Patent ID: 7829369

Claim:
A method of forming an opening, comprising: forming a metal-containing structure in a first layer over a region of a semiconductor substrate; forming dielectric material in at least a second layer over the metal-containing structure; forming a patterned metal-containing material in at least a third layer over the dielectric material, the patterned metal-containing material having a gap extending therethrough; and removing an entirety of the metal-containing structure through the gap to leave an opening over the region of the semiconductor substrate, wherein: the first layer is above the region; the second layer is above the first layer; the third layer is above the second layer; at least some of the dielectric material is located between the metal-containing structure and the patterned metal-containing material; and the metal-containing structure is electrically isolated from the patterned metal-containing material by the dielectric material that is located between the metal-containing structure and the patterned metal-containing material.