Patent ID: 8116509

Claim:
An electromagnetic ultrasonic transducer comprising a support, an elastic board disposed on the support, a magnetizer on the elastic board, and a magnet field generator for making the magnetizer vibrate, wherein the thickness of the magnetizer is of the order of microns, the magnetizer is an elastic coil which is configured as a photolithographic coil manufactured by use of semiconductor photolithography and chemical corrosion technology; the support is made of a non-magnetizable material; the magnet field generator is configured as a soft magnet wound by coils, and the coils are connected to a D.C. power supply; the shape of the soft magnet is concave, and the support is fixed at the concave in the middle of the soft magnet; the coils are wound around two protuberant parts at ends of the soft magnet; the photolithographic coil is connected to an A.C. power supply.