ALEXANDRIA, Va., March 19 -- United States Patent no. 12,255,612, issued on March 18, was assigned to Soitec (Bernin, France).
"Surface acoustic wave device on composite substrate" was invented by Sylvain Ballandras (Besancon, France) and Thierry LaRoche (Besancon, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "A surface acoustic wave device comprising a base substrate, a piezoelectric layer and an electrode layer in between the piezoelectric layer and the base substrate, a comb electrode formed on the piezoelectric layer comprising a plurality of electrode means with a pitch p, defined asp=A, with A being the wavelength of the standing acoustic wave generated by applying opposite potentials to the el...