Patents by Inventor Charles Witkowski

Charles Witkowski 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).

  • BAW structure having multiple BAW transducers over a common reflector, which has reflector layers of varying thicknesses
    Patent number: 10601398
    Abstract: A BAW device includes a substrate, a first reflector, and at least two BAW transducers. The first reflector resides over the substrate and has a plurality of reflector layers. A first BAW transducer resides over a first section of the first reflector, has a first series resonance frequency, and has a first piezoelectric layer of a first thickness between a first top electrode and a first bottom electrode. The second BAW transducer resides over a second section of the first reflector, has a second series resonance frequency that is different than the first series resonance frequency, and has a second piezoelectric layer of a second thickness, which is different than the first thickness, between a second top electrode and a second bottom electrode.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: March 24, 2020
    Assignee: Qorvo US, Inc.
    Inventors: Dana Jay Sturzebecher, Larry Charles Witkowski, Arthur Donald Ballato, Andrew Arthur Ketterson
  • BAW STRUCTURE HAVING MULTIPLE BAW TRANSDUCERS OVER A COMMON REFLECTOR, WHICH HAS REFLECTOR LAYERS OF VARYING THICKNESSES
    Publication number: 20190319602
    Abstract: A BAW device includes a substrate, a first reflector, and at least two BAW transducers. The first reflector resides over the substrate and has a plurality of reflector layers. A first BAW transducer resides over a first section of the first reflector, has a first series resonance frequency, and has a first piezoelectric layer of a first thickness between a first top electrode and a first bottom electrode. The second BAW transducer resides over a second section of the first reflector, has a second series resonance frequency that is different than the first series resonance frequency, and has a second piezoelectric layer of a second thickness, which is different than the first thickness, between a second top electrode and a second bottom electrode.
    Type: Application
    Filed: April 13, 2018
    Publication date: October 17, 2019
    Inventors: Dana Jay Sturzebecher, Larry Charles Witkowski, Arthur Donald Ballato, Andrew Arthur Ketterson
  • Improved Methods and Devices for Concentration and Fractionation of Analytes for Chemical Analysis including Matrix-Assisted Laser Desorption/Ionization (MALDI) Mass Spectrometry (MS)
    Publication number: 20060219558
    Abstract: A device for pre-concentration and purification of analytes from biological samples, such as human serum, to be analyzed by Matrix-Assisted Laser Desorption Ionization Mass Spectrometry (MALDI MS) and methods of use thereof are provided.
    Type: Application
    Filed: April 5, 2006
    Publication date: October 5, 2006
    Inventors: Dean Hafeman, James Harkins, Jeremy Norris, Sheila Baker, Donald Loveday, Daniel Kuban, Richard Caprioli, Charles Witkowski
  • Methods and devices for concentration and purification of analytes for chemical analysis including matrix-assisted laser desorption/ionization (MALDI) mass spectrometry (MS)
    Publication number: 20050116161
    Abstract: Analytical methods and devices are disclosed for separating low abundance analytes by electrophoretically driving the analytes through a sieving matrix to first remove high molecular weight species. Subsequently the remaining low abundance analytes are electrophoretically focused onto a capture membrane where the analytes become bound within a small capture site. After this step the capture membrane may be allowed to dry and then attached to a conductive MALDI sample plate.
    Type: Application
    Filed: October 12, 2004
    Publication date: June 2, 2005
    Applicant: Protein Discovery, Inc.
    Inventors: Dean Hafeman, Kilian Dill, James Harkins, Richard Caprioli, Jeremy Norris, Nathan Lewis, Daniel Kuban, Charles Witkowski