Patents by Inventor Toshihisa Nozawa

Toshihisa Nozawa 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: 8173928
    Abstract: In a processing apparatus for performing a specified process on a target object at a predetermined process pressure, the apparatus includes an evacuable processing chamber having a gas exhaust port formed in a bottom portion thereof; a mounting table provided within the processing chamber for holding the target object; a pressure control valve connected to the gas exhaust port, the pressure control valve including a slide-type valve body for changing an area of an opening region of a valve port; and a gas exhaust system connected to the pressure control valve. The pressure control valve is eccentrically arranged such that a center axis of the mounting table lies within an opening region of the pressure control valve formed over a practical use region of a valve opening degree of the pressure control valve.
    Type: Grant
    Filed: March 5, 2007
    Date of Patent: May 8, 2012
    Assignee: Tokyo Electron Limited
    Inventors: Toshihisa Nozawa, Tamaki Yuasa
  • Patent number: 8158012
    Abstract: A film forming apparatus is provided with a processing chamber having a substrate holding table for holding a substrate to be processed inside the container; a gas material generation unit arranged outside the processing chamber, for generating a gas material by evaporating or sublimating a film forming source material including a metal; a gas material supply unit for supplying the processing chamber with the gas material; and a transport path for transporting the gas material to the gas material supply unit from the gas material generation unit. The film forming apparatus is characterized in that a metal-containing layer is formed on an organic layer including a light emitting layer on the target substrate.
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: April 17, 2012
    Assignee: Tokyo Electron Limited
    Inventors: Toshihisa Nozawa, Shingo Watanabe
  • Publication number: 20120064726
    Abstract: There is provided a plasma etching apparatus provided for performing an etching in a desirable shape. The plasma etching apparatus includes a processing chamber 12 for performing a plasma process on a target substrate W; a gas supply unit 13 for supplying a plasma processing gas into the processing chamber 12; a supporting table positioned within the processing chamber 12 and configured to support the target substrate thereon; a microwave generator 15 for generating a microwave for plasma excitation; a plasma generation unit for generating plasma within the processing chamber 12 by using the generated microwave; a pressure control unit for controlling a pressure within the processing chamber 12; a bias power supply unit for supplying AC bias power to the supporting table 14; and a control unit for controlling the AC bias power by alternately repeating supply and stop of the AC bias power.
    Type: Application
    Filed: September 14, 2011
    Publication date: March 15, 2012
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Toshihisa Nozawa, Masaru Sasaki, Jun Hashimoto, Shota Yoshimura, Toshihisa Ozu, Tetsuya Nishizuka
  • Patent number: 8124523
    Abstract: A method for fabricating a semiconductor device includes the steps of (a) forming a plasma of a gas having carbon and fluorine, and forming an internal insulation film provided with a fluorine-doped carbon film formed on a substrate using the plasma; (b) forming a metal film on the internal insulation film; (c) etching the metal film according to a pattern to form a hard mask; (d) forming a concave part in the fluorine-doped carbon film by etching the fluorine-doped carbon film using the hard mask; (e) forming a film formation of a wiring material on the substrate for filling the concave part with the wiring material; (f) removing an excess part of the wiring material and the hard mask on the fluorine-doped carbon film for exposing a surface of the fluorine-doped carbon film; and (g) removing an oxide formed on the surface of the fluorine-doped film.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: February 28, 2012
    Assignee: Tokyo Electron Limited
    Inventors: Kohei Kawamura, Toshihisa Nozawa, Takaaki Matsuoka
  • Patent number: 8123194
    Abstract: A disclosed on-off valve includes a valve body having two openings that may place a process chamber and an evacuation apparatus in pressure communication with each other; a closure element located inside the valve body and adapted to close one of the two openings; a seal member provided in the closure element and adapted to seal the one of the two openings when the closure element closes the one of the two openings; a linear motion driver that linearly moves the closure element; a retreat portion located away from the two openings; and a pivotal motion driver adapted to pivot the closure element between a first position corresponding to the one of the two openings and a second position corresponding to the retreat portion; wherein the closure element is moved to the retreat portion by the linear motion driver and the pivotal motion driver in order to stay at the retreat portion when the closure element is away from the one of the two openings.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: February 28, 2012
    Assignee: Tokyo Electron Limited
    Inventor: Toshihisa Nozawa
  • Patent number: 8110044
    Abstract: A first flow passage (16), which cools a temperature controlled object by a circulating first cooling water (15), and a second flow passage (19) separate from the first flow passage are provided so as to exchange heat between a second cooling water (18) flowing through the second flow passage (19) and the first cooling water (15). There is no need to store the first cooling water (15) in a tank of a constant capacity, and the first cooling water (15) flowing through the first flow passage (16) of a chiller corresponding part is absorbed substantially in its entirety by the second cooling water (18). A response becomes quick with respect to a load fluctuation of the temperature controlled object, and waste of energy can be reduced while improving accuracy of temperature control.
    Type: Grant
    Filed: March 5, 2004
    Date of Patent: February 7, 2012
    Assignee: Tokyo Electron Limited
    Inventors: Toshihisa Nozawa, Koji Kotani
  • Patent number: 8091863
    Abstract: A gate valve of a semiconductor manufacturing apparatus, which is formed between a processing chamber in which processing is performed and a transfer chamber which carries a substrate on which the processing is performed, includes a gate valve at a side of the processing chamber; a sealing member which is formed in the gate valve at the side of the processing chamber; a gate valve at the side of the transfer chamber; a sealing member which is formed in the gate valve at the side of the transfer chamber; and a thermal insulator which is formed between the gate valve at the side of the processing chamber and the gate valve at the side of the transfer chamber.
    Type: Grant
    Filed: March 10, 2009
    Date of Patent: January 10, 2012
    Assignee: Tokyo Electron Limited
    Inventors: Shinji Komoto, Toshihisa Nozawa
  • Publication number: 20110318919
    Abstract: A method for manufacturing semiconductor devices includes the steps of annealing an insulating layer and forming a barrier layer including a metal element over the insulating layer. The insulating layer includes a fluorocarbon (CFx) film. The barrier layer is formed by a high-temperature sputtering process after the annealing step.
    Type: Application
    Filed: January 22, 2010
    Publication date: December 29, 2011
    Applicant: Tokyo Electron Limited
    Inventors: Masahiro Horigome, Takuya Kurotori, Yasuo Kobayashi, Takaaki Matsuoka, Toshihisa Nozawa
  • Patent number: 8052887
    Abstract: When plasma processing is finished, a gate valve 13a is closed and cleaning gas is ejected from holes 121a of a shower plate 121, and at the same time, a microwave is generated from a microwave generator 101. Further, at this time, the inside of a process chamber 110 is exhausted through a second exhaust port 106. Since the exhaust is conducted through a second exhaust port 106 positioned lower than a wafer stage 104 in a lowered state when the inside of the process chamber 110 is cleaned, it is possible to more effectively remove gas and reaction products deposited especially in a lower portion of the process chamber 110.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: November 8, 2011
    Assignee: Tokyo Electron Limited
    Inventors: Toshihisa Nozawa, Tamaki Yuasa
  • Patent number: 8021975
    Abstract: A plasma processing method for forming a film on a substrate using a gas processed by a plasma. The plasma processing method for forming a film includes the steps of forming a CF film on the substrate by using a CaFb gas (here, a is a counting number, and b is a counting number which satisfies an equation of “b=2×a?2”), processing the CF film with the gas processed by the plasma, and forming an insulating film on the CF film processed by using an insulating material processed with the plasma.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: September 20, 2011
    Assignee: Tokyo Electron Limited
    Inventors: Kotaro Miyatani, Kohei Kawamura, Toshihisa Nozawa, Takaaki Matsuoka
  • Publication number: 20110135842
    Abstract: A method and system for plasma-assisted thin film vapor deposition on a substrate is described. The system includes a process chamber including a first process space having a first volume, a substrate stage coupled to the process chamber and configured to support a substrate and expose the substrate to the first process space, a plasma generation system coupled to the process chamber and configured to generate plasma in at least a portion of the first process space, and a vacuum pumping system coupled to the process chamber and configured to evacuate at least a portion of the first process space. The system further includes a process volume adjustment mechanism coupled to the process chamber and configured to create a second process space that includes at least a part of the first process space and that has a second volume less than the first volume, the substrate being exposed to the second process space.
    Type: Application
    Filed: February 10, 2011
    Publication date: June 9, 2011
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Jacques FAGUET, Masahide Iwasaki, Toshihisa Nozawa
  • Patent number: 7940009
    Abstract: A plasma processing apparatus includes a chamber for carrying out plasma processing inside, a top plate made of a dielectric material for sealing the upper side of this chamber, and an antenna section that serves as a high frequency supply for supplying high frequency waves into the chamber via this top plate. The top plate is provided with reflecting members inside thereof. The sidewalls of the reflecting members work as wave reflector for reflecting high frequency waves that propagate inside the top plate in the radius direction. Alternatively, no reflecting members may be provided in a manner in which the sidewalls of a recess of the top plate serve as a wave reflector means.
    Type: Grant
    Filed: November 20, 2008
    Date of Patent: May 10, 2011
    Assignee: Tokyo Electron Limited
    Inventors: Kiyotaka Ishibashi, Toshihisa Nozawa
  • Patent number: 7930992
    Abstract: Resonance can be surely provided under any plasma condition in such a manner that an antenna (3) is arranged in an opening of an upper part of a chamber (1) to produce an electromagnetic field generated by a microwave, a top plate (4) for sealing the opening of the chamber (1) is provided under the antenna (3), a ring-shaped ridge (41) is provided on a lower surface of the top plate (4) such that a thickness thereof in a diameter direction is tapered so as to be varied sequentially. Thus, only one kind of top plate has the same effect as a top plate having various thicknesses, so that absorption efficiency to the plasma can be considerably improved and the plasma can be generated stably over a range from a high pressure to a low pressure.
    Type: Grant
    Filed: September 3, 2004
    Date of Patent: April 26, 2011
    Assignee: Tokyo Electron Limited
    Inventors: Toshihisa Nozawa, Kiyotaka Ishibashi
  • Publication number: 20110074013
    Abstract: A silicon compound gas, an oxidizing gas, and a rare gas are supplied into a chamber (2) of a plasma processing apparatus (1). A microwave is supplied into the chamber (2), and a silicon oxide film is formed on a target substrate with plasma generated by the microwave. A partial pressure ratio of the rare gas is 10% or more of a total gas pressure of the silicon compound gas, the oxidizing gas, and the rare gas, and an effective flow ratio of the silicon compound gas and the oxidizing gas (oxidizing gas/silicon compound gas) is not less than 3 but not more than 11.
    Type: Application
    Filed: May 11, 2009
    Publication date: March 31, 2011
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Hirokazu Ueda, Yoshinobu Tanaka, Yusuke Ohsawa, Toshihisa Nozawa, Takaaki Matsuoka
  • Patent number: 7895971
    Abstract: A microwave plasma processing apparatus which easily ensures uniformity and stability of plasma in response to changes of process conditions and the like. The microwave plasma processing apparatus generates plasma of a process gas in a chamber by microwave and performs plasma processing to a work to be processed by using the plasma. On a plate composed of a conductor covering the outer circumference of a microwave transmitting board, two or more holes for propagating microwave from an edge part of the microwave transmitting board to an inner part of the plate are formed. Volume adjusting mechanisms and adjust the volume of the holes to adjust impedance of each unit when the microwave transmitting board is divided into individual units to which each of the holes belongs, and electric field distribution of the microwave transmitting board is controlled.
    Type: Grant
    Filed: October 6, 2005
    Date of Patent: March 1, 2011
    Assignee: Tokyo Electron Limited
    Inventors: Caizhong Tian, Toshihisa Nozawa
  • Publication number: 20110039355
    Abstract: The invention can provide apparatus and methods of processing a substrate using plasma generation by gravity-induced gas-diffusion separation techniques. By adding or using gases including inert and process gases with different gravities (i.e., ratio between the molecular weight of a gaseous constituent and a reference molecular weight), a two-zone or multiple-zone plasma can be formed, in which one kind of gas can be highly constrained near a plasma generation region and another kind of gas can be largely separated from the aforementioned gas due to differential gravity induced diffusion and is constrained more closer to a wafer process region than the aforementioned gas.
    Type: Application
    Filed: August 10, 2010
    Publication date: February 17, 2011
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Jianping Zhao, Lee Chen, Merritt Funk, Toshihisa Nozawa
  • Patent number: 7874781
    Abstract: A substrate processing apparatus includes a plurality of process chambers (20) for applying a process to substrate accommodated therein and a conveyance case (24) that conveys the accommodated substrates to the process chambers (20) and a transfer mechanism that moves the conveyance case (24) along a moving path. The conveyance case accommodates the substrates in an isolated state from an external atmosphere. The plurality of process chambers (20) are arranged in an aligned state on both sides of a moving path of the conveyance case (24). The conveyance case (24) has two conveyance ports (24a) in response to conveyance ports (20a) of the process chambers (20) arranged in alignment in two rows.
    Type: Grant
    Filed: August 26, 2004
    Date of Patent: January 25, 2011
    Assignee: Tokyo Electron Limited
    Inventors: Toshihisa Nozawa, Takaaki Matsuoka
  • Publication number: 20110000780
    Abstract: A plasma generation chamber of a plasma processing apparatus is closed by a top plate 3. The top plate 3 has recesses 3A on its surface facing the plasma generation chamber and a central recess 3B on an opposite surface. The top plate 3 is coupled to an antenna thereon. If a microwave is supplied to the antenna, the microwave is radiated through slots of the antenna. The microwave is propagated through the top plate 3 such that the microwave has a plane of polarization and the microwave forms a circularly polarized wave as a whole. Here, resonance absorption of the microwave occurs at a side surface of recesses 3A and the microwave is propagated within the recesses 3A in a single mode. Strong plasma can be generated within each of the recesses 3A, so that a stable plasma mode can be generated in the top plate 3.
    Type: Application
    Filed: February 10, 2009
    Publication date: January 6, 2011
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Caizhong Tian, Kiyotaka Ishibashi, Toshihisa Nozawa
  • Patent number: 7828927
    Abstract: A plasma processing device comprising a chamber (1) for accommodating therein a substrate (11), a high-frequency power supply (5) for generating microwave, and an antenna unit (3) for radiating microwave into the chamber (1). Microwave generated in the power supply (5) is sent to the antenna unit (3) via a waveguide (6). A top plate (4) forming part of a partition wall of the chamber (1) is formed at the upper portion of the chamber (1). A specified annular delay pass unit (2) formed of the same material as that of the top plate (4), for delaying the propagation of microwave, is provided on the outer peripheral portion of the top plate (4). Accordingly, the plasma processing device can restrict an abnormal discharge and the production of the foreign matters.
    Type: Grant
    Filed: February 18, 2005
    Date of Patent: November 9, 2010
    Assignee: Tokyo Electron Limited
    Inventors: Kiyotaka Ishibashi, Toshihisa Nozawa
  • Publication number: 20100279512
    Abstract: A plasma processing apparatus includes an antenna unit for generating plasma by using microwaves as a plasma source in such a way that a first region having a relatively high electron temperature of plasma, and a second region having a lower electron temperature of plasma than the first region are formed in a chamber, a first arranging means for arranging a semiconductor substrate W in the first region, a second arranging means for arranging the semiconductor substrate in the second region, and a plasma generation stopping means for stopping the generation of plasma of a plasma generating means, while the semiconductor substrate is arranged in the second region.
    Type: Application
    Filed: October 30, 2008
    Publication date: November 4, 2010
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Hirokazu Udea, Tetsuya Nishizuka, Toshihisa Nozawa, Takaaki Matsuoka