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: 20140149786
    Abstract: Subject matter described pertains to apparatuses and methods for operating a memory device.
    Type: Application
    Filed: February 3, 2014
    Publication date: May 29, 2014
    Applicant: Micron Technology, Inc.
    Inventor: Chang Wan Ha
  • Publication number: 20140138840
    Abstract: Apparatuses and methods for stair step formation using at least two masks, such as in a memory device, are provided. One example method can include forming a first mask over a conductive material to define a first exposed area, and forming a second mask over a portion of the first exposed area to define a second exposed area, the second exposed area is less than the first exposed area. Conductive material is removed from the second exposed area. An initial first dimension of the second mask is less than a first dimension of the first exposed area and an initial second dimension of the second mask is at least a second dimension of the first exposed area plus a distance equal to a difference between the initial first dimension of the second mask and a final first dimension of the second mask after a stair step structure is formed.
    Type: Application
    Filed: November 20, 2013
    Publication date: May 22, 2014
    Applicant: MICRON TECHNOLOGY, INC.
    Inventors: Chang Wan Ha, Graham R. Wolstenholme, Deepak Thimmegowda
  • Patent number: 8711633
    Abstract: Examples described include dynamic data caches (DDCs), decoders and decoding methods that may fit into a smaller width area. The DDCs, decoders and decoding method may be used in flash memory devices. A single column select line may be provided to select a plurality of cached bytes, while a second select line selects a byte of the selected plurality. The column select line may be routed parallel to bit lines carrying data, while the second select line may be routed perpendicular to the bit lines.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: April 29, 2014
    Assignee: Micron Technology, Inc.
    Inventor: Chang Wan Ha
  • Publication number: 20140078836
    Abstract: Methods, memories and systems may include charging a sense node to a logic high voltage level, and supplying charge to a bit line and to a reference bit line for a precharge period that is based, at least in part, on a time for a voltage of the reference bit line to reach a reference voltage. A memory cell that is coupled to the bit line may be selected after the precharge period, and a clamp voltage may be set based, at least in part, on the voltage of the reference bit line. If a voltage level of the bit line is less than the clamp voltage level during a sense period, charge may be drained from the sense node, and a state of the memory cell may be determined based, at least in part, on a voltage level of the sense node near an end of the sense period.
    Type: Application
    Filed: September 17, 2012
    Publication date: March 20, 2014
    Inventor: Chang Wan Ha
  • Patent number: 8656092
    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: February 8, 2013
    Date of Patent: February 18, 2014
    Assignee: Micron Technology, Inc.
    Inventor: Chang Wan Ha
  • Patent number: 8645752
    Abstract: Subject matter described pertains to apparatuses and methods for operating a memory device.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: February 4, 2014
    Assignee: Micron Technology, Inc.
    Inventor: Chang Wan Ha
  • Publication number: 20140008806
    Abstract: Apparatuses and methods for stair step formation using at least two masks, such as in a memory device, are provided. One example method can include forming a first mask over a conductive material to define a first exposed area, and forming a second mask over a portion of the first exposed area to define a second exposed area, the second exposed area is less than the first exposed area. Conductive material is removed from the second exposed area. An initial first dimension of the second mask is less than a first dimension of the first exposed area and an initial second dimension of the second mask is at least a second dimension of the first exposed area plus a distance equal to a difference between the initial first dimension of the second mask and a final first dimension of the second mask after a stair step structure is formed.
    Type: Application
    Filed: July 6, 2012
    Publication date: January 9, 2014
    Applicant: MICRON TECHNOLOGY, INC.
    Inventors: Chang Wan Ha, Graham R. Wolstenholme, Deepak Thimmegowda
  • Patent number: 8609536
    Abstract: Apparatuses and methods for stair step formation using at least two masks, such as in a memory device, are provided. One example method can include forming a first mask over a conductive material to define a first exposed area, and forming a second mask over a portion of the first exposed area to define a second exposed area, the second exposed area is less than the first exposed area. Conductive material is removed from the second exposed area. An initial first dimension of the second mask is less than a first dimension of the first exposed area and an initial second dimension of the second mask is at least a second dimension of the first exposed area plus a distance equal to a difference between the initial first dimension of the second mask and a final first dimension of the second mask after a stair step structure is formed.
    Type: Grant
    Filed: July 6, 2012
    Date of Patent: December 17, 2013
    Assignee: Micron Technology, Inc.
    Inventors: Chang Wan Ha, Graham R. Wolstenholme, Deepak Thimmegowda
  • Publication number: 20130292496
    Abstract: Disclosed is a micro flow control injector for use in an ultramicro mono-propellant based pneumatic generator, including: a first check valve installed on a first supply pipe connected to a fuel tank charged with a mono-propellant and preventing a flow from the first supply pipe to the fuel tank; a small-sized driver connected with the first supply pipe and minutely controlling the supplied flow while repeatedly generating a decompression state and a pressurization state in the first supply pipe by a reciprocating movement; a second supply pipe connected to a cylinder of the small-sized driver to discharge fuel to a reactor in a pressurization state; and a second check valve installed on the second supply pipe and preventing a flow from the second supply pipe to the small-sized driver and the first supply pipe, in order to minutely control a flow.
    Type: Application
    Filed: June 6, 2012
    Publication date: November 7, 2013
    Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Kyung-Soo Kim, Soohyun Kim, Kyungrok Kim, Young June Shin, Chang Wan Ha, Jonghyun Lee
  • Patent number: 8547754
    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: May 15, 2012
    Date of Patent: October 1, 2013
    Assignee: Micron Technology, Inc.
    Inventor: Chang Wan Ha
  • Publication number: 20130117604
    Abstract: Subject matter described pertains to apparatuses and methods for operating a memory device.
    Type: Application
    Filed: November 8, 2011
    Publication date: May 9, 2013
    Applicant: Micron Technology, Inc.
    Inventor: Chang Wan Ha
  • Patent number: 8400840
    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: August 5, 2011
    Date of Patent: March 19, 2013
    Assignee: Micron Technology, Inc.
    Inventor: Chang Wan Ha
  • Patent number: 8379461
    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 comprises 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: August 11, 2011
    Date of Patent: February 19, 2013
    Assignee: Micron Technology, Inc.
    Inventor: Chang Wan Ha
  • Patent number: 8375179
    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: March 28, 2011
    Date of Patent: February 12, 2013
    Assignee: Micron Technology, Inc.
    Inventor: Chang Wan Ha
  • Patent number: 8320183
    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: January 27, 2011
    Date of Patent: November 27, 2012
    Assignee: Micron Technology, Inc.
    Inventors: Chang Wan Ha, Ramin Ghodsi
  • Publication number: 20120287722
    Abstract: Examples described include dynamic data caches (DDCs), decoders and decoding methods that may fit into a smaller width area. The DDCs, decoders and decoding method may be used in flash memory devices. A single column select line may be provided to select a plurality of cached bytes, while a second select line selects a byte of the selected plurality. The column select line may be routed parallel to bit lines carrying data, while the second select line may be routed perpendicular to the bit lines.
    Type: Application
    Filed: May 12, 2011
    Publication date: November 15, 2012
    Applicant: Micron Technology, Inc.
    Inventor: Chang Wan Ha
  • Patent number: 8287670
    Abstract: Disclosed is an electronic component bonding method which interposes a bonding resin between first and second electronic components to bond the first and second electronic components to each other. The electronic component bonding method includes providing the bonding resin between the first and second electronic components, aligning the first and second electronic components with each other, pre-curing the bonding resin to generate elasticity in the bonding resin, performing a main curing operation to apply vibration energy to the bonding resin, which has elasticity according to pre-curing, to securely fix the first and second electronic component to each other, and control the amplitude of the vibration energy applied during the main curing operation to be restricted within an elastic region of the bonding resin.
    Type: Grant
    Filed: February 8, 2010
    Date of Patent: October 16, 2012
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Kyung-Soo Kim, Taeyoung Jang, Chang-Wan Ha
  • Publication number: 20120224428
    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: May 15, 2012
    Publication date: September 6, 2012
    Inventor: Chang Wan Ha
  • Patent number: 8194466
    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: July 20, 2011
    Date of Patent: June 5, 2012
    Assignee: Micron Technology, Inc.
    Inventor: Chang Wan Ha
  • Publication number: 20110296093
    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 comprises 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: August 11, 2011
    Publication date: December 1, 2011
    Inventor: Chang Wan HA