CPC Subgroup Additional Only
H01J 2201/30446 characterised by the emitter material
Full Title
Electrodes common to discharge tubes > Cold cathodes > Field emission cathodes > characterised by the emitter material
7 direct subcodes
Child Classifications
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- H01J 2201/30449 Metals and metal alloys
- H01J 2201/30453 Carbon types
- H01J 2201/3048 Semiconductor materials
- H01J 2201/30484 Carbides
- H01J 2201/30488 Nitrides
- H01J 2201/30492 Borides
- H01J 2201/30496 Oxides