Patents by Inventor Ken Tsutsui

Ken Tsutsui 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: 4990981
    Abstract: A thin film transistor is disclosed, which comprises a gate electrode, a gate insulating layer, a semiconductor layer, a source electrode, and a drain electrode, which are disposed on a predetermined substrate, and which is so constructed that the semiconductor layer doesn't exist in any regions, to which strong electric field parallel to said substrate is applied. Besides this thin film transistor a liquid crystal display device using it is disclosed. The thin film transistor according to the present invention has a small increase in the off level current due to photo-current and it is suitable for driving pixels in the liquid crystal display device.
    Type: Grant
    Filed: January 13, 1989
    Date of Patent: February 5, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Yasuo Tanaka, Haruo Matsumaru, Hideaki Yamamoto, Toshihisa Tsukada, Ken Tsutsui, Yoshiyuki Kaneko
  • Patent number: 4430400
    Abstract: Disclosed is a method of producing color filters, which comprises forming a layer of an organic polymeric material having a predetermined light-sensitive characteristic on a substrate, exposing this layer to a predetermined pattern, developing the exposed layer to form a filter base and dyeing the filter base, wherein after the development of the exposed layer, the layer is wetted with a dehydrating solution to remove water from the filter base. By this dehydrating treatment, the filter base can be processed with very high precision.
    Type: Grant
    Filed: September 21, 1981
    Date of Patent: February 7, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Toshio Nakano, Yoshio Taniguchi, Ken Tsutsui, Akira Sasano, Tadeo Kaneko, Akiya Izumi, Michiaki Hashimoto
  • Patent number: 4412236
    Abstract: A color solid-state imager comprising a semiconductor body which has a photoelectric conversion function and which includes at least photosensitive elements and switching elements, and predetermined color filters which are formed on the body; characterized in that a light absorbing layer is disposed at least over a vicinity of an output terminal of each switching element. The contours of the color filters can be accurately formed, and unnecessary light can be intercepted to stabilize the electrical characteristics of the solid-state imager.
    Type: Grant
    Filed: August 21, 1980
    Date of Patent: October 25, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Akira Sasano, Toshio Nakano, Ken Tsutsui, Michiaki Hashimoto, Tadao Kaneko, Norio Koike, Akiya Izumi
  • Patent number: 4395629
    Abstract: According to a solid-state imager of this invention, in case where a plurality of color filters are disposed on a semiconductor body for the solid-state imager including a plurality of photosensitive regions and where the color filter of a third color is constructed by the overlapping between filter members of a first color and a second color, that one of the filter members which has a spectral transmittance substantially transmitting light for exposure for use in forming the filter members is arranged as a lower layer closer to a substrate of the semiconductor body. Even when the filter members are formed by the exposure process, a solid-state imager having good characteristics can be manufactured.
    Type: Grant
    Filed: December 10, 1980
    Date of Patent: July 26, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Akira Sasano, Toshio Nakano, Ken Tsutsui, Michiaki Hashimoto, Tadao Kaneko, Yoshio Taniguchi, Haruo Matsumaru, Akiya Izumi
  • Patent number: 4331506
    Abstract: A method of manufacturing a target of an image pickup tube comprising the steps of: forming a plurality of groups of transparent conductive signal electrodes on a transparent insulating base plate; forming a first layer on at least a portion constituting an image area of the image pickup tube, said first layer being substantially insoluble in etching liquid used for etching an insulating layer to constitute an intermediate layer insulator in a double layered interconnection structure; forming, after formation of said first layer, an insulating layer to constitute said intermediate-layer insulator; removing a predetermined portion of said insulating layer, removing said first layer together with said insulating layer located thereon; forming bus bars; and forming a photoconductive layer on said plurality of groups of the transparent conductive signal electrodes.This invention provides an excellent method for mass production.
    Type: Grant
    Filed: December 2, 1980
    Date of Patent: May 25, 1982
    Assignees: Hitachi, Ltd., Hitachi Denshi Kabushiki Kaisha
    Inventors: Akira Sasano, Toshio Nakano, Ken Tsutsui, Chushiro Kusano, Tadaaki Hirai, Eiichi Maruyama
  • Patent number: 4273812
    Abstract: A method of producing material patterns in which at least one substrate is fixed together with a mask to a substrate holder, and an evaporated film of desired substances is formed on the surface of the substrate by means of evaporation sources provided to confront the substrate. The mask is fabricated to have a plurality of reinforcing bridges formed in the desired portions of the mask openings of desired shape formed in the mask. The mask is held spaced from the substrate by a small distance during the evaporation, so that the evaporation may be effected at least through two pattern openings defined at both sides of each bridge.
    Type: Grant
    Filed: February 1, 1979
    Date of Patent: June 16, 1981
    Assignees: Hitachi, Ltd., Hitachi Denshi Kabushiki Kaisha
    Inventors: Ken Tsutsui, Akira Sasano, Toshio Nakano, Haruo Matsumaru, Eiichi Maruyama
  • Patent number: 4206384
    Abstract: For obtaining an improved characteristic, particularly an improved after-image characteristic of image pickup tubes, a target of the tube is produced by at first forming a striped transparent conductive film on a substrate such that the angle formed between the surface of the substrate and the edges of cross-section of the film falls within a range below, and then forming a photoconductive film on the striped transparent conductive film. In order to control the angle formed between the surface of the substrate and the side edges of cross-section of the transparent conductive film, at first a mask of a predetermined pattern is formed on the transparent conductive film with a posi-type photosensitive material, and is subjected to an ultraviolet ray. The mask is then heat treated so that the side edges of the mask may be suitably tapered. Finally, the transparent conductive film is formed by sputter etching.
    Type: Grant
    Filed: February 28, 1978
    Date of Patent: June 3, 1980
    Assignees: Hitachi, Ltd., Hitachi Denshi Kabushiki Kabisha
    Inventors: Akira Sasano, Toshio Nakano, Haruo Matsumaru, Ken Tsutsui, Tadaaki Hirai, Eiich Maruyama
  • Patent number: 4107568
    Abstract: A face plate for a color pick-up tube which comprises a transparent substrate, stripe-like color filters formed on the transparent substrate, a protection layer deposited so as to cover the stripe color filters and the exposed portions of the transparent substrate, stripe-like transparent electrodes formed on predetermined portions of the protection layer, a photoconductive layer, bus bar electrodes and an insulation layer.The insulation layer and the protection layer are, respectively, formed of different materials which have different resistances to an etching solution, whereby the stripe-like filters are protected from the adverse influence of the etching solution used to form the insulation layer by a photoetching treatment.
    Type: Grant
    Filed: November 15, 1974
    Date of Patent: August 15, 1978
    Assignees: Hitachi, Ltd., Hitachi Electronics Ltd.
    Inventors: Toshio Nakano, Akira Sasano, Ken Tsutsui, Haruo Matumaru
  • Patent number: 3997810
    Abstract: A color pick-up tube face plate with shading films is disclosed. These shading films are stripe-shaded opaque films, and are formed between the transparent glass plate and the stripe-shaped color filters. As the boundary portions of all the filters are positioned on these shading films, the light incidented around the boundary portions is hindered by the shading films. For this reason, light reflection or scattering around the boundary portions is effectively eliminated, and a pure high quality color picture is obtained.
    Type: Grant
    Filed: December 4, 1975
    Date of Patent: December 14, 1976
    Assignees: Hitachi, Ltd., Hitachi Electronics Co., Ltd.
    Inventors: Ken Tsutsui, Akira Sasano, Toshio Nakano, Haruo Matsumaru, Takeo Nishimura