CPC Subgroup Additional Only
H01J 2237/285 Emission microscopes
Full Title
Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging > Electron or ion microscopes > Emission microscopes
3 direct subcodes
Child Classifications
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- H01J 2237/2852 Auto-emission (i.e. field-emission)
- H01J 2237/2855 Photo-emission
- H01J 2237/2857 Particle bombardment induced emission