Effects of space charge on the current-voltage characteristics of field emitter arrays
- Naval Research Laboratory, Washington, District of Columbia. 20375 (United States)
Field emitter arrays are microfabricated very high electron current density sources. For rf amplifier applications, typical current densities are typically on the order of 100Amps/cm{sup 2}. Unlike thermionic emitters, the current densities at the emission sites on field emitters can approach 10{sup 8}Amps/cm{sup 2} at high fields. Consequently, the high current from the array can affect the I(V) characterization of the emitters. In this manuscript, we use a simple model of a field emitter to calculate the one dimensional space charge effects on the current versus gate voltage characteristics. Two effects are treated: charge between the gate and anode, and charge within the FEA unit cell, which gives rise to a new space charge component. It is shown that space charge effects can taint the Fowler Nordheim parametrization of field emitters and consequently affect the estimates of their transconductance. {copyright} {ital 1997 American Institute of Physics.}
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 560599
- Report Number(s):
- CONF-9609256--
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 391; ISSN 0094-243X; ISSN APCPCS
- Country of Publication:
- United States
- Language:
- English
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