Inorganic Titanate Compound Containing Patents (Class 156/89.14)
-
Patent number: 11315730Abstract: A multilayer electronic component having an electrode facing portion in which a plurality of internal electrode layers face one another with a dielectric layer interposed therebetween. Each dielectric layer includes Ba, Ti, Si, Re, and M. M is at least one element selected from Mn, Ni, Co, Fe, Cr, Cu, Mg, Li, Al, Mo, W, and V. When the Ti is represented in an amount of 100 parts by mole the dielectric layer at the electrode facing portion has Si in an amount a of 0.01?a?0.1, Re in an amount b of 0.1?b?3.0, and M in an amount c of 0.2?c?5.0. A ratio m of the amount of Ba to the amount of Ti is 0.965?m?0.990.Type: GrantFiled: August 3, 2020Date of Patent: April 26, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Kiyoshiro Ishibe, Daisuke Hamada
-
Patent number: 11107633Abstract: A ceramic electronic component includes a body including a dielectric layer, and a first internal electrode and a second internal electrode opposing each other with the dielectric layer interposed therebetween, and having first and second surfaces opposing each other, third and fourth surfaces connected to the first and second surfaces and opposing each other, and fifth and sixth surfaces connected to the first to fourth surfaces and opposing each other, a first external electrode including a first electrode layer connected to the first internal electrode, and a first conductive resin layer disposed on the first electrode layer, and disposed on the third surface of the body, and a second external electrode including a second electrode layer connected to the second internal electrode, and a second conductive resin layer disposed on the second electrode layer, and disposed on the fourth surface of the body.Type: GrantFiled: December 17, 2018Date of Patent: August 31, 2021Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Dong Hwi Shin, Do Yeon Kim, Sang Soo Park, Woo Chul Shin
-
Patent number: 10964482Abstract: A multi-layer ceramic capacitor having a weight of 8 mg or more includes a capacitance forming unit and a protective unit. The capacitance forming unit includes internal electrodes that are laminated in a first direction and includes end portions, positions of the end portions in a second direction orthogonal to the first direction being aligned with one another within a range of 0.5 ?m in the second direction. The protective unit covers the capacitance forming unit in the first direction and the second direction and includes an outer surface, a shortest distance between the outer surface and the end portion of an outermost layer in the internal electrodes in the first direction exceeding 10 ?m.Type: GrantFiled: December 14, 2018Date of Patent: March 30, 2021Assignee: Taiyo Yuden Co., Ltd.Inventors: Yuto Yamato, Takayuki Hattori, Takashi Asai, Hisamitsu Shizuno, Keisuke Ishii
-
Patent number: 10650945Abstract: A functional contactor and a portable electronic device having same. The functional contactor includes a conductive elastic part having elasticity and electrically connected to a conductor of an electronic device; and a functional element including a first electrode mounted on a circuit board of the electronic device, a second electrode electrically connected to the underside of the conductive elastic part, and a dielectric formed between the first electrode and the second electrode.Type: GrantFiled: July 1, 2016Date of Patent: May 12, 2020Assignee: AMOTECH CO., LTD.Inventors: Byung Guk Lim, Yun Suk Choi, Yoon-Ho Hwang
-
Patent number: 10188019Abstract: Provided are an electric shock protection contactor and a portable electronic device including the same. The electric shock protection contactor according to an exemplary embodiment of the present invention includes a conductive connection unit electrically in contact with a conductor of an electronic device and an electric shock protection element connected to the conductive connection unit in series and blocking a leakage current of an external power source that is introduced from the ground of a circuit board of the electronic device.Type: GrantFiled: October 16, 2015Date of Patent: January 22, 2019Assignee: AMOTECH CO., LTD.Inventors: Yoon-Ho Hwang, Byung Guk Lim, Yun Suk Choi
-
Patent number: 9905400Abstract: A gas distribution plate for a plasma reactor has a dielectric front plate and a dielectric back plate bonded together, with gas injection orifices extending through the front plate and gas supply channels in the surface of front plate facing the back plate. The back plate is joined to a heat reflective plate, or the back plate itself is formed of a heat reflective material, such as Beryllium Oxide.Type: GrantFiled: October 17, 2014Date of Patent: February 27, 2018Assignee: Applied Materials, Inc.Inventors: Michael W. Stowell, Qiwei Liang
-
Patent number: 9536643Abstract: A method for manufacturing a multilayer electronic component includes the steps of preparing a laminate including a plurality of laminated insulating layers and a plurality of internal electrodes disposed along interfaces between the insulating layers, edges of the internal electrodes being exposed at a predetermined surface of the laminate, and forming an external electrode on the predetermined surface to electrically connect exposed the edges of the internal electrodes. The step of forming an external electrode includes a plating step of forming a continuous plating film by depositing plating deposits on the edges of the internal electrodes exposed at the predetermined surface and by performing plating growth to be connected to each other, and a heat treatment step of performing a heat treatment at an oxygen partial pressure of about 5 ppm or less and at a temperature of about 600° C. or more.Type: GrantFiled: February 11, 2014Date of Patent: January 3, 2017Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Akihiro Motoki, Makoto Ogawa, Kenichi Kawasaki, Shunsuke Takeuchi, Shigeyuki Kuroda
-
Patent number: 9520231Abstract: A laminated ceramic capacitor that includes a ceramic laminated body of a plurality of stacked ceramic dielectric layers, a plurality of internal electrodes opposed to each other with the ceramic dielectric layers interposed therebetween within the ceramic laminated body, and external electrodes provided on the outer surface of the ceramic laminated body and electrically connected to the internal electrodes. The internal electrodes contain Ni as a main constituent, and the Ni constituting the internal electrodes has a lattice constant in the range of 0.3250 nm to 0.3450 nm.Type: GrantFiled: February 3, 2015Date of Patent: December 13, 2016Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Shoichiro Suzuki, Shinichi Yamaguchi
-
Patent number: 9478358Abstract: A multilayer ceramic capacitor that includes dielectric layers made mainly of a perovskite compound containing Ba and Ti and optionally Zr and Hf, and inner electrodes having an average thickness of approximately 0.5 ?m or less. The Mg content of the dielectric layers is approximately in the range of 0?Mg?0.4 (parts by mole) based on a total of 100 parts by mole of Ti, Zr, and Hf. The proportion of Mg-containing defects in the inner electrodes is approximately 20% or more.Type: GrantFiled: June 8, 2015Date of Patent: October 25, 2016Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Taisuke Kanzaki, Akio Masunari
-
Patent number: 9466423Abstract: A laminated ceramic capacitor that includes a ceramic laminated body of a plurality of stacked ceramic dielectric layers, a plurality of internal electrodes opposed to each other with the ceramic dielectric layers interposed therebetween within the ceramic laminated body, and external electrodes provided on the outer surface of the ceramic laminated body and electrically connected to the internal electrodes. The internal electrodes contain Ni as a main constituent, and the Ni constituting the internal electrodes has a lattice constant in the range of 0.3250 nm to 0.3450 nm.Type: GrantFiled: February 3, 2015Date of Patent: October 11, 2016Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Shoichiro Suzuki, Shinichi Yamaguchi
-
Publication number: 20150147677Abstract: Methods and compositions for a low temperature operating solid oxide fuel cell (SOFC) are provided. The SOFC includes a Sr0.8La0.2TiO3 (SLT) support layer, a (La0.9Sr0.1)0.98(Ga0.8Mg0.2)O3-? (LSGM) electrolyte layer and?a cathode layer disposed on top of said electrolyte layer.Type: ApplicationFiled: November 28, 2014Publication date: May 28, 2015Inventors: Scott A. Barnett, Zhan Gao, Elizabeth C. Miller
-
Publication number: 20150109717Abstract: A multilayer ceramic capacitor includes a multilayer body including a plurality of stacked dielectric layers including a dielectric ceramic that includes a plurality of crystal grains and a plurality of internal electrodes disposed at a plurality of interfaces between the dielectric layers, and external electrodes. The multilayer body includes a Ba and Ti containing perovskite compound, La, Mg and Mn, and satisfies conditions such that in a case in which a content of Ti is set to 100 molar parts, a fraction of each content of La, Mg and Mn relative to the content of Ti is such that La is about 1.2 to about 6.0 molar parts, Mg is about 0.5 to about 5.0 molar parts and Mn is about 1.0 to about 3.0 molar parts, and an average number of crystal grains included in each of the dielectric layers in the stacking direction is one or more to three or less.Type: ApplicationFiled: December 29, 2014Publication date: April 23, 2015Inventor: Takafumi OKAMOTO
-
Publication number: 20150103467Abstract: A multilayer ceramic capacitor includes a multilayer body including a plurality of stacked dielectric layers including a dielectric ceramic that includes a plurality of crystal grains and a plurality of internal electrodes disposed at a plurality of interfaces between the dielectric layers, and external electrodes. The multilayer body includes a Ba and Ti containing perovskite compound, La, Mg, Mn and Al, and satisfies conditions such that in a case in which a content of Ti is set to 100 molar parts, a fraction of each content of La, Mg, Mn and Al relative to the content of Ti is such that La is about 0.2 to about 1.2 molar parts, Mg is about 0.1 molar part or less, Mn is about 1.0 to about 3.0 molar parts and Al is about 0.5 to about 2.5 molar parts, and an average number of crystal grains included in each of the dielectric layers in the stacking direction is one or more to three or less.Type: ApplicationFiled: December 18, 2014Publication date: April 16, 2015Inventor: Takafumi OKAMOTO
-
Publication number: 20140375174Abstract: Textured PMN-PZT fabricated by templated grain growth (TGG) method has a piezoelectric coefficient (d) of 3 to 5 times that of its random counterpart. By combining this TGG method with low-temperature co-firing ceramics (LTCC) techniques, co-fired multilayer textured piezoelectric ceramic materials with inner electrodes were produced at a temperature as low as 925° C., which silver could be used. Trilayer PMN-PZT ceramics prepared by this method show a strain increase of 2.5 times, a driving voltage decrease of 3 times, and an equivalent piezoelectric coefficient (d*) improvement of 10 to 15 times that of conventional random ceramic counterparts. Further, a co-fired magnetostrictive/piezoelectric/magnetostrictive laminate structure with silver inner electrode was also synthesized. The integration of textured piezoelectric microstructure with the cost-effective low-temperature co-fired layered structure achieves strong magnetoelectric coupling.Type: ApplicationFiled: February 1, 2013Publication date: December 25, 2014Applicant: VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.Inventors: Yongke Yan, Shashank Priya
-
Publication number: 20140292161Abstract: Provision is made of a method for producing a piezoelectric multilayer component (1), in which piezoelectric green sheets, at least one ply (21) containing an auxiliary material having a first and a second component and layers (20) containing electrode material are arranged one above another alternately and sintered, wherein, during the sintering, the first and second components of the auxiliary material chemically react, and the at least one ply (21) containing the auxiliary material is degraded.Type: ApplicationFiled: June 26, 2012Publication date: October 2, 2014Applicant: EPCOS AGInventors: Bernhard Döllgast, Wolfgang Athenstaedt, Marion Ottlinger, Marlene Fritz
-
Publication number: 20140285070Abstract: The invention relates to a ceramic material, comprising lead zirconate titanate, which additionally contains K and optionally Cu. The ceramic material can be used in an electroceramic component, for example a piezoelectric actuator. The invention also relates to methods for producing the ceramic material and the electronic component.Type: ApplicationFiled: October 24, 2012Publication date: September 25, 2014Applicant: EPCOS AGInventors: Alexander Glazunov, Adalbert Feltz
-
Publication number: 20140226254Abstract: There are provided a conductive paste composition, a multilayer ceramic capacitor using the same, and a manufacturing method thereof. The conductive paste composition includes a conductive metal powder; a ceramic powder; and a resin, wherein the conductive paste composition has a theoretical density of 6 g/cm3 or higher and a relative density of 95% or more.Type: ApplicationFiled: April 26, 2013Publication date: August 14, 2014Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Young Ho KIM, Kyung Jin CHOI, Young Sik CHOI, Ji Hwan KIM, Dae Yu KIM, Ro Woon LEE
-
Publication number: 20140102619Abstract: The present invention provides a nano complex oxide doped dielectric ceramic material used for a multilayer ceramic capacitor using a base metal as a material of internal electrodes. The doped dielectric ceramic material comprises barium titanate and a nano complex oxide dopant, wherein the molar ratio of the barium titanate to the nano complex oxide dopant is in the range of (90˜98):(2˜10), the average particle size of the barium titanate is 50˜300 nm and the nano complex oxide dopant has the following formula (1): w A+x B+y C+z D. The present invention also provides processes for preparing the nano complex oxide doped dielectric ceramic material and ultrafine-grained and temperature-stable multilayer ceramic capacitors using the nano complex oxide doped dielectric ceramic material as the material of dielectric layers.Type: ApplicationFiled: December 13, 2013Publication date: April 17, 2014Applicant: Tsinghua UniversityInventors: Xiaohui Wang, Zhibin Tian, Tian Wang, Longtu Li
-
Publication number: 20140043720Abstract: There is provided a multilayered ceramic electronic component including: a multilayered body in which a plurality of dielectric layers are stacked; a plurality of first and second internal electrodes formed on the dielectric layers so as to be alternately exposed through end surfaces; a minimum margin indicating part formed on an L-direction margin part on which the first or second internal electrode is not formed on the dielectric layer and indicating a minimum size of the L-direction margin part, the L-direction minimum margin indicating part being inserted on the ceramic sheet, whereby a multilayered ceramic electronic component having high capacitance while reducing a defect and having excellent reliability may be implemented.Type: ApplicationFiled: November 7, 2012Publication date: February 13, 2014Applicant: SAMSUNG ELECTRO-MECHANICS, CO., INC.Inventors: Seok Joon HWANG, Je Jung KIM
-
Publication number: 20130342958Abstract: A dielectric ceramic that can be sintered at a sufficiently low temperature and has a desired specific resistance at a high temperature, and a multilayer ceramic electronic component (a multilayer ceramic capacitor and the like) using the dielectric ceramic are provided. The multilayer ceramic capacitor includes a multilayer body having a plurality of laminated dielectric ceramic layers, and a plurality of internal electrodes at interfaces between the dielectric ceramic layers; and external electrodes 8 and 9 on outer surfaces of the multilayer body. The composition of the multilayer body includes a perovskite-type compound containing Ba and Ti (where a part of Ba may be substituted by Ca, and a part of Ti may be substituted by Zr) as a primary ingredient, and further includes M (where M is at least one of Cu, Zn, Li, K, and Na) and Bi. The total content of M and Bi is equal to or greater than 3 molar parts when the total content of Ti and Zr is 100 molar parts.Type: ApplicationFiled: August 27, 2013Publication date: December 26, 2013Applicant: MURATA MANUFACTURING CO., LTD.Inventors: Shoichiro Suzuki, Koichi Banno, Akihiro Shiota, Masahiro Otsuka, Taisuke Kanzaki, Masanori Nakamura
-
Publication number: 20130321118Abstract: There are provided a non-magnetic composition for a ceramic electronic component, a ceramic electronic component manufactured by using the same, and a manufacturing method thereof. The non-magnetic composition for a ceramic electronic component includes a compound represented by ZnCuTiO4 such that the inductance decreasing rate at the high current and the capacitance rate of change of the magnetic body after the application of current according to the temperature change are insensitive, whereby the stable operational characteristics of the ceramic electronic component may be secured.Type: ApplicationFiled: August 14, 2012Publication date: December 5, 2013Inventors: Sung Yong AN, Min Kyoung Cheon, Ho Yoon Kim, Young Il Lee, Myeong Gi Kim
-
Publication number: 20130294008Abstract: The present invention relates to a multilayer electronic component having a structure in which a dielectric layer and an internal electrode layer are alternately laminated, which includes the dielectric layer and the internal electrode layer including metal powder and an inhibitor, wherein the inhibitor includes 0.5 to 20 mol % of a Ca component based on 100 mol % of a barium titanate (BT) base material, and a method for manufacturing the same. According to the present invention, it is possible to provide a multilayer electronic component that can implement excellent electrical characteristics and electrode connectivity by adding a Ca component to an internal electrode layer as a sub-component of the inhibitor to minimize the occurrence of oxygen vacancies on the interface formed when the inhibitor component included in the internal electrode layer moves to the dielectric layer.Type: ApplicationFiled: March 13, 2013Publication date: November 7, 2013Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Jong Han KIM, Su Hwan CHO, Doo Young KIM, Ji Young PARK, Jae Yeol CHOI
-
Publication number: 20130222973Abstract: A laminated ceramic capacitor including a laminated body having a plurality of stacked ceramic layers and internal electrodes located between the ceramic layers. The internal electrodes have a plurality of ceramic columnar members formed therein, which project into the internal electrodes from interfaces between the ceramic layers and the internal electrodes, but do not penetrate in the thickness direction of the internal electrodes.Type: ApplicationFiled: April 9, 2013Publication date: August 29, 2013Applicant: MURATA MANUFACTURING CO., LTD.Inventor: Murata Manufacturing Co., Ltd.
-
Publication number: 20120306323Abstract: A method for producing a piezoelectric multilayer component is disclosed. Piezoelectric green films and electrode material are provided, arranged alternately on top of one another and sintered. The electrode material is provided with a PbO-containing coating and/or PbO is mixed into the electrode material.Type: ApplicationFiled: January 21, 2011Publication date: December 6, 2012Applicant: EPCOS AGInventors: Alexander Glazunov, Oliver Dernovsek
-
Publication number: 20120147518Abstract: 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: ApplicationFiled: February 23, 2012Publication date: June 14, 2012Inventors: Makoto Matsuda, Tomoyuki Nakamura
-
Patent number: 7731812Abstract: Methods of forming a multilayer circuit comprising: a) forming a patterned array of vias in a plurality of layers of green tape; b) filling the vias in one or more of the green tape layers from (a); c) printing over at least one surface of the green tape layers from step (b) with at least one patterned layer of a thick film composition consisting essentially of: i) electrically conductive powder; ii) an inorganic binder wherein the inorganic binder is selected from TiO2 and any compounds that can generate TiO2 during firing and any one of the following compounds: Sb2O3, Co3O4, PbO, Fe2O3, SnO2, MnO, CuO and mixtures thereof; and iii) an organic medium, ?wherein the total inorganic binder is in the range of 0.6 wt. % to about 2 wt. % of the total composition. d) laminating the printed green tape layers from step (d) to form an assemblage comprising a plurality of unfired interconnected functional layers separated by unfired green tape; and e) cofiring the assemblage from step (d).Type: GrantFiled: October 17, 2007Date of Patent: June 8, 2010Assignee: E.I. du Pont de Nemours and CompanyInventors: Yueli Wang, Christopher R. Needes, Patricia J. Ollivier
-
Patent number: 7722732Abstract: The present invention is directed to the use of a thick film paste composition comprising, in weight percent total paste composition, materials selected from mixtures of lead iron tungstate niobate solid solutions 30 to 80%, calcined mixtures of barium titanate, lead oxide and fused silica 20 to 70%, barium titanate 30 to 50%, calcined mixtures of barium titanate 30 to 50%, barium titanate and calcined mixtures of barium titanate 30 to 50%, lead oxide and fused silica 50-80%, and a lead germanate glass 3-20%, as a thick film paste via fill composition for use in the formation of multilayer low temperature cofired ceramic circuits.Type: GrantFiled: June 12, 2006Date of Patent: May 25, 2010Assignee: E. I. du Pont de Nemours and CompanyInventors: Christopher R. Needes, Mark Frederick McCombs, Kumaran Manikantan Nair
-
Patent number: 7713366Abstract: A piezoelectric/electrostrictive film is formed on a solid-phase support, the piezoelectric/electrostrictive film including an incompletely bonded region which is incompletely bonded in a predetermined pattern to the solid-phase support, and a bonded region which is bonded to the surface of the solid-phase support so that the incompletely bonded region can be separated. The piezoelectric/electrostrictive film is bonded to a substrate and is separated from the solid-phase support in the bonded region. As a result, the incompletely bonded region is transferred to the substrate. The transferred incompletely bonded region is used as a piezoelectric/electrostrictive film for manufacturing a piezoelectric/electrostrictive film device.Type: GrantFiled: October 24, 2006Date of Patent: May 11, 2010Assignee: NGK Insulators, Ltd.Inventors: Iwao Ohwada, Nobuyuki Kobayashi
-
Publication number: 20100038014Abstract: To provide a method for producing a laminated dielectric material using a stabilized glass. A method for producing a laminated dielectric material wherein the absolute value of the difference in the average linear expansion coefficient at from 50 to 350° C. between any adjacent dielectric layers is at most 15×10?7/° C.; at least one raw material layer before firing, comprises, as represented by mass %, from 50 to 80% of glass powder and from 20 to 50% of alumina powder; said glass powder comprises, as represented by mol %, from 45 to 60% of SiO2, from 2 to 10% of Al2O3, from 10 to 30% of BaO, from 10 to 20% of ZnO, etc.; and each of glass powders contained in two raw material layers adjacent to said raw material layer, comprises, as represented by mol %, from 45 to 55% of SiO2, from 2 to 20% of Al2O3, from 20 to 45% of MgO, etc.; and the glass transition temperature of the latter glass powder is higher by at least 50° C. than that of the former.Type: ApplicationFiled: October 20, 2009Publication date: February 18, 2010Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Satoru TOMENO, Yasuko Osaki, Kazuo Watanabe, Katsuyoshi Nakayama
-
Patent number: 7662250Abstract: A production method of a dielectric ceramic composition at least including a main component including a dielectric oxide having perovskite-type crystal structure expressed by a formula ABO3 (note that in the formula, “A” indicates one or more elements selected from Ba, Ca, Sr and Mg, and that “B” indicates one or more elements selected from Ti, Zr and Hf) comprises steps of preparing a main component material including said dielectric oxide expressed by ABO3; preparing a subcomponent material including a composite oxide expressed by M4R6O(SiO4)6 (note that “M” indicates at least one selected from Ca and Sr, and that “R” indicates at least one selected from Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu); mixing said main component material and subcomponent material to obtain a dielectric ceramic composition material; and firing said dielectric ceramic composition material.Type: GrantFiled: March 18, 2008Date of Patent: February 16, 2010Assignee: TDK CorporationInventors: Tomoaki Nonaka, Hiroshi Sasaki, Tsutomu Odashima, Tetsuo Takaishi, Takahiro Harada
-
Patent number: 7638010Abstract: A production method of a multilayer ceramic device is provided, by which, for example, a multilayer ceramic capacitor having a large capacity, wherein the interlayer thickness is made as thin as about 2.5 ?m or thinner, can be produced at a high production yield without causing unsticking between layers and internal defects. In the present invention, when assuming that a first weight ratio (wt %) of the first organic binder component with respect to a first inorganic dielectric colorant powder in said green sheet slurry for forming a green sheet 10a is (A), and a second weight ratio (wt %) of the second organic binder component with respect to said second inorganic dielectric colorant powder in said electrode level difference absorbing dielectric paste for forming a dielectric blank pattern layer 24 is (B), the second weight ratio (B) is larger than the first weight ratio (A).Type: GrantFiled: July 5, 2004Date of Patent: December 29, 2009Assignee: TDK CorporationInventors: Yasumichi Tokuoka, Shigeki Satou, Tatsunori Satou
-
Publication number: 20090225494Abstract: Disclosed is a multilayer ceramic capacitor which has a dielectric ceramic having a dielectric layer, wherein the dielectric layer mainly comprises barium titanate, contains a crystalline particle having an average crystal diameter of 0.15 to 0.3 ?m, and contains Mg in an amount of 0.5 to 2 parts by mol in terms of MgO, Mn in an amount of 0.2 to 0.5 part by mol in terms of MnO, and a first rare earth element (RE) selected from Ho, Y, Er, Tm, Yb and Lu and a second rare earth element (RE) selected from Sm, Eu, Gd, Tb and Dy in a total amount of 0.Type: ApplicationFiled: September 27, 2007Publication date: September 10, 2009Applicant: KYOCERA CORPORATIONInventor: Youichi Yamazaki
-
Patent number: 7578896Abstract: A method of producing a multilayer ceramic electronic device, having a firing step for firing a pre-firing element body wherein a plurality of dielectric layers and internal electrode layers containing a base metal are alternately arranged, characterized in that the firing step has a temperature raising step for raising a temperature to a firing temperature, and hydrogen is continued to be introduced from a point in time of the temperature raising step. According to the method, it is possible to provide a method of producing a multilayer ceramic electronic device, such as a multilayer ceramic capacitor, wherein shape anisotropy and other structural defaults are hard to occur and electric characteristics are improved while suppressing deterioration thereof even if dielectric layers becomes thinner and stacked more.Type: GrantFiled: August 29, 2007Date of Patent: August 25, 2009Assignee: TDK CorporationInventors: Takako Hibi, Yukie Nakano, Shunichi Yuri, Takahiro Ushijima, Akira Sato, Wataru Takahara, Masako Yoshii
-
Patent number: 7575709Abstract: A method of making electrochemical sensors in which an electrolyte material is cast into a tape. Prefabricated electrodes are then partially embedded between two wet layers of the electrolyte tape to form a green sensor, and the green sensor is then heated to sinter the electrolyte tape around the electrodes. The resulting sensors can be used in applications such as, but not limited to, combustion control, environmental monitoring, and explosive detection. A electrochemical sensor formed by the tape-casting method is also disclosed.Type: GrantFiled: April 19, 2005Date of Patent: August 18, 2009Assignee: Los Alamos National Security, LLCInventors: Rangachary Mukundan, Eric L. Brosha, Fernando H. Garzon
-
Patent number: 7547370Abstract: A method for manufacturing a multilayer ceramic electronic element includes the steps of forming ceramic green sheets having superior surface smoothness and small variations in thickness at a high speed, in which defects such as pinholes are prevented from occurring, and providing internal electrodes and step-smoothing ceramic paste on the ceramic green sheets with high accuracy. The method includes the steps of applying ceramic slurry to a base film by a die coater followed by drying performed in a drying furnace for forming the ceramic green sheets, and performing gravure printing of conductive paste and ceramic paste onto the ceramic green sheets by using a first and a second gravure printing apparatus, respectively. Accordingly, the internal electrodes are formed, and the step-smoothing ceramic paste is provided in regions other than those in which the internal electrodes are formed.Type: GrantFiled: December 15, 2006Date of Patent: June 16, 2009Assignee: Murata Manufacturing Co., Ltd.Inventors: Shingo Okuyama, Hiroyoshi Takashima, Akira Hashimoto, Shinichi Kokawa
-
Publication number: 20090135546Abstract: The present invention provides a nano complex oxide doped dielectric ceramic material used for a multilayer ceramic capacitor using a base metal as a material of internal electrodes. The doped dielectric ceramic material comprises barium titanate and a nano complex oxide dopant, wherein the molar ratio of the barium titanate to the nano complex oxide dopant is in the range of (90˜98):(2˜10), the average particle size of the barium titanate is 50˜300 nm and the nano complex oxide dopant has the following formula (1): w A+x B+y C+z D. The present invention also provides processes for preparing the nano complex oxide doped dielectric ceramic material and ultrafine-grained and temperature-stable multilayer ceramic capacitors using the nano complex oxide doped dielectric ceramic material as the material of dielectric layers.Type: ApplicationFiled: November 25, 2008Publication date: May 28, 2009Applicant: Tsinghua UniversityInventors: Xiaohui Wang, Zhibin Tian, Tian Wang, Longtu Li
-
Publication number: 20090122462Abstract: An electronic device, such as a multilayer ceramic capacitor, and a method for producing the electronic device having an internal electrode layer and a dielectric layer, comprising a step of forming a pre-fired internal electrode thin film including a conductive component and a dielectric component, a step of stacking green sheets to be dielectric layers after firing and the internal electrode thin films, and a step of firing a multilayer body of the green sheets and the internal electrode thin films are provided: by which grain growth of conductive particles in a firing step can be suppressed, spheroidizing in the internal electrode layers and breaking of electrodes can be effectively prevented, and a decline of the capacitance can be effectively suppressed even when a thickness of each internal electrode layer is made thinner.Type: ApplicationFiled: May 26, 2005Publication date: May 14, 2009Applicant: TDK CorporationInventors: Kazutaka Suzuki, Shigeki Sato
-
Publication number: 20090110916Abstract: The invention provides a low energy loss, multi-layered polypropylene/metal foil product useful for further processing into printed circuit boards and antenna boards for microwave circuitry. A continuous process for manufacture of the product is described. The process comprises the steps of: providing metal foil; optionally, extrusion coating molten polypropylene upon said metal foil, to obtain a foil coated with a polypropylene foundation layer; casting a molten polypropylene tie-layer upon said metal foil or upon said coated metal foil; and laminating a polypropylene sheet on said tie layer. In the process, heat is applied to induce fusing of the layers of the multi-layered product.Type: ApplicationFiled: July 3, 2006Publication date: April 30, 2009Inventor: Valery Ostrovsky
-
Publication number: 20090073635Abstract: A small, large-capacitance multi-layer ceramic capacitor suppressed for remarkable lowering of permittivity, having a capacitor main body formed of ceramic dielectric layers comprising barium titanate as a main component and an Si oxide at a ratio of 0.5 to 10 mol being converted as SiO2 based on 100 mol of barium titanate and internal electrode layers, and a pair of external electrodes which are formed at the end faces of the capacitor main body and connected electrically with the internal electrode layers, in which the ceramic dielectric layer has crystal grains, crystal grain boundaries each present between the crystal grains and a grain boundary triple point, and B/A is 0.Type: ApplicationFiled: August 8, 2008Publication date: March 19, 2009Applicant: Taiyo Yuden Co., Ltd.Inventor: Katsuya Taniguchi
-
Patent number: 7503993Abstract: A method for manufacturing a multilayer ceramic electronic element includes the steps of forming ceramic green sheets having superior surface smoothness and small variations in thickness at a high speed, in which defects such as pinholes are prevented from occurring, and providing internal electrodes and step-smoothing ceramic paste on the ceramic green sheets with high accuracy. The method includes the steps of applying ceramic slurry to a base film by a die coater followed by drying performed in a drying furnace for forming the ceramic green sheets, and performing gravure printing of conductive paste and ceramic paste onto the ceramic green sheets by using a first and a second gravure printing apparatus, respectively. Accordingly, the internal electrodes are formed, and the step-smoothing ceramic paste is provided in regions other than those in which the internal electrodes are formed.Type: GrantFiled: August 25, 2004Date of Patent: March 17, 2009Assignee: Murata Manufacturing Co., Ltd.Inventors: Shingo Okuyama, Hiroyoshi Takashima, Akira Hashimoto, Shinichi Kokawa
-
Patent number: 7491283Abstract: At the time of pressing an electrode layer 12a against a surface of a green sheet 10a having a thickness of 3 ?m or thinner to bond the electrode layer 12a with the surface of the green sheet 10a, an adhesive layer 28 having a thickness of 0.02 to 0.3 ?m is formed on a surface of the electrode layer 12a or the surface of the green sheet 10a. It is possible to easily transfer a dry type electrode layer to the surface of the green sheet with high accuracy without breaking or deforming the green sheet.Type: GrantFiled: December 26, 2003Date of Patent: February 17, 2009Assignee: TDK CorporationInventors: Masahiro Karatsu, Shigeki Satou, Takeshi Nomura
-
Patent number: 7449077Abstract: The invention relates to a method for the production of a monolithic multilayer actuator, a corresponding monolithic multilayer actuator, as well as an external contact for a monolithic multilayer actuator. According to the invention specific microdisturbances are incorporated in the actuator structure along the longitudinal axis of the stack essentially parallel and spaced to the inner electrodes in the area of the at least two opposite outer surfaces to which the inner electrodes known per se are brought out, which at the earliest during polarisation of the actuator are subject to a pregiven, limited, stress-reducing growth into the interior and/or towards the outer electrode, wherein additionally the basic metallic coating and/or the external contact is formed elongation-resistant or elastic at least in the area of the microdisturbances.Type: GrantFiled: May 14, 2003Date of Patent: November 11, 2008Assignee: Pi Ceramic GmbH Keramische Technologien und BauelementeInventors: Astrid Heinzmann, Eberhard Hennig, Daniel Kopsch, Patrick Pertsch, Stefan Richter, Eike Wehrsdorfer
-
Patent number: 7431785Abstract: A monolithic piezoelectric part capable of yielding a high piezoelectric d constant and suppressing reduction in reliability such as deterioration in insulation resistance can be obtained by a method for manufacturing a monolithic piezoelectric part wherein a piezoelectric ceramic body is formed of a perovskite compound oxide expressed by the general formula of ABO3, and the molar quantity of the A site component, Pb, is reduced by about 0.5 mol % to 5.0 mol % from that of the stoichiometric composition, ceramic raw materials are combined so that the average valence of the B site component is greater than quadrivalent, which is the same as the stoichiometric composition, to synthesize the ceramic powdered raw material, which is processed subsequently to fabricate a layered article, and the layered article is subjected to sintering processing within an atmosphere wherein the oxygen concentration is about 5% or less but more than 0% by volume.Type: GrantFiled: July 23, 2003Date of Patent: October 7, 2008Assignee: Murata Manufacturing Co., Ltd.Inventors: Katsuhiro Horikawa, Tomoyuki Ogawa
-
Publication number: 20080236723Abstract: A production method of a dielectric ceramic composition at least including a main component including a dielectric oxide having perovskite-type crystal structure expressed by a formula ABO3 (note that in the formula, “A” indicates one or more elements selected from Ba, Ca, Sr and Mg, and that “B” indicates one or more elements selected from Ti, Zr and Hf) comprises steps of preparing a main component material including said dielectric oxide expressed by ABO3; preparing a subcomponent material including a composite oxide expressed by M4R6O(SiO4)6 (note that “M” indicates at least one selected from Ca and Sr, and that “R” indicates at least one selected from Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu); mixing said main component material and subcomponent material to obtain a dielectric ceramic composition material; and firing said dielectric ceramic composition material.Type: ApplicationFiled: March 18, 2008Publication date: October 2, 2008Applicant: TDK CORPORATIONInventors: Tomoaki Nonaka, Hiroshi Sasaki, Tsutomu Odashima, Tetsuo Takaishi, Takahiro Harada
-
Publication number: 20080115876Abstract: A dielectric ceramic composition containing at least 0.15 to 2.5 mol of a Mg compound in terms of MgO, 0 to 1.6 mol of a Ba compound in terms of BaCO3, 0.1 to 3.0 mol of a Ln (Ln includes two or three kinds of elements selected from Er, Dy, and Ho with Er being essential) compound in terms of Ln2O3, 0.01 to 0.4 mol of a Mn compound in terms of MnO4/3, 0.01 to 0.26 mol of a V compound in terms of V2O5, 0.3 to 3.5 mol of a Si compound in terms of SiO2, and 0.01 to 2.5 mol of an Al compound in terms of Al2O3 to 100 mol of barium titanate adjusted for a Ba/Ti molar ratio of 0.997 to 1.007.Type: ApplicationFiled: March 24, 2006Publication date: May 22, 2008Inventors: Kazuhiro Komatsu, Kazuki Hirata, Atsuo Nagai, Tadashi Onomi, Kenji Oka
-
Patent number: 7361242Abstract: A ceramic slurry composition has a powdered ceramic uniformly dispersed therein without excessive damage thereto. A method for producing a ceramic green sheet using the ceramic slurry composition and a method for producing multilayer ceramic electronic devices are also disclosed. The ceramic slurry composition contains the powdered ceramic, a dispersing agent, a binder and a solvent, in which an anionic dispersing agent is used as the dispersing agent, and the content of the anionic dispersing agent is set to be such that the total acid content thereof corresponds to about 10 to 150% of the total base content of the powdered ceramic. In addition, the powdered ceramic having an average particle diameter of about 0.01 to 1 ?m is used.Type: GrantFiled: April 8, 2003Date of Patent: April 22, 2008Assignee: Murata Manufacturing Co., Ltd.Inventors: Ichiro Nakamura, Hidehiko Tanaka
-
Publication number: 20080026136Abstract: A process for forming a multilayer ceramic device. The device includes forming a ceramic precursor layer followed by ink jet printing in alternating order an electrode precursor in a predetermined pattern on the ceramic precursor layer to form an electrode and a ceramic ink on the electrode. The ceramic precursor is then sintered.Type: ApplicationFiled: July 24, 2006Publication date: January 31, 2008Inventors: Daniel J. Skamser, Michael S. Randall, J. Thomas Hochheimer, Azizuddin Tajuddin
-
Patent number: 7323073Abstract: A piezoelectric ceramic composition including three components, Pb(Zn1/3Nb2/3)O3, PbTiO3, and PbZrO3, and having a basic composition formula of Pb(Zn1/3Nb2/3)xZryTizO3, where 0.90<x+y+z<1.0, exhibits excellent piezoelectric characteristics and heat resistance and has a low sintering temperature of about 900° C., a coupling coefficient Kp not less than 0.50, and a Curie temperature not lower than 300° C. A piezoelectric device using this composition may employ inexpensive silver and silver-palladium alloys containing a high percentage of silver as material of an internal electrode, thus being inexpensive and having excellent characteristics.Type: GrantFiled: June 2, 2003Date of Patent: January 29, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Seiichi Minami, Yasushi Goto, Kazuhiro Okuda
-
Patent number: 7300534Abstract: Various coupling agents are disclosed to form lap joints between metallic and polymeric surfaces within catheters and other medical devices. The coupling agents disclosed in the present invention can be applied directly to a metallic surface, or the coupling agents may be incorporated within a polymeric material. In certain circumstances, the mere application of the coupling agent between the two dissimilar materials provides sufficient adhesive strength to form a fatigue-free lap joint bond. Alternative methods utilize coupling agents as primers for later thermal bonding and laser welding procedures that form lap joint bonds.Type: GrantFiled: January 15, 2002Date of Patent: November 27, 2007Assignee: Boston Scientific Scimed, Inc.Inventors: Lixiao Wang, Dachuan Yang, Joe Randall, (Bruce) Yiqun Wang
-
Patent number: 7276130Abstract: A method of producing a multilayer ceramic electronic device, having a firing step for firing a pre-firing element body wherein a plurality of dielectric layers and internal electrode layers containing a base metal are alternately arranged, characterized in that the firing step has a temperature raising step for raising a temperature to a firing temperature, and hydrogen is continued to be introduced from a point in time of the temperature raising step. According to the method, it is possible to provide a method of producing a multilayer ceramic electronic device, such as a multilayer ceramic capacitor, wherein shape anisotropy and other structural defaults are hard to occur and electric characteristics are improved while suppressing deterioration thereof even if dielectric layers becomes thinner and stacked more.Type: GrantFiled: April 12, 2002Date of Patent: October 2, 2007Assignee: TDK CorporationInventors: Takako Hibi, Yukie Nakano, Shunichi Yuri, Takahiro Ushijima, Akira Sato, Wataru Takahara, Masako Yoshii