Patents by Inventor Toshiaki Douzaka

Toshiaki Douzaka 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: 9502080
    Abstract: According to one embodiment, a semiconductor memory device includes a memory cell array in which memory cells are disposed in a matrix, each memory cell being connectable to any one of a plurality of bit lines, and a capacitance that suppresses coupling noise among the plurality of bit lines, the capacitance being added to at least one of the plurality of bit lines.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: November 22, 2016
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Toshiaki Douzaka
  • Publication number: 20160036439
    Abstract: According to one embodiment, a semiconductor integrated circuit device includes a first line to which a voltage is applied; a first circuit operating based on a data; a second circuit capable of retaining the data; a third circuit between the first line and the first circuit and capable of shutting off a supply of the voltage to the first circuit; and a fourth circuit including a resistor element, the resistor element connected between the first line and the second circuit. The fourth circuit supplies the voltage to the second circuit via the resistor element in a period in which the third circuit shut off the supply of the voltage to the first circuit.
    Type: Application
    Filed: March 10, 2015
    Publication date: February 4, 2016
    Inventor: Toshiaki Douzaka
  • Publication number: 20150262627
    Abstract: According to one embodiment, a semiconductor memory device includes a memory cell array in which memory cells are disposed in a matrix, each memory cell being connectable to any one of a plurality of bit lines, and a capacitance that suppresses coupling noise among the plurality of bit lines, the capacitance being added to at least one of the plurality of bit lines.
    Type: Application
    Filed: August 29, 2014
    Publication date: September 17, 2015
    Inventor: Toshiaki DOUZAKA
  • Patent number: 8630135
    Abstract: A row decoder is disposed on a side of a memory cell array in a column direction and supplies one of word lines with a first drive signal for selecting one of memory cells. A dummy word line is formed extending in the column direction. A dummy bit line is formed extending in a row direction. At least one of the dummy word line and the dummy bit line is disposed outside of the memory cell array. The row decoder outputs a second drive signal toward a sense amplifier circuit via the dummy bit line and the dummy word line.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: January 14, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Toshiaki Douzaka
  • Publication number: 20120147687
    Abstract: A row decoder is disposed on a side of a memory cell array in a column direction and supplies one of word lines with a first drive signal for selecting one of memory cells. A dummy word line is formed extending in the column direction. A dummy bit line is formed extending in a row direction. At least one of the dummy word line and the dummy bit line is disposed outside of the memory cell array. The row decoder outputs a second drive signal toward a sense amplifier circuit via the dummy bit line and the dummy word line.
    Type: Application
    Filed: June 30, 2011
    Publication date: June 14, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Toshiaki Douzaka
  • Publication number: 20120069684
    Abstract: According to one embodiment, a semiconductor integrated circuit includes a memory cell array includes data storage units which are arranged at intersections of word lines and bit lines and hold data, a reversing circuit which logically reverses held data stored in the data storage units, and a flag bit column which stores, for each row, a flag for identifying presence/absence of logic reversal of data stored in the data storage units.
    Type: Application
    Filed: March 22, 2011
    Publication date: March 22, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Toshiaki Douzaka, Toshiyuki Kouchi, Atsushi Nakayama
  • Patent number: 7867671
    Abstract: A photo-mask that includes a first light shielding region which is narrow and elongated, and a second light shielding region which is wider and more elongated than the first light shielding region and is away from the first light shielding region. A phase shifter part and a non-phase shifter part are provided adjacently to both sides of the first light shielding region. Two phase shifter parts or two non-phase shifter parts are respectively provided adjacently to both sides of the second light shielding part.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: January 11, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshiaki Douzaka, Kyosuke Ogawa, Kaoru Hama, Hiroaki Suzuki
  • Patent number: 7495310
    Abstract: A fuse-data reading circuit is provided in a semiconductor integrated circuit device. In the fused-data reading circuit, a differential latch circuit compares a current depending on the resistance across a first fuse element, i.e., target element, with a current depending on the resistance of a series circuit including a second fuse element used as a reference fuse element and a resistor element. The differential latch circuit determines whether the first fuse element has been cut or not.
    Type: Grant
    Filed: May 25, 2005
    Date of Patent: February 24, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshiaki Douzaka, Shigeyuki Hayakawa, Yutaka Tanaka, Tsuyoshi Midorikawa
  • Publication number: 20080107974
    Abstract: A photo-mask, a multiphase exposure method and a method of manufacturing a semiconductor device are disclosed. The photo-mask mask includes a first light shielding region which is narrow and elongated, and a second light shielding region which is wider and more elongated than the first light shielding region and is away from the first light shielding region. A phase shifter part and a non-phase shifter part are provided adjacently to both sides of the first light shielding region. Two phase shifter parts or two non-phase shifter parts are respectively provided adjacently to both sides of the second light shielding part.
    Type: Application
    Filed: September 27, 2007
    Publication date: May 8, 2008
    Inventors: Toshiaki DOUZAKA, Kyosuke OGAWA, Kaoru HAMA, Hiroaki SUZUKI
  • Publication number: 20050280495
    Abstract: A fuse-data reading circuit is provided in a semiconductor integrated circuit device. In the fused-data reading circuit, a differential latch circuit compares a current depending on the resistance across a first fuse element, i.e., target element, with a current depending on the resistance of a series circuit including a second fuse element used as a reference fuse element and a resistor element. The differential latch circuit determines whether the first fuse element has been cut or not.
    Type: Application
    Filed: May 25, 2005
    Publication date: December 22, 2005
    Inventors: Toshiaki Douzaka, Shigeyuki Hayakawa, Yutaka Tanaka, Tsuyoshi Midorikawa