Patent ID: 8323990

Claim:
An electromigration test method comprising: disposing a test structure on a substrate, the test structure comprising, a first metallization layer having a first portion and a second portion, and a second metallization layer having a first portion and a second portion, a dielectric layer between the first and second metallization layers, a first electrically conducting via extending through the dielectric layer and in direct contact with the first portion of the first metallization layer and with the first portion of the second metallization layer, a second electrically conducting via extending through the dielectric layer and in direct contact with the first portion of the second metallization layer and with the second portion of the first metallization layer, a third electrically conducting via extending through the dielectric layer and in direct contact with the second portion of the first metallization layer and with the second portion of the second metallization layer; applying a force voltage to one of the first and second portions of one of the first and second metallization layers; and detecting a changed sense voltage over time at another of the one of the first and second portions of one of the first and second metallization layers, wherein the changed sense voltage reveals a location of electromigration in at least one of the first and second metallization layers.