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:
May. 19, 2015
Filed:
Oct. 30, 2012
Applicants:
Yong-chul Kim, Seoul, KR;
In-taek Han, Seoul, KR;
Ho-suk Kang, Seoul, KR;
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01B 1/06 (2006.01); H01B 1/24 (2006.01); H01J 31/12 (2006.01); H01J 29/04 (2006.01);
U.S. Cl.
CPC ...
H01J 31/127 (2013.01); H01J 29/04 (2013.01); H01J 2329/0428 (2013.01); H01J 2329/0431 (2013.01); H01J 2329/0444 (2013.01); Y10S 977/742 (2013.01);
Abstract
An electron emission source includes nano-sized acicular materials and a cracked portion formed in at least one portion of the electron emission source. The acicular materials are exposed between inner walls of the cracked portion. A method for preparing the electron emission source, a field emission device including the electron emission source, and a composition for forming the electron emission source are also provided in the present invention.