Patents by Inventor Mohammed H. Megherhi
Mohammed H. Megherhi 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: 10562809Abstract: A low K value, high Q value, low firing dielectric material and method of forming a fired dielectric material. The dielectric material can be fired below 950° C. or below 1100° C., has a K value of less than about 8 at 10-30 GHz and a Q value of greater than 500 or greater than 1000 at 10-30 GHz. The dielectric material includes, before firing a solids portion including 10-95 wt % or 10-99 wt % silica powder and 5-90 wt % or 1-90 wt % glass component. The glass component includes 50-90 mole % SiO2, 5-35 mole % or 0.1-35 mole % B2O3, 0.1-10 mole % or 0.1-25 mole % Al2O3, 0.1-10 mole % K2O, 0.1-10 mole % Na2O, 0.1-20 mole % Li2O, 0.1-30 mole % F. The total amount of Li2O+Na2O+K2O is 0.1-30 mole % of the glass component. The silica powder can be amorphous or crystalline.Type: GrantFiled: November 5, 2018Date of Patent: February 18, 2020Assignee: Ferro CorporationInventors: Cody J. Gleason, John J. Maloney, Srinivasan Sridharan, George E. Sakoske, Peter Marley, Mohammed H. Megherhi, Yie-Shein Her, Orville W. Brown, Jackie D. Davis, Thomas J. Coffey, Ellen S. Tormey, Stanley Wang, David L. Widlewski
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Patent number: 10544332Abstract: A slurry composition for use in chemical-mechanical polishing sapphire substrates and includes an alkaline pH adjuster and an accelerant.Type: GrantFiled: July 18, 2016Date of Patent: January 28, 2020Assignee: Ferro CorporationInventors: Mohammed H. Megherhi, Nathaniel D. Urban, Yie Shein Her
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Publication number: 20190135683Abstract: A low K value, high Q value, low firing dielectric material and method of forming a fired dielectric material. The dielectric material can be fired below 950° C. or below 1100° C., has a K value of less than about 8 at 10-30 GHz and a Q value of greater than 500 or greater than 1000 at 10-30 GHz. The dielectric material includes, before firing a solids portion including 10-95 wt % or 10-99 wt % silica powder and 5-90 wt % or 1-90 wt % glass component. The glass component includes 50-90 mole % SiO2, 5-35 mole % or 0.1-35 mole % B2O3, 0.1-10 mole % or 0.1-25 mole % Al2O3, 0.1-10 mole % K2O, 0.1-10 mole % Na2O, 0.1-20 mole % Li2O, 0.1-30 mole % F. The total amount of Li2O+Na2O+K2O is 0.1-30 mole % of the glass component. The silica powder can be amorphous or crystalline.Type: ApplicationFiled: November 5, 2018Publication date: May 9, 2019Inventors: Cody J. Gleason, John J. Maloney, Srinivasan Sridharan, George E. Sakoske, Peter Marley, Mohammed H. Megherhi, Yie-Shein Her, Orville W. Brown, Jackie D. Davis, Thomas J. Coffey, Ellen S. Tormey, Stanley Wang, David L. Widlewski
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Publication number: 20170204293Abstract: A slurry composition for use in chemical-mechanical polishing sapphire substrates and includes an alkaline pH adjuster and an accelerant.Type: ApplicationFiled: July 18, 2016Publication date: July 20, 2017Inventors: Mohammed H. MEGHERHI, Nathaniel D. URBAN, Yie Shein HER
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Patent number: 8114801Abstract: Multilayer ceramic chip capacitors which satisfy COG 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 strontium zirconate matrix doped with other metal oxides such as TiO2, MgO, B2O3, CaO, Al2O3, SiO2, and SrO in various combinations.Type: GrantFiled: November 15, 2010Date of Patent: February 14, 2012Assignee: Ferro CorporationInventors: Walter J. Symes, Jr., Mohammed H. Megherhi, Elisabeth W. J. Römer, Mike S. H. Chu, Willibrordus J. L. M. J. Coppens
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Publication number: 20110090619Abstract: Multilayer ceramic chip capacitors which satisfy COG 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 strontium zirconate matrix doped with other metal oxides such as TiO2, MgO, B2O3, CaO, Al2O3, SiO2, and SrO in various combinations.Type: ApplicationFiled: November 15, 2010Publication date: April 21, 2011Applicant: FERRO CORPORATIONInventors: Walter J. Symes, JR., Mohammed H. Megherhi, Elisabeth W. J. Römer, Mike S. H. Chu, Willibrordus J. L. M. J. Coppens
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Patent number: 7858548Abstract: Multilayer ceramic chip capacitors which satisfy COG 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 strontium zirconate matrix doped with other metal oxides such as TiO2, MgO, B2O3, CaO, Al2O3, SiO2, and SrO in various combinations.Type: GrantFiled: September 13, 2006Date of Patent: December 28, 2010Assignee: Ferro CorporationInventors: Walter J. Symes, Jr., Mohammed H. Megherhi, Elisabeth W. J. Römer, Mike S. H. Chu, Willibrordus J. L. M. J. Coppens
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Publication number: 20080063881Abstract: Multilayer ceramic chip capacitors which satisfy COG 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 strontium zirconate matrix doped with other metal oxides such as TiO2, MgO, B2O3, CaO, Al2O3, SiO2, and SrO in various combinations.Type: ApplicationFiled: September 13, 2006Publication date: March 13, 2008Inventors: Walter J. Symes, Mohammed H. Megherhi, Elisabeth W.J. Romer, Mike S.H. Chu, Wilibrordus 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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Patent number: 7161795Abstract: Multilayer ceramic chip capacitors which satisfy COG requirements and which are compatible with reducing atmosphere sintering conditions so that non-noble metals such as copper and copper 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 composite oxide formed by calcining rare earth titanates, barium titanate, together with other metal oxides such as MgO, CaO, ZnO, MnO2, ZrO2, SiO2, Ga2O3, Nd2O3, Nb2O5, and Y2O3.Type: GrantFiled: September 26, 2005Date of Patent: January 9, 2007Assignee: Ferro CorporationInventors: Mohammed H. Megherhi, Walter J. Symes, Jr., Mike S. H. Chu