Patent ID: 8633482

Claim:
A device comprising: a feed line having a first and a second end and a stress line of a test structure disposed in a first conductive material layer disposed over a workpiece; at least one first via coupled to the second end of the feed line and at least one second via coupled to the stress line disposed in a second conductive material layer adjacent to the first conductive material layer; a link between the at least one first via and the at least one second via disposed in a third conductive material layer adjacent to the second conductive material layer; a first thermal heatsink physically contacting the first end of the feed line, the first thermal heatsink having a wing-shaped region, the wing-shaped region being wider than a width of the feed line, wherein the first thermal heatsink is disposed in the first conductive material layer; and a second thermal heatsink disposed in the third conductive material layer, wherein at least one third via in the second conductive material layer physically contacts the second thermal heatsink and the first thermal heatsink.