Analyte sensors and methods for fabricating analyte sensors are provided. Inan exemplary embodiment, a planar flexibleanalyte sensor includes a flexible base layer and a first electrode formedfrom a layer of sputtered platinum on the base layer. Also,the analyte sensor includes an insulating dielectric layer over the baselayer, wherein the insulating dielectric layer leaves a portion ofthe first electrode exposed. Further, the analyte sensor includes anelectrochemical sensing stack over the exposed portion of the firstelectrode, including a glucose oxidase layer over the layer of sputteredplatinum and a glucose limiting membrane over the glucoseoxidase layer.
