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AssigneesKabushiki Kaisha Toshiba, Fuji Pigment Co., Ltd.
InventorsTakeo Ito, Hidemi Matsuda, Masaaki Inamura, Hajime Tanaka, Kazuo Sakai
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An electron source device includes a porous layer (for example, porous alumina layer) which is composed of an insulator and has many microscopic holes provided in a direction perpendicular to a main surface, and first and second conductor layers placed on both sides of the porous layer, and is characterized in that the current density I/S is 1 μA/cm2 or higher when a direct-current voltage is applied between the second conductor layer and the fist conductor layer while using the second conductor layer as an anode. In this case, S represents the overlapping area of the first conductor layer, the second conductor layer and the porous layer. Consequently, an electron source device having a high electron emission ability and a long life even when the degree of vacuum is low can be obtained at low cost, and hence, a display having a high luminous efficiency and high reliability can be realized.
An electron source device, comprising:
The electron source device as set forth in claim l,wherein at least one layer selected from the first conductor layer, the second conductor layer and the porous layer is patternized.
An electron source device, comprising:
Dependencies are inferred from the claim text.