An electrochemical test strip is formed from a first insulating substrate layer, a second substrate layer, and an intervening insulating spacer layer. An opening in the insulating spacer layer defines a test cell which is in contact with the inner surface of the first substrate on one side and the inner...http://www.google.es/patents/US20090026091?utm_source=gb-gplus-sharePatente US20090026091 - Electrochemical Test Strip
