Sheet beam-type testing apparatus

Radiant energy – Irradiation of objects or material

Reexamination Certificate

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C250S370150, C250S371000, C720S688000, C720S684000, C720S687000, C359S019000, C359S198100, C359S199100, C359S212100, C359S223100, C359S244000, C359S245000, C359S315000, C359S322000, C359S323000

Reexamination Certificate

active

07829871

ABSTRACT:
An electron beam apparatus such as a sheet beam based testing apparatus has an electron-optical system for irradiating an object under testing with a primary electron beam from an electron beam source, and projecting an image of a secondary electron beam emitted by the irradiation of the primary electron beam, and a detector for detecting the secondary electron beam image projected by the electron-optical system; specifically, the electron beam apparatus comprises beam generating means2004for irradiating an electron beam having a particular width, a primary electron-optical system2001for leading the beam to reach the surface of a substrate2006under testing, a secondary electron-optical system2002for trapping secondary electrons generated from the substrate2006and introducing them into an image processing system2015, a stage2003for transportably holding the substrate2006with a continuous degree of freedom equal to at least one, a testing chamber for the substrate2006, a substrate transport mechanism for transporting the substrate2006into and out of the testing chamber, an image processing analyzer2015for detecting defects on the substrate2006, a vibration isolating mechanism for the testing chamber, a vacuum system for holding the testing chamber at a vacuum, and a control system2017for displaying or storing positions of defects on the substrate2006.

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