Patents by Inventor Chang Wan Ha

Chang Wan Ha 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).

  • Publication number: 20110292732
    Abstract: A NAND Flash memory device reduces circuitry noise during program operations. The memory includes bit lines that are electrically coupled together to charge share their respective voltage potentials prior to performing a discharge operation on the bit lines. A NAND flash cell is programmed by coupling a first memory array bit line to a program voltage to program the memory cell, biasing a second memory array bit line to a ground potential, wherein the second memory array bit line is located adjacent to the first memory array bit line, activating at least one first transistor to electrically coupling the first and second memory array bit lines together, and activating at least one second transistor to electrically couple the first and second memory array bit lines to a discharge potential.
    Type: Application
    Filed: August 5, 2011
    Publication date: December 1, 2011
    Inventor: Chang Wan Ha
  • Publication number: 20110280078
    Abstract: A charge pump in a memory device is activated to produce a programming voltage prior to data loading during a programming operation. During an initial programming cycle, first and second load voltages are charged from the charge pump. The first load is removed from the charge pump during a verify operation. The first load voltage is subsequently recharged by charge sharing from the second load voltage so that the charge pump is not initially necessary for recharging the first load voltage.
    Type: Application
    Filed: July 20, 2011
    Publication date: November 17, 2011
    Inventor: Chang Wan HA
  • Patent number: 8018770
    Abstract: Methods for programming and sensing in a memory device, a data cache, and a memory device are disclosed. In one such method, all of the bit lines of a memory block are programmed or sensed during the same program or sense operation by alternately multiplexing the odd or even page bit lines to the dynamic data cache. The dynamic data cache is comprised of dual SDC, PDC, DDC1, and DDC2 circuits such that one set of circuits is coupled to the odd page bit lines and the other set of circuits is coupled to the even page bit lines.
    Type: Grant
    Filed: November 20, 2008
    Date of Patent: September 13, 2011
    Assignee: Micron Technology, Inc.
    Inventor: Chang Wan Ha
  • Patent number: 8000152
    Abstract: A charge pump in a memory device is activated to produce a programming voltage prior to data loading during a programming operation. During an initial programming cycle, first and second load voltages are charged from the charge pump. The first load is removed from the charge pump during a verify operation. The first load voltage is subsequently recharged by charge sharing from the second load voltage so that the charge pump is not initially necessary for recharging the first load voltage.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: August 16, 2011
    Assignee: Micron Technology, Inc.
    Inventor: Chang Wan Ha
  • Patent number: 7995399
    Abstract: A NAND Flash memory device reduces circuitry noise during program operations. The memory includes bit lines that are electrically coupled together to charge share their respective voltage potentials prior to performing a discharge operation on the bit lines. A NAND flash cell is programmed by coupling a first memory array bit line to a program voltage to program the memory cell, biasing a second memory array bit line to a ground potential, wherein the second memory array bit line is located adjacent to the first memory array bit line, activating at least one first transistor to electrically coupling the first and second memory array bit lines together, and activating at least one second transistor to electrically couple the first and second memory array bit lines to a discharge potential.
    Type: Grant
    Filed: May 27, 2008
    Date of Patent: August 9, 2011
    Assignee: Micron Technology, Inc.
    Inventor: Chang Wan Ha
  • Publication number: 20110179218
    Abstract: A non-volatile memory device has a memory array comprising a plurality of memory cells. The array can operate in either a multilevel cell or single level cell mode and each cell has a lower page and an upper page of data. The memory device has a data latch for storing flag data and a cache latch coupled to the data latch. A read method comprises initiating a lower page read of a memory cell and reading, from the data latch, flag data that indicates whether a lower page read operation is necessary.
    Type: Application
    Filed: March 28, 2011
    Publication date: July 21, 2011
    Inventor: Chang Wan Ha
  • Publication number: 20110122699
    Abstract: Embodiments of the present invention disclosed herein include devices, systems and methods, such as those directed to non-volatile memory devices and systems capable of determining a degradation parameter associated with one or more memory cells. Disclosed devices and systems according to embodiments of the present invention include those that utilize the degradation parameter to adjust control signals coupled to the memory cells.
    Type: Application
    Filed: January 27, 2011
    Publication date: May 26, 2011
    Applicant: Micron Technology, Inc.
    Inventors: Chang Wan Ha, Ramin Ghodsi
  • Patent number: 7917685
    Abstract: A non-volatile memory device has a memory array comprising a plurality of memory cells. The array can operate in either a multilevel cell or single level cell mode and each cell has a lower page and an upper page of data. The memory device has a data latch for storing flag data and a cache latch coupled to the data latch. A read method comprises initiating a lower page read of a memory cell and reading, from the data latch, flag data that indicates whether a lower page read operation is necessary.
    Type: Grant
    Filed: May 4, 2006
    Date of Patent: March 29, 2011
    Assignee: Micron Technology, Inc.
    Inventor: Chang Wan Ha
  • Patent number: 7894264
    Abstract: Embodiments of the present invention disclosed herein include devices, systems and methods, such as those directed to non-volatile memory devices and systems capable of determining a degradation parameter associated with one or more memory cells. Disclosed devices and systems according to embodiments of the present invention include those that utilize the degradation parameter to adjust control signals coupled to the memory cells.
    Type: Grant
    Filed: November 7, 2007
    Date of Patent: February 22, 2011
    Assignee: Micron Technology, Inc.
    Inventors: Chang Wan Ha, Ramin Ghodsi
  • Patent number: 7876623
    Abstract: A non-volatile memory device and programming process is described that increases the programming voltage of successive programming cycles in relation to the percentage of the data bits that failed programming verification during the previous programming cycle and were not correctly programmed into the memory array. This allows for a faster on average program operation and a more accurate match of the subsequent increase in the programming voltage to the non-volatile memory device, the specific region or row being programmed and any changes due to device wear. In one embodiment of the present invention the manufacturing process/design and/or specific memory device is characterized by generating a failed bit percentage to programming voltage increase profile to set the desired programming voltage delta/increase. In another embodiment of the present invention, methods and apparatus are related for the programming of data into non-volatile memory devices and, in particular, NAND and NOR architecture Flash memory.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: January 25, 2011
    Assignee: Micron Technology, Inc.
    Inventor: Chang Wan Ha
  • Publication number: 20100142283
    Abstract: A non-volatile memory device and programming process is described that increases the programming voltage of successive programming cycles in relation to the percentage of the data bits that failed programming verification during the previous programming cycle and were not correctly programmed into the memory array. This allows for a faster on average program operation and a more accurate match of the subsequent increase in the programming voltage to the non-volatile memory device, the specific region or row being programmed and any changes due to device wear. In one embodiment of the present invention the manufacturing process/design and/or specific memory device is characterized by generating a failed bit percentage to programming voltage increase profile to set the desired programming voltage delta/increase. In another embodiment of the present invention, methods and apparatus are related for the programming of data into non-volatile memory devices and, in particular, NAND and NOR architecture Flash memory.
    Type: Application
    Filed: February 16, 2010
    Publication date: June 10, 2010
    Inventor: Chang Wan Ha
  • Publication number: 20100124115
    Abstract: Methods for programming and sensing in a memory device, a data cache, and a memory device are disclosed. In one such method, all of the bit lines of a memory block are programmed or sensed during the same program or sense operation by alternately multiplexing the odd or even page bit lines to the dynamic data cache. The dynamic data cache is comprised of dual SDC, PDC, DDC1, and DDC2 circuits such that one set of circuits is coupled to the odd page bit lines and the other set of circuits is coupled to the even page bit lines.
    Type: Application
    Filed: November 20, 2008
    Publication date: May 20, 2010
    Inventor: Chang Wan Ha
  • Publication number: 20100074020
    Abstract: A charge pump in a memory device is activated to produce a programming voltage prior to data loading during a programming operation. During an initial programming cycle, first and second load voltages are charged from the charge pump. The first load is removed from the charge pump during a verify operation. The first load voltage is subsequently recharged by charge sharing from the second load voltage so that the charge pump is not initially necessary for recharging the first load voltage.
    Type: Application
    Filed: November 30, 2009
    Publication date: March 25, 2010
    Inventor: Chang Wan Ha
  • Patent number: 7663934
    Abstract: A non-volatile memory device and programming process is described that increases the programming voltage of successive programming cycles in relation to the percentage of the data bits that failed programming verification during the previous programming cycle and were not correctly programmed into the memory array. This allows for a faster on average program operation and a more accurate match of the subsequent increase in the programming voltage to the non-volatile memory device, the specific region or row being programmed and any changes due to device wear. In one embodiment of the present invention the manufacturing process/design and/or specific memory device is characterized by generating a failed bit percentage to programming voltage increase profile to set the desired programming voltage delta/increase. In another embodiment of the present invention, methods and apparatus are related for the programming of data into non-volatile memory devices and, in particular, NAND and NOR architecture Flash memory.
    Type: Grant
    Filed: November 17, 2008
    Date of Patent: February 16, 2010
    Assignee: Micron Technology, Inc.
    Inventor: Chang Wan Ha
  • Patent number: 7626865
    Abstract: A charge pump in a memory device is activated to produce a programming voltage prior to data loading during a programming operation. During an initial programming cycle, first and second load voltages are charged from the charge pump. The first load is removed from the charge pump during a verify operation. The first load voltage is subsequently recharged by charge sharing from the second load voltage so that the charge pump is not initially necessary for recharging the first load voltage.
    Type: Grant
    Filed: June 13, 2006
    Date of Patent: December 1, 2009
    Assignee: Micron Technology, Inc.
    Inventor: Chang Wan Ha
  • Patent number: 7613070
    Abstract: System and method for latching input signals from multiplexed signal lines. An input signal path includes a command path and an address path. In one embodiment, a command latch of the command path latches commands from the input signals and the address path includes a plurality of address latches that latch addresses from the input signals in an interleaved manner. In another embodiment, the command path includes a plurality of command latches that latch commands from the input signals in an interleaved manner and the address path includes a plurality of address latches that latch addresses from the input signals in an interleaved manner.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: November 3, 2009
    Assignee: Micron Technology, Inc.
    Inventor: Chang Wan Ha
  • Publication number: 20090116283
    Abstract: Embodiments of the present invention disclosed herein include devices, systems and methods, such as those directed to non-volatile memory devices and systems capable of determining a degradation parameter associated with one or more memory cells. Disclosed devices and systems according to embodiments of the present invention include those that utilize the degradation parameter to adjust control signals coupled to the memory cells.
    Type: Application
    Filed: November 7, 2007
    Publication date: May 7, 2009
    Applicant: Micron Technology, Inc.
    Inventors: Chang Wan Ha, Ramin Ghodsi
  • Publication number: 20090097331
    Abstract: System and method for latching input signals from multiplexed signal lines. An input signal path includes a command path and an address path. In one embodiment, a command latch of the command path latches commands from the input signals and the address path includes a plurality of address latches that latch addresses from the input signals in an interleaved manner. In another embodiment, the command path includes a plurality of command latches that latch commands from the input signals in an interleaved manner and the address path includes a plurality of address latches that latch addresses from the input signals in an interleaved manner.
    Type: Application
    Filed: December 16, 2008
    Publication date: April 16, 2009
    Inventor: Chang Wan Ha
  • Publication number: 20090073772
    Abstract: A non-volatile memory device and programming process is described that increases the programming voltage of successive programming cycles in relation to the percentage of the data bits that failed programming verification during the previous programming cycle and were not correctly programmed into the memory array. This allows for a faster on average program operation and a more accurate match of the subsequent increase in the programming voltage to the non-volatile memory device, the specific region or row being programmed and any changes due to device wear. In one embodiment of the present invention the manufacturing process/design and/or specific memory device is characterized by generating a failed bit percentage to programming voltage increase profile to set the desired programming voltage delta/increase. In another embodiment of the present invention, methods and apparatus are related for the programming of data into non-volatile memory devices and, in particular, NAND and NOR architecture Flash memory.
    Type: Application
    Filed: November 17, 2008
    Publication date: March 19, 2009
    Inventor: Chang Wan Ha
  • Patent number: 7486566
    Abstract: Various embodiments include a circuit to receive data information, a memory array including memory cells coupled to a bit line, and control circuitry to charge the bit line while the data information is received at the circuit. The control circuitry may program the data information into a selected memory cell of the memory cells after the data information is received at the circuit. Other embodiments including additional methods, apparatus, and systems are disclosed.
    Type: Grant
    Filed: December 28, 2006
    Date of Patent: February 3, 2009
    Assignee: Intel Corporation
    Inventor: Chang Wan Ha