Patents by Inventor Julius Koskela

Julius Koskela has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220247384
    Abstract: Acoustic resonator devices and acoustic filter devices. An acoustic resonator includes a piezoelectric plate having front and back surfaces. The back surface is attached to a surface of a substrate, and a portion of the piezoelectric plate forms a diaphragm spanning a cavity in the substrate. A conductor pattern is formed on the front surface. The conductor pattern includes a multi-mark interdigital transducer (IDT), with fingers of the IDT on the diaphragm.
    Type: Application
    Filed: July 29, 2021
    Publication date: August 4, 2022
    Inventors: Greg Dyer, Bryant Garcia, Julius Koskela
  • Publication number: 20220209740
    Abstract: Acoustic resonator devices and acoustic filter devices. An acoustic resonator includes a piezoelectric plate having front and back surfaces, a portion of the piezoelectric plate forming a diaphragm, and a conductor pattern on the front surface, the conductor pattern comprising an interdigital transducer (IDT), interleaved fingers of the IDT on the diaphragm. A ratio of a mark of the interleaved fingers to a pitch of the interleaved fingers is greater than or equal to 0.12 and less than or equal to 0.3. A thickness of the interleaved fingers is greater than or equal to 0.85 times a thickness of the piezoelectric plate and less than or equal to 2.5 times the thickness of the piezoelectric plate.
    Type: Application
    Filed: March 16, 2022
    Publication date: June 30, 2022
    Inventors: Bryant Garcia, Ventsislav Yantchev, Patrick Turner, Viktor Plesski, Julius Koskela, Soumya Yandrapalli, Neal Fenzi, Robert B. Hammond
  • Publication number: 20220149814
    Abstract: Acoustic resonators and filter devices. An acoustic resonator includes a piezoelectric plate having front and back surfaces, a portion of the piezoelectric plate forming a diaphragm, a conductor pattern on the front surface, the conductor pattern including an interdigital transducer (IDT), fingers of the IDT on the diaphragm, and a front-side dielectric layer on the front surface of the piezoelectric plate between the interleaved fingers. A resonant frequency is determined, in part, by a thickness of the front-side dielectric layer. A ratio of a mark of the interleaved fingers to a pitch of the interleaved fingers is greater than or equal to 0.12 and less than or equal to 0.3.
    Type: Application
    Filed: January 26, 2022
    Publication date: May 12, 2022
    Inventors: Bryant Garcia, Julius Koskela, Robert B. Hammond, Patrick Turner, Viktor Plesski, Ventsislav Yantchev, Soumya Yandrapalli
  • Publication number: 20220131525
    Abstract: Acoustic resonators and filter devices. An acoustic resonator includes a piezoelectric plate having front and back surfaces, a portion of the piezoelectric plate forming a diaphragm, and a conductor pattern on the front surface, the conductor pattern including a multi-mark interdigital transducer (IDT), fingers of the IDT on the diaphragm. A thickness between the front and back surfaces is greater than or equal to 200 nm and less than or equal to 1000 nm.
    Type: Application
    Filed: December 30, 2021
    Publication date: April 28, 2022
    Inventors: Greg Dyer, Bryant Garcia, Julius Koskela, Robert B. Hammond, Patrick Turner, Viktor Plesski, Ventsislav Yantchev, Soumya Yandrapalli
  • Publication number: 20220123720
    Abstract: Acoustic resonators and filter devices. An acoustic resonator includes a piezoelectric plate having front and back surfaces, a portion of the piezoelectric plate forming a diaphragm, and a conductor pattern on the front surface, the conductor pattern including an interdigital transducer (IDT), interleaved fingers of the IDT on the diaphragm. A ratio of a mark of the interleaved fingers to a pitch of the interleaved fingers is greater than or equal to 0.12 and less than or equal to 0.3. The pitch of the interleaved fingers is greater than or equal to 6 times a thickness of the piezoelectric plate and less than or equal to 12.5 times the thickness of the piezoelectric plate.
    Type: Application
    Filed: December 24, 2021
    Publication date: April 21, 2022
    Inventors: Bryant Garcia, Ventsislav Yantchev, Patrick Turner, Viktor Plesski, Julius Koskela, Soumya Yandrapalli, Neal Fenzi, Robert B. Hammond
  • Publication number: 20220123723
    Abstract: Acoustic resonators and filter devices. An acoustic resonator includes a piezoelectric plate having front and back surfaces, the back surface attached to a surface of a substrate, a portion of the piezoelectric plate forming a diaphragm spanning a cavity in the substrate, and a conductor pattern on the front surface, the conductor pattern including an interdigital transducer (IDT), interleaved fingers of the IDT on the diaphragm. A ratio of a mark of the interleaved fingers to a pitch of the interleaved fingers is greater than or equal to 0.12 and less than or equal to 0.3. A thickness between the front and back surfaces is greater than or equal to 200 nm and less than or equal to 1000 nm.
    Type: Application
    Filed: December 30, 2021
    Publication date: April 21, 2022
    Inventors: Bryant Garcia, Julius Koskela, Robert B. Hammond, Patrick Turner, Viktor Plesski, Ventsislav Yantchev, Soumya Yandrapalli
  • Publication number: 20220123722
    Abstract: Acoustic resonators and filter devices. An acoustic resonator includes a piezoelectric plate having front and back surfaces, a portion of the piezoelectric plate forming a diaphragm, and a conductor pattern on the front surface, the conductor pattern including a multi-mark interdigital transducer (IDT), with fingers of the IDT on the diaphragm. A thickness of the interleaved fingers is greater than or equal to 0.85 times a thickness of the piezoelectric plate and less than or equal to 2.5 times the thickness of the piezoelectric plate.
    Type: Application
    Filed: December 28, 2021
    Publication date: April 21, 2022
    Inventors: Greg Dyer, Bryant Garcia, Julius Koskela, Robert B. Hammond, Patrick Turner, Viktor Plesski, Ventsislav Yantchev, Neal Fenzi
  • Publication number: 20220116015
    Abstract: Acoustic resonator devices and acoustic filter devices. An acoustic resonator includes a piezoelectric plate having front and back surfaces, a portion of the piezoelectric plate forming a diaphragm, and a conductor pattern on the front surface, the conductor pattern comprising an interdigital transducer (IDT), interleaved fingers of the IDT on the diaphragm. A ratio of a mark of the interleaved fingers to a pitch of the interleaved fingers is greater than or equal to 0.12 and less than or equal to 0.3. A thickness of the interleaved fingers is greater than or equal to 0.85 times a thickness of the piezoelectric plate and less than or equal to 2.5 times the thickness of the piezoelectric plate.
    Type: Application
    Filed: December 23, 2021
    Publication date: April 14, 2022
    Inventors: Bryant Garcia, Ventsislav Yantchev, Patrick Turner, Viktor Plesski, Julius Koskela, Soumya Yandrapalli, Neal Fenzi, Robert B. Hammond
  • Patent number: 11296677
    Abstract: The present disclosure provides systems and methods for scalable and parallel computation of hierarchical cascading in finite element method (FEM) simulations of surface acoustic wave (SAW) devices. Different computing units of a cluster or cloud service may be assigned to independently model different core blocks or combinations of core blocks for iterative cascading to generate a model of the SAW devices. Similarly, frequency ranges may independently be assigned to computing units for modeling and analysis of devices, drastically speeding up computation.
    Type: Grant
    Filed: December 11, 2019
    Date of Patent: April 5, 2022
    Assignee: RESONANT, INC.
    Inventors: Balam Willemsen, Viktor Plesski, Julius Koskela
  • Publication number: 20220060167
    Abstract: Acoustic resonators, acoustic filter devices and methods of making the same. An acoustic resonator device includes a piezoelectric layer having front and back surfaces, a high acoustic velocity layer on the back surface, and an interdigital transducer (IDT) on the front surface. The high acoustic velocity layer has a higher acoustic velocity than an acoustic velocity of the piezoelectric layer.
    Type: Application
    Filed: August 20, 2021
    Publication date: February 24, 2022
    Inventors: Viktor Plesski, Julius Koskela, Ventsislav Yantchev, Patrick Turner, Neal Fenzi, Robert B. Hammond
  • Patent number: 11251775
    Abstract: Acoustic resonator devices, filter devices, and methods of fabrication are disclosed. A resonator device includes a single-crystal piezoelectric plate having a front surface and a back surface opposite the front surface, wherein the back surface is coupled to a surface of a substrate. A floating back-side conductor pattern is formed on a portion of the back surface. A front-side conductor pattern including two electrodes is formed on a portion of the front surface opposite the back-side conductor.
    Type: Grant
    Filed: December 17, 2020
    Date of Patent: February 15, 2022
    Assignee: Resonant Inc.
    Inventors: Viktor Plesski, Julius Koskela
  • Publication number: 20210399714
    Abstract: There is disclosed acoustic resonators and filter devices. An acoustic resonator includes a substrate having a surface and a single-crystal piezoelectric plate having front and back surfaces, the back surface attached to the surface of the substrate except for a portion of the piezoelectric plate forming a diaphragm that spans a cavity in the substrate. An interdigital transducer (IDT) is formed on the front surface of the single-crystal piezoelectric plate such that interleaved fingers of the IDT are disposed on the diaphragm. The piezoelectric plate and the IDT are configured such that a radio frequency signal applied to the IDT excites a primary shear acoustic mode in the diaphragm. The interleaved fingers comprise a first layer proximate the diaphragm, a second layer over the first layer, and a third layer over the second layer, wherein adjacent layers are different materials.
    Type: Application
    Filed: December 1, 2020
    Publication date: December 23, 2021
    Inventors: Julius Koskela, Bryant Garcia
  • Publication number: 20210399710
    Abstract: There is disclosed acoustic resonators and filter devices. An acoustic resonator device includes a piezoelectric plate, and an interdigital transducer (IDT) formed on a front surface of the piezoelectric plate. The IDT includes interleaved fingers. At least one of the interleaved fingers includes a first layer adjacent the piezoelectric plate and a second layer over the first layer, wherein a width of the first layer is constant, and wherein a width of the second layer varies along a length of the at least one interleaved finger.
    Type: Application
    Filed: February 10, 2021
    Publication date: December 23, 2021
    Inventors: Viktor Plesski, Julius Koskela
  • Publication number: 20210376814
    Abstract: Acoustic resonators and filter devices, and methods of making acoustic resonators and filter devices. An acoustic resonator includes a substrate having a surface and a single-crystal piezoelectric plate having front and back surfaces, the back surface attached to the surface of the substrate except for a portion of the plate forming a diaphragm that spans a cavity in the substrate. An interdigital transducer (IDT) is formed on the front surface with interleaved fingers of the IDT on the diaphragm. The plate and the IDT are configured such that a radio frequency signal applied to the IDT excites a primary shear acoustic mode in the diaphragm. The fingers include a first layer proximate the diaphragm, and a second layer over the first layer. The first and second layers are different metals. A transverse acoustic impedance of the second layer is higher than a transverse acoustic impedance of the first layer.
    Type: Application
    Filed: December 14, 2020
    Publication date: December 2, 2021
    Inventors: Julius Koskela, Bryant Garcia, Viktor Plesski
  • Patent number: 11182522
    Abstract: The present disclosure provides systems and methods for hierarchical cascading in finite element method (FEM) simulations of surface acoustic wave (SAW) devices, which offers drastically reduced memory consumption and simulation times. In some implementations, iterative hierarchical cascading may also be applied to three-dimensional simulations of SAW devices, which may otherwise be too complex for FEM simulations due to the high number of cross-sectional degrees-of-freedom involved.
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: November 23, 2021
    Assignee: RESONANT, INC.
    Inventors: Julius Koskela, Viktor Plesski
  • Publication number: 20210333166
    Abstract: There are disclosed pressure-sensitive acoustic resonators and remote pressure sensing systems and methods. A pressure-sensitive acoustic resonator includes a conductor pattern formed on a planar surface of a non-piezoelectric substrate, the conductor pattern including an interdigital conductor pattern (ICP); and a diaphragm, the diaphragm being a portion of a plate of single-crystal piezoelectric material, the diaphragm having a front surface exposed to an environment and a back surface facing, but not contacting, the ICP.
    Type: Application
    Filed: July 8, 2021
    Publication date: October 28, 2021
    Inventors: Viktor Plesski, Soumya Yandrapalli, Julius Koskela, Ventsislav Yantchev
  • Patent number: 11146232
    Abstract: Acoustic filters, resonators and methods are disclosed. An acoustic resonator device includes a substrate having a surface. A back surface of a single-crystal piezoelectric plate is attached to the surface of the substrate except for a portion of the piezoelectric plate forming a diaphragm that spans a cavity in the substrate. A conductor pattern is formed on the front surface of the piezoelectric plate, the conductor pattern including an interdigital transducer (IDTs), interleaved fingers of the IDT disposed on the diaphragm. A pitch of the interleaved fingers and a mark of the interleaved fingers are set in combination such that a resonance frequency of the acoustic resonator is equal to a predetermined target frequency.
    Type: Grant
    Filed: September 23, 2020
    Date of Patent: October 12, 2021
    Assignee: Resonant Inc.
    Inventors: Soumya Yandrapalli, Viktor Plesski, Julius Koskela, Ventsislav Yantchev, Patrick Turner
  • Patent number: 11143561
    Abstract: There are disclosed pressure-sensitive acoustic resonators and remote pressure sensing systems and methods. A pressure-sensitive acoustic resonator includes a conductor pattern formed on a planar surface of a dielectric substrate, the conductor pattern including an interdigital conductor pattern (ICP), and a diaphragm, the diaphragm being a portion of a plate of single-crystal piezoelectric material, the diaphragm having a front surface exposed to an environment and a back surface facing, but not contacting, the ICP.
    Type: Grant
    Filed: October 25, 2019
    Date of Patent: October 12, 2021
    Assignee: Resonant Inc.
    Inventors: Viktor Plesski, Soumya Yandrapalli, Julius Koskela, Ventsislav Yantchev
  • Publication number: 20210313953
    Abstract: Acoustic filters, resonators and methods are disclosed. An acoustic resonator includes a substrate and a piezoelectric plate includes a diaphragm that spans a cavity in the substrate. A conductor pattern includes an interdigital transducer (IDT) with interleaved parallel fingers on the diaphragm. A center-to-center spacing between two adjacent parallel fingers is greater than or equal to 2.5 times a thickness of the diaphragm and less than or equal to 15 times the diaphragm thickness.
    Type: Application
    Filed: June 17, 2021
    Publication date: October 7, 2021
    Inventors: Soumya Yandrapalli, Viktor Plesski, Julius Koskela, Ventsislav Yantchev, Patrick Turner
  • Publication number: 20210313952
    Abstract: Acoustic filters, resonators and methods are disclosed. An acoustic resonator includes a substrate and a piezoelectric plate including a diaphragm that spans a cavity in the substrate. A conductor pattern includes an interdigital transducer (IDT) with interleaved parallel fingers on the diaphragm. A ratio of a width of either of two adjacent parallel fingers and a center-to-center spacing between the two adjacent parallel fingers is greater than or equal to 0.2 and less than or equal to 0.3.
    Type: Application
    Filed: June 17, 2021
    Publication date: October 7, 2021
    Inventors: Soumya Yandrapalli, Viktor Plesski, Julius Koskela, Ventsislav Yantchev, Patrick Turner