Patent ID: 8033881
Filing Date: 2011-10-11
Classification: H01J

Abstract:
1. A method of manufacturing a field emission device, the method comprising the steps of: sequentially forming cathodes and a light blocking layer on a substrate, and patterning the light blocking layer to form blocking layer holes exposing the cathodes; sequentially forming an insulating layer and a gate material layer on the light blocking layer, and patterning the gate material layer to form gate electrodes in which gate electrode holes exposing portions of the insulating layer disposed over the blocking layer holes are formed; forming a conductive transparent material layer on top surfaces of the gate electrodes and portions of the insulating layer exposed by the gate electrode holes; coating a photoresist on the transparent material layer, and exposing and developing the photoresist so as to form resist holes that are substantially the same in diameter and shape to the blocking layer holes, and to expose portions of the transparent material layer disposed over the blocking layer holes; etching the portions of the transparent material layer exposed by the resist holes to form transparent electrodes in which transparent electrode holes exposing portions of the insulating layer are formed; isotropically etching the portions of the insulating layer exposed through the transparent electrode holes until the blocking layer holes are exposed to form insulating layer holes; etching the transparent electrodes exposed by the insulating layer holes to form gate holes, and removing the photoresist; and forming emitters on the cathodes exposed by the blocking layer holes, wherein the conductive transparent material layer is formed of a metallic film having etch selectivity with respect to the cathodes, and wherein the resist holes are formed by exposing and developing the photoresist with a backside exposure using the light blocking layer as a photomask.