Patent ID: 6496748
Filing Date: 2002-12-17
Classification: H01L

Abstract:
A wafer flattening process which causes a nozzle to scan the entire surface of a wafer based on position-speed data comprised of coordinates on a plane including the surface of the wafer and a nozzle relative speed set substantially inversely proportionally to the value of thickness of the wafer at those coordinates and flattens the wafer by activated species gas sprayed from the nozzle, said wafer flattening process comprising the steps of:using, as dummy data, position-speed data outside of a predetermined area set on the wafer closest to an imaginary line extending from the center of the wafer in the radial direction; and setting the nozzle relative speed of the dummy data to be substantially the same as the nozzle relative speed of the position-speed data of the outer rim of the above predetermined area on the imaginary line.