And Trivalent Metal Oxide Patents (Class 501/139)
  • Patent number: 10879008
    Abstract: A ceramic capacitor includes: a multilayer structure in which each of a plurality of dielectric layers and each of a plurality of internal electrode layers are alternately stacked, wherein a main component of the plurality of dielectric layers is ceramic having a perovskite structure expressed by BamTiO3 (0.9990?m?1.0015), wherein the plurality of dielectric layers include Mn as a first sub-component, Mg as a second sub-component, a rare earth element which is at least one of Ho and Dy as a third sub-component, V as a fourth sub-component, Si as a fifth sub-component, Ca as a sixth sub-component, wherein an average grain diameter of ceramic grains of the plurality of dielectric layers is 280 nm or more and 380 nm or less.
    Type: Grant
    Filed: January 17, 2019
    Date of Patent: December 29, 2020
    Assignee: TAIYO YUDEN CO., LTD.
    Inventor: Kazumi Kaneda
  • Patent number: 10811192
    Abstract: Multilayer ceramic capacitor structures may include structural arrangements, materials, and/or substrate modifications that can improve the reliability of the capacitor for long-term usage when faced with environmental stress. Embodiments may implement reduced entryways in the termination patterns of the capacitor to decrease damage potential due to exposure of moisture. Embodiments may implement structures that decrease interfaces with different physical characteristics, which may lead to a reduction in the formation of micro-fractures during regular usage. Methods of manufacture for the features that improve reliability are also detailed.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: October 20, 2020
    Assignee: Apple Inc.
    Inventors: Paul A. Martinez, Won Seop Choi, Gang Ning, Chirag V. Shah, Martin Schauer, Curtis C. Mead, Ming Yuan Tsai, Albert Wang
  • Patent number: 10673143
    Abstract: An antenna structure (GPS antenna) includes a plate-shaped conductor element (antenna electrode), a plate-shaped element (circuit board) including a ground conductor portion disposed so as to overlap the conductor element in plan view, and a skeletal resin frame for frequency adjustment disposed between the conductor element and the ground conductor portion.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: June 2, 2020
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Seiji Osawa, Tadashi Aizawa
  • Patent number: 10600572
    Abstract: A multilayer ceramic capacitor includes: a ceramic body including dielectric layers and first and second internal electrodes disposed to face each other with respective dielectric layers interposed therebetween; and first and second external electrodes disposed on an external surface of the ceramic body, wherein the dielectric layer contains a barium titanate-based powder particle having a core-shell structure including a core and a shell around the core, the shell having a structure in which titanium is partially substituted with an element having the same oxidation number as that of the titanium in the barium titanate-based powder particle and having an ionic radius different from that of the titanium in the barium titanate-based powder particle, and the shell covers at least 30% of a surface of the core.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: March 24, 2020
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Jin Woo Kim, Jong Ho Lee, Min Gi Sin, Hak Kwan Kim, Chin Mo Kim, Chi Hwa Lee, Hong Seok Kim, Woo Sup Kim, Chang Hwa Park
  • Patent number: 10580575
    Abstract: A multilayer ceramic capacitor includes: a ceramic body including dielectric layers and first and second internal electrodes disposed to face each other with respective dielectric layers interposed therebetween; and first and second external electrodes disposed on an external surface of the ceramic body, wherein the dielectric layer contains a barium titanate-based powder particle having a core-shell structure including a core and a shell around the core, the shell having a structure in which titanium is partially substituted with an element having the same oxidation number as that of the titanium in the barium titanate-based powder particle and having an ionic radius different from that of the titanium in the barium titanate-based powder particle, and the shell covers at least 30% of a surface of the core.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: March 3, 2020
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Jin Woo Kim, Jong Ho Lee, Min Gi Sin, Hak Kwan Kim, Chin Mo Kim, Chi Hwa Lee, Hong Seok Kim, Woo Sup Kim, Chang Hwa Park
  • Patent number: 10431383
    Abstract: A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode containing a base metal and coupled to one of the pair external electrodes; a dielectric layer stacked on the first internal electrode and containing a ceramic material and the base metal; and a second internal electrode stacked on the dielectric layer, containing the base metal, and coupled to another one of the external electrodes, wherein a concentration of the base metal in each of five regions, which are equally divided regions of a region between locations 50 nm away from the first and second internal electrodes in a stacking direction between the first and second internal electrodes, is within ±20% of an average of the concentrations of the base metal in the five regions, and thicknesses of the first internal electrode and the second internal electrode are 0.2 ?m or greater.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: October 1, 2019
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Koichiro Morita, Katsuya Taniguchi, Minoru Ryu, Yoshiki Iwazaki
  • Patent number: 10431384
    Abstract: A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode containing a base metal and coupled to one of the external electrodes; a dielectric layer stacked on the first internal electrode and containing the base metal and a ceramic material mainly composed of barium titanate; and a second internal electrode stacked on the dielectric layer, containing the base metal, and coupled to another one of the external electrodes, wherein a concentration of the base metal in each of five regions, which are equally divided regions between locations 50 nm away from the first and second internal electrodes in a stacking direction between the first and second internal electrodes, is within ±20% of an average of the concentrations of the base metal in the five regions, and an atomic concentration ratio of Mg to Ti is 0 or greater and less than 0.002 in the dielectric layer.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: October 1, 2019
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Koichiro Morita, Katsuya Taniguchi, Minoru Ryu, Yoshiki Iwazaki
  • Patent number: 10418178
    Abstract: A multilayer ceramic capacitor includes: a ceramic body including dielectric layers and first and second internal electrodes disposed to face each other with respective dielectric layers interposed therebetween; and first and second external electrodes disposed on an external surface of the ceramic body, wherein the dielectric layer contains a barium titanate-based powder particle having a core-shell structure including a core and a shell around the core, the shell having a structure in which titanium is partially substituted with an element having the same oxidation number as that of the titanium in the barium titanate-based powder particle and having an ionic radius different from that of the titanium in the barium titanate-based powder particle, and the shell covers at least 30% of a surface of the core.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: September 17, 2019
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Jin Woo Kim, Jong Ho Lee, Min Gi Sin, Hak Kwan Kim, Chin Mo Kim, Chi Hwa Lee, Hong Seok Kim, Woo Sup Kim, Chang Hwa Park
  • Patent number: 9536666
    Abstract: A multi-layer ceramic capacitor has a laminate of dielectric layers and internal electrode layers laminated alternately with one another, as well as cover layers formed as the outermost layers at the top and bottom of the laminate in the laminating direction, wherein the dielectric layers are constituted by a sintered compact containing a barium titanate and a silicon compound, and a fresnoite phase having an average grain size of 1 ?m or less is present in the dielectric layers.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: January 3, 2017
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Hideya Teraoka, Koichiro Morita, Youichi Mizuno
  • Patent number: 9530562
    Abstract: To provide a dielectric ceramic composition having a high dielectric constant, i.e., 3,000 or more, at elevated temperatures at or above 150° C. and having a practically sufficient relative dielectric constant at an applied DC electric field of 2 V/?m, and to provide a dielectric device including such a dielectric ceramic composition, a dielectric ceramic composition is a composite oxide represented by formula (1): {[(BisNat)a(BiuKv)bBac]1-dNad}xTi1-dNbdO3??(1) where a, b, c, d, s, t, u, v, and x are numbers satisfying the following conditions: 0.20?a<0.95 0.00<b?0.50 if 0.20<a<0.70, b<(1.20?a)/2 0.05?c<0.60 if 0.20<a<0.70, c>(0.80?a)/2 a+b+c=1 0.02?d<0.10 0.90?s+u?1.00 0.45?t?0.50 0.45?v?0.50 0.95?x?1.05.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: December 27, 2016
    Assignee: TDK CORPORATION
    Inventors: Goushi Tauchi, Tomoya Imura, Masahito Furukawa
  • Patent number: 9530563
    Abstract: The present invention relates to a dielectric ceramic composition which is complex oxides represented by the following formula (1), {[(BisNat)a(BiuKv)bBac]1-dAd}xTi1-dNbdO3 (1), wherein, in formula (1), A represents at least one element selected from the group consisting of Li, Na and K, and a, b, c, d, s, t, u, v and x are numbers respectively satisfying the following formulae, 0.10?a?0.95, 0.00<b?0.85, 0.05?c?0.70, a+b+c=1, 0.10?d?0.50, 0.90?s+u?1.00, 0.45?t?0.50, 0.45?v?0.50 and 0.95?x?1.05.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: December 27, 2016
    Assignee: TDK CORPORATION
    Inventors: Tomoya Imura, Goushi Tauchi, Masahito Furukawa
  • Patent number: 9330845
    Abstract: A dielectric composition may include a first dielectric powder; and a second dielectric powder having an average grain size smaller than that of the first dielectric powder and included in the dielectric composition in an amount of 0.01 to 1.5 parts by weight based on 100 parts by weight of the first dielectric powder, and a multilayer ceramic capacitor formed using the same. A multilayer ceramic capacitor may include: a ceramic body including dielectric layers; first and second internal electrodes disposed in the ceramic body to face each other with the respective dielectric layers interposed therebetween; and first and second external electrodes electrically connected to the first and second internal electrodes, respectively. The dielectric layers are formed of a dielectric composition including a first dielectric powder and a second dielectric powder having an average grain size smaller than that of the first dielectric powder and included in the dielectric composition in an amount of 0.01 to 1.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: May 3, 2016
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Jae Sung Park, Sang Hyuk Kim, Chan Hee Nam, Chang Hoon Kim, Seok Hyun Yoon, Doo Young Kim
  • Patent number: 9255035
    Abstract: A dielectric ceramic composition may include: a base powder represented by BaTiO3 and accessory components. In an XRD measurement of a dielectric material in which the base powder and the accessory components are sintered, when a (1, 1, 0) plane peak of a BaTiO3 crystal phase is converted into 1.00, a secondary phase peak of pyrochlore (RE2Ti2O7) (RE is a rare earth element) at about 30.5 degrees, as compared with the (1, 1, 0) plane peak, is 0.01 or less.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: February 9, 2016
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Seok Hyun Yoon, Song Je Jeon, Soo Kyong Jo, Doo Young Kim, Chang Hoon Kim
  • Patent number: 9162922
    Abstract: A glass ceramic composition that contains a first ceramic including at least one of MgAl2O4 and Mg2SiO4; a second ceramic including BaO, RE2O3 (RE is a rare-earth element), and TiO2; glass containing each of 44.0 to 69.0 weight % of RO (R is an alkaline-earth metal), 14.2 to 30.0 weight % of SiO2, 10.0 to 20.0 weight % of B2O3, 0.5 to 4.0 weight % of Al2O3, 0.3 to 7.5 weight % of Li2O, and 0.1 to 5.5 weight % of MgO; and MnO.
    Type: Grant
    Filed: November 11, 2013
    Date of Patent: October 20, 2015
    Inventors: Kazuhiro Kaneko, Sadaaki Sakamoto, Hiroshige Adachi, Satoru Adachi, Seiji Fujita
  • Patent number: 9111683
    Abstract: A dielectric ceramic that contains, as its main constituent, main-phase grains including a perovskite-type compound containing Ba, Ca, and Ti; first heterogeneous-phase grains containing Ca, a rare-earth element, and Si; and second heterogeneous-phase grains containing no Ca and containing the rare-earth element and Si. The second heterogeneous-phase grains are present in the dielectric ceramic in a ratio of 0.05 or less (including 0) of the number of the second heterogeneous-phase grains to the total of the first heterogeneous-phase grains and the second heterogeneous-phase grains. In the first heterogeneous-phase grains, the content of Ca is preferably 8% or more in terms of molar ratio with respect to the total content of Ca, the rare-earth element, and Si.
    Type: Grant
    Filed: September 10, 2013
    Date of Patent: August 18, 2015
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Shinichi Yamaguchi
  • Publication number: 20150098166
    Abstract: There are provided a dielectric composition and a multilayer ceramic electronic component manufactured using the same, the dielectric composition including a dielectric grain having a perovskite structure represented by ABO3, wherein, when an imaginary line is drawn in a direction from a center of the dielectric grain to a grain boundary thereof, a content of rare earth elements in a region corresponding to 0.75 to 0.95% of the dielectric grain from the center of the dielectric grain may be 0.5 to 2.5 at %, based on 100 at % of a B-site ion, so that the multilayer ceramic electronic component manufactured using the dielectric composition can have excellent reliability and secure a high dielectric constant.
    Type: Application
    Filed: December 16, 2014
    Publication date: April 9, 2015
    Inventors: Sung Hyung Kang, Doo Young Kim, Chang Hak Choi
  • Publication number: 20150065332
    Abstract: A framework for developing high quality factor (Q) material for electronic applications in the radio frequency range is provided. In one implementation, ceramic materials having a tungsten bronze crystal structure is modified by substituting one or more elements at one or more lattice sites on the crystal structure. The substitute elements are selected based on the ionic radius and other factors. In other implementations, the modified ceramic material is prepared in combination with compositions such as rutile or a perovskite to form a orthorhombic hybrid of perosvkite and tetragonal tungsten bronze.
    Type: Application
    Filed: September 10, 2014
    Publication date: March 5, 2015
    Inventor: Michael David Hill
  • Patent number: 8962506
    Abstract: There is provided a dielectric composition, including: a base powder including BamTiO3, where 0.995?m?1.010; a first subcomponent including 0.1 to 1.0 at % (x) of an oxide or carbonate containing at least one variable-valence acceptor element based on 100 moles of the base powder; a second subcomponent including 0.01 to 3.0 at % (y) of an oxide or carbonate containing at least one fixed valence acceptor element; a third subcomponent including an oxide or carbonate containing cerium (z) at % and at least one other rare-earth element (w) at %, where 0.01?z?x+4y and 0.01?z+w?x+4y; a fourth subcomponent including at least one of an oxide or carbonate containing at least one of Barium, Calcium, Aluminum, and Silicon and glass containing silicon; and a fifth subcomponent including 0.01 to 10.0 at % of an oxide containing zirconium.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: February 24, 2015
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Kyu Ree Kim, Seok Hyun Yoon, Sun Ho Yoon, Chang Hoon Kim
  • Patent number: 8946104
    Abstract: A dielectric ceramic whose primary component is an ABO3 compound (A contains Ba and B contains Ti) has a per-layer thickness of approx. 0.5 ?m or less, where the volume ratio to all dielectric sintered grains of those whose grain size is in a range of 0.02 ?m to 0.15 ?m is adjusted to a grain size distribution of 1% to 10%. High dielectric constant and high reliability can be achieved at the same time with the dielectric ceramic.
    Type: Grant
    Filed: June 19, 2013
    Date of Patent: February 3, 2015
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Yukihiro Konishi, Yusuke Kowase, Kazumichi Hiroi, Kotaro Mizuno, Ayumu Sato
  • Publication number: 20150029637
    Abstract: There is provided a dielectric composition for low-temperature sintering including BaTiO3 as a main ingredient, and xB2O3-(1-x)BaOas an accessory ingredient, wherein x ranges from 0.25 to 0.8, and the content of the accessory ingredient ranges from 0.1 to 2.00 mol %, based on 100 mol % of the main ingredient.
    Type: Application
    Filed: October 29, 2013
    Publication date: January 29, 2015
    Inventors: Jong Bong LIM, Seok Hyun YOON, Doo Young KIM, Sang Huk KIM
  • Patent number: 8916489
    Abstract: A dielectric ceramic composition for multilayer ceramic capacitor (MLCC) includes a first component of 91 to 98 wt % and a second component of 2 to 9 wt %, wherein the first component includes a main component BaTiO3 of 94 to 98 wt %, a first subcomponent of 0.5 to 2 wt % including a glass powder having a network structure, and a second subcomponent of 1 to 4 wt % including at least one of MgO, Cr2O3 and Mn3O4, and the second component includes (Ba1-y-xCaySrx)(ZryTi1-y)O3, and x satisfies 0.2?x?0.8 and y satisfies 0.03?y?0.15.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: December 23, 2014
    Assignee: Samhwa Capacitor Co., Ltd.
    Inventors: Young Joo Oh, Jung Rag Yoon, Byong Chul Woo
  • Patent number: 8908353
    Abstract: A laminated ceramic capacitor has multiple layered dielectric ceramic layers of a dielectric ceramic constituted by primary phase grains whose primary component is BaTiO3, secondary phase grains containing at least Re (Re represents at least one of Eu, Gd, Dy, Ho, Er, Yb, and Y), Ba, and Ti, and grain boundary phase containing at least one of B and Li or both; and internal electrodes which are made of Cu or Cu alloy. When a thickness of the dielectric ceramic layer is given by t, and when grain sizes at cumulative 20%, cumulative 50%, and cumulative 95% points of a cumulative count distribution of the primary phase grains are given by D20, D50, and D95, respectively, D20?D50×70%, D50?t/4, D95?t/2, and CV value ((standard deviation between D20 and D95)/D50)<40% are satisfied.
    Type: Grant
    Filed: September 26, 2011
    Date of Patent: December 9, 2014
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Kenji Takashima, Shinsuke Takeoka
  • Patent number: 8906818
    Abstract: Dielectric compositions that include compound of the formula [(M?)1?x(A?)x][(M?)1?y?z,(B?)y(C?)z]O3??(VO)? and protonated dielectric compositions that include a protonated dielectric compound within the formula [(M?)1?x(A?)x](M?)1?y?z(B?)y(C?)z]O3??+h(Vo)?(H•)2h are disclosed. Composite materials that employ one or more of these dielectric compounds together with an electrolyte also are disclosed. Composite material that employs one or more of these dielectric compounds together with an electrochemally active material also are disclosed.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: December 9, 2014
    Assignees: Recapping, Inc., Penn State Research Foundation
    Inventors: Clive A. Randall, Leslie E. Cross, Aram Yang, Niall J. Donnelly, Ramakrishnan Rajagopalan, Amanda Lou Baker
  • Publication number: 20140336035
    Abstract: An insulator for spark plug with a main constituent of alumina and containing silicon includes a grain boundary phase positioned between alumina particles. The grain boundary phase contains: a group 2A element; a rare earth element; and at least one kind of zirconium, titanium, chrome, niobium, manganese, and iron (a first element). Assuming that a total amount of the rare earth element is X (mass %), a total amount of the group 2A element is Y (mass %), and a total amount of the first element is Z (mass %), the following are met: 0.40?Y/X?2.00 0.10?Z/X?0.40.
    Type: Application
    Filed: May 8, 2014
    Publication date: November 13, 2014
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Katsuya TAKAOKA, Yutaka YOKOYAMA, Kengo FUJIMURA, Hironori UEGAKI, Hiroki TAKEUCHI, Hirokazu KURONO, Toshitaka HONDA, Kuniharu TANAKA, Takeshi MITSUOKA
  • Publication number: 20140313634
    Abstract: A dielectric composition includes a base main component including Ba and Ti and an accessory component, wherein a ratio of domain width/grain size of the dielectric composition is in the range of 0 to 0.2, a multilayer ceramic capacitor using the same, and a method for manufacturing a multilayer ceramic capacitor. It is possible to provide a dielectric composition that can implement a higher dielectric constant and good high temperature withstand voltage characteristics in the same grain size condition. It is expected that this effect can be effectively applied to the development of ultra high capacity MLCCs having a thin dielectric by implementing the same capacity while increasing the thickness of the dielectric than the case of applying the conventional dielectric material.
    Type: Application
    Filed: October 3, 2013
    Publication date: October 23, 2014
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Seok Hyun YOON, Jong Bong Lim, Jae Sung Park, Doo Young Kim, Chang Hoon Kim
  • Patent number: 8846556
    Abstract: A piezoelectric ceramic that includes barium titanate and 0.04 mass % or more and 0.20 mass % or less manganese relative to barium titanate. The piezoelectric ceramic is composed of crystal grains. The crystal grains include crystal grains A having an equivalent circular diameter of 30 ?m or more and 300 ?m or less and crystal grains B having an equivalent circular diameter of 0.5 ?m or more and 3 ?m or less. The crystal grains A and the crystal grains B individually form aggregates and the aggregates of the crystal grains A and the aggregates of the crystal grains B form a sea-island structure.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: September 30, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Makoto Kubota, Tatsuo Furuta, Hiroshi Saito, Toshihiro Ifuku, Kenichi Takeda, Tetsuro Fukui
  • Patent number: 8846210
    Abstract: A ceramic electronic component includes a first dielectric layer, a second dielectric layer, and a boundary reaction layer. The first dielectric layer is a layer containing BaO, Nd2O3, and TiO2, the second dielectric layer is a layer containing a material different from the material of the first dielectric layer, and the boundary reaction layer is a layer formed between the first dielectric layer and the second dielectric layer and containing at least one of Zn, Ti, Cu, and Mg.
    Type: Grant
    Filed: February 4, 2011
    Date of Patent: September 30, 2014
    Assignee: TDK Corporation
    Inventors: Toshio Sakurai, Hisashi Kobuke, Tomohiro Arashi, Kiyoshi Hatanaka, Yasuharu Miyauchi
  • Patent number: 8841226
    Abstract: A dielectric ceramic composition includes a component represented by composition formula {?(xBaO.yNd2O3.zTiO2)+?(2MgO.SO2)} as a main component and zinc oxide, boron oxide, and a glass having a softening point equal to or lower than a certain temperature as minor components with respect to the main component. In the dielectric ceramic composition, x, y, and z that respectively represent molar ratios of BaO, Nd2O3, and TiO2 are in certain ranges and ? and ? that represent volume ratios of subcomponents (xBaO.yNd2O3.zTiO2 and 2MgO.SiO2) in the main component are in certain ranges. When the minor components are respectively represented by aZnO, bB2O3, and cglass, a, b, and c that represent mass ratios of the respective minor components to the main component are in certain ranges.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: September 23, 2014
    Assignee: TDK Corporation
    Inventors: Raitarou Masaoka, Toshio Sakurai, Tomohiro Arashi, Kyung-Ku Choi, Kiyoshi Hatanaka
  • Patent number: 8841225
    Abstract: A dielectric ceramic that includes a sintered body of BaTiO3 based ceramic grains, in which the ceramic grains each include a shell part as a surface layer part and a core part inside the shell part. The ceramic grains contain, as accessory constituents, R (R, which is a rare-earth element, is at least one selected from the group consisting of Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, and Y) and M (M is at least one selected from the group consisting of Mg, Mn, Ni, Co, Fe, Cr, Cu, Al, Mo, W, and V). R and M are present in the shell part of the ceramic grain, and concentrations of R and M contained in the shell part are increased from a grain boundary toward the core part.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: September 23, 2014
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Tomomi Koga, Koichi Banno
  • Publication number: 20140268484
    Abstract: A dielectric ceramic composition includes: a base material powder BamTiO3 (0.995?m?1.010); 0.2 to 2.0 moles of a first accessory ingredient, an oxide or carbide containing at least one of Ba and Ca, based on 100 moles of the base material powder; a second accessory ingredient, an oxide containing Si or a glass compound containing Si; 0.2 to 1.5 moles of a third accessory ingredient, an oxide containing at least one of Sc, Y, La, Ac, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, based on 100 moles of the base material powder; and 0.05 to 0.80 mole of a fourth accessory ingredient, an oxide containing at least one of Cr, Mo, W, Mn, Fe, Co, and Ni, based on 100 moles of the base material powder, a content ratio of the first accessory ingredient to the second accessory ingredient being 0.5 to 1.7.
    Type: Application
    Filed: June 21, 2013
    Publication date: September 18, 2014
    Inventors: Sung Hyung KANG, Du Won CHOI, Ki Yong LEE, Jae Hun CHOE, Min Sung SONG
  • Publication number: 20140179826
    Abstract: The invention provides a modified perovskite type composite oxide in which the particle surface of a perovskite type composite oxide is coated with a first component of at least one selected from TiO2 and SiO2 and a second component of at least one selected from a group consisting of Al, Zr, Nd, La, Ce, Pr, and Sm, wherein the coating is formed by hydrolyzing at least one selected from a hydrolyzable TiO2 precursor and a hydrolyzable SiO2 precursor as a source of the first component and a salt of at least one selected from a group consisting of Al, Zr, Nd, La, Ce, Pr, and Sm as a source of the second component, and then calcining them.
    Type: Application
    Filed: November 15, 2013
    Publication date: June 26, 2014
    Applicant: Nippon Chemical Industrial Co., Ltd.
    Inventor: Shinji Tanabe
  • Patent number: 8748329
    Abstract: A dielectric ceramic composition that contains, as its main constituent, (Ba1-x-yCaxSry)(Ti1-z-wZrzHfw)O3 (in the formula, 0?x+y?0.2, 0?z+w?0.1), and contains CuO and Bi2O3, and the dielectric ceramic composition has a feature that the total content of the CuO and Bi2O3 is 10 parts by weight or more with respect to 100 parts by weight of the main constituent, and the molar ratio CuO/(CuO+Bi2O3) is 0.5 or less.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: June 10, 2014
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Masanori Nakamura, Masahiro Otsuka, Shoichiro Suzuki, Koichi Banno, Taisuke Kanzaki, Akihiro Shiota
  • Publication number: 20140092526
    Abstract: A dielectric ceramic that contains, as its main constituent, a perovskite-type compound containing Ba and Ti, and, with respect to the Ti content of 100 parts by mole, contains Re1 (Re1 is at least one element of La and Nd) in the range of 0.15 to 3 parts by mole, Y in the range of 0.1 to 3 parts by mole, Mg in the range of 0.3 to 13 parts by mole, and Fe in the range of 0.01 to 5 parts by mole.
    Type: Application
    Filed: December 2, 2013
    Publication date: April 3, 2014
    Applicant: MURATA MANUFACTURING CO.,LTD.
    Inventors: Kazuji Kushiro, Tatsuya Ishikawa, Tomomitsu Yamanishi, Naoki Kawara
  • Patent number: 8673799
    Abstract: A dielectric ceramic composition comprises barium titanate as a main component, and as subcomponents, 1.00 to 2.50 moles of an oxide of Mg, 0.01 to 0.20 mole of an oxide of Mn and/or Cr, 0.03 to 0.15 mole of an oxide of at least one element selected from a group consisting of V, Mo and W, 0.20 to 1.50 mole of an oxide of R1 where R1 is at least one selected from a group consisting of Y and Ho, 0.20 to 1.50 mole of an oxide of R2 where R2 is at least one selected from a group consisting of Eu, Gd and Tb and 0.30 to 1.50 mole of an oxide of Si and/or B, in terms of each oxide with respect to 100 moles of the barium titanate.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: March 18, 2014
    Assignee: TDK Corporation
    Inventors: Jun Sato, Fumiaki Satoh, Saori Takeda, Masakazu Hosono
  • Patent number: 8673798
    Abstract: A dielectric ceramic and a laminated ceramic capacitor using the dielectric ceramic are achieved which provide favorable thermal shock resistance without damaging properties or characteristics such as dielectric properties, insulation properties, temperature characteristics, and characteristics in high temperature loading, even when the dielectric layers are reduced in thickness and the number of stacked layers increased. The dielectric ceramic contains, as its main constituent, a barium titanate based compound represented by the general formula ABO3, and a crystalline oxide containing Al, Mg, and Si is present as secondary phase grains in the dielectric ceramic.
    Type: Grant
    Filed: August 1, 2011
    Date of Patent: March 18, 2014
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Tomoyuki Nakamura
  • Publication number: 20140063686
    Abstract: A dielectric composition having a high dielectric constant, multi layered ceramic condensers comprising the same, and a method of preparing for multi layered ceramic condensers. The dielectric composition includes: a compound represented by general formula (Ba1-XCax)m(Ti1-yZry)O3 (0.995?m?1.010, 0.001?x?0.10, 0.001?y?0.20) as a main component; an Al oxide as a first sub-component; at least one metal selected from a group consisting of Mg, Sr, Ba, Ca, and Zr and the salt thereof, as a second sub-component; at least one metal selected from a group consisting of Sc, Y, La, Ac, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu and the salt thereof, as a third sub-component; at least one metal selected from a group consisting of Cr, Mo, W, Mn, Fe, Co, and Ni and the salt thereof, as a fourth sub-component; and a fifth sub-component selected from Si containing glass forming compounds.
    Type: Application
    Filed: November 8, 2013
    Publication date: March 6, 2014
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Sung Hyung KANG, Min Sung SONG, Du Won CHOI, Sang Hoon KWON, Chang Hoon KIM, Kang Heon HUR
  • Patent number: 8652984
    Abstract: A dielectric ceramic composition comprising a main component and at least one or more subcomponent elements has a dielectric particle and a grain boundary. The dielectric particle has a main component phase substantially composed of the main component, and a diffusive phase around the main component phase where at least one selected from the subcomponent elements is diffused, a local minimal value of Cs is located at an outside edge side with respect to a position of the local maximum value of Cs, and Cs is increased from a position of the local minimal value of Cs toward the outside edge, when the dielectric particle is cut on an arbitrary cutting plane including the main component phase, and Cs is defined as a concentration of one or more elements selected from the subcomponent elements in an arbitrary position in the dielectric particle.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: February 18, 2014
    Assignee: TDK Corporation
    Inventors: Makoto Endo, Osamu Kido, Hirobumi Tanaka, Taisuke Masuko, Yusuke Sato
  • Patent number: 8652983
    Abstract: A hexagonal type barium titanate powder comprising barium titanate as a main component shown by a generic formula of (Ba1-?M?)A(Ti1-?Ga?)BO3 and having hexagonal structure wherein; an effective ionic radius of 12-coordinated “M” is ?25% or more to +25% or less with respect to an effective ionic radius of 12-coordinated Ba2+, and said A, B, ? and ? satisfy relations of 0.975<(A/B)?1.015, 0.0015??<0.005, 0.075???0.15.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: February 18, 2014
    Assignee: TDK Corporation
    Inventors: Shigekazu Hidaka, Tatsuya Ishii, Takeo Tsukada, Hidesada Natsui, Kenichiro Masuda
  • Publication number: 20140009868
    Abstract: A dielectric ceramic that contains, as its main constituent, main-phase grains including a perovskite-type compound containing Ba, Ca, and Ti; first heterogeneous-phase grains containing Ca, a rare-earth element, and Si; and second heterogeneous-phase grains containing no Ca and containing the rare-earth element and Si. The second heterogeneous-phase grains are present in the dielectric ceramic in a ratio of 0.05 or less (including 0) of the number of the second heterogeneous-phase grains to the total of the first heterogeneous-phase grains and the second heterogeneous-phase grains. In the first heterogeneous-phase grains, the content of Ca is preferably 8% or more in terms of molar ratio with respect to the total content of Ca, the rare-earth element, and Si.
    Type: Application
    Filed: September 10, 2013
    Publication date: January 9, 2014
    Applicant: MURATA MANUFACTURING CO., LTD
    Inventor: Shinichi Yamaguchi
  • Publication number: 20140005029
    Abstract: There are provided a method of manufacturing perovskite powder, and perovskite powder and a multilayer ceramic electronic component manufactured thereof. The manufacturing method includes: washing metal oxide hydrate to remove impurities therefrom; adding pure water and an acid or a base to the metal oxide hydrate to prepare a metal oxide sol; mixing the metal oxide sol with a metal salt to form perovskite particle nuclei; and conducting grain growth of the perovskite particle nuclei by hydrothermal treatment to produce perovskite powder. The method of manufacturing perovskite powder and the perovskite powder manufactured by the same have advantages such as excellent crystallinity, reduced generation of fine powder, and favorable dispersion properties.
    Type: Application
    Filed: September 6, 2013
    Publication date: January 2, 2014
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Kum Jin PARK, Sang Hyuk KIM, Hye Young BAEG, Hyung Joon JEON, Sang Hoon KWON, Chang Hak CHOI
  • Patent number: 8618005
    Abstract: Provided are a glass powder represented as aLi2O-bK2O-cBaO-dB2O3-eSiO2wherein a+b+c+d+e=1, and 0.01?a?0.1, 0.01?b?0.1, 0.01?c?0.1, 0.05?d?0.3, and 0.3?e?0.7 are satisfied in terms of mol %, a method of manufacturing the same, and a multi-layered ceramic material using the same. Therefore, a nano glass powder having an average particle size of 100nm or less and uniform particle size distribution can be manufactured using liquid phase deposition, specifically, a sol-gel method. In addition, the glass powder can be used as sintering additives to decrease a sintering temperature by about 100° C. in comparison with conventional glass upon manufacture of a ceramic material such as MLCC and MLCI, which can be sintered at a low temperature, contributing to improvement of dielectric capacity and inductance capacity of the parts and increasing quality coefficient.
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: December 31, 2013
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Sungyong An, Jeongwook Kim, Sungbum Sohn, Jinwoo Hahn, Soonmo Song
  • Patent number: 8609564
    Abstract: A method for manufacturing a laminated ceramic capacitor by firing a laminated body which includes dielectric ceramic layers containing a dielectric ceramic raw material powder and internal electrodes. The firing is carried out in accordance with a temperature profile in which the average rate of temperature rise is 40° C./second or more from room temperature to a maximum temperature. The dielectric ceramic raw material powder contains a BaTiO3 system as its main constituent, and contains R (R is Sc, etc.), M (M is Mn, etc.), and Mg as accessory constituents, in which, when the total amount of the accessory constituents contained is denoted by D parts by mol with respect to 100 parts by mol of the main constituent, an the specific surface area of the main constituent is denoted by E m2/g, then D/E is 0.2 to 0.8.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: December 17, 2013
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Makoto Matsuda, Tomoyuki Nakamura
  • Patent number: 8609017
    Abstract: Electronically tunable dielectric materials having favorable properties are disclosed. The electronically tunable materials include an electronically tunable dielectric phase such as barium strontium titanate in combination with at least two additional metal oxide phases. The additional metal oxide phases may include, for example, oxides of Mg, Si, Ca, Zr, Ti and Al. The electronically tunable materials may be provided in bulk, thin film and thick film forms for use in devices such as phased array antennas, tunable filters and the like. The materials are useful in many applications, including the area of radio frequency engineering and design.
    Type: Grant
    Filed: February 17, 2007
    Date of Patent: December 17, 2013
    Assignee: BlackBerry Limited
    Inventors: Louise C. Sengupta, Xubai Zhang, Luna H. Chiu
  • Patent number: 8592491
    Abstract: A particulate subcomponent for a barium titanate dielectric is obtained from a sol in which a rare earth metal compound is dispersed in water. The rare earth metal compound includes a carboxylic acid having at least three carbonyl groups and at least one rare earth metal which can be Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu so that the molar ratio (carbonyl group/rare earth metal) is in the range of 1.2 to 3. A method of making the sol and a method of using the sol to make a ceramic powder is described.
    Type: Grant
    Filed: September 15, 2009
    Date of Patent: November 26, 2013
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takashi Hasegawa, Yasunari Nakamura, Kazunari Okada
  • Patent number: 8592335
    Abstract: A dielectric ceramic composition contains a barium titanate based composite oxide as its main constituent, and contains a first accessory constituent including at least Al and a second accessory constituent including one or more elements selected from among Fe, Co, Ni, Cu, and Zn, wherein the content of the Al is 0.02 to 6 parts by mol with respect to 100 parts by mol of the main constituent, and the content ratio of the second accessory constituent to the Al is 0.01 to 0.4 in terms of mols. Dielectric layers are formed from a sintered body of the dielectric ceramic composition. The addition of various types of accessory elements such as rare-earth elements is possible, if necessary. This invention achieves a dielectric ceramic composition which is capable of ensuring favorable DC bias characteristics while ensuring high reliability, and a laminated ceramic capacitor using the dielectric ceramic composition.
    Type: Grant
    Filed: February 21, 2012
    Date of Patent: November 26, 2013
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takafumi Okamoto, Noriyuki Inoue, Hitoshi Nishimura
  • Patent number: 8592334
    Abstract: A dielectric ceramic composition comprises, a main component including barium titanate, a first subcomponent including MgO, a second subcomponent including sintering aids of SiO2 compound, a third subcomponent including at least one of V2O5, Nb2O5 and WO3, a fourth A subcomponent including RA oxide (note that, RA is at least one selected from Tb, Gd and Dy), a fourth B subcomponent including RB oxide (note that, RB is at least one selected from Ho, Y and Yb), and a fifth subcomponent including MnO or Cr2O3.
    Type: Grant
    Filed: March 30, 2009
    Date of Patent: November 26, 2013
    Assignee: TDK Corporation
    Inventors: Kosuke Takano, Mari Miyauchi, Nobuto Morigasaki, Hideaki Seki, Makoto Maeda, Takahiro Yamada
  • Patent number: 8593038
    Abstract: There is provided a dielectric composition, including: a basic powder including BamTiO3(0.995?m?1.010); a first subcomponent including 0.1 to 0.6 mole of zirconium (Zr) oxide or carbide, based on 100 moles of the basic powder; a second subcomponent including 0.8 to 6.0 moles of oxide or carbide including at least one of magnesium (Mg), strontium (Sr), and barium (Ba); a third subcomponent including 0.2 to 1.8 moles of oxide including at least one rare earth element; a fourth subcomponent including 0.05 to 0.30 mole of oxide including at least one transition metal; a fifth subcomponent including 0.05 to 0.35 mole of oxide including at least one of vanadium (V), niobium (Nb), and tantalum (Ta); and a sixth subcomponent including 0.5 to 4.0 moles of oxide including at least one of silicon (Si) and aluminum (Al).
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: November 26, 2013
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Sung Hyung Kang, Du Won Choi, Min Sung Song, Chan Hee Nam
  • Patent number: 8586495
    Abstract: A dielectric material is provided. The material includes ?[Ca1-x-yBaxSry(Ca1-zCuz)Cu2-pLa2p/3Ti4-qMqO12-?]+(1??)[BarSr1-rTiO3], wherein M is aluminum, chromium, zirconium, or combinations thereof; x can vary between the value of zero and 0.1 such that 0?x?0; y, z, and r can vary between the value of zero and 1 such that 0?y?1, 0?z?1, and 0?r?1; p and q can vary between the value of zero and 0.1 such that 0?p?0.1 and 0?q?0.1; ? can vary between the value of zero and 0.05 such that 0???0.05; and ? can vary between the value of 0.5 and 1 such that 0.5???1, with a proviso that when x=y=0 and z=?=1, p and q are greater than zero; and when x=y=z=0, p and q are not simultaneously zero. A dielectric component including the dielectric material and a system including the dielectric component are provided.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: November 19, 2013
    Assignee: General Electric Company
    Inventors: Kalaga Murali Krishna, Lohit Matani
  • Patent number: 8582277
    Abstract: A multilayer ceramic electronic component comprising an element body in which a dielectric layer and an internal electrode layer are stacked. The dielectric layer is constituted from a dielectric ceramic composition including; a compound having a perovskite structure expressed by a formula of ABO3 (A is at least one selected from Ba, Ca, and Sr; B is at least one selected from Ti, Zr, and Hf); an oxide of Mg; an oxide of rare earth elements including Sc and Y; and an oxide including Si. The dielectric ceramic composition comprises a plurality of dielectric particles and a grain boundary present in between the dielectric particles. In the grain boundary, when content ratios of Mg and Si are set to D(Mg) and D(Si) respectively, D(Mg) is 0.2 to 1.8 wt % in terms of MgO, and D(Si) is 0.4 to 8.0 wt % in terms of SiO2.
    Type: Grant
    Filed: November 21, 2011
    Date of Patent: November 12, 2013
    Assignee: TDK Corporation
    Inventors: Hirobumi Tanaka, Makoto Endo, Satoko Ueda, Daisuke Ueda, Shogo Murosawa, Daisuke Yoshida, Kenta Ono, Minoru Ogasawara, Tatsuya Kikuchi
  • Patent number: 8557724
    Abstract: A semiconductor porcelain composition is prepared by separately preparing a composition of (BaR)TiO3 (R is La, Dy, Eu, Gd or Y) and a composition of (BiNa)TiO3, and calcining the composition of (BaR)TiO3 at a temperature of 900° C. through 1300° C. and calcining the composition of (BiNa)TiO3 at a temperature of 700° C. through 950° C., and then mixing, forming and sintering the calcined powders. Similarly, a semiconductor porcelain composition is prepared by separately preparing a composition of (BaM)TiO3 (M is Nb, Ta or Sb) and a composition of (BiNa)TiO3, and calcining the composition of (BaM)TiO3 at a temperature of 900° C. through 1300° C. and calcining the composition of (BiNa)TiO3 at a temperature of 700° C. through 950° C., and then mixing, forming and sintering the calcined powders.
    Type: Grant
    Filed: November 27, 2009
    Date of Patent: October 15, 2013
    Assignee: Hitachi Metals, Ltd.
    Inventors: Takeshi Shimada, Koichi Terao, Kazuya Toji