Patent ID: 9048057
Filing Date: 2015-06-02
Classification: B82Y,H01J

Abstract:
1. A field emission electron gun comprising: a supported electron emitter tip; an extractor anode; and means enabling creation of an electric potential difference between the emitter tip and the extractor anode, wherein the emitter tip comprises a single conductive tip support and a single end cone, wherein the single end cone is obtained by depositing a carbon-based material directly onto a nanofiber using a time-of-flight chemical vapor deposition process, without interposing any non-graphene-based coating layer on the nanofiber and without forming any non-graphene-based coating layer on the obtained end cone, the carbon-based material being chosen from a group comprising carbon and C wherein the single end cone has a nanometric apex and a micrometric base and is aligned with and bonded to the conductive tip support, and wherein the nanofiber has a diameter that is less than 20 nm.