Patent ID: 8710729
Filing Date: 2014-04-29
Classification: H01J

Abstract:
1. A field emission cathode device, comprising: a cathode substrate; a gate electrode located on the cathode substrate; a first dielectric layer located on the gate electrode and defining a first opening such a gate electrode exposed portion is exposed; a cathode electrode located on the first dielectric layer and defining a second opening in alignment with the first opening and a sixth opening about the second opening, wherein the sixth opening divides the cathode electrode into a first portion, a second portion and at least one connecting portion; and the second portion is spaced from the first portion and electrically connected to the first portion by the at least one connecting portion; and an electron emission layer located on the cathode electrode, wherein the second portion is located between the first dielectric layer and the electron emission layer, and the electron emission layer is located only on the second portion.