Cold cathodes, e.g. field-emissive cathode

Introduced: September 1968

Title

Titles differ between systems:

IPC: Cold cathodes

CPC: Cold cathodes, e.g. field-emissive cathode

Full Title

Full titles differ between systems:

IPC:

Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps > Main electrodes > Cold cathodes

CPC:

Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps (details of electron-optical or ion-optical arrangements H01J3/00) > Main electrodes > Cold cathodes, e.g. field-emissive cathode

IPC and CPC are identically structured here. All 4 subcodes exist in both systems.

IPC defines codes here since 2000.

Child Classifications

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H01J 1/304 Field-emissive cathodes since 2000 +2 CPC IPC+CPC Available in IPC and CPC
H01J 1/308 Semiconductor cathodes, e.g. cathodes with PN junction layers since 2000 IPC+CPC Available in IPC and CPC
H01J 1/312 having an electric field perpendicular to the surface, e.g. tunnel-effect cathodes of metal-insulator-metal [MIM] type since 2000 IPC+CPC Available in IPC and CPC
H01J 1/316 having an electric field parallel to the surface, e.g. thin film cathodes since 2000 IPC+CPC Available in IPC and CPC