| 摘要 |
PCT No. PCT/EP96/05528 Sec. 371 Date Aug. 29, 1997 Sec. 102(e) Date Aug. 29, 1997 PCT Filed Dec. 11, 1996 PCT Pub. No. WO97/25735 PCT Pub. Date Jul. 17, 1997An electron beam pattern-writing column comprises an emitter and an extractor (14, 15) for generating a low-energy electron beam (13), a series of three electrostatic triple element lenses (17, 18, 21) for focussing the beam, and an electrostatic double deflector (20), which is disposed ahead of the final lens (21), for deflecting the beam to scan a substrate (11) on which a pattern is to be written. After focussing and deflection of the beam have been carried out by the electrostatic components, which are low power and thus have no significant heat output, the beam electrons are accelerated by the final element (21c) of the final lens (21) into a high-energy beam with the required strength for high-quality pattern writing.
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