Patents by Inventor Hisamitsu Suzuki

Hisamitsu Suzuki 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).

  • Semiconductor random access memory device having digit lines selectively extending on inter-level insulating layers
    Patent number: 5477501
    Abstract: A semiconductor static random access memory device has a plurality of memory cells selectively connected to digit lines, and the digit lines are formed on different inter-level insulating layers in a partially overlapped manner so as to scale down the memory cells only.
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: December 19, 1995
    Assignee: NEC Corporation
    Inventor: Hisamitsu Suzuki
  • Method of producing a double-polysilicon bipolar transistor
    Patent number: 5403757
    Abstract: A double-layered structure of the base electrode corresponding to the emitter diffused-region 15 to be formed, which consists of the first and second conducting films 5, 6. This structure effects to prevent the surface of the silicon substrate in the emitter diffused-region to be formed from being etched away by the overetching for forming the base electrode, with much reduction of leakage current due to the consequent damage to the silicon-substrate surface in the emitter diffused-region to be formed, leading to improvement in transistor yield.
    Type: Grant
    Filed: August 30, 1993
    Date of Patent: April 4, 1995
    Assignee: NEC Corporation
    Inventor: Hisamitsu Suzuki
  • Acrylic resin for optical elements
    Patent number: 5093444
    Abstract: Acrylic resin for an optical element prepared through suspension polymerization in which reactants include; a 100 parts by weight of a mixture of methyl methacrylate and either one of ethyl acrylate and methyl acrylate; and sodium sulfate or sodium phosphate of 0.15 through 0.25 parts by weight.
    Type: Grant
    Filed: December 1, 1989
    Date of Patent: March 3, 1992
    Assignees: Pioneer Electronic Corporation, Pioneer Video Corporation
    Inventors: Hiroyuki Uchida, Kazuaki Namiki, Hisamitsu Suzuki