Patent ID: 8890324

Claim:
A structure having a semiconductor substrate, comprising: an opening in the substrate having depth from a top surface of the substrate to a bottom surface of the substrate; and a conductive material filling the opening; wherein the opening: has a length direction and a width direction, wherein the width direction is substantially perpendicular to the length direction; has a first feature and a second feature spaced apart by a first length, wherein the first length is substantially parallel to the length direction, and wherein the first feature has a first width as a maximum width of the first feature and the second feature has a second width as the maximum width of the second feature; and has a minimum width located between the first feature and the second feature that is no more than one fifth the first length, wherein the first width and the second width are each at least twice the minimum width, wherein each of the first width, the second width, and the minimum width is substantially parallel to the width direction.