Patents by Inventor Yukichi Ono

Yukichi Ono 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: 7626876
    Abstract: A test circuit is connected to a memory core integrated unit of SRAM. When the memory core integrated unit is to be tested, a test start signal is set to a high level so that one of a bit line and an inverted bit line is used for data write and the test circuit sets data to this selected bit line. The other bit line is used for data read, and the written data is set to this bit line in the normal operation. Whether each memory core is not defective is judged by EOR which confirms data set to the bit line and data set to the inverted bit line are mutually inverted each other. A test method is realized which can test a defect of each memory core of a semiconductor memory such as SRAM in a short time.
    Type: Grant
    Filed: October 22, 2008
    Date of Patent: December 1, 2009
    Assignee: Yamaha Corporation
    Inventor: Yukichi Ono
  • Publication number: 20090059699
    Abstract: A test circuit is connected to a memory core integrated unit of SRAM. When the memory core integrated unit is to be tested, a test start signal is set to a high level so that one of a bit line and an inverted bit line is used for data write and the test circuit sets data to this selected bit line. The other bit line is used for data read, and the written data is set to this bit line in the normal operation. Whether each memory core is not defective is judged by EOR which confirms data set to the bit line and data set to the inverted bit line are mutually inverted each other. A test method is realized which can test a defect of each memory core of a semiconductor memory such as SRAM in a short time.
    Type: Application
    Filed: October 22, 2008
    Publication date: March 5, 2009
    Applicant: Yamaha Corporation
    Inventor: Yukichi Ono
  • Patent number: 7450449
    Abstract: A test circuit is connected to a memory core integrated unit of SRAM. When the memory core integrated unit is to be tested, a test start signal is set to a high level so that one of a bit line and an inverted bit line is used for data write and the test circuit sets data to this selected bit line. The other bit line is used for data read, and the written data is set to this bit line in the normal operation. Whether each memory core is not defective is judged by EOR which confirms data set to the bit line and data set to the inverted bit line are mutually inverted each other. A test method is realized which can test a defect of each memory core of a semiconductor memory such as SRAM in a short time.
    Type: Grant
    Filed: September 26, 2006
    Date of Patent: November 11, 2008
    Assignee: Yamaha Corporation
    Inventor: Yukichi Ono
  • Patent number: 7228510
    Abstract: A semiconductor integrated circuit device has: a semiconductor substrate defining a plurality of rows, each row including areas for a sequence of cells; a plurality of active regions disposed in each of the rows constituting semiconductor elements of associated cells; and a wiring region of stripe shape elongated along a direction of row, defined on the semiconductor substrate outside of the active regions in each row, and including wirings belonging to the associated cells, each wiring region having height in a direction crossing the row direction, the wiring region having locally different height.
    Type: Grant
    Filed: September 29, 2004
    Date of Patent: June 5, 2007
    Assignee: Yamaha Corporation
    Inventor: Yukichi Ono
  • Publication number: 20070070739
    Abstract: A test circuit is connected to a memory core integrated unit of SRAM. When the memory core integrated unit is to be tested, a test start signal is set to a high level so that one of a bit line and an inverted bit line is used for data write and the test circuit sets data to this selected bit line. The other bit line is used for data read, and the written data is set to this bit line in the normal operation. Whether each memory core is not defective is judged by EOR which confirms data set to the bit line and data set to the inverted bit line are mutually inverted each other. A test method is realized which can test a defect of each memory core of a semiconductor memory such as SRAM in a short time.
    Type: Application
    Filed: September 26, 2006
    Publication date: March 29, 2007
    Applicant: YAMAHA CORPORATION
    Inventor: Yukichi Ono
  • Patent number: 7053424
    Abstract: A semiconductor integrated circuit device has: a semiconductor substrate defining a plurality of rows, each row including areas for a sequence of cells; a plurality of active regions disposed in each of the rows constituting semiconductor elements of associated cells; and a wiring region of stripe shape elongated along a direction of row, defined on the semiconductor substrate outside of the active regions in each row, and including wirings belonging to the associated cells, each wiring region having height in a direction crossing the row direction, the wiring region having locally different height.
    Type: Grant
    Filed: October 30, 2003
    Date of Patent: May 30, 2006
    Assignee: Yamaha Corporation
    Inventor: Yukichi Ono
  • Publication number: 20050040435
    Abstract: A semiconductor integrated circuit device has: a semiconductor substrate defining a plurality of rows, each row including areas for a sequence of cells; a plurality of active regions disposed in each of the rows constituting semiconductor elements of associated cells; and a wiring region of stripe shape elongated along a direction of row, defined on the semiconductor substrate outside of the active regions in each row, and including wirings belonging to the associated cells, each wiring region having height in a direction crossing the row direction, the wiring region having locally different height.
    Type: Application
    Filed: September 29, 2004
    Publication date: February 24, 2005
    Inventor: Yukichi Ono
  • Publication number: 20040089881
    Abstract: A semiconductor integrated circuit device has: a semiconductor substrate defining a plurality of rows, each row including areas for a sequence of cells; a plurality of active regions disposed in each of the rows constituting semiconductor elements of associated cells; and a wiring region of stripe shape elongated along a direction of row, defined on the semiconductor substrate outside of the active regions in each row, and including wirings belonging to the associated cells, each wiring region having height in a direction crossing the row direction, the wiring region having locally different height.
    Type: Application
    Filed: October 30, 2003
    Publication date: May 13, 2004
    Applicant: Yamaha Corporation
    Inventor: Yukichi Ono
  • Patent number: 5606198
    Abstract: A semiconductor device comprising a semiconductor chip substrate, an integrated circuit formed on a surface of the semiconductor chip substrate, and metal electrodes extending from the integrated circuit to at least one of the side surfaces of the semiconductor chip substrate. Occupation area on a wiring circuit board can be reduced. Damaged chips can be exchanged easily. When it is set vertically, heat radiation efficiency can be improved.
    Type: Grant
    Filed: October 12, 1994
    Date of Patent: February 25, 1997
    Assignee: Yamaha Corporation
    Inventors: Yukichi Ono, Katsuhiko Ishida