Patent ID: 6261947
Filing Date: 2001-07-17
Classification: H01L

Abstract:
A method of fabricating a contact for electrical connection to a conductive element of an integrated circuit, the method comprising:partially forming a via in a layer over the conductive element, wherein the via is defined by an opening in a photoresist pattern;removing the photoresist pattern prior to exposure of the conductive element at a bottom of the via;subsequently performing a blanket etch to expose the conductive element at the bottom of the via, said blanket etch forming a first set of sloping upper side edges and a second set of sloping upper side edges, said first set of sloping upper side edges being connected to a first set of substantially vertical sidewalls and forming an exterior angle greater than ninety degrees and less than one hundred eighty degrees, said second set of sloping upper side edges being connected to a second set of substantially vertical sidewalls and forming an exterior angle greater than ninety degrees and less than one hundred eighty degrees, the first set of sloping upper edges connected to the second set of substantially vertical sidewalls; andfilling the via with a conductive material.