Patents by Inventor Wenmei Li

Wenmei Li 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: 8487373
    Abstract: Methods for forming a memory cell are disclosed. A method includes forming a source-drain structure in a semiconductor substrate where the source-drain structure includes a rounded top surface and sidewall surfaces. An oxide layer is formed on the top and sidewall surfaces of the source-drain structure. The thickness of the portion of the oxide layer that is formed on the top surface of the source-drain structure is greater than the thickness of the portion of the oxide layer that is formed on the sidewall surfaces of the source-drain structure.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: July 16, 2013
    Assignee: Spanion LLC
    Inventors: Shenqing Fang, Gang Xue, Wenmei Li, Inkuk Kang
  • Patent number: 8441041
    Abstract: An integrated circuit memory device, in one embodiment, includes a substrate and first and second inter-level dielectric layers successively disposed on the substrate. One or more contacts in the peripheral extend through the first inter-level dielectric layer to respective components. One or more vias and a plurality of dummy vias extend through the second inter-level dielectric layer in the peripheral area. Each of the one or more peripheral vias extend to a respective peripheral contact. The peripheral dummy vias are located proximate the peripheral vias.
    Type: Grant
    Filed: November 10, 2010
    Date of Patent: May 14, 2013
    Assignee: Spansion LLC
    Inventors: Shenqing Fang, Wenmei Li
  • 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
  • Publication number: 20120262716
    Abstract: A method and system for intelligently identifying and reading an immunochromatographic strip is disclosed.
    Type: Application
    Filed: August 17, 2010
    Publication date: October 18, 2012
    Applicant: GUANGZHOU WONDFO BIOTECH. CO., LTD.
    Inventors: Jihua Wang, Wenmei Li
  • Publication number: 20120056260
    Abstract: A memory and method of manufacture employing word line scaling. A layered stack, including a charge trapping component and a core polysilicon layer, is formed on a core section and a peripheral section of a substrate. A portion of the layered stack, including the core polysilicon layer is then removed from the peripheral section. A peripheral polysilicon layer, which is thicker than the core polysilicon layer of the layered stack, is next formed on the layered stack and the peripheral section. The layered stack is then isolated from the peripheral polysilicon layer by removing a portion of the peripheral polysilicon layer from the core section, and polysilicon lines are patterned in the isolated layered stack.
    Type: Application
    Filed: November 10, 2011
    Publication date: March 8, 2012
    Applicant: Spansion LLC
    Inventors: Shenqing Fang, Chun Chen, Wenmei Li, Inkuk Kang, Gang Xue, Hyesook Hong
  • Patent number: 8076199
    Abstract: A memory and method of manufacture employing word line scaling. A layered stack, including a charge trapping component and a core polysilicon layer, is formed on a core section and a peripheral section of a substrate. A portion of the layered stack, including the core polysilicon layer is then removed from the peripheral section. A peripheral polysilicon layer, which is thicker than the core polysilicon layer of the layered stack, is next formed on the layered stack and the peripheral section. The layered stack is then isolated from the peripheral polysilicon layer by removing a portion of the peripheral polysilicon layer from the core section, and polysilicon lines are patterned in the isolated layered stack.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: December 13, 2011
    Assignee: Spansion LLC
    Inventors: Shenqing Fang, Chun Chen, Wenmei Li, Inkuk Kang, Gang Xue, Hyesook Hong
  • Patent number: 8022468
    Abstract: A memory device may include a substrate, a first dielectric layer formed over the substrate and a charge storage element formed over the first dielectric layer. The memory device may also include a second dielectric layer formed over the charge storage element and a control gate formed over the second dielectric layer. The memory device may further include an interlayer dielectric formed over the control gate and the substrate, where the interlayer dielectric includes a material that is substantially opaque to ultraviolet radiation.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: September 20, 2011
    Assignees: Spansion LLC, Advanced Micro Devices, Inc.
    Inventors: Minh Van Ngo, Wenmei Li, Jeffrey A. Shields, Ning Cheng, Angela Hui, Cinti Xiaohua Chen
  • 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: 7977218
    Abstract: Novel fabrication methods implement the use of dummy tiles to avoid the effects of in-line charging, ESD events, and such charge effects in the formation of a memory device region region. One method involves forming at least a portion of a memory core array upon a semiconductor substrate that involves forming STI structures in the substrate substantially surrounding a memory device region region within the array. An oxide layer is formed over the substrate in the memory device region region and over the STI's, wherein an inner section of the oxide layer formed over the memory device region region is thicker than an outer section of the oxide layer formed over the STI's. A first polysilicon layer is then formed over the inner and outer sections comprising one or more dummy tiles formed over one or more outer sections and electrically connected to at least one inner section.
    Type: Grant
    Filed: December 26, 2006
    Date of Patent: July 12, 2011
    Assignee: Spansion LLC
    Inventors: Cinti Chen, Yi He, Wenmei Li, Zhizheng Liu, Ming-Sang Kwan, Yu Sun, Jean Yee-Mei Yang
  • Patent number: 7951704
    Abstract: An integrated circuit memory device, in one embodiment, includes a substrate and first and second inter-level dielectric layers successively disposed on the substrate. One or more contacts in the peripheral extend through the first inter-level dielectric layer to respective components. One or more vias and a plurality of dummy vias extend through the second inter-level dielectric layer in the peripheral area. Each of the one or more peripheral vias extend to a respective peripheral contact. The peripheral dummy vias are located proximate the peripheral vias.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: May 31, 2011
    Assignee: Spansion LLC
    Inventors: Shenqing Fang, Wenmei Li
  • 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: 20110057315
    Abstract: An integrated circuit memory device, in one embodiment, includes a substrate and first and second inter-level dielectric layers successively disposed on the substrate. One or more contacts in the peripheral extend through the first inter-level dielectric layer to respective components. One or more vias and a plurality of dummy vias extend through the second inter-level dielectric layer in the peripheral area. Each of the one or more peripheral vias extend to a respective peripheral contact. The peripheral dummy vias are located proximate the peripheral vias.
    Type: Application
    Filed: November 10, 2010
    Publication date: March 10, 2011
    Inventors: Shenqing FANG, Wenmei LI
  • Publication number: 20100276746
    Abstract: Methods for forming a memory cell are disclosed. A method includes forming a source-drain structure in a semiconductor substrate where the source-drain structure includes a rounded top surface and sidewall surfaces. An oxide layer is formed on the top and sidewall surfaces of the source-drain structure. The thickness of the portion of the oxide layer that is formed on the top surface of the source-drain structure is greater than the thickness of the portion of the oxide layer that is formed on the sidewall surfaces of the source-drain structure.
    Type: Application
    Filed: April 29, 2009
    Publication date: November 4, 2010
    Inventors: Shenqing FANG, Gang XUE, Wenmei LI, Inkuk KANG
  • Publication number: 20100207191
    Abstract: A memory and method of manufacture employing word line scaling. A layered stack, including a charge trapping component and a core polysilicon layer, is formed on a core section and a peripheral section of a substrate. A portion of the layered stack, including the core polysilicon layer is then removed from the peripheral section. A peripheral polysilicon layer, which is thicker than the core polysilicon layer of the layered stack, is next formed on the layered stack and the peripheral section. The layered stack is then isolated from the peripheral polysilicon layer by removing a portion of the peripheral polysilicon layer from the core section, and polysilicon lines are patterned in the isolated layered stack.
    Type: Application
    Filed: February 13, 2009
    Publication date: August 19, 2010
    Applicant: Spansion LLC
    Inventors: Shenqing FANG, Chun Chen, Wenmei Li, Inkuk Kang, Gang Xue, Hyesook Hong
  • 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
  • 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
  • Publication number: 20090289369
    Abstract: An integrated circuit memory device, in one embodiment, includes a substrate and first and second inter-level dielectric layers successively disposed on the substrate. One or more contacts in the peripheral extend through the first inter-level dielectric layer to respective components. One or more vias and a plurality of dummy vias extend through the second inter-level dielectric layer in the peripheral area. Each of the one or more peripheral vias extend to a respective peripheral contact. The peripheral dummy vias are located proximate the peripheral vias.
    Type: Application
    Filed: July 30, 2009
    Publication date: November 26, 2009
    Inventors: Shenqing FANG, Wenmei LI
  • 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
  • Publication number: 20080153269
    Abstract: The present invention pertains to a system and method for implementing dummy tiles in forming a memory device. The system and method involves forming at least a portion of a memory core array upon a semiconductor substrate comprising, forming STI structures in the substrate, depositing an oxide layer over the substrate, forming a first polysilicon layer over the oxide layer, doping the first polysilicon layer, forming a second polysilicon layer over the first polysilicon layer, patterning at least one memory core, patterning at least one dummy tile and performing back end processing.
    Type: Application
    Filed: December 26, 2006
    Publication date: June 26, 2008
    Inventors: Cinti Chen, Yi He, Wenmei Li, Zhizheng Liu, Ming-Sang Kwan, Yu Sun, Jean Yee-Mei Yang
  • 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