Electron emission element

Details Electron emission element Electron emission element

2006-04-11

2006-04-11

Patel, Nimeshkumar D. (Department: 2879)

Electric lamp and discharge devices

Electrode and shield structures

Cathodes containing and/or coated with electron emissive...

C313S336000, C313S351000, C313S357000

Reexamination Certificate

active

07026750

ABSTRACT:
An electron emission element of the present invention comprises a substrate, and a protrusion protruding from the substrate and including boron-doped diamond. The protrusion comprises a columnar body. And a tip portion of the protrusion comprises an acicular body sticking out therefrom. The distance r [cm] between a center axis and a side face in the columnar body and the boron concentration Nb [cm−3] in the diamond satisfy the relationship represented by the following formula (1):r>104Nb.(1)

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patent: P2001-266736 (2001-09-01), None
patent: P2002-75171 (2002-03-01), None

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