Patent ID: 8525399
Filing Date: 2013-09-03
Classification: H01J

Abstract:
1. An electron emission element comprising: a conductive substrate having a first main surface and a second main surface; a first diamond layer of a first conductivity type formed on the first main surface of the conductive substrate; a second diamond layer of the first conductivity type formed on a first portion of a first main surface of the first diamond layer, wherein the first main surface of the first diamond layer is opposite the second main surface of the first diamond layer which is in contact with the first main surface of the conductive substrate; a first electrode formed on a second portion of the first main surface of the first diamond layer, wherein the first portion of the first main surface of the first diamond layer is disparate to the second portion of the first main surface of the first diamond layer; and a second electrode formed on the second main surface of the conductive substrate, so as to sandwich the conductive substrate and the first diamond layer in series between the first electrode and the second electrode, wherein, in the event of application of electric power between the first electrode and the second electrode, the first diamond layer and the conductive substrate are self-heated by current flowing therethrough, thereby heating the second diamond layer.