Patents by Inventor Yoshiaki Oikawa

Yoshiaki Oikawa 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: 10629627
    Abstract: The semiconductor device includes a driver circuit portion including a driver circuit and a pixel portion including a pixel. The pixel includes a gate electrode layer having a light-transimitting property, a gate insulating layer, a source electrode layer and a drain electrode layer each having a light-transmitting property provided over the gate insulating layer, an oxide semiconductor layer covering top surfaces and side surfaces of the source electrode layer and the drain electrode layer and provided over the gate electrode layer with the gate insulating layer therebetween, a conductive layer provided over part of the oxide semiconductor layer and having a lower resistance than the source electrode layer and the drain electrode layer, and an oxide insulating layer in contact with part of the oxide semiconductor layer.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: April 21, 2020
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Masayuki Sakakura, Yoshiaki Oikawa, Shunpei Yamazaki, Junichiro Sakata, Masashi Tsubuku, Kengo Akimoto, Miyuki Hosoba
  • Publication number: 20200111914
    Abstract: The transistor includes a first gate electrode, a first insulating film over the first gate electrode, an oxide semiconductor film over the first insulating film, a source electrode over the oxide semiconductor film, a drain electrode over the oxide semiconductor film, a second insulating film over the oxide semiconductor film, the source electrode, and the drain electrode, and a second gate electrode over the second insulating film. The first insulating film includes a first opening. A connection electrode electrically connected to the first gate electrode through the first opening is formed over the first insulating film. The second insulating film includes a second opening that reaches the connection electrode. The second gate electrode includes an oxide conductive film and a metal film over the oxide conductive film. The connection electrode and the second gate electrode are electrically connected to each other through the metal film.
    Type: Application
    Filed: December 5, 2019
    Publication date: April 9, 2020
    Inventors: Yoshiaki OIKAWA, Nobuharu OHSAWA, Masami JINTYOU, Yasutaka NAKAZAWA
  • Publication number: 20200066761
    Abstract: The semiconductor device includes a driver circuit portion including a driver circuit and a pixel portion including a pixel. The pixel includes a gate electrode layer having a light-transmitting property, a gate insulating layer, a source electrode layer and a drain electrode layer each having a light-transmitting property provided over the gate insulating layer, an oxide semiconductor layer covering top surfaces and side surfaces of the source electrode layer and the drain electrode layer and provided over the gate electrode layer with the gate insulating layer therebetween, a conductive layer provided over part of the oxide semiconductor layer and having a lower resistance than the source electrode layer and the drain electrode layer, and an oxide insulating layer in contact with part of the oxide semiconductor layer.
    Type: Application
    Filed: November 4, 2019
    Publication date: February 27, 2020
    Inventors: Masayuki SAKAKURA, Yoshiaki OIKAWA, Shunpei YAMAZAKI, Junichiro SAKATA, Masashi TSUBUKU, Kengo AKIMOTO, Miyuki HOSOBA
  • Patent number: 10559697
    Abstract: The transistor includes a first gate electrode, a first insulating film over the first gate electrode, an oxide semiconductor film over the first insulating film, a source electrode over the oxide semiconductor film, a drain electrode over the oxide semiconductor film, a second insulating film over the oxide semiconductor film, the source electrode, and the drain electrode, and a second gate electrode over the second insulating film. The first insulating film includes a first opening. A connection electrode electrically connected to the first gate electrode through the first opening is formed over the first insulating film. The second insulating film includes a second opening that reaches the connection electrode. The second gate electrode includes an oxide conductive film and a metal film over the oxide conductive film. The connection electrode and the second gate electrode are electrically connected to each other through the metal film.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: February 11, 2020
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yoshiaki Oikawa, Nobuharu Ohsawa, Masami Jintyou, Yasutaka Nakazawa
  • Publication number: 20190355592
    Abstract: An object is to provide a display device with excellent display characteristics, where a pixel circuit and a driver circuit provided over one substrate are formed using transistors which have different structures corresponding to characteristics of the respective circuits. The driver circuit portion includes a driver circuit transistor in which a gate electrode layer, a source electrode layer, and a drain electrode layer are formed using a metal film, and a channel layer is formed using an oxide semiconductor. The pixel portion includes a pixel transistor in which a gate electrode layer, a source electrode layer, and a drain electrode layer are formed using an oxide conductor, and a semiconductor layer is formed using an oxide semiconductor. The pixel transistor is formed using a light-transmitting material, and thus, a display device with higher aperture ratio can be manufactured.
    Type: Application
    Filed: July 30, 2019
    Publication date: November 21, 2019
    Inventors: Shunpei YAMAZAKI, Junichiro SAKATA, Masashi TSUBUKU, Kengo AKIMOTO, Miyuki HOSOBA, Masayuki SAKAKURA, Yoshiaki OIKAWA
  • Publication number: 20190326538
    Abstract: An object of the invention is to improve the reliability of a light-emitting device. Another object of the invention is to provide flexibility to a light-emitting device having a thin film transistor using an oxide semiconductor film. A light-emitting device has, over one flexible substrate, a driving circuit portion including a thin film transistor for a driving circuit and a pixel portion including a thin film transistor for a pixel. The thin film transistor for a driving circuit and the thin film transistor for a pixel are inverted staggered thin film transistors including an oxide semiconductor layer which is in contact with a part of an oxide insulating layer.
    Type: Application
    Filed: July 1, 2019
    Publication date: October 24, 2019
    Inventors: Shingo EGUCHI, Yoshiaki OIKAWA, Kenichi OKAZAKI, Hotaka MARUYAMA
  • Patent number: 10418586
    Abstract: It is an object to provide a flexible light-emitting device with high reliability in a simple way. Further, it is an object to provide an electronic device or a lighting device each mounted with the light-emitting device. A light-emitting device with high reliability can be obtained with the use of a light-emitting device having the following structure: an element portion including a light-emitting element is interposed between a substrate having flexibility and a light-transmitting property with respect to visible light and a metal substrate; and insulating layers provided over and under the element portion are in contact with each other in the outer periphery of the element portion to seal the element portion. Further, by mounting an electronic device or a lighting device with a light-emitting device having such a structure, an electronic device or a lighting device with high reliability can be obtained.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: September 17, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Kaoru Hatano, Masahiro Katayama, Shingo Eguchi, Yoshiaki Oikawa, Ami Nakamura
  • Patent number: 10388796
    Abstract: A semiconductor device with favorable electrical characteristics is provided. The semiconductor device includes a first conductor over a substrate; a first insulator over the first conductor; an oxide over the first insulator; a second insulator over the oxide; a second conductor over the second insulator; a third insulator over the second conductor; a fourth insulator in contact with a side surface of the second insulator, a side surface of the second conductor, and a side surface of the third insulator; and a fifth insulator in contact with the oxide, the first insulator, and the fourth insulator. The first insulator and the fifth insulator are in contact with each other in a region on the periphery of the side of the oxide. The oxide includes a first region where a channel is formed; a second region adjacent to the first region; a third region adjacent to the second region; and a fourth region adjacent to the third region.
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: August 20, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Yuta Endo, Yoshiaki Oikawa
  • Patent number: 10373843
    Abstract: An object is to provide a display device with excellent display characteristics, where a pixel circuit and a driver circuit provided over one substrate are formed using transistors which have different structures corresponding to characteristics of the respective circuits. The driver circuit portion includes a driver circuit transistor in which a gate electrode layer, a source electrode layer, and a drain electrode layer are formed using a metal film, and a channel layer is formed using an oxide semiconductor. The pixel portion includes a pixel transistor in which a gate electrode layer, a source electrode layer, and a drain electrode layer are formed using an oxide conductor, and a semiconductor layer is formed using an oxide semiconductor. The pixel transistor is formed using a light-transmitting material, and thus, a display device with higher aperture ratio can be manufactured.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: August 6, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Junichiro Sakata, Masashi Tsubuku, Kengo Akimoto, Miyuki Hosoba, Masayuki Sakakura, Yoshiaki Oikawa
  • Patent number: 10374184
    Abstract: An object of the invention is to improve the reliability of a light-emitting device. Another object of the invention is to provide flexibility to a light-emitting device having a thin film transistor using an oxide semiconductor film. A light-emitting device has, over one flexible substrate, a driving circuit portion including a thin film transistor for a driving circuit and a pixel portion including a thin film transistor for a pixel. The thin film transistor for a driving circuit and the thin film transistor for a pixel are inverted staggered thin film transistors including an oxide semiconductor layer which is in contact with a part of an oxide insulating layer.
    Type: Grant
    Filed: October 24, 2016
    Date of Patent: August 6, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shingo Eguchi, Yoshiaki Oikawa, Kenichi Okazaki, Hotaka Maruyama
  • Publication number: 20190238982
    Abstract: The present technology relates to a signal processing device, a signal processing method, and a program that enable different sounds to be reproduced in a remote location and a neighboring location. A signal processing device includes: a remote filter unit configured to generate a remote sound reproduction signal for reproducing a sound in a remote audible region, by performing filter processing on a first sound source signal using a remote sound reproduction filter coefficient; and a neighboring filter unit configured to generate a neighboring sound reproduction signal for reproducing a sound in a neighboring audible region that is different from the remote audible region, by performing filter processing on a second sound source signal using a neighboring sound reproduction filter coefficient. The present technology can be applied to a remote-neighborhood separate sound field formation device.
    Type: Application
    Filed: September 22, 2017
    Publication date: August 1, 2019
    Applicant: Sony Corporation
    Inventors: Yu Maeno, Yuhki Mitsufuji, Yoshiaki Oikawa
  • Patent number: 10361258
    Abstract: Thinned and highly reliable light emitting elements are provided. Further, light emitting devices in which light emitting elements are formed over flexible substrates are manufactured with high yield. One light emitting device includes a flexible substrate, a light emitting element faulted over the flexible substrate, and a resin film covering the light emitting element, and in the light emitting element, an insulating layer serving as a partition has a convex portion and the convex portion is embedded in the resin film, that is, the resin film covers an entire surface of the insulating layer and an entire surface of the second electrode, whereby the light emitting element can be thinned and highly reliable. In addition, a light emitting device can be manufactured with high yield in a manufacturing process thereof.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: July 23, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Masahiro Katayama, Shingo Eguchi, Yoshiaki Oikawa, Ami Nakamura, Satoshi Seo, Kaoru Hatano
  • Publication number: 20190189856
    Abstract: An object is to provide a highly reliable light emitting device which is thin and is not damaged by external local pressure. Further, another object is to manufacture a light emitting device with a high yield by preventing defects of a shape and characteristics due to external stress in a manufacture process. A light emitting element is sealed between a first structure body in which a fibrous body is impregnated with an organic resin and a second structure body in which a fibrous body is impregnated with an organic resin, whereby a highly reliable light emitting device which is thin and has intensity can be provided. Further, a light emitting device can be manufactured with a high yield by preventing defects of a shape and characteristics in a manufacture process.
    Type: Application
    Filed: February 7, 2019
    Publication date: June 20, 2019
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yoshiaki OIKAWA, Shingo Eguchi, Mitsuo Mashiyama, Masatoshi Kataniwa, Hironobu Shoji, Masataka Nakada, Satoshi Seo
  • Patent number: 10297679
    Abstract: Disclosed is a method to manufacture a thin film transistor having an oxide semiconductor as a channel formation region. The method includes; forming an oxide semiconductor layer over a gate insulating layer; forming a source and drain electrode layers over and in contact with the oxide semiconductor layer so that at least portion of the oxide semiconductor layer is exposed; and forming an oxide insulating film over and in contact with the oxide semiconductor layer. The exposed portion of the oxide semiconductor may be exposed to a gas containing oxygen in the presence of plasma before the formation of the oxide insulating film. The method allows oxygen to be diffused into the oxide semiconductor layer, which contributes to the excellent characteristics of the thin film transistor.
    Type: Grant
    Filed: February 5, 2018
    Date of Patent: May 21, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yoshiaki Oikawa, Kenichi Okazaki, Hotaka Maruyama
  • Patent number: 10243005
    Abstract: An object is to improve reliability of a semiconductor device. A semiconductor device including a driver circuit portion and a display portion (also referred to as a pixel portion) over the same substrate is provided. The driver circuit portion and the display portion include thin film transistors in which a semiconductor layer includes an oxide semiconductor; a first wiring; and a second wiring. The thin film transistors each include a source electrode layer and a drain electrode layer which each have a shape whose end portions are located on an inner side than end portions of the semiconductor layer. In the thin film transistor in the driver circuit portion, the semiconductor layer is provided between a gate electrode layer and a conductive layer. The first wiring and the second wiring are electrically connected in an opening provided in a gate insulating layer through an oxide conductive layer.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: March 26, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Junichiro Sakata, Masayuki Sakakura, Yoshiaki Oikawa, Kenichi Okazaki, Hotaka Maruyama
  • Patent number: 10205062
    Abstract: An object is to provide a highly reliable light emitting device which is thin and is not damaged by external local pressure. Further, another object is to manufacture a light emitting device with a high yield by preventing defects of a shape and characteristics due to external stress in a manufacture process. A light emitting element is sealed between a first structure body in which a fibrous body is impregnated with an organic resin and a second structure body in which a fibrous body is impregnated with an organic resin, whereby a highly reliable light emitting device which is thin and has intensity can be provided. Further, a light emitting device can be manufactured with a high yield by preventing defects of a shape and characteristics in a manufacture process.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: February 12, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yoshiaki Oikawa, Shingo Eguchi, Mitsuo Mashiyama, Masatoshi Kataniwa, Hironobu Shoji, Masataka Nakada, Satoshi Seo
  • Publication number: 20190005035
    Abstract: An information search system or an intellectual property information search system that is capable of highly accurate information search is provided. The intellectual property information search system includes a processing unit. First data and first reference analysis data are input to the processing unit. The first data includes first intellectual property information. The first reference analysis data includes plural pieces of second intellectual property information. The processing unit is configured to search the first reference analysis data for data similar to the first data to generate second data. The processing unit is configured to output the second data. The second data includes a piece of the second intellectual property information similar to the first intellectual property information and information showing the degree of similarity of the piece of the second intellectual property information to the first intellectual property information.
    Type: Application
    Filed: May 24, 2018
    Publication date: January 3, 2019
    Inventors: Shunpei YAMAZAKI, Yuji IWAKI, Hajime KIMURA, Yoshiaki OIKAWA, Natsuko TAKASE
  • Publication number: 20180374995
    Abstract: An object is to provide a highly reliable light emitting device which is thin and is not damaged by external local pressure. Further, another object is to manufacture a light emitting device with a high yield by preventing defects of a shape and characteristics due to external stress in a manufacture process. A light emitting element is sealed between a first structure body in which a fibrous body is impregnated with an organic resin and a second structure body in which a fibrous body is impregnated with an organic resin, whereby a highly reliable light emitting device which is thin and has intensity can be provided. Further, a light emitting device can be manufactured with a high yield by preventing defects of a shape and characteristics in a manufacture process.
    Type: Application
    Filed: September 4, 2018
    Publication date: December 27, 2018
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yoshiaki Oikawa, Shingo EGUCHI, Mitsuo MASHIYAMA, Masatoshi KATANIWA, Hironobu SHOJI, Masataka NAKADA, Satoshi SEO
  • Publication number: 20180331228
    Abstract: A change in electrical characteristics of a transistor including an oxide semiconductor film is suppressed.
    Type: Application
    Filed: November 10, 2016
    Publication date: November 15, 2018
    Inventors: Yoshiaki OIKAWA, Nobuharu OHSAWA, Masami JINTYOU, Yasutaka NAKAZAWA
  • Publication number: 20180315745
    Abstract: To solve a problem in that an antenna or a circuit including a thin film transistor is damaged due to discharge of electric charge accumulated in an insulator (a problem of electrostatic discharge), a semiconductor device includes a first insulator, a circuit including a thin film transistor provided over the first insulator, an antenna which is provided over the circuit and is electrically connected to the circuit, and a second insulator provided over the antenna, a first conductive film provided between the first insulator and the circuit, and a second conductive film provided between the second insulator and the antenna.
    Type: Application
    Filed: July 6, 2018
    Publication date: November 1, 2018
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yoshiaki Oikawa, Shingo Eguchi