Patent ID: 7446469

Claim:
A flat lamp device, comprising: a pair of lower and upper glass plates arranged to face each other in parallel; a plurality of spacers interposed between the lower and upper glass plates so as to keep a mutual distance therebetween; a cathode electrode formed in the form of a single layer over the entire area of an upper surface of the lower glass plate; an insulation film formed on an upper surface of the cathode electrode; a plurality of semiconductor films independently patterned on the insulation film and spaced apart from each other at predetermined intervals; a catalyst metal layer laminated on the semiconductor films; a buffer metal layer interposed between the catalyst metal layer and the semiconductor films to improve adhesive force of the catalyst metal layer; a plurality of carbon nano-tubes formed on the catalyst metal layer; a grid electrode installed above the carbon nano-tubes between the lower and upper glass plates so as to guide electron emission from the carbon nano-tubes, the grid electrode having a mesh shape with an opening through which the emitted electrons pass; an anode electrode formed on a lower surface of the upper glass plate so as to accelerate the electrons emitted from the carbon nano-tubes; and a fluorescent layer formed on a lower surface of the anode electrode so that the accelerated electrons are collided thereto to emit light.