Patents by Inventor Mutsunori Igarashi

Mutsunori Igarashi 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: 7539952
    Abstract: A reticle set includes a first reticle including a first wiring pattern having a first termination pattern; a second reticle including a plurality of via patterns; and a third reticle including a second wiring pattern having a second termination pattern and a second line pattern connected to an end of the second termination pattern.
    Type: Grant
    Filed: September 14, 2006
    Date of Patent: May 26, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Atsushi Watanabe, Mutsunori Igarashi
  • Patent number: 7230554
    Abstract: The present invention provides an noise suppression circuit comprises an internal circuit which has a high and a low level terminals. The low level terminal is connected to a low level power supply (GND) line. The noise suppression circuit further comprises a first transistor in which one main electrode is connected to the high level terminal of the circuit, a bypass capacitor connected between the other main electrode of the first transistor and the low level power supply line, and a second transistor connected between the other main electrode of the first transistor and a high level power supply (VDD) line. The first transistor is conductive when the internal circuit is active, and is not conductive when the internal circuit is inactive. The second transistor is not conductive when the internal circuit is active, and is conductive when the internal circuit is inactive.
    Type: Grant
    Filed: April 26, 2006
    Date of Patent: June 12, 2007
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hideki Takeuchi, Masami Murakata, Masaaki Yamada, Reiko Nojima, Takashi Ishioka, Mutsunori Igarashi
  • Publication number: 20070011638
    Abstract: A reticle set includes a first reticle including a first wiring pattern having a first termination pattern; a second reticle including a plurality of via patterns; and a third reticle including a second wiring pattern having a second termination pattern and a second line pattern connected to an end of the second termination pattern.
    Type: Application
    Filed: September 14, 2006
    Publication date: January 11, 2007
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Atsushi Watanabe, Mutsunori Igarashi
  • Patent number: 7127694
    Abstract: A reticle set includes a first reticle including a first wiring pattern having a first termination pattern; a second reticle including a plurality of via patterns; and a third reticle including a second wiring pattern having a second termination pattern and a second line pattern connected to an end of the second termination pattern.
    Type: Grant
    Filed: May 10, 2004
    Date of Patent: October 24, 2006
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Atsushi Watanabe, Mutsunori Igarashi
  • Patent number: 7124389
    Abstract: An automated wiring pattern layout method is provided. With this method, a first wiring pattern is generated with width W and extending in a first direction, and a second wiring pattern is generated with width W and extending in a direction perpendicular to the first wiring pattern in a manner such that the end thereof ends at the end portion of the first wiring pattern. Moreover, an overlapping region is generated by bending an end of either one of the first or the second wiring pattern at a right angle to produce an L-shaped extension and overlaying the first and the second wiring pattern, and a rectangular-shaped VIA pattern is generated at the overlapping region.
    Type: Grant
    Filed: May 17, 2004
    Date of Patent: October 17, 2006
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Mutsunori Igarashi, Masaaki Yamada, Koji Hashimoto, Makoto Takashima, Atsuhiko Ikeuchi
  • Publication number: 20060197695
    Abstract: The present invention provides an noise suppression circuit comprises an internal circuit which has a high and a low level terminals. The low level terminal is connected to a low level power supply (GND) line. The noise suppression circuit further comprises a first transistor in which one main electrode is connected to the high level terminal of the circuit, a bypass capacitor connected between the other main electrode of the first transistor and the low level power supply line, and a second transistor connected between the other main electrode of the first transistor and a high level power supply (VDD) line. The first transistor is conductive when the internal circuit is active, and is not conductive when the internal circuit is inactive. The second transistor is not conductive when the internal circuit is active, and is conductive when the internal circuit is inactive.
    Type: Application
    Filed: April 26, 2006
    Publication date: September 7, 2006
    Inventors: Hideki Takeuchi, Masami Murakata, Masaaki Yamada, Reiko Nojima, Takashi Ishioka, Mutsunori Igarashi
  • Patent number: 7064691
    Abstract: A noise suppression circuit encompasses an internal circuit, a bypass capacitor, first and second transistors. The internal circuit has high and low level terminals, and the low level terminal is connected to a low level power supply line. The internal circuit is supplied with enable and inverted enable signals. The first transistor has a first control electrode, and one main electrode is connected to the high level terminal. The first control electrode is supplied with the inverted enable signal. The bypass capacitor is connected between the other main electrode of the first transistor and the low level power supply line. The second transistor is connected between the other main electrode of the first transistor and a high level power supply line. The second transistor has a second control electrode supplied with the enable signal. The second transistor is not conductive when the internal circuit is active.
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: June 20, 2006
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hideki Takeuchi, Masami Murakata, Masaaki Yamada, Reiko Nojima, Takashi Ishioka, Mutsunori Igarashi
  • Patent number: 7013444
    Abstract: A layout design system of a semiconductor integrated circuit, comprising: a library information storage unit configured to register a basic via shape list; a technology database storage unit configured to register a list expressing an optimum wire terminating process for each via shape of said basic via shape list registered in said library information storage unit; and a central processing control unit configured to refer to the lists respectively registered in said library information storage unit and said technology database storage unit, select an optimum line processing, and execute a line design.
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: March 14, 2006
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Mutsunori Igarashi, Takashi Mitsuhashi
  • Publication number: 20050166176
    Abstract: A reticle set includes a first reticle including a first wiring pattern having a first termination pattern; a second reticle including a plurality of via patterns; and a third reticle including a second wiring pattern having a second termination pattern and a second line pattern connected to an end of the second termination pattern.
    Type: Application
    Filed: May 10, 2004
    Publication date: July 28, 2005
    Inventors: Atsushi Watanabe, Mutsunori Igarashi
  • Patent number: 6904572
    Abstract: A computer-implemented method for designing a semiconductor integrated circuit, which optimizes the propagation delay of a path from a signal input terminal (source) to a signal output terminal (sink) on the same net, includes: calculating the ratio of the total sum of a gate input load capacitance to the wiring capacitance of the path from the source to the sink as a process variation sensitivity relating to the capacitance component of the path to be designed from the source to the sink, based on a circuit design information of a gate level of the semiconductor integrated circuit to be designed; and optimizing the process variation sensitivity relating to the capacitance component of each path in order that the process variation sensitivities relating to the capacitance components of all the paths are smaller than a reference value.
    Type: Grant
    Filed: March 3, 2003
    Date of Patent: June 7, 2005
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Mutsunori Igarashi
  • Publication number: 20040237060
    Abstract: A clock layout method comprises accepting circuit information on a logic circuit, placing a route driver on a semiconductor chip and forming initial clock routing with an H-tree structure in a local area and with a star structure in a global area, specifying a second node which first appears on a first wire among a plurality of wires branching from an arbitrary first node in the initial clock routing, specifying at least a third node which is the second to appear on a wire other than the first wire among the plurality of wires branching from the first node, defining the defined third node which exists in a direction within a predetermined angle from an input direction of a signal inputted to the second node, among the third nodes, folding a wire from the first node up to the defined third node and a node present therebetween.
    Type: Application
    Filed: March 18, 2004
    Publication date: November 25, 2004
    Inventors: Mutsunori Igarashi, Fumihiro Minami
  • Patent number: 6813756
    Abstract: With an automatic layout method, a first line having a first line width is generated in a prescribed direction. A second line having a second line width and extending at an oblique angle with respect to the first line is generated, so that the second line terminates at an end portion of the first line with an overlapped area. One or more VIA patterns are read out of a database according to the shape of the overlapped area. The VIA patterns are placed in the overlapped area, so that one of the VIA patterns is located at the intersection of the center lines of the first and second lines. The VIA pattern is a combination of parallelograms, including squares and rectangles.
    Type: Grant
    Filed: October 24, 2002
    Date of Patent: November 2, 2004
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Mutsunori Igarashi, Masami Murakata, Takashi Mitsuhashi, Masaaki Yamada, Fumihiro Minami, Takashi Ishioka
  • Publication number: 20040210862
    Abstract: An automated wiring pattern layout method is provided. With this method, a first wiring pattern is generated with width W and extending in a first direction, and a second wiring pattern is generated with width W and extending in a direction perpendicular to the first wiring pattern in a manner such that the end thereof ends at the end portion of the first wiring pattern. Moreover, an overlapping region is generated by bending an end of either one of the first or the second wiring pattern at a right angle to produce an L-shaped extension and overlaying the first and the second wiring pattern, and a rectangular-shaped VIA pattern is generated at the overlapping region.
    Type: Application
    Filed: May 17, 2004
    Publication date: October 21, 2004
    Inventors: Mutsunori Igarashi, Masaaki Yamada, Koji Hashimoto, Makoto Takashima, Atsuhiko Ikeuchi
  • Publication number: 20040199892
    Abstract: A layout design system of a semiconductor integrated circuit, comprising: a library information storage unit configured to register a basic via shape list; a technology database storage unit configured to register a list expressing an optimum wire terminating process for each via shape of said basic via shape list registered in said library information storage unit; and a central processing control unit configured to refer to the lists respectively registered in said library information storage unit and said technology database storage unit, select an optimum line processing, and execute a line design.
    Type: Application
    Filed: April 14, 2004
    Publication date: October 7, 2004
    Inventors: Mutsunori Igarashi, Takashi Mitsuhashi
  • Patent number: 6792593
    Abstract: In a pattern correction method, design layout data of a pattern designed by an automated layout unit is entered. An environmental profile is determined based on whether or not another graphics pattern exists at the surroundings of each correction target cell included in the entered design layout data. A target cell name is replaced with a prescribed cell name of correction pattern corresponding to the determined environmental profile by referencing a cell replacement table. An OPC correction pattern corresponding to the replaced cell name is imported from a cell library.
    Type: Grant
    Filed: April 25, 2002
    Date of Patent: September 14, 2004
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Makoto Takashima, Atsuhiko Ikeuchi, Koji Hashimoto, Mutsunori Igarashi, Masaaki Yamada
  • Patent number: 6779167
    Abstract: An automated wiring pattern layout method is provided. With this method, a first wiring pattern is generated with width W and extending in a first direction, and a second wiring pattern is generated with width W and extending in a direction perpendicular to the first wiring pattern in a manner such that the end thereof ends at the end portion of the first wiring pattern. Moreover, an overlapping region is generated by bending an end of either one of the first or the second wiring pattern at a right angle to produce an L-shaped extension and overlaying the first and the second wiring pattern, and a rectangular-shaped VIA pattern is generated at the overlapping region.
    Type: Grant
    Filed: April 26, 2002
    Date of Patent: August 17, 2004
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Mutsunori Igarashi, Masaaki Yamada, Koji Hashimoto, Makoto Takashima, Atsuhiko Ikeuchi
  • Patent number: 6763508
    Abstract: A layout design system of a semiconductor integrated circuit, comprising: a library information storage unit configured to register a basic via shape list; a technology database storage unit configured to register a list expressing an optimum wire terminating process for each via shape of said basic via shape list registered in said library information storage unit; and a central processing control unit configured to refer to the lists respectively registered in said library information storage unit and said technology database storage unit, select an optimum line processing, and execute a line design.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: July 13, 2004
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Mutsunori Igarashi, Takashi Mitsuhashi
  • Patent number: 6683336
    Abstract: A semiconductor integrated circuit, a supply method of supplying multiple supply voltages therefor, and a record medium for storing a program of the supply method for supplying multiple voltages therefor in which a first cell to which multiple supply voltages are supplied is extracted (Step S1), the extracted cells are divided into groups (Step S2), cells for voltage supply are added and arranged according to the number of the groups (Step S3), and the cell for the voltage supply are connected to the first cell for supplying the plurality of voltages through a net for a power source supply (Step S4).
    Type: Grant
    Filed: July 3, 2000
    Date of Patent: January 27, 2004
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Mutsunori Igarashi, Hiroshi Tanaka, Kimiyoshi Usami, Takashi Ishikawa, Masahiro Kanazawa, Chiharu Mizuno
  • Patent number: 6645842
    Abstract: There are disclosed a semiconductor integrated circuit device, a semiconductor integrated circuit wiring method and a cell arranging method, which can reduce delay in a semiconductor integrated circuit and improve noise resistibility, achieve facility of wiring design, and reduce production cost.
    Type: Grant
    Filed: July 18, 2002
    Date of Patent: November 11, 2003
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Mutsunori Igarashi, Takashi Mitsuhashi, Masami Murakata, Masaaki Yamada, Fumihiro Minami, Toshihiro Akiyama, Takahiro Aoki
  • Publication number: 20030167451
    Abstract: A computer-implemented method for designing a semiconductor integrated circuit, which optimizes the propagation delay of a path from a signal input terminal (source) to a signal output terminal (sink) on the same net, includes: calculating the ratio of the total sum of a gate input load capacitance to the wiring capacitance of the path from the source to the sink as a process variation sensitivity relating to the capacitance component of the path to be designed from the source to the sink, based on a circuit design information of a gate level of the semiconductor integrated circuit to be designed; and optimizing the process variation sensitivity relating to the capacitance component of each path in order that the process variation sensitivities relating to the capacitance components of all the paths are smaller than a reference value.
    Type: Application
    Filed: March 3, 2003
    Publication date: September 4, 2003
    Inventor: Mutsunori Igarashi