Patent ID: 6420272
Filing Date: 2002-07-16
Classification: H01L

Abstract:
A method for removing a mask covering a top surface of region which rests on a support surface of material similar in composition to that of the mask without removing a portion of the support surface comprising the steps of:forming a masking layer over the mask and over portions of the support surface and covering sidewalls of the region such that the surface of the masking layer is planar, wherein the masking layer is thinner where same transverses a top of the region than where same covers the support surface; removing a thickness of the masking layer equal to the thickness of same over the top of the region so as to expose at least a top surface of the mask; etching the exposed top surface of the mask to remove the mask and thus expose the top portion of the region with the masking layer protecting the support surface from being removed; and removing the remaining masking layer.