Patent ID: 7579210

Claim:
A method of forming an electronic device comprising: providing a substrate, said substrate including a first conductive material and a first insulator formed over said first conductive material, said first insulator having an opening, said opening exposing a top surface of said first conductive material, said opening having a first sidewall surface and a second sidewall surface; forming a second conductive material over said opening, said second conductive material contacting said first sidewall surface to form a first conductive region, said first conductive region contacting said first conductive material and extending to a first height above said first conductive material, said second conductive material contacting said second sidewall surface to form a second conductive region, said second conductive region contacting said first conductive material; forming a second insulator material over said second conductive material, said second insulator material occupying said opening; and removing a portion of said second insulator material disposed above said second conductive region to expose said second conductive region without exposing said first conductive region.