Patents by Inventor Knuth Albertsen

Knuth Albertsen 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: 9847176
    Abstract: A dielectric material suitable for use in an electronic component includes bismuth ferrite, strontium titanate and an additive. The additive comprises barium titanate. The barium titanate reduces the temperature capacitance change of the dielectric material and allows for increased working voltages. The material is useful for the construction of capacitors, and particularly capacitors intended for use at high temperatures. Also provided are a capacitor including the dielectric material, methods of manufacturing the dielectric material and the capacitor, and the use of an additive to improve the lifetime and/or reduce the dissipation factor of a capacitor.
    Type: Grant
    Filed: February 19, 2015
    Date of Patent: December 19, 2017
    Assignee: KNOWLES (UK) LIMITED
    Inventors: Knuth Albertsen, Angela Ellmore
  • Publication number: 20170069427
    Abstract: A dielectric material suitable for use in an electronic component includes bismuth ferrite, strontium titanate and an additive. The additive comprises barium titanate. The barium titanate reduces the temperature capacitance change of the dielectric material and allows for increased working voltages. The material is useful for the construction of capacitors, and particularly capacitors intended for use at high temperatures. Also provided are a capacitor including the dielectric material, methods of manufacturing the dielectric material and the capacitor, and the use of an additive to improve the lifetime and/or reduce the dissipation factor of a capacitor.
    Type: Application
    Filed: February 19, 2015
    Publication date: March 9, 2017
    Inventors: Knuth Albertsen, Angela Ellmore
  • Patent number: 7727922
    Abstract: Multilayer ceramic chip capacitors which satisfy X8R requirements and which are compatible with reducing atmosphere sintering conditions so that non-noble metals such as nickel and nickel alloys thereof may be used for internal and external electrodes are made in accordance with the invention. The capacitors exhibit desirable dielectric properties (high capacitance, low dissipation factor, high insulation resistance), excellent performance on highly accelerated life testing, and very good resistance to dielectric breakdown. The dielectric layers comprise a barium titanate base material doped with other metal oxides such as BaO, Y2O3, ZrO2, SiO2, MgO, MnO, MoO3, CaO, Lu2O3, Yb2O3, or WO3 in various combinations.
    Type: Grant
    Filed: May 4, 2009
    Date of Patent: June 1, 2010
    Assignee: Ferro Corporation
    Inventors: Gerhardus W. Koebrugge, Knuth Albertsen, Willibrordus J. L. M. J. Coppens
  • Publication number: 20090213527
    Abstract: Multilayer ceramic chip capacitors which satisfy X8R requirements and which are compatible with reducing atmosphere sintering conditions so that non-noble metals such as nickel and nickel alloys thereof may be used for internal and external electrodes are made in accordance with the invention. The capacitors exhibit desirable dielectric properties (high capacitance, low dissipation factor, high insulation resistance), excellent performance on highly accelerated life testing, and very good resistance to dielectric breakdown. The dielectric layers comprise a barium titanate base material doped with other metal oxides such as BaO, Y2O3, ZrO2, SiO2, MgO, MnO, MoO3, CaO, Lu2O3, Yb2O3, or WO3 in various combinations.
    Type: Application
    Filed: May 4, 2009
    Publication date: August 27, 2009
    Applicant: FERRO CORPORATION
    Inventors: Gerhardus W. Koebrugge, Knuth Albertsen, Willibrordus J. L. M. J. Coppens
  • Patent number: 7541306
    Abstract: Multilayer ceramic chip capacitors which satisfy X8R requirements and which are compatible with reducing atmosphere sintering conditions so that non-noble metals such as nickel and nickel alloys thereof may be used for internal and external electrodes are made in accordance with the invention. The capacitors exhibit desirable dielectric properties (high capacitance, low dissipation factor, high insulation resistance), excellent performance on highly accelerated life testing, and very good resistance to dielectric breakdown. The dielectric layers comprise a barium titanate base material doped with other metal oxides such as BaO, Y2O3, ZrO2, SiO2, MgO, MnO, MoO3, CaO, Lu2O3, Yb2O3, or WO3 in various combinations.
    Type: Grant
    Filed: January 17, 2007
    Date of Patent: June 2, 2009
    Assignee: Ferro Corporation
    Inventors: Gerhardus W. Koebrugge, Knuth Albertsen, Willibrordus J. L. M. J. Coppens
  • Publication number: 20080169530
    Abstract: Multilayer ceramic chip capacitors which satisfy X8R requirements and which are compatible with reducing atmosphere sintering conditions so that non-noble metals such as nickel and nickel alloys thereof may be used for internal and external electrodes are made in accordance with the invention. The capacitors exhibit desirable dielectric properties (high capacitance, low dissipation factor, high insulation resistance), excellent performance on highly accelerated life testing, and very good resistance to dielectric breakdown. The dielectric layers comprise a barium titanate base material doped with other metal oxides such as BaO, Y2O3, ZrO2, SiO2, MgO, MnO, MoO3, CaO, Lu2O3, Yb2O3, or WO3 in various combinations.
    Type: Application
    Filed: January 17, 2007
    Publication date: July 17, 2008
    Applicant: FERRO CORPORATION
    Inventors: Gerhardus W. Koebrugge, Knuth Albertsen, Willibrordus J. L. M. J. Coppens
  • Patent number: 7230817
    Abstract: Multilayer ceramic chip capacitors which satisfy Y5V requirements and which are compatible with reducing atmosphere sintering conditions so that non-noble metals such as nickel, copper, and alloys thereof may be used for internal and external electrodes are made in accordance with the invention. The capacitors exhibit desirable dielectric properties (high capacitance, low dissipation factor, high insulation resistance), excellent performance on highly accelerated life testing, and very good resistance to dielectric breakdown. The dielectric layers comprise BaTiO3 doped with other metal oxides such as MgO, CaO, ZnO, MnO2, ZrO2, SiO2, Nd2O3, Nb2O5, and Y2O3.
    Type: Grant
    Filed: April 15, 2005
    Date of Patent: June 12, 2007
    Assignee: Ferro Corporation
    Inventors: Mohammed H. Megherhi, Mike S. H. Chu, Daniel E. McCauley, Elizabeth W. Römer, Willibrordus J. Coppens, Knuth Albertsen
  • Publication number: 20060232910
    Abstract: Multilayer ceramic chip capacitors which satisfy Y5V requirements and which are compatible with reducing atmosphere sintering conditions so that non-noble metals such as nickel, copper, and alloys thereof may be used for internal and external electrodes are made in accordance with the invention. The capacitors exhibit desirable dielectric properties (high capacitance, low dissipation factor, high insulation resistance), excellent performance on highly accelerated life testing, and very good resistance to dielectric breakdown. The dielectric layers comprise BaTiO3 doped with other metal oxides such as MgO, CaO, ZnO, MnO2, ZrO2, SiO2, Nd2O3, Nb2O5, and Y2O3.
    Type: Application
    Filed: April 15, 2005
    Publication date: October 19, 2006
    Applicant: Ferro Corporation
    Inventors: Mohammed Megherhi, Mike Chu, Daniel McCauley, Elisabeth Romer, Willibrordus Coppens, Knuth Albertsen
  • Patent number: 7041615
    Abstract: The dielectric composition contains a mixture of a ceramic composition containing BaaREbTicO3, wherein RE represents a rare earth element, with 0.05?a?0.25, 0.525?b?0.70, 0.85?c?1.0, and 2a+3b+4c=6, and free from lead and bismuth, a glass composition, and a metal oxide. The glass composition preferably contains ZnO or MgO, SiO2, and at least 10% by weight of Li2O or TiO2. Preferably, the alkaline earth metal oxide is MgO. By preference, the glass composition essentially consists of 50–80% weight of SiO2, 5–25% weight of MgO, and optionally another alkaline earth metal oxide, and 10–25% by weight of Li2O, and is substantially free from boron. The dielectric composition can be sintered in the presence of Cu electrodes at a temperature below the melting point of Cu so as to manufacture an electronic device such as a ceramic multilayer element. After sintering, the dielectric composition has a relative dielectric constant of at least 55.
    Type: Grant
    Filed: August 2, 2004
    Date of Patent: May 9, 2006
    Assignee: Koninkiljke Philips Electronics N.V.
    Inventors: Ronald Mikkenie, Gerardus Christiaan Marie Dortant, Knuth Albertsen, Heinz Georg Kohler, Tilman Schlenker
  • Publication number: 20050009685
    Abstract: The dielectric composition contains a mixture of a ceramic composition containing BaaREbTicO3, wherein RE represents a rare earth element, with 0.05?a?0.25, 0.525?b?0.70, 0.85?c?1.0, and 2a+3b+4c=6, and free from lead and bismuth, a glass composition, and a metal oxide. The glass composition preferably contains ZnO or MgO, SiO2, and at least 10% by weight of Li2O or TiO2. Preferably, the alkaline earth metal oxide is MgO. By preference, the glass composition essentially consists of 50-80% weight of SiO2, 5-25% weight of MgO, and optionally another alkaline earth metal oxide, and 10-25% by weight of Li2O, and is substantially free from boron. The dielectric composition can be sintered in the presence of Cu electrodes at a temperature below the melting point of Cu so as to manufacture an electronic device such as a ceramic multilayer element. After sintering, the dielectric composition has a relative dielectric constant of at least 55.
    Type: Application
    Filed: August 2, 2004
    Publication date: January 13, 2005
    Inventors: Ronald Mikkenie, Gerardus Dortant, Knuth Albertsen, Heinz Kohler, Tilman Schlenker
  • Patent number: 6797661
    Abstract: The dielectric composition contains a mixture of a ceramic composition containing BaaREbTicO3, wherein RE represents a rare earth element, with 0.05≦a≦0.25, 0.525≦b≦0.70, 0.85≦c≦1.0, and 2a+3b+4c=6, and free from lead and bismuth, a glass composition, and a metal oxide. The glass composition preferably contains ZnO or MgO, SiO2, and at least 10% by weight of Li2O or TiO2. Preferably, the alkaline earth metal oxide is MgO. By preference, the glass composition essentially consists of 50-80% weight of SiO2, 5-25% weight of MgO, and optionally another alkaline earth metal oxide, and 10-25% by weight of Li2O, and is substantially free from boron. The dielectric composition can be sintered in the presence of Cu electrodes at a temperature below the melting point of Cu so as to manufacture an electronic device such as a ceramic multilayer element. After sintering, the dielectric composition has a relative dielectric constant of at least 55.
    Type: Grant
    Filed: August 7, 2001
    Date of Patent: September 28, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Ronald Mikkenie, Gerardus Christiaan Marie Dortant, Knuth Albertsen, Heinz Georg Kohler, Tilman Schlenker
  • Patent number: 6744204
    Abstract: A gas discharge lamp with at least one capacitive coupling structure (2, 3) is described, which lamp has the particular characteristic that the coupling structure (2, 3) comprises a ceramic material which comprises pure BaTiO3. In particular an additional doping of at least part of the BaTiO3 with barium leads to a material whose Curie temperature and saturation polarization are substantially higher and whose coercitive field strength is substantially smaller, so that a gas discharge lamp with a coupling structure manufactured from this material can be operated at substantially higher temperatures and at a lower operating voltage. Various dopings of the BaTiO3 with titanium, manganese, and lead are furthermore described.
    Type: Grant
    Filed: May 7, 2002
    Date of Patent: June 1, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Wilhelm Albert Groen, Petra Huppertz, Knuth Albertsen, Bernd Rausenberger
  • Patent number: 6721164
    Abstract: The invention describes an electronic component, in particular a multiplayer component, with a dielectric and at least one electrode. The dielectric is a composite made of a dielectric ceramic material and an organic polymer. To manufacture the electronic component, the dielectric ceramic material is mixed with a suitable monomer, the mass id formed, and the monomer is polymerized. Ceramic bodies of stable shape are obtained which can be processed further into capacitors, antennas, or other passive components in that electrodes are provided. Sintering of the electronic components is no longer necessary.
    Type: Grant
    Filed: April 16, 2001
    Date of Patent: April 13, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Knuth Albertsen, Wilhelm-Albert Groen, Tilman Schlenker
  • Patent number: 6713946
    Abstract: A liquid crystal picture screen provided with a backlight system which comprises at least one gas discharge lamp and at least one capacitive coupling system with a dielectric material with the composition [A′a1n1+A″a2n2+ . . . An′annn+] [B′b1m1+B″b2m2+ . . . Bm′bmmn+]O3, wherein the cations A′a1n1+A″a2n2+ . . . An′annn+ comprise at least one or several of the cations chosen from the group of Ba2+, Pb2+, Sr2+ and Ca2+, as well as possibly one or several of the cations chosen from the group of Cs1+, Rb1+, Tl1+, K1+, Pb2+, Ag1+, Sr2+, Na1+, Bi3+, La3+, Mg2+, Zn2+, Ca2+, Ce3+, Cd2+, Pr3+, Nd3+, Eu3+, Gd3+ and Sm3+, and the cations B′b1m1+B″b2m2+ . . .
    Type: Grant
    Filed: May 30, 2002
    Date of Patent: March 30, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Wilhelm Albert Groen, Knuth Albertsen, Bernd Rausenberger
  • Publication number: 20020195927
    Abstract: A liquid crystal picture screen provided with a backlight system which comprises at least one gas discharge lamp and at least one capacitive coupling system with a dielectric material with the composition
    Type: Application
    Filed: May 30, 2002
    Publication date: December 26, 2002
    Inventors: Wilhelm Albert Groen, Knuth Albertsen, Bernd Rausenberger
  • Publication number: 20020171375
    Abstract: A gas discharge lamp with at least one capacitive coupling structure (2, 3) is described, which lamp has the particular characteristic that the coupling structure (2, 3) comprises a ceramic material which comprises pure BaTiO3. In particular an additional doping of at least part of the BaTiO3 with barium leads to a material whose Curie temperature and saturation polarization are substantially higher and whose coercitive field strength is substantially smaller, so that a gas discharge lamp with a coupling structure manufactured from this material can be operated at substantially higher temperatures and at a lower operating voltage. Various dopings of the BaTiO3 with titanium, manganese, and lead are furthermore described.
    Type: Application
    Filed: May 7, 2002
    Publication date: November 21, 2002
    Inventors: Wilhelm Albert Groen, Petra Huppertz, Knuth Albertsen, Bernd Rausenberger
  • Publication number: 20020093782
    Abstract: The dielectric composition contains a mixture of a ceramic composition containing BaaREbTicO3, wherein RE represents a rare earth element, with 0.05≦a≦0.25, 0.525≦b≦0.70, 0.85≦c≦1.0, and 2a+3b+4c=6, and free from lead and bismuth, a glass composition, and a metal oxide. The glass composition preferably contains ZnO or MgO, SiO2, and at least 10% by weight of Li2O or TiO2. Preferably, the alkaline earth metal oxide is MgO. By preference, the glass composition essentially consists of 50-80% weight of SiO2, 5-25% weight of MgO, and optionally another alkaline earth metal oxide, and 10-25% by weight of Li2O, and is substantially free from boron. The dielectric composition can be sintered in the presence of Cu electrodes at a temperature below the melting point of Cu so as to manufacture an electronic device such as a ceramic multilayer element. After sintering, the dielectric composition has a relative dielectric constant of at least 55.
    Type: Application
    Filed: August 7, 2001
    Publication date: July 18, 2002
    Inventors: Ronald Mikkenie, Gerardus Christiaan Marie Dortant, Knuth Albertsen, Heinz Georg Kohler, Tilman Schlenker
  • Patent number: 5790367
    Abstract: A capacitor having a ceramic dielectric and at least two electrodes, the ceramic dielectric being predominantly composed of a dielectric, ceramic composition having a main component of BaTiO.sub.3 and/or ?Ba.sub.1-y Sr.sub.y !Ti.sub.x O.sub.31 z, wherein 0.95.ltoreq.x.ltoreq.0.995, 0.ltoreq.y.ltoreq.0.04, z=2(1-x), and having at least an additive of the group formed by XMnO.sub.3, X.sub.2 MoO.sub.6, X.sub.2 WO.sub.6, X.sub.2 SiO.sub.5 +Mn.sub.2 SiO.sub.4 and Li.sub.2 SiO.sub.3 +Mn.sub.2 SiO.sub.4, and at least an additive of the group formed by Li.sub.2 SiO.sub.3, SiO.sub.2 and a mixture of 6 mol % Li.sub.2 O, 13 mol % BaO, 13 mol % SrO, 13 mol % MgO and 55 mol % SiO.sub.2, which is calcined at 800.degree. C., and, if necessary, an additive of the group formed by XInO.sub.3, XGaO.sub.3 and XAlO.sub.3, wherein X is one or more elements of the group formed by Y, Dy and Er, is characterized by a flat .DELTA.C/.DELTA.t curve and a stable dielectric behavior on exposure to temperature and voltage influences.
    Type: Grant
    Filed: December 10, 1996
    Date of Patent: August 4, 1998
    Assignee: U.S. Philips Corporation
    Inventors: Dieter Mateika, Petra Huppertz, Knuth Albertsen, Oliver Steigelmann