Patents by Inventor Toshio Nakanishi

Toshio Nakanishi 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: 7429539
    Abstract: A substrate processing method comprises the step of forming an oxide film on a silicon substrate surface, and introducing nitrogen atoms into the oxide film by exposing the oxide film to nitrogen radicals excited in plasma formed by a microwave introduced via a planar antenna.
    Type: Grant
    Filed: December 26, 2006
    Date of Patent: September 30, 2008
    Assignee: Tokyo Electron Limited
    Inventors: Seiji Matsuyama, Takuya Sugawara, Shigenori Ozaki, Toshio Nakanishi, Masaru Sasaki
  • Publication number: 20080214017
    Abstract: A gate insulation film (104) of a MISFET (100) is constituted of a silicon oxide film (106), silicon nitride film (107), and high-permittivity film (108). The silicon oxide film (106) and silicon nitride film (107) are formed by microwave plasma processing with a radial line slot antenna.
    Type: Application
    Filed: December 31, 2007
    Publication date: September 4, 2008
    Applicant: Tokyo Electron Limited
    Inventors: Shigemi Murakawa, Toshikazu Kumai, Toshio Nakanishi
  • Patent number: 7374635
    Abstract: A gate insulation film (104) of a MISFET (100) is constituted of a silicon oxide film (106), silicon nitride film (107), and high-permittivity film (108). The silicon oxide film (106) and silicon nitride film (107) are formed by microwave plasma processing with a radial line slot antenna.
    Type: Grant
    Filed: December 11, 2006
    Date of Patent: May 20, 2008
    Assignee: Tokyo Electron Limited
    Inventors: Shigemi Murakawa, Toshikazu Kumai, Toshio Nakanishi
  • Publication number: 20070290247
    Abstract: In the present invention, when a gate insulation film in a DRAM is formed, an oxide film constituting a base of the gate insulation film is plasma-nitrided. The plasma nitridation is performed with microwave plasma generated by using a plane antenna having a large number of through holes. Nitrogen concentration in the gate insulation film formed by the plasma nitridation is 5 to 20% in atomic percentage. Even without subsequent annealing, it is possible to effectively prevent a boron penetration phenomenon in the DRAM and to reduce traps in the film causing deterioration in driving capability of the device.
    Type: Application
    Filed: October 27, 2005
    Publication date: December 20, 2007
    Inventors: Tatsuo Nishita, Shuuichi Ishizuka, Yutaka Fujino, Toshio Nakanishi, Yoshihiro Sato
  • Publication number: 20070224837
    Abstract: A process for producing electronic device (for example, high-performance MOS-type semiconductor device) structure having a good electric characteristic, wherein an SiO2 film or SiON film is used as an insulating film having an extremely thin (2.5 nm or less, for example) film thickness, and poly-silicon, amorphous-silicon, or SiGe is used as an electrode. In the presence of process gas comprising oxygen and an inert gas, plasma including oxygen and the inert gas (or plasma comprising nitrogen and an inert gas, or plasma comprising nitrogen, an inert gas and hydrogen) is generated by irradiating a wafer W including Si as a main component with microwave via a plane antenna member SPA. An oxide film (or oxynitride film) is formed on the wafer surface by using the thus generated plasma, and as desired, an electrode of poly-silicon, amorphous-silicon, or SiGe is formed, to thereby form an electronic device structure.
    Type: Application
    Filed: January 26, 2007
    Publication date: September 27, 2007
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Takuya Sugawara, Toshio Nakanishi, Shigenori Ozaki, Seiji Matsuyama, Shigemi Murakawa, Yoshihide Tada
  • Publication number: 20070218687
    Abstract: A process for producing an electronic device material of a high quality MOS-type semiconductor comprising an insulating layer and a semiconductor layer excellent in the electrical characteristic. The process includes: a step of CVD-treating a substrate to be processed comprising single-crystal silicon as a main component, to thereby form an insulating layer; and a step of exposing the substrate to be processed to a plasma which has been generated from a process gas on the basis of microwave irradiation via a plane antenna member having a plurality of slots, to thereby modify the insulating film by using the thus generated plasma.
    Type: Application
    Filed: May 9, 2007
    Publication date: September 20, 2007
    Applicant: Tokyo Electron Limited
    Inventors: Takuya Sugawara, Toshio Nakanishi, Shigenori Ozaki, Seiji Matsuyama, Shigemi Murakawa, Yoshihide Tada
  • Publication number: 20070204959
    Abstract: A method of processing a for an electronic device, comprising, at least: a nitridation step (a) of supplying nitrogen radicals on the surface of the electronic device substrate, to thereby form a nitride film on the surface thereof; and a hydrogenation step (b) of supplying hydrogen radicals to the surface of the electronic device substrate. By use of this method, it is possible to recover the degradation in the electric property of an insulating film due to a turnaround phenomenon which can occur at the time of nitriding an Si substrate, etc.
    Type: Application
    Filed: May 11, 2007
    Publication date: September 6, 2007
    Applicant: TOKYO ELECTRON LTD.
    Inventors: Toshio NAKANISHI, Takuya Sugawara, Seiji Matsuyama, Masaru Sasaki
  • Patent number: 7250375
    Abstract: A method of processing a for an electronic device, comprising, at least: a nitridation step (a) of supplying nitrogen radicals on the surface of the electronic device substrate, to thereby form a nitride film on the surface thereof; and a hydrogenation step (b) of supplying hydrogen radicals to the surface of the electronic device substrate. By use of this method, it is possible to recover the degradation in the electric property of an insulating film due to a turnaround phenomenon which can occur at the time of nitriding an Si substrate, etc.
    Type: Grant
    Filed: August 2, 2002
    Date of Patent: July 31, 2007
    Assignee: Tokyo Electron Limited
    Inventors: Toshio Nakanishi, Takuya Sugawara, Seiji Matsuyama, Masaru Sasaki
  • Patent number: 7232772
    Abstract: A substrate processing method comprises the step of forming an oxide film on a silicon substrate surface, and introducing nitrogen atoms into the oxide film by exposing the oxide film to nitrogen radicals excited in plasma formed by a microwave introduced via a planar antenna.
    Type: Grant
    Filed: November 16, 2004
    Date of Patent: June 19, 2007
    Assignee: Tokyo Electron Limited
    Inventors: Seiji Matsuyama, Takuya Sugawara, Shigenori Ozaki, Toshio Nakanishi, Masaru Sasaki
  • Publication number: 20070134895
    Abstract: A substrate processing method comprises the step of forming an oxide film on a silicon substrate surface, and introducing nitrogen atoms into the oxide film by exposing the oxide film to nitrogen radicals excited in plasma formed by a microwave introduced via a planar antenna.
    Type: Application
    Filed: December 26, 2006
    Publication date: June 14, 2007
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Seijii Matsuyama, Takuya Sugawara, Shigenori Ozaki, Toshio Nakanishi, Masaru Sasaki
  • Patent number: 7226874
    Abstract: A substrate processing method forming an oxynitride film by nitriding an oxide film formed on a silicon substrate includes a nitridation processing step that nitrides a surface of the oxide film by radicals or ions formed by exciting a nitrogen gas by microwave-excited plasma, the nitridation processing is conducted at a substrate temperature of 500° C. or less by setting an electron temperature of the microwave-excited plasma to 2 eV or less, and by setting the resident time of oxygen in the processing space in which the substrate to be processed is held, to two seconds or less.
    Type: Grant
    Filed: November 12, 2004
    Date of Patent: June 5, 2007
    Assignee: Tokyo Electron Limited
    Inventors: Seiji Matsuyama, Takuya Sugawara, Shigenori Ozaki, Toshio Nakanishi, Masaru Sasaki
  • Patent number: 7217659
    Abstract: A process for producing an electronic device material of a high quality MOS-type semiconductor having an insulating layer and a semiconducting layer. The process includes a step of CVD-treating a substrate to be processed having single-crystal silicon as a main component to thereby form an insulating layer, and a step of exposing the substrate to be processed to a plasma which has been generated from a process gas on the basis of microwave irradiation via a plane antenna member having a plurality of slots to thereby modify the insulating film by using the thus generated plasma.
    Type: Grant
    Filed: March 2, 2005
    Date of Patent: May 15, 2007
    Assignee: Tokyo Electron Limited
    Inventors: Takuya Sugawara, Toshio Nakanishi, Shigenori Ozaki, Seiji Matsuyama, Shigemi Murakawa, Yoshihide Tada
  • Publication number: 20070085154
    Abstract: A gate insulation film (104) of a MISFET (100) is constituted of a silicon oxide film (106), silicon nitride film (107), and high-permittivity film (108). The silicon oxide film (106) and silicon nitride film (107) are formed by microwave plasma processing with a radial line slot antenna.
    Type: Application
    Filed: December 11, 2006
    Publication date: April 19, 2007
    Applicant: Tokyo Electron Limited
    Inventors: Shigemi Murakawa, Toshikazu Kumai, Toshio Nakanishi
  • Publication number: 20070059944
    Abstract: According to the present invention, when a nitridation process by plasma generated by a microwave is applied to a substrate with an oxide film having been formed thereon to form an oxynitride film, the microwave is intermittently supplied. By the intermittent supply of the microwave, ion bombardment is reduced in accordance with a decrease in electron temperature, and a diffusion velocity of nitride species in the oxide film lowers, which as a result makes it possible to prevent nitrogen from concentrating in a substrate-side interface of an oxynitride film to increase the nitrogen concentration therein. Consequently, it is possible to improve quality of the oxynitride film, resulting in a reduced leakage current, an improved operating speed, and improved NBTI resistance.
    Type: Application
    Filed: September 1, 2006
    Publication date: March 15, 2007
    Applicant: Tokyo Electron Limited
    Inventors: Seiji Matsuyama, Toshio Nakanishi, Shigenori Ozaki, Hikaru Adachi, Koichi Takatsuki, Yoshihiro Sato
  • Patent number: 7166185
    Abstract: The silicon oxide film (106) and silicon nitride film (107) are formed by microwave plasma processing with a radial line slot antenna.
    Type: Grant
    Filed: August 29, 2002
    Date of Patent: January 23, 2007
    Assignee: Tokyo Electron Limited
    Inventors: Shigemi Murakawa, Toshikazu Kumai, Toshio Nakanishi
  • Publication number: 20060269694
    Abstract: A plasma processing method for forming a silicon nitride film is provided. A nitrogen-containing plasma is used to nitride silicon on a surface of a target object in a processing chamber of a plasma processing apparatus. The plasma processing method includes a first step of performing a plasma processing under a condition wherein a nitriding reaction is mediated mainly through radical species of the nitrogen-containing plasma, and a second step of performing a plasma processing under a condition wherein the nitriding reaction is mediated mainly through ion species of the nitrogen-containing plasma.
    Type: Application
    Filed: May 30, 2006
    Publication date: November 30, 2006
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Minoru Honda, Toshio Nakanishi
  • Publication number: 20060199398
    Abstract: An insulting film is modified by subjecting the insulting film to a modification treatment comprising a combination of a plasma treatment and a thermal annealing treatment. There is provided a method of enhancing the characteristic of an insulating film by improving deterioration in the characteristic of the insulating film due to carbon, a suboxide, a dangling bond or the like contained in the insulating film.
    Type: Application
    Filed: November 30, 2005
    Publication date: September 7, 2006
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Takuya Sugawara, Yoshihide Tada, Genji Nakamura, Shigenori Ozaki, Toshio Nakanishi, Masaru Sasaki, Seiji Matsuyama, Kazuhide Hasebe, Shigeru Nakajima, Tomonori Fujiwara
  • Publication number: 20060156984
    Abstract: To enable suitable plasma processing with reduced damage to a processing target ascribable to plasma generation. In a plasma processing apparatus including at least: a plasma processing chamber in which plasma processing is applied to a processing target; a processing target supporting means for setting the processing target in the plasma processing chamber; and a plasma generating means for generating a plasma in the plasma processing chamber, the present invention uses the plasma generating means that is capable of supplying intermittent energy.
    Type: Application
    Filed: November 29, 2005
    Publication date: July 20, 2006
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Toshihisa Nozawa, Kiyotaka Ishibashi, Toshio Nakanishi
  • Patent number: 7053515
    Abstract: The present invention provides a rotor for a rotary electric machine that suppresses the occurrence of winding disturbances in the process of winding a coil wire and has a coil field having a uniform outside diameter that is less likely to collapse. A coil field of a rotor coil is constructed by winding a coil wire having a circular cross section onto an outer circumference of a drum portion of a bobbin in multiple layers so as to make columns in each of the layers equal in number in an axial direction.
    Type: Grant
    Filed: October 22, 2002
    Date of Patent: May 30, 2006
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Toshio Nakanishi, Masashi Ono, Takushi Takizawa, Atsushi Oohashi, Katsunori Tanaka
  • Publication number: 20060024864
    Abstract: A substrate processing method includes a first step of exposing a silicon substrate surface to mixed gas plasma of an inert gas and hydrogen, and a second step of conducting any of oxidation processing, nitridation processing and oxynitridation processing to said silicon substrate surface by plasma processing after said first step, wherein an organic substance remaining on said substrate surface is removed in said first step.
    Type: Application
    Filed: August 26, 2005
    Publication date: February 2, 2006
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Toshio Nakanishi, Shigenori Ozaki, Masaru Sasaki