Patent ID: 9472477
Filing Date: 2016-10-18
CPC Classification: G01R,H01L

Claim Text:
1. An electromigration test structure for interconnect liner integrity evaluation in a semiconductor interconnect structure, the test structure comprising: first and second feeding line segments; a stress line overlying the first and second feeding line segments; first vias interconnecting the first and second feeding line segments and the stress line, wherein the first vias comprise a bottom barrier; a first cathode sense and a second cathode sense interconnected to the first feeding line segment, wherein the first via in the first feeding line segment is intermediate the first and second cathode senses; and a first anode sense and a second anode sense interconnected to the second feeding line segment, and wherein during operation of the test structure, electrons flow from the first feeding line segment to the stress line and to the second feeding line segment.