Patent ID: 6309947
Filing Date: 2001-10-30
Classification: H01L

Abstract:
A method of making a semiconductor device, comprising steps of:forming a masking layer having a thickness on a surface of a substrate;selectively removing a portion of the masking layer to define one or more regions;forming at least one trench in the one or more regions;forming an oxide layer which substantially fills the at least one trench;via etching, removing a portion of the oxide layer and a portion of the masking layer to leave a remaining portion of the oxide layer which has a relatively planar surface that remains above the substrate surface and is recessed with respect to a remaining portion of the masking layer; andremoving the masking layer to expose the substrate surface, wherein the substrate surface and the planar surface of the oxide layer have a height differential substantially less than the thickness of the masking layer, and the planar surface remains above the substrate surface.