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Uniform High-Current Cathodes Using Massive Arrays of Si Field Emitters Individually Controlled by Vertical Si Ungated FETs—Part 1: Device Design and Simulation

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4 Author(s)
Velasquez-Garcia, L.F. ; Microsyst. Technol. Labs. (MTL), Massachusetts Inst. of Technol., Cambridge, MA, USA ; Guerrera, S.A. ; Ying Niu ; Akinwande, A.I.

In this paper, we report the design and simulation of electron sources composed of arrays of Si field emitters (FEs) that are individually ballasted by a current source. Each FE is fabricated on top of a vertical ungated field-effect transistor (FET), a two-terminal device based on a very-high-aspect-ratio Si column. The ungated FET takes advantage of the velocity saturation of electrons in silicon, the high aspect ratio of the ungated FET, and the doping concentration of the semiconductor to achieve current-source-like behavior. The proposed technology can be used to implement cathodes capable of reliable uniform and high current emission.

Published in:

Electron Devices, IEEE Transactions on  (Volume:58 ,  Issue: 6 )

Date of Publication:

June 2011

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