An apparatus comprises a storage medium, a head substrate, wherein the storage medium and the head substrate are separated by a gap, a plurality of electrodes separated from each other, and a support structure positioned in the gap for supporting some of the electrodes. An apparatus comprising a storage...http://www.google.com.au/patents/US7903532?utm_source=gb-gplus-sharePatent US7903532 - Elevated electrodes for probe position sensing
