Patents by Inventor Daisuke TAMASAKI

Daisuke TAMASAKI 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).

  • Surface acoustic wave device
    Patent number: 9159900
    Abstract: A surface acoustic wave device includes a piezoelectric substrate, an IDT electrode provided on the piezoelectric substrate, a first dielectric layer, and a second dielectric layer. The first dielectric layer is provided on the piezoelectric substrate and made of silicon oxide. The second dielectric layer is provided on the first dielectric layer and has an acoustic velocity greater than that of the first dielectric layer. A third dielectric layer is provided between the first dielectric layer and the piezoelectric substrate, and arranged to cover a surface of the piezoelectric substrate and an upper surface and side surfaces of the IDT electrode.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: October 13, 2015
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Daisuke Tamasaki
  • Surface acoustic wave filter device
    Patent number: 9124243
    Abstract: A surface acoustic wave filter device uses a Rayleigh wave as a main mode, and includes a ladder type surface acoustic wave filter unit. A thickness of a dielectric layer in a surface acoustic wave resonator configuring a series arm resonator is different from thickness of a dielectric layer in a surface acoustic wave resonator configuring a parallel arm resonator. A propagation orientation of a surface acoustic wave in the surface acoustic wave resonator configuring the series arm resonator is different from a propagation orientation of a surface acoustic wave in the surface acoustic wave resonator configuring the parallel arm resonator.
    Type: Grant
    Filed: July 17, 2013
    Date of Patent: September 1, 2015
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Daisuke Tamasaki, Kenichi Uesaka
  • SURFACE ACOUSTIC WAVE FILTER DEVICE
    Publication number: 20130300519
    Abstract: A surface acoustic wave filter device uses a Rayleigh wave as a main mode, and includes a ladder type surface acoustic wave filter unit. A thickness of a dielectric layer in a surface acoustic wave resonator configuring a series arm resonator is different from thickness of a dielectric layer in a surface acoustic wave resonator configuring a parallel arm resonator. A propagation orientation of a surface acoustic wave in the surface acoustic wave resonator configuring the series arm resonator is different from a propagation orientation of a surface acoustic wave in the surface acoustic wave resonator configuring the parallel arm resonator.
    Type: Application
    Filed: July 17, 2013
    Publication date: November 14, 2013
    Inventors: Daisuke TAMASAKI, Kenichi UESAKA
  • SURFACE ACOUSTIC WAVE DEVICE
    Publication number: 20130285504
    Abstract: A surface acoustic wave device includes a piezoelectric substrate, an IDT electrode provided on the piezoelectric substrate, a first dielectric layer, and a second dielectric layer. The first dielectric layer is provided on the piezoelectric substrate and made of silicon oxide. The second dielectric layer is provided on the first dielectric layer and has an acoustic velocity greater than that of the first dielectric layer. A third dielectric layer is provided between the first dielectric layer and the piezoelectric substrate, and arranged to cover a surface of the piezoelectric substrate and an upper surface and side surfaces of the IDT electrode.
    Type: Application
    Filed: June 28, 2013
    Publication date: October 31, 2013
    Inventor: Daisuke TAMASAKI