Patents by Inventor Keisuke Kuwahara

Keisuke Kuwahara 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: 20180148070
    Abstract: An automatic driving control apparatus includes a controller. Upon execution of automatic driving control, the controller determines, on the basis of positioning and map information, presence of a tollgate within a predetermined distance from a vehicle. The controller makes a transition to a tollgate passing mode, on a condition that the presence of the tollgate is determined within the predetermined distance and an increase in width of the road is recognized on the basis of the recognition of the outside environment. The controller causes the vehicle to approach the tollgate, on the basis of one or both of the map information and position information of an object recognized on the basis of the recognition of the outside environment, in a first period of time during which the tollgate passing mode is set and a position of the tollgate is unrecognizable on the basis of the recognition of the outside environment.
    Type: Application
    Filed: November 15, 2017
    Publication date: May 31, 2018
    Inventors: Akiyuki ABE, Masatoshi HOSHINA, Yasuhiro SEKIJIMA, Keisuke KUWAHARA
  • Patent number: 9117849
    Abstract: A method and apparatus of forming a nonvolatile semiconductor device including forming a first gate insulating film on a main surface of a first semiconductor region, forming a first gate electrode on the first gate insulating film, forming a second gate insulating film, forming a second gate electrode over a first side surface of the first gate electrode, selectively removing the second gate insulating film, etching the second gate insulating film kept between the second gate electrode and a main surface of the first semiconductor region in order to form an etched charge storage layer, introducing first impurities in the first semiconductor region in a self-aligned manner to the second gate electrode in order to form a second semiconductor region, annealing the semiconductor substrate to extend the second semiconductor region to an area under the second gate electrode.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: August 25, 2015
    Assignee: Renesas Electronics Corporation
    Inventors: Kenichi Akita, Daisuke Okada, Keisuke Kuwahara, Yasufumi Morimoto, Yasuhiro Shimamoto, Kan Yasui, Tsuyoshi Arigane, Tetsuya Ishimaru
  • Publication number: 20140322874
    Abstract: A charge storage layer interposed between a memory gate electrode and a semiconductor substrate is formed shorter than a gate length of the memory gate electrode or a length of insulating films so as to make the overlapping amount of the charge storage layer and a source region to be less than 40 nm. Therefore, in the write state, since the movement in the transverse direction of the electrons and the holes locally existing in the charge storage layer decreases, the variation of the threshold voltage when holding a high temperature can be reduced. In addition, the effective channel length is made to be 30 nm or less so as to reduce an apparent amount of holes so that coupling of the electrons with the holes in the charge storage layer decreases; therefore, the variation of the threshold voltage when holding at room temperature can be reduced.
    Type: Application
    Filed: July 8, 2014
    Publication date: October 30, 2014
    Inventors: Kenichi Akita, Daisuke Okada, Keisuke Kuwahara, Yasufumi Morimoto, Yasuhiro Shimamoto, Kan Yasui, Tsuyoshi Arigane, Tetsuya Ishimaru
  • Patent number: 8796756
    Abstract: A charge storage layer interposed between a memory gate electrode and a semiconductor substrate is formed shorter than a gate length of the memory gate electrode or a length of insulating films so as to make the overlapping amount of the charge storage layer and a source region to be less than 40 nm. Therefore, in the write state, since the movement in the transverse direction of the electrons and the holes locally existing in the charge storage layer decreases, the variation of the threshold voltage when holding a high temperature can be reduced. In addition, the effective channel length is made to be 30 nm or less so as to reduce an apparent amount of holes so that coupling of the electrons with the holes in the charge storage layer decreases; therefore, the variation of the threshold voltage when holding at room temperature can be reduced.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: August 5, 2014
    Assignee: Renesas Electronics Corporation
    Inventors: Kenichi Akita, Daisuke Okada, Keisuke Kuwahara, Yasafumi Morimoto, Yasuhiro Shimamoto, Kan Yasui, Tsuyoshi Arigane, Tetsuya Ishimaru
  • Publication number: 20130140622
    Abstract: A charge storage layer interposed between a memory gate electrode and a semiconductor substrate is formed shorter than a gate length of the memory gate electrode or a length of insulating films so as to make the overlapping amount of the charge storage layer and a source region to be less than 40 nm. Therefore, in the write state, since the movement in the transverse direction of the electrons and the holes locally existing in the charge storage layer decreases, the variation of the threshold voltage when holding a high temperature can be reduced. In addition, the effective channel length is made to be 30 nm or less so as to reduce an apparent amount of holes so that coupling of the electrons with the holes in the charge storage layer decreases; therefore, the variation of the threshold voltage when holding at room temperature can be reduced.
    Type: Application
    Filed: January 31, 2013
    Publication date: June 6, 2013
    Applicant: RENESAS ELECTRONICS CORPORATION
    Inventors: Kenichi Akita, Daisuke Okada, Keisuke Kuwahara, Yasufumi Morimoto, Yasuhiro Shimamoto, Kan Yasui, Tsuyoshi Arigane, Tetsuya Ishimaru
  • Patent number: 8390053
    Abstract: A charge storage layer interposed between a memory gate electrode and a semiconductor substrate is formed shorter than a gate length of the memory gate electrode or a length of insulating films so as to make the overlapping amount of the charge storage layer and a source region to be less than 40 nm. Therefore, in the write state, since the movement in the transverse direction of the electrons and the holes locally existing in the charge storage layer decreases, the variation of the threshold voltage when holding a high temperature can be reduced. In addition, the effective channel length is made to be 30 nm or less so as to reduce an apparent amount of holes so that coupling of the electrons with the holes in the charge storage layer decreases; therefore, the variation of the threshold voltage when holding at room temperature can be reduced.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: March 5, 2013
    Assignee: Renesas Electronics Corporation
    Inventors: Kenichi Akita, Daisuke Okada, Keisuke Kuwahara, Yasufumi Morimoto, Yasuhiro Shimamoto, Kan Yasui, Tsuyoshi Arigane, Tetsuya Ishimaru
  • Publication number: 20090050955
    Abstract: A charge storage layer interposed between a memory gate electrode and a semiconductor substrate is formed shorter than a gate length of the memory gate electrode or a length of insulating films so as to make the overlapping amount of the charge storage layer and a source region to be less than 40 nm. Therefore, in the write state, since the movement in the transverse direction of the electrons and the holes locally existing in the charge storage layer decreases, the variation of the threshold voltage when holding a high temperature can be reduced. In addition, the effective channel length is made to be 30 nm or less so as to reduce an apparent amount of holes so that coupling of the electrons with the holes in the charge storage layer decreases; therefore, the variation of the threshold voltage when holding at room temperature can be reduced.
    Type: Application
    Filed: August 8, 2008
    Publication date: February 26, 2009
    Inventors: Kenichi AKITA, Daisuke OKADA, Keisuke KUWAHARA, Yasufumi MORIMOTO, Yasuhiro SHIMAMOTO, Kan YASUI, Tsuyoshi ARIGANE, Tetsuya ISHIMARU