Patent ID: 6940170

Claim:
A device comprising: a) a substrate; b) a first dielectric layer positioned on the substrate; c) a second dielectric layer positioned on the first dielectric layer, wherein the first and second dielectric layers have dissimilar etching characteristics. d) a third dielectric layer positioned on the second dielectric layer; e) a fourth dielectric layer positioned on the third dielectric layer, wherein the first and fourth dielectric layers have dissimilar etching characteristics; f) a fifth dielectric layer positioned on the fourth dielectric layer, wherein the fifth dielectric layer has dissimilar etching characteristics with regard to the second and the fourth dielectric layers, and wherein the first and fifth dielectric layers have similar etching characteristics; g) a first region in the fifth dielectric layer defining a power line trench extending through the fifth, fourth and third dielectric layers; h) a second region in the fifth dielectric layer defining a signal line trench extending through the fifth dielectric layer; and i) a third region in the fourth dielectric layer underlying the signal line trench, defining a first via hole extending through the fourth, third, second and first dielectric layers, wherein the power line trench, the signal line trench and the first via hole are adapted for containing a triple damascene structure.