Patent ID: 8326393

Claim:
An implantable sensor for determining a concentration of at least one analyte in a body tissue or a body fluid, the implantable sensor having a layered construction comprising at least one insulating carrier substrate and at least two electrodes which are arranged in at least two different layer planes of the implantable sensor, are electrically isolated from one another by the at least one insulating carrier substrate and have electrode areas, the electrode areas facing the medium when the sensor has been implanted, and being in contact directly or via a generally analyte-permeable membrane layer with the body tissue or body fluid over a large area and substantially uniformly, the implantable sensor further comprising at least two electrode contact layers in electrical contact respectively with the at least two electrodes, wherein the at least one insulating carrier substrate has a width, and the at least two electrodes or the at least two electrode contact layers extending over at least 80% of the entire width of the at least one insulating carrier substrate.