Patents by Inventor Akio Kawabata

Akio Kawabata 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: 10847438
    Abstract: A CNT-metal composite structure is formed by forming a plurality of CNTs which stand side by side from a base substance, forming a sheet-shaped support film which covers upper ends of the CNTs, and filling gaps each present between adjacent ones of the CNTs with a metal. By this structure, highly reliable bonding sheet and heat dissipation mechanism which are very excellent in heat dissipation efficiency, and manufacturing methods of these are realized.
    Type: Grant
    Filed: October 23, 2018
    Date of Patent: November 24, 2020
    Assignee: FUJITSU LIMITED
    Inventor: Akio Kawabata
  • Publication number: 20190057925
    Abstract: A CNT-metal composite structure is formed by forming a plurality of CNTs which stand side by side from a base substance, forming a sheet-shaped support film which covers upper ends of the CNTs, and filling gaps each present between adjacent ones of the CNTs with a metal. By this structure, highly reliable bonding sheet and heat dissipation mechanism which are very excellent in heat dissipation efficiency, and manufacturing methods of these are realized.
    Type: Application
    Filed: October 23, 2018
    Publication date: February 21, 2019
    Inventor: Akio KAWABATA
  • Publication number: 20160104655
    Abstract: A CNT-metal composite structure is formed by forming a plurality of CNTs which stand side by side from a base substance, forming a sheet-shaped support film which covers upper ends of the CNTs, and filling gaps each present between adjacent ones of the CNTs with a metal. By this structure, highly reliable bonding sheet and heat dissipation mechanism which are very excellent in heat dissipation efficiency, and manufacturing methods of these are realized.
    Type: Application
    Filed: December 18, 2015
    Publication date: April 14, 2016
    Applicant: FUJITSU LIMITED
    Inventor: Akio KAWABATA
  • Publication number: 20140037902
    Abstract: With TiN being a base material, TiN fine particles are deposited on a silicone substrate by, for example, a laser ablation method so that diameters of the TiN fine particles are about 3 nm, and thereafter, Co fine particles are deposited on the silicon substrate on which the TiN fine particles are deposited, by, for example, the laser ablation method so that sizes of the Co fine particles are equal to or smaller than sizes of the fine particles of the TiN fine particles, here about 1 nm in diameter.
    Type: Application
    Filed: October 8, 2013
    Publication date: February 6, 2014
    Applicant: FUJITSU SEMICONDUCTOR LIMITED
    Inventor: Akio Kawabata
  • Patent number: 8574679
    Abstract: With TiN being a base material, TiN fine particles are deposited on a silicone substrate by, for example, a laser ablation method so that diameters of the TiN fine particles are about 3 nm, and thereafter, Co fine particles are deposited on the silicon substrate on which the TiN fine particles are deposited, by, for example, the laser ablation method so that sizes of the Co fine particles are equal to or smaller than sizes of the fine particles of the TiN fine particles, here about 1 nm in diameter.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: November 5, 2013
    Assignee: Fujitsu Semiconductor Limited
    Inventor: Akio Kawabata
  • Patent number: 8535635
    Abstract: A method of manufacturing carbon cylindrical structures, as represented by carbon nanotubes, by growing them on a substrate using a chemical vapor deposition (CVD) method, comprising the steps of implanting metal ions to the substrate surface and then growing the carbon cylindrical structures using the metal ions as a catalyst. A method of manufacturing carbon nanotubes comprising a step of using nano-carbon material as seed material for growing carbon nanotubes is also disclosed. A biopolymer detection device comprising vibration inducing part for inducing vibration, binding part capable of resonating with the vibration induced by the vibration inducing part and capable of binding or interacting with a target biopolymer, and detection part for detecting whether or not the binding part have bound or interacted with the target biopolymer, is also disclosed.
    Type: Grant
    Filed: June 19, 2009
    Date of Patent: September 17, 2013
    Assignee: Fujitsu Limited
    Inventors: Yuji Awano, Akio Kawabata, Shozo Fujita
  • Patent number: 8501108
    Abstract: When growing carbon nanotubes, a substrate is delivered into a thermal CVD chamber whose internal temperature is a room temperature, and a mixed gas of an inert gas and a raw gas is introduced in the inside thereof. After a pressure inside of the chamber is stabilized at 1 kPa, the temperature in the chamber is raised to 510° C. in 1 minute. As a result, the carbon nanotubes start to grow linearly from the respective catalytic particles without any fusion of each of the catalytic particles. Subsequently, the temperature and an atmosphere are maintained for about 30 minutes. Once the carbon nanotubes start to grow, surfaces of the catalytic particles are covered by carbon, so that any fusion of each of the catalytic particles can be avoided even during the maintenance for about 30 minutes.
    Type: Grant
    Filed: February 7, 2011
    Date of Patent: August 6, 2013
    Assignee: Fujitsu Limited
    Inventor: Akio Kawabata
  • Patent number: 8372487
    Abstract: After forming an opening, a resist film is formed on the entire surface and a resist pattern is formed by patterning the resist film. The shape of the resist pattern is such that it covers one side of the bottom of the opening. As a result, a Si substrate is exposed only in one part of the opening. Then, using the resist pattern as a mask, a catalytic layer is formed on the bottom of the opening. Then, the resist pattern is removed. Carbon nanotubes are grown on the catalytic layer. At this time, since the catalytic layer is formed on only one side of the bottom of the opening, the Van der Waals force biased towards that side works horizontally on the growing carbon nanotubes. Therefore, the carbon nanotubes are attracted towards the nearest side of the SiO2 film and grow biased towards that side.
    Type: Grant
    Filed: June 4, 2009
    Date of Patent: February 12, 2013
    Assignee: Fujitsu Limited
    Inventors: Akio Kawabata, Mizuhisa Nihei, Daiyu Kondo, Shintaro Sato
  • Patent number: 8277770
    Abstract: Carbon atoms are fed to a catalytic metal particle 10 having a atomic arrangement of triangular lattices in a round (or partly round) of a side wall, and a graphen sheet 18 having a six-membered structure reflecting the atomic arrangement of the triangular lattices is consecutively formed by the metal catalyst, whereby a tubular structure of the carbon atoms is formed. Thus, the chirality of the tubular structure can be controlled by the growth direction of the graphen sheet with respect to the direction of the triangular lattices, and the diameter of the tubular structure can be controlled by the size of the catalytic metal particle.
    Type: Grant
    Filed: August 1, 2007
    Date of Patent: October 2, 2012
    Assignees: Fujitsu Limited, Meijo University Educational Foundation
    Inventors: Yuji Awano, Shigeya Naritsuka, Akio Kawabata, Takahiro Maruyama
  • Patent number: 8163647
    Abstract: An electronic device having a structure of an ohmic connection to a carbon element cylindrical structure body, wherein a metal material is positioned inside the junction part of a carbon element cylindrical structure body joined to a connection objective and the carbon element cylindrical structure body and the connection objective are connected by an ohmic contact. Methods for producing such an electronic device are also disclosed. Further, a method for growing a carbon nanotube is disclosed.
    Type: Grant
    Filed: July 8, 2009
    Date of Patent: April 24, 2012
    Assignee: Fujitsu Limited
    Inventors: Akio Kawabata, Mizuhisa Nihei
  • Patent number: 8093147
    Abstract: An aggregate structure of carbon fibers, organized by a plurality of carbon fibers, includes, an aggregate of the carbon fibers aligned in a lengthwise direction, in which a density of the carbon fibers at one side end is different from a density of the carbon fibers at the other side end.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: January 10, 2012
    Assignee: Fujitsu Limited
    Inventors: Akio Kawabata, Shintaro Sato
  • Patent number: 8029760
    Abstract: According to a method of manufacturing carbon nanotubes, minute concavities and convexities are formed at a surface of a substrate, a catalyst metal layer having a predetermined film thickness is formed on the surface having the concavities and convexities, the substrate is subject to a heat treatment at a predetermined temperature to change the catalyst metal layer into a plurality of isolated fine particles. The catalyst metal fine particles have a uniform particle diameter and uniform distribution. Then, the substrate supporting the plurality of fine particles is placed in a carbon-containing gas atmosphere to grow carbon nanotubes on the catalyst metal fine particles by a CVD method using the carbon-containing gas. The carbon nanotubes can be formed to have a desired diameter and a desired shell number with superior reproducibility.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: October 4, 2011
    Assignee: Fujitsu Limited
    Inventors: Daiyu Kondo, Akio Kawabata, Shintaro Sato, Taisuke Iwai, Mizuhisa Nihei
  • Publication number: 20110142727
    Abstract: When growing carbon nanotubes, a substrate is delivered into a thermal CVD chamber whose internal temperature is a room temperature, and a mixed gas of an inert gas and a raw gas is introduced in the inside thereof. After a pressure inside of the chamber is stabilized at 1 kPa, the temperature in the chamber is raised to 510° C. in 1 minute. As a result, the carbon nanotubes start to grow linearly from the respective catalytic particles without any fusion of each of the catalytic particles. Subsequently, the temperature and an atmosphere are maintained for about 30 minutes. Once the carbon nanotubes start to grow, surfaces of the catalytic particles are covered by carbon, so that any fusion of each of the catalytic particles can be avoided even during the maintenance for about 30 minutes.
    Type: Application
    Filed: February 7, 2011
    Publication date: June 16, 2011
    Applicant: FUJITSU LIMITED
    Inventor: Akio Kawabata
  • Patent number: 7948081
    Abstract: A semiconductor device uses a carbon nanotube structure, which reduces an electric resistance and a thermal resistance by increasing a density of the carbon nanotubes. An insulation film covers a first electrically conductive material. A second electrically conductive material is provided on the insulation film. A plurality of carbon nanotubes extend through the insulation film by being filled in an opening part that exposes the first electrically conductive material. The carbon nanotubes electrically connect the first electrically conductive material and the second electrically conductive material to each other. Ends of the carbon nanotubes are fixed to a recessed part provided on a surface of the first electrically conductive material.
    Type: Grant
    Filed: January 25, 2005
    Date of Patent: May 24, 2011
    Assignee: Fujitsu Limited
    Inventors: Akio Kawabata, Mizuhisa Nihei, Masahiro Horibe
  • Patent number: 7906095
    Abstract: When growing carbon nanotubes, a substrate is delivered into a thermal CVD chamber whose internal temperature is a room temperature, and a mixed gas of an inert gas and a raw gas is introduced in the inside thereof. After a pressure inside of the chamber is stabilized at 1 kPa, the temperature in the chamber is raised to 510° C. in 1 minute. As a result, the carbon nanotubes start to grow linearly from the respective catalytic particles without any fusion of each of the catalytic particles. Subsequently, the temperature and an atmosphere are maintained for about 30 minutes. Once the carbon nanotubes start to grow, surfaces of the catalytic particles are covered by carbon, so that any fusion of each of the catalytic particles can be avoided even during the maintenance for about 30 minutes.
    Type: Grant
    Filed: June 26, 2008
    Date of Patent: March 15, 2011
    Assignee: Fujitsu Limited
    Inventor: Akio Kawabata
  • Publication number: 20100317187
    Abstract: An aggregate structure of carbon fibers, organized by a plurality of carbon fibers, includes, an aggregate of the carbon fibers aligned in a lengthwise direction, in which a density of the carbon fibers at one side end is different from a density of the carbon fibers at the other side end.
    Type: Application
    Filed: June 11, 2010
    Publication date: December 16, 2010
    Applicant: FUJITSU LIMITED
    Inventors: Akio KAWABATA, Shintaro SATO
  • Publication number: 20100316558
    Abstract: An aggregate structure of carbon fibers, organized by a plurality of carbon fibers, includes, an aggregate of the carbon fibers aligned in a lengthwise direction, in which a density of the carbon fibers at one side end is different from a density of the carbon fibers at the other side end.
    Type: Application
    Filed: June 11, 2010
    Publication date: December 16, 2010
    Applicant: FUJITSU LIMITED
    Inventors: Akio KAWABATA, Shintaro Sato
  • Patent number: 7736615
    Abstract: An aggregate structure of carbon fibers, organized by a plurality of carbon fibers, includes, an aggregate of the carbon fibers aligned in a lengthwise direction, in which a density of the carbon fibers at one side end is different from a density of the carbon fibers at the other side end.
    Type: Grant
    Filed: September 24, 2008
    Date of Patent: June 15, 2010
    Assignee: Fujitsu Limited
    Inventors: Akio Kawabata, Shintaro Sato
  • Publication number: 20100124529
    Abstract: A method of manufacturing carbon cylindrical structures, as represented by carbon nanotubes, by growing them on a substrate using a chemical vapor deposition (CVD) method, comprising the steps of implanting metal ions to the substrate surface and then growing the carbon cylindrical structures using the metal ions as a catalyst. A method of manufacturing carbon nanotubes comprising a step of using nano-carbon material as seed material for growing carbon nanotubes is also disclosed. A biopolymer detection device comprising vibration inducing part for inducing vibration, binding part capable of resonating with the vibration induced by the vibration inducing part and capable of binding or interacting with a target biopolymer, and detection part for detecting whether or not the binding part have bound or interacted with the target biopolymer, is also disclosed.
    Type: Application
    Filed: June 19, 2009
    Publication date: May 20, 2010
    Applicant: FUJITSU LIMTED
    Inventors: Yuji Awano, Akio Kawabata, Shozo Fujita
  • Publication number: 20090291216
    Abstract: After forming an opening, a resist film is formed on the entire surface and a resist pattern is formed by patterning the resist film. The shape of the resist pattern is such that it covers one side of the bottom of the opening. As a result, a Si substrate is exposed only in one part of the opening. Then, using the resist pattern as a mask, a catalytic layer is formed on the bottom of the opening. Then, the resist pattern is removed. Carbon nanotubes are grown on the catalytic layer. At this time, since the catalytic layer is formed on only one side of the bottom of the opening, the Van der Waals force biased towards that side works horizontally on the growing carbon nanotubes. Therefore, the carbon nanotubes are attracted towards the nearest side of the SiO2 film and grow biased towards that side.
    Type: Application
    Filed: June 4, 2009
    Publication date: November 26, 2009
    Applicant: FUJITSU LIMITED
    Inventors: Akio Kawabata, Mizuhisa Nihei, Daiyu Kondo, Shintaro Sato