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).
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Patent number: 9244025Abstract: 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: GrantFiled: June 16, 2014Date of Patent: January 26, 2016Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Daisuke Ohgarane, Koji Dairiki, Masahiro Takahashi, Shunichi Ito, Erika Takahashi
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Publication number: 20150008321Abstract: 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: ApplicationFiled: June 16, 2014Publication date: January 8, 2015Inventors: Daisuke OHGARANE, Koji DAIRIKI, Masahiro TAKAHASHI, Shunichi ITO, Erika TAKAHASHI
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Patent number: 8664722Abstract: 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: GrantFiled: November 4, 2011Date of Patent: March 4, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Takashi Shingu, Daisuke Ohgarane, Yurika Sato
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Patent number: 8546210Abstract: 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: GrantFiled: June 4, 2010Date of Patent: October 1, 2013Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yoshiaki Yamamoto, Koichiro Tanaka, Atsuo Isobe, Daisuke Ohgarane, Shunpei Yamazaki
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Publication number: 20120049276Abstract: 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: ApplicationFiled: November 4, 2011Publication date: March 1, 2012Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Takashi SHINGU, Daisuke Ohgarane, Yurika Sato
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Patent number: 8053289Abstract: 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: GrantFiled: October 15, 2008Date of Patent: November 8, 2011Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Takashi Shingu, Daisuke Ohgarane, Yurika Sato
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Patent number: 8048749Abstract: 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: GrantFiled: July 23, 2008Date of Patent: November 1, 2011Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Tomokazu Yokoi, Atsuo Isobe, Motomu Kurata, Takeshi Shichi, Daisuke Ohgarane, Takashi Shingu
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Publication number: 20100237354Abstract: 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: ApplicationFiled: June 4, 2010Publication date: September 23, 2010Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Yoshiaki YAMAMOTO, Koichiro TANAKA, Atsuo ISOBE, Daisuke OHGARANE, Shunpei YAMAZAKI
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Patent number: 7736964Abstract: 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: GrantFiled: November 16, 2005Date of Patent: June 15, 2010Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yoshiaki Yamamoto, Koichiro Tanaka, Atsuo Isobe, Daisuke Ohgarane, Shunpei Yamazaki
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Publication number: 20090096024Abstract: 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: ApplicationFiled: October 15, 2008Publication date: April 16, 2009Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Takashi SHINGU, Daisuke OHGARANE, Yurika SATO
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Publication number: 20090029514Abstract: 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: ApplicationFiled: July 23, 2008Publication date: January 29, 2009Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Tomokazu YOKOI, Atsuo ISOBE, Motomu KURATA, Takeshi SHICHI, Daisuke OHGARANE, Takashi SHINGU
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Publication number: 20060110863Abstract: 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: ApplicationFiled: November 16, 2005Publication date: May 25, 2006Inventors: Yoshiaki Yamamoto, Koichiro Tanaka, Atsuo Isobe, Daisuke Ohgarane, Shunpei Yamazaki