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:
Nov. 04, 2008
Filed:
Jul. 03, 2007
Natalya F. Naumenko, Moscow, RU;
Benjamin P. Abbott, Longwood, FL (US);
Natalya F. Naumenko, Moscow, RU;
Benjamin P. Abbott, Longwood, FL (US);
TriQuint, Inc., Orlando, FL (US);
Abstract
A SAW device includes a LiNbOsingle crystal piezoelectric substrate having an orientation defined by Euler angles (λ,μ,θ), with angle λ ranging from −5° to +5°, angle μ ranging from about −74° to about −65°, and angle θ ranging from −5° to +5°. Electrode patterns on a surface of the substrate form element resonators having a metallization ratio ranging from about 0.3 to about 0.8 and electrode thicknesses ranging from about 12% to about 17.5% of an acoustic wavelength of a strongly coupled non-leaky surface acoustic wave, excited on the surface of the substrate, if Al is used as electrode material, and in a range from about 6% to about 10% of an acoustic wavelength, if Cu is used as electrode material. Such orientations simultaneously combined with an optimized electromechanical coupling of spurious surface acoustic mode provide for improved performance in RF applications with a widened passband.