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:
Jul. 03, 2001
Filed:
Jul. 19, 1999
Applicant:
Inventors:
Rich Gorski, Arlington Heights, IL (US);
Keith D. Jamison, Austin, TX (US);
Assignee:
Extreme Devices, Inc., Austin, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 1/30 ; H01J 1/924 ;
U.S. Cl.
CPC ...
H01J 1/30 ; H01J 1/924 ;
Abstract
A source of a focused electron beam is provided for use in a cathode ray tube (CRT) or vacuum microelectronic device. A carbon-based field emission cathode, extraction gate and focus lens are formed as an integrated structure using fabrication techniques that are used to form integrated circuits. An external focus lens is used to confine the beamlets from a large number of carbon-based surfaces. A convergence cup accelerates the beam toward a drift space and finally to a screen on a CRT or other device. The source may be much more compact than present CRT electron optics apparatus.