Patent ID: 6458706
Filing Date: 2002-10-01
Classification: H01L

Abstract:
A method for creating a hole in a semiconductor surface, comprising the steps of:providing a semiconductor substrate said substrate having a semiconductor layer; patterning and etching a hole in said semiconductor layer; depositing a non-conformal layer of dielectric over a surface of said semiconductor layer thereby including inside surfaces of said hole; etching said non-conformal layer of dielectric, thereby removing the dielectric from the bottom of the hole while essentially leaving the dielectric in place around an upper perimeter of the hole and overlying the surface of said semiconductor layer, lining sidewalls of the hole with a protective coating of dielectric, thereby making the hole available for electrical connection; depositing a layer of conductive material over a surface of said layer of non-conformal dielectric; and planarizing said layer of conductive material using methods of Chemical Mechanical Polishing.