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:
Sep. 10, 2002
Filed:
Oct. 25, 1999
Mool Chand Gupta, Yorktown, VA (US);
Ganapati Rao Myneni, Yorktown, VA (US);
Southeastern Universities Res. Assn., Newport News, VA (US);
Abstract
The present invention provides a “solid” diamond, i.e. greater than 5&mgr; thick, electron emitter that has been “machined” using non-contact techniques to a point having a radius of less than about 100&mgr;, preferably below about 10&mgr; and most preferably between about 3 angstroms and about 3&mgr;. The solid diamond electron emitters of the present invention can perform, even at these small radii, as multi-point emitters depending upon the radius and roughness of the pointed tip and can be used in arrays to obtain relatively large area field emitters for applications where such larger field emissions are necessary. Production of the solid diamond emitters of the present invention is preferably accomplished using non-contact electron or ion beam machining techniques. Residual gas analyzers (RGA) and field emitter extractor gauge analyzers (FERGA) that use the solid diamond emitters are also described.