Charged particle optical device
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United States of America Patent
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Aug 18, 2015
Grant Date -
Mar 12, 2015
app pub date -
Sep 4, 2014
filing date -
Sep 6, 2013
priority date (Note) -
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Abstract
The invention relates to a charged particle optical device for manipulating a trajectory of multiple beamlets of charged particles. Said charged particle optical device comprising an electromagnetic deflector comprising a planar substrate having an upper side and a lower side of said substrate, and an even thickness. The substrate comprises:
- a through opening for passing said beamlets there through, wherein said through opening debouches in the upper and lower side of said substrate;a first and a second coil, wherein each of said coils preferably is a substantially helical coil and comprises conducting upper leads arranged at the upper side, conducting lower leads arranged at the lower side, and vias extending through said substrate and which conductively connect 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.
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