The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 20, 2013
Filed:
Dec. 04, 2007
Edward Martin Godshalk, Newberg, OR (US);
Rick D. Lutz, Portland, OR (US);
Masud Hannan, Portland, OR (US);
Ralph N. Wall, Beaverton, OR (US);
Uppili Sridhar, Plano, TX (US);
Edward Martin Godshalk, Newberg, OR (US);
Rick D. Lutz, Portland, OR (US);
Masud Hannan, Portland, OR (US);
Ralph N. Wall, Beaverton, OR (US);
Uppili Sridhar, Plano, TX (US);
Triquint Semiconductor, Inc., Hillsboro, OR (US);
Abstract
Methods of reducing phase and amplitude ripples in a BAW resonator frequency response by providing a substrate, fabricating a Bragg mirror having alternate layers of a high acoustic material and a low acoustic material on a first surface of the substrate, fabricating a BAW on the Bragg mirror, and coating a second side of the substrate opposite the first side with a lossy material having an acoustic impedance in the range of 0.01× to 1.0× the acoustic impedance of the layers of high impedance material, the second surface of the substrate being a polished surface. Various embodiments are disclosed.