Protection of electron-emissive elements prior to removing exces

Details Protection of electron-emissive elements prior to removing exces Protection of electron-emissive elements prior to removing exces

1997-10-31

2000-01-04

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

H01J 902

Patent

active

060103833

ABSTRACT:
In a partially finished electron-emitting device having electron-emissive elements (56A) formed at least partially with electrically non-insulating emitter material, electron-emissive element contamination that could result from passage of contaminant material through an excess layer (56B) of the emitter material is inhibited by forming a protective layer (58 or 70) over the excess emitter-material layer before performing additional processing operations on the electron-emitting device. Subsequent to these processing operations, material of the excess and protective layers overlying the electron-emissive elements is removed to expose the electron-emissive elements.

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