YPS Schottky thermal field emission (TFE) ZrO/W(100) sources are versatile, fitting various electron beam instruments such as SEM, TEM, Auger, and CD-SEM. These high-quality FE sources serve as a cost-effective alternative to traditional FEI and Denka-style sources.
The YPS source employs a thermal field emitter (TFE) cathode with zirconium oxide on a <100> oriented single crystal tungsten wire, featuring a highly precise tip mounted on a hairpin filament to maintain a temperature of around 1800K.
Electrons are emitted through thermal excitation and an electrical field generated by the potential difference between the tip and an extractor electrode, facilitated by its placement within a cylindrical suppressor electrode.
