Patents by Inventor Takayuki Takashina
Takayuki Takashina 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).
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Patent number: 9524961Abstract: In the semiconductor device including the off transistor serving as an ESD protection element and an output element between a first external connection terminal and a second external connection terminal connected to a VSS, a seal ring wire is connected in parallel, by a connection wire, to a first internal wire extending from the second external connection terminal to the source of the off transistor, and a parasitic resistance of the first internal wire is smaller than a parasitic resistance of a second internal wire connecting the source of the off transistor and a source of the output element to each other.Type: GrantFiled: February 2, 2016Date of Patent: December 20, 2016Assignee: SII Semiconductor CorporationInventors: Masayuki Hashitani, Hisashi Hasegawa, Takayuki Takashina, Hiroyuki Masuko
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Publication number: 20160233207Abstract: In the semiconductor device including the off transistor serving as an ESD protection element and an output element between a first external connection terminal and a second external connection terminal connected to a VSS, a seal ring wire is connected in parallel, by a connection wire, to a first internal wire extending from the second external connection terminal to the source of the off transistor, and a parasitic resistance of the first internal wire is smaller than a parasitic resistance of a second internal wire connecting the source of the off transistor and a source of the output element to each other.Type: ApplicationFiled: February 2, 2016Publication date: August 11, 2016Inventors: Masayuki HASHITANI, Hisashi HASEGAWA, Takayuki TAKASHINA, Hiroyuki MASUKO
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Patent number: 7750409Abstract: Provided is a semiconductor device including an n-type metal oxide semiconductor transistor for electrostatic discharge protection including drain regions connected with a first metal interconnect and source regions connected with another first metal interconnect alternately placed with each other, and gate electrodes each placed between each of the drain regions and each of the source regions, in which: at least one of the first metal interconnect and the other first metal interconnect being connected to a plurality of layers of metal interconnects other than the first metal interconnect; and the source regions include via-holes for electrically connecting the other first metal interconnect and the plurality of layers of metal interconnects other than the first metal interconnect, a greater number of the via-holes is formed as a distance of an interconnect connected to the NMOS transistor for ESD protection becomes larger.Type: GrantFiled: August 14, 2008Date of Patent: July 6, 2010Assignee: Seiko Instruments Inc.Inventors: Hiroaki Takasu, Takayuki Takashina, Sukehiro Yamamoto
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Publication number: 20090050968Abstract: Provided is a semiconductor device including an n-type metal oxide semiconductor transistor for electrostatic discharge protection including drain regions connected with a first metal interconnect and source regions connected with another first metal interconnect alternately placed with each other, and gate electrodes each placed between each of the drain regions and each of the source regions, in which: at least one of the first metal interconnect and the other first metal interconnect being connected to a plurality of layers of metal interconnects other than the first metal interconnect; and the source regions include via-holes for electrically connecting the other first metal interconnect and the plurality of layers of metal interconnects other than the first metal interconnect, a greater number of the via-holes is formed as a distance of an interconnect connected to the NMOS transistor for ESD protection becomes larger.Type: ApplicationFiled: August 14, 2008Publication date: February 26, 2009Inventors: Hiroaki Takasu, Takayuki Takashina, Sukehiro Yamamoto
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Patent number: 6242890Abstract: A charge/discharge control circuit is provided for an electric power source apparatus in which a service life is prolonged. A voltage dividing circuit, an overcharge voltage detection circuit, an overdischarge voltage detection circuit and a control circuit are connected in parallel to a secondary cell which is an electric power source, wherein the control circuit detects a condition of the secondary cell from the overcharge/overdischarge voltage detection circuits and outputs a signal Vs for controlling a power supply to an external equipment and a charge by an external power source and controls a switching element provided in series with the voltage dividing circuit and reduces a current which flows through the voltage dividing circuit.Type: GrantFiled: April 20, 2000Date of Patent: June 5, 2001Assignee: Seiko Instruments Inc.Inventors: Minoru Sudo, Takayuki Takashina, Yoshikazu Kojima, Sadashi Shimoda, Hiroshi Mukainakano
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Patent number: 6181108Abstract: A charge/discharge control circuit is provided for an electric power source apparatus in which a service life is prolonged. A voltage dividing circuit, an overcharge voltage detection circuit, an overdischarge voltage detection circuit and a control circuit are connected in parallel to a secondary cell which is an electric power source, wherein the control circuit detects a condition of the secondary cell from the overcharge/overdischarge voltage detection circuits and outputs a signal Vs for controlling a power supply to an external equipment and a charge by an external power source and controls a switching element provided in series with the voltage dividing circuit and reduces a current which flows through the voltage dividing circuit.Type: GrantFiled: November 20, 1998Date of Patent: January 30, 2001Assignee: Seiko Instruments Inc.Inventors: Minoru Sudo, Takayuki Takashina, Yoshikazu Kojima, Sadashi Shimoda, Hiroshi Mukainakano
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Patent number: 6127808Abstract: A charge/discharge control circuit is provided for an electric power source apparatus in which a service life is prolonged. A voltage dividing circuit, an overcharge voltage detection circuit, an overdischarge voltage detection circuit and a control circuit are connected in parallel to a secondary cell which is an electric power source, wherein the control circuit detects a condition of the secondary cell from the overcharge/overdischarge voltage detection circuits and outputs a signal Vs for controlling a power supply to an external equipment and a charge by an external power source and controls a switching element provided in series with the voltage dividing circuit and reduces a current which flows through the voltage dividing circuit.Type: GrantFiled: November 20, 1998Date of Patent: October 3, 2000Assignee: Seiko Instruments Inc.Inventors: Minoru Sudo, Takayuki Takashina, Yoshikazu Kojima, Sadashi Shimoda, Hiroshi Mukainakano
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Patent number: 6097177Abstract: A charge/discharge control circuit for controlling the charging and discharging of a secondary cell has a voltage dividing circuit for dividing an output voltage of the secondary cell, which may comprise plural cells, an overcharge detection circuit for detecting an overcharge state of the secondary cell, an overdischarge detection circuit for detecting an overdischarge state of the secondary cell, and a control circuit for receiving and processing an output signal of the overcharge detecting circuit and the overdischarge detecting circuit and controlling the switch. In a preferred embodiment, an overcharge reference voltage source used for the overcharge voltage detection circuit is used also as an overdischarge reference voltage source for the overdischarge voltage detection circuit.Type: GrantFiled: November 20, 1998Date of Patent: August 1, 2000Assignee: Seiko Instruments Inc.Inventors: Minoru Sudo, Takayuki Takashina, Yoshikazu Kojima, Sadashi Shimoda, Hiroshi Mukainakano
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Patent number: 6087807Abstract: A charge/discharge control circuit is provided for an electric power source apparatus in which a service life is prolonged. A voltage dividing circuit, an overcharge voltage detection circuit, an overdischarge voltage detection circuit and a control circuit are connected in parallel to a secondary cell which is an electric power source, wherein the control circuit detects a condition of the secondary cell from the overcharge/overdischarge voltage detection circuits and outputs a signal Vs for controlling a power supply to an external equipment and a charge by an external power source and controls a switching element provided in series with the voltage dividing circuit and reduces a current which flows through the voltage dividing circuit.Type: GrantFiled: June 9, 1998Date of Patent: July 11, 2000Assignee: Seiko Instruments Inc.Inventors: Minoru Sudo, Takayuki Takashina, Yoshikazu Kojima, Sadashi Shimoda, Hiroshi Mukainakano
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Patent number: 6054841Abstract: A charge/discharge control circuit is provided for an electric power source apparatus in which a service life is prolonged. A voltage dividing circuit, an overcharge voltage detection circuit, an overdischarge voltage detection circuit and a control circuit are connected in parallel to a secondary cell which is an electric power source, wherein the control circuit detects a condition of the secondary cell from the overcharge/overdischarge voltage detection circuits and outputs a signal Vs for controlling a power supply to an external equipment and a charge by an external power source and controls a switching element provided in series with the voltage dividing circuit and reduces a current which flows through the voltage dividing circuit.Type: GrantFiled: November 20, 1998Date of Patent: April 25, 2000Assignee: Seiko Instruments Inc.Inventors: Minoru Sudo, Takayuki Takashina, Yoshikazu Kojima, Sadashi Shimoda, Hiroshi Mukainakano
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Patent number: 5998974Abstract: A charge/discharge control circuit has a voltage detector for detecting a voltage level of a secondary cell, a switch connected in series with the secondary cell, and a control circuit connected in parallel with the voltage detector for receiving and processing an output signal of the voltage detector and controlling an impedance of the switch. The voltage detector, the switch and the control circuit are integrated in a single substrate. In a preferred embodiment, the switch comprises an external connection terminal and a second terminal connected to the secondary cell, a first IGFET connected between the first and second terminals, a second IGFET connectected between the first terminal and a substrate electrode of the first IGFET, and a third IGFET connected between the second terminal and the substrate electrode of the first IGFET.Type: GrantFiled: November 20, 1998Date of Patent: December 7, 1999Assignee: Seiko Instruments Inc.Inventors: Minoru Sudo, Takayuki Takashina, Yoshikazu Kojima, Sadashi Shimoda, Hiroshi Mukainakano
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Patent number: 5982150Abstract: A charge/discharge control circuit is provided for an electric power source apparatus in which a service life is prolonged. A voltage dividing circuit, an overcharge voltage detection circuit, an overdischarge voltage detection circuit and a control circuit are connected in parallel to a secondary cell which is an electric power source, wherein the control circuit detects a condition of the secondary cell from the overcharge/overdischarge voltage detection circuits and outputs a signal Vs for controlling a power supply to an external equipment and a charge by an external power source and controls a switching element provided in series with the voltage dividing circuit and reduces a current which flows through the voltage dividing circuit.Type: GrantFiled: November 20, 1998Date of Patent: November 9, 1999Assignee: Seiko Instruments Inc.Inventors: Minoru Sudo, Takayuki Takashina, Yoshikazu Kojima, Sadashi Shimoda, Hiroshi Mukainakano
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Patent number: 5959436Abstract: A charge/discharge control circuit cuts off a current path to stop charging of an abnormal secondary cell when the voltage of the secondary cell is less than the threshold voltage of a MOS transistor.Type: GrantFiled: February 3, 1998Date of Patent: September 28, 1999Assignee: Seiko Instruments Inc.Inventors: Takayuki Takashina, Shinichi Yoshida, Hiroshi Mukainakano
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Patent number: 5841265Abstract: A charge/discharge control circuit comprises two serially connected electric power sources and two overcharge/overdischarge detection circuits. A control circuit outputs a signal for controlling the charge/discharge of the electric power sources in accordance with signals from the two overcharge/overdischarge detection circuits. An intermediate voltage receiving circuit receives, in accordance with the signal from the control circuit, a voltage at a junction point between the two electric power sources and outputs a signal indicative of a relation of the relative voltage between the two electric power sources.Type: GrantFiled: March 12, 1997Date of Patent: November 24, 1998Assignee: Seiko Instruments Inc.Inventors: Minoru Sudo, Takayuki Takashina, Yoshikazu Kojima, Sadashi Shimoda, Hiroshi Mukainakano
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Patent number: 5742148Abstract: A chargeable power supply which has a charge/discharge control circuit is provided in which the service life of a secondary cell is prolonged. A voltage dividing circuit, an overcharge voltage detection circuit, an overdischarge detection circuit and a control circuit are connected in parallel to the secondary cell. The control circuit receives signals indicating the condition of the secondary cell from the overcharge/overdischarge voltage detection circuits and outputs a signal for controlling a switch circuit for disconnecting the secondary cell from external equipment, or to stop a charging operation by an external power source. The control circuit also controls a switching element provided in series with the voltage dividing circuit and reduces a current which flows through the dividing circuit. A current limiting means is provided to limit the current consumption of the charge/discharge control circuit.Type: GrantFiled: November 17, 1993Date of Patent: April 21, 1998Assignee: Seiko Instruments Inc.Inventors: Minoru Sudo, Takayuki Takashina, Yoshikazu Kojima, Sadashi Shimoda, Hiroshi Mukainakano