Patents by Inventor Mikiko Takada

Mikiko Takada 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: 11876137
    Abstract: To provide a field-effect transistor, containing: a substrate; a protective layer; a gate insulating layer formed between the substrate and the protective layer; a source electrode and a drain electrode, which are formed to be in contact with the gate insulating layer; a semiconductor layer, which is formed at least between the source electrode and the drain electrode, and is in contact with the gate insulating layer, the source electrode, and the drain electrode; and a gate electrode, which is formed at an opposite side to the side where the semiconductor layer is provided, with the gate insulating layer being between the gate electrode and the semiconductor layer, and is in contact with the gate insulating layer, wherein the protective layer contains a metal oxide composite, which contains at least Si and alkaline earth metal.
    Type: Grant
    Filed: November 13, 2019
    Date of Patent: January 16, 2024
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yuji Sone, Naoyuki Ueda, Yuki Nakamura, Mikiko Takada, Shinji Matsumoto, Ryoichi Saotome, Sadanori Arae, Yukiko Abe
  • Publication number: 20220258517
    Abstract: A printed matter producing method includes forming an intermediate layer over a base material; applying an ink receiving layer forming liquid to the intermediate layer to form an ink receiving layer; and applying an ink to the ink receiving layer by an inkjet method to form an image. The viscosity of the ink receiving layer forming liquid at 25 degrees C. is 40 mPa·s or higher.
    Type: Application
    Filed: June 1, 2020
    Publication date: August 18, 2022
    Applicant: Ricoh Company, Ltd.
    Inventors: Yuuma Usui, Mikiko Takada, Yukio Fujiwara
  • Publication number: 20210138818
    Abstract: Provided is printed matter producing method including: forming a foamable layer containing a foaming agent; applying a defoaming agent to a predetermined region of the foamable layer to bring the defoaming agent into contact with the foamable layer; forming an ink receiving layer over the foamable layer to which the defoaming agent is applied; acquiring image data and shape data representing a shape of a bossed-recessed region of the foamable layer after foamed, and generating print data assigning a greater amount of an ink to a portion in the image data corresponding to an inclined portion of the bossed-recessed region based on the shape data; applying an ink over the ink receiving layer based on the print data to form an image; and applying energy to the foamable layer to form bosses and recesses.
    Type: Application
    Filed: October 26, 2020
    Publication date: May 13, 2021
    Inventors: Yuuma USUI, Yukio FUJIWARA, Mikiko TAKADA
  • Publication number: 20210129566
    Abstract: Provided is a printed matter producing method including: a foamable layer forming step of forming a foamable layer containing a foaming agent, an ink receiving layer forming step of forming an ink receiving layer containing a polymer of a polymerizable compound a over the foamable layer, an image forming step of applying an ink containing a colorant and a polymerizable compound b over the ink receiving layer to form an image, and a foaming step of heating the foamable layer to foam the foamable layer.
    Type: Application
    Filed: October 13, 2020
    Publication date: May 6, 2021
    Inventors: Yuuma USUI, Masakazu YOSHIDA, Yukio FUJIWARA, Mikiko TAKADA
  • Publication number: 20210129524
    Abstract: Provided is a printed matter producing method including: a volume expansion layer forming step of forming a volume expansion layer containing a volume expansion agent; a volume expansion suppressor applying step of applying and contacting a volume expansion suppressor containing a multifunctional monomer to the volume expansion layer while increasing an amount of the multifunctional monomer to be applied to a predetermined region of the volume expansion layer in accordance with a degree of suppressing volume expansion of the predetermined region of the volume expansion layer; and a volume expanding step of heating the volume expansion layer after the volume expansion suppressor applying step to volume-expand the volume expansion layer.
    Type: Application
    Filed: October 26, 2020
    Publication date: May 6, 2021
    Inventors: Yukio FUJIWARA, Yuuma USUI, Mikiko TAKADA, Masakazu YOSHIDA, Takuma NAKAMURA, Itsuki KAN
  • Patent number: 10923569
    Abstract: A p-type oxide which is amorphous and is represented by the following compositional formula: xAO.yCu2O where x denotes a proportion by mole of AO and y denotes a proportion by mole of Cu2O and x and y satisfy the following expressions: 0?x<100 and x+y=100, and A is any one of Mg, Ca, Sr and Ba, or a mixture containing at least one selected from the group consisting of Mg, Ca, Sr and Ba.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: February 16, 2021
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yukiko Abe, Naoyuki Ueda, Yuki Nakamura, Shinji Matsumoto, Yuji Sone, Mikiko Takada, Ryoichi Saotome
  • Patent number: 10672914
    Abstract: To provide a field-effect transistor, containing: a gate electrode configured to apply gate voltage; a source electrode and a drain electrode, both of which are configured to take out electric current; an active layer formed of a n-type oxide semiconductor, provided in contact with the source electrode and the drain electrode; and a gate insulating layer provided between the gate electrode and the active layer, wherein work function of the source electrode and drain electrode is 4.90 eV or greater, and wherein an electron carrier density of the n-type oxide semiconductor is 4.0×1017 cm?3 or greater.
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: June 2, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinji Matsumoto, Naoyuki Ueda, Yuki Nakamura, Mikiko Takada, Yuji Sone, Ryoichi Saotome, Sadanori Arae, Yukiko Abe
  • Publication number: 20200083383
    Abstract: To provide a field-effect transistor, containing: a substrate; a protective layer; a gate insulating layer formed between the substrate and the protective layer; a source electrode and a drain electrode, which are formed to be in contact with the gate insulating layer; a semiconductor layer, which is formed at least between the source electrode and the drain electrode, and is in contact with the gate insulating layer, the source electrode, and the drain electrode; and a gate electrode, which is formed at an opposite side to the side where the semiconductor layer is provided, with the gate insulating layer being between the gate electrode and the semiconductor layer, and is in contact with the gate insulating layer, wherein the protective layer contains a metal oxide composite, which contains at least Si and alkaline earth metal.
    Type: Application
    Filed: November 13, 2019
    Publication date: March 12, 2020
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yuji SONE, Naoyuki UEDA, Yuki NAKAMURA, Mikiko TAKADA, Shinji MATSUMOTO, Ryoichi SAOTOME, Sadanori ARAE, Yukiko ABE
  • Patent number: 10505046
    Abstract: To provide a field-effect transistor, containing: a substrate; a protective layer; a gate insulating layer formed between the substrate and the protective layer; a source electrode and a drain electrode, which are formed to be in contact with the gate insulating layer; a semiconductor layer, which is formed at least between the source electrode and the drain electrode, and is in contact with the gate insulating layer, the source electrode, and the drain electrode; and a gate electrode, which is formed at an opposite side to the side where the semiconductor layer is provided, with the gate insulating layer being between the gate electrode and the semiconductor layer, and is in contact with the gate insulating layer, wherein the protective layer contains a metal oxide composite, which contains at least Si and alkaline earth metal.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: December 10, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yuji Sone, Naoyuki Ueda, Yuki Nakamura, Mikiko Takada, Shinji Matsumoto, Ryoichi Saotome, Sadanori Arae, Yukiko Abe
  • Publication number: 20190172914
    Abstract: A p-type oxide which is amorphous and is represented by the following compositional formula: xAO.yCu2O where x denotes a proportion by mole of AO and y denotes a proportion by mole of Cu2O and x and y satisfy the following expressions: 0?x<100 and x+y=100, and A is any one of Mg, Ca, Sr and Ba, or a mixture containing at least one selected from the group consisting of Mg, Ca, Sr and Ba.
    Type: Application
    Filed: January 28, 2019
    Publication date: June 6, 2019
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yukiko ABE, Naoyuki UEDA, Yuki NAKAMURA, Shinji MATSUMOTO, Yuji SONE, Mikiko TAKADA, Ryoichi SAOTOME
  • Patent number: 10236349
    Abstract: A p-type oxide which is amorphous and is represented by the following compositional formula: xAO.yCu2O where x denotes a proportion by mole of AO and y denotes a proportion by mole of Cu2O and x and y satisfy the following expressions: 0?x<100 and x+y=100, and A is any one of Mg, Ca, Sr and Ba, or a mixture containing at least one selected from the group consisting of Mg, Ca, Sr and Ba.
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: March 19, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yukiko Abe, Naoyuki Ueda, Yuki Nakamura, Shinji Matsumoto, Yuji Sone, Mikiko Takada, Ryoichi Saotome
  • Patent number: 9978877
    Abstract: To provide an electroconductive thin film, containing: a metal oxide containing indium and tin; and gold.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: May 22, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventors: Shinji Matsumoto, Naoyuki Ueda, Yuki Nakamura, Yukiko Abe, Mikiko Takada, Yuji Sone, Ryoichi Saotome
  • Publication number: 20170345901
    Abstract: A p-type oxide which is amorphous and is represented by the following compositional formula: xAO.yCu2O where x denotes a proportion by mole of AO and y denotes a proportion by mole of Cu2O and x and y satisfy the following expressions: 0?x<100 and x+y=100, and A is any one of Mg, Ca, Sr and Ba, or a mixture containing at least one selected from the group consisting of Mg, Ca, Sr and Ba.
    Type: Application
    Filed: August 14, 2017
    Publication date: November 30, 2017
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yukiko ABE, Naoyuki UEDA, Yuki NAKAMURA, Shinji MATSUMOTO, Yuji SONE, Mikiko TAKADA, Ryoichi SAOTOME
  • Patent number: 9761673
    Abstract: A p-type oxide which is amorphous and is represented by the following compositional formula: xAO.yCu2O where x denotes a proportion by mole of AO and y denotes a proportion by mole of Cu2O and x and y satisfy the following expressions: 0?x<100 and x+y=100, and A is any one of Mg, Ca, Sr and Ba, or a mixture containing at least one selected from the group consisting of Mg, Ca, Sr and Ba.
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: September 12, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yukiko Abe, Naoyuki Ueda, Yuki Nakamura, Shinji Matsumoto, Yuji Sone, Mikiko Takada, Ryoichi Saotome
  • Patent number: 9748097
    Abstract: To provide a coating liquid for forming a metal oxide film, containing: an indium compound; at least one selected from the group consisting of a magnesium compound, a calcium compound, a strontium compound, and a barium compound; at least one selected from the group consisting of a compound containing a metal a maximum positive value of an oxidation number of which is IV, a compound containing a metal a maximum positive value of an oxidation number of which is V, and a compound containing a metal a maximum positive value of an oxidation number of which is VI; and an organic solvent.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: August 29, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yuki Nakamura, Naoyuki Ueda, Shinji Matsumoto, Mikiko Takada, Yuji Sone, Ryoichi Saotome, Sadanori Arae, Yukiko Abe
  • Patent number: 9536957
    Abstract: To provide is a p-type oxide, including an oxide, wherein the oxide includes: Cu; and an element M, which is selected from p-block elements, and which can be in an equilibrium state, as being present as an ion, wherein the equilibrium state is a state in which there are both a state where all of electrons of p-orbital of an outermost shell are lost, and a state where all of electrons of an outermost shell are lost, and wherein the p-type oxide is amorphous.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: January 3, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yukiko Abe, Naoyuki Ueda, Yuki Nakamura, Mikiko Takada, Shinji Matsumoto, Yuji Sone, Ryoichi Saotome
  • Patent number: 9481173
    Abstract: A nozzle plate having a nozzle hole that penetrates through the nozzle plate in a thickness direction is disclosed. The nozzle plate includes a discharge outlet that is formed at the nozzle hole, and provided curvatures of four corner portions of an opening shape of the discharge outlet are denoted as R1, R2, R3, and R4, the opening shape of the discharge outlet is configured to approximate the equation R1=R2?R3=R4?0.
    Type: Grant
    Filed: July 19, 2013
    Date of Patent: November 1, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Naoyuki Ueda, Yuki Nakamura, Yukiko Abe, Shinji Matsumoto, Yuji Sone, Mikiko Takada, Ryoichi Saotome
  • Patent number: 9418842
    Abstract: A coating liquid for forming a metal oxide thin film includes: an inorganic indium compound; an inorganic calcium compound or an inorganic strontium compound, or both thereof; and an organic solvent.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: August 16, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yuki Nakamura, Naoyuki Ueda, Yukiko Abe, Yuji Sone, Shinji Matsumoto, Mikiko Takada, Ryoichi Saotome
  • Publication number: 20160190329
    Abstract: To provide a field-effect transistor, containing: a gate electrode configured to apply gate voltage; a source electrode and a drain electrode, both of which are configured to take out electric current; an active layer formed of a n-type oxide semiconductor, provided in contact with the source electrode and the drain electrode; and a gate insulating layer provided between the gate electrode and the active layer, wherein work function of the source electrode and drain electrode is 4.90 eV or greater, and wherein an electron carrier density of the n-type oxide semiconductor is 4.0×1017 cm?3 or greater.
    Type: Application
    Filed: July 25, 2014
    Publication date: June 30, 2016
    Applicant: RICOH COMPANY, LTD.
    Inventors: Shinji MATSUMOTO, Naoyuki UEDA, Yuki NAKAMURA, Mikiko TAKADA, Yuji SONE, Ryoichi SAOTOME, Sadanori ARAE, Yukiko ABE
  • Publication number: 20160042947
    Abstract: To provide a coating liquid for forming a metal oxide film, containing: an indium compound; at least one selected from the group consisting of a magnesium compound, a calcium compound, a strontium compound, and a barium compound; at least one selected from the group consisting of a compound containing a metal a maximum positive value of an oxidation number of which is IV, a compound containing a metal a maximum positive value of an oxidation number of which is V, and a compound containing a metal a maximum positive value of an oxidation number of which is VI; and an organic solvent.
    Type: Application
    Filed: March 26, 2014
    Publication date: February 11, 2016
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yuki NAKAMURA, Naoyuki UEDA, Shinji MATSUMOTO, Mikiko TAKADA, Yuji SONE, Ryoichi SAOTOME, Sadanori ARAE, Yukiko ABE