Patents by Inventor Ayumi Ishigaki

Ayumi Ishigaki 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: 7452257
    Abstract: In order to suppress defect modes such as shrinkage or unevenness in light-emission in a light emitting element and to shorten a time needed for a pretreatment for forming a layer containing an organic compound (EL layer), according to the present invention, a light emitting element is formed by forming a first electrode that is electrically connected to a source region or a drain region of a thin film transistor, forming an insulating film to cover an edge portion of the first electrode, performing a plasma treatment on the first electrode and the insulating film in an atmosphere containing argon and oxygen, then, forming a layer containing an organic compound (EL layer) over the first electrode and the insulating film, and forming a second electrode over the layer containing an organic compound (EL layer).
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: November 18, 2008
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kaoru Tsuchiya, Ayumi Ishigaki, Keiko Saito
  • Patent number: 7303455
    Abstract: A light emitting element has been fabricated by making a barrier having a curved surface having a radius of curvature at the upper portion or lower portion, washing a surface of an anode with a porous sponge in order to remove minute grains dotted on the surface of the anode, and performing the vacuum heating in order to remove absorbed water of a whole of a substrate on which a TFT and the barrier have been provided immediately before a layer containing an organic compound is formed.
    Type: Grant
    Filed: April 19, 2006
    Date of Patent: December 4, 2007
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Murakami, Ritsuko Nagao, Masayuki Sakakura, Misako Nakazawa, Noriko Miyagi, Hisao Ikeda, Kaoru Tsuchiya, Ayumi Ishigaki, Masahiro Takahashi, Noriyuki Matsuda, Hiroki Ohara
  • Publication number: 20060211325
    Abstract: An object of the present invention is to reduce or eliminate the occurrence of a variety of failure modes (shrink, dark spot and the like) in a light emitting element having an organic compound. The present invention suppresses a non-light emitting region generated immediately after a light emitting element has been fabricated by making the barrier 111 have a curved surface having a radius of curvature at the upper portion or lower portion, washes the surface of the anode 110 with a porous sponge in order to remove minute grains dotted on the surface of the anode, and suppresses the occurrence of a shrink by performing the vacuum heating in order to remove absorbed water of a whole of the substrate on which a TFT and a barrier have been provided immediately before the layer 112 containing an organic compound is formed.
    Type: Application
    Filed: April 19, 2006
    Publication date: September 21, 2006
    Inventors: Satoshi Murakami, Ritsuko Nagao, Masayuki Sakakura, Misako Nakazawa, Noriko Miyagi, Hisao Ikeda, Kaoru Tsuchiya, Ayumi Ishigaki, Masahiro Takahashi, Noriyuki Matsuda, Hiroki Ohara
  • Patent number: 7037157
    Abstract: A light emitting element has been fabricated by making a barrier having a curved surface having a radius of curvature at the upper portion or lower portion, washing a surface of an anode with a porous sponge in order to remove minute grains dotted on the surface of the anode, and performing the vacuum heating in order to remove absorbed water of a whole of a substrate on which a TFT and the barrier have been provided immediately before a layer containing an organic compound is formed.
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: May 2, 2006
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Murakami, Ritsuko Nagao, Masayuki Sakakura, Misako Nakazawa, Noriko Miyagi, Hisao Ikeda, Kaoru Tsuchiya, Ayumi Ishigaki, Masahiro Takahashi, Noriyuki Matsuda, Hiroki Ohara
  • Publication number: 20040246432
    Abstract: In order to suppress defect modes such as shrinkage or unevenness in light-emission in a light emitting element and to shorten a time needed for a pretreatment for forming a layer containing an organic compound (EL layer), according to the present invention, a light emitting element is formed by forming a first electrode that is electrically connected to a source region or a drain region of a thin film transistor, forming an insulating film to cover an edge portion of the first electrode, performing a plasma treatment on the first electrode and the insulating film in an atmosphere containing argon and oxygen, then, forming a layer containing an organic compound (EL layer) over the first electrode and the insulating film, and forming a second electrode over the layer containing an organic compound (EL layer).
    Type: Application
    Filed: December 17, 2003
    Publication date: December 9, 2004
    Inventors: Kaoru Tsuchiya, Ayumi Ishigaki, Keiko Saito
  • Publication number: 20040018797
    Abstract: An object of the present invention is to reduce or eliminate the occurrence of a variety of failure modes (shrink, dark spot and the like) in a light emitting element having an organic compound. The present invention suppresses a non-light emitting region generated immediately after a light emitting element has been fabricated by making the barrier 111 have a curved surface having a radius of curvature at the upper portion or lower portion, washes the surface of the anode 110 with a porous sponge in order to remove minute grains dotted on the surface of the anode, and suppresses the occurrence of a shrink by performing the vacuum heating in order to remove absorbed water of a whole of the substrate on which a TFT and a barrier have been provided immediately before the layer 112 containing an organic compound is formed.
    Type: Application
    Filed: July 17, 2003
    Publication date: January 29, 2004
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Satoshi Murakami, Ritsuko Nagao, Masayuki Sakakura, Misako Nakazawa, Noriko Miyagi, Hisao Ikeda, Kaoru Tsuchiya, Ayumi Ishigaki, Masahiro Takahashi, Noriyuki Matsuda, Hiroki Ohara