Patent ID: 6545755
Filing Date: 2003-04-08
Classification: G01J,G01N

Abstract:
A micro-Raman spectroscopy system comprising:an optical microscope for observing a field of view on a wafer for observation of morphologies of a foreign material on the wafer; a sample stage having a function of moving the foreign material into the field of view of the optical microscope; a wafer transport mechanism for taking the wafer from a wafer cassette and setting the wafer on the sample stage; at least one Raman-exciting laser for exciting chemical bonds in the foreign material on the wafer; an optical path not including an optical fiber formed between said Raman-exciting laser and the foreign material on the wafer includes at least one of a reflecting mirror and optical lenses; at least one Raman analysis optical system for bringing the optical axis of the Raman-exciting laser into coincidence with the optical axis of the optical microscope to direct laser light to the foreign material on the wafer, said Raman analysis optical system also acting to take Raman scattering light emitted from the foreign material excited by the laser light out of the optical axis of the optical microscope; an optical path formed between said Raman spectroscopy optical system and said Raman spectrometer is composed of at least optical fiber; a Raman spectrometer for spectroscopically analyzing the Raman scattering light taken from the foreign material on the wafer by the Raman analysis optical system; and a control means for controlling the sample stage, the wafer transport mechanism, and the Raman spectrometer, said control means acting to drive the sample stage according to positional information on the foreign material previously obtained by a separate foreign material inspection system, the sample stage having the wafer set thereon, to reproduce an image of the foreign material within the field of view of the optical microscope.