A photo-ablation technique is used to create apertures (4) in a layer (2) of electrically insulating material and allow electrically conducting material (3) exposed through the apertures to create a microelectrode. The microelectrode can be used for assay methods and in an assay unit....http://www.google.es/patents/US5635054?utm_source=gb-gplus-sharePatente US5635054 - Microelectrodes and amperometric assays
