Patent ID: 7075072

Claim:
A detecting apparatus for detecting a defect on a surface of a sample, comprising: an electron gun for emitting an irradiation beam toward the sample held in a vacuum environment so that secondary electrons are emanated from the sample; an EB-TDI sensor for detecting the secondary electrons emanated from the sample, the EB-TDI sensor permitting the secondary electrons to enter the first sensor surface directly and accumulating and integrating charges on the sensor surface to form the two-dimensional image, said EB-TDI sensor being disposed in the vacuum environment; a stage for mounting and moving the sample continuously in the direction of the integration on the sensor surface of the EB-TDI; an electro-optical system for guiding the secondary electrons to the EB-TDI sensor; and a feed through for transmitting a signal from the EB-TDI sensor to a processing device, wherein the processing device processes the signal to detect a defect on the surface of the sample, and the processing device is disposed outside of the vacuum environment.