Patent ID: 6682605
Filing Date: 2004-01-27
Classification: B08B,H01L,Y10S

Abstract:
A method for removing a coating layer on an alignment mark on a wafer in a wafer edge cleaning chamber comprising the steps of:providing a wafer having an active surface comprising at least two alignment marks, wherein a coating layer is present on each of said at least two alignment marks; providing a cleaning chamber having a cavity therein and a lid member suspended in said cavity; providing a wafer chuck rotatably mounted in said lid member for holding said wafer with said active surface in a faced-down position; positioning the wafer on said wafer chuck such that the wafer chuck holds the wafer with the coating layer and said at least two alignment marks on said active surface in a faced-down position; mounting at least two solvent dispensing arms in an outer peripheral area of said lid member juxtaposed to said wafer chuck; and removing said coating layer from each of said at least two alignment marks of the wafer by spraying a flow of solvent from said at least two solvent dispensing arms upwardly towards said active surface of the wafer when the wafer is held in a stationary position by the wafer chuck, each of said at least two solvent dispending arms being positioned corresponding to a position of each of said at least two alignment marks.