Patents by Inventor Shien Cho

Shien Cho 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: 9343319
    Abstract: First, a product to be inspected is prepared. The product to be inspected includes a substrate and a first film formed on the substrate. TDS is performed while the temperature of the product to be inspected is raised to 1,000° C. or higher, and the quality of the product to be inspected is determined by checking for the presence or absence of a peak at 1,000° C. or higher. Meanwhile, the substrate is, for example, a semiconductor substrate such as a silicon substrate. In addition, the rate of temperature rise is, for example, equal to or higher than 40° C./min and equal to or lower than 80° C./min. The upper limit of the temperature of TDS is, for example, 1,300° C.
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: May 17, 2016
    Assignee: Renesas Electronics Corporation
    Inventors: Shien Cho, Takahiro Hara, Kenichi Ito
  • Patent number: 9082704
    Abstract: A semiconductor memory device has a cover film (5), between a memory cell (gate electrode 4, and source and drain regions 2a and 2b) and an interlayer insulating film (6), the cover film covering the memory cell, wherein the cover film (5) has a hydrogen storage film (5a) that is a coating film on a surface of a silicon nitride film (5b), and in addition, has a hydrogen storage film (5c) on a bottom surface of the silicon nitride film (5b). The hydrogen storage films (5a and 5b) are silicon nitride oxide films that include Si2N2O. By suppressing diffusion of hydrogen atoms to a memory cell from an interlayer insulating film, reliability of operation of the memory cell is improved.
    Type: Grant
    Filed: April 1, 2009
    Date of Patent: July 14, 2015
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventor: Shien Cho
  • Publication number: 20150125969
    Abstract: First, a product to be inspected is prepared. The product to be inspected includes a substrate and a first film formed on the substrate. TDS is performed while the temperature of the product to be inspected is raised to 1,000° C. or higher, and the quality of the product to be inspected is determined by checking for the presence or absence of a peak at 1,000° C. or higher. Meanwhile, the substrate is, for example, a semiconductor substrate such as a silicon substrate. In addition, the rate of temperature rise is, for example, equal to or higher than 40° C./min and equal to or lower than 80° C./min. The upper limit of the temperature of TDS is, for example, 1,300° C.
    Type: Application
    Filed: November 3, 2014
    Publication date: May 7, 2015
    Applicant: RENESAS ELECTRONICS CORPORATION
    Inventors: Shien CHO, Takahiro HARA, Kenichi ITO
  • Patent number: 8131492
    Abstract: A method of directly measuring hydrogen permeability of a film is provided. The method of evaluating a film includes acquiring, with respect to a specimen including a plurality of films stacked on each other, ion dose-dependence data of intensity of ?-beam generated by hydrogen resonant nuclear reaction, and fitting the data with a functional equation of the ion dose.
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: March 6, 2012
    Assignees: Renesas Electronics Corporation, The Foundation for the Promotion of Industrial Science
    Inventors: Shien Cho, Markus Wilde, Katsuyuki Fukutani
  • Patent number: 8063435
    Abstract: A semiconductor memory in which a gate insulating film (tunnel insulating film) in a memory cell provides higher operational reliability. The semiconductor memory includes an insulating film 3 between a silicon substrate 1 and a gate electrode 4. The insulating film 3 is composed of a silicon oxide film 3f, a silicon nitride film 3d and a silicon oxide film 3b, stacked in this order between the silicon substrate and the gate electrode from the side of the silicon substrate 1. There are provided hydrogen occluding films 3a, 3c and 3e on an interface between the silicon oxide film 3f and the silicon nitride film 3d, on an interface between the silicon nitride film 3d and the silicon oxide film 3b and on an interface between the silicon oxide film 3b and the gate electrode 4 (FIGS. 1A and 1B).
    Type: Grant
    Filed: April 2, 2009
    Date of Patent: November 22, 2011
    Assignee: Renesas Electronics Corporation
    Inventor: Shien Cho
  • Patent number: 7683420
    Abstract: A nonvolatile memory semiconductor device and a method for manufacturing thereof are provided to avoid deterioration of the tunnel insulating film to increase frequency of writing data on the nonvolatile memory semiconductor device and erasing thereof. Concentration of atomic nitrogen in a tunnel insulating film 151 of a nonvolatile memory semiconductor device 1 is 0.1 to 5 atomic %. In addition, larger amount of atomic nitrogen in the tunnel insulating film 151 is distributed primarily in the interface layer of the tunnel insulating film 151, and concentration of atomic nitrogen in the interface layer is 10 times or more higher than concentration of atomic nitrogen in other portion of the tunnel insulating film 151. Further, density per unit area of atomic nitrogen in the surface of the tunnel insulating film 151 contacting with the floating gate is equal to or lower than 4×1014 atoms/cm2.
    Type: Grant
    Filed: July 26, 2006
    Date of Patent: March 23, 2010
    Assignee: NEC Electronics Corporation
    Inventor: Shien Cho
  • Publication number: 20090250744
    Abstract: A semiconductor memory device has a cover film (5), between a memory cell (gate electrode 4, and source and drain regions 2a and 2b) and an interlayer insulating film (6), the cover film covering the memory cell, wherein the cover film (5) has a hydrogen storage film (5a) that is a coating film on a surface of a silicon nitride film (5b), and in addition, has a hydrogen storage film (5c) on a bottom surface of the silicon nitride film (5b). The hydrogen storage films (5a and 5b) are silicon nitride oxide films that include Si2N2O. By suppressing diffusion of hydrogen atoms to a memory cell from an interlayer insulating film, reliability of operation of the memory cell is improved.
    Type: Application
    Filed: April 1, 2009
    Publication date: October 8, 2009
    Applicant: NEC Electronics Corporation
    Inventor: Shien Cho
  • Publication number: 20090194809
    Abstract: A semiconductor memory in which a gate insulating film (tunnel insulating film) in a memory cell provides higher operational reliability. The semiconductor memory includes an insulating film 3 between a silicon substrate 1 and a gate electrode 4. The insulating film 3 is composed of a silicon oxide film 3f, a silicon nitride film 3d and a silicon oxide film 3b, stacked in this order between the silicon substrate and the gate electrode from the side of the silicon substrate 1. There are provided hydrogen occluding films 3a, 3c and 3e on an interface between the silicon oxide film 3f and the silicon nitride film 3d, on an interface between the silicon nitride film 3d and the silicon oxide film 3b and on an interface between the silicon oxide film 3b and the gate electrode 4 (FIGS. 1A and 1B).
    Type: Application
    Filed: April 2, 2009
    Publication date: August 6, 2009
    Applicant: NEC ELECTRONICS CORPORATION
    Inventor: Shien CHO
  • Publication number: 20080183420
    Abstract: A method of directly measuring hydrogen permeability of a film is provided. The method of evaluating a film includes acquiring, with respect to a specimen including a plurality of films stacked on each other, ion dose-dependence data of intensity of ?-beam generated by hydrogen resonant nuclear reaction, and fitting the data with a functional equation of the ion dose.
    Type: Application
    Filed: December 26, 2007
    Publication date: July 31, 2008
    Applicants: NEC ELECTRONICS CORPORATION, THE FOUNDATION FOR THE PROMOTION OF INDUSTRIAL SCIENCE
    Inventors: Shien Cho, Markus Wilde, Katsuyuki Fukutani
  • Publication number: 20070291216
    Abstract: An exemplary liquid crystal display device includes a first substrate, a second substrate being disposed to spatially oppose to the first substrate and a sealant. The second substrate includes a base and a black matrix with a patterned structure. The sealant is formed between the first substrate and the patterned structure of the black matrix.
    Type: Application
    Filed: June 18, 2007
    Publication date: December 20, 2007
    Inventors: Chia-Ming Chan, Hung-Shien Cho, Kun-Hsing Hsiao
  • Publication number: 20070023814
    Abstract: A nonvolatile memory semiconductor device and a method for manufacturing thereof are provided to avoid deterioration of the tunnel insulating film to increase frequency of writing data on the nonvolatile memory semiconductor device and erasing thereof. Concentration of atomic nitrogen in a tunnel insulating film 151 of a nonvolatile memory semiconductor device 1 is 0.1 to 5 atomic %. In addition, larger amount of atomic nitrogen in the tunnel insulating film 151 is distributed primarily in the interface layer of the tunnel insulating film 151, and concentration of atomic nitrogen in the interface layer is 10 times or more higher than concentration of atomic nitrogen in other portion of the tunnel insulating film 151. Further, density per unit area of atomic nitrogen in the surface of the tunnel insulating film 151 contacting with the floating gate is equal to or lower than 4×1014 atoms/cm2.
    Type: Application
    Filed: July 26, 2006
    Publication date: February 1, 2007
    Inventor: Shien Cho