Patents by Inventor Kensuke Ara

Kensuke Ara 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: 20200082964
    Abstract: A composite magnetic body with high permeability and low magnetic loss in a high-frequency region of a gigahertz band; and a high-frequency electronic component using the same, the electronic component being compact and having low-insertion loss. This composite magnetic body has a high permeability and a low magnetic loss especially in a high-frequency region of a gigahertz band, and is provided with: a plurality of magnetic nanowires 361-363 aligned so as not to cross each other; and insulators 365-367 that electrically insulate the plurality of magnetic nanowires 361-363.
    Type: Application
    Filed: March 30, 2018
    Publication date: March 12, 2020
    Applicant: TDK CORPORATION
    Inventors: Takeshi SAKAMOTO, Yoshihiro SHINKAI, Yu YONEZAWA, Hideharu MORO, Kensuke ARA, Tohru OIKAWA, Isao KANADA, Kenji HORINO, Kyung-Ku CHOI
  • Patent number: 10535455
    Abstract: A soft magnetic alloy including a main component having a compositional formula of (Fe(1?(?+?))X1?X2?)(1?(a+b+c))MaBbPc, and a sub component including at least C, S and Ti, wherein X1 is one or more selected from the group including Co and Ni, X2 is one or more selected from the group including Al, Mn, Ag, Zn, Sn, As, Sb, Bi, and rare earth elements, “M” is one or more selected from the group including Nb, Hf, Zr, Ta, Mo, W, and V, 0.020?a?0.14, 0.020?b?0.20, 0?c?0.040, ??0, ??0, and 0??+??0.50 are satisfied, when entire said soft magnetic alloy is 100 wt %, a content of said C is 0.001 to 0.050 wt %, a content of said S is 0.001 to 0.050 wt %, and a content of said Ti is 0.001 to 0.080 wt %, and when a value obtained by dividing the content of said C by the content of said S is C/S, then C/S satisfies 0.10?C/S?10.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: January 14, 2020
    Assignee: TDK CORPORATION
    Inventors: Akihiro Harada, Hiroyuki Matsumoto, Kenji Horino, Kazuhiro Yoshidome, Akito Hasegawa, Hajime Amano, Kensuke Ara, Seigo Tokoro, Shota Otsuka
  • Publication number: 20190221342
    Abstract: A soft magnetic alloy includes a main component of (Fe(1?(?+?))X1?X2?)(1?(a+b+c+d+e))MaBbPcSidCe. X1 is one or more of Co and Ni. X2 is one or more of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, O, and rare earth elements. M is one or more of Nb, Hf, Zr, Ta, Mo, W, and V. 0.020?a?0.14 is satisfied. 0.020<b?0.20 is satisfied. 0?d?0.060 is satisfied. ??0 is satisfied. ??0 is satisfied. 0??+??0.50 is satisfied. c and e are within a predetermined range. The soft magnetic alloy has a nanohetero structure or a structure of Fe based nanocrystallines.
    Type: Application
    Filed: January 10, 2019
    Publication date: July 18, 2019
    Applicant: TDK CORPORATION
    Inventors: Kazuhiro YOSHIDOME, Akihiro HARADA, Hiroyuki MATSUMOTO, Kenji HORINO, Akito HASEGAWA, Kensuke ARA, Hajime AMANO, Masakazu HOSONO
  • Publication number: 20190221341
    Abstract: A soft magnetic alloy includes a main component of (Fe(1-(?+?))X1?X2?)(1-(a+b+c+d+e+f+g))MaBbPcSidCeSfTig. X1 is one or more of Co and Ni. X2 is one or more of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, O, and rare earth elements. M is one or more of Nb, Hf, Zr, Ta, Mo, W, and V. 0.020?a?0.14 is satisfied. 0.020<b?0.20 is satisfied. 0?d?0.060 is satisfied. 0?f?0.010 is satisfied. 0?g?0.0010 is satisfied. ??0 is satisfied. ??0 is satisfied. 0??+??0.50 is satisfied. At least one or more off and g are larger than zero. c and e are within a predetermined range. The soft magnetic alloy has a nanohetero structure or a structure of Fe based nanocrystallines.
    Type: Application
    Filed: December 28, 2018
    Publication date: July 18, 2019
    Applicant: TDK CORPORATION
    Inventors: Kazuhiro YOSHIDOME, Akihiro HARADA, Hiroyuki MATSUMOTO, Kenji HORINO, Akito HASEGAWA, Kensuke ARA, Hajime AMANO, Masakazu HOSONO
  • Publication number: 20190214171
    Abstract: A soft magnetic alloy which includes nanocrystal parts and amorphous parts is provided. The nanocrystal parts include ?Fe(—Si) as a main component, and include at least one of elements selected from B, P, C, Ti, Zr, Hf, Nb, Ta, Mo, V, W, Cr, Al, Mn, Zn, and Cu as a sub-component. When a total content ratio of the sub-component in the nanocrystal parts is set as ? (at %), and a total content ratio of the sub-components of the nanocrystal parts included in the amorphous parts is set as ? (at %), 0.01?(?/?)?0.40, and a crystallinity degree is 5% or more and 70% or less.
    Type: Application
    Filed: December 17, 2018
    Publication date: July 11, 2019
    Applicant: TDK CORPORATION
    Inventors: Kazuhiro YOSHIDOME, Hiroyuki MATSUMOTO, Kenji HORINO, Akito HASEGAWA, Hajime AMANO, Kensuke ARA, Akihiro HARADA
  • Publication number: 20190108931
    Abstract: A soft magnetic alloy contains a main component having a composition formula of (Fe(1?(???))X1?X2?)1?(a+b+c+d))MaBbPcCd and auxiliary components including at least Ti, Mn and Al. In the composition formula, X1 is one or more selected from the group consisting of Co and Ni, X2 is one or more selected from the group consisting of Ag, Zn, Sn, As, Sb, Bi and a rare earth element, and M is one or more selected from the group consisting of Nb, Hf, Zr, Ta, Mo, W and V. In the composition formula, 0.030?a?0.100, 0.050?b?0.150, 0?c?0.030, 0?d?0.030, ??0, ??0, and 0??+??0.50 are satisfied. In the soft magnetic alloy, a content of Ti is 0.001 to 0.100 wt %, a content of Mn is 0.001 to 0.150 wt %, and a content of Al is 0.001 to 0.100 wt %.
    Type: Application
    Filed: September 28, 2018
    Publication date: April 11, 2019
    Applicant: TDK CORPORATION
    Inventors: Akihiro HARADA, Hiroyuki MATSUMOTO, Kenji HORINO, Kazuhiro YOSHIDOME, Akito HASEGAWA, Hajime AMANO, Kensuke ARA, Seigo TOKORO, Masakazu HOSONO, Takuma NAKANO, Satoko MORI
  • Publication number: 20180218813
    Abstract: A soft magnetic alloy comprising a main component having a compositional formula of ((Fe(1?(?+?))X1?X2?)(1?(a+b+c))MaBbCrc)1?dCd, and a sub component including P, S and Ti, wherein X1 is selected from the group Co and Ni, X2 is selected from the group Al, Mn, Ag, Zn, Sn, As, Sb, Bi and rare earth elements, “M” is selected from the group Nb, Hf, Zr, Ta, Mo, W and V, 0.030?a?0.14, 0.005?b?0.20, 0<c?0.040, 0?d?0.040, ??0, ??0, and 0??+??0.50 are satisfied, when soft magnetic alloy is 100 wt %, P is 0.001 to 0.050 wt %, S is 0.001 to 0.050 wt %, and Ti is 0.001 to 0.080 wt %, and when a value obtained by dividing P by S is P/S, then P/S satisfies 0.10?P/S?10.
    Type: Application
    Filed: January 26, 2018
    Publication date: August 2, 2018
    Applicant: TDK CORPORATION
    Inventors: Akihiro HARADA, Hiroyuki MATSUMOTO, Kenji HORINO, Kazuhiro YOSHIDOME, Akito HASEGAWA, Hajime AMANO, Kensuke ARA, Seigo TOKORO
  • Publication number: 20180218812
    Abstract: A soft magnetic alloy including a compositional formula of ((Fe(1?(?+?))X1?X2?)(1?(a+b+c+e))MaBbPcCue)1?fCf, wherein X1 is one or more selected from the group consisting Co and Ni, X2 is one or more selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, O, and rare earth elements, “M” is one or more selected from the group consisting of Nb, Hf, Zr, Ta, Ti, Mo, W, and V, 0.030<a?0.14, 0.028?b?0.20, 0?c?0.030, 0<e?0.030, 0<f?0.040, ??0, ??0, and 0??+??0.50 are satisfied.
    Type: Application
    Filed: January 26, 2018
    Publication date: August 2, 2018
    Applicant: TDK CORPORATION
    Inventors: Akihiro HARADA, Hiroyuki MATSUMOTO, Kenji HORINO, Kazuhiro YOSHIDOME, Akito HASEGAWA, Hajime AMANO, Kensuke ARA, Seigo TOKORO, Shota OTSUKA
  • Publication number: 20180218810
    Abstract: A soft magnetic alloy including a main component having a compositional formula of (Fe(1?(?+?))X1?X2?)(1?(a+b+c))MaBbPc, and a sub component including at least C, S and Ti, wherein X1 is one or more selected from the group including Co and Ni, X2 is one or more selected from the group including Al, Mn, Ag, Zn, Sn, As, Sb, Bi, and rare earth elements, “M” is one or more selected from the group including Nb, Hf, Zr, Ta, Mo, W, and V, 0.020?a?0.14, 0.020?b?0.20, 0?c?0.040, ??0, ??0, and 0??+??0.50 are satisfied, when entire said soft magnetic alloy is 100 wt %, a content of said C is 0.001 to 0.050 wt %, a content of said S is 0.001 to 0.050 wt %, and a content of said Ti is 0.001 to 0.080 wt %, and when a value obtained by dividing the content of said C by the content of said S is C/S, then C/S satisfies 0.10?C/S?10.
    Type: Application
    Filed: January 26, 2018
    Publication date: August 2, 2018
    Applicant: TDK CORPORATION
    Inventors: Akihiro HARADA, Hiroyuki MATSUMOTO, Kenji HORINO, Kazuhiro YOSHIDOME, Akito HASEGAWA, Hajime AMANO, Kensuke ARA, Seigo TOKORO, Shota OTSUKA
  • Publication number: 20180218811
    Abstract: A soft magnetic alloy comprising a main component having a compositional formula of ((Fe(1?(?+?))X1?X2?)(1?(a+b))MaBb)1?cCc, and a sub component including P, S and Ti, wherein X1 is selected from the group Co and Ni, X2 is selected from the group Al, Mn, Ag, Zn, Sn, As, Sb, Bi, and rare earth elements, “M” is one or more selected from the group Nb, Hf, Zr, Ta, Mo, W, and V, 0.030?a?0.14, 0.005?b?0.20, 0?c?0.040, ??0, ??0, and 0??+??0.50 are satisfied, when magnetic alloy is 100 wt %, P is 0.001 to 0.050 wt %, S is 0.001 to 0.050 wt %, and Ti is 0.001 to 0.080 wt %, and when a value obtained by dividing P by S is P/S, then P/S satisfies 0.10?P/S?10.
    Type: Application
    Filed: January 26, 2018
    Publication date: August 2, 2018
    Applicant: TDK CORPORATION
    Inventors: Akihiro HARADA, Hiroyuki MATSUMOTO, Kenji HORINO, Kazuhiro YOSHIDOME, Akito HASEGAWA, Hajime AMANO, Kensuke ARA, Seigo TOKORO
  • Publication number: 20180122543
    Abstract: A soft magnetic alloy including a composition having a formula of ((Fe(1?(?+?))X1?X2?)(1?(a+b+d+e))MaBbCrdCue)1?fCf. X1 is one or more elements selected from a group of Co and Ni. X2 is one or more elements selected from a group of W, Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, O, and rare earth elements. M is one or more elements selected from a group of Nb, Hf, Zr, Ta, Ti, Mo, and V. 0.030?a?0.14, 0.028?b?0.15, 0.005?d?0.020, 0<e?0.030, 0?f?0.040, ??0, ??0, and 0??+??0.50 are satisfied.
    Type: Application
    Filed: October 26, 2017
    Publication date: May 3, 2018
    Applicant: TDK CORPORATION
    Inventors: Akihiro HARADA, Hiroyuki MATSUMOTO, Kenji HORINO, Kazuhiro YOSHIDOME, Akito HASEGAWA, Hajime AMANO, Kensuke ARA, Masahito KOEDA, Seigo TOKORO
  • Publication number: 20180122540
    Abstract: A soft magnetic alloy including a composition having a formula of ((Fe(1-(?+?))X1?X2?)(1-(a+b+c+d+e))MaBbPcCrdCue)1-fCf. X1 is one or more elements selected from a group of Co and Ni. X2 is one or more elements selected from a group of W, Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, O, and rare earth elements. M is one or more elements selected from a group of Nb, Hf, Zr, Ta, Ti, Mo, and V. 0.020?a?0.060, 0.020?b?0.060, 0?c?0.030, 0?d?0.050, 0?e?0.030, 0<f?0.040, ??0, ??0, and 0??+??0.50 are satisfied.
    Type: Application
    Filed: October 26, 2017
    Publication date: May 3, 2018
    Applicant: TDK CORPORATION
    Inventors: Hiroyuki MATSUMOTO, Kenji HORINO, Kazuhiro YOSHIDOME, Akihiro HARADA, Akito HASEGAWA, Hajime AMANO, Kensuke ARA, Masahito KOEDA, Seigo TOKORO
  • Publication number: 20180122542
    Abstract: A soft magnetic alloy including a composition having a formula of ((Fe(1-(?+?))X1?X2?)(1-(a+b+c+d+e))MaBbPcCrdCue)1-fCf. X1 is one or more elements selected from a group of Co and Ni. X2 is one or more elements selected from a group of W, Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, O, and rare earth elements. M is one or more elements selected from a group of Nb, Hf, Zr, Ta, Ti, Mo, and V. 0.030?a?0.14, 0.028?b?0.20, 0<c?0.014, 0<d?0.040, 0?e?0.030, 0?f?0.040, ??0, ??0, and 0??+??0.50 are satisfied.
    Type: Application
    Filed: October 26, 2017
    Publication date: May 3, 2018
    Applicant: TDK CORPORATION
    Inventors: Hiroyuki MATSUMOTO, Kenji HORINO, Kazuhiro YOSHIDOME, Akihiro HARADA, Akito HASEGAWA, Hajime AMANO, Kensuke ARA, Masahito KOEDA, Seigo TOKORO
  • Patent number: 7732652
    Abstract: The invention aims to provide a perylene derivative preparation process featuring satisfactory yields and improved preparation efficiency, a perylene derivative obtained by the process, and an organic EL device using the same.
    Type: Grant
    Filed: October 7, 2004
    Date of Patent: June 8, 2010
    Assignee: TDK Corporation
    Inventors: Tetsuji Fujita, Kensuke Ara, Tetsushi Inoue
  • Patent number: 7318965
    Abstract: The invention aims to provide a perylene derivative preparation process featuring satisfactory yields and improved preparation efficiency, a perylene derivative obtained by the process, and an organic EL device using the same.
    Type: Grant
    Filed: July 5, 2002
    Date of Patent: January 15, 2008
    Assignee: TDK Corporation
    Inventors: Tetsuji Fujita, Kensuke Ara, Tetsushi Inoue
  • Publication number: 20050054852
    Abstract: The invention aims to provide a perylene derivative preparation process featuring satisfactory yields and improved preparation efficiency, a perylene derivative obtained by the process, and an organic EL device using the same.
    Type: Application
    Filed: October 7, 2004
    Publication date: March 10, 2005
    Applicant: TDK CORPORATION
    Inventors: Tetsuji Fujita, Kensuke Ara, Tetsushi Inoue
  • Patent number: 6613454
    Abstract: In an organic EL device comprising organic layers between a pair of electrodes participating in at least a light emitting function, at least one organic layer contains an organic compound selected from naphthacene, tetraaryldiamine, anthracene and quinoxaline derivatives as a host material and an organic compound having a specific skeleton, typically diindeno[1,2,3-cd:1′,2′,3′-lm]perylene derivative as a dopant. The device is capable of light emission to a satisfactory luminance, especially in a long wavelength region, and with a chromatic purity sufficient for use in full color displays, and had a sufficient durability to sustain such improved light emission performance over a long time.
    Type: Grant
    Filed: April 20, 2001
    Date of Patent: September 2, 2003
    Assignee: TDK Corporation
    Inventors: Kensuke Ara, Tetsushi Inoue, Tetsuji Fujita
  • Publication number: 20030137241
    Abstract: The invention aims to provide a perylene derivative preparation process featuring satisfactory yields and improved preparation efficiency, a perylene derivative obtained by the process, and an organic EL device using the same.
    Type: Application
    Filed: July 5, 2002
    Publication date: July 24, 2003
    Applicant: TDK CORPORATION
    Inventors: Tetsuji Fujita, Kensuke Ara, Tetsushi Inoue
  • Publication number: 20030027016
    Abstract: In an organic EL device comprising organic layers between a pair of electrodes participating in at least a light emitting function, at least one organic layer contains an organic compound selected from naphthacene, tetraaryldiamine, anthracene and quinoxaline derivatives as a host material and an organic compound having a specific skeleton, typically diindeno[1,2,3-cd:1′,2′,3′-lm]perylene derivative as a dopant. The device is capable of light emission to a satisfactory luminance, especially in a long wavelength region, and with a chromatic purity sufficient for use in full color displays, and had a sufficient durability to sustain such improved light emission performance over a long time.
    Type: Application
    Filed: April 20, 2001
    Publication date: February 6, 2003
    Applicant: TDK CORPORATION
    Inventors: Kensuke Ara, Tetsushi Inoue, Tetsuji Fujita
  • Patent number: 5906768
    Abstract: A ferrite core of the invention is useful for reducing the power loss of Ni--Cu--Zn ferrites, and so for particle accelerators, and power transformers. This core comprises a ferrite magnetic material containing as major components 47 to 50 mol % of iron oxide calculated as Fe.sub.2 O.sub.3, 10 to 25 mol % of nickel oxide calculated as NiO, 2 to 15 mol % of copper oxide calculated as CuO and 15 to 35 mol % of zinc oxide calculated as ZnO, and further containing as subordinate components 0.05 to 1.5 wt % of cobalt oxide calculated as CoO, 0.05 to 0.8 wt % of tungsten oxide calculated as WO.sub.3 and 0.03 to 0.5 wt % of bismuth oxide calculated as Bi.sub.2 O.sub.3, all based on the major components. Consequently, there is achieved a ferrite core having a power loss at 100.degree. C. of up to 210 kW/m.sup.3, and a power loss at 25.degree. C. of up to 140 kW/m.sup.3, as measured at f.multidot.Bm product=25 kTHz (f=1 to 10 MHz).
    Type: Grant
    Filed: April 4, 1997
    Date of Patent: May 25, 1999
    Assignee: TDK Corporation
    Inventors: Sei Kakinuma, Yutaka Saito, Kensuke Ara