Functionalized object with integrated mechanical wave sensor and associated production method

A method of producing a functionalized object, the method comprising the following steps:

• a) supplying a mechanical wave sensor comprising:
• a sensitive cell having a thickness less than or equal to 50 microns, and comprising an active layer of monocrystalline or polycrystalline piezoelectric material and two electrodes in contact with the active layer and accessible at a first surface of the sensitive cell;
• and
• a support layer having a front surface and a rear surface, its front surface being secured to a second surface of the sensitive cell;
• then
• b) forming an object in a solid material, by molding, by injection or by three-dimensional printing;
• c) securing the mechanical wave sensor on the object, during step b) by positioning the mechanical wave sensor such that the rear surface of the support layer is at least in contact with or integrated into the solid material forming the object and such that the electrodes remain accessible when the object is formed;
• then
• d) depositing two electrically conductive strips on the first surface of the sensitive cell and on a surface of the object, each strip connecting an electrode to an electrical contact pad arranged on the surface.