H ELECTRICITY
H01 ELECTRIC ELEMENTS
H01J ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
2237/00 Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
H01J2237/32 Processing objects by plasma generation
H01J2237/33 characterised by the type of processing
H01J2237/3343 Problems associated with etching
H01J2237/3345 anisotropy