Patents by Inventor Etsuko Asano

Etsuko Asano 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: 9261554
    Abstract: To provide a semiconductor device capable of being easily subjected to a physical test without deteriorating characteristics. According to a measuring method of a semiconductor device in which an element layer provided with a test element including a terminal portion is sealed with first and second films having flexibility, the first film formed over the terminal portion is removed to form a contact hole reaching the terminal portion; the contact hole is filled with a resin containing a conductive material; heating is carried out after arranging a wiring substrate having flexibility over the resin with which filling has been performed so that the terminal portion and the wiring substrate having flexibility are electrically connected via the resin containing a conductive material; and a measurement is performed.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: February 16, 2016
    Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Takuya Tsurume, Etsuko Asano
  • Publication number: 20140368230
    Abstract: To provide a semiconductor device capable of being easily subjected to a physical test without deteriorating characteristics. According to a measuring method of a semiconductor device in which an element layer provided with a test element including a terminal portion is sealed with first and second films having flexibility, the first film formed over the terminal portion is removed to form a contact hole reaching the terminal portion; the contact hole is filled with a resin containing a conductive material; heating is carried out after arranging a wiring substrate having flexibility over the resin with which filling has been performed so that the terminal portion and the wiring substrate having flexibility are electrically connected via the resin containing a conductive material; and a measurement is performed.
    Type: Application
    Filed: August 28, 2014
    Publication date: December 18, 2014
    Inventors: Takuya TSURUME, Etsuko ASANO
  • Patent number: 8822272
    Abstract: To provide a semiconductor device capable of being easily subjected to a physical test without deteriorating characteristics. According to a measuring method of a semiconductor device in which an element layer provided with a test element including a terminal portion is sealed with first and second films having flexibility, the first film formed over the terminal portion is removed to form a contact hole reaching the terminal portion; the contact hole is filled with a resin containing a conductive material; heating is carried out after arranging a wiring substrate having flexibility over the resin with which filling has been performed so that the terminal portion and the wiring substrate having flexibility are electrically connected via the resin containing a conductive material; and a measurement is performed.
    Type: Grant
    Filed: March 17, 2006
    Date of Patent: September 2, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Takuya Tsurume, Etsuko Asano
  • Patent number: 8114719
    Abstract: An easy-to-use and inexpensive memory device is provided while maintaining product specifications and productivity even when a memory is formed on the same substrate as other functional circuits. The memory device of the invention includes a memory cell formed on an insulating surface. The memory cell includes a semiconductor film having two impurity regions, a gate electrode, and two wirings connected to the respective impurity regions. The two wirings are insulated from each other by applying a voltage between the gate electrode and at least one of the two wirings to alter the state of the semiconductor film.
    Type: Grant
    Filed: May 31, 2005
    Date of Patent: February 14, 2012
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kiyoshi Kato, Tetsuji Yamaguchi, Etsuko Asano, Konami Izumi
  • Patent number: 7714367
    Abstract: A semiconductor device of which manufacturing steps can be simplified by doping impurities at a time, and a manufacturing method thereof.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: May 11, 2010
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Saishi Fujikawa, Etsuko Asano, Tatsuya Arao, Takashi Yokoshima, Takuya Matsuo, Hidehito Kitakado
  • Patent number: 7567882
    Abstract: The present invention provides a method for evaluating an intended element or a parameter. In addition, the invention provides an evaluation method for obtaining a more precise result rapidly. According to the invention, a plurality of evaluation circuits are formed over the same substrate, and while simultaneously operating the plurality of evaluation circuits, an output of one evaluation circuit selected by a selection circuit that is formed over the substrate is arbitrarily evaluated.
    Type: Grant
    Filed: June 5, 2007
    Date of Patent: July 28, 2009
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Etsuko Asano, Kiyoshi Kato, Yutaka Shionoiri, Masahiko Hayakawa
  • Patent number: 7560293
    Abstract: The reliability of a GOLD structure TFT depends on an impurity concentration in its gate-overlapped region. Thus, it is an object of the present invention to obtain a resistance distribution corresponding to a tapered shape of a gate electrode in a gate-overlapped region. According to the present invention, plural TEGs are manufactured as Lov resistance monitors in which mask alignment is misaligned with several ?m interval to perform a resistance measurement on each of the TEGs. Consequently, a resistance distribution corresponding to a tapered shape can be obtained in a channel forming region, a gate-overlapped region and a source/drain region.
    Type: Grant
    Filed: July 19, 2007
    Date of Patent: July 14, 2009
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Etsuko Asano, Osamu Nakamura, Masayuki Sakakura
  • Patent number: 7521368
    Abstract: The present invention provides a method for manufacturing a semiconductor device having high characteristic and reliability. The etching damage during dry etching after forming an electrode or a wiring over an insulating film is prevented. The damage is suppressed by forming a conductive layer so that charged particles due to plasma during dry etching are not generated in a semiconductor layer. Accordingly, it is an object of the invention to provide a method not for generating the deterioration of the transistor characteristic especially in a thin film transistor having a minute structure.
    Type: Grant
    Filed: May 4, 2005
    Date of Patent: April 21, 2009
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Tetsuji Yamaguchi, Etsuko Asano, Naomi Yazaki, Tomoya Futamura, Tomoko Nishikawa
  • Publication number: 20080277660
    Abstract: To provide a semiconductor device capable of being easily subjected to a physical test without deteriorating characteristics. According to a measuring method of a semiconductor device in which an element layer provided with a test element including a terminal portion is sealed with first and second films having flexibility, the first film formed over the terminal portion is removed to form a contact hole reaching the terminal portion; the contact hole is filled with a resin containing a conductive material; heating is carried out after arranging a wiring substrate having flexibility over the resin with which filling has been performed so that the terminal portion and the wiring substrate having flexibility are electrically connected via the resin containing a conductive material; and a measurement is performed.
    Type: Application
    Filed: March 17, 2006
    Publication date: November 13, 2008
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Takuya Tsurume, Etsuko Asano
  • Publication number: 20080211024
    Abstract: An easy-to-use and inexpensive memory device is provided while maintaining product specifications and productivity even when a memory is formed on the same substrate as other functional circuits. The memory device of the invention includes a memory cell formed on an insulating surface. The memory cell includes a semiconductor film having two impurity regions, a gate electrode, and two wirings connected to the respective impurity regions. The two wirings are insulated from each other by applying a voltage between the gate electrode and at least one of the two wirings to alter the state of the semiconductor film.
    Type: Application
    Filed: May 31, 2005
    Publication date: September 4, 2008
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kiyoshi Kato, Tetsuji Yamaguchi, Etsuko Asano, Konami Izumi
  • Publication number: 20080026490
    Abstract: The reliability of a GOLD structure TFT depends on an impurity concentration in its gate-overlapped region. Thus, it is an object of the present invention to obtain a resistance distribution corresponding to a tapered shape of a gate electrode in a gate-overlapped region. According to the present invention, plural TEGs are manufactured as Lov resistance monitors in which mask alignment is misaligned with several ?m interval to perform a resistance measurement on each of the TEGs. Consequently, a resistance distribution corresponding to a tapered shape can be obtained in a channel forming region, a gate-overlapped region and a source/drain region.
    Type: Application
    Filed: July 19, 2007
    Publication date: January 31, 2008
    Inventors: Etsuko Asano, Osamu Nakamura, Masayuki Sakakura
  • Patent number: 7292955
    Abstract: The invention performs an AC stress test assuming the CMOS operation and an AC stress test using a ring oscillator (R.O.) between a DC stress test method using single semiconductor elements and an aging test method. The deterioration of a semiconductor apparatus can be estimated highly precisely by separately performing the AC stress test assuming the CMOS operation on OFF-stress and ON-stress.
    Type: Grant
    Filed: April 11, 2003
    Date of Patent: November 6, 2007
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Etsuko Asano, Masahiko Hayakawa, Yoshiko Ikeda
  • Publication number: 20070228371
    Abstract: The present invention provides a method for evaluating an intended element or a parameter. In addition, the invention provides an evaluation method for obtaining a more precise result rapidly. According to the invention, a plurality of evaluation circuits are formed over the same substrate, and while simultaneously operating the plurality of evaluation circuits, an output of one evaluation circuit selected by a selection circuit that is formed over the substrate is arbitrarily evaluated.
    Type: Application
    Filed: June 5, 2007
    Publication date: October 4, 2007
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Etsuko Asano, Kiyoshi Kato, Yutaka Shionoiri, Masahiko Hayakawa
  • Patent number: 7256079
    Abstract: The reliability of a GOLD structure TFT depends on an impurity concentration in its gate-overlapped region. Thus, it is an object of the present invention to obtain a resistance distribution corresponding to a tapered shape of a gate electrode in a gate-overlapped region. According to the present invention, plural TEGs are manufactured as Lov resistance monitors in which mask alignment is misaligned with several ?m interval to perform a resistance measurement on each of the TEGs. Consequently, a resistance distribution corresponding to a tapered shape can be obtained in a channel forming region, a gate-overlapped region and a source/drain region.
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: August 14, 2007
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Etsuko Asano, Osamu Nakamura, Masayuki Sakakura
  • Publication number: 20070170513
    Abstract: A semiconductor device of which manufacturing steps can be simplified by doping impurities at a time, and a manufacturing method thereof.
    Type: Application
    Filed: March 30, 2007
    Publication date: July 26, 2007
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Saishi Fujikawa, Etsuko Asano, Tatsuya Arao, Takashi Yokoshima, Takuya Matsuo, Hidehito Kitakado
  • Patent number: 7231310
    Abstract: The present invention provides a method for evaluating an intended element or a parameter. In addition, the invention provides an evaluation method for obtaining a more precise result rapidly. According to the invention, a plurality of evaluation circuits are formed over the same substrate, and while simultaneously operating the plurality of evaluation circuits, an output of one evaluation circuit selected by a selection circuit that is formed over the substrate is arbitrarily evaluated.
    Type: Grant
    Filed: May 19, 2005
    Date of Patent: June 12, 2007
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Etsuko Asano, Kiyoshi Kato, Yutaka Shionoiri, Masahiko Hayakawa
  • Patent number: 7202149
    Abstract: A semiconductor device of which manufacturing steps can be simplified by doping impurities at a time, and a manufacturing method thereof.
    Type: Grant
    Filed: December 14, 2004
    Date of Patent: April 10, 2007
    Assignees: Semiconductor Energy Laboratory Co., Ltd., Sharp Kabushiki Kaisha Co., Ltd.
    Inventors: Saishi Fujikawa, Etsuko Asano, Tatsuya Arao, Takashi Yokoshima, Takuya Matsuo, Hidehito Kitakado
  • Patent number: 7112982
    Abstract: It is an object of the present invention to provide a method for evaluating a semiconductor device including a semiconductor, an insulator, and a conductor. The present invention has a first step of applying a voltage to a conductor to measure a current value, a second step of dividing the current value by an area of a region in which a semiconductor is overlapped with the conductor to calculate a current density Jg, and a third step of calculating a depletion layer edge leakage current and an in-plane leakage current by using coefficients of a formula Jg=2A/r+B (A and B are respectively constants) that has a reciprocal of the radius r and the current density Jg.
    Type: Grant
    Filed: July 28, 2004
    Date of Patent: September 26, 2006
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Tatsuya Honda, Etsuko Asano
  • Publication number: 20050273290
    Abstract: The present invention provides a method for evaluating an intended element or a parameter. In addition, the invention provides an evaluation method for obtaining a more precise result rapidly. According to the invention, a plurality of evaluation circuits are formed over the same substrate, and while simultaneously operating the plurality of evaluation circuits, an output of one evaluation circuit selected by a selection circuit that is formed over the substrate is arbitrarily evaluated.
    Type: Application
    Filed: May 19, 2005
    Publication date: December 8, 2005
    Inventors: Etsuko Asano, Kiyoshi Kato, Yutaka Shionoiri, Masahiko Hayakawa
  • Publication number: 20050250308
    Abstract: The present invention provides a method for manufacturing a semiconductor device having high characteristic and reliability. The etching damage during dry etching after forming an electrode or a wiring over an insulating film is prevented. The damage is suppressed by forming a conductive layer so that charged particles due to plasma during dry etching are not generated in a semiconductor layer. Accordingly, it is an object of the invention to provide a method not for generating the deterioration of the transistor characteristic especially in a thin film transistor having a minute structure.
    Type: Application
    Filed: May 4, 2005
    Publication date: November 10, 2005
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Tetsuji Yamaguchi, Etsuko Asano, Naomi Yazaki, Tomoya Futamura, Tomoko Nishikawa