Patent ID: 9111657
Filing Date: 2015-08-18
Classification: G21K,H01F,H01J

Abstract:
1. A charged particle optical device for manipulating a trajectory of one or more beamlets of charged particles, said charged particle optical device comprising a first electromagnetic deflector comprising a substantially planar substrate having a first surface at or near an upper side of said substantially planar substrate, a second surface at or near a lower side of said substantially planar substrate, and a substantially even thickness, wherein the substrate comprises: a through opening for passing said one or more beamlets there through, wherein said through opening debouches in the upper side and lower side of said substantially planar substrate; a first and a second coil, wherein each of said first and second coil comprises one or more conducting upper leads arranged on the first surface, one or more conducting lower leads arranged on the second surface, and one or more vias which extend through said substrate wherein each of said vias is arranged for conductively connecting one of said upper leads with one of said lower leads for forming said coil; wherein said first and second coils are arranged on either side of the through opening.