Patent ID: 6822473
Filing Date: 2004-11-23
Classification: G01R,H01L

Abstract:
An interconnect test structure for determining electromigration permeability of a layer material, comprising:a feeder line, a test line, and a supply line, with current flowing from the supply line through the test line to the feeder line; and a no-flux structure disposed between the feeder line and the test line, and the layer material being disposed between the test line and the supply line; wherein a respective current density and length product for each of the test line and the supply line is less than a critical Blech length constant, (J*L)CRIT, and wherein a net current density and length product (J*L)NET for the test line and the supply line is greater than the (J*L)CRIT, and wherein the electromigration permeability of the layer material is determined from an electromigration lifetime of the interconnect test structure.