The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 17, 2006
Filed:
Dec. 06, 2003
Kurt Hoffmann, Taufkirchen, DE;
Kurt Hoffmann, Taufkirchen, DE;
Abstract
The present invention refers to a field emitter beam source () comprising at least one emitter (); at least one extracting electrode () to extract a beam current (I) from the emitter (); a current source () for providing a predetermined beam current (I); a first voltage source () for providing a first voltage (U) between the emitter () and the extracting electrode () to switch on the beam current (I); and a first switch (S) for disconnecting the first voltage source (). With such a field emitter beam source, the emitter voltage (U) necessary to emit a predetermined beam current (I) can be determined. This in turn enables the field emitter beam source () to generate beam current pulses with a fast rise time and a well defined beam current pulse charge Q.