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. 01, 1991
Filed:
Oct. 17, 1989
Applicant:
Inventors:
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313308 ; 313309 ; 313336 ;
Abstract
Structures and methods of manufacture for field emission cathodes having cathode tips of minute size, whereby a block formed of pairs of substrates each having a patterned thin layer of cathode material sandwiched therebetween is sliced into a plurality of sections, to obtain array substrates each having an array of exposed regions of cathode material. A metal layer for constituting electron extraction electrodes and corresponding extraction apertures is formed over these exposed regions and appropriately shaped, after first forming mask layer portions upon the exposed cathode material regions.