Title of Invention	FIELD EMISSION COLD CATHODE AND A METHOD OF MAKING THE SAME
Abstract	A field emission cold cathode (11) for use in vacuum tubes. A carbon velvet material (25) is comprised of high aspect ratio carbon fibers embedded perpendicular to a base material. The tips and/or the shafts of the carbon velvet material (25) are coated with a low work function cesiated salt. The base material of the carbon velvet material (25) is bonded to a cathode surface (27). The cold cathode (11) emits electrons when an electric field is applied, even at operating temperatures less than 900°C.

Title of Invention

FIELD EMISSION COLD CATHODE AND A METHOD OF MAKING THE SAME

Abstract

A field emission cold cathode (11) for use in vacuum tubes. A carbon velvet material (25) is comprised of high aspect ratio carbon fibers embedded perpendicular to a base material. The tips and/or the shafts of the carbon velvet material (25) are coated with a low work function cesiated salt. The base material of the carbon velvet material (25) is bonded to a cathode surface (27). The cold cathode (11) emits electrons when an electric field is applied, even at operating temperatures less than 900°C.

Full Text

Documents:

http://ipindiaonline.gov.in/documents/21-CHENP-2005/21-CHENP-2005%20CORRESPONDENCE%20OTHERS%2027-10-2009.pdf

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Patent Number

237749

Indian Patent Application Number

21/CHENP/2005

PG Journal Number

3/2010

Publication Date

15-Jan-2010

Grant Date

06-Jan-2010

Date of Filing

17-Jan-2005

Name of Patentee

UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE AIR FORCE

Applicant Address

377 ABW/JAN, 2251 Maxwell Street, SE, Kirtland AFB, NM 97117-5773

Inventors:

#	Inventor's Name	Inventor's Address
1	SHIFFLER, Donald, A., Jr	6012 Lola Drive, NE, Albuquerque, NM 87109

PCT International Classification Number

H01J 1/304

PCT International Application Number

PCT/US2002/021283

PCT International Filing date

2002-07-18

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA