Field emission device apparatus employing an integrally formed capacitance and a switch serially connected between a conductive element and a current source to provide substantially continuous emitted electron current during selected charging periods and non-charging periods....http://www.google.fr/patents/US5313140?utm_source=gb-gplus-shareBrevet US5313140 - Field emission device with integral charge storage element and method for operation
Field emission device with integral charge storage element and method for ...
