Defect inspection method and defect inspection apparatus

Details Defect inspection method and defect inspection apparatus Defect inspection method and defect inspection apparatus

2008-02-27

2010-12-07

Toatley, Gregory J (Department: 2877)

Optics: measuring and testing

Inspection of flaws or impurities

Surface condition

C356S237500

Reexamination Certificate

active

07847927

ABSTRACT:
Provided are a defect inspection apparatus having a large range for receiving light scattering from fine defects while securing a sufficiently large signal strength; and a defect inspection method for the same. The defect inspection apparatus includes: a stage part capable of traveling relative to optical systems with a substrate to be inspected mounted on the stage part; an illumination optical system for illuminating an inspection area on the substrate; a detection optical system for detecting light coming from the inspection area on the substrate; an image sensor for converting, to a signal, an image which is formed on the image sensor by the detection optical system; a signal processor for detecting defects by processing the signal from the image sensor; and a plane reflecting mirror, arranged between the detection optical system and the substrate, for transmitting the light, which comes from the substrate, to the detection optical system.

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