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Related to darkfield illumination: Dark field microscopy
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Its ability to yield maximum sensitivity on very dense structures is due to its Step&Image(TM) 2D combination of high resolution 2D brightfield imaging and darkfield illumination, which provides not only maximum resolution but also maximum contrast; both conventional brightfield and e-beam inspection lack this contrast.
Besides imaging bottles, darkfield illumination is also effective when examining food through cellophane or other reflective films.
Negevtech's revolutionary Step&Image technology with brightfield or darkfield illumination delivers unique sensitivity on 90nm and 65nm technology wafers and has become a natural "Tool of Record" for nanometer inspection for several Negevtech customers.