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).
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Patent number: 9847176Abstract: 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: GrantFiled: February 19, 2015Date of Patent: December 19, 2017Assignee: KNOWLES (UK) LIMITEDInventors: Knuth Albertsen, Angela Ellmore
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Publication number: 20170069427Abstract: 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: ApplicationFiled: February 19, 2015Publication date: March 9, 2017Inventors: Knuth Albertsen, Angela Ellmore
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Patent number: 7727922Abstract: 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: GrantFiled: May 4, 2009Date of Patent: June 1, 2010Assignee: Ferro CorporationInventors: Gerhardus W. Koebrugge, Knuth Albertsen, Willibrordus J. L. M. J. Coppens
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Publication number: 20090213527Abstract: 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: ApplicationFiled: May 4, 2009Publication date: August 27, 2009Applicant: FERRO CORPORATIONInventors: Gerhardus W. Koebrugge, Knuth Albertsen, Willibrordus J. L. M. J. Coppens
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Patent number: 7541306Abstract: 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: GrantFiled: January 17, 2007Date of Patent: June 2, 2009Assignee: Ferro CorporationInventors: Gerhardus W. Koebrugge, Knuth Albertsen, Willibrordus J. L. M. J. Coppens
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Publication number: 20080169530Abstract: 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: ApplicationFiled: January 17, 2007Publication date: July 17, 2008Applicant: FERRO CORPORATIONInventors: Gerhardus W. Koebrugge, Knuth Albertsen, Willibrordus J. L. M. J. Coppens
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Patent number: 7230817Abstract: 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: GrantFiled: April 15, 2005Date of Patent: June 12, 2007Assignee: Ferro CorporationInventors: Mohammed H. Megherhi, Mike S. H. Chu, Daniel E. McCauley, Elizabeth W. Römer, Willibrordus J. Coppens, Knuth Albertsen
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Publication number: 20060232910Abstract: 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: ApplicationFiled: April 15, 2005Publication date: October 19, 2006Applicant: Ferro CorporationInventors: Mohammed Megherhi, Mike Chu, Daniel McCauley, Elisabeth Romer, Willibrordus Coppens, Knuth Albertsen
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Patent number: 7041615Abstract: 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: GrantFiled: August 2, 2004Date of Patent: May 9, 2006Assignee: Koninkiljke Philips Electronics N.V.Inventors: Ronald Mikkenie, Gerardus Christiaan Marie Dortant, Knuth Albertsen, Heinz Georg Kohler, Tilman Schlenker
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Publication number: 20050009685Abstract: 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: ApplicationFiled: August 2, 2004Publication date: January 13, 2005Inventors: Ronald Mikkenie, Gerardus Dortant, Knuth Albertsen, Heinz Kohler, Tilman Schlenker
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Patent number: 6797661Abstract: 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: GrantFiled: August 7, 2001Date of Patent: September 28, 2004Assignee: Koninklijke Philips Electronics N.V.Inventors: Ronald Mikkenie, Gerardus Christiaan Marie Dortant, Knuth Albertsen, Heinz Georg Kohler, Tilman Schlenker
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Patent number: 6744204Abstract: 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: GrantFiled: May 7, 2002Date of Patent: June 1, 2004Assignee: Koninklijke Philips Electronics N.V.Inventors: Wilhelm Albert Groen, Petra Huppertz, Knuth Albertsen, Bernd Rausenberger
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Patent number: 6721164Abstract: 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: GrantFiled: April 16, 2001Date of Patent: April 13, 2004Assignee: Koninklijke Philips Electronics N.V.Inventors: Knuth Albertsen, Wilhelm-Albert Groen, Tilman Schlenker
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Patent number: 6713946Abstract: 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: GrantFiled: May 30, 2002Date of Patent: March 30, 2004Assignee: Koninklijke Philips Electronics N.V.Inventors: Wilhelm Albert Groen, Knuth Albertsen, Bernd Rausenberger
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Publication number: 20020195927Abstract: 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 compositionType: ApplicationFiled: May 30, 2002Publication date: December 26, 2002Inventors: Wilhelm Albert Groen, Knuth Albertsen, Bernd Rausenberger
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Publication number: 20020171375Abstract: 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: ApplicationFiled: May 7, 2002Publication date: November 21, 2002Inventors: Wilhelm Albert Groen, Petra Huppertz, Knuth Albertsen, Bernd Rausenberger
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Publication number: 20020093782Abstract: 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: ApplicationFiled: August 7, 2001Publication date: July 18, 2002Inventors: Ronald Mikkenie, Gerardus Christiaan Marie Dortant, Knuth Albertsen, Heinz Georg Kohler, Tilman Schlenker
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Patent number: 5790367Abstract: 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: GrantFiled: December 10, 1996Date of Patent: August 4, 1998Assignee: U.S. Philips CorporationInventors: Dieter Mateika, Petra Huppertz, Knuth Albertsen, Oliver Steigelmann