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: 8409994
    Abstract: Disclosed are methods and devices for targeting CD of selected transistors in a semiconductor device. Varying CD is done by forming hard mask lines in a hard mask layer that have varying amounts of spacer material associated therewith. Hard mask lines corresponding to selected transistors are either left covered or uncovered by a resist applied over the hard mask layer. Then, spacer material is selectively removed from the hard mask lines to vary the width of hard mask lines and associated side wall spacers. A gate layer is then etched through the spaces in the hard mask lines to form gate lines having varying widths and targeted CD.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: April 2, 2013
    Assignee: Spansion LLC
    Inventors: Bradley M. Davis, Jihwan Choi, Angela T. Hui
  • Patent number: 8367493
    Abstract: A method of manufacturing a non-volatile memory device includes forming a number of memory cells. The method also includes depositing a first dielectric layer over the memory cells, where the first dielectric layer is a conformal layer having a substantially uniform thickness. The method further includes depositing a second dielectric layer over the first dielectric layer. Together, the first and second dielectric layers form an interlayer dielectric without voids.
    Type: Grant
    Filed: April 20, 2005
    Date of Patent: February 5, 2013
    Assignees: Spansion LLC, Advanced Micro Devices, Inc.
    Inventors: Minh Van Ngo, Hirokazu Tokuno, Angela T. Hui, Wenmei Li, Hsiao-Han Thio
  • Patent number: 8349685
    Abstract: A method and manufacture for memory device fabrication is provided. In one embodiment, at least one oxide-nitride spacer is formed as follows. An oxide layer is deposited over a flash memory device such that the deposited oxide layer is at least 250 Angstroms thick. The flash memory device includes a substrate and dense array of word line gates with gaps between each of the word lines gate in the dense array. Also, the deposited oxide layer is deposited such that it completely gap-fills the gaps between the word line gates of the dense array of word line gates. Next, a nitride layer is depositing over the oxide layer. Then, the nitride layer is etched until the at least a portion of the oxide layer is exposed. Next, the oxide layer is etched until at least a portion of the substrate is exposed.
    Type: Grant
    Filed: December 3, 2010
    Date of Patent: January 8, 2013
    Assignee: Spansion LLC
    Inventors: Angela T. Hui, Shenqing Fang
  • Patent number: 8283718
    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: December 16, 2006
    Date of Patent: October 9, 2012
    Assignees: Spansion LLC, Advanced Micro Devices, Inc.
    Inventors: Angela T. Hui, Mark S. Chang, Kuo-Tung Chang, Scott A. Bell
  • Publication number: 20120241871
    Abstract: A method of fabricating an integrated circuit including a first region and a second region each having different poly-silicon gate structures is provided. The method includes depositing a first poly-silicon layer over the first and the second region and depositing, within the second region, an oxide layer over the first poly-silicon layer. A second poly-silicon layer is deposited over the first poly-silicon layer and the oxide region. A portion of the second poly-silicon layer that lies over the oxide region is then stripped away.
    Type: Application
    Filed: March 24, 2011
    Publication date: September 27, 2012
    Applicant: Spansion LLC
    Inventors: Chuan Lin, Hidehiko Shiraiwa, Bradley Marc Davis, Lei Xue, Simon S. Chan, Kenichi Ohtsuka, Angela T. Hui, Scott Allan Bell
  • Publication number: 20120139023
    Abstract: A method and apparatus for a flash memory is provided. A NAND flash memory array includes a cell body, a first selective gate, and a first edge line. The cell body includes recessed doped source/drain region between the first selective gate and the first edge word line.
    Type: Application
    Filed: December 3, 2010
    Publication date: June 7, 2012
    Applicant: Spansion LLC
    Inventors: Chun CHEN, Angela T. Hui, Fei Wang
  • Publication number: 20120142175
    Abstract: A method and manufacture for memory device fabrication is provided. In one embodiment, at least one oxide-nitride spacer is formed as follows. An oxide layer is deposited over a flash memory device such that the deposited oxide layer is at least 250 Angstroms thick. The flash memory device includes a substrate and dense array of word line gates with gaps between each of the word lines gate in the dense array. Also, the deposited oxide layer is deposited such that it completely gap-fills the gaps between the word line gates of the dense array of word line gates. Next, a nitride layer is depositing over the oxide layer. Then, the nitride layer is etched until the at least a portion of the oxide layer is exposed. Next, the oxide layer is etched until at least a portion of the substrate is exposed.
    Type: Application
    Filed: December 3, 2010
    Publication date: June 7, 2012
    Applicant: Spansion LLC
    Inventors: Angela T. HUI, Shenqing Fang
  • Patent number: 8114736
    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: Grant
    Filed: December 17, 2007
    Date of Patent: February 14, 2012
    Assignees: Globalfoundries Inc., Spansion LLC
    Inventors: Simon Siu-Sing Chan, Hidehiko Shiraiwa, Kuo-Tung Chang, Angela T. Hui
  • Publication number: 20120032308
    Abstract: Disclosed are methods and devices for targeting CD of selected transistors in a semiconductor device. Varying CD is done by forming hard mask lines in a hard mask layer that have varying amounts of spacer material associated therewith. Hard mask lines corresponding to selected transistors are either left covered or uncovered by a resist applied over the hard mask layer. Then, spacer material is selectively removed from the hard mask lines to vary the width of hard mask lines and associated side wall spacers. A gate layer is then etched through the spaces in the hard mask lines to form gate lines having varying widths and targeted CD.
    Type: Application
    Filed: October 21, 2011
    Publication date: February 9, 2012
    Applicant: SPANSION LLC
    Inventors: Bradley M. Davis, Jihwan Choi, Angela T. Hui
  • Patent number: 8067314
    Abstract: Disclosed are methods and devices for targeting CD of selected transistors in a semiconductor device. Varying CD is done by forming hard mask lines in a hard mask layer that have varying amounts of spacer material associated therewith. Hard mask lines corresponding to selected transistors are either left covered or uncovered by a resist applied over the hard mask layer. Then, spacer material is selectively removed from the hard mask lines to vary the width of hard mask lines and associated side wall spacers. A gate layer is then etched through the spaces in the hard mask lines to form gate lines having varying widths and targeted CD.
    Type: Grant
    Filed: April 15, 2009
    Date of Patent: November 29, 2011
    Assignee: Spansion LLC
    Inventors: Bradley M. Davis, Jihwan Choi, Angela T. Hui
  • Publication number: 20110195578
    Abstract: A method and manufacture for charge storage layer separation is provided. A layer, such as a polymer layer, is deposited on top of an ONO layer so that the polymer layer is planarized, or approximately planarized. The ONO includes at least a first region and a second region, where the first region is higher than the second region. For example, the first region may be the portion of the ONO that is over the source/drain region, and the second region may be the portion of the ONO that is over the shallow trench. Etching is performed on the polymer layer to expose the first region of the ONO layer, leaving the second region of the ONO unexposed. The etching continues to occur to etch the exposed ONO at the first region so that the ONO layer is etched away in the first region and the second region remains unexposed.
    Type: Application
    Filed: February 10, 2010
    Publication date: August 11, 2011
    Applicant: SPANSION LLC
    Inventors: Angela T. Hui, Gang Xue
  • Patent number: 7985687
    Abstract: A method for forming a memory device includes forming a hard mask over a substrate, where the hard mask includes a first mask layer and a second mask layer formed over the first mask layer. The substrate is etched to form a trench. The trench is filled with a field oxide material. The second mask layer is stripped from the memory device using a first etching technique and the first mask layer is stripped from the memory device using a second etching technique, where the second etching technique is different than the first etching technique.
    Type: Grant
    Filed: July 22, 2005
    Date of Patent: July 26, 2011
    Assignees: Advanced Micro Devices, Inc., Spansion LLC
    Inventors: Angela T. Hui, Hiroyuki Kinoshita, Unsoon Kim, Harpreet K. Sachar
  • Patent number: 7977797
    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: August 11, 2009
    Date of Patent: July 12, 2011
    Assignee: Spansion LLC
    Inventors: Wenmei Li, Angela T. Hui, Dawn Hopper, Kouros Ghandehari
  • Patent number: 7972951
    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: January 15, 2010
    Date of Patent: July 5, 2011
    Assignees: Advanced Micro Devices, Inc., Spansion LLC
    Inventors: Angela T. Hui, Jihwan Choi
  • Patent number: 7927723
    Abstract: A film stack includes an interlayer dielectric formed over one or more devices. The film stack further includes a first layer having a high extinction coefficient formed on the interlayer dielectric and a second layer having a low extinction coefficient formed on the first layer. The first and second layers prevent ultraviolet induced damage to the one or more devices while minimizing reflectivity for lithographic processes.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: April 19, 2011
    Assignees: Spansion LLC, GlobalFoundries Inc.
    Inventors: Angela T. Hui, Ning Cheng, Minh Van Ngo, Hirokazu Tokuno, Wenmei Li
  • Publication number: 20110037115
    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 nitride layer is trimmed on opposite sides of the trench to widen the trench within the nitride layer. The trench is filled with an oxide material. The nitride layer is stripped from the memory device, forming a mesa above the trench.
    Type: Application
    Filed: October 22, 2010
    Publication date: February 17, 2011
    Applicants: SPANSION LLC, ADVANCED MICRO DEVICES, INC.
    Inventors: Unsoon KIM, Angela T. HUI, Yider WU, Kuo-Tung CHANG, Hiroyuki KINOSHITA
  • Patent number: 7842618
    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 nitride layer is trimmed on opposite sides of the trench to widen the trench within the nitride layer. The trench is filled with an oxide material. The nitride layer is stripped from the memory device, forming a mesa above the trench.
    Type: Grant
    Filed: August 1, 2005
    Date of Patent: November 30, 2010
    Assignees: Spansion LLC, Advanced Micro Devices, Inc.
    Inventors: Unsoon Kim, Angela T. Hui, Yider Wu, Kuo-Tung Chang, Hiroyuki Kinoshita
  • Publication number: 20100264519
    Abstract: Disclosed are methods and devices for targeting CD of selected transistors in a semiconductor device. Varying CD is done by forming hard mask lines in a hard mask layer that have varying amounts of spacer material associated therewith. Hard mask lines corresponding to selected transistors are either left covered or uncovered by a resist applied over the hard mask layer. Then, spacer material is selectively removed from the hard mask lines to vary the width of hard mask lines and associated side wall spacers. A gate layer is then etched through the spaces in the hard mask lines to form gate lines having varying widths and targeted CD.
    Type: Application
    Filed: April 15, 2009
    Publication date: October 21, 2010
    Applicant: SPANSION LLC
    Inventors: Bradley M. Davis, Jihwan Choi, Angela T. Hui
  • Publication number: 20100120239
    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: January 15, 2010
    Publication date: May 13, 2010
    Applicants: SPANSION LLC, ADVANCED MICRO DEVICES, INC.
    Inventors: Angela T. HUI, Jihwan CHOI
  • Patent number: 7704878
    Abstract: A contact structure in a semiconductor device includes a layer of dielectric material and a via formed through the dielectric material. The contact structure further includes a spacer formed on sidewalls of the via using atomic layer deposition (ALD) and a metal deposited in the via.
    Type: Grant
    Filed: October 3, 2005
    Date of Patent: April 27, 2010
    Assignees: Advanced Micro Devices, Inc,, Spansion LLC
    Inventors: Minh Van Ngo, Angela T. Hui, Amol Ramesh Joshi, Wenmei Li, Ning Cheng, Ankur Bhushan Agarwal, Norimitsu Takagi