Patents by Inventor Mohamed Abd Allah

Mohamed Abd Allah 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).

  • Acoustic resonator including extended cavity
    Patent number: 10256788
    Abstract: A BAW resonator includes a nonlinear substrate defining a cavity, and an acoustic stack over the cavity, including a bottom electrode, a piezoelectric layer, and a top electrode, where an active region of the acoustic stack includes overlapping portions of the cavity, the bottom electrode, the piezoelectric layer and the top electrode. The BAW resonator further includes a connecting strip extending from a portion of the top electrode for providing electrical excitation of the acoustic stack, where an E-field generated in the BAW resonator begins at the top electrode and terminates at the bottom electrode in response to the electrical excitation. The cavity includes an inner portion in the active region and an extended portion extending from an outer perimeter of the active region underneath the connecting strip. A length of the extended portion are sufficient to substantially prevent portions of the E-field from passing through the substrate.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: April 9, 2019
    Assignee: Avago Technologies International Sales Pte. Limited
    Inventors: Siamak Fouladi Azarnaminy, David A. Feld, Qiang Zou, Andrew Barfknecht, Mohamed Abd Allah, Jing Wu, Zongliang Cao, Guiti Zolfagharkhani
  • ACOUSTIC RESONATOR INCLUDING EXTENDED CAVITY
    Publication number: 20180287584
    Abstract: A BAW resonator includes a nonlinear substrate defining a cavity, and an acoustic stack over the cavity, including a bottom electrode, a piezoelectric layer, and a top electrode, where an active region of the acoustic stack includes overlapping portions of the cavity, the bottom electrode, the piezoelectric layer and the top electrode. The BAW resonator further includes a connecting strip extending from a portion of the top electrode for providing electrical excitation of the acoustic stack, where an E-field generated in the BAW resonator begins at the top electrode and terminates at the bottom electrode in response to the electrical excitation. The cavity includes an inner portion in the active region and an extended portion extending from an outer perimeter of the active region underneath the connecting strip. A length of the extended portion are sufficient to substantially prevent portions of the E-field from passing through the substrate.
    Type: Application
    Filed: March 31, 2017
    Publication date: October 4, 2018
    Inventors: Siamak Fouladi Azarnaminy, David A. Feld, Qiang Zou, Andrew Barfknecht, Mohamed Abd Allah, Jing Wu, Zongliang Cao, Guiti Zolfagharkhani
  • Bulk acoustic wave device with a semiconductor layer
    Patent number: 7977850
    Abstract: A bulk acoustic wave device includes a first electrode, a second electrode, a piezoelectric layer arranged between the first and second electrodes and a semiconductor layer arranged between the first and second electrodes. The semiconductor layer is electrically isolated from the first electrode.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: July 12, 2011
    Assignee: Avago Technologies Wireless IP (Singapore) Pte. Ltd.
    Inventors: Mohamed Abd Allah, Werner Weber, Robert Thalhammer, Jyrki Kaitila
  • Bulk Acoustic Wave Device with a Semiconductor Layer
    Publication number: 20090218912
    Abstract: A bulk acoustic wave device includes a first electrode, a second electrode, a piezoelectric layer arranged between the first and second electrodes and a semiconductor layer arranged between the first and second electrodes. The semiconductor layer is electrically isolated from the first electrode.
    Type: Application
    Filed: February 29, 2008
    Publication date: September 3, 2009
    Inventors: Mohamed Abd Allah, Werner Weber, Robert Thalhammer, Jyrki Kaitila