Cathode structure for reduced emission and robust handling prope

Details Cathode structure for reduced emission and robust handling prope Cathode structure for reduced emission and robust handling prope

1998-05-18

2000-11-14

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

Electrode making

H01J 902

Patent

active

061462292

ABSTRACT:
A photocathode device for use in an image intensifier, fabricated with a photoemissive semiconductor wafer having an active cathode layer which includes a central region of a first predetermined height surrounded by a peripheral region of a second predetermined height. The first predetermined height of the central region is configured to be greater than the second predetermined height of the peripheral region in order to create a recessed contact structure which is less likely to have unwanted emission points. A layer of conductive material covers the peripheral region to provide an electrical contact to the photocathode device. A layer of insulating material covers the layer of conductive material in order to protect the contact layer from being damage during handling operations.

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