Patents by Inventor Iris Lu

Iris Lu 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: 11929125
    Abstract: Apparatuses and techniques are described for reducing the number of latches used in sense circuits for a memory device. The number of internal user data latches in a sense circuit is reduced by using an external data transfer latch to store a bit of user data, in place of an internal user data latch. The user data in the data transfer latches identifies a subset of the data states which are not prohibited from having a verify test. The subset is shifted as the program operation proceeds, at specified program loops, to encompass higher data states. The completion of programming by a memory cell is indicated by the user data latches and another internal latch of the sense circuit in place of the external data transfer latch.
    Type: Grant
    Filed: June 23, 2021
    Date of Patent: March 12, 2024
    Assignee: SanDisk Technologies LLC
    Inventors: Tai-Yuan Tseng, Chia-Kai Chou, Iris Lu
  • Patent number: 11915769
    Abstract: A non-volatile memory device includes a control circuit configured to connect to a bit line that is connected to one or more non-volatile memory cells. The control circuit includes a first plurality of data latches connected to a first local data bus to store first program-verify pass/fail bits and a second plurality of data latches connected to a second local data bus to store second program-verify pass/fail bits for second non-volatile memory cells. The non-volatile memory device further includes a shared isolation latch and one or more interface circuits connected to the first local data bus and the second local data bus. The one or more interface circuits are configured to selectively block the first program-verify pass/fail bits from the first plurality of latches and the second program-verify pass/fail bits from the second plurality of latches according to an indicator bit stored in the shared isolation latch.
    Type: Grant
    Filed: May 16, 2022
    Date of Patent: February 27, 2024
    Assignee: SanDisk Technologies LLC
    Inventors: Kei Kitamura, Iris Lu, Tai-Yuan Tseng
  • Patent number: 11901018
    Abstract: A local data bus of a sense amplifier associated with one bit line is used to perform logical operations for a sensing operation performed by another sense amplifier associated with a different bit line. Each sense amplifier circuit includes a sensing node that is pre-charged, then discharged through a selected memory cell and a local data bus with a number of data latches connected. Target program data can be stored in the latches and combined in logical combinations with the sensed value of the memory cell to determine whether it has verified. By including a transfer circuit between the local data buses of a pair of sense amplifiers, the logical operations of a first sense amplifier can be performed using the local data bus of the paired sense amplifier, freeing the first sense amplifier's sense node to be concurrently pre-charged for a subsequent sensing operation, thereby improving performance.
    Type: Grant
    Filed: December 27, 2021
    Date of Patent: February 13, 2024
    Assignee: SanDisk Technologies LLC
    Inventors: Iris Lu, Tai-Yuan Tseng, Chia-Kai Chou
  • Publication number: 20230368852
    Abstract: A non-volatile memory device includes a control circuit configured to connect to a bit line that is connected to one or more non-volatile memory cells. The control circuit includes a first plurality of data latches connected to a first local data bus to store first program-verify pass/fail bits and a second plurality of data latches connected to a second local data bus to store second program-verify pass/fail bits for second non-volatile memory cells. The non-volatile memory device further includes a shared isolation latch and one or more interface circuits connected to the first local data bus and the second local data bus. The one or more interface circuits are configured to selectively block the first program-verify pass/fail bits from the first plurality of latches and the second program-verify pass/fail bits from the second plurality of latches according to an indicator bit stored in the shared isolation latch.
    Type: Application
    Filed: May 16, 2022
    Publication date: November 16, 2023
    Applicant: SanDisk Technologies LLC
    Inventors: Kei Kitamura, Iris Lu, Tai-Yuan Tseng
  • Patent number: 11798631
    Abstract: Read and write circuitry, described herein, comprises data latches, each data latch connected to a bit line and arranged in a same column as the bit line; and transfer latches, each transfer latch connected to a data latch and arranged in a same column as the data latch. Further, circuitry described herein is configured to: transfer a word to and from the transfer latches of a first column and the subset of transfer latches of a second column; transfer a first portion of the word between the transfer latches of the first column and data latches of the first column that are connected to the transfer latches of the first column; and transfer a second portion of the word between the subset of transfer latches and data latches of the second column that are connected to the subset of transfer latches.
    Type: Grant
    Filed: October 21, 2021
    Date of Patent: October 24, 2023
    Assignee: SanDisk Technologies LLC
    Inventors: Iris Lu, Tai-Yuan Tseng
  • Patent number: 11699502
    Abstract: Technology is disclosed herein for testing circuitry that controls memory operations in a memory structure having non-volatile memory cells. The testing of the circuitry can be performed without the memory structure. The memory structure may reside on one semiconductor die, with sense blocks and a control circuit on another semiconductor die. The control circuit is able to perform die level control of memory operations in the memory structure. The control circuit may control the sense blocks to simulate sensing of non-volatile memory cells in the memory structure even though the sense blocks are not connected to the memory structure. The control circuit verifies correct operation of the semiconductor die based on the simulated sensing. For example, the control circuit may verify correct operation of a state machine that controls sense operations at a die level. Thus, the operation of the semiconductor die may be tested without the memory structure.
    Type: Grant
    Filed: December 14, 2021
    Date of Patent: July 11, 2023
    Assignee: SanDisk Technologies LLC
    Inventors: Iris Lu, Yan Li, Ohwon Kwon
  • Publication number: 20230207022
    Abstract: A local data bus of a sense amplifier associated with one bit line is used to perform logical operations for a sensing operation performed by another sense amplifier associated with a different bit line. Each sense amplifier circuit includes a sensing node that is pre-charged, then discharged through a selected memory cell and a local data bus with a number of data latches connected. Target program data can be stored in the latches and combined in logical combinations with the sensed value of the memory cell to determine whether it has verified. By including a transfer circuit between the local data buses of a pair of sense amplifiers, the logical operations of a first sense amplifier can be performed using the local data bus of the paired sense amplifier, freeing the first sense amplifier's sense node to be concurrently pre-charged for a subsequent sensing operation, thereby improving performance.
    Type: Application
    Filed: December 27, 2021
    Publication date: June 29, 2023
    Applicant: SanDisk Technologies LLC
    Inventors: Iris Lu, Tai-Yuan Tseng, Chia-Kai Chou
  • Publication number: 20230187014
    Abstract: Technology is disclosed herein for testing circuitry that controls memory operations in a memory structure having non-volatile memory cells. The testing of the circuitry can be performed without the memory structure. The memory structure may reside on one semiconductor die, with sense blocks and a control circuit on another semiconductor die. The control circuit is able to perform die level control of memory operations in the memory structure. The control circuit may control the sense blocks to simulate sensing of non-volatile memory cells in the memory structure even though the sense blocks are not connected to the memory structure. The control circuit verifies correct operation of the semiconductor die based on the simulated sensing. For example, the control circuit may verify correct operation of a state machine that controls sense operations at a die level. Thus, the operation of the semiconductor die may be tested without the memory structure.
    Type: Application
    Filed: December 14, 2021
    Publication date: June 15, 2023
    Applicant: SanDisk Technologies LLC
    Inventors: Iris Lu, Yan Li, Ohwon Kwon
  • Publication number: 20230130365
    Abstract: Read and write circuitry, described herein, comprises data latches, each data latch connected to a bit line and arranged in a same column as the bit line; and transfer latches, each transfer latch connected to a data latch and arranged in a same column as the data latch. Further, circuitry described herein is configured to: transfer a word to and from the transfer latches of a first column and the subset of transfer latches of a second column; transfer a first portion of the word between the transfer latches of the first column and data latches of the first column that are connected to the transfer latches of the first column; and transfer a second portion of the word between the subset of transfer latches and data latches of the second column that are connected to the subset of transfer latches.
    Type: Application
    Filed: October 21, 2021
    Publication date: April 27, 2023
    Applicant: SanDisk Technologies LLC
    Inventors: Iris Lu, Tai-Yuan Tseng
  • Publication number: 20220415415
    Abstract: Apparatuses and techniques are described for reducing the number of latches used in sense circuits for a memory device. The number of internal user data latches in a sense circuit is reduced by using an external data transfer latch to store a bit of user data, in place of an internal user data latch. The user data in the data transfer latches identifies a subset of the data states which are not prohibited from having a verify test. The subset is shifted as the program operation proceeds, at specified program loops, to encompass higher data states. The completion of programming by a memory cell is indicated by the user data latches and another internal latch of the sense circuit in place of the external data transfer latch.
    Type: Application
    Filed: June 23, 2021
    Publication date: December 29, 2022
    Applicant: SanDisk Technologies LLC
    Inventors: Tai-Yuan Tseng, Chia-Kai Chou, Iris Lu
  • Patent number: 10967023
    Abstract: Disclosed is a Chinese medicinal composition prepared from the following medical raw materials in parts by weight: 1 part of ginseng, 0.8-1.5 parts of ginkgo leaf and 0.018-0.030 part of stigma croci.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: April 6, 2021
    Assignee: Shineway Pharmaceutical Group Ltd.
    Inventors: Jianxun Liu, Vivian Zhang, Zhigang Li, Shyflysky Zhang, Xiuwei Guan, Iris Lu, Weibo Gao, Li Xu, Wenting Song
  • Publication number: 20190328810
    Abstract: Disclosed are a Chinese medicinal composition for preventing or treating cardiovascular and cerebrovascular diseases and/or dementia, and a preparation method and use thereof. The composition is prepared from the following medical raw materials in parts by weight: 1 part of ginseng, 0.8-1.5 parts of ginkgo leaf and 0.018-0.030 part of stigma croci.
    Type: Application
    Filed: July 9, 2019
    Publication date: October 31, 2019
    Inventors: Jianxun Liu, Vivian Zhang, Zhigang Li, Shyflysky Zhang, Xiuwei Guan, Iris Lu, Weibo Gao, Li Xu, Wenting Song
  • Publication number: 20170354700
    Abstract: Disclosed are a Chinese medicinal composition for preventing or treating cardiovascular and cerebrovascular diseases and/or dementia, and a preparation method and use thereof. The composition is prepared from the following medical raw materials in parts by weight: 1 part of ginseng, 0.8-1.5 parts of ginkgo leaf and 0.018-0.030 part of stigma croci.
    Type: Application
    Filed: December 29, 2015
    Publication date: December 14, 2017
    Inventors: Jianxun Liu, Vivian Zhang, Zhigang Li, Shyflysky Zhang, Xiuwei Guan, Iris Lu, Weibo Gao, Li Xu, Wenting Song