Support and selective coating procedure for conductive tracks e.g. on 'bio-chips', comprises using a polarization voltage shift system to select tracks

摘要

Support and selective coating procedure for conductive tracks, comprises using a polarization voltage shift system to select tracks. The support (10), consisting of a substrate with a series of conducting tracks (12) associated with a shared addressing contact, has a selector in the form of a voltage shift system (20) to determine the polarization voltage applied to the shared addressing contact and select which is the tracks receives an electro-chemical coating. The voltage shift system is based on the fact that the conducting tracks are in two groups with different conducting materials, made from the same semi-conducting material with different doping, and comprising at least one diode (13) and an electrical resistance (15) with a value sufficient to prevent the coating of tracks in a second group while a voltage is being applied to coat those in the first group.