Patents by Inventor Zhiyi Yu

Zhiyi Yu 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: 11798979
    Abstract: An integrated capacitor on a semiconductor surface on a substrate includes a capacitor dielectric layer including at least one silicon compound material layer on a bottom plate. The capacitor dielectric layer includes a pitted sloped dielectric sidewall. Each of the pits is at least partially filled by one of a plurality of noncontiguous dielectric portions. A conformal dielectric layer may be formed over the noncontiguous dielectric portions. A top metal layer provides a top plate of the capacitor.
    Type: Grant
    Filed: January 25, 2021
    Date of Patent: October 24, 2023
    Assignee: Texas Instruments Incorporated
    Inventors: Elizabeth Costner Stewart, Jeffrey A. West, Thomas D. Bonifield, Joseph Andre Gallegos, Jay Sung Chun, Zhiyi Yu
  • Patent number: 11087451
    Abstract: A method comprises obtaining a wafer comprising a plurality of components, wherein each of the plurality of components exposes a first surface of the component present in a first focal plane and a second surface of the component present in a second focal plane. The method comprises generating, by an optical tool, a first image of the first surface and a second image of the second surface of one of the plurality of components. The method comprises comparing, by a processor, the first image with a first reference image to produce a first value and the second image with a second reference image to produce a second value. The method comprises generating, by the processor, a wafer map indicating a quality state of the one of the plurality of components based on the first and second values.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: August 10, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Elizabeth C. Stewart, Young Sawk Oh, Zhiyi Yu, Jeffrey A. West, Thomas D. Bonifield
  • Publication number: 20210143249
    Abstract: An integrated capacitor on a semiconductor surface on a substrate includes a capacitor dielectric layer including at least one silicon compound material layer on a bottom plate. The capacitor dielectric layer includes a pitted sloped dielectric sidewall. Each of the pits is at least partially filled by one of a plurality of noncontiguous dielectric portions. A conformal dielectric layer may be formed over the noncontiguous dielectric portions. A top metal layer provides a top plate of the capacitor.
    Type: Application
    Filed: January 25, 2021
    Publication date: May 13, 2021
    Inventors: ELIZABETH COSTNER STEWART, JEFFREY A. WEST, THOMAS D. BONIFIELD, JOSEPH ANDRE GALLEGOS, JAY SUNG CHUN, ZHIYI YU
  • Patent number: 10978548
    Abstract: A method of forming an integrated capacitor on a semiconductor surface on a substrate includes etching a capacitor dielectric layer including at least one silicon compound material layer on a bottom plate which is above and electrically isolated from the semiconductor surface to provide at least one defined dielectric feature having sloped dielectric sidewall portion. A dielectric layer is deposited to at least partially fill pits in the sloped dielectric sidewall portion to smooth a surface of the sloped dielectric sidewall portion. The dielectric layer is etched, and a top plate is then formed on top of the dielectric feature.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: April 13, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Elizabeth Costner Stewart, Jeffrey A. West, Thomas D. Bonifield, Joseph Andre Gallegos, Jay Sung Chun, Zhiyi Yu
  • Publication number: 20190188839
    Abstract: A method comprises obtaining a wafer comprising a plurality of components, wherein each of the plurality of components exposes a first surface of the component present in a first focal plane and a second surface of the component present in a second focal plane. The method comprises generating, by an optical tool, a first image of the first surface and a second image of the second surface of one of the plurality of components. The method comprises comparing, by a processor, the first image with a first reference image to produce a first value and the second image with a second reference image to produce a second value. The method comprises generating, by the processor, a wafer map indicating a quality state of the one of the plurality of components based on the first and second values.
    Type: Application
    Filed: December 19, 2017
    Publication date: June 20, 2019
    Inventors: Elizabeth C. STEWART, Young Sawk OH, Zhiyi YU, Jeffrey A. WEST, Thomas D. BONIFIELD
  • Publication number: 20180130870
    Abstract: A method of forming an integrated capacitor on a semiconductor surface on a substrate includes etching a capacitor dielectric layer including at least one silicon compound material layer on a bottom plate which is above and electrically isolated from the semiconductor surface to provide at least one defined dielectric feature having sloped dielectric sidewall portion. A dielectric layer is deposited to at least partially fill pits in the sloped dielectric sidewall portion to smooth a surface of the sloped dielectric sidewall portion. The dielectric layer is etched, and a top plate is then formed on top of the dielectric feature.
    Type: Application
    Filed: November 10, 2016
    Publication date: May 10, 2018
    Inventors: ELIZABETH COSTNER STEWART, JEFFREY A. WEST, THOMAS D. BONIFIELD, JOSEPH ANDRE GALLEGOS, JAY SUNG CHUN, ZHIYI YU
  • Publication number: 20130264620
    Abstract: A method of forming a barrier/liner for ferroelectric memory capacitors includes chemical vapor depositing 15 to 40 A of a first layer including a refractory metal nitride over a substrate having a plurality of metal-oxide-semiconductor (MOS) gate structures, ferroelectric memory (FeRAM) capacitors, and vias in a dielectric layer overlying the substrate. The first layer is treated using a first plasma treatment including exposing the first layer to a plasma in an atmosphere substantially-free of hydrogen. A 15 to 40 A thick second refractory metal nitride layer is chemical vapor deposited of over the first layer. The second layer is treated using a second plasma treatment including exposing the second layer to a plasma in an atmosphere substantially-free of hydrogen.
    Type: Application
    Filed: April 6, 2012
    Publication date: October 10, 2013
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Zhiyi Yu, Ollen Harvey Mullis, John Paul Campbell
  • Patent number: 7169619
    Abstract: High quality epitaxial layers of monocrystalline oxide materials (24) can be grown overlying monocrystalline substrates (22) such as large silicon wafers. The monocrystalline oxide layer (24) comprises a layer of monocrystalline oxide spaced apart from the silicon wafer by an amorphous interface layer (28) of silicon oxide. The amorphous interface layer serves as a decoupling layer between the substrate and the buffer layer so that the substrate and the buffer is crystal-graphically, chemically, and dielectrically decoupled. In addition, high quality epitaxial accommodating buffer layers may be formed overlying vicinal substrates using a low pressure, low temperature, alkaline-earth metal-rich process.
    Type: Grant
    Filed: November 19, 2002
    Date of Patent: January 30, 2007
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Yong Liang, Ravindranath Droopad, Xiaoming Hu, Jun Wang, Yi Wei, Zhiyi Yu
  • Patent number: 7141857
    Abstract: Semiconductor structures and processes for fabricating semiconductor structures comprising hafnium oxide layers modified with lanthanum oxide or a lanthanide-series metal oxide are provided. A semiconductor structure in accordance with an embodiment of the invention comprises an amorphous layer of hafnium oxide overlying a substrate. A lanthanum-containing dopant or a lanthanide-series metal-containing dopant is comprised within the amorphous layer of hafnium oxide. The process comprises growing an amorphous layer of hafnium oxide overlying a substrate. The amorphous layer of hafnium oxide is doped with a dopant having the chemical formulation LnOx, where Ln is lanthanum, a lanthanide-series metal, or a combination thereof, and X is any number greater than zero. The doping step may be performed during or after growth of the amorphous layer of hafnium oxide.
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: November 28, 2006
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Zhiyi Yu, Jay A. Curless, Yong Liang, Alexandra Navrotsky, Sergey Ushakov, Bich-Yen Nguyen, Alexander Demkov
  • Patent number: 7045815
    Abstract: A semiconductor structure exhibiting reduced leakage current is formed of a monocrystalline substrate (101) and a strained-layer heterostructure (105). The strained-layer heterostructure has a first layer (102) formed of a first monocrystalline oxide material having a first lattice constant and a second layer (104) formed of a second monocrystalline oxide material overlying the first layer and having a second lattice constant. The second lattice constant is different from the first lattice constant. The second layer creates strain within the oxide material layers, at the interface between the first and second oxide material layers of the heterostructure, and at the interface of the substrate and the first layer, which changes the energy band offset at the interface of the substrate and the first layer.
    Type: Grant
    Filed: July 30, 2002
    Date of Patent: May 16, 2006
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Zhiyi Yu, Ravindranath Droopad
  • Publication number: 20060003602
    Abstract: Semiconductor structures and processes for fabricating semiconductor structures comprising hafnium oxide layers modified with lanthanum oxide or a lanthanide-series metal oxide are provided. A semiconductor structure in accordance with an embodiment of the invention comprises an amorphous layer of hafnium oxide overlying a substrate. A lanthanum-containing dopant or a lanthanide-series metal-containing dopant is comprised within the amorphous layer of hafnium oxide. The process comprises growing an amorphous layer of hafnium oxide overlying a substrate. The amorphous layer of hafnium oxide is doped with a dopant having the chemical formulation LnOx, where Ln is lanthanum, a lanthanide-series metal, or a combination thereof, and X is any number greater than zero. The doping step may be performed during or after growth of the amorphous layer of hafnium oxide.
    Type: Application
    Filed: June 30, 2004
    Publication date: January 5, 2006
    Inventors: Zhiyi Yu, Jay Curless, Yong Liang
  • Patent number: 6885065
    Abstract: A ferromagnetic semiconductor structure is provided. The structure includes a monocrystalline semiconductor substrate and a doped titanium oxide anatase layer overlying the semiconductor substrate.
    Type: Grant
    Filed: November 20, 2002
    Date of Patent: April 26, 2005
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Yong Liang, Ravindranath Droopad, Hao Li, Zhiyi Yu
  • Patent number: 6852588
    Abstract: Methods are provided for fabricating semiconductor structures and semiconductor device structures utilizing epitaxial Hf3Si2 layers. A process in accordance with one embodiment of the invention begins by disposing a silicon substrate in a processing chamber. The pressure within the processing chamber and a temperature of the silicon substrate in the range of approximately 250° C. to approximately 700° C. is established. A layer of Hf3Si2 then is grown overlying the silicon substrate at a rate in the range of about one (1) to about five (5) monolayers per minute.
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: February 8, 2005
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Zhiyi Yu, Jay A. Curless, Yong Liang
  • Patent number: 6806202
    Abstract: A method for removing silicon oxide from a surface of a substrate is disclosed. The method includes depositing material onto the silicon oxide (110) and heating the substrate surface to a sufficient temperature to form volatile compounds including the silicon oxide and the deposited material (120). The method also includes heating the surface to a sufficient temperature to remove any remaining deposited material (130).
    Type: Grant
    Filed: December 3, 2002
    Date of Patent: October 19, 2004
    Assignee: Motorola, Inc.
    Inventors: Xiaoming Hu, James B. Craigo, Ravindranath Droopad, John L. Edwards, Jr., Yong Liang, Yi Wei, Zhiyi Yu
  • Patent number: 6750067
    Abstract: A high quality epitaxial layer of monocrystalline Pb(Zr,Ti)O3 can be grown overlying large silicon wafers by first growing an strontium titanate layer on a silicon wafer. The strontium titanate layer is a monocrystalline layer spaced apart from the silicon wafer by an amorphous interface layer of silicon oxide.
    Type: Grant
    Filed: April 19, 2002
    Date of Patent: June 15, 2004
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Ramoothy Ramesh, Yu Wang, Jeffrey M. Finder, Kurt Eisenbeiser, Zhiyi Yu, Ravindranath Droopad
  • Publication number: 20040106296
    Abstract: A method for removing silicon oxide from a surface of a substrate is disclosed. The method includes depositing material onto the silicon oxide (110) and heating the substrate surface to a sufficient temperature to form volatile compounds including the silicon oxide and the deposited material (120). The method also includes heating the surface to a sufficient temperature to remove any remaining deposited material (130).
    Type: Application
    Filed: December 3, 2002
    Publication date: June 3, 2004
    Inventors: Xiaoming Hu, James B. Craigo, Ravindranath Droopad, John L. Edwards, Yong Liang, Yi Wei, Zhiyi Yu
  • Publication number: 20040094801
    Abstract: A ferromagnetic semiconductor structure is provided. The structure includes a monocrystalline semiconductor substrate and a doped titanium oxide anatase layer overlying the semiconductor substrate.
    Type: Application
    Filed: November 20, 2002
    Publication date: May 20, 2004
    Applicant: MOTOROLA, INC.
    Inventors: Yong Liang, Ravindranath Droopad, Hao Li, Zhiyi Yu
  • Publication number: 20040097096
    Abstract: High quality epitaxial layers of monocrystalline oxide materials (24) can be grown overlying monocrystalline substrates (22) such as large silicon wafers. The monocrystalline oxide layer (24) comprises a layer of monocrystalline oxide spaced apart from the silicon wafer by an amorphous interface layer (28) of silicon oxide. The amorphous interface layer serves as a decoupling layer between the substrate and the buffer layer so that the substrate and the buffer is crystal-graphically, chemically, and dielectrically decoupled. In addition, high quality epitaxial accommodating buffer layers may be formed overlying vicinal substrates using a low pressure, low temperature, alkaline-earth metal-rich process.
    Type: Application
    Filed: November 19, 2002
    Publication date: May 20, 2004
    Inventors: Yong Liang, Ravindranath Droopad, Xiaoming Hu, Jun Wang, Yi Wei, Zhiyi Yu
  • Publication number: 20040079285
    Abstract: High quality epitaxial layers of monocrystalline materials (26) can be grown overlying monocrystalline substrates (22) such as large silicon wafers by forming a compliant substrate for growing the monocrystalline layers. An accommodating buffer layer (24) comprises a layer of monocrystalline oxide spaced apart from a silicon wafer by an amorphous interface layer (28) of silicon oxide. The amorphous interface layer dissipates strain and permits the growth of a high quality monocrystalline oxide accommodating buffer layer. The growth of the monocrystalline oxide film for accommodating buffer layer (24) is achieved through an automated oxygen delivery system (200) that controls a variety of oxygen control parameters, such as pressure control, ramp control, and flow control. The oxygen delivery system (200) is preferably a dual stage pressure control system (204, 206) with the ability to precisely control the oxygen profile in the growth chamber.
    Type: Application
    Filed: October 24, 2002
    Publication date: April 29, 2004
    Applicant: MOTOROLA, INC.
    Inventors: Hao Li, Ravindranath Droopad, Dirk Jordan, Corey Overgaard, Zhiyi Yu
  • Patent number: 6709989
    Abstract: A method of fabricating a semiconductor structure including the steps of: providing a silicon substrate having a surface; forming by atomic layer deposition a monocrystalline seed layer on the surface of the silicon substrate; and forming by atomic layer deposition one or more layers of a monocrystalline high dielectric constant oxide on the seed layer, where providing a substrate includes providing a substrate having formed thereon a silicon oxide, and wherein forming by atomic layer deposition a seed layer further includes depositing a layer of a metal oxide onto a surface of the silicon oxide, flushing the layer of metal oxide with an inert gas, and reacting the metal oxide and the silicon oxide to form a monocrystalline silicate.
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: March 23, 2004
    Assignee: Motorola, Inc.
    Inventors: Jamal Ramdani, Ravindranath Droopad, Zhiyi Yu