Patent ID: 8536564
Filing Date: 2013-09-17
Classification: H01J,H01L

Abstract:
1. An integrated field emission array for ion desorption, comprising: an electrically conductive substrate; a dielectric layer lying over the electrically conductive substrate comprising a plurality of laterally separated cavities extending through the dielectric layer; a plurality of conically-shaped emitter tips, each emitter tip disposed concentrically within a laterally separated cavity and electrically contacting the substrate; and a gate electrode structure so conformed as to define a plurality of annular gate electrodes, each said annular gate electrode disposed concentrically above an emitter tip to provide a plurality of respective gate apertures, and wherein each said annular gate electrode comprises a ring of rounded or ovular cross section suspended from an inner face of a concentric support member so as to overhang a respective one of the laterally separated cavities.