Patent ID: 6238511
Filing Date: 2001-05-29
Classification: B05D,B32B,G03F,H01L,Y10S,Y10T

Abstract:
A method of processing a substrate for removing a coating film from the substrate by dissolving the coating film with a solvent, comprising the steps of:(a) supplying a first-supply solvent independently to each of a first upper surface peripheral portion extending from approximately an outermost substrate perimeter to a predetermined first inner substrate perimeter and a first lower surface peripheral portion extending from approximately the outermost substrate perimeter to a second predetermined inner substrate perimeter, said first-supply solvent dissolving a first amount of coating film from the first upper surface peripheral portion, the first lower surface peripheral portion and a first edge portion extending along an outer substrate edge, and simultaneously suction-discharging an excess of the first-supply solvent and a dissolved matter sideward and outward of the substrate by way of a passage having an orifice portion; and(b) supplying a second-supply solvent to a second upper surface peripheral portion extending from approximately the outermost substrate perimeter to a predetermined third inner substrate perimeter, and simultaneously supplying the second-supply solvent to a second lower surface peripheral portion extending from approximately the outermost substrate perimeter to a fourth predetermined inner substrate perimeter, said second-supply solvent dissolving a second amount of coating film from the second upper surface peripheral portion, the second lower surface peripheral portion and a second edge portion extending along the outer substrate edge, said second supply solvent supplied to the second lower surface peripheral portion in an amount smaller than the first-supply solvent supplied to the first lower surface peripheral portion in the step (a); or smaller than the second-supply solvent supplied to the second upper surface peripheral portion in step (b), and simultaneously suction-discharging an excess of the second-supply solvent and a dissolved matter sideward and outward of the peripheral portion of the substrate through the passage, wherein said first edge portion and said second edge portion are substantially the same.