Patents by Inventor Daisuke Ohgarane

Daisuke Ohgarane 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: 9244025
    Abstract: Provided is a transmission electron diffraction measurement apparatus including an electron gun; a first optical system under the electron gun; a sample chamber under the first optical system; a second optical system under the sample chamber; an observation chamber under the second optical system; a region that emits light by receiving energy from an electron in the observation chamber; and a camera facing the region.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: January 26, 2016
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Daisuke Ohgarane, Koji Dairiki, Masahiro Takahashi, Shunichi Ito, Erika Takahashi
  • Publication number: 20150008321
    Abstract: Provided is a transmission electron diffraction measurement apparatus including an electron gun; a first optical system under the electron gun; a sample chamber under the first optical system; a second optical system under the sample chamber; an observation chamber under the second optical system; a region that emits light by receiving energy from an electron in the observation chamber; and a camera facing the region.
    Type: Application
    Filed: June 16, 2014
    Publication date: January 8, 2015
    Inventors: Daisuke OHGARANE, Koji DAIRIKI, Masahiro TAKAHASHI, Shunichi ITO, Erika TAKAHASHI
  • Patent number: 8664722
    Abstract: In a method for manufacturing a semiconductor device, a semiconductor film formed over an insulator is doped with an impurity element to a depth less than the thickness of the semiconductor film, thereby forming an impurity doped layer; a metal silicide layer is formed on the impurity doped layer; the metal silicide layer and the semiconductor film are etched to form a recessed portion; and a layer which is not doped with the impurity element and is located at the bottom of the recessed portion of the semiconductor film is thinned to make a channel formation region. Further, a gate electrode is formed in the recessed portion over the thinned non impurity doped layer, with an insulating film interposed therebetween.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: March 4, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Takashi Shingu, Daisuke Ohgarane, Yurika Sato
  • Patent number: 8546210
    Abstract: It is an object of the present invention to provide a method of separating a thin film transistor, and circuit or a semiconductor device including the thin film transistor from a substrate by a method different from that disclosed in the patent document 1 and transposing the thin film transistor, and the circuit or the semiconductor device to a substrate having flexibility. According to the present invention, a large opening or a plurality of openings is formed at an insulating film, a conductive film connected to a thin film transistor is formed at the opening, and a peeling layer is removed, then, a layer having the thin film transistor is transposed to a substrate provided with a conductive film or the like. A thin film transistor according to the present invention has a semiconductor film which is crystallized by laser irradiation and prevents a peeling layer from exposing at laser irradiation not to be irradiated with laser light.
    Type: Grant
    Filed: June 4, 2010
    Date of Patent: October 1, 2013
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yoshiaki Yamamoto, Koichiro Tanaka, Atsuo Isobe, Daisuke Ohgarane, Shunpei Yamazaki
  • Publication number: 20120049276
    Abstract: In a method for manufacturing a semiconductor device, a semiconductor film formed over an insulator is doped with an impurity element to a depth less than the thickness of the semiconductor film, thereby forming an impurity doped layer; a metal silicide layer is formed on the impurity doped layer; the metal silicide layer and the semiconductor film are etched to form a recessed portion; and a layer which is not doped with the impurity element and is located at the bottom of the recessed portion of the semiconductor film is thinned to make a channel formation region. Further, a gate electrode is formed in the recessed portion over the thinned non impurity doped layer, with an insulating film interposed therebetween.
    Type: Application
    Filed: November 4, 2011
    Publication date: March 1, 2012
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Takashi SHINGU, Daisuke Ohgarane, Yurika Sato
  • Patent number: 8053289
    Abstract: In a method for manufacturing a semiconductor device, a semiconductor film formed over an insulator is doped with an impurity element to a depth less than the thickness of the semiconductor film, thereby forming an impurity doped layer; a metal silicide layer is formed on the impurity doped layer; the metal silicide layer and the semiconductor film are etched to form a recessed portion; and a layer which is not doped with the impurity element and is located at the bottom of the recessed portion of the semiconductor film is thinned to make a channel formation region. Further, a gate electrode is formed in the recessed portion over the thinned non impurity doped layer, with an insulating film interposed therebetween.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: November 8, 2011
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Takashi Shingu, Daisuke Ohgarane, Yurika Sato
  • Patent number: 8048749
    Abstract: A method for manufacturing a semiconductor device, by which a bottom gate thin film transistor that has an improved S value and a channel forming region with a smaller thickness than that of a source region and a drain region can be manufactured in a simple process. An island-like conductive film is formed over a surface of an insulating substrate in a portion corresponding to a channel forming region, and is covered with an insulating film to form a projection portion. After an amorphous semiconductor film is deposited to cover the projection portion, the amorphous semiconductor film is irradiated with laser light so as to be melted and crystallized. Part of the melted semiconductor over the projection portion flows into regions adjacent to both sides of the projection portion, which results in reduction in thickness of the semiconductor film over the projection portion (channel forming region).
    Type: Grant
    Filed: July 23, 2008
    Date of Patent: November 1, 2011
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Tomokazu Yokoi, Atsuo Isobe, Motomu Kurata, Takeshi Shichi, Daisuke Ohgarane, Takashi Shingu
  • Publication number: 20100237354
    Abstract: It is an object of the present invention to provide a method of separating a thin film transistor, and circuit or a semiconductor device including the thin film transistor from a substrate by a method different from that disclosed in the patent document 1 and transposing the thin film transistor, and the circuit or the semiconductor device to a substrate having flexibility. According to the present invention, a large opening or a plurality of openings is formed at an insulating film, a conductive film connected to a thin film transistor is formed at the opening, and a peeling layer is removed, then, a layer having the thin film transistor is transposed to a substrate provided with a conductive film or the like. A thin film transistor according to the present invention has a semiconductor film which is crystallized by laser irradiation and prevents a peeling layer from exposing at laser irradiation not to be irradiated with laser light.
    Type: Application
    Filed: June 4, 2010
    Publication date: September 23, 2010
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Yoshiaki YAMAMOTO, Koichiro TANAKA, Atsuo ISOBE, Daisuke OHGARANE, Shunpei YAMAZAKI
  • Patent number: 7736964
    Abstract: It is an object of the present invention to provide a method of separating a thin film transistor, and circuit or a semiconductor device including the thin film transistor from a substrate by a method different from that disclosed in the patent document 1 and transposing the thin film transistor, and the circuit or the semiconductor device to a substrate having flexibility. According to the present invention, a large opening or a plurality of openings is formed at an insulating film, a conductive film connected to a thin film transistor is formed at the opening, and a peeling layer is removed, then, a layer having the thin film transistor is transposed to a substrate provided with a conductive film or the like. A thin film transistor according to the present invention has a semiconductor film which is crystallized by laser irradiation and prevents a peeling layer from exposing at laser irradiation not to be irradiated with laser light.
    Type: Grant
    Filed: November 16, 2005
    Date of Patent: June 15, 2010
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yoshiaki Yamamoto, Koichiro Tanaka, Atsuo Isobe, Daisuke Ohgarane, Shunpei Yamazaki
  • Publication number: 20090096024
    Abstract: In a method for manufacturing a semiconductor device, a semiconductor film formed over an insulator is doped with an impurity element to a depth less than the thickness of the semiconductor film, thereby forming an impurity doped layer; a metal silicide layer is formed on the impurity doped layer; the metal silicide layer and the semiconductor film are etched to form a recessed portion; and a layer which is not doped with the impurity element and is located at the bottom of the recessed portion of the semiconductor film is thinned to make a channel formation region. Further, a gate electrode is formed in the recessed portion over the thinned non impurity doped layer, with an insulating film interposed therebetween.
    Type: Application
    Filed: October 15, 2008
    Publication date: April 16, 2009
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Takashi SHINGU, Daisuke OHGARANE, Yurika SATO
  • Publication number: 20090029514
    Abstract: A method for manufacturing a semiconductor device, by which a bottom gate thin film transistor that has an improved S value and a channel forming region with a smaller thickness than that of a source region and a drain region can be manufactured in a simple process. An island-like conductive film is formed over a surface of an insulating substrate in a portion corresponding to a channel forming region, and is covered with an insulating film to form a projection portion. After an amorphous semiconductor film is deposited to cover the projection portion, the amorphous semiconductor film is irradiated with laser light so as to be melted and crystallized. Part of the melted semiconductor over the projection portion flows into regions adjacent to both sides of the projection portion, which results in reduction in thickness of the semiconductor film over the projection portion (channel forming region).
    Type: Application
    Filed: July 23, 2008
    Publication date: January 29, 2009
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Tomokazu YOKOI, Atsuo ISOBE, Motomu KURATA, Takeshi SHICHI, Daisuke OHGARANE, Takashi SHINGU
  • Publication number: 20060110863
    Abstract: It is an object of the present invention to provide a method of separating a thin film transistor, and circuit or a semiconductor device including the thin film transistor from a substrate by a method different from that disclosed in the patent document 1 and transposing the thin film transistor, and the circuit or the semiconductor device to a substrate having flexibility. According to the present invention, a large opening or a plurality of openings is formed at an insulating film, a conductive film connected to a thin film transistor is formed at the opening, and a peeling layer is removed, then, a layer having the thin film transistor is transposed to a substrate provided with a conductive film or the like. A thin film transistor according to the present invention has a semiconductor film which is crystallized by laser irradiation and prevents a peeling layer from exposing at laser irradiation not to be irradiated with laser light.
    Type: Application
    Filed: November 16, 2005
    Publication date: May 25, 2006
    Inventors: Yoshiaki Yamamoto, Koichiro Tanaka, Atsuo Isobe, Daisuke Ohgarane, Shunpei Yamazaki