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. 27, 1998
Filed:
Oct. 20, 1995
Applicant:
Inventors:
Joel Danroc, Granable, FR;
Danh Tran Van, Crolles, FR;
Assignee:
Commissariat a l'Energie Atomique, Paris, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313309 ; 313336 ; 313351 ; 313495 ;
Abstract
A field effect electron source includes a grid electrode formed over an insulating layer that covers a cathode electrode formed on an insulating substrate. Holes are provided in the grid electrode-insulating layer structure, the holes extending to the cathode electrode formed on the insulating substrate. Electron emitting microheaps are formed within the holes above the exposed portions of the cathode electrode on the substrate. These microheaps each include at least a macropile of carbon diamond or diamond like carbon powder grains surrounded by the sidewalls of the hole.