Ceramic Composition (e.g., Barium Titanate) Patents (Class 310/358)
  • Patent number: 10462579
    Abstract: According to an embodiment, a MEMS transducer includes a stator, a rotor spaced apart from the stator, and a multi-electrode structure including electrodes with different polarities. The multi-electrode structure is formed on one of the rotor and the stator and is configured to generate a repulsive electrostatic force between the stator and the rotor. Other embodiments include corresponding systems and apparatus, each configured to perform corresponding embodiment methods.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: October 29, 2019
    Assignee: INFINEON TECHNOLOGIES AG
    Inventor: Stefan Barzen
  • Patent number: 10424718
    Abstract: A method for producing a piezoelectric film includes forming a metal film, recrystallizing a portion of the metal film by heating, forming an amorphous film of piezoelectric material on the metal film; and heating the amorphous film at a position of the recrystallized portion of the metal film.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: September 24, 2019
    Assignee: Ricoh Company, Ltd.
    Inventor: Xianfeng Chen
  • Patent number: 10418542
    Abstract: A piezoelectric ceramic speaker includes a piezoelectric element using a vibration sheet formed with piezoelectric ceramic having a primary phase constituted by ceramic grains of perovskite crystal structure containing Pb, Nb, Zn, Ti, and Zr, and a secondary phase constituted by ZnO grains, wherein the primary phase is constituted by ceramic grains expressed by a composition formula Pb {(Zr(1-a)Tia)x·(Ni1/3Nb2/3)y·(Zn1/3Nb2/3)z}O3 (where 0<x?0.85, 0?y<1, 0<z<1, x+y+z=1, and 0.45?a?0.60); and an enclosure which encloses the piezoelectric element.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: September 17, 2019
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Gouki Watanabe, Takayuki Goto, Keiichi Hatano, Sumiaki Kishimoto, Yutaka Doshida
  • Patent number: 10396271
    Abstract: A piezoelectric element includes a piezoelectric body that is provided on a substrate and includes multiple sides; a first wiring that is provided from the piezoelectric body to the substrate; and a second wiring that is provided from the piezoelectric body to the substrate. When the piezoelectric element is viewed from a thickness direction of the piezoelectric body, a second side and a fourth side on which the piezoelectric body is superimposed on the first wiring are different from a first side and a third side on which the second wiring is superimposed on the piezoelectric body.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: August 27, 2019
    Assignee: Seiko Epson Corporation
    Inventor: Hiroshi Matsuda
  • Patent number: 10388456
    Abstract: A dielectric composition, a dielectric element, an electronic component and a laminated electronic component are disclosed. In an embodiment the dielectric composition includes a perovskite compound comprising a main component having Bi, Na, Sr, Ln and Ti, wherein Ln is at least one type of a rare earth element, and wherein a mean crystal grain size is between 0.1 ?m and 1 ?m.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: August 20, 2019
    Assignee: TDK ELECTRONICS AG
    Inventors: Tomoya Imura, Tomohiro Terada
  • Patent number: 10381544
    Abstract: A system and method provides a piezoelectric stack arrangement for reduced driving voltage while maintaining a driving level for active piezoelectric materials. A stack arrangement of d36 shear mode <011>single crystals of both air X-cut and Y-cut ±1:45° (±20°) arrangement are bonded with discrete conductive pillars to form a shear crystal stack. The bonding area between the neighboring crystal parts is minimized. The bonding pillars are positioned at less than a total surface are of the single crystal forming the stack. The stack fabrication is facilitated with a precision assembly system, where crystal parts are placed to desired locations on an assembly fixture for alignment following the preset operation steps. With the reduced clamping effect from bonding due to lower surface coverage of the discrete conductive pillars, such a piezoelectric d36 shear crystal stack exhibits a reduced driving voltage while maintaining a driving level and substantial and surprisingly improved performance.
    Type: Grant
    Filed: May 6, 2015
    Date of Patent: August 13, 2019
    Assignee: CTS Corporation
    Inventors: Pengdi Han, Jian Tian, Stephen Dynan, Brandon Stone
  • Patent number: 10363016
    Abstract: A piezoelectric element, in which a piezoelectric body, and a vibrating plate having [111]-oriented single crystal silicon as a vibrating material are laminated is provided. In addition, a manufacturing method of a piezoelectric element including: cutting out a vibrating material to be used in the vibrating plate from a [111]-oriented single crystal silicon wafer; and laminating a piezoelectric body and the vibrating plate is provided.
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: July 30, 2019
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Sayaka Yamasaki, Hiroaki Tamura
  • Patent number: 10347817
    Abstract: A lead-free piezoelectric ceramic composition including an alkali niobate/tantalate perovskite oxide main phase having piezoelectric properties and a different metal oxide. The mole ratio (Na/K) between Na (sodium) and K (potassium) in the main phase is 0.40<(Na/K)<3.0. The main phase has a crystal structure in which (i) first spots corresponding to a primitive lattice period and (ii) second spots corresponding to the lattice period two times the primitive lattice period and being weaker than the first spots appear in an electron beam diffraction image entering from the <100> direction with the main phase represented as a pseudo-cubic crystal system. Also, the area ratio of a crystal phase reflecting the second spots in the main phase is 33% or less, and the maximum grain size of crystals reflecting the second spots in the main phase is 25 nm or less.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: July 9, 2019
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Hisashi Kozuka, Hideto Yamada, Takayuki Matsuoka, Kazuaki Kitamura, Masato Yamazaki, Toshiaki Kurahashi, Takashi Kasashima, Yasuyuki Okimura, Kazushige Ohbayashi
  • Patent number: 10340441
    Abstract: A lead-free piezoelectric ceramic composition including an alkali niobate/tantalate perovskite oxide main phase having piezoelectric properties and a different metal oxide subphase. The mole ratio (Na/K) between Na (sodium) and K (potassium) in the main phase assumes a value in a range represented by 0.40<(Na/K)<3.0. The main phase has a crystal structure in which (i) first spots corresponding to a primitive lattice period and (ii) second spots corresponding to the lattice period two times the primitive lattice period and being weaker than the first spots appear in an electron beam diffraction image entering from the <100> direction with the main phase represented as a pseudo-cubic crystal system.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: July 2, 2019
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Hisashi Kozuka, Hideto Yamada, Takayuki Matsuoka, Kazuaki Kitamura, Masato Yamazaki, Toshiaki Kurahashi, Takashi Kasashima, Yasuyuki Okimura, Kazushige Ohbayashi
  • Patent number: 10333488
    Abstract: An electroacoustic component is disclosed. In an embodiment, the electroacoustic component includes a piezoelectric substrate comprising a rare earth metal and calcium oxoborates (RE-COB) and component structures arranged on the substrate, the component structures being suitable for converting between RF signals and acoustic waves, wherein the waves are capable of propagation in a direction x??, and wherein the direction x?? is determined by Euler angles (?, ?, ?), the Euler angles being selected from angle ranges (20-90, 95-160, 15-55), (20-85, 95-160, 95-125) and (15-25, 85-100, 0-175).
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: June 25, 2019
    Assignee: SnapTrack, Inc.
    Inventors: Philipp Michael Jäger, Ulrike Rösler
  • Patent number: 10312024
    Abstract: A multilayer ceramic capacitor includes a multilayer body including ceramic layers and including main surfaces, side surfaces, and end surfaces, inner electrodes, which are located inside the multilayer body and a portion of each of which extends to one main surface, and outer electrodes located on one main surface and connected to the inner electrodes. Each of the outer electrodes includes outer electrode side surface portions located up to a portion of each of the side surfaces and an outer electrode end surface portion located up to one end surface, and about 1.40?A/B?about 3.33 is satisfied, where the lengths of the outer electrode side surface portions in the direction in which the main surfaces are connected are indicated as A and the lengths of the outer electrode end surface portions in the direction in which the main surfaces are connected are indicated as B.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: June 4, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Yutaka Ota
  • Patent number: 10280119
    Abstract: A barium titanate piezoelectric ceramic having good piezoelectric properties and mechanical strength and a piezoelectric element that includes the ceramic are provided. A method for making a piezoelectric ceramic includes forming a compact composed of an oxide powder containing barium titanate particles, sintering the compact, and decreasing the temperature of the compact after the sintering. The sintering includes (A) increasing the temperature of the compact to a first temperature within a temperature range of a shrinking process of the compact; (B) increasing the temperature of the compact to a second temperature within a temperature range of a liquid phase sintering process of the compact after (A); (C) decreasing the temperature of the compact to a third temperature within the temperature range of the shrinking process of the compact after (B); and (D) retaining the third temperature after (C).
    Type: Grant
    Filed: December 30, 2016
    Date of Patent: May 7, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takanori Matsuda, Hiroshi Saito, Tatsuo Furuta, Jumpei Hayashi, Takayuki Watanabe, Toshihiro Ifuku
  • Patent number: 10256749
    Abstract: The invention relates to a piezoelectric actuator including: a first piezoelectric vibrator including a first diaphragm and first piezoelectric elements that are provided on the first diaphragm and include a first electrode, a second electrode, and a piezoelectric material layer held by the first electrode and the second electrode; a second piezoelectric vibrator including a second diaphragm and second piezoelectric elements that are provided on the second diaphragm and include a first electrode, a second electrode, and a piezoelectric material layer held by the first electrode and the second electrode; and an inductor. The layout of the first piezoelectric vibrator in the first diaphragm is the same as the layout of the second piezoelectric vibrator in the second diaphragm. The positions of the first piezoelectric elements on the first diaphragm correspond to the positions of the second piezoelectric elements on the second diaphragm.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: April 9, 2019
    Assignee: Seiko Epson Corporation
    Inventor: Tomoaki Takahashi
  • Patent number: 10243137
    Abstract: A piezoelectric element includes a first electrode, a piezoelectric layer which is formed on the first electrode by using a solution method, and is formed from compound oxide which has a perovskite structure in which potassium, sodium, and niobium are provided, and a second electrode which is provided on the piezoelectric layer. The piezoelectric layer has a peak derived from a (200) plane and a peak derived from a (002) plane in an X-ray diffraction pattern obtained by ?-2? measurement.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: March 26, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Tomohiro Sakai, Koji Sumi, Tetsuya Isshiki, Toshiaki Takahashi, Tomokazu Kobayashi, Kazuya Kitada
  • Patent number: 10185863
    Abstract: The present disclosure discloses an ultrasonic transducer. The ultrasonic transducer includes a piezoelectric layer. The piezoelectric layer includes an array of piezoelectric posts, a plurality of emitting electrodes, and a plurality of receiving electrodes. The piezoelectric posts are configured for emitting and receiving ultrasonic wave. The material of each of the piezoelectric posts includes lead zirconate titanate piezoelectric ceramics. The emitting electrodes are formed on a lower surface of the piezoelectric layer by a sputtering process. The receiving electrodes are formed on an upper surface of the piezoelectric layer by the sputtering process. Each of the emitting electrodes and each of the receiving electrodes include lead, zirconium, titanium, and/or alloys thereof.
    Type: Grant
    Filed: April 19, 2017
    Date of Patent: January 22, 2019
    Assignee: NANCHANG O-FILM BIO-IDENTIFICATION TECHNOLOGY CO., LTD.
    Inventors: Wensi Sun, Anpeng Bai
  • Patent number: 10121956
    Abstract: An electroacoustic transducer includes: a polygonal-shaped laminated piezoelectric element including alternately stacked piezoelectric layers and electrode layers, with the piezoelectric layers placed between at least one pair of electrode layers having different polarities; and a circular vibration plate on which the laminated piezoelectric element is placed. Of the piezoelectric layers sandwiched between the at least one pair of electrode layers, the total volume (V) of those effective layers that overlap the at least one pair of electrode layers as viewed from the stacking direction satisfies the condition below: 0.2?R2×ts?V?2.0?R2×ts wherein ? represents the ratio of the circumference of a circle to its diameter, R represents the radius of the vibration plate, and ts represents the thickness of the vibration plate.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: November 6, 2018
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Takashi Tomita, Shigeo Ishii, Hiroshi Hamada, Yutaka Doshida
  • Patent number: 10079095
    Abstract: A capacitor includes a body including a plurality of dielectric layers and internal electrodes which are alternately stacked, and a compensation region formed in the interior of the body, the compensation region including portions of the plurality of dielectric layers and including a central portion and an end portion extended from the central portion. A thickness of the central portion of the compensation region is between 4 and 13 times as great as that of a dielectric layer among the plurality of dielectric layers on which the internal electrodes are formed.
    Type: Grant
    Filed: July 5, 2016
    Date of Patent: September 18, 2018
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Kyoung Jin Cha, Seung Ho Lee, Seung Heui Lee, Min Gon Lee
  • Patent number: 10020442
    Abstract: The present invention relates to a ceramic comprising (or consisting essentially of) a solid solution containing Bi, K, Ti and Fe (and optionally Pb) which exhibits piezoelectric behavior.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: July 10, 2018
    Assignee: Ionix Advanced Technologies Limited
    Inventors: Andrew John Bell, Timothy Comyn
  • Patent number: 10011111
    Abstract: A piezoelectric film of the present invention is a piezoelectric film including a perovskite oxide represented by the following formula (P), in which crystal phases of the perovskite oxide include tetragonal crystals and rhombohedral crystals at a ratio that satisfies the following formula (1). A1+?[(ZrxTi1?x)1?aNba]Oy??(P) 0.70?rhombohedral crystals/(rhombohedral crystals+tetragonal crystals)?0.95?? (1), where, in the formula (P), A is an A-site element primarily containing Pb, and Zr, Ti, and Nb are B-site elements. x is equal to or higher than 0.4 and lower than 1, excluding x of equal to or higher than 0.51 and equal to or lower than 0.53. a is equal to or higher than 0.08.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: July 3, 2018
    Assignee: FUJIFILM Corporation
    Inventors: Naoki Murakami, Takami Arakawa, Takamichi Fujii
  • Patent number: 10014463
    Abstract: A multilayer sintered body having alternately stacked Ni-based inner electrodes and piezoelectric ceramic layers. The piezoelectric ceramic layers contain a main ingredient of a perovskite compound containing Nb, K, Na, and Li, at least one element M1 selected from Nd and Dy, and at least one element M2 selected from Ga and Al. The element M2 content is 0.071 parts by mole or less per 1 part by mole of the Nb in a solution obtained through a dissolution process. This multilayer piezoelectric ceramic electronic component is manufactured through the cofiring of conductive films as a precursor of the inner electrodes and ceramic green sheets as a precursor of the piezoelectric ceramic layers in a reducing atmosphere in which the oxidation of Ni is inhibited.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: July 3, 2018
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Hideki Ishii, Shinichiro Kawada, Hiroyuki Hayashi, Tadashi Okuzawa, Shoichiro Suzuki
  • Patent number: 10003889
    Abstract: According to an embodiment, a MEMS transducer includes a stator, a rotor spaced apart from the stator, and a multi-electrode structure including electrodes with different polarities. The multi-electrode structure is formed on one of the rotor and the stator and is configured to generate a repulsive electrostatic force between the stator and the rotor. Other embodiments include corresponding systems and apparatus, each configured to perform corresponding embodiment methods.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: June 19, 2018
    Assignee: INFINEON TECHNOLOGIES AG
    Inventor: Stefan Barzen
  • Patent number: 9950524
    Abstract: A PZT-film laminated structure includes a substrate, a lower electrode on the substrate, an orientation control layer on the lower electrode, a PZT layer on the orientation control layer, and an upper electrode on the PZT layer. The PZT layer has a (100) or (001) main orientation in which a peak intensity of PZT (100) or (001) is 90% or greater relative to a peak intensity of all PZT peaks in an X-ray diffraction measurement. A ratio of a total value of a secondary ion intensity of Cl relative to a total value of a secondary ion intensity of Ti in the PZT layer is equal to or smaller than 0.03 when the secondary ion intensity of Cl and the secondary ion intensity of Ti in the PZT layer are measured in a direction of thickness of the PZT layer with a magnetic-field secondary ion mass spectrometry.
    Type: Grant
    Filed: December 23, 2016
    Date of Patent: April 24, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventors: Masaru Shinkai, Yoshikazu Akiyama, Satoshi Mizukami
  • Patent number: 9938197
    Abstract: A lead-free piezoelectric ceramic composition includes a first crystal phase made of an alkali niobate/tantalate type perovskite oxide having piezoelectric properties, and a second crystal phase made of an M-Ti—O spinel compound (where the element M is a monovalent to quadrivalent element).
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: April 10, 2018
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Masato Yamazaki, Takayuki Matsuoka, Kazuaki Kitamura, Hisashi Kozuka, Hideto Yamada, Toshiaki Kurahashi, Yasuyuki Okimura, Kazushige Ohbayashi, Takashi Kasashima
  • Patent number: 9873248
    Abstract: The present invention aims at providing a piezoelectric element with less characteristic variations with time, and a liquid discharge head and a recording device each using the piezoelectric element. The piezoelectric element 30 of the present invention is the piezoelectric body 30 (piezoelectric ceramic layer 21b) containing a potassium sodium niobate composition as a primary component. The piezoelectric body extends in a planar direction. A compressive stress is applied in the planar direction. A phase transition point between a tetragonal crystal system and an orthorhombic crystal system is ?20° C. or below.
    Type: Grant
    Filed: November 28, 2014
    Date of Patent: January 23, 2018
    Assignee: KYOCERA Corporation
    Inventors: Makoto Higashibeppu, Shuuhei Tabata, Tomonori Eguchi, Izuru Sato
  • Patent number: 9780295
    Abstract: A lead-free piezoelectric ceramic material has the general chemical formula xBiCoO3-y(Bi0.5Na0.5)TiO3-z(Bi0.5K0.5)TiO3, xBiCoO3-y(Bi0.5Na0.5)TiO3-zNaN-bO3, xBiCoO3-y(Bi0.5Na0.5)TiO3-zKNbO3, xBiCoO3-yBi(Mg0.5Ti0.5)O3-z(Bi0.5Na0.5)TiO3, xBiCoO3-yBa-TiO3-z(Bi0.5Na0.5)TiO3, or xBiCoO3-yNaNbO3-zKNbO3; wherein x+y+z=1, and x, y, z?0.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: October 3, 2017
    Assignees: OREGON STATE UNIVERSITY OFFICE OF TECHNOLOGY TRANSFER, HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Eric Andrew Patterson, David Cann, Peter Mardilovich
  • Patent number: 9755137
    Abstract: A piezoelectric device has a piezoelectric ceramic layer obtained by sintering a piezoelectric ceramic composition that contains an alkali-containing niobate type perovskite composition which is represented by (LilNamK1-l-m)n(Nb1-oTao)O3 (wherein 0.04?l?0.1, 0?m?1, 0.95?n?1.05, 0?o?1) and Ag component, as well as a conductor layer sandwiching the piezoelectric ceramic layer. The piezoelectric ceramic layer has Ag segregated in voids present in a sintered compact of the perovskite composition in terms of oxides relative to the perovskite composition.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: September 5, 2017
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Shinichiro Ikemi, Yutaka Doshida
  • Patent number: 9722170
    Abstract: There is provided a piezoelectric material not containing any lead component, having stable piezoelectric characteristics in an operating temperature range, a high mechanical quality factor, and satisfactory piezoelectric characteristics. The piezoelectric material includes a main component containing a perovskite-type metal oxide that can be expressed using the following general formula (1), and subcomponents containing Mn, Li, and Bi. When the metal oxide is 100 parts by weight, the content of Mn on a metal basis is not less than 0.04 parts by weight and is not greater than 0.36 parts by weight, content ? of Li on a metal basis is not less than 0.0013 parts by weight and is not greater than 0.0280 parts by weight, and content ? of Bi on a metal basis is not less than 0.042 parts by weight and is not greater than 0.850 parts by weight (Ba1-xCax)a(Ti1-y-zZrySnz)O3??(1) (in the formula (1), 0.09?x?0.30, 0.074<y?0.085, 0?z?0.02, and 0.986?a?1.02).
    Type: Grant
    Filed: July 10, 2014
    Date of Patent: August 1, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takayuki Watanabe, Hidenori Tanaka, Shunsuke Murakami, Tatsuo Furuta, Hisato Yabuta
  • Patent number: 9705473
    Abstract: A resonant circuit comprises an input terminal and an output terminal and at least: a group of N resonators, where N?1, the resonators having the same resonance frequency and the same antiresonance frequency; a first and a second impedance matching element having a non-zero reactance, the first element being in series with the group of resonators, and the second element being in parallel with the group of resonators, the resonant circuit comprising: first means for controlling the group of resonators, enabling the static capacitance of the group to be fixed at a first value; second control means, enabling the impedance of the first impedance matching element and that of the second element to be fixed at second values; the first and second values being such that the triplet of values composed of the static capacitance of the group, the impedance of the first element, and the impedance of the second element can be used to determine the following triplet of parameters: the characteristic impedance Zc of the ass
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: July 11, 2017
    Assignee: Commissariat A'Lenergie Atomique et aux Energies Alternatives
    Inventors: Jean-Baptiste David, Alexandre Reinhardt
  • Patent number: 9680086
    Abstract: The present invention provides a piezoelectric material which has excellent insulating and piezoelectric properties and which contains no lead and potassium and also provides a piezoelectric element and a multilayered piezoelectric element each using the above piezoelectric material. The piezoelectric material is a perovskite-type metal oxide represented by the following general formula (1). (1?x){(NayBa1-z)(Nb7Ti1-z)O3}-xBiFeO3??(1) In the formula, 0<x?0.015, 0.80?y?0.95, 0.85?z?0.95 are satisfied.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: June 13, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shunsuke Murakami, Takayuki Watanabe, Makoto Kubota
  • Patent number: 9663871
    Abstract: A crystal production method according to the present invention includes a film formation and crystallization step of spraying a raw material powder containing a raw material component to form a film containing the raw material component on a seed substrate containing a single crystal at a predetermined single crystallization temperature at which single crystallization of the raw material component occurs, and crystallizing the film containing the raw material while maintaining the single crystallization temperature. In the film formation and crystallization step, preferably, the single crystallization temperature is 900° C. or higher. Furthermore, in the film formation and crystallization step, preferably, the raw material powder and the seed substrate are each a nitride or an oxide.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: May 30, 2017
    Assignee: NGK Insulators, Ltd.
    Inventors: Nobuyuki Kobayashi, Kazuki Maeda, Koichi Kondo, Tsutomu Nanataki, Katsuhiro Imai, Jun Yoshikawa
  • Patent number: 9666784
    Abstract: The piezoelectric body is configured to have a layered structure such that a plurality of unit layers are stacked in a film thickness direction, and each of the unit layers is formed of a first layer on which the displacement is relatively easy to occur, and a second layer which has a high concentration of Zr as compared with the first layer. In addition, when composition ratio Ti/(Zr+Ti) of Zr to Ti in each of the first layer and the second layer is set as Cr1 and Cr2, the composition ratio of each layer is adjusted so as to satisfy the following conditions (1) to (3). 0.41?Cr1?0.81??(1) 0.1?Cr1?Cr2?0.
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: May 30, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Motoki Takabe, Eiju Hirai, Toshihiro Shimizu, Naoto Yokoyama, Eiji Osawa
  • Patent number: 9614142
    Abstract: A piezoelectric ceramic composition contains a perovskite composition which is represented by (Pba·Rex){Zrb·Tic, ·(Ni1/3Nb2/3)d·(Zn1/3Nb2/3)e}O3 (wherein Re represents La and/or Nd, and a-e and x satisfy the following conditions 0.95?a?1.05, 0?x?0.05, 0.35?b?0.45, 0.35?c?0.45, 0<d?0.10, 0.07?e?0.20 and b+c+d+e=1) and 0.05-0.3% by mass of an Ag component in terms of oxides relative to the perovskite composition.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: April 4, 2017
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Shinichiro Ikemi, Yutaka Doshida
  • Patent number: 9601275
    Abstract: A dielectric ceramic composition includes a main component comprising (1-x)BaTiO3-x(Na1-yKy)NbO3, where 0.005?x?0.5 and 0.3?y?1.0; a first subcomponent comprising an element selected from the group consisting of Mn, V, Cr, Fe, Ni, Co, Cu and Zn; and a second subcomponent comprising SiO2.
    Type: Grant
    Filed: October 28, 2015
    Date of Patent: March 21, 2017
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Seok-Hyun Yoon, Yun-Jung Park, Doo-Young Kim, Song-Je Jeon, Chang-Hun Kim
  • Patent number: 9571709
    Abstract: In a piezoelectric device, a first electrode and a second electrode are disposed to be opposed to each other on plate surfaces of the piezoelectric device, a first electrode plane of the piezoelectric device is fixedly bonded to a plate surface of a vibrating plate, a piezoelectric material forming the piezoelectric device is polarized in a direction parallel to the first electrode plane, the piezoelectric device is fixed to a base through a second electrode plane of the piezoelectric device, and the piezoelectric device generates a thickness-shear vibration with the fixed second electrode plane being a reference plane. The piezoelectric vibration generated by the piezoelectric device generates a flexural vibration in the vibrating plate, to thereby remove dust adhering to a surface of the vibrating plate.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: February 14, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Toshihiro Ifuku, Tatsuo Furuta, Hiroshi Saito, Kenichi Takeda
  • Patent number: 9537083
    Abstract: Provided is a piezoelectric composition containing a major component that is a perovskite-type oxide which is represented by the general formula ABO3, which contains no Pb, and which has A-sites containing Bi, Na, and K and B-sites containing Ti. The Ti is partly substituted with a transition metal element Me that is at least one selected from the group consisting of Mn, Cr, Fe, and Co. The content of Bi and the transition metal element Me in the perovskite-type oxide, which is the major component, is 6 mole percent to 43 mole percent in terms of Biu1MeO3.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: January 3, 2017
    Assignee: TDK CORPORATION
    Inventors: Taku Masai, Masamitsu Haemori, Masahito Furukawa, Junichi Yamazaki, Kouhei Ohhashi
  • Patent number: 9520855
    Abstract: A bulk acoustic wave (BAW) resonator includes a first electrode; a second electrode; and a piezoelectric layer disposed between the first and second electrodes. The piezoelectric layer includes a piezoelectric material doped with at least one rare earth element. In an embodiment, the BAW resonator includes a recessed frame element disposed over a surface of at least one of the first and second electrodes. In another embodiment, the BAW resonator includes a raised frame element disposed over a surface of at least one of the first and second electrodes. In yet another embodiment, the BAW resonator includes both the raised and recessed frame elements.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: December 13, 2016
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Chris Feng, John Choy, Phil Nikkel, Kevin J. Grannen, Tina L. Lamers
  • Patent number: 9496485
    Abstract: A piezoelectric material is expressed as a mixed crystal including a complex oxide having a perovskite structure and a rhombohedral structure and a complex oxide having a perovskite structure and a tetragonal structure, and the molar ratio of the complex oxide having a rhombohedral structure to the complex oxide having a tetragonal structure (rhombohedral crystal/tetragonal crystal) is 0.54 to less than 1.20.
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: November 15, 2016
    Assignee: Seiko Epson Corporation
    Inventor: Tetsuya Isshiki
  • Patent number: 9491548
    Abstract: A parametric system for generating audible sound, comprising a transducer array configured to emit modulated ultrasonic waves in a converging wave pattern toward a focal volume, where the modulated ultrasonic waves are configured to demodulate to generate audible sound waves in the focal volume, and where the generated audible sound waves emanate from the focal volume with a diverging wave pattern.
    Type: Grant
    Filed: August 24, 2012
    Date of Patent: November 8, 2016
    Assignee: CONVEY TECHNOLOGY, INC.
    Inventors: Luke Batchelder, J. Samuel Batchelder
  • Patent number: 9450172
    Abstract: This invention provides an electromechanical device comprising an active material comprising a metal oxide such as Ce0.8Gd0.2O1.9 wherein the elastic modulus of metal oxide can be modulated by applying external electric field. The Ce0.8Gd0.2O1.9 layer in a substrate\electrode\Ce0.8Gd0.2O1.9\electrode structure or conductive substrate\Ce0.8Gd0.2O1.9\electrode structure develops a stress upon applying an electric field. This invention provides methods for tailoring the elastic modulus of materials using an electric field for the generation of an electromechanical response.
    Type: Grant
    Filed: October 5, 2011
    Date of Patent: September 20, 2016
    Assignee: YEDA RESEARCH AND DEVELOPMENT CO. LTD.
    Inventors: Igor Lubomirsky, Roman Korobko, Anna Kossoy, Harry L. Tuller
  • Patent number: 9431242
    Abstract: To provide a PBNZT ferroelectric film capable of preventing sufficiently oxygen ion deficiency. The PBNZT ferroelectric film according to an embodiment of the present invention is a ferroelectric film including a perovskite-structured ferroelectric substance represented by ABO3, wherein the perovskite-structured ferroelectric substance is a PZT-based ferroelectric substance containing Pb2+ as A-site ions and containing Zr4+ and Ti4+ as B-site ions, and the A-site contains Bi3+ as A-site compensation ions and the B-site contains Nb5+ as B-site compensation ions.
    Type: Grant
    Filed: July 23, 2010
    Date of Patent: August 30, 2016
    Assignee: YOUTEC CO., LTD.
    Inventors: Takeshi Kijima, Yuuji Honda
  • Patent number: 9406866
    Abstract: A piezoelectric device is provided with: a piezoelectric ceramic layer that is obtained by firing a piezoelectric ceramic composition which contains a perovskite composition and an Ag component; and a conductor layer that sandwiches the piezoelectric ceramic layer, wherein Ag is segregated in voids in a sintered body of the perovskite composition in the piezoelectric ceramic layer. The piezoelectric ceramic composition preferably contains a perovskite composition which is represented by (Pba.Rex){Zrb.Tic,.(Ni1/3Nb2/3)d.(Zn1/3Nb2/3)e}O3 (wherein Re represents La and/or Nd, and a-e and x satisfy the following conditions 0.95?a?1.05, 0?x?0.05, 0.35?b<0.45, 0.35?c?0.45, 0?d?0.10, 0.07?e?0.20 and b+c+d+e=1) and 0.05-0.3% by mass of an Ag component in terms of oxides relative to the perovskite composition.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: August 2, 2016
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Shinichiro Ikemi, Yutaka Doshida
  • Patent number: 9362481
    Abstract: A continuous piezoelectric film can include a plurality of fibers, each fiber including a polypeptide, wherein molecules of the polypeptide have electric dipole moments that are aligned such that the piezoelectric fiber provides a piezoelectric effect. The continuous piezoelectric film has at least one piezoelectric constant d31 or d33 that is at least 1 pC/N. The continuous piezoelectric film can be prepared hot pressing a mat of aligned piezoelectric fibers.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: June 7, 2016
    Assignee: The Johns Hopkins University
    Inventors: Michael Yu, Kailiang Ren, James E. West
  • Patent number: 9356224
    Abstract: The present invention provides for a composition comprising a thin film of BiFeO3 having a thickness ranging from 20 nm to 300 nm, a first electrode in contact with the BiFeO3 thin film, and a second electrode in contact with the BiFeO3 thin film; wherein the first and second electrodes are in electrical communication. The composition is free or essentially free of lead (Pb). The BFO thin film is has the piezoelectric property of changing its volume and/or shape when an electric field is applied to the BFO thin film.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: May 31, 2016
    Assignee: The Regents of the University of California
    Inventors: Robert J. Zeches, Lane W. Martin, Ramamoorthy Ramesh
  • Patent number: 9324931
    Abstract: A piezoelectric device includes a first electrode film, a piezoelectric film disposed on the first electrode film, and a second electrode film disposed on the piezoelectric film. At least one of the first and second electrode films is composed of an alloy, and a main component of the alloy is a metal selected from the group consisting of Ti, Al, Mg, and Zn. The piezoelectric film has a main composition represented by (K1-x-y-w-vNaxLiyBawSrv)m(Nb1-z-uTazZru)O3 (1), where x, y, z, w, v, u, and m in formula (1) satisfy 0.4<x?0.7, 0.02?y?0.11, 0.5?x+y<0.75, 0<z?0.28, 0<w?0.02, 0.02?v?0.11, 0.02?u?0.11, and 0.95?m<1.2, and contains 1% by mass or less of MnO relative to the main composition.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: April 26, 2016
    Assignee: TDK CORPORATION
    Inventors: Masahito Furukawa, Tomohisa Azuma, Taku Masai
  • Patent number: 9306149
    Abstract: Provided is a piezoelectric material that achieves both high piezoelectric performance and high Curie temperature. In addition, provided are a piezoelectric element, a liquid discharge head, an ultrasonic motor, and a dust removing device, which use the piezoelectric material. The piezoelectric material includes a perovskite-type metal oxide that is expressed by the following general formula (1): xBaTiO3-yBiFeO3-zBi(M0.5Ti0.5)O3 (1), where M represents at least one type of element selected from the group consisting of Mg and Ni, x satisfies 0.25?x?0.75, y satisfies 0.15?y?0.70, z satisfies 0.05?z?0.60, and x+y+z=1 is satisfied.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: April 5, 2016
    Assignees: Canon Kabushiki Kaisha, University of Yamanashi
    Inventors: Jumpei Hayashi, Hisato Yabuta, Makoto Kubota, Mikio Shimada, Satoshi Wada, Ichiro Fujii, Ryuta Mitsui, Nobuhiro Kumada
  • Patent number: 9299911
    Abstract: A piezoelectric thin-film multilayer body includes a substrate, an adhesive layer on the substrate, a lower electrode layer on the adhesive layer, and a lead-free piezoelectric thin-film layer on the lower electrode layer. The lead-free piezoelectric thin-film layer is composed of lithium potassium sodium niobate (composition formula (NaxKyLiz)NbO3, 0<x<1, 0<y<1, 0?z?1, x+y+z=1). The maximum height Rz of a roughness of an adhesive-layer-facing surface of the substrate is 2 nm or less. The adhesive layer is composed of a non-crystalline oxide of a Group 4 element or a non-crystalline oxide of a Group 5 element. The adhesive layer has a thickness of 1 nm or more and 2 nm or less and is equal to or more than the maximum height Rz of the roughness of the surface of the substrate.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: March 29, 2016
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Kazufumi Suenaga, Kenji Shibata, Kazutoshi Watanabe, Fumimasa Horikiri, Masaki Noguchi
  • Patent number: 9294846
    Abstract: A piezoelectric vibration element which includes at least a plurality of electrodes and a plurality of piezoelectric layers alternately disposed in a first direction, and performs bending vibration in the first direction so as to change amplitude in a second direction vertical to the first direction by inputting an electric signal, and in which a center of a facing portion in the second direction is provided at a different position from a center of the piezoelectric vibration element in the second direction, the facing portion including a portion in which one of the piezoelectric layers interposed between the electrodes that are disposed so as to be adjacently opposed to each other, and a piezoelectric vibration device and a portable terminal using the piezoelectric vibration element are provided.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: March 22, 2016
    Assignee: KYOCERA CORPORATION
    Inventor: Satoru Iwasaki
  • Patent number: 9252685
    Abstract: Provided is a dust removing device that can be designed and controlled appropriately and has high dust removal performance even at low temperature, and an imaging device using the dust removing device. In a dust removing device to be set on a base, including a piezoelectric element formed of a piezoelectric material and a pair of opposing electrodes, a vibration member, and a fixation member containing at least a high molecular compound component, a phase transition temperature T from a first ferroelectric crystal phase to a second ferroelectric crystal phase of the piezoelectric material is set to ?60° C.?T??5° C., and whereby, the dust removing device can be designed and controlled appropriately and high dust removal performance can be obtained even at low temperature.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: February 2, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshihiro Ifuku, Yasushi Shimizu, Tatsuo Furuta, Takanori Matsuda, Makoto Kubota, Jumpei Hayashi
  • Patent number: 9240542
    Abstract: There is provided a piezoelectric ceramic having a high and stable piezoelectric constant and a high and stable mechanical quality factor in a wide operating temperature range, and a piezoelectric element according to the present invention includes a main component containing a perovskite type metal oxide having the following general formula (1) or (2); and Mn as a first auxiliary component, (Ba1-xCax)a(Ti1-y-zSnyZrz)O3??(1) (0.08?x?0.20, 0.01?y?0.04, 0<z?0.04) (Ba1-xCax)a(Ti1-ySny)O3??(2) (0.08?x?0.20, 0.01?y?0.04) wherein the amount b (mol) of Mn per mole of the metal oxide is in the range of 0.0048?b?0.0400, and the value a of the general formula (1) or (2) is in the range of 0.9925+b?a?1.0025+b.
    Type: Grant
    Filed: April 23, 2013
    Date of Patent: January 19, 2016
    Assignee: Canon Kabushiki Kiasha
    Inventors: Hiroshi Saito, Kanako Oshima, Kaoru Miura, Hisato Yabuta, Jumpei Hayashi
  • Patent number: 9231188
    Abstract: Provided are a barium titanate-based piezoelectric ceramics having satisfactory piezoelectric performance and a satisfactory mechanical quality factor (Qm), and a piezoelectric element using the same. Specifically provided are a piezoelectric ceramics, including: crystal particles; and a grain boundary between the crystal particles, in which the crystal particles each include barium titanate having a perovskite-type structure and manganese at 0.04% by mass or more and 0.20% by mass or less in terms of a metal with respect to the barium titanate, and the grain boundary includes at least one compound selected from the group consisting of Ba4Ti12O27 and Ba6Ti17O40, and a piezoelectric element using the same.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: January 5, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tatsuya Suzuki, Masami Tsukamoto, Mikio Shimada, Toshihiro Ifuku, Takanori Matsuda, Makoto Kubota, Jumpei Hayashi