Patent ID: 6576559
Filing Date: 2003-06-10
Classification: G01N,H01J

Abstract:
A semiconductor manufacturing method comprising the steps of:providing a semiconductor substrate in a processing chamber; generating a plasma in the processing chamber; manufacturing a semiconductor substrate by carrying out processing on the semiconductor substrate by the generated plasma in the processing chamber; detecting a foreign particle floating within one of the generated plasma and an area in proximity thereto in the processing chamber including the steps of radiating an intensity-modulated light, into the processing chamber through a radiation window provided on a wall of the processing chamber; optically receiving a light obtained from the processing chamber through an observation window provided on the wall of the processing chamber, by a detector, and converting the received light into a first signal; obtaining information of the floating foreign particle, by extracting from the first signal a signal component having a frequency which is the same as that of the intensity-modulated light; and taking the manufactured semiconductor substrate outside from the processing chamber.