Patent ID: 8268715

Claim:
A method comprising: forming a passivation layer on an integrated circuit structure; forming a redistribution level on the passivation layer; forming a resist layer on the redistribution level; forming a rigid elongate first conductor including a first portion and a second portion, wherein the second portion is entirely disposed and fixed within an aperture of the redistribution level and the first portion extends from the second portion outside the redistribution level approximately perpendicular to a surface of the redistribution level, the first conductor including a longitudinal first axis, the first portion including a first surface extending substantially radially outwardly from the first axis to an outer edge of the first surface, the first portion including a rounded second surface remote from the second portion and extending from the outer edge of the first surface to a center of the second surface along the first axis; removing the resist layer to expose the first portion of the first conductor, wherein the first surface is spaced from the redistribution level by a distance substantially equal to a length of the second portion; and forming a second conductor, wherein the first portion of the first conductor extends into the second conductor along the first axis, the second conductor being formed around the first surface and the rounded second surface of the first portion.