Abstract: A SAW (Surface Acoustic Wave) magnetic sensor includes: a piezoelectric thin film; a seed layer; an interdigital transducer arranged respectively on each side of the piezoelectric thin film, the interdigital transducer comprising an interdigital electrode made from magnetic materials, and reflector grids located at both ends of the interdigital electrode; an underlying substrate arranged at the seed layer opposite to the piezoelectric thin film. A manufacturing method for the sensor is also disclosed.

Abstract: A method for preparing an ultrasonic material, including: 1) mixing methyl ethyl ketone with ethyl alcohol to prepare an azeotropic mixture; uniformly mixing carbon nanotube powders with a dispersant in the azeotropic mixture to yield a dispersoid; drying the dispersoid to yield dry carbon nanotube powders; 2) mixing the dry carbon nanotube powders in 1) with a light-cured resin to form a sizing mixture; 3) evenly distributing the sizing mixture in 2) over a plane of a mask image projection based stereo lithography apparatus to form a sizing mixture layer; 4) switching a design model of focused light-induced ultrasonic material to a two-dimensional image; projecting the two-dimensional image on a surface of the sizing mixture layer in 3); 5) exposing the sizing mixture layer in 3) under visible light and solidifying the sizing mixture layer; and 6) repeating 3)-5) to complete printing of the ultrasonic material.

Abstract: A SAW (Surface Acoustic Wave) magnetic sensor includes: a piezoelectric thin film; a seed layer; an interdigital transducer arranged respectively on each side of the piezoelectric thin film, the interdigital transducer comprising an interdigital electrode made from magnetic materials, and reflector grids located at both ends of the interdigital electrode; an underlying substrate arranged at the seed layer opposite to the piezoelectric thin film. A manufacturing method for the sensor is also disclosed.