Cold Field Emitters
Unlike thermionic and thermal field emitters, CFEs operate at room temperature. Field emission occurs when electrons are emitted in response to the application of a strong electric field.
To achieve this high field, single-crystal tungsten is etched to a microscopically sharp tip.
The APT Advantage in Cold Field Emission:
We grow and process our own single-crystal tungsten in-house.
Our etch processes can be tailored to customers’ requirements and are tightly controlled to guarantee quality and consistency.
We can provide CFEs with any emitter base/suppressor configuration including FEI/Philips, Denka, Hitachi, JEOL, and custom configurations.
CFEs are very high brightness sources and as such, excel in applications where high-current densities are required and extremely high-vacuum conditions can be achieved.
Note: CFEs are very high brightness sources and as such, excel in applications where high-current densities are required and extremely high-vacuum conditions can be achieved.
