Patent ID: 8643833
Filing Date: 2014-02-04
Classification: G01N

Abstract:
1. An inspection system for inspecting surface defects of a specimen, the system comprising: a laser focus module configured to emit laser beam on the specimen by a predetermined angle relative to a surface of the specimen, and to generate scattered light when the laser beam irradiates on the surface defects of the specimen; a microscope objective module configured in a scattering area of the scattered light to receive the scattered light; an image pick-up module comprising a charge-coupled device connected to the microscope objective module and arranged for transforming the scattered light into a digital signal; a process module coupled to the charge-coupled device and arranged for calculating sizes of the surface defects by analyzing the digital signal; and a reflected light capture module to capture a reflected light image, and the process module selectively calculates the size of each of the surface defects by analyzing diameters of caustic curves from the reflected light image.