Diamond: a material for acoustic devices

Diamond has been foreseen to replace silicon for high power, high frequency electronic applications or for devices that operates in harsh environments. However, diamond electronic devices are still in the laboratory stage due to the lack of large substrates and the complexity of diamond doping. On another hand, surface acoustic wave filters based on diamond are commercially available. Diamond is especially suited for acoustic applications because of its exceptional mechanical properties. The other properties of diamond such as bio-inertness and chemical stability certainly make of diamond a key material for the next generation of acoustic sensors. In this article, we try to detail the interest of diamond films in composite acoustic applications and review the different type of acoustic devices/sensor.