Field emission device with focusing control electrode and...

Details Field emission device with focusing control electrode and... Field emission device with focusing control electrode and...

2005-02-17

2008-03-25

Williams, Joseph L. (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

Vacuum-type tube

C313S310000, C313S309000

Reexamination Certificate

active

07348722

ABSTRACT:
A field emission device having a focusing control electrode, and a field emission display (FED) including the same. The field emission device includes a substrate, a cathode electrode formed on the substrate, a focusing control insulating layer formed on the cathode electrode, and having a first cavity that exposes a portion of the cathode electrode, an electron emission source disposed on the cathode electrode that is exposed by the first cavity, a focusing control electrode formed on the focusing control insulating layer and including a focusing control hole aligned with the first cavity, the focusing control electrode controlling the focus of an electron beam emitted from the electron emission source upon applying to the focusing control electrode a voltage that is lower than the potential of the cathode electrode, a gate insulating layer formed on the focusing control electrode, and having a second cavity aligned with the first cavity, and a gate electrode formed on the gate insulating layer, and having a gate hole aligned with the second cavity.

REFERENCES:
patent: 5070282 (1991-12-01), Epsztein
patent: 6624589 (2003-09-01), Kitamura et al.
patent: 9-63467 (1997-03-01), None
patent: 10106429 (1998-04-01), None

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