Patent ID: 8022491

Claim:
A method, comprising: forming a first opening between a first electrode and a second electrode, the forming comprising: forming a first electrode layer overlying a substrate; forming a first sacrificial layer overlying the first electrode layer; forming a second opening in the first sacrificial layer; forming a recess in the first electrode layer through the second opening, the recess having sidewalls; forming a second sacrificial layer on the sidewalls of the recess and overlying the first sacrificial layer, the second sacrificial layer having a first width that corresponds to a second width of the first opening; forming a second electrode layer in the recess; removing portions of the first and second sacrificial layer to expose a top surface of the first electrode layer; forming a third electrode layer overlying remaining portions of the first and second sacrificial layers, overlying the second electrode layer, and overlying the top surface of the first electrode layer; forming the first electrode and the second electrode by removing portions of the first and third electrode layers, the second electrode including portions of the second electrode layer and the third electrode layer; and releasing the first electrode from the second electrode by removing portions of the first and second sacrificial layers to form the first opening.