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Patent classifications
H
ELECTRICITY
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H01
ELECTRIC ELEMENTS
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H01J
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
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2237/00
Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
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H01J2237/04
Means for controlling the discharge
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H01J2237/045
Diaphragms
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H01J2237/0451
with fixed aperture
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H01J2237/0453
multiple apertures
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