Patents by Inventor Chang H. Siau

Chang H. Siau 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: 11875861
    Abstract: Sensing devices might include a first voltage node configured to receive a first voltage level, a second voltage node configured to receive a second voltage level lower than the first voltage level, a p-type field-effect transistor (pFET) selectively connected to a data line, and a sense node selectively connected to the pFET. The pFET might be connected between the first voltage node and the data line, between the second voltage node and the data line, and between the first voltage node and the data line. Memories might have controllers configured to cause the memories to determine whether a memory cell has an intended threshold voltage using similar sensing devices.
    Type: Grant
    Filed: November 4, 2022
    Date of Patent: January 16, 2024
    Assignee: Micron Technology, Inc.
    Inventors: Chang H. Siau, Hao T. Nguyen
  • Patent number: 11861236
    Abstract: A memory device includes a memory array comprising a plurality of planes, a primary plane driver circuit comprising components to support read operations, program operations, and erase operations on any of the plurality of planes, and a secondary plane driver circuit comprising components to support read operations on an associated one of the plurality of planes. The primary plane driver circuit is configured to perform a first read operation on a first plane of the plurality of planes and the secondary plane driver circuit is configured to perform a second read operation on a second plane of the plurality of planes concurrently with the first read operation.
    Type: Grant
    Filed: May 11, 2022
    Date of Patent: January 2, 2024
    Assignee: Micron Technology, Inc.
    Inventors: Kalyan Chakravarthy C. Kavalipurapu, Chang H. Siau, Shigekazu Yamada
  • Patent number: 11791003
    Abstract: A memory device includes a memory array of memory cells and control logic, operatively coupled with the memory array. The control logic is to perform operations, which include causing the memory cells to be programmed with an initial voltage distribution representing multiple logical states; causing the memory cells to be programmed with a subsequent voltage distribution representing a subset of the multiple logical states at a higher voltage than that of the initial voltage distribution, wherein the subset of the multiple logical states is compacted above a program verify voltage level for the subsequent voltage distribution; and causing a first program verify operation of the subsequent voltage distribution to be performed on the memory cells to verify one or more voltage levels of the subsequent voltage distribution.
    Type: Grant
    Filed: October 5, 2022
    Date of Patent: October 17, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Kalyan Chakravarthy Kavalipurapu, George Matamis, Yingda Dong, Chang H. Siau
  • Patent number: 11670346
    Abstract: Memory having an array of memory cells and a plurality of access lines each connected to a respective plurality of memory cells of the array of memory cells might include a controller configured to cause the memory to apply a respective programming pulse having a first target voltage level and a first pulse width to each access line of a first subset of access lines of the plurality of access lines, and apply a respective programming pulse having the first target voltage level and a second pulse width longer than the first pulse width to each access line of a second subset of access lines of the plurality of access lines, wherein each access line of the first subset of access lines is nearer a particular end of the string of series-connected memory cells than each access line of the second subset of access lines.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: June 6, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Chang H. Siau, Michele Piccardi, Qui V. Nguyen
  • Publication number: 20230111510
    Abstract: Disclosed in some examples are methods, systems, devices, memory devices, and machine-readable mediums for using a non-defective portion of a block of memory on which there is a defect on a different portion. Rather than disable the entire block, the system may disable only a portion of the block (e.g., a first deck of the block) and salvage a different portion of the block (e.g., a second deck of the block).
    Type: Application
    Filed: December 6, 2022
    Publication date: April 13, 2023
    Inventors: Sri Rama Namala, Lu Tong, Kristopher Kopel, Sheng-Huang Lee, Chang H. Siau
  • Publication number: 20230061258
    Abstract: Memory devices and associated methods and systems are disclosed herein. A representative memory device includes a substrate and a memory controller electrically coupled to the substrate. The memory controller can include a first in/out (I/O) channel and a second I/O channel. The memory device can further include a plurality of first memories and second memories coupled to the substrate and arranged in a stack in which the first memories are interleaved between the second memories. The memory device can further include (i) a plurality of first wire bonds electrically coupling the first memories to the first I/O channel of the memory controller and (ii) a plurality of second wire bonds electrically coupling the second memories to the second I/O channel.
    Type: Application
    Filed: April 11, 2022
    Publication date: March 2, 2023
    Inventors: Koichi Kawai, Raj K. Bansal, Takehiro Hasegawa, Chang H. Siau
  • Publication number: 20230068580
    Abstract: A memory device including a first plane group comprising a first plane, a second plane group comprising a second plane, a first input/output (I/O) interface configured to access the first plane group, and a second I/O interface configured to access the second plane group. The memory device further includes a controller operatively coupled to the first I/O interface via a first channel and operatively coupled to the second I/O interface via a second channel. The controller can transmit, via the first channel to the first I/O interface, a first command to execute a first memory access operation associated with the first plane. The controller can transmit, via the second channel to the second I/O interface, a second command to execute a second memory access operation associated with the second plane.
    Type: Application
    Filed: February 15, 2022
    Publication date: March 2, 2023
    Inventors: Chang H. Siau, Jonathan S. Parry
  • Publication number: 20230046283
    Abstract: Sensing devices might include a first voltage node configured to receive a first voltage level, a second voltage node configured to receive a second voltage level lower than the first voltage level, a p-type field-effect transistor (pFET) selectively connected to a data line, and a sense node selectively connected to the pFET. The pFET might be connected between the first voltage node and the data line, between the second voltage node and the data line, and between the first voltage node and the data line. Memories might have controllers configured to cause the memories to determine whether a memory cell has an intended threshold voltage using similar sensing devices.
    Type: Application
    Filed: November 4, 2022
    Publication date: February 16, 2023
    Applicant: MICRON TECHNOLOGY, INC.
    Inventors: Chang H. Siau, Hao T. Nguyen
  • Publication number: 20230022858
    Abstract: A memory device includes a memory array of memory cells and control logic, operatively coupled with the memory array. The control logic is to perform operations, which include causing the memory cells to be programmed with an initial voltage distribution representing multiple logical states; causing the memory cells to be programmed with a subsequent voltage distribution representing a subset of the multiple logical states at a higher voltage than that of the initial voltage distribution, wherein the subset of the multiple logical states is compacted above a program verify voltage level for the subsequent voltage distribution; and causing a first program verify operation of the subsequent voltage distribution to be performed on the memory cells to verify one or more voltage levels of the subsequent voltage distribution.
    Type: Application
    Filed: October 5, 2022
    Publication date: January 26, 2023
    Inventors: Kalyan Chakravarthy Kavalipurapu, George Matamis, Yingda Dong, Chang H. Siau
  • Publication number: 20220415794
    Abstract: A microelectronic device comprises blocks, contact structures, filled vias, and a base structure. The blocks each have a vertically alternating sequence of conductive structures and insulative structures arranged in tiers. Each block comprises a forward staircase structure and a reverse staircase structure. The contact structures are on steps of the forward staircase structure of a first of the blocks and on additional steps of the reverse staircase structure of a second of the blocks horizontally neighboring the first of the blocks. The filled vias extend through portions of the first of the blocks within horizontal boundaries of the reverse staircase structure of the first of the blocks and extend through portions of the second of the blocks within horizontal boundaries of the forward staircase structure of the second of the blocks. The base structure underlies the blocks and comprises transistors coupled to the filled vias.
    Type: Application
    Filed: September 2, 2022
    Publication date: December 29, 2022
    Inventors: Qui V. Nguyen, Chang H. Siau
  • Patent number: 11537484
    Abstract: Disclosed in some examples are methods, systems, devices, memory devices, and machine-readable mediums for using a non-defective portion of a block of memory on which there is a defect on a different portion. Rather than disable the entire block, the system may disable only a portion of the block (e.g., a first deck of the block) and salvage a different portion of the block (e.g., a second deck of the block).
    Type: Grant
    Filed: August 6, 2021
    Date of Patent: December 27, 2022
    Assignee: Micron Technology, Inc.
    Inventors: Sri Rama Namala, Lu Tong, Kristopher Kopel, Sheng-Huang Lee, Chang H. Siau
  • Patent number: 11508444
    Abstract: Sensing devices might include a first voltage node configured to receive a first voltage level, a second voltage node configured to receive a second voltage level lower than the first voltage level, a p-type field-effect transistor (pFET) selectively connected to a data line, and a sense node selectively connected to the pFET. The pFET might be connected between the first voltage node and the data line, between the second voltage node and the data line, and between the first voltage node and the data line. Memories might have controllers configured to cause the memories to determine whether a memory cell has an intended threshold voltage using similar sensing devices.
    Type: Grant
    Filed: March 12, 2021
    Date of Patent: November 22, 2022
    Assignee: Micron Technology, Inc.
    Inventors: Chang H. Siau, Hao T. Nguyen
  • Patent number: 11488677
    Abstract: A memory device includes a memory array of memory cells and control logic, operatively coupled with the memory array. The control logic is to perform operations, which include causing the memory cells to be programmed with an initial voltage distribution representing multiple logical states; causing the memory cells to be programmed with a subsequent voltage distribution representing a subset of the multiple logical states at a higher voltage than that of the initial voltage distribution, wherein the subset of the multiple logical states is compacted above a program verify voltage level for the subsequent voltage distribution; and causing a first program verify operation of the subsequent voltage distribution to be performed on the memory cells to verify one or more voltage levels of the subsequent voltage distribution.
    Type: Grant
    Filed: December 10, 2020
    Date of Patent: November 1, 2022
    Assignee: MICRON TECHNOLOGY, INC.
    Inventors: Kalyan Chakravarthy Kavalipurapu, George Matamis, Yingda Dong, Chang H. Siau
  • Patent number: 11437318
    Abstract: A microelectronic device comprises blocks, contact structures, filled vias, and a base structure. The blocks each have a vertically alternating sequence of conductive structures and insulative structures arranged in tiers. Each block comprises a forward staircase structure and a reverse staircase structure. The contact structures are on steps of the forward staircase structure of a first of the blocks and on additional steps of the reverse staircase structure of a second of the blocks horizontally neighboring the first of the blocks. The filled vias extend through portions of the first of the blocks within horizontal boundaries of the reverse staircase structure of the first of the blocks and extend through portions of the second of the blocks within horizontal boundaries of the forward staircase structure of the second of the blocks. The base structure underlies the blocks and comprises transistors coupled to the filled vias.
    Type: Grant
    Filed: June 12, 2020
    Date of Patent: September 6, 2022
    Assignee: Micron Technology, Inc.
    Inventors: Qui V. Nguyen, Chang H. Siau
  • Publication number: 20220276806
    Abstract: A memory device includes a memory array comprising a plurality of planes, a primary plane driver circuit comprising components to support read operations, program operations, and erase operations on any of the plurality of planes, and a secondary plane driver circuit comprising components to support read operations on an associated one of the plurality of planes. The primary plane driver circuit is configured to perform a first read operation on a first plane of the plurality of planes and the secondary plane driver circuit is configured to perform a second read operation on a second plane of the plurality of planes concurrently with the first read operation.
    Type: Application
    Filed: May 11, 2022
    Publication date: September 1, 2022
    Inventors: Kalyan Chakravarthy C. Kavalipurapu, Chang H. Siau, Shigekazu Yamada
  • Publication number: 20220208283
    Abstract: Sensing devices might include a first voltage node configured to receive a first voltage level, a second voltage node configured to receive a second voltage level lower than the first voltage level, a p-type field-effect transistor (pFET) selectively connected to a data line, and a sense node selectively connected to the pFET. The pFET might be connected between the first voltage node and the data line, between the second voltage node and the data line, and between the first voltage node and the data line. Memories might have controllers configured to cause the memories to determine whether a memory cell has an intended threshold voltage using similar sensing devices.
    Type: Application
    Filed: March 12, 2021
    Publication date: June 30, 2022
    Applicant: MICRON TECHNOLOGY, INC.
    Inventors: Chang H. Siau, Hao T. Nguyen
  • Publication number: 20220189570
    Abstract: A memory device includes a memory array of memory cells and control logic, operatively coupled with the memory array. The control logic is to perform operations, which include causing the memory cells to be programmed with an initial voltage distribution representing multiple logical states; causing the memory cells to be programmed with a subsequent voltage distribution representing a subset of the multiple logical states at a higher voltage than that of the initial voltage distribution, wherein the subset of the multiple logical states is compacted above a program verify voltage level for the subsequent voltage distribution; and causing a first program verify operation of the subsequent voltage distribution to be performed on the memory cells to verify one or more voltage levels of the subsequent voltage distribution.
    Type: Application
    Filed: December 10, 2020
    Publication date: June 16, 2022
    Inventors: Kalyan Chakravarthy Kavalipurapu, George Matamis, Yingda Dong, Chang H. Siau
  • Patent number: 11354067
    Abstract: A memory device includes a memory array comprising a plurality of planes, a primary plane driver circuit comprising components to support read operations, program operations, and erase operations on any of the plurality of planes, and a secondary plane driver circuit comprising components to support read operations on an associated one of the plurality of planes. The primary plane driver circuit is configured to perform a first read operation on a first plane of the plurality of planes and the secondary plane driver circuit is configured to perform a second read operation on a second plane of the plurality of planes concurrently with the first read operation.
    Type: Grant
    Filed: August 5, 2020
    Date of Patent: June 7, 2022
    Assignee: MICRON TECHNOLOGY, INC.
    Inventors: Kalyan Chakravarthy C. Kavalipurapu, Chang H. Siau, Shigekazu Yamada
  • Publication number: 20220066894
    Abstract: Disclosed in some examples are methods, systems, devices, memory devices, and machine-readable mediums for using a non-defective portion of a block of memory on which there is a defect on a different portion. Rather than disable the entire block, the system may disable only a portion of the block (e.g., a first deck of the block) and salvage a different portion of the block (e.g., a second deck of the block).
    Type: Application
    Filed: August 6, 2021
    Publication date: March 3, 2022
    Inventors: Sri Rama Namala, Lu Tong, Kristopher Kopel, Sheng-Huang Lee, Chang H. Siau
  • Publication number: 20220068325
    Abstract: Memory having an array of memory cells and a plurality of access lines each connected to a respective plurality of memory cells of the array of memory cells might include a controller configured to cause the memory to apply a respective programming pulse having a first target voltage level and a first pulse width to each access line of a first subset of access lines of the plurality of access lines, and apply a respective programming pulse having the first target voltage level and a second pulse width longer than the first pulse width to each access line of a second subset of access lines of the plurality of access lines, wherein each access line of the first subset of access lines is nearer a particular end of the string of series-connected memory cells than each access line of the second subset of access lines.
    Type: Application
    Filed: September 28, 2020
    Publication date: March 3, 2022
    Applicant: MICRON TECHNOLOGY, INC.
    Inventors: Chang H. Siau, Michele Piccardi, Qui V. Nguyen