Patents Examined by Thomas M. Dougherty
  • Patent number: 10932755
    Abstract: Disclosed herein is a multi-row ultrasonic probe of which a manufacturing failure rate can be decreased. The ultrasonic probe includes a piezoelectric layer configured to generate ultrasonic waves, a sound layer provided on a rear side of the piezoelectric layer, a flexible printed circuit board provided on a rear side of the sound layer, and a sound absorption layer configured to absorb the ultrasonic waves generated by the piezoelectric layer and propagating toward a rear surface of the ultrasonic probe, the sound absorption layer being provided on a rear surface of the flexible printed circuit board. The piezoelectric layer includes a kerf configured to divide the piezoelectric layer in a direction of elevation. The sound layer includes a funnel extending in a direction extending from a front side of the sound layer to the rear side of the sound layer to divide the sound layer.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: March 2, 2021
    Assignee: SAMSUNG MEDISON CO., LTD.
    Inventors: Jin Ho Gu, Sung Do Kwon, Seong Jin Kim, Joong Hyun Park
  • Patent number: 10937942
    Abstract: A piezoelectric element includes a substrate, a first electrode formed on the substrate, a piezoelectric layer, which is a layered structure of a plurality of piezoelectric films each containing potassium, sodium, and niobium, formed on the first electrode, and a second electrode formed on the piezoelectric layer. A sodium concentration in the piezoelectric layer has a Na local maximum value, which is a local maximum value of the sodium concentration, in a first piezoelectric film, which is among the plurality of piezoelectric films, in the vicinity of the first electrode, a sodium concentration gradient decreasing from the Na local maximum value toward the second electrode, and a Na local minimum value, which is a local minimum value of the sodium concentration, near a boundary between the first piezoelectric film and a second piezoelectric film formed immediately above the first piezoelectric film.
    Type: Grant
    Filed: March 9, 2018
    Date of Patent: March 2, 2021
    Inventors: Kazuya Kitada, Koji Sumi, Tomohiro Sakai, Toshiaki Takahashi, Tsutomu Asakawa
  • Patent number: 10938367
    Abstract: An apparatus includes a substrate, a thin film piezoelectric layer, a transducer, and a low resistivity layer. The thin film piezoelectric layer is over the substrate, the transducer includes a number of electrodes in contact with the thin film piezoelectric layer and configured to transduce an acoustic wave in the thin film piezoelectric layer. The low resistivity layer is between at least a portion of the substrate and the thin film piezoelectric layer. By providing the low resistivity layer between at least a portion of the substrate and the thin film piezoelectric layer, a spurious response of the apparatus may be significantly reduced, thereby improving the performance thereof.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: March 2, 2021
    Assignee: Qorvo US, Inc.
    Inventors: Kushal Bhattacharjee, Sergei Zhgoon
  • Patent number: 10925628
    Abstract: Various devices related to a therapeutic ultrasound device for use during a medical procedure to cauterize tissue are disclosed. The device includes an apparatus for tissue engagement. The apparatus includes a first jaw and a second jaw that each includes a body portion and an ear located adjacent to the body portion. The body portion is configured to receive an acoustic stack and the ear includes a slot configured to receive a first pin. The first and second jaws include an opening located between the body portion and the ear. The opening is configured to receive a second pin such that the first jaw and the second jaw are configured to rotate about the second pin.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: February 23, 2021
    Assignee: Novuson Surgical, Inc.
    Inventors: Stuart B. Mitchell, Eric Hadford, Daniel Baker
  • Patent number: 10925629
    Abstract: Various devices related to a therapeutic ultrasound device for use during a medical procedure to cauterize tissue are disclosed. The high intensity focused ultrasound device can include a transducer for producing high intensity focused ultrasound. The transducer includes a shell configured to receive an acoustic stack. The acoustic stack includes a piezoelectric layer, a matching layer, and a plurality of electrodes. The transducer includes an air-filled pocket formed between the inner surface of the shell and the piezoelectric layer of the acoustic stack, wherein the air-filled pocket is configured to ensure high efficiency of the transducer.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: February 23, 2021
    Assignee: Novuson Surgical, Inc.
    Inventors: Stuart B. Mitchell, Eric Hadford, Daniel Baker
  • Patent number: 10924085
    Abstract: A guided acoustic wave device includes a substrate, a lithium tantalate layer on the substrate, and a transducer on the lithium tantalate film. The lithium tantalate has a crystalline orientation defined by (YXl)?°, where ? is between 10° and 37°. The inventors discovered that limiting the crystalline orientation of the lithium tantalate in this manner provides significant increases in the electromechanical coupling coefficient of the acoustic wave device, thereby increasing bandwidth and improving performance.
    Type: Grant
    Filed: October 17, 2017
    Date of Patent: February 16, 2021
    Assignee: Qorvo US, Inc.
    Inventors: Shogo Inoue, Marc Solal
  • Patent number: 10924086
    Abstract: A device including a piezoelectric substrate, an interdigital transducer (IDT), and an antireflective structure is disclosed herein. The piezoelectric substrate has a front-side surface and a smoothed back-side surface. The IDT is on the front-side surface of the piezoelectric substrate. The antireflective structure is over at least a portion of the smoothed back-side surface of the piezoelectric substrate. By having the antireflective structure on at least a portion of the smoothed back-side surface of the piezoelectric substrate, reflection of spurious bulk acoustic waves toward the front-side surface of the piezoelectric substrate can be reduced and/or eliminated to lessen interference with surface acoustic waves.
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: February 16, 2021
    Assignee: Qorvo US, Inc.
    Inventors: Marc Solal, Charles E. Carpenter, Timothy Daniel, Shogo Inoue, Tom Moonlight
  • Patent number: 10916693
    Abstract: A piezoelectric element has a diaphragm, a first electrode on the diaphragm, a piezoelectric layer on the first electrode, and a second electrode on the piezoelectric layer. The piezoelectric layer is a stack of multiple piezoelectric films and is made of a perovskite composite oxide containing lead, zirconium, and titanium and represented by the general formula ABO3, with the molar ratio of the A-site to the B-site (A/B) in the perovskite composite oxide being 1.14 or more and 1.22 or less. In current-time curve measurement, the activation energy calculated from relaxation current using an Arrhenius plot is 0.6 [eV] or less. The relaxation current is the amount of current at the time at which a downward trend in current turns upward.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: February 9, 2021
    Inventors: Takayuki Yonemura, Chikara Kojima, Xiaoxing Wang, Tetsuya Isshiki, Yasuhiro Itayama
  • Patent number: 10916692
    Abstract: The present disclosure relates to piezoelectric detection circuits, methods and display devices. A piezoelectric detection circuit is provided that may comprise: a piezoelectric device to convert a pressure into a direct current (DC) signal and to convert a sound wave into an alternating current (AC) signal; a comparison circuit configured to output the direct current signal to a signal processor in a case where the piezoelectric device outputs DC signal, and to output the alternating current signal to the mixer in a case where the piezoelectric device outputs AC signal; the mixer configured to perform a mixing process on the AC signal to generate a mixed signal; and the signal processor configured to process the mixed signal output from the mixer or the direct current signal output from the comparison circuit, to detect the pressure or the sound.
    Type: Grant
    Filed: March 12, 2018
    Date of Patent: February 9, 2021
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Lijun Zhao, Haisheng Wang, Yingming Liu, Yuzhen Guo, Yanan Jia, Changfeng Li, Pinchao Gu, Yunke Qin
  • Patent number: 10917024
    Abstract: A vibration-type drive apparatus, which increases productivity and also prevents undesired vibration from occurring during operation, includes an elastic body, a vibrating body having an electro-mechanical energy conversion element mounted on the elastic body, a driven body that is brought into pressure contact with the vibrating body, and a pressurizing member that brings the driven body into pressure contact with the vibrating body. Relative positions of the vibrating body and the driven body change due to vibrations excited in the vibrating body. The pressurizing member has a positioning portion, and the driven body has a fitting-receiving portion that is to be fitted onto the positioning portion. During operation, the positioning portion and the fitting-receiving portion are not in contact with each other.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: February 9, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kei Suefuji
  • Patent number: 10905334
    Abstract: The invention provides an electroactive material (preferably electroactive polymer) sensor system, comprising an electroactive material sensor (22) and a control system (28) for performing measurements relating to the impedance of the electroactive material sensor at at least first and second different frequencies. From these measurements a temperature at the sensor and an external pressure or force applied to the sensor can be determined. The sensor can thus be used as a pressure sensor and as a temperature sensor. When used in combination with actuation, an electroactive material actuator with integrated temperature sensing functionality is able to measure the temperature at the exact actuator position, which is always closer than an external thermocouple.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: February 2, 2021
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Daan Anton Van Den Ende, Mark Thomas Johnson, Achim Hilgers
  • Patent number: 10910548
    Abstract: An ultrasonic device includes: an element substrate including an ultrasonic transducer and a first connection electrode connected to the ultrasonic transducer; a reinforcing plate that is bonded to the element substrate to reinforce the element substrate; and a second connection electrode provided on the reinforcing plate. The first and second connection electrodes are connected to each other in a bonding portion between the element substrate and the reinforcing plate.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: February 2, 2021
    Inventor: Chikara Kojima
  • Patent number: 10898404
    Abstract: An artificial muscle includes a first stress transmission part and a second stress transmission part, which are spaced apart from each other in a first direction, a contraction coil spring provided between the first and second stress transmission parts to pull the first and second stress transmission parts, and an expansion part provided between the first and second stress transmission parts to push the first and second stress transmission parts. The contraction coil spring has a shape of a spring progressing in the first direction, and the contraction coil spring is contracted by heat.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: January 26, 2021
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jeong Mook Lim, Sung Ryul Yun, Ki-Uk Kyung, Seongcheol Mun
  • Patent number: 10897005
    Abstract: A vibrating device includes a piezoelectric element, a resin member having electric insulation, a vibrating member made of metal, a first adhesive layer, and a second adhesive layer. The resin member includes a first principal surface and a second principal surface opposing each other. The vibrating member includes a third principal surface and a fourth principal surface opposing each other. The first adhesive layer joins the piezoelectric element and the first principal surface. The second adhesive layer joins the second principal surface and the third principal surface. An area of the resin member is greater than an area of the piezoelectric element, and an area of the vibrating member is greater than the area of the piezoelectric element. An area where the second adhesive layer adheres to the vibrating member is greater than an area where the first adhesive layer adheres to the resin member.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: January 19, 2021
    Assignee: TDK CORPORATION
    Inventors: Kaoru Kijima, Tatsuya Taki, Shunsuke Ueno, Atsushi Ezawa, Haruna Sumi, Tomohiro Takeda
  • Patent number: 10897004
    Abstract: A piezoelectric drive device including: laminated piezoelectric element including a first end face and a second end face opposed to the first end face; a weight member attached to the first end face; and a shaft attached to the second end face, in which a moving member, engaged to the shaft movable in an axial direction, is moved by activating the laminated piezoelectric element. Inside the laminated piezoelectric element, a first internal electrode and a second internal electrode, respectively having a plane surface approximately perpendicular to the first end face and the second end face, are laminated in Y axial direction, approximately perpendicular to the first internal electrode and the second internal electrode with a piezoelectric layer in-between. The piezoelectric drive device, in which the laminated piezoelectric element is difficult to bend, even when the load is applied to the shaft from a lateral direction, is provided.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: January 19, 2021
    Assignee: TDK CORPORATION
    Inventors: Mitsunao Homma, Masahiro Hosokawa
  • Patent number: 10894407
    Abstract: There is provided a device including: an actuator, a first flexible substrate and a second flexible substrate. The actuator includes a substrate; a first piezoelectric element and a second piezoelectric element that are formed on one surface of the substrate; a first contact connected to the first piezoelectric element; a second contact separated in a thickness direction of the substrate from the first contact and connected to the second piezoelectric element. The first flexible substrate is connected to the first contact; and the second flexible substrate is connected to the second contact.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: January 19, 2021
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventor: Rui Wang
  • Patent number: 10888898
    Abstract: An ultrasound transducer with at least one piezoelectric element configured to convert received acoustic signals into an electric potential, a shield connectable to ground and overlying the at least one piezoelectric element through which the acoustic signals pass before being received by the at least one piezoelectric element, the shield having acoustic conductivity and electrical attenuation characteristics that enable the acoustic signals to propagate therethrough while reducing a 100 volt per centimeter electric field to below a threshold level so that the piezoelectric element is exposed to a threshold electrical potential at least less than or equal to 10 ?V, and a housing accommodating the at least one piezoelectric element and shield.
    Type: Grant
    Filed: March 12, 2018
    Date of Patent: January 12, 2021
    Assignee: ENDRA Life Sciences Inc.
    Inventors: Michael M. Thornton, Stanley Emil Jelic
  • Patent number: 10892733
    Abstract: A microelectromechanical system (MEMS) resonator includes a degenerately-doped single-crystal silicon layer and a piezoelectric material layer disposed on the degenerately-doped single-crystal silicon layer. An electrically-conductive material layer is disposed on the piezoelectric material layer opposite the degenerately-doped single-crystal silicon layer, and patterned to form first and second electrodes.
    Type: Grant
    Filed: April 6, 2018
    Date of Patent: January 12, 2021
    Assignee: SITIME CORPORATION
    Inventors: Joseph C. Doll, Paul M. Hagelin, Ginel C. Hill, Nicholas Miller, Charles I. Grosjean
  • Patent number: 10879867
    Abstract: A structure of an acoustic transducer array probe for transmission of acoustic waves from a front radiation surface into an acoustic load material, where said acoustic waves can have frequencies in a high frequency (HF) band and further lower frequency (LF1, . . . , LFn, . . . , LFN) bands with N?1, arranged in order of decreasing center frequency. The acoustic waves are transmitted from separate high and lower frequency arrays stacked together with matching layers in a thickness dimension into a layered structure, with at least a common radiation surface for said high and lower frequency bands. At least for said common radiation surface at least one lower frequency LFn electro-acoustic structure (n=1, . . . , N) comprises a piezoelectric array with an acoustic isolation section to its front face.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: December 29, 2020
    Assignee: SURF Technology AS
    Inventors: Bjorn Atle Johan Angelsen, Ola Finneng Myhre
  • Patent number: 10873315
    Abstract: A piezoelectric vibrating piece includes a piezoelectric substrate and excitation electrodes. The excitation electrode includes a main thickness portion and an inclined portion, the main thickness portion has a constant thickness, the inclined portion is formed on a peripheral area of the main thickness portion, the inclined portion gradually decrease in thickness from a part contacting the main thickness portion toward an outermost periphery of the excitation electrode. The inclined portion has a width as an inclination width in a length of 0.84 times or more and 1.37 times or less of a first flexural wavelength and 2.29 times or more and 3.71 times or less of a second flexural wavelength, the first flexural wavelength is a wavelength of a flexure vibration at a fundamental wave of the thickness-shear vibration, the second flexural wavelength is a wavelength of a flexure vibration at a third harmonic of the thickness-shear vibration.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: December 22, 2020
    Assignee: NIHON DEMPA KOGYO CO., LTD.
    Inventors: Shigetaka Kaga, Kazuhiro Hirota