Patents by Inventor Naotaka Maeda

Naotaka Maeda 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).

  • Publication number: 20240075438
    Abstract: An agitator includes: an agitation tank that accommodates a fluid to be processed containing particles; a flow blade that agitates the fluid to be processed accommodated in the agitation tank; and a shear blade disposed inside the flow blade at a bottom of the agitation tank to disperse the particles. The shear blade 16 includes a base portion rotating around a predetermined axis and a plurality of blades provided at an edge of the base portion. An angle formed on a downstream side in a rotation direction of the base portion between the blade and a tangent line to an outer periphery of the base portion and each of the blades is 15 degrees or more and 60 degrees or less.
    Type: Application
    Filed: November 10, 2023
    Publication date: March 7, 2024
    Inventors: Naotaka MAEDA, Junich Tsubono
  • Patent number: 7523436
    Abstract: An ASIC includes a function layer formed with plural universal logic cells, a common layer formed with conductive strips connected to the universal logic cells and common to other ASICs and a customized layer having at least two metallization layers assigned to conductive strips extending in certain directions parallel to one another and other conductive strips extending in perpendicular directions to the certain directions, respectively, and an inter-layered insulating layer formed with conductive plugs selectively connected between the conductive strips and the other conductive strips, wherein the conductive strips have respective values of length such that the conductive plugs are located on both ends thereof, whereby the conductive strips, other conductive strips and the conductive plugs form plural signal paths reduced in total contact resistance and parasitic capacitance.
    Type: Grant
    Filed: March 22, 2006
    Date of Patent: April 21, 2009
    Assignee: NEC Electronics Corporation
    Inventors: Masaharu Mizuno, Naotaka Maeda
  • Publication number: 20060189041
    Abstract: An ASIC includes a function layer formed with plural universal logic cells, a common layer formed with conductive strips connected to the universal logic cells and common to other ASICs and a customized layer having at least two metallization layers assigned to conductive strips extending in certain directions parallel to one another and other conductive strips extending in perpendicular directions to the certain directions, respectively, and an inter-layered insulating layer formed with conductive plugs selectively connected between the conductive strips and the other conductive strips, wherein the conductive strips have respective values of length such that the conductive plugs are located on both ends thereof, whereby the conductive strips, other conductive strips and the conductive plugs form plural signal paths reduced in total contact resistance and parasitic capacitance.
    Type: Application
    Filed: March 22, 2006
    Publication date: August 24, 2006
    Inventors: Masaharu Mizuno, Naotaka Maeda
  • Patent number: 7047514
    Abstract: An ASIC includes a function layer formed with plural universal logic cells, a common layer formed with conductive strips connected to the universal logic cells and common to other ASICs and a customized layer having at least two metallization layers assigned to conductive strips extending in certain directions parallel to one another and other conductive strips extending in perpendicular directions to the certain directions, respectively, and an inter-layered insulating layer formed with conductive plugs selectively connected between the conductive strips and the other conductive strips, wherein the conductive strips have respective values of length such that the conductive plugs are located on both ends thereof, whereby the conductive strips, other conductive strips and the conductive plugs form plural signal paths reduced in total contact resistance and parasitic capacitance.
    Type: Grant
    Filed: April 3, 2002
    Date of Patent: May 16, 2006
    Assignee: NEC Electronics Corporation
    Inventors: Masaharu Mizuno, Naotaka Maeda
  • Patent number: 6753702
    Abstract: The master slice type semiconductor integrated circuit includes sequential circuit cells (2) and combinational circuit cells (3), which are alternately arranged in an inner core area on a semiconductor chip (1), and a plurality of selective driving elements (MC101 to MC108, MC201 to MC216 and MC301 to MC316), which are connected in a shape of a tree, for selectively distributing a poliphase clock signal for each division area formed by uniformly dividing the inner core area. The plurality of selective driving elements are placed and connected on the semiconductor chip such that load and wiring length between the sequential circuit cells within the respective division areas and input terminals to which the poliphase clock signal is inputted are equal.
    Type: Grant
    Filed: August 29, 2002
    Date of Patent: June 22, 2004
    Assignee: NEC Electronics Corporation
    Inventors: Masaharu Mizuno, Shigeki Sakai, Naotaka Maeda
  • Publication number: 20030051221
    Abstract: The master slice type semiconductor integrated circuit includes sequential circuit cells (2) and combinational circuit cells (3), which are alternately arranged in an inner core area on a semiconductor chip (1), and a plurality of selective driving elements (MC101 to MC108, MC201 to MC216 and MC301 to MC316), which are connected in a shape of a tree, for selectively distributing a poliphase clock signal for each division area formed by uniformly dividing the inner core area. The plurality of selective driving elements are placed and connected on the semiconductor chip such that load and wiring length between the sequential circuit cells within the respective division areas and input terminals to which the poliphase clock signal is inputted are equal.
    Type: Application
    Filed: August 29, 2002
    Publication date: March 13, 2003
    Applicant: NEC CORPORATION
    Inventors: Masaharu Mizuno, Shigeki Sakai, Naotaka Maeda
  • Publication number: 20020145444
    Abstract: An ASIC includes a function layer formed with plural universal logic cells, a common layer formed with conductive strips connected to the universal logic cells and common to other ASICs and a customized layer having at least two metallization layers assigned to conductive strips extending in certain directions parallel to one another and other conductive strips extending in perpendicular directions to the certain directions, respectively, and an inter-layered insulating layer formed with conductive plugs selectively connected between the conductive strips and the other conductive strips, wherein the conductive strips have respective values of length such that the conductive plugs are located on both ends thereof, whereby the conductive strips, other conductive strips and the conductive plugs form plural signal paths reduced in total contact resistance and parasitic capacitance.
    Type: Application
    Filed: April 3, 2002
    Publication date: October 10, 2002
    Applicant: NEC CORPORATION
    Inventors: Masaharu Mizuno, Naotaka Maeda
  • Patent number: 6009248
    Abstract: A delay optimization system including a layout processing unit for receiving the input of circuit specification of a target circuit to conduct layout, as well as extracting wiring information, an optimization processing unit for conducting optimization with reference to the wiring information, as well as generating circuit change information and inserted buffer information, and a constraints violations determining unit for determining whether a circuit generated as a result of the layout by the layout processing unit satisfies delay constraints set for the target circuit, the layout processing unit executing initial layout based only on circuit information synthesized based on the circuit specification of the target circuit and re-layout with reference to the circuit change information and inserted buffer information generated by the optimization processing unit.
    Type: Grant
    Filed: May 30, 1997
    Date of Patent: December 28, 1999
    Assignee: NEC Corporation
    Inventors: Koichi Sato, Hideyuki Emura, Naotaka Maeda, Masamichi Kawarabayashi
  • Patent number: 5949691
    Abstract: A logic circuit verification device comprising a data input section to read the circuit data and the circuit information of the logic circuits to be verified and converts them into the intermediate format, a corresponding point detection section to extract and output the information about the corresponding points using the corresponding point detection algorithm, a circuit partitioning section to read the intermediate format data and partition the logic circuits according to the corresponding point information obtained by the corresponding point detection section so as to prepare circuit data of the subcircuits and a equivalence checking section to read the circuit data of the subcircuits, determine the subcircuits to be compared with referring to the corresponding point information obtained by the corresponding point detection section and comparatively compares the circuit data of the subcircuits.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: September 7, 1999
    Assignee: NEC Corporation
    Inventors: Hitoshi Kurosaka, Hideyuki Emura, Naotaka Maeda