A device in accordance with the present invention has a top metal layer that shows increased resistance to degradation such as abrasion, erosion, or both. A device in accordance with the present invention includes a device layer and a top metal layer. The device layer includes contact sensing elements...http://www.google.ca/patents/US7940249?utm_source=gb-gplus-sharePatent US7940249 - Devices using a metal layer with an array of vias to reduce degradation
