Patents by Inventor Hiroshi Akamatsu

Hiroshi Akamatsu 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: 10074443
    Abstract: Disclosed here is a semiconductor device that comprises plurality of input nodes configured to be supplied with input signals, a decoder coupled to the input nodes, the decoder configured to decode the input signals and output decoded sepals, and a plurality of fuse circuits provided correspondingly with the decoded signals and configured to be programmed responsive to the decoded signals, respectively
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: September 11, 2018
    Assignee: Micron Technology, Inc.
    Inventor: Hiroshi Akamatsu
  • Publication number: 20180158504
    Abstract: An apparatus includes a first word line, a second word line and a control. The second word line is contiguous to the first word line. The control circuit includes a first defective address storing circuit and a first detection circuit. The first defective address storing circuit stores first enable information along with first defective address. The first enable information indicates whether or not the second word line is functional. The first detection circuit provides a first signal when the first word line is accessed. The first signal indicates whether or not the second word line is functional. The control circuit activates the second word line when the first signal indicates that the second word line is functional and does not activate the second word line when the first signal indicates that the second word line is not functional.
    Type: Application
    Filed: February 5, 2018
    Publication date: June 7, 2018
    Applicant: Micron Technology, Inc.
    Inventor: Hiroshi Akamatsu
  • Patent number: 9922694
    Abstract: An apparatus includes a first word line, a second word line and a control. The second word line is contiguous to the first word line. The control circuit includes a first defective address storing circuit and a first detection circuit. The first defective address storing circuit stores first enable information along with first defective address. The first enable information indicates whether or not the second word line is functional. The first detection circuit provides a first signal when the first word line is accessed. The first signal indicates whether or not the second word line is functional. The control circuit activates the second word line when the first signal indicates that the second word line is functional and does not activate the second word line when the first signal indicates that the second word line is not functional.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: March 20, 2018
    Assignee: Micron Technology, Inc.
    Inventor: Hiroshi Akamatsu
  • Publication number: 20180075922
    Abstract: Disclosed here is a semiconductor device that comprises plurality of input nodes configured to be supplied with input signals, a decoder coupled to the input nodes, the decoder configured to decode the input signals and output decoded sepals, and a plurality of fuse circuits provided correspondingly with the decoded signals and configured to be programmed responsive to the decoded signals, respectively
    Type: Application
    Filed: November 17, 2017
    Publication date: March 15, 2018
    Applicant: MICRON TECHNOLOGY, INC.
    Inventor: HIROSHI AKAMATSU
  • Publication number: 20180019047
    Abstract: A magnetic component unit in the present disclosure includes: a coil component; a heat dissipator which has an engagement fixing portion and a press fixing portion; and a magnetic core fixing portion. The magnetic core fixing portion includes: a holding portion that presses against the coil component; an engaging portion that extends from a first end part of the holding portion toward the heat dissipator and has a turned-back end part; and a pressing portion that extends from a second end part of the holding portion toward the heat dissipator and has an end part bent into an L-shape. The engagement fixing portion has a U-shape, and one end and the other end of the engagement fixing portion are connected to a peripheral edge portion of the heat dissipator. The press fixing portion has a columnar shape and is provided vertically protruding from the heat dissipator.
    Type: Application
    Filed: January 8, 2016
    Publication date: January 18, 2018
    Inventors: Mitsuhiro MATSUO, Hiroshi AKAMATSU
  • Patent number: 9865359
    Abstract: Disclosed here is a semiconductor device that comprises a plurality of input nodes configured to be supplied with input signals, a decoder coupled to the input nodes, the decoder configured to decode the input signals and output decoded signals, and a plurality of fuse circuits provided correspondingly with the decoded signals and configured to be programmed responsive to the decoded signals, respectively.
    Type: Grant
    Filed: July 17, 2017
    Date of Patent: January 9, 2018
    Assignee: Micron Technology, Inc.
    Inventor: Hiroshi Akamatsu
  • Publication number: 20170316836
    Abstract: Disclosed here is a semiconductor device that comprises a plurality of input nodes configured to be supplied with input signals, a decoder coupled to the input nodes, the decoder configured to decode the input signals and output decoded signals, and a plurality of fuse circuits provided correspondingly with the decoded signals and configured to be programmed responsive to the decoded signals, respectively.
    Type: Application
    Filed: July 17, 2017
    Publication date: November 2, 2017
    Applicant: MICRON TECHNOLOGY, INC.
    Inventor: HIROSHI AKAMATSU
  • Patent number: 9741447
    Abstract: Disclosed here is a semiconductor device that comprises a plurality of input nodes configured to be supplied with input signals, a decoder coupled to the input nodes, the decoder configured to decode the input signals and output decoded signals, and a plurality of fuse circuits provided correspondingly with the decoded signals and configured to be programmed responsive to the decoded signals, respectively.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: August 22, 2017
    Assignee: Micron Technology, Inc.
    Inventor: Hiroshi Akamatsu
  • Publication number: 20150340077
    Abstract: An apparatus includes a first word line, a second word line and a control. The second word line is contiguous to the first word line. The control circuit includes a first defective address storing circuit and a first detection circuit. The first defective address storing circuit stores first enable information along with first defective address. The first enable information indicates whether or not the second word line is functional. The first detection circuit provides a first signal when the first word line is accessed. The first signal indicates whether or not the second word line is functional. The control circuit activates the second word line when the first signal indicates that the second word line is functional and does not activate the second word line when the first signal indicates that the second word line is not functional.
    Type: Application
    Filed: May 15, 2015
    Publication date: November 26, 2015
    Inventor: HIROSHI AKAMATSU
  • Publication number: 20150310926
    Abstract: Disclosed here is a semiconductor device that comprises a plurality of input nodes configured to be supplied with input signals, a decoder coupled to the input nodes, the decoder configured to decode the input signals and output decoded signals, and a plurality of fuse circuits provided correspondingly with the decoded signals and configured to be programmed responsive to the decoded signals, respectively.
    Type: Application
    Filed: April 9, 2015
    Publication date: October 29, 2015
    Inventor: HIROSHI AKAMATSU
  • Publication number: 20140233334
    Abstract: A device includes a command decoder that is configured to output, in a normal operation mode, a precharge signal in response to a first type transition edge of a synchronous signal, and an active signal in response to a next first type transition edge that is next to the first type transition edge. The command decoder is configured to output, in a test mode, the precharge signal in response to a second type transition edge of the synchronous signal, and the active signal in response to a next first type transition edge that is next to the second type transition edge.
    Type: Application
    Filed: April 28, 2014
    Publication date: August 21, 2014
    Applicant: Elpida Memory, Inc.
    Inventors: Kinu MATSUNAGA, Hiroshi AKAMATSU
  • Publication number: 20140226423
    Abstract: Provided is a device, including: a first terminal which receives an external clock signal; a clock generation circuit connected to the first terminal to generate an internal clock signal based on the external clock signal; word lines and bit lines; amplifier circuits connected to the bit lines, respectively; and a control unit. The control unit controls, in a test operation, at least one of the word lines to repeat a selected state and an unselected state in accordance with the internal clock signal during a first period, and maintains the amplifier circuits in an active state during the first period. The control unit further controls, in a normal operation, the amplifier circuits to switch between the active state and an inactive state depending on switching between the selected state and the unselected state of the at least one of the word lines.
    Type: Application
    Filed: April 18, 2014
    Publication date: August 14, 2014
    Applicant: Elpida Memory, Inc.
    Inventors: Hiroshi AKAMATSU, Shoji Kaneko
  • Patent number: 8737158
    Abstract: A device includes a command decoder that is configured to output, in a normal operation mode, a precharge signal in response to a first type transition edge of a synchronous signal, and an active signal in response to a next first type transition edge that is next to the first type transition edge. The command decoder is configured to output, in a test mode, the precharge signal in response to a second type transition edge of the synchronous signal, and the active signal in response to a next first type transition edge that is next to the second type transition edge.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: May 27, 2014
    Inventors: Kinu Matsunaga, Hiroshi Akamatsu
  • Patent number: 8730742
    Abstract: Provided is a device, including: a first terminal which receives an external clock signal; a clock generation circuit connected to the first terminal to generate an internal clock signal based on the external clock signal; word lines and bit lines; amplifier circuits connected to the bit lines, respectively; and a control unit. The control unit controls, in a test operation, at least one of the word lines to repeat a selected state and an unselected state in accordance with the internal clock signal during a first period, and maintains the amplifier circuits in an active state during the first period. The control unit further controls, in a normal operation, the amplifier circuits to switch between the active state and an inactive state depending on switching between the selected state and the unselected state of the at least one of the word lines.
    Type: Grant
    Filed: April 10, 2012
    Date of Patent: May 20, 2014
    Inventors: Hiroshi Akamatsu, Shoji Kaneko
  • Publication number: 20120262996
    Abstract: Provided is a device, including: a first terminal which receives an external clock signal; a clock generation circuit connected to the first terminal to generate an internal clock signal based on the external clock signal; word lines and bit lines; amplifier circuits connected to the bit lines, respectively; and a control unit. The control unit controls, in a test operation, at least one of the word lines to repeat a selected state and an unselected state in accordance with the internal clock signal during a first period, and maintains the amplifier circuits in an active state during the first period. The control unit further controls, in a normal operation, the amplifier circuits to switch between the active state and an inactive state depending on switching between the selected state and the unselected state of the at least one of the word lines.
    Type: Application
    Filed: April 10, 2012
    Publication date: October 18, 2012
    Applicant: Elpida Memory, Inc.
    Inventors: Hiroshi AKAMATSU, Shoji KANEKO
  • Publication number: 20120250435
    Abstract: A device includes a command decoder that is configured to output, in a normal operation mode, a precharge signal in response to a first type transition edge of a synchronous signal, and an active signal in response to a next first type transition edge that is next to the first type transition edge. The command decoder is configured to output, in a test mode, the precharge signal in response to a second type transition edge of the synchronous signal, and the active signal in response to a next first type transition edge that is next to the second type transition edge.
    Type: Application
    Filed: March 27, 2012
    Publication date: October 4, 2012
    Applicant: ELPIDA MEMORY, INC.
    Inventors: Kinu MATSUNAGA, Hiroshi AKAMATSU
  • Patent number: 7973298
    Abstract: A transport/storage cask for a radioactive material has an inner shell, an outer shell and a circular gamma ray shielding layer and a circular neutron shielding layer both of which are placed between the inner shell and the outer shell. The gamma ray shielding layer is formed by aligning a plurality of gamma ray shielding blocks composed of lead in a block shape in the circumferential direction. The entire gamma ray shielding block in the axial direction is covered with a copper tube having a higher elasticity limit than the gamma ray shielding block. In the above transport/storage cask, the gamma ray shielding layer composed of lead or a lead alloy is not easily deformed.
    Type: Grant
    Filed: August 4, 2008
    Date of Patent: July 5, 2011
    Assignee: Kobe Steel, Ltd.
    Inventors: Jun Shimojo, Hiroshi Akamatsu, Hiroaki Taniuchi, Kenichi Mantani
  • Publication number: 20110133808
    Abstract: An apparatus has a delay circuit, a delay control circuit which detects the delay time of the delay circuit and generates a delay adjustment signal based upon the detection result, and a delay adjustment circuit operable to adjust delay time of the delay circuit in response to the delay adjustment signal.
    Type: Application
    Filed: December 8, 2010
    Publication date: June 9, 2011
    Applicant: ELPIDA MEMORY, INC.
    Inventor: Hiroshi AKAMATSU
  • Patent number: 7791402
    Abstract: An electrical fuse determination circuit that can speedily and reliably incorporate an electrical fuse data and improve a reliability of electrical fuse device, includes a first electrical fuse device of which one end connects with a higher voltage, a second electrical fuse device of which one end connects with a lower voltage, a set portion that puts one of the first electrical fuse device and the second electrical fuse device in a conductive state, and a determination portion that determines a voltage level of a predetermined contact point connecting the other end of the first electrical fuse device and the other end of the second electrical fuse device.
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: September 7, 2010
    Assignee: Elpida Memory, Inc.
    Inventor: Hiroshi Akamatsu
  • Publication number: 20100195416
    Abstract: An anti-fuse circuit uses first to fifth power supplies which have first to fifth power supply voltages, respectively, in the order of highest to lowest during writing. The anti-fuse circuit includes: a first level shift circuit which is connected to the second to fourth power supplies and which converts a first logic signal that changes between the third and fourth power supply voltages into a second logic signal that changes between the second and fourth power supply voltages; a second level shift circuit which is connected to the first, second, and fourth power supplies and which converts the second logic signal into a third logic signal that changes between the first and fourth power supply voltages; a transistor having a source connected to the first power supply and a gate connected to the third logic signal; and an anti-fuse element having one end connected to the drain of the transistor and the other end connected to the fifth power supply.
    Type: Application
    Filed: February 1, 2010
    Publication date: August 5, 2010
    Applicant: Elpida Memory, Inc.
    Inventor: Hiroshi Akamatsu