US 12,451,318 B2
Cathode device with improved electron emitter contacting
Michael Wimmer, Weisendorf (DE); Joerg Freudenberger, Kalchreuth (DE); Anja Fritzler, Erlangen (DE); Christoph Jud, Nuremberg (DE); and Peter Geithner, Erlangen (DE)
Assigned to SIEMENS HEALTHINEERS AG, Forchheim (DE)
Filed by Siemens Healthineers AG, Forchheim (DE)
Filed on Jan. 29, 2025, as Appl. No. 19/039,935.
Claims priority of application No. 10 2024 200 885.0 (DE), filed on Jan. 31, 2024.
Prior Publication US 2025/0246394 A1, Jul. 31, 2025
Int. Cl. H01J 35/06 (2006.01)
CPC H01J 35/065 (2013.01) [H01J 2235/062 (2013.01); H01J 2235/068 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A cathode device for an X-ray source, the cathode device comprising:
an electron emitter including,
a plurality of field effect emitter elements aligned in parallel to form an emission surface on an upper side of the plurality of field effect emitter elements aligned in parallel,
a gate electrode, arranged above the emission surface,
a multiple first contact elements for at least two independently current-carrying current paths of the electron emitter, electrons from at least one of the current paths are emittable depending on an emission voltage between the gate electrode and the emission surface via the field effect emitter elements; and
an emitter seat including multiple second contact elements, the multiple second contact elements connectable with the multiple first contact elements for closing the current paths, wherein the multiple first contact elements are on a side of the plurality of field effect emitter elements aligned in parallel facing away from the emission surface.