The low voltage phosphors should be efficiently excited with an electron beam value lower than 500V. Thus the properties of low voltage phosphors are directly affected by the surface states of phosphors. Recently, to improve the properties of these phosphors, much analysis has been carried out focused on the surfaces of phosphors using by FESEM, AES or XPS etc.. Nevertheless, the microstructure of phosphors around the surface has not been made clear due to the resolution limits of the above equipments and the difficulties of sample preparation. In this study, in order to analyze the microstructure of phosphors around the surface, we have prepared the thin sections of the (ZnxCdy)S phosphors by an ultramicrotome and carried out high resolution electron microscope(HREM) study on the thin sections.

To carry out ultramicrotomy, the particles of phophors were embedded with acrylic resin (methyl methacrylate: n-butyl methacrylate= 4:6, Benzoyl peroxide 1.5%) in a capsule.