Patents by Inventor Yashuhito Takahashi

Yashuhito Takahashi 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: 6845184
    Abstract: Opto-electrical systems having electrical and optical interconnections formed in thin layers are disclosed. In one set of preferred embodiments, optical signals are conveyed between layers by respective vertical optical couplers disposed on the layers. In other preferred embodiments, optical signals are conveyed by stack optical waveguide coupling means. Yet other preferred embodiments have electrical via means formed in one or more layers to covey electrical signals between two or more layers.
    Type: Grant
    Filed: April 20, 1999
    Date of Patent: January 18, 2005
    Assignee: Fujitsu Limited
    Inventors: Tetsuzo Yoshimura, Yashuhito Takahashi, Masaaki Inao, Michael G. Lee, William Chou, Solomon I. Beilin, Wen-chou Vincent Wang, James J. Roman, Thomas J. Massingill
  • Patent number: 6706546
    Abstract: A method of constructing an electronic circuit assembly comprising forming at least one electrode on a substrate; forming a layer of undercladding material upon the substrate and over the electrode; and forming a wave guide core layer on the layer of cladding material. The wave guide layer is patterned to produce at least one optical wave guide and exposed undercladding material. The method of constructing further includes forming a layer of overcladding material upon the exposed undercladding material and over the optical wave guide; forming at least one via aperture through the overcladding material and the undercladding material; and disposing a conductive material in the via aperture to produce an electronic circuit assembly.
    Type: Grant
    Filed: January 8, 2001
    Date of Patent: March 16, 2004
    Assignee: Fujitsu Limited
    Inventors: Tetsuzo Yoshimura, Yashuhito Takahashi, Kiyoshi Kuwabara, Solomon I. Beilin, Michael Peters, Wen-Chou Vincent Wang, Masaaki Inao
  • Patent number: 6690845
    Abstract: Three-dimensional opto-electronic modules having a plurality of opto-electronic (O/E) layers, with optical signals being routed between O/E layers within one or more three-dimensional volumes, are disclosed. In preferred embodiments, the O/E layers are disposed over and above one another with at least one of their edges aligned to one another. At least two of the O/E layers have waveguides with ends near the aligned edges. A plurality of Zconnector arrays are disposed between the O/E layers and within the three-dimensional volumes to provide a plurality of Zdirection waveguides. A first vertical optical coupler couples light from one waveguide in one O/E layer to a Z-direction waveguide, and a second vertical optical coupler couples the light from the Z-direction waveguide to a second waveguide in a second O/E layer. In further preferred embodiments, segments of the Z-connector arrays are held by a holding unit.
    Type: Grant
    Filed: May 19, 2000
    Date of Patent: February 10, 2004
    Assignee: Fujitsu Limited
    Inventors: Tetsuzo Yoshimura, Yashuhito Takahashi, Masaaki Inao, Michael G. Lee, William Chou, Solomon I. Beilin, Wen-chou Vincent Wang, James J. Roman, Thomas J. Massingill
  • Patent number: 6611635
    Abstract: Disclosed is device and/or material integration into thin opto-electronic layers, which increase room for chip-mounting, and reduce the total system cost by eliminating the difficulty of optical alignment between opto-electronic devices and optical waveguides. Opto-electronic devices are integrated with optical waveguides in ultra thin polymer layers on the order of 1 &mgr;m to 250 &mgr;m in thickness.
    Type: Grant
    Filed: April 20, 1999
    Date of Patent: August 26, 2003
    Assignee: Fujitsu Limited
    Inventors: Tetsuzo Yoshimura, Yashuhito Takahashi, Masaaki Inao, Michael G. Lee, William Chou, Solomon I. Beilin, Wen-chou Vincent Wang, James J. Roman, Thomas J. Massingill
  • Patent number: 6343171
    Abstract: Opto-electrical systems having electrical and optical interconnections formed in thin layers with thin-film active devices are disclosed. In one embodiment, optical connections are made between the edge of one substrate and the surface of another substrate with the use of photorefractive materials. In another embodiment, the optical connection is made by separating a optical film from the first substrate and coupling the first substrate and the optical film to separate receptacles located on the second substrate. Film optical link modules employing aspects of the invention are also disclosed.
    Type: Grant
    Filed: April 20, 1999
    Date of Patent: January 29, 2002
    Assignee: Fujitsu Limited
    Inventors: Tetsuzo Yoshimura, Yashuhito Takahashi, Masaaki Inao, Michael G. Lee, William Chou, Solomon I. Beilin, Wen-chou Vincent Wang, James J. Roman, Thomas J. Massingill