The present invention includes device, system, method of using and making a microneedle array including the steps of forming one or more pins on a substrate, depositing one or more layers on the one or more pins and the substrate, exposing a portion of the one or more pins, and separating the one or...http://www.google.se/patents/US7627938?utm_source=gb-gplus-sharePatent US7627938 - Tapered hollow metallic microneedle array assembly and method of making and using the same
