Patent ID: 6890387

Claim:
A device for correcting defects of pattern film on a surface of a substrate, comprising: a holder for holding the substrate with the surface facing downward; a laser irradiator for irradiating laser light upward at a white defect on the surface; and a gas window for blowing material gas on the surface and conducting laser light from the laser irradiator through the gas window to the white defect in order to form pattern film over the white defect, wherein the laser irradiator comprises a first laser source for irradiating first laser light for vaporizing pattern film, and a second laser source for irradiating second laser light for laser CVD, and wherein the holder sucks the substrate in order to hold the substrate, wherein the gas window comprises: a gas circulatory unit for providing gases to the gas window; a flat lower window for receiving laser light; a round groove; a laser irradiating hole provided between the round groove and the flat lower window; a first opening provided closer to the flat lower window than the laser irradiating hole, the first opening providing purge gas from the gas circulatory unit into the gas window; a second opening provided closer to the laser irradiating hole than the flat lower window, the second opening providing material gas from the gas circulatory unit into the gas window; and a third opening provided adjacent to the round groove, the third opening sucking the purge gas out of the gas window.