Patents by Inventor Yoko Naito

Yoko Naito 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: 6443165
    Abstract: A method for use in a plasma treatment system that shortens the time required for the cleaning of a fluorine containing carbon film adheared in a vacuum vessel and protects the surface of a transfer table when the cleaning is carried out. After a CF film is deposited by, e.g., a plasma treatment system, the cleaning of the CF film adhered in a vacuum vessel 2 is carried out. In the cleaning, a plasma of O2 gas is produced, and the C—C and C—F bonds on the surface of the CF film are physically and chemically cut by the active species of O produced by the plasma. The O2 gas penetrates into the CF film at places where the C—C and C—F bonds have been cut, to react with C of the CF film to form CO2 which scatters. On the other hand, F scatters as F2. Thus, the CF film is removed.
    Type: Grant
    Filed: September 21, 1998
    Date of Patent: September 3, 2002
    Assignee: Tokyo Electron Limited
    Inventors: Takashi Akahori, Masaki Tozawa, Yoko Naito, Risa Nakase, Shuichi Ishizuka, Masahide Saito, Tadashi Hirata
  • Patent number: 6355902
    Abstract: Microwave is introduced into a plasma chamber of a plasma processing apparatus and magnetic field is applied thereto to allow plasma generation gas to be placed in plasma state by the electron cyclotron resonance. This plasma is introduced into a film forming chamber of the plasma processing apparatus to allow film forming gas including compound gas of carbon and fluorine or compound gas of carbon, fluorine and hydrogen, and hydro carbon gas to be placed in plasma state. In addition, an insulating film consisting of fluorine added carbon film is formed by the film forming gas placed in plasma state.
    Type: Grant
    Filed: January 2, 2001
    Date of Patent: March 12, 2002
    Assignee: Tokyo Electron Limited
    Inventors: Takashi Akahori, Masaki Tozawa, Yoko Naito, Risa Nakase, Osamu Yokoyama, Shuichi Ishizuka, Shunichi Endo, Masahide Saito, Takeshi Aoki, Tadashi Hirata
  • Patent number: 6333269
    Abstract: It is an object to enhance the degree of freedom for the shape of an obtained magnetic field to enhance the inplane uniformity of thickness of first and second films when the first and second films are continuously formed on a substrate to be treated. A main electromagnetic coil 5 is provided outside of a plasma chamber 21 so as to be movable vertically by a lifting shaft 52.
    Type: Grant
    Filed: September 14, 1998
    Date of Patent: December 25, 2001
    Assignee: Tokyo Electron Limited
    Inventors: Yoko Naito, Hideaki Amano
  • Publication number: 20010020608
    Abstract: Microwave is introduced into a plasma chamber of a plasma processing apparatus and magnetic field is applied thereto to allow plasma generation gas to be placed in plasma state by the electron cyclotron resonance. This plasma is introduced into a film forming chamber of the plasma processing apparatus to allow film forming gas including compound gas of carbon and fluorine or compound gas of carbon, fluorine and hydrogen, and hydro carbon gas to be placed in plasma state. In addition, an insulating film consisting of fluorine added carbon film is formed by the film forming gas placed in plasma state.
    Type: Application
    Filed: January 2, 2001
    Publication date: September 13, 2001
    Inventors: Takashi Akahori, Masaki Tozawa, Yoko Naito, Risa Nakase, Osamu Yokoyama, Shuichi Ishizuka, Shunichi Endo, Masahide Saito, Takeshi Aoki, Tadashi Hirata
  • Publication number: 20010008798
    Abstract: It is an object to enhance the degree of freedom for the shape of an obtained magnetic field to enhance the inplane uniformity of thickness of first and second films when the first and second films are continuously formed on a substrate to be treated.
    Type: Application
    Filed: September 14, 1998
    Publication date: July 19, 2001
    Inventors: YOKO NAITO, HIDEAKI AMANO
  • Patent number: 6218299
    Abstract: For example, in a plasma processing system, C4F8 gas and C2H4 gas are introduced as film-forming gases at flow rates of 60 sccm and 30 sccm, respectively, under the conditions of a pressure of 0.2 Pa, a microwave power of 2.7 kW, a radiofrequency power of 1.5 kW, and a wafer temperature of 350° C. At the same time, a plasma gas is also introduced at a flow rate of 150 sccm to form CF film 13 having an F content of, for example, 22% on silicon substrate 11. This CF film 13 has a relative dielectric constant of 2.4.
    Type: Grant
    Filed: July 6, 1998
    Date of Patent: April 17, 2001
    Assignee: Tokyo Electron Limited
    Inventors: Takashi Akahori, Yoko Naito, Shunichi Endo, Masahide Saito, Takeshi Aoki, Tadashi Hirata
  • Patent number: 6215087
    Abstract: Microwave is introduced into a plasma chamber of a plasma processing apparatus and magnetic field is applied thereto to allow plasma generation gas to be placed in plasma state by the electron cyclotron resonance. This plasma is introduced into a film forming chamber of the plasma processing apparatus to allow film forming gas including compound gas of carbon and fluorine or compound gas of carbon, fluorine and hydrogen, and hydro carbon gas to be placed in plasma state. In addition, an insulating film consisting of fluorine added carbon film is formed by the film forming gas placed in plasma state.
    Type: Grant
    Filed: July 10, 1998
    Date of Patent: April 10, 2001
    Assignee: Tokyo Electron Limited
    Inventors: Takashi Akahori, Masaki Tozawa, Yoko Naito, Risa Nakase, Osamu Yokoyama, Shuichi Ishizuka, Shunichi Endo, Masahide Saito, Takeshi Aoki, Tadashi Hirata