Patents by Inventor Rensinus C. Strijbos

Rensinus C. Strijbos 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).

  • Bulk acoustic wave resonator
    Patent number: 8487719
    Abstract: A resonator comprises a bottom electrode layer (12), a top electrode layer (10) which defines a resonator body; and a piezoelectric layer (14) sandwiched between the top and bottom electrode layers. An external region (152) is provided around the outside of the periphery of the resonator body. The cutoff frequency of a first resonance mode of the external region (152) is matched to the cutoff frequency of a second, different, resonance mode of the resonator body. The invention provides a deliberate change (typically increase) in the cutoff frequency the resonance modes in the external region, so that one of the modes has a cutoff frequency close to the cutoff frequency of the fundamental mode of the resonator body.
    Type: Grant
    Filed: April 24, 2009
    Date of Patent: July 16, 2013
    Assignee: TriQuint Semiconductor, Inc.
    Inventors: Andreras B. M. Jansman, Rensinus C. Strijbos, Erik Spaan, Jan-Willem Lobeek
  • BULK ACOUSTIC WAVE RESONATOR
    Publication number: 20110037539
    Abstract: A resonator comprises a bottom electrode layer (12), a top electrode layer (10) which defines a resonator body; and a piezoelectric layer (14) sandwiched between the top and bottom electrode layers. An external region (152) is provided around the outside of the periphery of the resonator body. The cutoff frequency of a first resonance mode of the external region (152) is matched to the cutoff frequency of a second, different, resonance mode of the resonator body. The invention provides a deliberate change (typically increase) in the cutoff frequency the resonance modes in the external region, so that one of the modes has a cutoff frequency close to the cutoff frequency of the fundamental mode of the resonator body.
    Type: Application
    Filed: April 24, 2009
    Publication date: February 17, 2011
    Applicant: NXP B.V.
    Inventors: Andreras B. M. Jansman, Rensinus C. Strijbos, Erik Spaan, Jan-Willem Lobeek