Patents by Inventor Nobutoshi Arai

Nobutoshi Arai 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).

  • Publication number: 20060154432
    Abstract: A resistance-changing function body includes an object made of a first substance and interposed between a first electrode and a second electrode, and a plurality of particles made of a second substance and arranged within the object so that an electrical resistance between the first electrode and the second electrode is changed before and after application of a specified voltage to between the first electrode and the second electrode. The first substance makes an electrical barrier against the second substance. With this constitution, by applying a specified voltage to between the first electrode and the second electrode, the electrical resistance can be changed depending on a state of the particles made of the second substance. Also, by virtue of a simple structure, a resistance-changing function body of small size is provided with low cost.
    Type: Application
    Filed: September 18, 2003
    Publication date: July 13, 2006
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Nobutoshi Arai, Hiroshi Iwata, Seizo Kakimoto
  • Patent number: 7074676
    Abstract: A memory film operable at a low voltage and a method of manufacturing the memory film; the method, comprising the steps of forming a first insulation film (112) on a semiconductor substrate (111) forming a first electrode, forming a first conductor film (113) on the first insulation film (112), forming a second insulation film (112B) on the surface of the first conductor film (113), forming a third insulation film containing conductor particulates (114, 115) on the second insulation film (112B), and forming a second conductor film forming a second electrode on the third insulation film.
    Type: Grant
    Filed: February 13, 2002
    Date of Patent: July 11, 2006
    Assignees: Sharp Kabushiki Kaisha
    Inventors: Hiroshi Iwata, Akihide Shibata, Nobutoshi Arai, Takayuki Ogura, Kouichirou Adachi, Seizo Kakimoto, Yukio Yasuda, Shigeaki Zaima, Akira Sakai
  • Patent number: 7030456
    Abstract: A memory function body 113, which includes a plurality of silver particles 103 covered with silver oxide 104, is interposed between a first electrode 300 and a second electrode 411. A magnitude of a current through the memory function body 113 changes on applying a prescribed voltage between the first electrode 300 and the second electrode 411, and a storage state is discriminated according to the magnitude of the current. The silver particles 103, which capture electric charges, are covered with the silver oxide 104 that serves as a barrier against the passage of electric charges, and therefore, the memory function body 113 can stably retain electric charges at the normal temperature.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: April 18, 2006
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Nobutoshi Arai, Hiroshi Iwata, Seizo Kakimoto
  • Publication number: 20050151127
    Abstract: A variable resistance functional body has an insulator interposed between a first electrode and a second electrode and interposed between a third electrode and a fourth electrode. The insulator contains a plurality of conductive particles. The conductive particles are formed by implanting a substance for forming the conductive particles into the insulator by the negative ion implantation method. The conductive particles are provided so that an electrical resistance between the third electrode and the fourth electrode changes on the basis of a size effect or a change in size between before and after application of a prescribed voltage across the first electrode and the second electrode.
    Type: Application
    Filed: August 26, 2004
    Publication date: July 14, 2005
    Inventors: Hiroshi Iwata, Nobutoshi Arai
  • Publication number: 20040183647
    Abstract: A memory function body 113, which includes a plurality of silver particles 103 covered with silver oxide 104, is interposed between a first electrode 300 and a second electrode 411. A magnitude of a current through the memory function body 113 changes on applying a prescribed voltage between the first electrode 300 and the second electrode 411, and a storage state is discriminated according to the magnitude of the current. The silver particles 103, which capture electric charges, are covered with the silver oxide 104 that serves as a barrier against the passage of electric charges, and therefore, the memory function body 113 can stably retain electric charges at the normal temperature.
    Type: Application
    Filed: March 11, 2004
    Publication date: September 23, 2004
    Inventors: Nobutoshi Arai, Hiroshi Iwata, Seizo Kakimoto
  • Publication number: 20040180491
    Abstract: A memory function body has a medium interposed between a first conductor (e.g., a conductive substrate) and a second conductor (e.g., an electrode) and consisting of a first material (e.g., silicon oxide or silicon nitride). The medium contains particles. Each particle is covered with a second material (e.g., silver oxide) and formed of a third material (e.g., silver). The second material functions as a barrier against passage of electric charges, and the third material has a function of retaining electric charges. The third material is introduced into the medium by, for example, a negative ion implantation method.
    Type: Application
    Filed: March 11, 2004
    Publication date: September 16, 2004
    Inventors: Nobutoshi Arai, Hiroshi Iwata, Seizo Kakimoto
  • Publication number: 20040115883
    Abstract: A memory film operable at a low voltage and a method of manufacturing the memory film; the method, comprising the steps of forming a first insulation film (112) on a semiconductor substrate (111) forming a first electrode, forming a first conductor film (113) on the first insulation film (112), forming a second insulation film (112B) on the surface of the first conductor film (113), forming a third insulation film containing conductor particulates (114, 115) on the second insulation film (112B), and forming a second conductor film forming a second electrode on the third insulation film.
    Type: Application
    Filed: February 6, 2004
    Publication date: June 17, 2004
    Inventors: Hiroshi Iwata, Akihide Shibata, Nobutoshi Arai, Takayuki Ogura, Kouichirou Adachi, Seizo Kakimoto, Yukio Yasuda, Shigeaki Zaima, Akira Sakai