Patent ID: 6297557
Filing Date: 2001-10-02
Classification: H01L,Y10S

Abstract:
An aluminum filled via hole for use in a semiconductor interconnect structure, comprising:a first patterned metallization layer lying over a first dielectric layer, the first dielectric layer being a low K dielectrics having a K value of between about 2 and 4 and a thickness of between about 4,000 angstroms and about 13,000 angstroms;a second dielectric layer overlying the first patterned metallization layer and the first dielectric layer, the second dielectric layer being a low K dielectrics having a K value of between about 2 and 4 and a thickness of between about 4,000 angstroms and about 13,000 angstroms;an aluminum filled via hole defined through the second dielectric layer and in contact with the first patterned metallization layer, the aluminum filled via hole having an electromigration barrier cap that is tungsten containing over a topmost portion of the aluminum filled via hole that is substantially level with the second dielectric layer, the electromigration barrier cap having a thickness of between about 500 angstroms and about 2,500 angstroms; anda seed layer lining an inner surface of the aluminum filled via hole, the seed layer being a Ti/TiN layer having a thickness of between about 100 angstroms and about 1,000 angstroms.