Patents by Inventor Masahiko Ikeno

Masahiko Ikeno 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: 6636824
    Abstract: An apparatus for inspecting a semiconductor device comprises a wafer stage (2), a stage driving unit (3), a charged-particle beam irradiation unit (4), an electronic optical system (11), a charged-particle beam control unit (12), a secondary-electron detection unit (5), an amplifier (7), a secondary-electron intensity comparison unit (8), a database (9) connected to an output of the secondary-electron intensity comparison unit (8), a PC (10) connected to an output of the database (9) and a main control unit (6) connected to the output of the database (9) and an output of the PC (10), whose output is connected to the stage driving unit (3), the charged-particle beam irradiation unit (4) and the charged-particle beam control unit (12). The database (9) stores inspection results and inspection addresses on m inspection regions (15) with strong possibility of having opening failures of contact holes (16) in each of a plurality of semiconductor wafers (1).
    Type: Grant
    Filed: May 8, 2000
    Date of Patent: October 21, 2003
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kouetsu Sawai, Masahiko Ikeno, Toshiharu Katayama
  • Publication number: 20030012422
    Abstract: A width (25) of a side-face image of a pattern top layer to be found in an SEM image (d) obtained by review with a wafer (3) tilted can be calculated from the actual thickness of the pattern top layer and the tilt angle of the wafer (3). An auto defect review/classification system detects an image having the same width as the calculated value, to recognize an image (22) to be a side-face image of the pattern top layer. Further, if the side-face image (22) of the pattern top layer is found, it is recognized that an image (23) therebelow should be a side-face image of a pattern second layer. By recognizing the images of the respective layers in the pattern, it becomes possible to specify a layer in which a detected defect lies in defect detection performed later.
    Type: Application
    Filed: April 1, 2002
    Publication date: January 16, 2003
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Kouetsu Sawai, Masahiko Ikeno
  • Publication number: 20020180110
    Abstract: It is an object of the present invention to form a marked dot with excellent visibility while inhibiting adherence to a semiconductor wafer of particles. A semiconductor wafer (1) is held on a wafer stage (2), and a laser beam (3) is radiated from above onto a predetermined marking position on the semiconductor wafer (1). A frame-like exhaust unit (10) having a frame form that surrounds an area (marking area) in which marking is performed by the laser beam (3) is provided adjacently over the semiconductor wafer (1). The exhaust unit (10) sucks a gas existing in the inside thereof, which enables effective collection of the particles generated when the laser beam (3) has high intensity.
    Type: Application
    Filed: November 1, 2001
    Publication date: December 5, 2002
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Toru Yamaguchi, Masahiko Ikeno
  • Patent number: 6437862
    Abstract: A defect inspection apparatus includes a first main controller for producing a reflectance distribution in a wafer surface to generate illumination light control data, based on the reflectance distribution, the illumination light control data being control data for adjusting the intensity of illumination light so that the intensity of reflected light from all locations in the wafer surface reaches an average intensity value, and a filter controller for inputting a filter control signal to a filter, based on the illumination light control data. The transmittance or reflectance of the filter for illumination light is controlled by the filter control signal. Consequently, the intensity of light reflected from a wafer to be inspected is controlled to provide uniformity in the wafer surface. Therefore, the defect inspection apparatus detects a defect occurring in the object to be inspected with high accuracy.
    Type: Grant
    Filed: December 9, 1999
    Date of Patent: August 20, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoko Miyazaki, Masahiko Ikeno
  • Patent number: 6016562
    Abstract: An ordinary user can easily learn a step at which a problem occurs during semiconductor manufacturing processes and improve the yield of manufacturing products and the quality of the products. At a certain in-line inspection step, a CPU (3) stores data signals (V1) taken by an inspection apparatus (1) into a memory (2), and reads a result (V6) obtained at a precedent step and stores the same in the memory (2). The CPU (3) reads stored data signals (V2) from the memory (2), performs comparison or referral on data about defects which are detected at a current step and the result (V6) regarding the precedent step, and generates a defect data analysis processing result signal (V5) regarding the current step. The result (V5) consists of disappeared defect data, common defect data, new defect data to which a label of a current step number is assigned, and reappeared defect data.
    Type: Grant
    Filed: August 28, 1997
    Date of Patent: January 18, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoko Miyazaki, Nobuyoshi Hattori, Junko Izumitani, Masahiko Ikeno
  • Patent number: 5264246
    Abstract: A spin coating method includes the steps of applying a coating material on the surface of a substrate, rotating the substrate about a first axis, and revolving the substrate about a second axis while tilting the substrate towards the second axis. The rotating step spreads the coating material over the surface of the substrate, and the step of revolving while tilting the substrate smoothens the surface of the coating material. At least the rotating step may be performed in an atmosphere containing a solvent vapor. A spin coating apparatus includes a nozzle for applying a coating material to the surface of a substrate, a chuck for rotating the substrate about a first axis, a support arm for revolving the substrate about a second axis, and a tilting mechanism for tilting the surface of the substrate towards the center of the second axis while the substrate is revolving.
    Type: Grant
    Filed: January 21, 1992
    Date of Patent: November 23, 1993
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Masahiko Ikeno
  • Patent number: 5155060
    Abstract: A photoresist of sufficient thickness to fill a scribe line is applied to an entire substrate. The photoresist is exposed through a photomask having a pattern corresponding to the scribe line and then developed. A photosensitized gelatin is applied by spincoating on the flat substrate obtained in this process, pattern and then dyed, to obtain a color filter array.
    Type: Grant
    Filed: February 19, 1991
    Date of Patent: October 13, 1992
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masahiko Ikeno, Hideo Saeki, Hiroshi Kawashima
  • Patent number: 5135891
    Abstract: A photoresist of sufficient thickness to fill a scribe line is applied on an entire substrate. Then, the photoresist is exposed through a photomask having a pattern corresponding to the scribe line and is thereafter developed. A photosensitized gelatin is applied by spin-coating on the flat substrate obtained in this process, patterned, and then dyed, to obtain a color filter array.
    Type: Grant
    Filed: January 17, 1989
    Date of Patent: August 4, 1992
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masahiko Ikeno, Hideo Saeki, Hiroshi Kawashima
  • Patent number: 5095848
    Abstract: A spin coating method includes the steps of applying a coating material on the surface of a substrate, rotating the substrate about a first axis, and revolving the substrate about a second axis while tilting the substrate towards the second axis. The rotating step spreads the coating material over the surface of the substrate, and the step of revolving while tilting the substrate smoothens the surface of the coating material. At least the rotating step may be performed in an atmosphere containing a solvent vapor. A spin coating apparatus includes a nozzle for applying a coating material to the surface of a substrate, a chuck for rotating the substrate about a first axis, a support arm for revolving the substrate about a second axis, and a tilting mechanism for tilting the surface of the substrate towards the center of the second axis while the substrate is revolving.
    Type: Grant
    Filed: April 30, 1990
    Date of Patent: March 17, 1992
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Masahiko Ikeno
  • Patent number: 4987477
    Abstract: A solid state imaging device has solid-state imaging-device chips each having a picture-element array and bonding pads, chip carriers each having long sides longer than the solid-state imaging-device chip and terminals electrically connected to corresponding bonding pads on the chip, a package board which carries the chip carriers, and external leads provided on the package board and electrically connected to the respective terminals of the chip carriers. In a method of assembling such a solid state imaging device, a plurality of solid-state imaging-device chips are mounted on respective chip carriers, and a plurality of imaging units are formed by electrically connecting the terminals of each chip carrier to the corresponding bonding pads. The imaging units are then arranged on the package board and the terminals of the imaging units are connected to the external leads, respectively.
    Type: Grant
    Filed: November 2, 1989
    Date of Patent: January 22, 1991
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Masahiko Ikeno
  • Patent number: 4960658
    Abstract: A color filter dyeing apparatus for dyeing a color filter formed on a substrate comprises a chuck for holding the substrate on which the color filter is mounted, a dyeing solution receptacle in intimate engagement, by means of a sealing member, with the chuck or the substrate, and forming a container for containing the color filter therein, an inlet for supplying the dyeing solution into the container, and means for discharging the dyeing solution from the container.
    Type: Grant
    Filed: October 21, 1988
    Date of Patent: October 2, 1990
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masahiko Ikeno, Hideo Saeki
  • Patent number: 4886012
    Abstract: A spin coating apparatus has a refrigerated container which maintains a coating liquid that contains thermosetting materials or thermal crosslinking agents at a temperature which is sufficiently below the temperature of a substrate on which it is to be coated such that the coating liquid will not set. A heat exchanger heats the coating liquid from the reduced temperature of the refrigerated container to the temperature of the substrate just before the coating liquid is applied to the substrate.
    Type: Grant
    Filed: June 27, 1988
    Date of Patent: December 12, 1989
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masahiko Ikeno, Hiroshi Kawashima, Osamu Kaneda
  • Patent number: 4821675
    Abstract: A color filter dyeing apparatus for dyeing a color filter formed on a substrate comprises a chuck for holding the substrate on which the color filter is mounted, a dyeing solution receptacle in intimate engagement, by means of a sealing member, with the chuck or the substrate, and forming a container for containing the color filter therein, an inlet for supplying the dyeing solution into the container, and means for discharging the dyeing solution from the container.
    Type: Grant
    Filed: December 12, 1986
    Date of Patent: April 18, 1989
    Assignee: Maeda & Associates
    Inventors: Masahiko Ikeno, Hideo Saeki