Radiant energy – Irradiation of objects or material – Irradiation of semiconductor devices
Patent
1993-03-30
1995-01-03
Berman, Jack I.
Radiant energy
Irradiation of objects or material
Irradiation of semiconductor devices
250398, H01J 3730
Patent
active
053789172
ABSTRACT:
In an ion optical imaging system, especially for lithographic imaging on a wafer, two collecting lenses are provided between the mask and the wafer. At least one of the collecting lenses is a three-electrode grid lens, i.e. a lens in which a grid is disposed perpendicular to the optical axis between a pair of tubular electrodes.
REFERENCES:
patent: 4985634 (1991-01-01), Stengl et al.
Zworykin et al., Electron Optics and the Electron Microscope, 1945, pp. 449-452.
Chalupka Alfred
Stengl Gerhard
Vonach Herbert
Berman Jack I.
Dubno Herbert
IMS Ionen Mikrofabrations Systeme Gesellschaft m.b.H.
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