Patent ID: 9213007
Filing Date: 2015-12-15
Classification: G01N

Abstract:
1. A foreign matter detector comprising: an X-ray source which is configured to irradiate a sample moving in a constant direction with primary X-rays; a parallel two-dimensional slit which includes a plurality of slits arranged in at least a moving direction of the sample and is configured to emit parallel secondary X-rays by extracting a parallel component of secondary X-rays generated from the sample irradiated with the primary X-rays; a dispersing element which is configured to disperse the parallel secondary X-rays to obtain a specific X-ray fluorescence; a Time Delay Integration (TDI) sensor which is configured to receive the X-ray fluorescence; and a control unit which is configured to control the TDI sensor to detect a foreign matter corresponding to the X-ray fluorescence, wherein the control unit is configured to integrate a luminance value of the X-ray fluorescence received by the TDI sensor while matching a direction and a speed of charge transfer of the TDI sensor to a direction and a speed of movement of the sample.