Patents by Inventor Allen Ko

Allen Ko 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: 11594057
    Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for machine learning. One of the methods includes receiving a document having a plurality of first text strings; extracting the plurality of first text strings from the document; providing the extracted plurality of first text strings to a first machine learning model, wherein the first machine learning model is trained to output a numerical vector representation for each input first text string; providing the output vector representations from the first machine learning model to a second machine learning model, wherein the second machine learning model is trained to output a second text string for each input vector representation; and processing the second text strings to generate an output.
    Type: Grant
    Filed: May 4, 2022
    Date of Patent: February 28, 2023
    Assignee: States Title, Inc.
    Inventors: Allen Ko, Daniel Faddoul, Andy Mahdavi
  • Patent number: 11365476
    Abstract: The present disclosure generally relate to thin films incorporating high aspect ratio feature definitions and methods for forming the same. As gate height increases, 3D NAND gate stacks are subject to higher aspect ratio etching. Due to the current limitations of etching techniques, the vertical etch profile typically tapers as the depth into the gate stack increases. The inventors have devised a unique deposition scheme that compensates for etch performance degradation in deep trenches by a novel plasma-enhanced chemical vapor deposition (PECVD) film deposition method. The inventors have found that by grading various properties (e.g., refractive index, stress of the film, dopant concentration in the film) of the as-deposited films (e.g., silicon nitride) a more uniform etch profile can be achieved by compensating for variations in both dry and wet etch rates.
    Type: Grant
    Filed: February 6, 2019
    Date of Patent: June 21, 2022
    Assignee: Applied Materials, Inc.
    Inventors: Praket P. Jha, Allen Ko, Xinhai Han, Thomas Jongwan Kwon, Bok Hoen Kim, Byung Ho Kil, Ryeun Kim, Sang Hyuk Kim
  • Patent number: 11341354
    Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for machine learning. One of the methods includes receiving a document having a plurality of first text strings; extracting the plurality of first text strings from the document; providing the extracted plurality of first text strings to a first machine learning model, wherein the first machine learning model is trained to output a numerical vector representation for each input first text string; providing the output vector representations from the first machine learning model to a second machine learning model, wherein the second machine learning model is trained to output a second text string for each input vector representation; and processing the second text strings to generate an output.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: May 24, 2022
    Assignee: States Title, Inc.
    Inventors: Allen Ko, Daniel Faddoul, Andy Mahdavi
  • Publication number: 20190185996
    Abstract: The present disclosure generally relate to thin films incorporating high aspect ratio feature definitions and methods for forming the same. As gate height increases, 3D NAND gate stacks are subject to higher aspect ratio etching. Due to the current limitations of etching techniques, the vertical etch profile typically tapers as the depth into the gate stack increases. The inventors have devised a unique deposition scheme that compensates for etch performance degradation in deep trenches by a novel plasma-enhanced chemical vapor deposition (PECVD) film deposition method. The inventors have found that by grading various properties (e.g., refractive index, stress of the film, dopant concentration in the film) of the as-deposited films (e.g., silicon nitride) a more uniform etch profile can be achieved by compensating for variations in both dry and wet etch rates.
    Type: Application
    Filed: February 6, 2019
    Publication date: June 20, 2019
    Inventors: Praket P. JHA, Allen KO, Xinhai HAN, Thomas Jongwan KWON, Bok Hoen KIM, Byung Ho KIL, Ryeun KIM, Sang Hyuk KIM
  • Patent number: 10276353
    Abstract: A method and apparatus for a dual-channel showerhead is provided. In one embodiment the showerhead comprises a body comprising a conductive material having a plurality of first openings formed therethrough comprising a first gas channel and a plurality of second openings formed therethrough comprising a second gas channel that is fluidly separated from the first gas channel, wherein each of the first openings having a geometry that is different than each of the second openings.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: April 30, 2019
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Kaushik Alayavalli, Xinhai Han, Praket P. Jha, Masaki Ogata, Zhijun Jiang, Allen Ko, Ndanka O. Mukuti, Thuy Britcher, Amit Kumar Bansal, Ganesh Balasubramanian, Juan Carlos Rocha-Alvarez, Bok Hoen Kim
  • Patent number: 10246772
    Abstract: A method for forming a high aspect ratio feature is disclosed. The method includes depositing one or more silicon oxide/silicon nitride containing stacks on a substrate by depositing a first film layer on the substrate from a first plasma and depositing a second film layer having a refractive index on the first film layer from a second plasma. A predetermined number of first film layers and second film layers are deposited on the substrate. The first film layer and the second film layer are either a silicon oxide layer or a silicon nitride layer and the first film layer is different from the second film layer. The method further includes depositing a third film layer from a third plasma and depositing a fourth film layer on the third film layer from a fourth plasma. The fourth film layer has a refractive index greater than the first refractive index.
    Type: Grant
    Filed: March 8, 2016
    Date of Patent: April 2, 2019
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Praket P. Jha, Allen Ko, Xinhai Han, Thomas Jongwan Kwon, Bok Hoen Kim, Byung Ho Kil, Ryeun Kim, Sang Hyuk Kim
  • Publication number: 20170162417
    Abstract: Techniques are disclosed for methods and apparatuses of an electrostatic chuck suitable for operating at high operating temperatures. In one example, a substrate support assembly is provided. The substrate support assembly includes a substantially disk-shaped ceramic body having an upper surface, a cylindrical sidewall, and a lower surface. The upper surface is configured to support a substrate thereon for processing the substrate in a vacuum processing chamber. The cylindrical sidewall defines an outer diameter of the ceramic body. The lower surface is disposed opposite the upper surface. An electrode is disposed in the ceramic body. A circuit is electrically connected to the electrode. The circuit includes a DC chucking circuit, a first RF drive circuit, and a second RF dive circuit. The DC chucking circuit, the first RF drive circuit and the second RF drive circuit are electrically coupled with the electrode.
    Type: Application
    Filed: December 6, 2016
    Publication date: June 8, 2017
    Inventors: Zheng John YE, Hiroji HANAWA, Juan Carlos ROCHA-ALVAREZ, Pramit MANNA, Michael Wenyoung TSIANG, Allen KO, Wenjiao WANG, Yongjing LIN, Prashant Kumar KULSHRESHTHA, Xinhai HAN, Bok Hoen KIM, Kwangduk Douglas LEE, Karthik Thimmavajjula NARASIMHA, Ziqing DUAN, Deenesh PADHI
  • Publication number: 20160322200
    Abstract: A method and apparatus for a dual-channel showerhead is provided. In one embodiment the showerhead comprises a body comprising a conductive material having a plurality of first openings formed therethrough comprising a first gas channel and a plurality of second openings formed therethrough comprising a second gas channel that is fluidly separated from the first gas channel, wherein each of the first openings having a geometry that is different than each of the second openings.
    Type: Application
    Filed: April 29, 2016
    Publication date: November 3, 2016
    Inventors: Kaushik ALAYAVALLI, Xinhai HAN, Praket P. JHA, Masaki OGATA, Zhijun JIANG, Allen KO, Ndanka O. MUKUTI, Thuy BRITCHER, Amit Kumar BANSAL, Ganesh BALASUBRAMANIAN, Juan Carlos ROCHA-ALVAREZ, Bok Hoen KIM
  • Publication number: 20160293609
    Abstract: Implementations of the present disclosure generally relate to thin films incorporating high aspect ratio feature definitions and methods for forming the same. As gate height increases, 3D NAND gate stacks are subject to higher aspect ratio etching. Due to the current limitations of etching techniques, the vertical etch profile typically tapers as the depth into the gate stack increases. The inventors have devised a unique deposition scheme that compensates for etch performance degradation in deep trenches by a novel plasma-enhanced chemical vapor deposition (PECVD) film deposition method. The inventors have found that by grading various properties (e.g., refractive index, stress of the film, dopant concentration in the film) of the as-deposited films (e.g., silicon nitride) a more uniform etch profile can be achieved by compensating for variations in both dry and wet etch rates.
    Type: Application
    Filed: March 8, 2016
    Publication date: October 6, 2016
    Inventors: Praket P. JHA, Allen KO, Xinhai HAN, Thomas Jongwan KWON, Bok Hoen KIM, Byung Ho KIL, Ryeun KIM, Sang Hyuk KIM
  • Publication number: 20070106000
    Abstract: In a method of isolating a polymer blend from solution, a homogeneous solution including a poly(arylene ether), a poly(alkenyl aromatic), and a solvent is combined with an anti-solvent to form a dispersion containing solid particles. The solid particles have improved handling properties compared to particles formed from precipitation of the poly(arylene ether) alone.
    Type: Application
    Filed: November 10, 2005
    Publication date: May 10, 2007
    Inventors: Hua Guo, Allen Ko, Geoffrey Riding, John Rowe
  • Publication number: 20050228136
    Abstract: A thermoplastic composition comprising recovered poly(arylene ether), less than or equal to 0.1 weight percent based on the total weight of the thermoplastic composition of a second recovered thermoplastic that gives off greater than or equal to 10 percent by mass of volatiles at a processing temperature for the thermoplastic composition; 0.025 to 4.0 weight percent, based on the total weight of the thermoplastic composition, of a third recovered thermoplastic selected from the group consisting of polyolefin, acrylonitrile-butadiene-styrene, polycarbonate, polycarbonate/acrylonitrile-butadiene-styrene blend, polymethyl methacrylate, polyamide, polyester, polycarbonate/polyester blend and combinations of two or more of the foregoing third recovered thermoplastics, wherein combinations of two or more of the foregoing third recovered thermoplastics are present in an amount of less than or equal to 10 weight percent, based on the total weight of the thermoplastic composition; and an optional virgin thermoplastic.
    Type: Application
    Filed: January 10, 2005
    Publication date: October 13, 2005
    Inventors: Allen Ko, Michael Todt