Apparatus for the deposition of low frequency cadmium sulphide transducers

Abstract

A vapour deposition method for the production of thick cadmium sulphide transducers with resonant frequencies as low as 20 MHz is described. The transducer films are insulating and polycrystalline with the crystallites' c axes oriented normal to the substrate. They were grown at about 1 μm min⁻¹ by co-deposition of cadmium and sulphur inside an inverted dish.