Patents by Inventor Taketomi Asami

Taketomi Asami 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: 10103211
    Abstract: In the case where a material containing an alkaline-earth metal in a cathode, is used, there is a fear of the diffusion of an impurity ion (such as alkaline-earth metal ion) from the EL element to the TFT being generated and causing the variation of characteristics of the TFT. Therefore, as the insulating film provided between TFT and EL element, a film containing a material for not only blocking the diffusion of an impurity ion such as an alkaline-earth metal ion but also aggressively absorbing an impurity ion such as an alkaline-earth metal ion is used.
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: October 16, 2018
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Murakami, Mitsuhiro Ichijo, Taketomi Asami
  • Publication number: 20170358638
    Abstract: In the case where a material containing an alkaline-earth metal in a cathode, is used, there is a fear of the diffusion of an impurity ion (such as alkaline-earth metal ion) from the EL element to the TFT being generated and causing the variation of characteristics of the TFT. Therefore, as the insulating film provided between TFT and EL element, a film containing a material for not only blocking the diffusion of an impurity ion such as an alkaline-earth metal ion but also aggressively absorbing an impurity ion such as an alkaline-earth metal ion is used.
    Type: Application
    Filed: August 4, 2017
    Publication date: December 14, 2017
    Inventors: Satoshi MURAKAMI, Mitsuhiro ICHIJO, Taketomi ASAMI
  • Patent number: 9761645
    Abstract: In the case where a material containing an alkaline-earth metal in a cathode, is used, there is a fear of the diffusion of an impurity ion (such as alkaline-earth metal ion) from the EL element to the TFT being generated and causing the variation of characteristics of the TFT. Therefore, as the insulating film provided between TFT and EL element, a film containing a material for not only blocking the diffusion of an impurity ion such as an alkaline-earth metal ion but also aggressively absorbing an impurity ion such as an alkaline-earth metal ion is used.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: September 12, 2017
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Murakami, Mitsuhiro Ichijo, Taketomi Asami
  • Publication number: 20160293684
    Abstract: In the case where a material containing an alkaline-earth metal in a cathode, is used, there is a fear of the diffusion of an impurity ion (such as alkaline-earth metal ion) from the EL element to the TFT being generated and causing the variation of characteristics of the TFT. Therefore, as the insulating film provided between TFT and EL element, a film containing a material for not only blocking the diffusion of an impurity ion such as an alkaline-earth metal ion but also aggressively absorbing an impurity ion such as an alkaline-earth metal ion is used.
    Type: Application
    Filed: June 9, 2016
    Publication date: October 6, 2016
    Inventors: Satoshi MURAKAMI, Mitsuhiro ICHIJO, Taketomi ASAMI
  • Patent number: 9368561
    Abstract: In the case where a material containing an alkaline-earth metal in a cathode, is used, there is a fear of the diffusion of an impurity ion (such as alkaline-earth metal ion) from the EL element to the TFT being generated and causing the variation of characteristics of the TFT. Therefore, as the insulating film provided between TFT and EL element, a film containing a material for not only blocking the diffusion of an impurity ion such as an alkaline-earth metal ion but also aggressively absorbing an impurity ion such as an alkaline-earth metal ion is used.
    Type: Grant
    Filed: August 7, 2014
    Date of Patent: June 14, 2016
    Assignee: Semiconductor Enery Laboratory Co., Ltd.
    Inventors: Satoshi Murakami, Mitsuhiro Ichijo, Taketomi Asami
  • Patent number: 8951902
    Abstract: The present invention is provided in order to remove contamination due to contaminant impurities of the interfaces of each film which forms a TFT, which is the major factor that reduces the reliability of TFTs. By connecting a washing chamber and a film formation chamber, film formation can be carried out without exposing TFTs to the air during the time from washing step to the film formation step and it becomes possible to maintain the cleanliness of the interfaces of each film which form the TFT.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: February 10, 2015
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Taketomi Asami, Mitsuhiro Ichijo, Satoshi Toriumi, Takashi Ohtsuki, Shunpei Yamazaki
  • Publication number: 20140346489
    Abstract: In the case where a material containing an alkaline-earth metal in a cathode, is used, there is a fear of the diffusion of an impurity ion (such as alkaline-earth metal ion) from the EL element to the TFT being generated and causing the variation of characteristics of the TFT. Therefore, as the insulating film provided between TFT and EL element, a film containing a material for not only blocking the diffusion of an impurity ion such as an alkaline-earth metal ion but also aggressively absorbing an impurity ion such as an alkaline-earth metal ion is used.
    Type: Application
    Filed: August 7, 2014
    Publication date: November 27, 2014
    Inventors: Satoshi MURAKAMI, Mitsuhiro ICHIJO, Taketomi ASAMI
  • Patent number: 8803152
    Abstract: In the case where a material containing an alkaline-earth metal in a cathode, is used, there is a fear of the diffusion of an impurity ion (such as alkaline-earth metal ion) from the EL element to the TFT being generated and causing the variation of characteristics of the TFT. Therefore, as the insulating film provided between TFT and EL element, a film containing a material for not only blocking the diffusion of an impurity ion such as an alkaline-earth metal ion but also aggressively absorbing an impurity ion such as an alkaline-earth metal ion is used.
    Type: Grant
    Filed: April 18, 2013
    Date of Patent: August 12, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Murakami, Mitsuhiro Ichijo, Taketomi Asami
  • Patent number: 8603899
    Abstract: At present, a forming process of a base film through an amorphous silicon film is conducted in respective film forming chambers in order to obtain satisfactory films. When continuous formation of the base film through the amorphous silicon film is performed in a single film forming chamber with the above film formation condition, crystallization is not sufficiently attained in a crystallization process. By forming the amorphous silicon film using silane gas diluted with hydrogen, crystallization is sufficiently attained in the crystallization process even with the continuous formation of the base film through the amorphous silicon film in the single film forming chamber.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: December 10, 2013
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Taketomi Asami, Mitsuhiro Ichijo, Satoshi Toriumi
  • Publication number: 20130228784
    Abstract: In the case where a material containing an alkaline-earth metal in a cathode, is used, there is a fear of the diffusion of an impurity ion (such as alkaline-earth metal ion) from the EL element to the TFT being generated and causing the variation of characteristics of the TFT. Therefore, as the insulating film provided between TFT and EL element, a film containing a material for not only blocking the diffusion of an impurity ion such as an alkaline-earth metal ion but also aggressively absorbing an impurity ion such as an alkaline-earth metal ion is used.
    Type: Application
    Filed: April 18, 2013
    Publication date: September 5, 2013
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi MURAKAMI, Mitsuhiro ICHIJO, Taketomi ASAMI
  • Patent number: 8450741
    Abstract: In the case where a material containing an alkaline-earth metal in a cathode, is used, there is a fear of the diffusion of an impurity ion (such as alkaline-earth metal ion) from the EL element to the TFT being generated and causing the variation of characteristics of the TFT. Therefore, as the insulating film provided between TFT and EL element, a film containing a material for not only blocking the diffusion of an impurity ion such as an alkaline-earth metal ion but also aggressively absorbing an impurity ion such as an alkaline-earth metal ion is used.
    Type: Grant
    Filed: September 6, 2011
    Date of Patent: May 28, 2013
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Murakami, Mitsuhiro Ichijo, Taketomi Asami
  • Patent number: 8304327
    Abstract: At present, a forming process of a base film through an amorphous silicon film is conducted in respective film forming chambers in order to obtain satisfactory films. When continuous formation of the base film through the amorphous silicon film is performed in a single film forming chamber with the above film formation condition, crystallization is not sufficiently attained in a crystallization process. By forming the amorphous silicon film using silane gas diluted with hydrogen, crystallization is sufficiently attained in the crystallization process even with the continuous formation of the base film through the amorphous silicon film in the single film forming chamber.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: November 6, 2012
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Taketomi Asami, Mitsuhiro Ichijo, Satoshi Toriumi
  • Publication number: 20120129329
    Abstract: The present invention is provided in order to remove contamination due to contaminant impurities of the interfaces of each film which forms a TFT, which is the major factor that reduces the reliability of TFTs. By connecting a washing chamber and a film formation chamber, film formation can be carried out without exposing TFTs to the air during the time from washing step to the film formation step and it becomes possible to maintain the cleanliness of the interfaces of each film which form the TFT.
    Type: Application
    Filed: January 31, 2012
    Publication date: May 24, 2012
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Taketomi ASAMI, Mitsuhiro ICHIJO, Satoshi TORIUMI, Takashi OHTSUKI, Shunpei YAMAZAKI
  • Patent number: 8138101
    Abstract: The present invention is provided in order to remove contamination due to contaminant impurities of the interfaces of each film which forms a TFT, which is the major factor that reduces the reliability of TFTs. By connecting a washing chamber and a film formation chamber, film formation can be carried out without exposing TFTs to the air during the time from washing step to the film formation step and it becomes possible to maintain the cleanliness of the interfaces of each film which form the TFT.
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: March 20, 2012
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Taketomi Asami, Mitsuhiro Ichijo, Satoshi Toriumi, Takashi Ohtsuki, Shunpei Yamazaki
  • Publication number: 20110315969
    Abstract: In the case where a material containing an alkaline-earth metal in a cathode, is used, there is a fear of the diffusion of an impurity ion (such as alkaline-earth metal ion) from the EL element to the TFT being generated and causing the variation of characteristics of the TFT. Therefore, as the insulating film provided between TFT and EL element, a film containing a material for not only blocking the diffusion of an impurity ion such as an alkaline-earth metal ion but also aggressively absorbing an impurity ion such as an alkaline-earth metal ion is used.
    Type: Application
    Filed: September 6, 2011
    Publication date: December 29, 2011
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Satoshi MURAKAMI, Mitsuhiro ICHIJO, Taketomi ASAMI
  • Patent number: 8022404
    Abstract: In the case where a material containing an alkaline-earth metal in a cathode, is used, there is a fear of the diffusion of an impurity ion (such as alkaline-earth metal ion) from the EL element to the TFT being generated and causing the variation of characteristics of the TFT. Therefore, as the insulating film provided between TFT and EL element, a film containing a material for not only blocking the diffusion of an impurity ion such as an alkaline-earth metal ion but also aggressively absorbing an impurity ion such as an alkaline-earth metal ion is used.
    Type: Grant
    Filed: June 16, 2008
    Date of Patent: September 20, 2011
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Murakami, Mitsuhiro Ichijo, Taketomi Asami
  • Patent number: 8012529
    Abstract: According to the invention, an insulating or semi-insulating barrier layer which has a thickness where a tunnel current can flow through is provided between a hole injection electrode and an organic compound layer with hole transport characteristics (a hole injection layer or a hole transport layer). Specifically, a thin insulating or semi-insulating barrier layer which contains silicon or silicon oxide; silicon or silicon oxide and a light transmitting conductive oxide material; or silicon or silicon oxide, a light transmitting conductive oxide material, and carbon may be provided between a light transmitting conductive oxide film formed of a light transmitting conductive oxide material, such as ITO and a hole injection layer containing an organic compound.
    Type: Grant
    Filed: July 18, 2007
    Date of Patent: September 6, 2011
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Junichiro Sakata, Masakazu Murakami, Koji Moriya, Yoshiaki Oikawa, Taketomi Asami, Hisashi Ohtani
  • Patent number: 7855416
    Abstract: Channel doping is an effective method for controlling Vth, but if Vth shifts to the order of ?4 to ?3 V when forming circuits such as a CMOS circuit formed from both an n-channel TFT and a P-channel TFT on the same substrate, then it is difficult to control the Vth of both TFTs with one channel dope. In order to solve the above problem, the present invention forms a blocking layer on the back channel side, which is a laminate of a silicon oxynitride film (A) manufactured from SiH4, NH3, and N2O, and a silicon oxynitride film (B) manufactured from SiH4 and N2O. By making this silicon oxynitride film laminate structure, contamination by alkaline metallic elements from the substrate can be prevented, and influence by stresses, caused by internal stress, imparted to the TFT can be relieved.
    Type: Grant
    Filed: November 24, 2008
    Date of Patent: December 21, 2010
    Assignee: Semiconductor Energy laboratory Co., Ltd.
    Inventors: Hidehito Kitakado, Masahiko Hayakawa, Shunpei Yamazaki, Taketomi Asami
  • Publication number: 20100151664
    Abstract: At present, a forming process of a base film through an amorphous silicon film is conducted in respective film forming chambers in order to obtain satisfactory films. When continuous formation of the base film through the amorphous silicon film is performed in a single film forming chamber with the above film formation condition, crystallization is not sufficiently attained in a crystallization process. By forming the amorphous silicon film using silane gas diluted with hydrogen, crystallization is sufficiently attained in the crystallization process even with the continuous formation of the base film through the amorphous silicon film in the single film forming chamber.
    Type: Application
    Filed: February 25, 2010
    Publication date: June 17, 2010
    Inventors: Taketomi Asami, Mitsuhiro Ichijo, Satoshi Toriumi
  • Patent number: 7670881
    Abstract: At present, a forming process of a base film through an amorphous silicon film is conducted in respective film forming chambers in order to obtain satisfactory films. When continuous formation of the base film through the amorphous silicon film is performed in a single film forming chamber with the above film formation condition, crystallization is not sufficiently attained in a crystallization process. By forming the amorphous silicon film using silane gas diluted with hydrogen, crystallization is sufficiently attained in the crystallization process even with the continuous formation of the base film through the amorphous silicon film in the single film forming chamber.
    Type: Grant
    Filed: March 8, 2007
    Date of Patent: March 2, 2010
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Taketomi Asami, Mitsuhiro Ichijo, Satoshi Toriumi