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:
Jun. 10, 2003
Filed:
Jan. 05, 2001
Alexandr Alexandrovich Blyablin, 117607 Moscow, RU;
Anton Valerievich Kandidov, 125414 Moscow, RU;
Mikhail Arkadievich Timofeev, 127484 Moscow, RU;
Boris Vadimovich Seleznev, 127484 Moscow, RU;
Andrei Alexandrovich Pilevsky, 117139 Moscow, RU;
Alexandr Tursunovich Rakhimov, 119121 Moscow, RU;
Nikolai Vladislavovich Suetin, 144005 Elektrostal, RU;
Vladimir Anatolievich Samorodov, 143430 Moskovskaya obl., RU;
Other;
Abstract
The present invention may be used in the production of highly efficient films for electron field emitters. The cold-emission cathode of the present invention comprises a substrate having a carbon film with an irregular structure applied thereon. This structure comprises carbon micro- and nano-ridges and/or micro- and nano-threads which are perpendicular to the surface of the substrate, which have a typical size of between 0.005 and 1 micron as well as a distribution density of between 0.1 and 100 &mgr;m , and which are coated with a diamond nano-film whose thickness represents a fraction of a micron. The method for producing the cathode involves sequentially depositing two carbon films. A carbon film with nano-barbs is first deposited on a substrate arranged on an anode by igniting a direct-current discharge at a density of between 0.15 and 0.5 A. This deposition is carried out in a mixture containing hydrogen and a carbon-containing additive, under a global pressure of between 50 and 300 torrs, using vapors of ethylic alcohol at a 5 to 15% concentration or vapors of methane at a 6 to 30% concentration, and at a temperature on the substrate of between 600 and 1100° C. A diamond nano-film is then deposited on the graphite film thus grown.