Implantable stimulator with a conformable foil-like electrode array

An implantable stimulator is provided having a conformable foil-like substrate, having a longitudinal axis extending from a pulse generator to a distal end of the substrate. The substrate comprising one or more adjacent polymeric substrate layers and an electrode array. The electrode array having a first and second electrode where one or more electrical interconnections are comprised in the substrate. The conformable foil-like substrate has a maximum thickness of 0.5 millimeter or less, proximate the electrodes. By providing a more easily patternable multilayer substrate, more complicated electrode array configurations may be supported, allowing a higher degree of flexibility to address transverse and/or longitudinal misalignment. By providing a relatively thin implantable electrode array user comfort may be increased through application of energy to tissue by the implantable stimulator.