Patent ID: 9006964
Filing Date: 2015-04-14
Classification: B82Y,H01J

Abstract:
1. A field emission cathode, comprising: an at least partly electrically conductive base structure; and a plurality of electrically conductive micrometer sized sections spatially distributed at the base structure, wherein at least a portion of the plurality of micrometer sized sections has a shape of polygonal or circular cylinders, an aspect ratio of at least 3:1, a diameter between 5-500 micrometers, and a length up to 10 millimeters, at least a portion of the plurality of micrometer sized sections each are provided with a plurality of electrically conductive nanostructures, the nanostructures including a nanowire having a length greater than 1000 nm and an aspect ratio greater than 20:1, and the nanostructures are provided on the outer tips of the micrometer sized sections.