METHOD OF DRIVING THERMAL INDUCTION TYPE SOUND WAVE RADIATING ELEMENT

摘要

PROBLEM TO BE SOLVED: To provide a method of driving a thermal induction type sound wave radiating element in which a sound wave radiated from the thermal induction type sound wave radiating element contains sound wave components having the same frequency as a fundamental frequency of an alternative current of a current to be allowed to flow to the thermal induction type sound wave radiating element. SOLUTION: In the method of driving a thermal induction type sound wave radiating element in which a tungsten layer 3 and a pair of metallic electrodes 4 are formed on a porous silicon layer 2 formed on a silicon single crystal substrate 1, AC and DC currents are allowed to flow to the tungsten layer 3 via the metallic layer 4 so that both the currents are superimposed, thereby irradiating a sound wave having the sound wave components having the same frequency as the fundamental frequency of the AC current, so that the method of driving a thermal induction type sound wave radiating element is configured. COPYRIGHT: (C)2005,JPO&NCIPI