Patents by Inventor Kuo-Tung Chang

Kuo-Tung Chang 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: 20160111292
    Abstract: Semiconductor devices and methods of manufacturing such devices are described herein. According to embodiments, the semiconductor device can be made by forming a dielectric layer at a first region and at a second region of a semiconductor substrate. A gate conductor layer is disposed over the dielectric formed in the first and the second regions of the semiconductor substrate, and the second region is masked. A split gate memory cell is formed in the first region of the semiconductor substrate with a first gate length. The first region is then masked, and the second region is etched to define a logic gate that has a second gate length. The first and second gate lengths can be different.
    Type: Application
    Filed: December 16, 2015
    Publication date: April 21, 2016
    Applicant: Cypress Semiconductor Corporation
    Inventors: Mark RAMSBEY, Chun CHEN, Sameer HADDAD, Kuo Tung CHANG, Unsoon KIM, Shenqing FANG, Yu SUN, Calvin GABRIEL
  • Patent number: 9276007
    Abstract: A method for fabricating a memory device with a self-aligned trap layer and rounded active region corners is disclosed. In the present invention, an STI process is performed before any of the charge-trapping and top-level layers are formed. Immediately after the STI process, the sharp corners of the active regions are exposed. Because these sharp corners are exposed at this time, they are available to be rounded through any number of known rounding techniques. Rounding the corners improves the performance characteristics of the memory device. Subsequent to the rounding process, the charge-trapping structure and other layers can be formed by a self-aligned process.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: March 1, 2016
    Assignee: Cypress Semiconductor Corporation
    Inventors: Tim Thurgate, Shenqing Fang, Kuo-Tung Chang, YouSeok Suh, Meng Ding, Hidehiko Shiraiwa, Amol Joshi, Hapreet Sachar, David Matsumoto, Lovejeet Singh, Chih-Yuh Yang
  • Patent number: 9245895
    Abstract: Memory devices having improved TPD characteristics and methods of making the memory devices are provided. The memory devices contain two or more memory cells on a semiconductor substrate and bit line openings containing a bit line dielectric between the memory cells. The memory cell contains a charge storage layer and a first poly gate. The bit line opening extends into the semiconductor substrate. By containing the bit line dielectric in the bit line openings that extend into the semiconductor substrate, the memory device can improve the electrical isolation between memory cells, thereby preventing and/or mitigating TPD.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: January 26, 2016
    Assignee: Cypress Semiconductor Corporation
    Inventors: Ning Cheng, Kuo-Tung Chang, Hiro Kinoshita, Chih-Yuh Yang, Lei Xue, Chungho Lee, Minghao Shen, Angela Hui, Huaqiang Wu
  • Publication number: 20150333188
    Abstract: A semiconductor device having a substrate, a dielectric layer, a polycrystalline silicon (“poly”) resistor, a drain, and a source is disclosed. After implantation, the poly resistor may have a lateral doping profile with two peaks, one near each edge of the poly resistor, and a trough near the middle of the poly resistor. Such a doping profile can allow the poly resistor to have a resistance that is insensitive to small variations in critical dimension of the poly resistor. The resistance of the poly resistor may be determined by the doping dose of the tilted implant used to form the poly resistor. The tilted implant may be used to form the drain and the source of a transistor substantially simultaneously as forming the poly resistor.
    Type: Application
    Filed: May 15, 2014
    Publication date: November 19, 2015
    Applicant: Spansion LLC
    Inventors: Shenqing FANG, Timothy Thurgate, Kuo Tung Chang
  • Patent number: 9190531
    Abstract: An embodiment of the present invention is directed to a method of forming a memory cell. The method includes etching a trench in a substrate and filling the trench with an oxide to form a shallow trench isolation (STI) region. A portion of an active region of the substrate that comes in contact with the STI region forms a bitline-STI edge. The method further includes forming a gate structure over the active region of the substrate and over the STI region. The gate structure has a first width substantially over the center of the active region of the substrate and a second width substantially over the bitline-STI edge, and the second width is greater than the first width.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: November 17, 2015
    Assignee: CYPRESS SEMICONDUCTOR CORPORATION
    Inventors: Meng Ding, YouSeok Suh, Shenqing Fang, Kuo-Tung Chang
  • Patent number: 9153596
    Abstract: Semiconductor devices having reduced parasitic current and methods of malting the semiconductor devices are provided. Further provided are memory devices having reduced adjacent wordline disturb. The memory devices contain wordlines formed over a semiconductor substrate, wherein at least one wordline space is formed between the wordlines. Adjacent wordline disturb is reduced by implanting one or more of indium, boron, and a combination of boron and indium in the surface of the at least one wordline space.
    Type: Grant
    Filed: February 23, 2009
    Date of Patent: October 6, 2015
    Assignee: Cypress Semiconductor Corporation
    Inventors: Gulzar A. Kathawala, Zhizheng Liu, Kuo Tung Chang, Lei Xue
  • Publication number: 20150108562
    Abstract: A three-dimensional charge trap semiconductor device is constructed with alternating insulating and gate layers stacked over a substrate. During the manufacturing process, a channel hole is formed in the stack and the gate layers are recessed from the channel hole. Using the recessed topography of the gate layers, a charge trap layer can be deposited on the sidewalls of the channel hole and etched, leaving individual discrete charge trap layer sections in each recess. Filling the channel hole with channel material effectively provides a three-dimensional semiconductor device having individual charge trap layer sections for each memory cell.
    Type: Application
    Filed: October 17, 2013
    Publication date: April 23, 2015
    Applicant: Spansion LLC
    Inventors: Chun CHEN, Kuo-Tung CHANG, Shenqing FANG
  • Publication number: 20150031197
    Abstract: Semiconductor devices and the manufacture of such semiconductor devices are described. According to various aspects of the disclosure, a semiconductor device can include a memory region, a first logic region, and a second logic region. A select gate can be formed in the memory region of the device and a first logic gate formed in the logic region. A charge trapping dielectric can then be disposed and removed from a second logic region. A gate conductor layer can then be disposed on the device and etched to define a memory gate on the sidewall of the select gate and a second logic gate in the second logic region.
    Type: Application
    Filed: September 12, 2014
    Publication date: January 29, 2015
    Inventors: Kuo Tung Chang, Chun Chen, Shenqing Fang
  • Publication number: 20140312409
    Abstract: A method for fabricating a memory device with a self-aligned trap layer and rounded active region corners is disclosed. In the present invention, an STI process is performed before any of the charge-trapping and top-level layers are formed. Immediately after the STI process, the sharp corners of the active regions are exposed. Because these sharp corners are exposed at this time, they are available to be rounded through any number of known rounding techniques. Rounding the corners improves the performance characteristics of the memory device. Subsequent to the rounding process, the charge-trapping structure and other layers can be formed by a self-aligned process.
    Type: Application
    Filed: January 29, 2014
    Publication date: October 23, 2014
    Applicant: SPANSION LLC
    Inventors: Tim Thurgate, Shenqing Fang, Kuo-Tung Chang, YouSeok Suh, Meng Ding, Hidehiko Shiraiwa, Amol Joshi, Hapreet Sachar, David Matsumoto, Lovejeet Singh, Chih-Yuh Yang
  • Patent number: 8836006
    Abstract: Semiconductor devices and the manufacture of such semiconductor devices are described. According to various aspects of the disclosure, a semiconductor device can include a memory region, a first logic region, and a second logic region. A select gate can be formed in the memory region of the device and a first logic gate formed in the logic region. A charge trapping dielectric can then be disposed and removed from a second logic region. A gate conductor layer can then be disposed on the device and etched to define a memory gate on the sidewall of the select gate and a second logic gate in the second logic region.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: September 16, 2014
    Assignee: Spansion LLC
    Inventors: Kuo Tung Chang, Chun Chen, Shenqing Fang
  • Patent number: 8815727
    Abstract: A method for forming an integrated circuit system is provided including forming a semi-conducting layer over a substrate, forming a spacer stack having a gap filler adjacent to the semi-conducting layer and a inter-layer dielectric over the gap filler, forming a transition layer having a recess over the semi-conducting layer and adjacent to the spacer stack, and forming a metal layer in the recess.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: August 26, 2014
    Assignees: Advanced Micro Devices, Inc., Spansion LLC
    Inventors: Angela T. Hui, Mark S. Chang, Kuo-Tung Chang, Scott A. Bell
  • Patent number: 8816438
    Abstract: A semiconductor device and method of making such device is presented herein. The semiconductor device includes a plurality of memory cells, a plurality of p-n junctions, and a metal trace of a first metal layer. Each of the plurality of memory cells includes a first gate disposed over a first dielectric, a second gate disposed over a second dielectric and adjacent to a sidewall of the first gate, a first doped region in the substrate adjacent to the first gate, and a second doped region in the substrate adjacent to the second gate. The plurality of p-n junctions are electrically isolated from the doped regions of each memory cell. The metal trace extends along a single plane between a via to the second gate of at least one memory cell in the plurality of memory cells, and a via to a p-n junction within the plurality of p-n junctions.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: August 26, 2014
    Assignee: Spansion LLC
    Inventors: Chun Chen, Sameer Haddad, Kuo Tung Chang, Mark Ramsbey, Unsoon Kim, Shenqing Fang
  • Patent number: 8802537
    Abstract: A method for forming a memory device is provided. A nitride layer is formed over a substrate. The nitride layer and the substrate are etched to form a trench. The memory device is pre-cleaned to prepare a surface of the memory device for oxide formation thereon, where cleaning the memory device removes portions of the barrier oxide layer on opposite sides of the trench. The nitride layer is trimmed on opposite sides of the trench. A liner oxide layer is formed in the trench.
    Type: Grant
    Filed: July 27, 2005
    Date of Patent: August 12, 2014
    Assignee: Spansion LLC
    Inventors: Yider Wu, Unsoon Kim, Kuo-Tung Chang, Harpreet Sachar
  • Patent number: 8785268
    Abstract: A method for manufacturing a memory system is provided including forming a charge-storage layer on a first insulator layer including insulating the charge-storage layer from a vertical fin, forming a second insulator layer from the charge-storage layer, and forming a gate over the second insulator includes forming a fin field effect transistor.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: July 22, 2014
    Assignee: Spansion LLC
    Inventors: Wei Zheng, Lei Xue, Kuo-Tung Chang
  • Publication number: 20140167141
    Abstract: Semiconductor devices and methods of manufacturing such devices are described herein. According to embodiments, the semiconductor device can be made by forming an dielectric layer at a first region and at a second region of a semiconductor substrate. A gate conductor layer is disposed over the dielectric formed in the first and the second regions of the semiconductor substrate, and the second region is masked. A split gate memory cell is formed in the first region of the semiconductor substrate with a first gate length. The first region is then masked, and the second region is etched to define a logic gate that has a second gate length. The first and second gate lengths can be different.
    Type: Application
    Filed: December 14, 2012
    Publication date: June 19, 2014
    Applicant: Spansion LLC
    Inventors: Mark RAMSBEY, Chun CHEN, Sameer HADDAD, Kuo Tung CHANG, Unsoon KIM, Shenqing FANG, Yu SUN, Calvin GABRIEL
  • Publication number: 20140167135
    Abstract: A semiconductor device and method of making such device is presented herein. The semiconductor device includes a plurality of memory cells, a plurality of p-n junctions, and a metal trace of a first metal layer. Each of the plurality of memory cells includes a first gate disposed over a first dielectric, a second gate disposed over a second dielectric and adjacent to a sidewall of the first gate, a first doped region in the substrate adjacent to the first gate, and a second doped region in the substrate adjacent to the second gate. The plurality of p-n junctions are electrically isolated from the doped regions of each memory cell. The metal trace extends along a single plane between a via to the second gate of at least one memory cell in the plurality of memory cells, and a via to a p-n junction within the plurality of p-n junctions.
    Type: Application
    Filed: December 14, 2012
    Publication date: June 19, 2014
    Applicant: Spansion LLC
    Inventors: Chun CHEN, Sameer Haddad, Kuo Tung Chang, Mark Ramsbey, Unsoon Kim, Shenqing Fang
  • Publication number: 20140170843
    Abstract: Embodiments provide a split gate device, methods for fabricating a split gate device, and integrated methods for fabricating a split gate device and a periphery device. In an embodiment, the split gate device is a charge trapping split gate device, which includes a charge trapping layer. In another embodiment, the split gate device is a non-volatile memory cell, which can be formed according to embodiments as standalone or embedded with a periphery device.
    Type: Application
    Filed: December 14, 2012
    Publication date: June 19, 2014
    Applicant: Spansion LLC
    Inventors: Chun CHEN, Shenqing FANG, Unsoon KIM, Mark RAMSBEY, Kuo Tung CHANG, Sameer HADDAD
  • Publication number: 20140167220
    Abstract: Integrated capacitor structures and methods for fabricating same are provided. In an embodiment, the integrated capacitor structures exploit the capacitance that can be formed in a plane that is perpendicular to that of the substrate, resulting in three-dimensional capacitor structures. This allows for integrated capacitor structures with higher capacitance to be formed over relatively small substrate areas. Embodiments are suitable for use by charge pumps and can be fabricated to have more or less capacitance as desired by the application.
    Type: Application
    Filed: December 14, 2012
    Publication date: June 19, 2014
    Applicant: Spansion LLC
    Inventors: Mark RAMSBEY, Unsoon KIM, Shenqing FANG, Chun CHEN, Kuo Tung CHANG
  • Publication number: 20140167139
    Abstract: Semiconductor devices and the manufacture of such semiconductor devices are described. According to various aspects of the disclosure, a semiconductor device can include a memory region, a first logic region, and a second logic region. A select gate can be formed in the memory region of the device and a first logic gate formed in the logic region. A charge trapping dielectric can then be disposed and removed from a second logic region. A gate conductor layer can then be disposed on the device and etched to define a memory gate on the sidewall of the select gate and a second logic gate in the second logic region.
    Type: Application
    Filed: December 14, 2012
    Publication date: June 19, 2014
    Applicant: Spansion LLC
    Inventors: Kuo Tung CHANG, Chun CHEN, Shenqing FANG
  • Publication number: 20140167140
    Abstract: Semiconductor devices and methods of manufacturing such devices are described herein. According to embodiments, a semiconductor device includes a memory gate disposed in a first region of the semiconductor device. The memory gate may include a first gate conductor layer disposed over a charge trapping dielectric. A select gate may be disposed in the first region of the semiconductor device adjacent to a sidewall of the memory gate. A sidewall dielectric may be disposed between the sidewall of the memory gate and the select gate. Additionally, the device may include a logic gate disposed in a second region of the semiconductor device that comprises the first gate conductor layer.
    Type: Application
    Filed: December 14, 2012
    Publication date: June 19, 2014
    Applicant: Spansion LLC
    Inventors: Shenqing FANG, Chun CHEN, Unsoon KIM, Mark RAMSBEY, Kuo Tung CHANG, Sameer HADDAD, James PAK