Title:
COLLIMATING EXTRACTION GRID CONDUCTOR AND METHOD
Document Type and Number:
Japanese Patent JP3913282
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a collimating extraction grid conductor to reduce divergence of an electron beam, and a method for focusing an electron source.
SOLUTION: An electron source assists in focusing an electron beam emitted from the electron source by using new extraction grid conductors 20, 40 and 41. The extraction grid conductors 20, 40 and 41 have collimating conductors 29 and 31, and separate extraction grid parts 17, 21 and 22 of the extraction grid conductors from conductors strips 26, 24, 32 and 33. The conductor strips 26, 24, 32 and 33 electrically connect the extraction grid parts 17, 21 and 22 to an external voltage source. An emission electron is prevented from being attracted to the conductor strips 26, 24, 32 and 33 by an electric field generated by the parallelizing conductors 29 and 31, and an emission electron beam is maintained in an almost row shape.
Inventors:
James E. Jasky
Lawrence N. Dosky
Lawrence N. Dosky
Application Number:
JP32993495A
Publication Date:
May 09, 2007
Filing Date:
November 24, 1995
Export Citation:
Assignee:
MOTOROLA INCORPORATED
International Classes:
H01J1/30; H01J1/304; H01J3/02; H01J31/12; (IPC1-7): H01J1/30
Domestic Patent References:
| JP5266787A | ||||
| JP5152640A | ||||
| JP684478A |
Attorney, Agent or Firm:
Mamoru Kuwagaki