ALEXANDRIA, Va., April 15 -- United States Patent no. 12,603,629, issued on April 14, was assigned to Soitec (Bernin, France).
"Composite structure and associated production method" was invented by Pascal Guenard (Froges, France), Ionut Radu (Crolles, France), Didier Landru (Le Champ-pres-Froges, France) and Eric Desbonnets (Lumbin, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "A composite structure for an acoustic wave device comprising a heterostructure includes: a useful layer of piezoelectric material, having a first face and a second face, the first face being arranged at a first bonding interface on a support substrate having a coefficient of thermal expansion less than that of the useful layer...