Electron microscopy (EM) sample preparation and cryo-SEM products. The industry standard “Q” series of vacuum coaters are established in EM laboratories around the world and increasingly in a wide range of thin-film applications. Home to the prestigious Polaron and Emitech brands, we take great pride in also actively supporting many of our EM preparation instruments with other brand names including Emscope, Bio-Rad, Fisons Instruments and Thermo VG.