Patent ID: 6627882
Filing Date: 2003-09-30
Classification: H01J

Abstract:
An electrospray device for generating multiple sprays from a single fluid stream comprising:a substrate having: a) an injection surface; b) an ejection surface opposing the injection surface, wherein the substrate is an integral monolith having either i) a plurality of spray units at least one spray unit capable of generating a single electrospray plume wherein the entrance orifice of at least one spray unit is in fluid communication with one another or ii) a plurality of spray units at least one spray unit capable of generating multiple electrospray plumes wherein the entrance orifice of at least one spray unit is in fluid communication with at least one other or iii) a single spray unit capable of generating multiple electrospray plumes, for spraying the fluid, each spray unit comprising: an entrance orifice on the injection surface, an exit orifice on the ejection surface, a channel extending between the entrance orifice and the exit orifice, and a recess surrounding the exit orifice positioned between the injection surface and the ejection surface; and c) an electric field generating source positioned to define an electric field surrounding at least one exit orifice.