Patents by Inventor Angela T. Hui

Angela T. Hui 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: 7679129
    Abstract: A memory device includes a substrate and a first dielectric layer formed over the substrate. At least two charge storage elements are formed over the first dielectric layer. The substrate and the first dielectric layer include a shallow trench filled with an oxide material. The oxide material formed in a center portion of the shallow trench is removed to provide a region with a substantially rectangular cross-section.
    Type: Grant
    Filed: May 13, 2005
    Date of Patent: March 16, 2010
    Assignees: Spansion LLC, GlobalFoundries
    Inventors: Angela T. Hui, Unsoon Kim, Hiroyuki Kinoshita, Kuo-Tung Chang
  • Patent number: 7670959
    Abstract: A method of manufacturing a memory device forms a first dielectric layer over a substrate, forms a charge storage layer over the first dielectric layer, forms a second dielectric layer over the charge storage layer, and forms a control gate layer over the second dielectric layer. The method also forms a hard mask layer over the control gate layer, forms a bottom anti-reflective coating (BARC) layer over the hard mask layer, and provides an etch chemistry that includes tetrafluoromethane (CF4) and trifluoromethane (CHF3) to etch at least the control gate layer.
    Type: Grant
    Filed: December 26, 2006
    Date of Patent: March 2, 2010
    Assignees: Spansion LLC, Advanced Micro Devices, Inc.
    Inventors: Angela T. Hui, Jihwan Choi
  • Publication number: 20090294969
    Abstract: The present invention is a semiconductor contact formation system and method. Contact insulation regions are formed with multiple etch stop sublayers that facilitate formation of contacts. This contact formation process provides relatively small substrate connections while addressing critical lithographic printing limitation concerns in forming contact holes with small dimensions. In one embodiment, a multiple etch stop insulation layer comprising multiple etch stop layers is deposited. A contact region is formed in the multiple etch stop insulation layer by selectively removing (e.g., etching) some of the multiple etch stop insulation layer. In one embodiment, a larger portion of the multiple etch stop insulation layer is removed close to the metal layer and a smaller portion is removed closer to the substrate.
    Type: Application
    Filed: August 11, 2009
    Publication date: December 3, 2009
    Inventors: Wenmei LI, Angela T. HUI, Dawn HOPPER, Kouros GHANDEHARI
  • Patent number: 7572727
    Abstract: The present invention is a semiconductor contact formation system and method. Contact insulation regions are formed with multiple etch stop sublayers that facilitate formation of contacts. This contact formation process provides relatively small substrate connections while addressing critical lithographic printing limitation concerns in forming contact holes with small dimensions. In one embodiment, a multiple etch stop insulation layer comprising multiple etch stop layers is deposited. A contact region is formed in the multiple etch stop insulation layer by selectively removing (e.g., etching) some of the multiple etch stop insulation layer. In one embodiment, a larger portion of the multiple etch stop insulation layer is removed close to the metal layer and a smaller portion is removed closer to the substrate.
    Type: Grant
    Filed: September 2, 2004
    Date of Patent: August 11, 2009
    Assignee: Spansion LLC
    Inventors: Wenmei Li, Angela T. Hui, Dawn Hopper, Kouros Ghandehari
  • Patent number: 7432178
    Abstract: A method for performing a bit line implant is disclosed. The method includes forming a group of structures on an oxide-nitride-oxide stack of a semiconductor device. Each structure of the group of structures includes a polysilicon portion and a hard mask portion. A first structure of the group of structures is separated from a second structure of the group of structures by less than 100 nanometers. The method further includes using the first structure and the second structure to isolate a portion of the semiconductor device for the bit line implant.
    Type: Grant
    Filed: October 21, 2005
    Date of Patent: October 7, 2008
    Assignees: Advanced Micro Devices, Inc., Spansion LLC
    Inventors: Angela T. Hui, Jean Yang, Yu Sun, Mark T. Ramsbey, Weidong Qian
  • Publication number: 20080153224
    Abstract: An integrated circuit system is provided including forming a memory section having a spacer with a substrate, forming an outer doped region of the memory section in the substrate, forming a contact on the outer doped region, thinning the contact for forming a thinned contact, and forming a metal plug on the thinned contact.
    Type: Application
    Filed: April 13, 2007
    Publication date: June 26, 2008
    Applicants: SPANSION LLC, ADVANCED MICRO DEVICES, INC.
    Inventors: Connie Pin Chin Wang, Simon Siu-Sing Chan, Angela T. Hui, Paul R. Besser, Shenqing Fang
  • Publication number: 20080153298
    Abstract: A method of manufacturing a memory device forms a first dielectric layer over a substrate, forms a charge storage layer over the first dielectric layer, forms a second dielectric layer over the charge storage layer, and forms a control gate layer over the second dielectric layer. The method also forms a hard mask layer over the control gate layer, forms a bottom anti-reflective coating (BARC) layer over the hard mask layer, and provides an etch chemistry that includes tetrafluoromethane (CF4) and trifluoromethane (CHF3) to etch at least the control gate layer.
    Type: Application
    Filed: December 26, 2006
    Publication date: June 26, 2008
    Applicants: Advanced Micro Devices, Inc., Spansion LLC
    Inventors: Angela T. Hui, Jihwan Choi
  • Publication number: 20080150042
    Abstract: A method for forming an integrated circuit system is provided including forming a memory section having a spacer with a substrate, forming an outer doped region of the memory section in the substrate, forming a barrier metal layer over the spacer, and forming a metal plug over the outer doped region and the barrier metal layer.
    Type: Application
    Filed: December 17, 2007
    Publication date: June 26, 2008
    Applicants: SPANSION LLC, ADVANCED MICRO DEVICES, INC.
    Inventors: Simon Siu-Sing Chan, Hidehiko Shiraiwa, Kuo-Tung Chang, Angela T. Hui
  • Publication number: 20080142873
    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: Application
    Filed: December 16, 2006
    Publication date: June 19, 2008
    Applicants: SPANSION LLC, ADVANCED MICRO DEVICES, INC.
    Inventors: Angela T. Hui, Mark S. Chang, Kuo-Tung Chang, Scott A. Bell
  • Publication number: 20080096348
    Abstract: A memory device includes a number of memory cells and a dielectric layer formed over the memory cells. The memory device also includes contacts formed in the dielectric layer and spacers formed adjacent the side surfaces of the contacts. The spacers may inhibit leakage currents from the contacts.
    Type: Application
    Filed: October 20, 2006
    Publication date: April 24, 2008
    Applicants: ADVANCED MICRO DEVICES, INC., SPANSION LLC
    Inventors: Angela T. HUI, Wenmei LI, Minh Van NGO, Amol Ramesh JOSHI, Kuo-Tung CHANG
  • Patent number: 7361587
    Abstract: The present invention is a semiconductor contact formation system and methods that form contact insulation regions comprising multiple etch stop sublayers that facilitate formation of contacts. This contract formation process provides relatively small substrate connections while addressing critical lithographic printing limitation concerns in forming contact holes with small dimensions. In one embodiment, a multiple etch stop contact formation process in which a multiple etch stop insulation layer comprising multiple etch stop layers is deposited. A contact region is formed in the multiple etch stop insulation layer by selectively removing (e.g., etching) some of the multiple etch stop insulation layer. In one embodiment a larger portion of the multiple etch stop insulation layer is removed close to the metal layer and a smaller portion is removed closer to the substrate.
    Type: Grant
    Filed: September 2, 2004
    Date of Patent: April 22, 2008
    Assignee: Spansion, LLC
    Inventors: Wenmei Li, Angela T. Hui, Dawn Hopper, Kouros Ghandehari
  • Patent number: 7341956
    Abstract: A method includes forming a group of disposable hard mask structures on a semiconductor device that includes a group of memory cells. The method further includes using the disposable hard mask structures to precisely control a junction profile of the memory cells.
    Type: Grant
    Filed: April 7, 2005
    Date of Patent: March 11, 2008
    Assignees: Spansion LLC, Advanced Micro Devices, Inc.
    Inventors: Hirokazu Tokuno, Minh-Van Ngo, Angela T. Hui, Cinti Xiaohua Chen
  • Patent number: 7323418
    Abstract: The present invention leverages an etch-back process to provide an electrode cap for a polymer memory element. This allows the polymer memory element to be formed within a via embedded in layers formed on a substrate. By utilizing the etch-back process, the present invention provides tiny electrical contacts necessary for the proper functioning of polymer memory devices that utilize the vias. In one instance of the present invention, one or more via openings are formed in a dielectric layer to expose an underlying layer. A polymer layer is then formed within the via on the underlying layer with a top electrode material layer deposited over the polymer layer, filling the remaining portion of the via. Excess portions of the top electrode material are then removed by an etching process to form an electrode cap that provides an electrical contact point for the polymer memory element.
    Type: Grant
    Filed: April 8, 2005
    Date of Patent: January 29, 2008
    Assignee: Spansion LLC
    Inventors: Minh Van Ngo, Angela T. Hui, Sergey D. Lopatin
  • Patent number: 7300886
    Abstract: A method of manufacturing a memory device includes forming a first dielectric layer over a substrate and forming a charge storage element over the first dielectric layer. The method also includes forming a second dielectric layer over the charge storage element and forming a control gate over the second dielectric layer. The method further includes depositing an interlayer dielectric over the control gate at a high temperature.
    Type: Grant
    Filed: June 8, 2005
    Date of Patent: November 27, 2007
    Assignees: Spansion LLC, Advanced Micro Devices, Inc.
    Inventors: Minh Van Ngo, Ning Cheng, Wenmei Li, Angela T. Hui, Pei-Yuan Gao, Robert A. Huertas
  • Patent number: 7301193
    Abstract: According to one exemplary embodiment, a floating gate memory cell comprises a stacked gate structure situated on a substrate and situated over a channel region in the substrate. The floating gate memory cell further comprises a recess formed in the substrate adjacent to the stacked gate structure, where the recess has a sidewall, a bottom, and a depth. According to this exemplary embodiment, the floating gate memory cell further comprises a source situated adjacent to the sidewall of the recess and under the stacked gate structure. The floating gate memory cell further comprises a Vss connection region situated under the bottom of the recess and under the source, where the Vss connection region is connected to the source. The Vss connection region being situated under the bottom of the recess causes the source to have a reduced lateral diffusion in the channel region.
    Type: Grant
    Filed: January 22, 2004
    Date of Patent: November 27, 2007
    Assignee: Spansion LLC
    Inventors: Shenqing Fang, Timothy Thurgate, Kuo-Tung Chang, Richard Fastow, Angela T. Hui, Kazuhiro Mizutani, Kelwin Ko, Hiroyuki Kinoshita, Yu Sun, Hiroyuki Ogawa
  • Patent number: 7285499
    Abstract: A method includes forming a group of first structures on a semiconductor device and forming spacers adjacent side surfaces of each of the first structures to form a group of second structures. The method further includes using the group of second structures to form at least one sub-lithographic opening in a material layer located below the group of second structures.
    Type: Grant
    Filed: May 12, 2005
    Date of Patent: October 23, 2007
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Scott A. Bell, Phillip Lawrence Jones, Angela T. Hui
  • Patent number: 7265014
    Abstract: A method and device for avoiding oxide gouging in shallow trench isolation (STI) regions of a semiconductor device. A trench may be etched in an STI region and filled with insulating material. An anti-reflective coating (ARC) layer may be deposited over the STI region and extend beyond the boundaries of the STI region. A portion of the ARC layer may be etched leaving a remaining portion of the ARC layer over the STI region and extending beyond the boundaries of the STI region. A protective cap may be deposited to cover the remaining portion of the ARC layer as well as the insulating material. The protective cap may be etched back to expose the ARC layer. However, the protective cap still covers and protects the insulating material. By providing a protective cap that covers the insulating material, gouging of the insulating material in STI regions may be avoided.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: September 4, 2007
    Assignee: Spansion LLC
    Inventors: Angela T. Hui, Jusuke Ogura, Yider Wu
  • Patent number: 7238571
    Abstract: A memory device may include a number of memory cells, a first interlayer dielectric formed over the memory cells and at least one metal layer formed over the interlayer dielectric. A dielectric layer may be formed over the metal layer. The dielectric layer may represent a cap layer formed at or near an upper surface of the memory device and may be deposited at a relatively low temperature.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: July 3, 2007
    Assignees: Advanced Micro Devices, Inc., Spansion LLC
    Inventors: Hirokazu Tokuno, Wenmei Li, Ning Cheng, Minh Van Ngo, Angela T. Hui, Cinti X. Chen
  • Patent number: 7157335
    Abstract: The present invention facilitates dual bit memory devices and operation of dual bit memory device by providing systems and methods that employ a relatively thin undoped TEOS liner during fabrication, instead of a relatively thick TEOS layer that is conventionally used. Employment of the relatively thin liner facilitates dual bit memory device operation by mitigating charge loss and contact resistance while providing protection against unwanted dopant diffusion. The present invention includes utilizing a relatively thin undoped TEOS liner that is formed on wordlines and portions of a charge trapping dielectric layer. The relatively thin undoped TEOS liner is formed with a thickness of less than about 400 Angstroms so that contact resistance and charge loss are improved and yet providing suitable protection for operation of the device. Additionally, the present invention includes foregoing with an undoped TEOS liner altogether.
    Type: Grant
    Filed: August 13, 2004
    Date of Patent: January 2, 2007
    Assignee: Spansion LLC
    Inventors: Ning Cheng, Minh Van Ngo, Hirokazu Tokuno, Lu You, Angela T. Hui, Yi He, Brian Mooney, Jean Yei-Mei Yang, Mark T. Ramsbey
  • Patent number: 7115440
    Abstract: Disclosed are methods of making memory cells and semiconductor devices containing the memory cells. The methods involve oxidizing a portion of a copper containing electrode to form a copper oxide layer; contacting the copper oxide layer with at least one of a sulfur containing gas or plasma to form a CuS layer; forming an organic semiconductor over the CuS layer; and forming an electrode over the organic semiconductor. Such devices containing the memory cells are characterized by light weight and robust reliability.
    Type: Grant
    Filed: October 1, 2004
    Date of Patent: October 3, 2006
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Christopher F. Lyons, Ramkumar Subramanian, Sergey D. Lopatin, James J. Xie, Angela T. Hui