Patent ID: 8172634
Filing Date: 2012-05-08
Classification: H01J

Abstract:
1. A manufacturing method of a field emission cathode, comprising: forming, on a substrate in this order, an insulating layer, a gate electrode layer, and a sacrificial layer made of a thermosetting resin which exhibits Vickers hardness in the range of Hv 95 to 140 by heating; curing the sacrificial layer by maintaining the sacrificial layer at a temperature in the range of 180 to 210° C. for a predetermined time; forming an opening section in the sacrificial layer and the gate electrode layer by irradiating with a focused ion beam; forming a hole section by etching the insulating layer by using the sacrificial layer and the gate electrode layer as a mask; forming an emitter electrode on the substrate in the hole section by vapor-depositing an emitter material from vertically above the substrate; and removing the emitter material together with the sacrificial layer on the gate electrode layer.