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. 04, 2000
Filed:
Feb. 19, 1999
Peter Bachmann, Wurselen, DE;
Detlef Wiechert, Aachen, DE;
Klaus Rademacher, Kall-Benenberg, DE;
Howard Wilson, Aachen, DE;
U.S. Philips Corporation, New York, NY (US);
Abstract
In an electron-emitting component with a cold cathode comprising a substrate and a cover layer with a diamond-containing material consisting of nano-crystalline diamond having a Raman spectrum with three lines, i.e. at K=1334.+-.4 cm.sup.-1 with a half-width value of 12.+-.6 cm.sup.-1, at K=1140.+-.20 cm.sup.-1 and at K=1470.+-.20 cm.sup.-1, the cold cathode exhibits a low extraction field strength, a stable emission at pressures below 10.sup.-4 mbar, a steep current-voltage characteristic and stable emission currents in excess of 1 microampere/mm.sup.2. The electron emission of the component demonstrates a long-time stability, and a constant intensity of the electron beam across its cross-section.