Patents by Inventor Masahiro Kuwamura

Masahiro Kuwamura 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: 6251743
    Abstract: Microstructures, including a plurality of spaced structural members which are bendable under an external force, undergo a treating method using a first treating liquid, to prevent permanent deformation, by removing the microstructure from the first treating liquid to an environment having a pressure less than atmospheric pressure; or moving the microstructure from the first treating liquid to a second treating liquid having a smaller surface tension than the first treating liquid, and then removing the microstructure from the second liquid; or drying the microstructure removed from the first treating liquid by exposing same to a liquid vapor having a smaller surface tension than the first treating liquid; or removing the microstructure from the first treating liquid to the atmosphere, and drying the microstructure using an energy beam of high intensity or an ultrasonic wave.
    Type: Grant
    Filed: May 5, 1998
    Date of Patent: June 26, 2001
    Assignees: Fujitsu Limited, Fujitsu VLSI Limited
    Inventors: Motoo Nakano, Hiroshi Nomura, Masaya Katayama, Toshimi Ikeda, Fumihiko Inoue, Junichi Ishikawa, Masahiro Kuwamura
  • Patent number: 5888633
    Abstract: A micro-structure including at least a first bendable member having first and second ends and being supported at the first end only, and either being spaced from a rigid component, or being spaced from a second bendable member also supported only at a first end thereof. The first member has a length L from the first end to the second end specified by one of the following equations: (a) for the first member adjacent to the rigid component: L<(2Edt.sup.3 /3P).sup.1/4, wherein E is a Young's modulus of a material of the first member; d is a distance of the space between the first member and the rigid component; t is a thickness of the first member; and P is an external pressure applied to the first member; or b) for the first member adjacent to the second member: L<(2Ed't.sup.3 /3P).sup.1/4, wherein E, t and P are as defined above; and d' is a distance of the space between the first and second members.
    Type: Grant
    Filed: March 12, 1997
    Date of Patent: March 30, 1999
    Assignee: Fujitsu Limited & Fujitsu VLSI Limited
    Inventors: Motoo Nakano, Hiroshi Nomura, Masaya Katayama, Toshimi Ikeda, Fumihiko Inoue, Junichi Ishikawa, Masahiro Kuwamura
  • Patent number: 5661340
    Abstract: A method for fabricating a dynamic random access memory comprises the steps of forming a diffusion region in a semiconductor substrate, providing an insulation layer on the semiconductor substrate, forming a contact hole in the insulation layer to expose the diffusion region at the contact hole, depositing a semiconductor layer on the insulation layer in the amorphous state such that the semiconductor layer establishes an intimate contact with the exposed diffusion region via the contact hole, patterning the semiconductor layer to form a capacitor electrode, depositing a dielectric film on the capacitor electrode such that said dielectric film covers the capacitor electrode; and depositing a semiconductor material to form an opposing electrode such that the opposing electrode buries the capacitor electrode underneath while establishing an intimate contact with the dielectric film that covers the capacitor electrode.
    Type: Grant
    Filed: October 26, 1993
    Date of Patent: August 26, 1997
    Assignee: Fujitsu Limited
    Inventors: Taiji Ema, Masaaki Higashitani, Toshimi Ikeda, Michiari Kawano, Hiroshi Nomura, Masaya Katayama, Masahiro Kuwamura
  • Patent number: 5652167
    Abstract: Micro-structures comprising at least a structural member, which is liable to be bent under an external force and formed so as to leave a space between the member and another member liable to be bent and/or other rigid component, are successfully treated using a treating liquid, without suffering permanent deformation resulting from the use of the treating liquid, by removing the micro-structures from the liquid to an environment having a pressure less than the atmospheric pressure; or displacing the micro-structures from the treating liquid to another treating liquid having a smaller surface tension than that of the former liquid, and then removing the micro-structures from the latter liquid; or drying the micro-structures removed from the treating liquid by exposing the same to vapor of a liquid having a smaller surface tension than that of the treating liquid; or removing the micro-structures from the treating liquid to the atmosphere, and drying them using an energy beam of high intensity or an ultrasonic
    Type: Grant
    Filed: June 29, 1993
    Date of Patent: July 29, 1997
    Assignees: Fujitsu Ltd., Fujitsu VLSI Ltd.
    Inventors: Motoo Nakano, Hiroshi Nomura, Masaya Katayama, Toshimi Ikeda, Fumihiko Inoue, Junichi Ishikawa, Masahiro Kuwamura