Patents by Inventor Cheong Min Hong

Cheong Min Hong 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: 20150001606
    Abstract: A method of forming a split gate memory cell structure using a substrate includes forming a gate stack comprising a select gate and a dielectric portion overlying the select gate. A charge storage layer is formed over the substrate including over the gate stack. A first sidewall spacer of conductive material is formed along a first sidewall of the gate stack extending past a top of the select gate. A second sidewall spacer of dielectric material is formed along the first sidewall on the first sidewall spacer. A portion of the first sidewall spacer is silicided using the second sidewall spacer as a mask whereby silicide does not extend to the charge storage layer.
    Type: Application
    Filed: June 28, 2013
    Publication date: January 1, 2015
    Inventors: Cheong Min Hong, Sung-Taeg Kang
  • Publication number: 20150001612
    Abstract: A method of making a semiconductor structure includes forming a select gate stack on a substrate. The substrate includes a non-volatile memory (NVM) region and a high voltage region. The select gate stack is formed in the NVM region. A charge storage layer is formed over the NVM region and the high voltage region of the substrate. The charge storage layer includes charge storage material between a bottom layer of dielectric material and a top layer of dielectric material. The charge storage material in the high voltage region is oxidized while the charge storage material in the NVM region remains unoxidized.
    Type: Application
    Filed: June 27, 2013
    Publication date: January 1, 2015
    Inventors: CHEONG MIN HONG, SUNG-TAEG KANG, JANE A. YATER
  • Patent number: 8921155
    Abstract: A resistive random access memory cell uses a substrate and includes a gate stack over the substrate. The gate stack includes a first copper layer over the substrate, a copper oxide layer over the first copper layer, and a second copper layer over the copper oxide layer.
    Type: Grant
    Filed: April 12, 2011
    Date of Patent: December 30, 2014
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Feng Zhou, Ko-Min Chang, Cheong Min Hong
  • Patent number: 8901632
    Abstract: A method of making a semiconductor structure includes forming a select gate over a substrate in an NVM region and a first protection layer over a logic region. A control gate and a storage layer are formed over the substrate in the NVM region. The control gate has a top surface below a top surface of the select gate. The charge storage layer is under the control gate, along adjacent sidewalls of the select gate and control gate, and is partially over the top surface of the select gate. A second protection layer is formed over the NVM portion and the logic portion. The first and second protection layers are removed from the logic region. A portion of the second protection layer is left over the control gate and the select gate. A gate structure, formed over the logic region, has a high k dielectric and a metal gate.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: December 2, 2014
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Asanga H. Perera, Cheong Min Hong, Sung-Taeg Kang, Byoung W. Min, Jane A. Yater
  • Patent number: 8877585
    Abstract: A method of making a semiconductor structure using a substrate having a non-volatile memory (NVM) portion, a first high voltage portion, a second high voltage portion and a logic portion, includes forming a first conductive layer over an oxide layer on a major surface of the substrate in the NVM portion, the first and second high voltage portions, and logic portion. A memory cell is fabricated in the NVM portion while the first conductive layer remains in the first and second high voltage portions and the logic portion. The first conductive layer is patterned to form transistor gates in the first and second high voltage portions. A protective mask is formed over the NVM portion and the first and second high voltage portions. A transistor gate is formed in the logic portion while the protective mask remains in the NVM portion and the first and second high voltage portions.
    Type: Grant
    Filed: August 16, 2013
    Date of Patent: November 4, 2014
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Asanga H. Perera, Cheong Min Hong, Sung-Taeg Kang
  • Publication number: 20140321213
    Abstract: A non-volatile memory (NVM) system has a normal mode, a standby mode and an off mode that uses less power than the standby mode. The NVM system includes an NVM array that includes NVM cells and NVM peripheral circuitry. Each NVM cell includes a control gate. A controller is coupled to the NVM array, applies a voltage to the control gates and power to the peripheral circuitry during the standby mode, and applies an off-mode voltage to the control gates and removes power from the NVM peripheral circuitry during the off mode.
    Type: Application
    Filed: April 30, 2013
    Publication date: October 30, 2014
    Inventors: CHEONG MIN HONG, Horacio P. Gasquet, Ronald J. Syzdek
  • Publication number: 20140319593
    Abstract: A split gate memory array includes a first row having memory cells; a second row having memory cells, wherein the second row is adjacent to the first row; and a plurality of segments. Each segment includes a first plurality of memory cells of the first row, a second plurality of memory cells of the second row, a first control gate portion which forms a control gate of each memory cell of the first plurality of memory cells, and a second control gate portion which forms a control gate of each memory cell of the second plurality of memory cells. The first control gate portion and the second control gate portion converge to a single control gate portion between neighboring segments of the plurality of segments.
    Type: Application
    Filed: April 30, 2013
    Publication date: October 30, 2014
    Inventors: Jane A. YATER, Cheong Min HONG, Sung-Taeg KANG, Ronald J. SYZDEK
  • Patent number: 8860001
    Abstract: A resistive random access memory (ReRAM) includes a first metal layer having a first metal and a metal-oxide layer on the first metal layer. The metal-oxide layer inlcudes the first metal. The ReRAM further includes a second metal layer over the metal-oxide layer and a first continuous conductive barrier layer in physical contact with sidewalls of the first metal layer and of the metal-oxide layer.
    Type: Grant
    Filed: April 9, 2012
    Date of Patent: October 14, 2014
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Cheong Min Hong, Ko-Min Chang, Feng Zhou
  • Patent number: 8853027
    Abstract: In one aspect, a disclosed method of fabricating a split gate memory device includes forming a gate dielectric layer overlying an channel region of a semiconductor substrate and forming an electrically conductive select gate overlying the gate dielectric layer. The method further includes forming a counter doping region in an upper region of the substrate. A proximal boundary of the counter doping region is laterally displaced from a proximal sidewall of the select gate. The method further includes forming a charge storage layer comprising a vertical portion adjacent to the proximal sidewall of the select gate and a lateral portion overlying the counter doping region and forming an electrically conductive control gate adjacent to the vertical portion of the charge storage layer and overlying the horizontal portion of the charge storage layer.
    Type: Grant
    Filed: October 1, 2012
    Date of Patent: October 7, 2014
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Cheong Min Hong, Sung-Taeg Kang
  • Publication number: 20140295639
    Abstract: A resistive random access memory (ReRAM) cell comprising a first conductive electrode and a dielectric storage material layer over the first conductive electrode. The dielectric storage material layer is conducive to the formation of conductive filaments during the application of a filament forming voltage to the cell. The cell includes a second conductive electrode over the dielectric storage material layer and a layer of conductive nanoclusters (911, 1211) including a plurality of nanoclusters in contact with the dielectric storage material layer and in contact with the first conductive electrode or the second conductive electrode.
    Type: Application
    Filed: June 11, 2014
    Publication date: October 2, 2014
    Applicant: FREESCALE SEMICONDUCTOR, INC.
    Inventors: FENG ZHOU, Frank K. Baker, JR., Ko-Min Chang, Cheong Min Hong
  • Publication number: 20140239372
    Abstract: A split gate memory structure includes a pillar of active region having a first source/drain region disposed at a first end of the pillar, a second source/drain region disposed at a second end of the pillar, opposite the first end, and a channel region between the first and second source/drain regions. The pillar has a major surface extending between first and the second ends which exposes the first source/drain region, the channel region, and the second source/drain region. A select gate is adjacent the first source/drain region and a first portion of the channel region, wherein the select gate encircles the major surface the pillar. A charge storage layer is adjacent the second source/drain region and a second portion of the channel region, wherein the charge storage layer encircles the major surface the pillar. A control gate is adjacent the charge storage layer, wherein the control gate encircles the pillar.
    Type: Application
    Filed: February 28, 2013
    Publication date: August 28, 2014
    Inventors: SUNG-TAEG KANG, CHEONG MIN HONG
  • Publication number: 20140209995
    Abstract: Non-volatile memory (NVM) cells having carbon impurities are disclosed along with related manufacturing methods. The carbon impurities can be introduced using a variety of techniques, including through epitaxial growth of silicon-carbon (SiC) layers and/or carbon implants. Further, the carbon impurities can be introduced into one or more structures within NVM cells, including source regions, drain regions, gate regions, and/or charge storage layers. For discrete charge storage layers that utilize nanocrystal structures, carbon impurities can be introduced into the nanocrystal charge storage layers. The disclosed embodiments are useful for a variety of NVM cell types including split-gate NVM cells, floating gate NVM cells, discrete charge storage NVM cells, and/or other desired NVM cells. Advantageously, the carbon impurities introduce tensile stress into the cell structures, and this tensile stress helps maintain NVM system performance and data retention even as device geometries are reduced.
    Type: Application
    Filed: January 29, 2013
    Publication date: July 31, 2014
    Inventors: Cheong Min Hong, Sung-Taeg Kang
  • Patent number: 8779405
    Abstract: A resistive random access memory (ReRAM) cell comprising a first conductive electrode and a dielectric storage material layer over the first conductive electrode. The dielectric storage material layer is conducive to the formation of conductive filaments during the application of a filament forming voltage to the cell. The cell includes a second conductive electrode over the dielectric storage material layer and a layer of conductive nanoclusters (911, 1211) including a plurality of nanoclusters in contact with the dielectric storage material layer and in contact with the first conductive electrode or the second conductive electrode.
    Type: Grant
    Filed: June 1, 2012
    Date of Patent: July 15, 2014
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Feng Zhou, Frank K. Baker, Jr., Ko-Min Chang, Cheong Min Hong
  • Publication number: 20140091380
    Abstract: In one aspect, a disclosed method of fabricating a split gate memory device includes forming a gate dielectric layer overlying an channel region of a semiconductor substrate and forming an electrically conductive select gate overlying the gate dielectric layer. The method further includes forming a counter doping region in an upper region of the substrate. A proximal boundary of the counter doping region is laterally displaced from a proximal sidewall of the select gate. The method further includes forming a charge storage layer comprising a vertical portion adjacent to the proximal sidewall of the select gate and a lateral portion overlying the counter doping region and forming an electrically conductive control gate adjacent to the vertical portion of the charge storage layer and overlying the horizontal portion of the charge storage layer.
    Type: Application
    Filed: October 1, 2012
    Publication date: April 3, 2014
    Applicant: FREESCALE SEMICONDUCTOR, INC.
    Inventors: Cheong Min Hong, Sung-Taeg Kang
  • Publication number: 20140036568
    Abstract: A resistive random access memory (ReRAM) device can comprise a first metal layer and a first metal-oxide layer on the first metal layer. The first metal-oxide layer comprises the first metal. A second metal layer can comprise a second metal over and in physical contact with the first metal-oxide layer. A first continuous non-conductive barrier layer can be in physical contact with sidewalls of the first metal layer and sidewalls of the first metal-oxide layer. A second metal-oxide layer can be on the second metal layer. The second metal-oxide layer can comprise the second metal layer. A third metal layer can be over and in physical contact with the second metal-oxide layer. The first and second metal-oxide layers, are further characterized as independent storage mediums.
    Type: Application
    Filed: July 31, 2012
    Publication date: February 6, 2014
    Inventors: CHEONG MIN HONG, Feng Zhou
  • Publication number: 20140003155
    Abstract: A method for programming a split gate memory cell includes performing a first programming of the split gate memory cell in a first programming cycle of the split gate memory cell; and, subsequent to the performing the first programming of the split gate memory cell, performing a second programming of the split gate memory cell in the first programming cycle, wherein the first programming is characterized as one of source-side injection (SSI) programming and channel-initiated secondary electron (CHISEL) programming, and the second programming is characterized as the other of SSI programming and CHISEL programming.
    Type: Application
    Filed: June 28, 2012
    Publication date: January 2, 2014
    Inventors: CHEONG MIN HONG, Sung-Taeg Kang
  • Publication number: 20130320284
    Abstract: A resistive random access memory (ReRAM) cell, comprising a first conductive electrode and a dielectric storage material layer over the first conductive electrode. The dielectric storage material layer is conducive to the formation of conductive filaments during the application of a filament forming voltage to the cell. The cell includes a second conductive electrode over the dielectric storage material layer and an interface region comprising a plurality of interspersed field focusing features that are not photo-lithographically defined. The interface region is located between the first conductive electrode and the dielectric storage material layer or between the dielectric storage material layer and the second conductive electrode.
    Type: Application
    Filed: June 1, 2012
    Publication date: December 5, 2013
    Inventors: Feng Zhou, Frank K. Baker, JR., Ko-Min Chang, Cheong Min Hong
  • Publication number: 20130320285
    Abstract: A resistive random access memory (ReRAM) cell comprising a first conductive electrode and a dielectric storage material layer over the first conductive electrode. The dielectric storage material layer is conducive to the formation of conductive filaments during the application of a filament forming voltage to the cell. The cell includes a second conductive electrode over the dielectric storage material layer and a layer of conductive nanoclusters (911, 1211) including a plurality of nanoclusters in contact with the dielectric storage material layer and in contact with the first conductive electrode or the second conductive electrode.
    Type: Application
    Filed: June 1, 2012
    Publication date: December 5, 2013
    Inventors: Feng Zhou, Frank K. Baker, JR., Ko-Min Chang, Cheong Min Hong
  • Publication number: 20130264533
    Abstract: A resistive random access memory (ReRAM) includes a first metal layer having a first metal and a metal-oxide layer on the first metal layer. The metal-oxide layer inlcudes the first metal. The ReRAM further includes a second metal layer over the metal-oxide layer and a first continuous conductive barrier layer in physical contact with sidewalls of the first metal layer and of the metal-oxide layer.
    Type: Application
    Filed: April 9, 2012
    Publication date: October 10, 2013
    Inventors: CHEONG Min HONG, Ko-Min Chang, Feng Zhou
  • Patent number: 8530950
    Abstract: A split gate memory cell comprising a substrate including semiconductor material and a first gate structure of the memory cell located over the substrate. The first gate structure includes a first side wall having a lower portion and an upper portion. The upper portion is inset from the lower portion. A charge storage structure of the memory cell is located laterally to the first side wall. A second gate structure is located over the substrate and over at least a portion of the charge storage structure. The second gate structure is located laterally to the first gate structure such that the first side wall is located between the first gate structure and the second gate structure. A dielectric structure located against the upper portion of the first side wall and has a portion located over the lower portion of the first side wall.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: September 10, 2013
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Sung-Taeg Kang, Cheong Min Hong