Patents by Inventor Koichiro ZAITSU

Koichiro ZAITSU 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).

  • Publication number: 20140022840
    Abstract: According to one embodiment, a non-volatile programmable switch according to this embodiment includes first and second non-volatile memory transistors, and a common node that is connected to the output side terminals of the first and second non-volatile memory transistors, and a logic transistor unit that is connected to the common node. A length of a gate electrode of the first and second non-volatile memory transistors in a channel longitudinal direction is shorter than a length of the charge storage film in the channel longitudinal direction.
    Type: Application
    Filed: February 25, 2013
    Publication date: January 23, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Kosuke Tatsumura, Koichiro Zaitsu, Mari Matsumoto, Shinichi Yasuda
  • Patent number: 8629690
    Abstract: One embodiment provides a programmable logic device in which a logic switch includes: a first memory having a first terminal connected to a first wire, a second terminal connected to a second wire, and a third terminal connected to a third wire; a second memory having a fourth terminal connected to the first wire, a fifth terminal connected to a fourth wire, and a sixth terminal connected to a fifth wire; and a pass transistor having a gate connected to the first terminal, and a source and a drain respectively connected to a sixth wire and a seventh wire. A source or drain of a first select gate transistor is connected the sixth wire, and a source or drain of a second select gate transistor is connected to the seventh wire.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: January 14, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Mari Matsumoto, Kosuke Tatsumura, Koichiro Zaitsu
  • Publication number: 20130307054
    Abstract: One embodiment provides a semiconductor integrated circuit, including: a substrate; a plurality of nonvolatile memory portions formed in the substrate, each including a first nonvolatile memory and a second nonvolatile memory; and a plurality of logic transistor portions formed in the substrate, each including at least one of logic transistor, wherein the logic transistors include: a first transistor which is directly connected to drains of the first and second nonvolatile memories at its gate; and a second transistor which is not directly connected to the drains of the first and second nonvolatile memories, and wherein a bottom surface of the gate of each of the logic transistors sandwiching the first and second nonvolatile memories is lower in height from a top surface of the substrate than a bottom surface of the control gate of each of the first and second nonvolatile memories.
    Type: Application
    Filed: September 7, 2012
    Publication date: November 21, 2013
    Inventors: Shinichi YASUDA, Kosuke Tatsumura, Mari Matsumoto, Koichiro Zaitsu, Masato Oda, Atsuhiro Kinoshita, Daisuke Hagishima, Yoshifumi Nishi, Takahiro Kurita, Shinobu Fujita
  • Publication number: 20130258782
    Abstract: According to one embodiment, a configuration memory includes first and second data lines, a first memory string which comprises at least first and second nonvolatile memory transistors which are connected in series between a common node and the first data line, a second memory string which comprises at least third and fourth nonvolatile memory transistors which are connected in series between the common node and the second data line, and a flip-flop circuit which comprises a first data holding node connected to the common node and a second data holding node connected to a configuration data output node.
    Type: Application
    Filed: September 5, 2012
    Publication date: October 3, 2013
    Inventors: Kosuke TATSUMURA, Masato ODA, Koichiro ZAITSU, Atsushi KAWASUMI, Mari MATSUMOTO, Shinichi YASUDA
  • Publication number: 20130248959
    Abstract: According to one embodiment, a programmable logic switch includes first and second word lines above a first path transistor, a first pillar passing through the first and second word lines and connected to the first path transistor, a second pillar passing through the first and second word lines and connected to the first path transistor, a first memory device between the first pillar and the first word line, a second memory device between the first pillar and the second word line, a third memory device between the second pillar and the first word line, and a fourth memory device between the second pillar and the second word line.
    Type: Application
    Filed: February 21, 2013
    Publication date: September 26, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Mari MATSUMOTO, Shinichi YASUDA, Masato ODA, Kosuke TATSUMURA, Koichiro ZAITSU, Shuou NOMURA, Yoshihisa IWATA
  • Publication number: 20130241596
    Abstract: One embodiment provides a programmable logic device in which a logic switch includes: a first memory having a first terminal connected to a first wire, a second terminal connected to a second wire, and a third terminal connected to a third wire; a second memory having a fourth terminal connected to the first wire, a fifth terminal connected to a fourth wire, and a sixth terminal connected to a fifth wire; and a pass transistor having a gate connected to the first terminal, and a source and a drain respectively connected to a sixth wire and a seventh wire. A source or drain of a first select gate transistor is connected the sixth wire, and a source or drain of a second select gate transistor is connected to the seventh wire.
    Type: Application
    Filed: September 6, 2012
    Publication date: September 19, 2013
    Inventors: Mari MATSUMOTO, Kosuke Tatsumura, Koichiro Zaitsu
  • Publication number: 20130215670
    Abstract: A memory circuit according to an embodiment includes: a plurality of memory cells each having one pair of first and second nonvolatile memory circuits, each of the first and second nonvolatile memory circuits in each memory cell being capable of making a transition between a high resistance state and a low resistance state, and in a state in which one memory cell in the plurality of memory cells has information stored therein, one of the first and second nonvolatile memory circuits in the one memory cell being in a high resistance state whereas the other being in a low resistance state.
    Type: Application
    Filed: December 19, 2012
    Publication date: August 22, 2013
    Inventors: Masato ODA, Koichiro ZAITSU, Kiwamu SAKUMA, Shinichi YASUDA, Kohei OIKAWA
  • Publication number: 20130134499
    Abstract: A nonvolatile programmable switch according to an embodiment includes: a first nonvolatile memory transistor including a first to third terminals connected to a first to third interconnects respectively; a second nonvolatile memory transistor including a fourth terminal connected to a fourth interconnect, a fifth terminal connected to the second interconnect, and a sixth terminal connected to the third interconnect, the first and second nonvolatile memory transistors having the same conductivity type; and a pass transistor having a gate electrode connected to the second interconnect. When the first and fourth interconnects are connected to a first power supply while the third interconnect is connected to a second power supply having a higher voltage than that of the first power supply, a threshold voltage of the first nonvolatile memory transistor increases, and a threshold voltage of the second nonvolatile memory transistor decreases.
    Type: Application
    Filed: May 11, 2012
    Publication date: May 30, 2013
    Inventors: Kosuke TATSUMURA, Kiwamu Sakuma, Koichiro Zaitsu, Mari Matsumoto
  • Patent number: 8432186
    Abstract: One embodiment provides a programmable logic switch in which a first nonvolatile memory and a second nonvolatile memory are formed in the same well, and in which to change the first nonvolatile memory from an erased state to a written state and leave the second nonvolatile memory being in the erased state, a first write voltage is applied to a first line connected with gate electrodes of the first and second nonvolatile memories, a second write voltage is applied to a second line connected to a source in the first nonvolatile memory, and a third write voltage lower than the second write voltage is applied to a fourth line connected to a source of the second nonvolatile memory.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: April 30, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Koichiro Zaitsu, Kosuke Tatsumura, Mari Matsumoto, Shinichi Yasuda, Masato Oda, Haruka Kusai, Kiwamu Sakuma
  • Publication number: 20130076392
    Abstract: A nonvolatile programmable logic switch according to an embodiment includes first and second cells, each of the first and second cells including: a first memory having a first to third terminals, the third terminal being receiving a control signal; a first transistor connected at one of source/drain to the second terminal; and a second transistor connected at a gate to the other of the source/drain of the first transistor, the third terminal of the first memory in the first cell and the third terminal of the first memory in the second cell being connected in common. When conducting writing into the first memory in the first cell, the third terminal is connected to a write power supply generating a write voltage, the first terminals in the first and second cells are connected to a ground power supply and a write inhibit power supply generating a write inhibit voltage respectively.
    Type: Application
    Filed: September 7, 2012
    Publication date: March 28, 2013
    Inventors: Koichiro ZAITSU, Kosuke Tatsumura, Mari Matsumoto
  • Publication number: 20120080737
    Abstract: According to one embodiment, a semiconductor device is provided. The semiconductor is provided with a MEMS switch element having a control terminal and a pair of signal terminals, and a non-volatile memory unit having first and second non-volatile semiconductor elements. The first non-volatile semiconductor element has a first source, a first drain and a first control gate terminal. The first drain is electrically connected to the control terminal of the MEMS switch element. The second non-volatile semiconductor element has a second source, a second drain and a second control gate terminal. The second drain gate terminal is electrically connected to the control terminal of the MEMS switch element.
    Type: Application
    Filed: March 18, 2011
    Publication date: April 5, 2012
    Inventors: Koichiro ZAITSU, Shinichi Yasuda, Shinobu Fujita