Nanotube Cathode Boosts Current
These density levels were achieved with currents sufficient to address many applications where high electron current densities are required, such as cathode ray tube (CRT) TVs, high power microwave devices, e-beam lithography and fine-focus x-ray tubes, says the company.
The performance achieved at ANI now brings the performance of gated carbon nanotube cathodes to levels achieved with standard thermal (hot) cathodes but without the power burden and slow response typical of a thermal cathode, the company claims.
These high current density electron sources can be created one at a time or in large arrays with independent addressability. The key features are that these sources can achieve both high current and high current densities in a structure that allows low voltage switching of the beam on and off. Low voltage switching is critical to applications such as CRTs because it leads to fast response times and low power operation.
"The new high current and high density electron emitter based on carbon nanotubes will revitalise the current $40bn CRT industry due to the fact that the carbon nanotube cold electron emitter will shorten the neck (depth) of the CRT and also be more energy efficient (heater free instant emission)," claims Dr Zvi Yaniv, president and CEO of ANI.
"With additional electron optics CRT makers will be able to use the new CNT electron emitter to achieve more directional and precise electron beams. Furthermore, due to these properties the electron beams will have very little distortion and will allow wider deflection angles suitable for large area high definition televisions (HDTV) based on CRTs."
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