patterns.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: January 30, 2018
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Aravindan J. Busi, John R. Goss, Paul J. Grzymkowski, Krishnendu Mondal, Kiran K. Narayan, Michael R. Ouellette, Michael A. Ziegerhofer
  • Patent number: 9859019
    Abstract: A system and method control an operation of a built-in self-test (BIST) of memory devices of an integrated circuit. The method includes generating count values using a program counter, and providing a first burst of instructions to the memory devices. The method also includes controlling a chip enable signal associated with each of the memory devices according to the count values during a wait period following the providing the first burst of instructions until a second burst of instructions is provided to the memory devices. The chip enable signal of each of the memory devices defines clock cycles at which the memory device is operated and clock cycles at which the memory device is idle.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: January 2, 2018
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Deepak I. Hanagandi, Krishnendu Mondal, Kiran K. Narayan, Michael R. Ouellette, Michael A. Ziegerhofer
  • Publication number: 20170229191
    Abstract: Approaches for a memory built-in self-test (MBIST) are provided. The MBIST circuit includes a fail status register which receives a new fail signal value in response to a detection of a unique fail in a pattern, and a pattern mask register which stores at an end of the pattern a different value of the new fail signal value representative of the unique fail.
    Type: Application
    Filed: February 9, 2016
    Publication date: August 10, 2017
    Inventors: Michael R. Ouellette, Deepak I. Hanagandi, Aravindan J. Busi, Kiran K. Narayan, Michael A. Ziegerhofer