The YPS-184 Schottky Module is a drop-in alternative for the FEI SEM unit. The suppressor aperture has a diameter of 400µm and the emitter protrudes 250µm from the suppressor electrode. The YPS-184 module is also compatible with Tescan FESEMs.

The 184 module is also used by several electron optical manufacturers in their instruments (CD-SEM, EPMA, etc.), please contact us for your specific requirements.

Technical Specifications

  • Operating Temperature: 1800k 
  • Operating Pressure (recommended): < 5 × 10⁻⁹ mbar
  • Filament Current: 2.2 – 2.5 A
  • Suppressor protrusion: 250µm
  • Standard Emitter Radius: 0.4 – 0.6 µm*

    *We offer a variety of radii to accommodate different requirements. For customised emitter radius or instrument type needs, please contact us.

Key Features

  • YPS Schottky TFEs exhibit excellent stability over a wide range of acceleration voltages and long operating times.
  • These products are suitable for users proficient in replacing TFEs and familiar with changing, loading, and aligning them in a clean environment.
  • YPS TFEs have a long life, are competitively priced, and come with a 12-month warranty.
  • Each YPS TFE includes an extensive and unique datasheet detailing the supplied emitter characteristics: radii in µm, current vs voltage, and filament current vs emitter temperature graph.